2024-03-29T13:42:20Z
http://www.sciencepubco.com/index.php/IJPR/oai
oai:ojs.pkp.sfu.ca:article/679
2014-11-13T03:01:29Z
IJPR:ART
nmb a2200000Iu 4500
"130303 2013 eng "
2307-9010
10.14419/ijpr.v1i1.679
doi
dc
He's Semi-inverse Method for Camassa-Holm Equation and Simplied Modied Camassa-Holm Equation
Najafi, Malihe
Arbabi, Somayeh
Najafi, Mohammad
http://works.bepress.com/mohammad_najafi/
In this Letter, we study Camassa-Holm equation and Simpli?ed Modi?ed Camassa-Holm equation by using the well-known He’s Semi-inverse Method. The solitary solutions are obtained using the Ritz method. In fact, the He’s Semi-inverse Method is a promising method to various systems of linear and nonlinear equations.
Science Publishing Corporation
2013-03-03 12:35:46
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http://www.sciencepubco.com/index.php/IJPR/article/view/679
International Journal of Physical Research; Vol. 1 No. 1 (2013)
eng
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oai:ojs.pkp.sfu.ca:article/714
2014-11-13T03:01:30Z
IJPR:ART
nmb a2200000Iu 4500
"130314 2013 eng "
2307-9010
10.14419/ijpr.v1i1.714
doi
dc
On the electronic properties of some metals using density-functional theory
Mustapha, Lateef Olajuwon
DEPARTMENT OF PHYSICS,
UNIVERSITY OF IBADAN, IBADAN
NIGERIA
Oyewande, Oluwole Emmanuel
Department of Physics
University of Ibadan, Ibadan
Kolebaje, Olusola Tosin
Department of Physics
University of Ibadan, Ibadan
The use of density functional theory as a viable tool for investigating the electronic structure of both periodic and disordered system at ground state has been emphasized. In this study, we employ local density approximation and plane wave formalism via Quantum ESPRESSO, the selected metals was observed to exhibit degenerate but overlap bands except Copper and Silver whose inner d state function transits its broader s state. The study shows the efficacy of density functional theory as a promising tool for explaining electronic properties of metal.
Science Publishing Corporation
2013-03-03 12:35:46
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http://www.sciencepubco.com/index.php/IJPR/article/view/714
International Journal of Physical Research; Vol. 1 No. 1 (2013)
eng
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oai:ojs.pkp.sfu.ca:article/726
2014-11-13T03:01:31Z
IJPR:ART
nmb a2200000Iu 4500
"130406 2013 eng "
2307-9010
10.14419/ijpr.v1i1.726
doi
dc
Considering Artificial Viscosity in a SPH Model for Simulation of Transom Waves
Dashtimanesh, Abbas
Amirkabir University of Technology, Iran
Ghadimi, Parviz
Amirkabir University of Technology, Iran
In the current article, a SPH model based on artificial viscosity is utilized to simulate transom stern flow. In this context, Navier-Stokes equations are discretized in SPH formulation. Furthermore, predictor-corrector algorithm is implemented to solve the discretized equation. Due to density fluctuations, a density filter approach is also included. Finally, a rectangular body is considered as transom and is towed by a constant velocity. Moreover, simulations are performed at two different draft based Froude numbers at which complex physical phenomena have been observed. The obtained results are compared against both experimental and numerical solutions existing in literature. Some capabilities of SPH solution are also illustrated.
Science Publishing Corporation
2013-03-03 12:35:46
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http://www.sciencepubco.com/index.php/IJPR/article/view/726
International Journal of Physical Research; Vol. 1 No. 1 (2013)
eng
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oai:ojs.pkp.sfu.ca:article/779
2014-11-13T03:01:33Z
IJPR:ART
nmb a2200000Iu 4500
"130412 2013 eng "
2307-9010
10.14419/ijpr.v1i1.779
doi
dc
Principle of Least Action and Convergence of Systems towards State of Closure
Chatterjee, Atanu
Indian Astrobiology Research Centre
A natural process is defined as an act, by which a system organizes itself with time. Any natural process drives a system to a state of greater organization. Co-existence of a system in states of maximum organization as well as maximum action forms the core idea of the paper. Organization is a progressive change that gradually converge a system towards a state of closure. To understand this in detail, major influences have been drawn from the Principle of Least Action and, it allows us to see how this, most basic law of physics determines the development of the system towards states with less action i.e. organized states. And hence, it is being proposed, that the development of a system towards states of greater organization is cyclic in nature.
Science Publishing Corporation
2013-03-03 12:35:46
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http://www.sciencepubco.com/index.php/IJPR/article/view/779
International Journal of Physical Research; Vol. 1 No. 1 (2013)
eng
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oai:ojs.pkp.sfu.ca:article/839
2014-11-13T03:01:34Z
IJPR:ART
nmb a2200000Iu 4500
"130520 2013 eng "
2307-9010
10.14419/ijpr.v1i2.839
doi
dc
Developing a Computer Program for Mathematical Investigation of Stepped Planing Hull Characteristics
Loni, Afshin
Amirkabir University of Technology, Iran
Ghadimi, Parviz
Amirkabir University of Technology, Iran
Nowruzi, Hashem
Amirkabir University of Technology, Iran
Dashtimanesh, Abbas
Amirkabir University of Technology, Iran
Few authors have investigated the behavior of stepped planing hulls, so far. However, effects of such hulls on planing craft performance indicate that it can be a great improvement and must be analyzed more precisely. For this purpose, a mathematical model which was previously developed based on Savitsky’s formulation is implemented and the performance of a specific stepped planing hull is studied. Furthermore, a computer program is developed and effects of various parameters on stepped planing hull performance are investigated. Based on the obtained results, it is concluded that different heights of step leads to large variation of required power for the planing hull. Moreover, it can be mentioned that the parametric studies which are conducted in this article can be a good guide for engineering at initial design of a stepped planing hull.
Science Publishing Corporation
2013-05-17 04:05:42
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http://www.sciencepubco.com/index.php/IJPR/article/view/839
International Journal of Physical Research; Vol. 1 No. 2 (2013)
eng
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oai:ojs.pkp.sfu.ca:article/849
2014-11-13T03:01:35Z
IJPR:ART
nmb a2200000Iu 4500
"130517 2013 eng "
2307-9010
10.14419/ijpr.v1i2.849
doi
dc
Approximate analytical solution to a time-fractional Zakharov-Kuznetsov equation
Hammouch, Zakia
FST Errachidia
Moulay Ismail University
Mekkaoui, Toufik
FST Errachidia
Moulay Ismail University
In this paper we present the approximate analytical solution of a time-fractional Zakharov-Kuznetsov equation via the fractional iteration method. The fractional derivatives are described in the Caputo sense. The approximate results show that the fractional iteration method is a very ecient technique to handle fractional partial differential equations.
Science Publishing Corporation
2013-05-17 04:05:42
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http://www.sciencepubco.com/index.php/IJPR/article/view/849
International Journal of Physical Research; Vol. 1 No. 2 (2013)
eng
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oai:ojs.pkp.sfu.ca:article/1060
2014-11-13T03:01:36Z
IJPR:ART
nmb a2200000Iu 4500
"130724 2013 eng "
2307-9010
10.14419/ijpr.v1i2.1060
doi
dc
Effect of Bohm potential and magnetohydrodynamic wave propagation in Fermi degenerate quantum plasma
Garai, Sisir kr
Department of Pure and Applied Physics, Guru Ghasidas Vishwavidyalaya, Bilaspur (C.G)-495009, India
Prajapati, R. P.
In this paper we have investigated the effect of Bohm potential and electron spin on the low frequency magnetohydrodynamic wave propagation in quantum plasma. The elementary ideal about quantum collision process is also discussed. The quantum magnetohydrodynamic (QMHD) model is modified and a general dispersion relation is obtained using the plane wave approximation. This dispersion relation is reduced for the parallel and perpendicular mode of propagations. We find that the motion of Fermion particles in presence of magnetic field show the scattering phenomena. The quantum Bohm potential is coupled with the Alfven mode in perpendicular propagation but in the parallel mode of propagation the dispersion relation is unaffected due to the presence of magnetic field. From the curves we find that increase in Alfven velocity and sound velocity increases the frequency of the perturbations.
Science Publishing Corporation
2013-05-17 04:05:42
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application/vnd.openxmlformats-officedocument.wordprocessingml.document
http://www.sciencepubco.com/index.php/IJPR/article/view/1060
International Journal of Physical Research; Vol. 1 No. 2 (2013)
eng
Copyright (c)
oai:ojs.pkp.sfu.ca:article/1128
2014-11-13T03:01:37Z
IJPR:ART
nmb a2200000Iu 4500
"130809 2013 eng "
2307-9010
10.14419/ijpr.v1i2.1128
doi
dc
Strain effects in film materials based on metals
Makukha, Z.M.
Odnodvorets, L.V.
Protsenko, Ivan
Sumy State University
Shumakova, N.I.
The results of experimental and calculate studies of strain effect and magneto-strain effect in two- and multilayer film systems based on different metals with different structural and phase state was presented. For example film systems based on Fe and Pt strain effects in MOKE studies and calculated of value of the proposed strain coefficient of MOKE. For comparison was calculated of strain coefficient of giant magnetoresistance.
Science Publishing Corporation
2013-05-17 04:05:42
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http://www.sciencepubco.com/index.php/IJPR/article/view/1128
International Journal of Physical Research; Vol. 1 No. 2 (2013)
eng
Copyright (c)
oai:ojs.pkp.sfu.ca:article/1275
2014-11-13T03:01:39Z
IJPR:ART
nmb a2200000Iu 4500
"131115 2013 eng "
2307-9010
10.14419/ijpr.v1i2.1275
doi
dc
Geomagnetic and geoelectric investigation of mineral rocks at Awo, Osun state, southwest Nigeria
Ojo, Akintayo Olufemi
Osun State College of Education, Ilesa
Integrated geophysical survey was carried out at Awo, Egbedore Local Government, Osun State, Southwest Nigeria to identify the location and depth of formation of different magnetic minerals. Proton Precession Magnetometer (G – 856AX) and String R1 resistivity meter were used to obtain magnetic and resistivity data respectively. Sufer10 was used to present magnetic intensity anomaly maps and UBC, MAG3D program (version 4.0) was used to generate 3D inversion of the subsurface magnetic data. The slices of the 3D model at different depths were shown. Partial curve matching and Winresist (version 1.0) were used to treat the apparent resistivity data to generate sounding curves. The apparent resistivities obtained were compared with the published magnetic susceptibilities to identify the magnetic minerals and their locations in the study area. The results of the geophysical methods were in agreement and revealed that rocks at the centre towards the south western region are suspected to be Tantalite and Columbite while the north western region possibly harboured rocks such as Sandstone, Quartz and Calcite. More than fifty percentage of the volume has an intermediate magnetic susceptibility values indicating that the study area is predominantly a pegmatite vein and possibly harbours rocks such as Beryl, Tourmaline and Mica in both disseminated and massive quantities.
Science Publishing Corporation
2013-05-17 04:05:42
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http://www.sciencepubco.com/index.php/IJPR/article/view/1275
International Journal of Physical Research; Vol. 1 No. 2 (2013)
eng
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oai:ojs.pkp.sfu.ca:article/1817
2014-11-13T03:01:40Z
IJPR:ART
nmb a2200000Iu 4500
"140328 2014 eng "
2307-9010
10.14419/ijpr.v2i1.1817
doi
dc
Fundamental Nature of the Fine-Structure Constant
Sherbon, Michael
Independent
Arnold Sommerfeld introduced the fine-structure constant that determines the strength of the electromagnetic interaction. Following Sommerfeld, Wolfgang Pauli left several clues to calculating the fine-structure constant with his research on Johannes Kepler's view of nature and Pythagorean geometry. The Laplace limit of Kepler's equation in classical mechanics, the Bohr-Sommerfeld model of the hydrogen atom and Julian Schwinger's research enable a calculation of the electron magnetic moment anomaly. Considerations of fundamental lengths such as the charge radius of the proton and mass ratios suggest some further foundational interpretations of quantum electrodynamics.
Keywords: Euler's constant, Fine-structure constant, Fundamental constants, Kepler's equation, Natural philosophy.
Science Publishing Corporation
2014-03-28 13:05:12
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http://www.sciencepubco.com/index.php/IJPR/article/view/1817
International Journal of Physical Research; Vol. 2 No. 1 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/2152
2014-11-13T03:01:41Z
IJPR:ART
nmb a2200000Iu 4500
"140407 2014 eng "
2307-9010
10.14419/ijpr.v2i1.2152
doi
dc
Vibration analysis of a tapered beam with exponentially varying thickness resting on Winkler foundation using the differential transform method
Boreyri, Sayyad
Department of Marine Technology
Amirkabir University of Technology,Hafez Ave., Tehran, Iran
Mohtat, Pouya
Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
Ketabdari, Mohamad Javad
Department of Marine Technology, Amirkabir University of Technology, Hafez Ave., Tehran, Iran
Moosavi, Ali
Department of Mathematics, Sharif University of Technology, Tehran, Iran
In this paper, free vibration of a new type of tapered beam, with exponentially varying thickness, resting on a linear foundation is analyzed. The solution is based on a semi-analytical technique, the differential transform method (DTM). Applying DTM, nonlinear partial differential equations of the varying thickness beam are transformed into algebraic equations, which are then solved to obtain the solution. An Euler-Bernoulli beam with a number of boundary conditions and different exponential factor is taken into account. Results have been compared to the 4th order Runge-Kutta, and where possible with DQEM and analytical solution. These comparisons prove the preciseness of this method, based on which DTM can be considered as a powerful framework for eigenvalue analysis of new type of tapered beams.
Keywords: Free Vibration, Exponential (Tapered) Beam, Winkler Foundation, Differential Transform Method (DTM).
Science Publishing Corporation
2014-03-28 13:05:12
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http://www.sciencepubco.com/index.php/IJPR/article/view/2152
International Journal of Physical Research; Vol. 2 No. 1 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/2451
2014-11-13T03:01:42Z
IJPR:ART
nmb a2200000Iu 4500
"140602 2014 eng "
2307-9010
10.14419/ijpr.v2i2.2451
doi
dc
Simulating the interaction of solitary wave and submerged horizontal plate using SPH method
Aghili, Mirhossein
Amirkabir University of Technology, Iran
Ghadimi, Parviz
Amirkabir University of Technology, Iran
Faghfoor Maghrebi, Yaser
Amirkabir University of Technology, Iran
Nowruzi, Hashem
Amirkabir University of Technology, Iran
In the current study, weekly compressible smooth particle hydrodynamics (WCSPH) method is implemented to simulate solitary wave interaction with horizontal submerged plate at four different vertical positions. To accomplish this task, MLS density filter is applied to reduce the pressure fluctuations. Moreover, Symplectic scheme with dynamic boundary particle (DBP) is considered. Free surface profile, pressure, and vertical component of the wave force on the horizontal plate parameters are computed in this study. The obtained numerical results of solitary wave and its interaction with a horizontal plate are compared against existing experimental data and very good compliance is achieved. CFD results indicate that as distance of the horizontal plate from free surface decreases, wave energy reduces significantly. On the other hand, with an increase in horizontal plate distance from the seabed, vertical component of wave force and its pressure component substantially decrease.
Keywords: WCSHP; submerged horizontal plate; pressure; wave force; solitary wave.
Science Publishing Corporation
2014-06-02 14:49:55
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International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/2760
2014-11-13T03:01:43Z
IJPR:ART
nmb a2200000Iu 4500
"140606 2014 eng "
2307-9010
10.14419/ijpr.v2i2.2760
doi
dc
Optoelectronic and thermal properties of boron-bismuth compound
Daoud, Salah
Faculté des Sciences et de la Technologie, Université de Bordj Bou Arreridj, 34000, Algeria
Bioud, Nadhira
Laboratoire d'Optoélectronique et Composants, Université Ferhat Abbes- Sétif, 19000, Algeria
Labgaa, Noudjoud
Laboratoire d'Optoélectronique et Composants, Université Ferhat Abbes- Sétif, 19000, Algeria
Mezouar, Rabie
In the present work, we report ?rst principles calculations of the near-neighbor distance (bond length) and the average energy gap using the pseudopotential plane wave method, in the framework of the density functional theory (DFT) within the local density approximation (LDA) and the Hartwigzen-Goedecker-Hutter (HGH) scheme for the pseudopotential of Boron- Bismuth compound in its structure zincblende phase.
The refractive index, the plasmon energy, the force constants, the lattice energy, the homopolar and heteropolar energies, the ionicity, the linear optical susceptibility, the hardness, the dielectric constants, the Debye temperature and the melting temperature are then predicted by mean of some simple emperical formulas. The results obtained are analyzed and compared with the available theoretical data of the literature
Keywords: Optoelectronic and Thermal Properties, BBi Compound.
Science Publishing Corporation
2014-06-02 14:49:55
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International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/2843
2014-11-13T03:01:45Z
IJPR:ART
nmb a2200000Iu 4500
"140620 2014 eng "
2307-9010
10.14419/ijpr.v2i2.2843
doi
dc
Effects of low radioactivity of the Yemeni’s Catha edulis (Khat) and tobacco plants
AL-Jalali, Muhammad
Physics department - faculty of science Taif University - kingdom of Saudi Arabia
The present work aims to shed light on the relationship between the cause of cancer and low radioactivity distribution of Catha edulis (Khat) and tobacco grown in Yemen, whereas they have a remarkable relationship with human health, due chewing of Catha edulis and smoking tobacco simultaneously. The complicated behavior of smoking tobacco and chewing Catha edulis at the same time could be responsible for different kinds of cancer diseases. Wavelength Dispersive X-ray Fluorescence (WDXRF) spectrometer was used to specify the chemical composition of Catha edulis and tobacco plants. In addition, radioactive detectors reveal the distribution of the radioactivity of Catha edulis and Tobacco plants is higher than the natural radioactivity distribution, because of the presence of the heavy minerals and different radioisotopes in Catha edulis and Tobacco plants.
Keywords: Low Radioactivity, Catha Edulis, Tobacco, WDXRF, Oral and Lung Cancers.
Science Publishing Corporation
2014-06-02 14:49:55
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International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/2928
2014-11-13T03:01:46Z
IJPR:ART
nmb a2200000Iu 4500
"140625 2014 eng "
2307-9010
10.14419/ijpr.v2i2.2928
doi
dc
Investigation in Nano III-V ternary InxGa1-x P semiconductor materials by chemical vapor deposition
Alla, Srivani
Assistant professor
vedam, Ram murthy
professor
Veeraraghavaiah, G.
Phosphides of group III have generated important applications in optoelectronic devices. Principally InxGa1-xP is a novel alloy for the development of solid-state lighting and photovoltaic systems, since it is possible to control its band gap from 2.26 eV to 1.27 eV by simply varying the indium concentration. However during the growth of InxGa1-xP inherent defects are obtained in the material, degrading its optical properties. In this work, the effect of the indium concentration is studied. The results of the optical and structural characterization of a series of InxGa1-xP films (0 < x < 0.3) deposited by chemical vapor deposition (CVD) are reported.
Keywords: Inxga1-Xp, Semiconductor; Luminescence and Optoelectronics.
Science Publishing Corporation
2014-06-02 14:49:55
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International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/3079
2015-07-19T08:50:11Z
IJPR:ART
nmb a2200000Iu 4500
"140827 2014 eng "
2307-9010
10.14419/ijpr.v2i2.3079
doi
dc
Synthesis and characterization of CdS-PABS/MWCNT for solar cell applications, This paper has been withdrawn
K., Babu
Department of Physics, K.S.Rangasamy College of Arts & Science (Autonomous), Tiruchengode, Tamilnadu, India
S., Pradeep
Tamilnadu
S., Bhuvaneswari
Department of Physics, K.S.Rangasamy College of Arts & Science (Autonomous), Tiruchengode, Tamilnadu, India
Array
This paper has been withdrawn
Science Publishing Corporation
2014-06-02 14:49:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/3079
International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/3100
2014-11-13T03:01:48Z
IJPR:ART
nmb a2200000Iu 4500
"140812 2014 eng "
2307-9010
10.14419/ijpr.v2i2.3100
doi
dc
Structural properties of (B3) TlP under pressure
Daoud, Salah
Faculté des Sciences et de la Technologie, Université de Bordj Bou Arreridj, 34000, Algeria
Bioud, Nadhira
Laboratoire d'Optoélectronique et Composants, Université Ferhat Abbes- Sétif, 19000, Algeria
We present an Ab-initio study of the pressure effect on the structural properties of thallium phosphide (TlP) compound. The plane-wave pseudopotential approach to the density functional theory (DFT) within the local density approximation (LDA) implemented in Abinit code was used. The equilibrium lattice parameter, bulk modulus and its pressure derivatives, crystal density, near-neighbor and nearest-neighbor distances are calculated. The threshold pressure of the phase transition, the volume collapses and the Debye temperature are also obtained. Our results are in general in very good agreement with the previous results of the literature.
Keywords: PP-PW Approach, Structural Properties, TlP Compound.
Science Publishing Corporation
2014-06-02 14:49:55
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International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/3120
2014-11-13T03:01:49Z
IJPR:ART
nmb a2200000Iu 4500
"140811 2014 eng "
2307-9010
10.14419/ijpr.v2i2.3120
doi
dc
Reverse bias-dependence of schottky barrier height on silicon carbide: influence of the temperature and donor concentration
Latreche, Abdelhakim
Département des sciences de la matière, université de Bordj Bou Arreridj, Algeria
The work deals with the dependences of the Schottky barrier height (SBH) on the reverse bias voltage, temperature and on donor concentration of metal/4H-SiC Schottky diodes. Using the tunneling modeling we have shown that the Schottky barrier height on silicon carbide strongly depends on the reverse bias voltage, temperature and doping concentration. At room temperature, the Schottky barrier height increases with increasing the reverse bias voltage at high doping concentration (about 1016 cm-3), while, at low doping concentration (about 1015 cm-3) the Schottky barrier height decreases with increasing the reverse bias voltage. These behaviors are independent of the Schottky barrier lowering effect. That means other effects occur at the barrier and depend on the reverse applied bias. The barrier height increases with increasing temperature and doping concentration under reverse bias conditions. The barrier heights extracted from the Padovani-Stratton formulas are close to the barrier heights extracted from the Tsu-Esaki formula in particular for the thermionic-field emission.
Keywords: Extraction, Schottky Barrier Height, Reverse Bias, Tunneling, Silicon Carbide.
Science Publishing Corporation
2014-06-02 14:49:55
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International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/3315
2014-11-13T03:01:51Z
IJPR:ART
nmb a2200000Iu 4500
"140905 2014 eng "
2307-9010
10.14419/ijpr.v2i2.3315
doi
dc
Synthesis and characterization of Mn doped ZnS pellets
Shukla, Atul
Department of Physics & Electronics
Dr. R M L Avadh University, Faizabad (U.P)
India
Srivastva, Anupam
Department of Physics & Electronics
Dr. R M L Avadh University, Faizabad (U.P)
India
Vishwakarma, Rahul
Department of Physics & Electronics
Dr. R M L Avadh University, Faizabad (U.P)
India
Semiconducting nano-phosphor pellets have been fabricated by hydraulic pressure, using ZnS and Mn doped ZnS semiconducting materials, which is synthesized by physical evaporation technique. Structural characterizations of synthesized semiconducting nanophosphor materials and pellets have been done by X-ray diffraction measurement and SEM while optical characterizations are done by UV-Visible absorption measurement. XRD pattern showed that the synthesized ZnS, Mn doped ZnS materials and pellet have cubic structure with preferential orientation along (111) planes. Optical absorption measurements indicated that the absorption decreases with increase of percent of Mn in pellet. The average maximum grain size (25.13 nm), Minimum dislocation density (1.57 × 1011/cm3), lattice constant (5.398Å) and minimum band gap (3.2 eV) have been obtained. Suitable explanation is given in this paper.
Keywords: ZNS, MN, Grain Size, Band Gap and Lattice Constant.
Science Publishing Corporation
2014-06-02 14:49:55
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International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/3361
2014-11-13T03:01:52Z
IJPR:ART
nmb a2200000Iu 4500
"140908 2014 eng "
2307-9010
10.14419/ijpr.v2i2.3361
doi
dc
Semi-empirical prediction of physical properties of (B3) TlP compound
Daoud, Salah
Faculté des Sciences et de la Technologie, Université de Bordj Bou Arreridj, 34000, Algeria
Bioud, Nadhira
Laboratoire d'Optoélectronique et Composants, Université Ferhat Abbes- Sétif, 19000, Algeria.
The principal goal of this work is the prediction only by means of some emperical formulas and two other physical quantities (the bond length and the bulk modulus calculated initially from first-principle calculations) of the refractive index, the exciton Bohr parameter, the electronic polarizability, the plasmon energy, the force constants, the optical band gap energy, the homopolar and heteropolar energies, the bonding-antibonding energy gap, the ionicity, the dielectric constant, and the optical susceptibility of (B3) thallium phosphide (TlP) compound. In addition, the Debye temperature, the melting temperature, the thermal conductivity and finally the linear thermal expansion of this compound are also obtained. Our results are in general in good agreement with the previous results of the literature.
Keywords: Optical Properties, Thermal Properties, TlP Compound.
Science Publishing Corporation
2014-06-02 14:49:55
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International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
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oai:ojs.pkp.sfu.ca:article/3372
2014-11-13T03:01:53Z
IJPR:ART
nmb a2200000Iu 4500
"140916 2014 eng "
2307-9010
10.14419/ijpr.v2i2.3372
doi
dc
Convective heat and solute transfer in Newtonian fluid saturated inclined porous cavity
Abdelkrim, Latreche
universite constantine1
Mahfoud, Djezzar
universite constantine1
This paper summarizes a numerical study of double-diffusive natural convection in square inclined cavity filled with fluid saturated porous media. Transverse gradients of heat and solute are applied on the two horizontal walls of the cavity, while the other two walls are impermeable and adiabatic. The Darcy model with the Boussinesq approximation is used to solve the governing equations. The flow is driven by a combined buoyancy effect due to both temperature and concentration variations. A finite volume approach has been used to solve the non-dimensional governing equations. The results are presented in streamline, isothermal, iso-concentration, Nusselt and Sherwood contours for different values of the non-dimensional governing parameters.
Keywords: Boussinesq Approximation, Darcy Model, Finite Volumes, Inclined Cavity, Natural Convection, Porous Media.
Science Publishing Corporation
2014-06-02 14:49:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/3372
International Journal of Physical Research; Vol. 2 No. 2 (2014)
eng
Copyright (c)
oai:ojs.pkp.sfu.ca:article/4021
2015-02-09T05:24:54Z
IJPR:ART
nmb a2200000Iu 4500
"150206 2015 eng "
2307-9010
10.14419/ijpr.v3i1.4021
doi
dc
Research to an alternative explaination of redshift
Rota, Luciano
Is the “Big-Bang†really existed? The present research on theoretical base, through a correct and accurate analysis of the Doppler Effect, attempts to state that there is another concrete and sustainable way to understand the phenomenon of redshift, which could eradicate the hypothesis of an expanding universe.
Science Publishing Corporation
2015-02-06 14:29:34
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http://www.sciencepubco.com/index.php/IJPR/article/view/4021
International Journal of Physical Research; Vol. 3 No. 1 (2015)
eng
Copyright (c) 2015 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/5753
2016-05-14T12:37:20Z
IJPR:ART
nmb a2200000Iu 4500
"160203 2016 eng "
2307-9010
10.14419/ijpr.v4i1.5753
doi
dc
Structural and electronic properties of boron- bismuth compound under pressure
Daoud, Salah
Laboratoire Matériaux et Systèmes Electroniques (LMSE), Université Mohamed Elbachir El Ibrahimi de Bordj Bou Arreridj, Bordj Bou Arreridj, 34000, Algérie
Lebga, Noudjoud
Laboratoire d'Optoélectronique et Composants, Faculté des sciences, Université de Sétif 1, Sétif, 19000, Algérie
In the present work, we report ï¬rst principles calculations of the pressure effect on the structural and electronic properties of Boron- Bismuth (BBi) compound in its zincblende phase. The pseudopotential plane wave (PPW) method in the framework of the density func-tional theory (DFT) within the local density approximation for the exchange-correlation functional, and the Hartwigzen-Goedecker-Hutter (HGH) scheme for the pseudopotential were used in the calculation. The unit cell volume, the molecular and crystal densities, the equation of state and also the linear and quadratic pressure coefficients of the energy band-gaps are investigated.
Science Publishing Corporation
2016-02-03 10:11:32
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http://www.sciencepubco.com/index.php/IJPR/article/view/5753
International Journal of Physical Research; Vol. 4 No. 1 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/5775
2016-05-14T12:37:20Z
IJPR:ART
nmb a2200000Iu 4500
"160217 2016 eng "
2307-9010
10.14419/ijpr.v4i1.5775
doi
dc
A study on structural and electronic properties of GaAs1-xNx and GaAs1-xBix alloys
Aslan, Metin
Sakarya University
Yalcin, Battal Gazi
Sakarya University
We have performed first principles method to investigate structural and electronic properties of GaAs1-xNx and GaAs1-xBix ternary semiconductor alloy using Density Functional Theory and pseudo potential method within the Generalized Gradient Approximations and Local Density Approximation. The Zinc-Blende phase is found stable for GaAsN and GaAsBi alloys. In this study we investigate the both bowing parameters changing with Bismuth concentration in GaAsBi and Nitrogen concentration in GaAsN alloys. By using the bowing parameter of GaAsBi and GaAsN alloys we obtained the bandgap energies for all x concentrations (0 < x < 1) and lattice constant of both alloys which are important for wide range device application. For studied materials, lattice parameters and band gap energies are compared with available theoretical and experimental works.
Science Publishing Corporation
2016-02-03 10:11:32
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http://www.sciencepubco.com/index.php/IJPR/article/view/5775
International Journal of Physical Research; Vol. 4 No. 1 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/5823
2016-05-14T12:37:20Z
IJPR:ART
nmb a2200000Iu 4500
"160313 2016 eng "
2307-9010
10.14419/ijpr.v4i1.5823
doi
dc
Soliton solutions of nonlinear wave equation in finite de-formation elastic cylindrical rod by solitary wave ansatz method
Subhaschandra Singh, Salam
Physics Department, Imphal College, Imphal,Manipur, India.
In this paper, we consider nonlinear wave equation in finite deformation elastic cylindrical rod and obtain soliton solutions by Solitary Wave Ansatz method. It is shown that the ansatz method provides a very effective and powerful mathematical tool for obtaining solutions for Nonlinear Evolution Equations (NLEEs) in nonlinear Science.
Elastic Rod; Finite Deformation; Nonlinear Wave Equation; Solitary Wave Ansatz Method; Soliton.
Science Publishing Corporation
2016-02-03 10:11:32
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http://www.sciencepubco.com/index.php/IJPR/article/view/5823
International Journal of Physical Research; Vol. 4 No. 1 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/5902
2016-05-14T12:37:20Z
IJPR:ART
nmb a2200000Iu 4500
"160313 2016 eng "
2307-9010
10.14419/ijpr.v4i1.5902
doi
dc
Inhomogeneous cosmology with quasi-vacuum effective equation of state on Lyra manifold
Shchigolev, Victor
Department of Theoretical Physics, Ulyanovsk State University
A class of inhomogeneous Lemaître-Tolman cosmological models is obtained in the context of Lyra’s geometry. Cosmological models in Lyra’s geometry are studied under the condition of the minimal coupling of matter with the displacement vector field and the varying Λ term. Exact solutions to the model equations are obtained subject to the quasi-vacuum effective equation of state. As a result, the displacement field as well as the cosmological term can be expressed in terms of the energy density of matter. The rate of expansion and the deceleration parameter of the model are also studied
Science Publishing Corporation
2016-02-03 10:11:32
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http://www.sciencepubco.com/index.php/IJPR/article/view/5902
International Journal of Physical Research; Vol. 4 No. 1 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6045
2016-09-19T11:58:31Z
IJPR:ART
nmb a2200000Iu 4500
"160621 2016 eng "
2307-9010
10.14419/ijpr.v4i2.6045
doi
dc
Transverse vibration analysis of FGM plates with in-plane exponentially non-homogeneous material
Boreyri, Sayyad
PhD candidate,Department of Marine technologyAmirkabir University of Technology
Ketabdari, Mohamad Javad
Associate professor,Department of Marine technologyAmirkabir University of Technology
Mohtat, Pouya
Moosavi, Ali
In this research, free vibration of rectangular functionally graded (FG) plates with in-plane exponentially non-homogeneous material is investigated. Young’s modulus and mass density are assumed to vary between a metal-rich and a ceramic-rich zone along one in-plane direction of the plate.
The governing differential equation is derived for the case, and a truncated Taylor series expansion technique is utilized to calculate natural frequencies. A Levy-type solution is obtained for plates having two simply supported edges parallel with the material gradient direction. Results for normalized natural frequency are compared with the 4th order Runge-Kutta method, and when possible with exact solution, showing an accurate agreement. Furthermore, a comprehensive parametric study is carried out to determine the effects of different boundary conditions, aspect ratios, and material variations on the free vibration of FGM plates.
Science Publishing Corporation
2016-06-09 06:54:41
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http://www.sciencepubco.com/index.php/IJPR/article/view/6045
International Journal of Physical Research; Vol. 4 No. 2 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6052
2016-05-16T11:51:51Z
IJPR:ART
nmb a2200000Iu 4500
"160514 2016 eng "
2307-9010
10.14419/ijpr.v4i1.6052
doi
dc
Identification of zingiber components by gas chromatograph/mass spectrometer and semi-empirical calculations
Sarhan Mahmoud Abd El kareem, Mamoun
Egyptian Atomic Energy Authority
Abd El fattah Rabbih, Mohamed
Egyptian Atomic Energy Authority
Taha Mohamed Selim, Ezzat
Egyptian Atomic Energy Authority
The important used of Zingiber in different fields such as medicine and foods, this leads to study the physical and chemical properties of its components. The chemical components in Zingiber officinale Roscoe were identified by gas chromatograph/ mass spectrometer (GC/MS) with electron ionization mode. The major components of Zingiber under investigation namely: (1) Pentadecanoic acid (2) 1,3-Dioxepane, 2-pentadecyl (3) 4H-Pyran-4-one, 2,3-dihydro-3,5-dihydroxy-6-methyl (4) gingerol. Electron ionization mass spectra of these compounds have been obtained and investigated. In addition, the semi-empirical (MNDO) method was used to calculate some physical and thermochemical properties for the structural of these compounds such as total energy, electronic energy, ionization energy, heats of formation, proton affinity and dipole moments which might to predict the activity and behavior of these compounds.
Science Publishing Corporation
2016-02-03 10:11:32
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http://www.sciencepubco.com/index.php/IJPR/article/view/6052
International Journal of Physical Research; Vol. 4 No. 1 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6202
2016-09-19T11:58:31Z
IJPR:ART
nmb a2200000Iu 4500
"160614 2016 eng "
2307-9010
10.14419/ijpr.v4i2.6202
doi
dc
Solutions of Kudryashov - Sinelshchikov equation and generalized Radhakrishnan-Kundu-Lakshmanan equation by the first integral method
Subhaschandra Singh, Salam
Physics Department, Imphal College, Imphal,Manipur, India.
This paper shows the applicability of the First Integral Method in obtaining solutions of Nonlinear Partial Differential Equations (NLPDEs). The method is applied in constructing solutions of Kudryashov-Sinelshchikov equation (KSE) and Generalized Radhakrishnan-Kundu-Lakshmanan Equation (GRKLE). The First Integral Method, which is based on the Ring Theory of Commutative Algebra, is a direct algebraic method for obtaining exact solutions of NLPDEs. This method is applicable to integrable as well as nonintegrable NLPDEs. The method is an efficient method for obtaining exact solutions of many Nonlinear Evolution Equations (NLEEs).
Science Publishing Corporation
2016-06-09 06:54:41
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http://www.sciencepubco.com/index.php/IJPR/article/view/6202
International Journal of Physical Research; Vol. 4 No. 2 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6234
2016-09-19T11:58:30Z
IJPR:ART
nmb a2200000Iu 4500
"160609 2016 eng "
2307-9010
10.14419/ijpr.v4i2.6234
doi
dc
Philosophy, physics and mathematics of relative and absolute motion
Zade, Allan
Independent Researcher http://orcid.org/0000-0001-5605-3230
The idea of motion includes propagation of signals in a given medium and motion of a physical bodies (including observers) relative to the same medium. Combinations of various types of motion lead to many phenomena detectable and hidden from the observer’s point of view.
Usually, light offers the most mysterious way of motion regarding the observer. To reveal the truth and eliminate the mystery, we need to use another sophisticated way of imagination and experimentation to reach a clear view on the fundamental processes of motion despite all illusions, old ideas and wrong postulates.
Science Publishing Corporation
2016-06-09 06:54:41
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http://www.sciencepubco.com/index.php/IJPR/article/view/6234
International Journal of Physical Research; Vol. 4 No. 2 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6291
2016-09-19T11:58:31Z
IJPR:ART
nmb a2200000Iu 4500
"160719 2016 eng "
2307-9010
10.14419/ijpr.v4i2.6291
doi
dc
Modified expression for calculating refractive index of ANB8-N type binary semiconductors
Latreche, Abdelhakim
Département des sciences de la matière, Université de Bordj Bou Arreridj, 34000, Bordj Bou Arreridj, Algérie
Daoud, Salah
Laboratoire Matériaux et Systèmes Electroniques (LMSE), Université de Bordj Bou Arreridj, 34000, Algérie
In their recent work, Bahadur and Mishra proposed a new simple formula between the high-frequency refractive index and optical elec-tronegativity difference, which has been established for large number of ANB8-N type binary semiconductors (groups: I-VII, II-VI, III-V and IV-VI.). In the present work, we have improved their expression by addition a correction term in their proposed formula. The minimum average percentage deviation in the present approach reveals that the modified Bahadur relation proves its identity and soundness compared to that of Bahadur’s and others authors' relations.
Science Publishing Corporation
2016-06-09 06:54:41
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http://www.sciencepubco.com/index.php/IJPR/article/view/6291
International Journal of Physical Research; Vol. 4 No. 2 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6314
2016-09-19T11:58:31Z
IJPR:ART
nmb a2200000Iu 4500
"160904 2016 eng "
2307-9010
10.14419/ijpr.v4i2.6314
doi
dc
Characterization of cadmium sulphide (CdS) thin film deposited by spray pyrolysis technique
Dhawankar, Sachin H.
chhatrapati shivaji institute of technology, durg, chhattisgarh, india
Suryavanshi, Bhagwat. M.
Cadmium sulphide thin film is deposited on the glass slide using aqueous solution of cadmium chloride and thiourea by using spray pyrolysis deposition technique at temperature of 4000C. Structural, optical and electrical properties of deposited CdS thin film are investigated. Optical studied of CdS thin film is characterized by using UV –Visible Spectrophotometer in the visible region (380 – 1000 nm). The energy Band gap of CdS thin film is obtained in the present work at 2.3 eV. Thickness of CdS thin film is determined by using weight difference density method. Absorption coefficient and extinction coefficient of CdS thin film are studied in the present work. Structural characterization of CdS thin is done by using X-Ray diffractometer. XRD Pattern analysis showed that the CdS thin film is mixed phases of cubic and hexagonal structure. Using four probe methods the electrical resistivity and electrical conductivity of CdS thin film are studied.
Science Publishing Corporation
2016-06-09 06:54:41
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http://www.sciencepubco.com/index.php/IJPR/article/view/6314
International Journal of Physical Research; Vol. 4 No. 2 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6506
2017-05-05T06:12:06Z
IJPR:ART
nmb a2200000Iu 4500
"161213 2016 eng "
2307-9010
10.14419/ijpr.v5i1.6506
doi
dc
Growth of spray pyrolysis deposited copper oxide thin film
Dhawankar, Sachin
chhatrapati shivaji institute of technology, durg, chhattisgarh, india
Patil, Avish
govt. institute of science, nagpur, maharastra, india
Suryavanshi, Bhagwat
govt. institute of science nagpur
Tripude, Manish
E. S. Andrades of Science, Vasai, Dist Palghar- 401202 (M.S) India
Copper oxide thin film is deposited on the glass slide using aqueous solution of copper chloride and hydrogen peroxide by using spray pyrolysis deposition technique. The deposited CuO thin film is adherence and homogeneity with high transparency in visible region. Investigation of CuO thin film for physical properties is done. By using UV –Visible Spectrophotometer optical properties like absorption, transmission, energy band gap, Absorption coefficient and extinction coefficient in the visible region (380 – 1000 nm) are studied. The X-ray diffraction of CuO thin film is polycrystalline in nature with monoclinic crystal structure. The resistivity of Cuo thin film is studied using four probe methods.
Science Publishing Corporation
2016-12-13 12:45:06
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http://www.sciencepubco.com/index.php/IJPR/article/view/6506
International Journal of Physical Research; Vol. 5 No. 1 (2017)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6530
2016-09-19T11:58:31Z
IJPR:ART
nmb a2200000Iu 4500
"160827 2016 eng "
2307-9010
10.14419/ijpr.v4i2.6530
doi
dc
Variational iteration method for studying perihelion precession and deflection of light in General Relativity
Shchigolev, V.K.
Department of Theoretical Physics, Ulyanovsk State University
A new approach in studying the planetary orbits and deflection of light in General Relativity (GR) by means of the Variational iteration method (VIM) is proposed in this paper. For this purpose, a brief review of the nonlinear geodesic equations in the spherical symmetry spacetime and the main ideas of VIM are given. The appropriate correct functionals are constructed for the geodesics in the spacetime of Schwarzschild, Reissner-Nordström and Kiselev black holes. In these cases, the Lagrange multiplier is obtained from the stationary conditions for the correct functionals. Then, VIM leads to the simple problem of computation of the integrals in order to obtain the approximate solutions of the geodesic equations. On the basis of these approximate solutions, the perihelion shift and the light deflection have been obtained for the metrics mentioned above.
Science Publishing Corporation
2016-06-09 06:54:41
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http://www.sciencepubco.com/index.php/IJPR/article/view/6530
International Journal of Physical Research; Vol. 4 No. 2 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6588
2016-09-21T12:38:12Z
IJPR:ART
nmb a2200000Iu 4500
"160919 2016 eng "
2307-9010
10.14419/ijpr.v4i2.6588
doi
dc
Investigation of exact traveling wave solution for the (2+1) dimensional nonlinear evolution equations via modified extended tanh-function method
Kumar, Dipankar
Assistant Professor
Sarker, Prodip
Lecturer
Array
In this study, we have implemented the modified extended tanh-function method to obtain the exact travelling wave solutions for the general (2+1)-dimensional nonlinear evolution equations. By using this method, some travelling wave solutions are successfully obtained and which have been expressed by the trigonometric, hyperbolic and rational functions. These obtained solutions are an appropriate and desirable for instructive specific nonlinear physical phenomena in genuinely nonlinear dynamical systems. The method is an efficient and reliable mathematical tool for solving many nonlinear evolution equations arising in science and engineering problems.
Science Publishing Corporation
2016-06-09 06:54:41
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http://www.sciencepubco.com/index.php/IJPR/article/view/6588
International Journal of Physical Research; Vol. 4 No. 2 (2016)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/6961
2017-05-05T06:12:06Z
IJPR:ART
nmb a2200000Iu 4500
"161215 2016 eng "
2307-9010
10.14419/ijpr.v5i1.6961
doi
dc
Quasi-linear correlation between high-frequency and static die-lectric constants in II-VI and III-V semiconductors
Daoud, Salah
Laboratory of Materials and Electronic Systems (LMSE), Faculty of Sciences and Technology, Mohamed Elbachir El Ibrahimi, Bordj Bou Arreridj University, Bordj Bou Arreridj (34000), Algeria
Bencheikh, Abdelhalim
Département des Sciences et techniques, Université Mohamed Elbachir El Ibrahimi de Bordj Bou Arreridj, Bordj Bou Arreridj (34000), Algérie
Belagraa, Laarbi
Civil Engineering Department, LMMS Laboratory, Mohamed Boudiaf , M'sila University, M’sila (28000) Algeria
A quantitative form of the linear correlation between the high-frequency and static dielectric constants in ANB8-N (N = 2, 3) tetrahedrally coordinated semiconductor materials, and also in I-VII group alkali halides was studied. So, a quasi-linear relationship was found between the high-frequency and the static dielectric constants for some selected II-VI (ZnS, ZnSe, ZnTe and CdTe) and III-V (AlP, AlAs, AlSb,….etc) cubic zincblende type materials, in the other side a weak uphill linear relationship has been found in the case of I-VII (LiF, NaF, LiCl,….etc) group alkali halides compounds. In the case of II-VI and III-V cubic zincblende semiconductors, the linear regression is established with a correlation coefficient ( ) of about 0.98. The significance of the linear regression is given as the probability P <0.0001 of the null hypothesis.
Science Publishing Corporation
2016-12-13 12:45:06
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International Journal of Physical Research; Vol. 5 No. 1 (2017)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7013
2017-05-05T06:12:06Z
IJPR:ART
nmb a2200000Iu 4500
"161225 2016 eng "
2307-9010
10.14419/ijpr.v5i1.7013
doi
dc
Sound velocities and Debye temperature of BeSe under high pressure up to 50 GPa
Daoud, Salah
Laboratory of Materials and Electronic Systems (LMSE), Faculty of Sciences and Technology, Mohamed Elbachir El Ibrahimi, Bordj Bou Arreridj University, Bordj Bou Arreridj (34000), Algeria
The mechanical behavior, sound velocities and Debye temperature of beryllium-selenide (BeSe) semiconductor under pressure up to 50 GPa have been estimated using the structural parameters and elastic constants of Fanjie Kong and Gang Jiang (Physica B 404 (2009) 3935-3940). The Pugh ratio, the directional dependence of elastic wave velocity, the longitudinal, transverse and average sound velocities, and the Debye temperature are successfully predicted and analyzed in comparison with the available theoretical data. The analysis of the Pugh ratio indicates that this compound is prone to brittle behavior. Our obtained results of the longitudinal, transverse and average sound velocities at high pressure indicate that these of Kong and Jiang (Physica B 404 (2009) 3935-3940) are not correctly predicted.
Science Publishing Corporation
2016-12-13 12:45:06
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International Journal of Physical Research; Vol. 5 No. 1 (2017)
eng
Copyright (c) 2016 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7065
2017-05-05T06:12:06Z
IJPR:ART
nmb a2200000Iu 4500
"170111 2017 eng "
2307-9010
10.14419/ijpr.v5i1.7065
doi
dc
Forward current-voltage characteristics simulation of 4H-SiC silicon carbide Schottky diode for power electronics
Rybalka, S.B.
Bryansk State Technical University
Krayushkina, E.Yu.
Demidov, A.A.
Shishkina, O.A.
Surin, B.P.
Forward current-voltage characteristics of 4H-SiC Schottky diode with Ni Schottky contact have been simulated based on in the physical analytical models based on Poisson’s equation, drift-diffusion and continuity equations. On the base of analysis of current-voltage characteristics in terms of classical thermionic emission theory it is established that the proposed simulation model of Schottky diode corresponds to the “ideal†diode with average ideality factor n»1.1 at low temperature ~300 K. It is determined that effective Schottky barrier height equals 1.1 eV for Ni/4H-SiC Schottky diode.
Science Publishing Corporation
2016-12-13 12:45:06
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International Journal of Physical Research; Vol. 5 No. 1 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7093
2017-05-05T06:12:06Z
IJPR:ART
nmb a2200000Iu 4500
"170123 2017 eng "
2307-9010
10.14419/ijpr.v5i1.7093
doi
dc
Thermal properties of cubic zincblende thallium-phosphide from quasi-harmonic Debye model approximation
Daoud, Salah
The thermal properties of cubic zincblende (B3) thallium - phosphide (TlP) compound under high pressure up to 12 GPa have been studied using the quasi-harmonic Debye model approximation. The relative unit cell volume, the isothermal bulk modulus, the first order derivative isothermal bulk modulus, the Debye temperature and the Grüneisen parameter are studied at zero-temperature and at standard ambient temperature (298 K) respectively. Our obtained values of the different previous quantities are in general in agreement compared to other theoretical data of the literature.
Science Publishing Corporation
2016-12-13 12:45:06
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http://www.sciencepubco.com/index.php/IJPR/article/view/7093
International Journal of Physical Research; Vol. 5 No. 1 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7288
2017-05-05T06:12:06Z
IJPR:ART
nmb a2200000Iu 4500
"170225 2017 eng "
2307-9010
10.14419/ijpr.v5i1.7288
doi
dc
Non topological 1-soliton solution to resonant nonlinear schrodinger equation with kerr law nonlinearity
Subhaschandra Singh, Salam
Physics Department, Imphal College, Imphal,Manipur, India.
In this paper, using the methods of ansatz, sine-cosine and He’s semi-inverse variation, non-topological 1-soliton solution to Resonant Nonlinear Schrodinger Equation with Kerr law nonlinearity is obtained. The results show that these methods are very effective ones for finding exact solutions to various types of nonlinear evolution equations appearing in the studies of science and engineering.
Science Publishing Corporation
2016-12-13 12:45:06
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International Journal of Physical Research; Vol. 5 No. 1 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7429
2017-05-05T06:12:06Z
IJPR:ART
nmb a2200000Iu 4500
"170330 2017 eng "
2307-9010
10.14419/ijpr.v5i1.7429
doi
dc
A variety of exact analytical solutions of extended shallow water wave equations via improved (G’/G) -expansion method
Hawlader, Faisal
Bangabandhu Sheikh Mujibur Rahman Science and Technology University Gopalganj-8100, Bangladesh
Kumar, Dipankar
Bangabandhu Sheikh Mujibur Rahman Science and Technology University,Gopalganj-8100,Bangladesh
In this present work, we have established exact solutions for (2+1) and (3+1) dimensional extended shallow-water wave equations in-volving parameters by applying the improved (G’/G) -expansion method. Abundant traveling wave solutions with arbitrary parameter are successfully obtained by this method, and these wave solutions are expressed in terms of hyperbolic, trigonometric, and rational functions. The improved (G’/G) -expansion method is simple and powerful mathematical technique for constructing traveling wave, solitary wave, and periodic wave solutions of the nonlinear evaluation equations which arise from application in engineering and any other applied sciences. We also present the 3D graphical description of the obtained solutions for different cases with the aid of MAPLE 17.
Science Publishing Corporation
2016-12-13 12:45:06
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application/vnd.openxmlformats-officedocument.wordprocessingml.document
http://www.sciencepubco.com/index.php/IJPR/article/view/7429
International Journal of Physical Research; Vol. 5 No. 1 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7564
2017-05-06T05:45:33Z
IJPR:ART
nmb a2200000Iu 4500
"170505 2017 eng "
2307-9010
10.14419/ijpr.v5i1.7564
doi
dc
Assesment and evaluation of excess lifetime cancer risk for Occupants of university of Uyo permanent campus, Nigeria
Etuk, Sunday
University of Uyo, Uyo, Akwa Ibom State, Nigeria
Antia, Akaninyene
University of Uyo, Uyo, Akwa Ibom State, Nigeria
Agbasi, Okechukwu
University of Uyo, Uyo, Akwa Ibom State, Nigeria
This paper presents the results of ambient radioactive radiation, radiation health hazard indices and excess lifetime cancer risk estimation within University of Uyo campus, Use Offot, Uyo, Niger Delta region of Nigeria. Mean annual outdoor and indoor equivalent doses of 0.284mSv/yr. and 0.854mSv/yr. respectively were recorded, being less than 1mSv/yr. maximum recommended limit for general public. Mean annual outdoor and indoor effective doses of 0.174mSv/yr. and 0.645mSv/yr. respectively with a total of 0.819mSv/yr. were computed. The mean outdoor and indoor ELCR values of 0.61x10-3 and 2.26 x 10-3 respectively, with a mean total of 2.87 x 10-3 were also computed. The results though higher than the world’s average, are comparable with those of some other locations within the Niger Delta region.
Science Publishing Corporation
2016-12-13 12:45:06
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http://www.sciencepubco.com/index.php/IJPR/article/view/7564
International Journal of Physical Research; Vol. 5 No. 1 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7780
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"170627 2017 eng "
2307-9010
10.14419/ijpr.v5i2.7780
doi
dc
Detection and analysis of human hemoglobin HB and HBO2 with new Nano-sensor based on chiral metamaterials
Zinelabiddine, Mezache
University Constantine 1
ZARA, Chemseddine
University of Brothers’ Mentouri Constantine 1
LARIOUI, Fateh
University of Brothers’ Mentouri Constantine 1
Benabdelaziz, Fatiha
University of Brothers’ Mentouri Constantine 1
This article is devoted to the simulation COMSOL Multiphysics of ultra-sensitive nano-sensor based on chiral Metamaterials, which allows us to follow hemolysis with good accuracy. Where we will study the reflected wave in human hemoglobin oxygenated and deoxygenated to determine its concentration. In this paper we also present the numerical results and the equations of variations obtained by Matlab.
Science Publishing Corporation
2017-06-27 19:41:55
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/7780
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7795
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"170629 2017 eng "
2307-9010
10.14419/ijpr.v5i2.7795
doi
dc
Bright and dark 1– soliton solutions to perturbed Schrodinger – hirota equation with power law nonlinearity via semi – inverse variation method and ansatz method
Subhaschandra Singh, S.
Physics Department, Imphal College, Imphal,Manipur, India.
This paper studies perturbed Schrodinger Hirota equation with power law nonlinearity by obtaining its 1 – soliton solutions via He’s semi – inverse variation method and the Ansatz method and the results reveal that these methods are very effective ones for obtaining exact solutions to various types of nonlinear evolution equations appearing in the studies of science and engineering.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/7795
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/7910
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"170806 2017 eng "
2307-9010
10.14419/ijpr.v5i2.7910
doi
dc
Optical properties and electronic polarizability of boron-antimonide semiconductor
Daoud, Salah
Latreche, Abdelhakim
The high-frequency and static dielectric constants, the reflex index, the total optical electronegativity difference, the bulk modulus, the micro-hardness, the plasmon energy and the electronic polarizability of cubic zincblende boron-antimonide semiconductor have been estimated by using some empirical formulas. These parameters are analyzed by comparing them against the available experimental and theoretical data. In general, our obtained results agree well with other theoretical data from the literature.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/7910
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8042
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"170820 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8042
doi
dc
A single hybrid parameter-based model for calibrating hargreaves-samani coefficient in Nigeria
Nwokolo, Samuel
University of Calabar
Ogbulezie, Julie
University of Calabar
The present research was designed to locally calibrate Hargreaves-Samani computing model (HS) in twenty-one (21) locations with their corresponding coastal and interior regions in Nigeria employing a single hybrid parameter-based model to obtain the adjusted Hargreaves-Samani coefficient (AHC) for Nigerian environment. To achieve this purpose, meteorological parameters such as extraterrestrial solar radiation, maximum sunshine duration, minimum and maximum temperatures were employed as input parameters to compute the original HS model and equally calibrate the original HS model. The monthly AHCs were obtained by multiplying the 0.17 by the monthly ratio of the observed global solar radiation (H) to H calculated from original HS model. The average value was obtained per station. These observed AHC values were considered as the target values for the development of hybrid parameter-based models (HP) for every station used for calibrating original HS model. On the whole, the result from the statistical indicators confirmed that the locally calibrated HS model performed better than the original HS model in all stations (including coastal and interior regions) investigated. Both the original and calibrated HS models underestimated H at annual timescale, but the calibrated HS model provided closer average values with H, which could confirm the good performances of the calibrated HS model. Therefore, the calibrated HS model obtained in this research could be highly recommended for estimating H in Nigeria when only temperature data are available.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8042
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8084
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"170817 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8084
doi
dc
Fundamental physics and the fine-structure constant
Sherbon, Michael
Independent http://orcid.org/0000-0001-9720-8008
From the exponential function of Euler’s equation to the geometry of a fundamental form, a calculation of the fine-structure constant and its relationship to the proton-electron mass ratio is given. Equations are found for the fundamental constants of the four forces of nature: electromagnetism, the weak force, the strong force and the force of gravitation. Symmetry principles are then associated with traditional physical measures.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8084
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8160
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"170916 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8160
doi
dc
A critical review of theoretical models for estimating global so-lar radiation between 2012-2016 in Nigeria
Nwokolo, Samuel
University of Calabar
Ogbulezie, Julie
University of Calabar
A routinely research of solar radiation is of vital requirement for surveys in agronomy, hydrology, ecology and sizing of the photovoltaic or thermal solar systems, solar architecture, molten salt power plant and supplying energy to natural processes like photosynthesis and estimates of their performances. However, measurement of global solar radiation is not available in most locations across in Nigeria. During the past 5 years in order to estimate global solar radiation on the horizontal surface on both daily and monthly mean daily basis, numerous empirical models have been developed for several locations in Nigeria. As a result, various input parameters have been utilized and different functional forms used. In this study aims at comparing, classifying and reviewing the empirical and soft computing models applied for estimating global solar radiation. The empirical models so far utilized were classified into eight main categories and presented based on the input parameters employed. The models were further reclassified into several main sub-classes and finally represented according to their developing year. On the whole, 145 empirical models and 42 functional forms, 8 artificial neural network models, 1 adaptive neural fuzzy inference system approach, and 1 Autoregressive Moving Average methods were recorded in literature for estimating global solar radiation in Nigeria. This review would provide solar-energy researchers in terms of identifying the input parameters and functional forms widely employed up until now as well as recognizing their importance for estimating global solar radiation using soft computing empirical models in several locations in Nigeria.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8160
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8312
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"171010 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8312
doi
dc
Modeling the influence of cloudiness on diffuse horizon-tal irradiation under various sky conditions in Nigeria
Nwokolo, Samuel
University of Calabar
Ogbulezie, Julie
University of Calabar
In this study, modeling the influence of cloudiness on diffuse horizontal irradiation (DHI) in six tropical ecological zones in Nigeria (Latitude 4.75-13.067oN and Longitude 3.333-13.16oE) using 22-year data (July 1983- June 2005) was analysed for all sky and clear sky conditions. The result revealed that the absorption of DHI in the global horizontal irradiation (GHI) portion of the solar spectrum is greatly enhanced in the Southern tropical zones as a result of heavy presence of smog, cloudiness, and high water vapour parameters such as relative humidity, dew point temperature and precipitable water thereby increasing the diffuse fraction in the zone. However, in the Northern tropical zones, the absorption of DHI in the GHI portion of the solar spectrum lowered due to presence of low smog, cloudiness and low water vapour parameters thereby reducing the diffuse fraction in the region. The quadratic regression correlation model developed deeming from the model performance test indicates that the proposed model could be used to estimate DHI accurately over the six tropical ecological zones in Nigeria and other locations with comparable sky condition to Nigeria.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8312
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8314
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"171007 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8314
doi
dc
Correlation study of optical, mechanical and thermal properties of BAs material and its experimental energy gap
Daoud, Salah
Laboratory of Materials and Electronic Systems (LMSE), Faculty of Sciences and Technology, Mohamed Elbachir El Ibrahimi, Bordj Bou Arreridj University, Bordj Bou Arreridj (34000), Algeria.
The object of this work is to study the correction between the optical, mechanical and thermal properties of boron arsenide (BAs) material and its experimental optical energy gap. The index of refraction, the high-frequency dielectric constant, the optical electronegativity, the bulk modulus, the micro-hardness, the plasmon energy, the Debye temperature, the melting temperature and the electronic polarizability of BAs were estimated from its energy gap. The results obtained are analyzed in comparison with available experimental and other theoretical data. My obtained results of the reflective index and the dielectric constant agree well with other theoretical data; whereas the bulk modulus, the microhardness, the Debye temperature, and the melting temperature are slightly lower than the experimental and other theoretical data. The electronic polarizability is slightly different than other theoretical ones from the literature.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8314
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8327
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"171010 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8327
doi
dc
Assessment of wind energy resources in Nigeria – a case study of north-western region of Nigeria
Olomiyesan, Boluwaji
National Examinations Council, Minna, Niger State, Nigeria
Oyedum, Onyedi
Federal university of Technology, Minna, nigeria
Ugwuoke, Paulinus
National Centre for Energy Research and Development, University of Nigeria, Nsukka.
Abolarin, Matthew
Federal university of Technology, Minna, nigeria
This study assesses the wind-energyresources in Nigeria by reviewing the existing literature on the subject matter, and also evaluates the wind potential in six locations in the northwest region of the country. Twenty-two years’ (1984 – 2005) wind speed data obtained from the Nigerian Meteorological Agencies (NIMET) were used in this study.Weibull two-parameter and other statistical models were employed in this analysis. Wind speed distribution across Nigeria shows that some locations in the northern part of the country are endowed with higher wind potential than others in the southern part of the country. Moreover, assessment of the wind-energy resources in the study locations reveals that wind energy potential in the region is lowest in Yelwa and highest in Kano; WPD varies from 28.30 Wm-2 to 483.72Wm-2 at 10 m AGL, 45.33 Wm-2 to 775.19 Wm-2 at 30 m AGL and 56.43 Wm-2 to 964.77 Wm-2 at 50 m AGL.Thus Kano, Sokoto and Katsina are suitable for large-scale wind power generation, while Gusau is suitable for small-scale wind power generation; whereas Yelwa and Kaduna may not be suitable for wind power production because of their poor wind potential.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8327
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8385
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"171102 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8385
doi
dc
To unite nuclear and sub-nuclear strong interactions
UV, Satya Seshavatharam
I-SERVE, Hyderabad, AP, India.Sr. Engineer, QA-DIP, Lanco Industries Ltd, Tirupati, AP, India.
S, Lakshminarayana
AU, Visakapatnam, AP,
With reference to ‘reciprocal’ of the strong coupling constant and ‘reduced Compton's wavelength’ of the nucleon, we make an attempt to understand the background of nuclear charge radius, binding energy and stability.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8385
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8396
2017-11-08T07:39:17Z
IJPR:ART
nmb a2200000Iu 4500
"171101 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8396
doi
dc
New study of geometry effect on chiral metamateri-al nanostructures
Mezache, Zinelabiddine
Institue of Optics and fine mechanics, University of Ferhat Abbas Setif 1
Zara, Chemseddine
University of Brothers Mentouri Constantine 1
Larioui, Fateh
University of Brothers Mentouri Constantine 1
Benabdelaziz, Fatiha
University of Brothers Mentouri Constantine 1
In this paper, the Comsol Multiphysics version 5.0 is used to study the effect of geometric parameters on transmission of chiral metamaterial nanostructures. The angle of the chiral metamaterial element was varied to see his effect. Transmission coefficient (S21) and reflection coefficient (S11) are computed. In the case of nano chiral metamaterial structure, and depending on the application, the electromagnetic behavior can be adjusted by changing the angle of the chiral element.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8396
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8403
2017-11-09T21:23:14Z
IJPR:ART
nmb a2200000Iu 4500
"171108 2017 eng "
2307-9010
10.14419/ijpr.v5i2.8403
doi
dc
Analytical treatment for the conformable space-time fractional Benney-Luke equation via two reliable methods
Ali, Khalid K.
Mathematics Dept., Al-Azhar University, Nasr-City, Cairo, Egypt
Nuruddeen, RahmatullahIbrahim
Mathematics Dept., Federal University Dutse, Jigawa State Nigeria
In this study, with help of the Mathematica software, we employ the Kudryashov method and the modified extended tanh expansion method with the Riccati differential equation to analytically treat the Benney-Luke equation. The Benney-Luke equation considered in this study features fractional derivatives in both the spatial and the temporal variables of the newly introduced conformable fractional derivative. We extensively examine the equation via the two methods, and we construct various structures such as the exponential functions, trigonometric functions and hyperbolic functions. Finally, we depict the graphs of all solutions.
Science Publishing Corporation
2017-06-27 19:41:55
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http://www.sciencepubco.com/index.php/IJPR/article/view/8403
International Journal of Physical Research; Vol. 5 No. 2 (2017)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8617
2021-02-19T13:52:32Z
IJPR:ART
nmb a2200000Iu 4500
"171218 2017 eng "
2307-9010
10.14419/ijpr.v6i1.8617
doi
dc
Relationship between photosynthetically active radiation with global solar radiation using empirical model over selected climatic zones in Nigeria
Chukwujindu, Nwokolo Samuel
University of Calabar
Julie C., Ogbulezie
University of Calabar
Alwell, John-Jaja Sylvia
In this study, relationship between photosynthetically active radiation (PAR) and global solar radiation (H) over selected climatic zones in Nigeria using 22-years data (July 1983 – June 2005) was analysed. Empirical model was employed as the baseline for theoretical formulation and estimation of the ratio of PAR/H over climatic zones in Nigeria. From the estimated values, the seasonal PAR/H ranged from 1.946-2.005, 1.909-1.955, 1.968-2.039, 1.987-2.060, 1.961-2.041, 1.928-1.984 and 1.946-2.005 in rainy season, and the high values were due to low influence from clearness index, harmattan dust and pyrogenic aerosols from regional biomass burning compared with 1.906-1.923, 1.905-1.917, 1.927-1.952, 1.950-1.999, 1.971-1.985 and 1.889-1.923 recorded in dry season as a result of combined high influence from cloudiness, pyogenic aerosols and harmattan dust with annual mean values of 1.943, 1.921, 1.975, 2.007, 1.986 and 1.936 for Ilorin, Sokoto, Abeokuta, Port Harcourt, Enugu and Gusau respectively. The annual ratio of PAR/H revealed that there is an evidence increase of the values from North-East (Gusau) to South-South (Port Harcourt). These variations were mainly due to trends in cloudiness and associated atmospheric moisture with the movement of the Hadley cell circulation system along the equatorial line. From the analysed results, the model was found suitable and meteorologically reliable to estimate PAR/H accurately from commonly available H data when compared with results within and beyond tropical locations in Nigeria.
Science Publishing Corporation
2017-12-18 11:59:04
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International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8664
2021-02-19T13:52:32Z
IJPR:ART
nmb a2200000Iu 4500
"180312 2018 eng "
2307-9010
10.14419/ijpr.v6i1.8664
doi
dc
Preparation of poly methyl methacrylate thin film by solution casting method to study its ultrasonic velocity
Kale, M. A.
Dr. Babasaheb Ambedkar College of Engineering & Research, Nagpur
A. Kale, Rashmi
Polymers are long chain giant organic molecules are assembled from many smaller molecules called monomers. The work reflects the preparation of poly methyl methacrylate thin film by solution casting method. The XRD of PMMA/ZrO2 polymer is taken to confirm the structure and nature of material. Furthermore, it is characterized by finding the ultrasonic velocity at different concentration of ZrO2 and at different temperature keeping the frequency same.
Science Publishing Corporation
2017-12-18 11:59:04
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http://www.sciencepubco.com/index.php/IJPR/article/view/8664
International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8781
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"171228 2017 eng "
2307-9010
10.14419/ijpr.v6i1.8781
doi
dc
To fit Fermi’s weak coupling constant with three gravitational constants
UV, Satya Seshavatharam
I-SERVE, Hyderabad, AP, India.Sr. Engineer, QA-DIP, Lanco Industries Ltd, Tirupati, AP, India.
S, Lakshminarayana
AU, Visakapatnam, AP,
By considering three virtual gravitational constants assumed to be associated with gravitational, electromagnetic and strong interactions, Fermi’s weak coupling constant can be shown to be a natural manifestation of microscopic quantum gravity. As our approach is heuristic and completely different from the current methods of estimating the Newtonian gravitational constant, concerning the call of ‘Ideas lab 2016’ organized by NSF, we appeal for inclusion of this theoretical work as a project under the unification scheme. Estimated magnitudes of Fermi’s weak coupling constant and Newtonian gravitational constant are 1.44021X10(-62) J.m3 and 6.679856X10(-11) m3/kg/sec2 respectively.
Science Publishing Corporation
2017-12-18 11:59:04
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http://www.sciencepubco.com/index.php/IJPR/article/view/8781
International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2017 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/8795
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180117 2018 eng "
2307-9010
10.14419/ijpr.v6i1.8795
doi
dc
Atomic force microscopy analysis of alkali textured silicon substrates for solar cell applications
Fashina, Adebayo
Tubman University
Adama, Kenneth
Federal University, Ndufu-Alike Ikwo
Abdullah, Lookman
King Faisal Specialist Hospital and Research Center
Ani, Chukwuemeka
African University of Science and Technology, Abuja
Oyewole, Oluwaseun
Baze University
Asare, Joseph
Baze University
Anye, Vitalis
Nile University of Nigeria
In this paper, the surface morphology of textured silicon substrates is explored. Prior to the surface morphology analysis, textured silicon substrates were obtained by KOH anisotropic texturing of polished silicon wafers. This was achieved by investigating of the dependence surface texturing on the process parameters; etchant concentration, etching time and temperature. The surface morphology of the textured silicon samples was obtained using atomic force microscopy that was operated in the tapping mode. The resulting atomic force microscopy (AFM) images were analyzed using the Nanoscope and Gwyddion software packages. The AFM analysis revealed more surface details such as the depth, roughness, section, and step height analysis. The analysis was limited to a length scale of a few micrometers, which carefully reveals the number of individualities of the initial stages of pyramid growth. The average roughness was found to be 593nm for an optimally textured silicon wafer. The implications of the study are then discussed for potential light trapping application in silicon solar cells.
Science Publishing Corporation
2017-12-18 11:59:04
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http://www.sciencepubco.com/index.php/IJPR/article/view/8795
International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/9053
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180212 2018 eng "
2307-9010
10.14419/ijpr.v6i1.9053
doi
dc
Performance evaluation of Weibull function for wind data analysis in two selected locations in North-Western, Nigeria
Olomiyesan, Boluwaji
National Examinations Council, Minna, Niger State, Nigeria
In this study, the predictive ability of two-parameter Weibull distribution function in analyzing wind speed data was assessed in two selected sites with different mean wind speeds in the North-Western region of Nigeria. Twenty-two years wind speed data spanning from 1984 to 2005 was used in the analysis. The data were obtained from the Nigerian Meteorological Agency (NIMET) in Lagos. The results of the analysis show that Weibull function is suitable for analyzing measured wind speed data and in predicting the wind-power density in both locations and that Weibull function is not discriminative between locations with high and low mean wind speeds in analyzing wind data. The annual mean wind speeds for the two sites (Sokoto and Yelwa) are 7.99 ms-1 and 2.59 ms-1 respectively, while the annual values of the most probable wind speed and the maximum, energy-carrying wind speeds are respectively:3.52 and 4.34 ms-1 for Yelwa and 8.33 and 9.02 ms-1 for Sokoto. The estimated annual wind power densities for Yelwa and Sokoto are respectively 36.91 and 359.96 Wm-2. Therefore, Sokoto has a better prospect for wind power generation.
Science Publishing Corporation
2017-12-18 11:59:04
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/9053
International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/9260
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180226 2018 eng "
2307-9010
10.14419/ijpr.v6i1.9260
doi
dc
A comparative study of 2d nanostructureds chiral photonic crystal connected and disconnected in terahertz (THZ) re-gime
Zinelabiddine, Mezache
Institue of Optics and fine mechanics, University of Ferhat Abbas Setif 1
Benabdelaziz, Fatiha
Department of Electronics, University of Brothers Mentouri Constantine 1
Seghaouil, Samir
University of Brothers Mentouri Constantine 1
Chaibi, Walid
University of Brothers Mentouri Constantine 1
The 2D nanostructureds Chiral Photonic Crystal (CPC) connected and disconnected in terahertz (THz) regime, on silicon oxide SiO2 substrates, are comparatively studied via Comsol Multiphysics 5.0. Where properties of this nanostructureds are discussed based on transmission coefficient (S21) and reflection coefficient (S11).
Science Publishing Corporation
2017-12-18 11:59:04
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/9260
International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/9261
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180225 2018 eng "
2307-9010
10.14419/ijpr.v6i1.9261
doi
dc
New exact solutions of the combined and double combined sinh-cosh-Gordon equations via modified Kudryashov method
Joardar, Atish Kumar
Department of Mathematics, Islamic University, Kushtia--7003, Bangladesh.
Kumar, Dipankar
Department of Mathematics, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj--8100, Bangladesh.
Woadud, K. M. Abdul Al
Department of Electrical \ Electronic Engineering, Uttara University, Dhaka, Bangladesh.
The combined and double combined sinh-cosh-Gordon equations are very important to a wide range of various scientific applications that ranges from chemical reactions to water surface gravity waves. In this article, with the assistance of a function transform and Painlevè property, the nonlinear combined and double combined sinh-cosh-Gordon equations turn into ordinary differential equations. Later on, modified Kudryashov method is adopted for investigating new analytical solution of the studied equations. As a consequence, a series of new analytical solutions are acquired and we demonstrated the actual behavior of the achieved solutions of the mentioned equations with the aid of 3D and 2D MATLAB graphs. Finally, we also validate the effectiveness of the modified Kudryashov method for the problem of extracting new exact solutions of the combined and double combined sinh-cosh-Gordon equations with the aid of Maple package program. It is shown that the implemented method is capable to extract new solutions and it can also use to other nonlinear partial differential equation (NLPDE's) arising in mathematical physics or other applied field.
Science Publishing Corporation
2017-12-18 11:59:04
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http://www.sciencepubco.com/index.php/IJPR/article/view/9261
International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/9633
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180505 2018 eng "
2307-9010
10.14419/ijpr.v6i1.9633
doi
dc
Comparative study on different types of photovoltaic modules under outdoor operating conditions in Minna, Nigeria
Ezenwora, Joel A.
Department of Physics, Federal University of Technology, Minna, Nigeria.
Oyedum, David O.
Department of Physics, Federal University of Technology, Minna, Nigeria.
Ugwuoke, Paulinus E.
National Centre for Energy Research and Development, University of Nigeria, Nsukka, Nigeria.
There is need to always obtain the realistic outdoor performance variables of Photovoltaic (PV) module in a location for efficient PV power system sizing and design. Outdoor performance evaluation was carried out on three types of commercially available silicon PV modules rated 10 W each, using CR1000 software-based Data Acquisition System (DAS). The PV modules under test and meteorological sensors were installed on a metal support structure at the same test plane.The data monitoring was from 08.00 to 18.00 hours each day continuously for a period of one year, from December 2014 to November 2015. Maximum values of module efficiencies of 5.86% and 10.91% for the monocrystalline and polycrystalline modules were respectively recorded at irradiance of 375 W/m2, while the amorphous efficiency peaked at 3.61 % with irradiance of 536.5 W/m2. At 1000 W/m2 the efficiencies reduced to 3.30 %, 6.20 % and 2.25 % as against manufacturer’s specifications of 46 %, 48 % and 33 % for the monocrystalline, polycrystalline and amorphous modules respectively. The maximum power output achieved for the modules at irradiance of 1000 W/m2 were 0.711 W, 1.323 W and 0.652 W for the monocrystalline, polycrystalline and amorphous PV modules, respectively. Accordingly, Module Performance Ratios for the PV modules investigated were 0.07, 0.13 and 0.07, respectively. The rate of variation of module response variables with irradiance and temperature was determined using a linear statistical model given as Y= a + bHg+ c Tmod. The approach performed creditably when compared with measured data.
Science Publishing Corporation
2017-12-18 11:59:04
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http://www.sciencepubco.com/index.php/IJPR/article/view/9633
International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/10754
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180605 2018 eng "
2307-9010
10.14419/ijpr.v6i1.10754
doi
dc
Equation of state and some other properties of rock-salt AlN
Daoud, Salah
Mezouar, Rabie
Benmakhlouf, Abdelfateh
The object of the present work is to study the equation of state (EOS) and the temperature dependence of the vibrational constant pressure heat capacity, the adiabatic bulk modulus Bs and the pressure derivative of the isothermal bulk modulus of cubic rock-salt Aluminum nitride under high pressure up to 100 GPa. In addition, the isothermal bulk modulus and the Debye temperature θD versus pressure at 1800 K are presented. Some structural and thermophysical properties used here are taken from our previous paper published in J. Electron. Mater. (2018) DOI: 10.1007/s11664-018-6169-x. The results obtained are analyzed and compared with other data of the literature.
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Science Publishing Corporation
2017-12-18 11:59:04
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/10754
International Journal of Physical Research; Vol. 6 No. 1 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/11020
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180728 2018 eng "
2307-9010
10.14419/ijpr.v6i2.11020
doi
dc
Structural and piezoelectric coefficients of AlP under pressure
Daoud, Salah
Mezouar, Rabie
Benmakhlouf, Abdelfateh
The present work aims to investigate the structural parameters and the piezoelectric coefficients of cubic zinc-blende Aluminum phosphide (AlP) under high pressure up to 21 GPa, using plane wave-pseudopotential (PW-PP) approach in the framework of the density functional theory (DFT) and the density functional perturbation theory (DFPT) with the generalized gradient approximation (GGA) for the exchange-correlation functional. The results obtained are analyzed and compared with other data of the literature. The structural parameters and the piezoelectric coefficients calculated here agree well with other data of the literature. We found also that both the direct and converse piezoelectric coefficients increase with increasing pressure up to 21 GPa.
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Science Publishing Corporation
2018-07-28 08:22:51
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http://www.sciencepubco.com/index.php/IJPR/article/view/11020
International Journal of Physical Research; Vol. 6 No. 2 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/13805
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180728 2018 eng "
2307-9010
10.14419/ijpr.v6i2.13805
doi
dc
The study of transparent conducting gallium doped ZnO thin films in order to use in solar cells
Mahmoudzadeh Pirvahshi, Mojtaba
Department of Physics, Saravan Branch, Islamic Azad University, Saravan, Iran
In this study, transparent conducting Ga-doped ZnO thin films were deposited on glass substrate using chemical spray pyrolysis technique. The effect of Ga-doping concentration (0, 1, 2 and 3 at.%) on microstructural, optical and electrical characteristics of layers have been investigated. The studies of X-ray diffraction and optical transmission spectra show these films have a hexagonal wurtzite structure with (002) preferred growth direction, also a high transmission of 85-95% in visible range. Data analysis show that the band gap energies in these films are varying in the range of 3.27-3.33 eV, consistent with the Burstein-Moss shift effect, with Urbach tail widths between 114-160 meV. The 2 wt% Ga sample showed the maximum figure of merit (3×10-2Ω-1), with an electron concentration and sheet resistance of ~1.42×1019 cm-3 and 13 kΩ/square, respectively.
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Science Publishing Corporation
2018-07-28 08:22:51
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http://www.sciencepubco.com/index.php/IJPR/article/view/13805
International Journal of Physical Research; Vol. 6 No. 2 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/13829
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"180728 2018 eng "
2307-9010
10.14419/ijpr.v6i2.13829
doi
dc
Dark and singular soliton solutions of perturbed Gerdjikov-Ivanov equation via the first integral method
Subhaschandra Singh, Salam
Physics Department, Imphal College, Imphal,Manipur, India.
This paper employs the first integral method in obtaining dark and singular soliton solutions of perturbed Gerdjikov-Ivanov equation showing that the method is a powerful tool for finding exact solutions of many nonlinear evolution (NLE) equations which are found in the studies of social dynamics, nonlinear science and engineering.
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Science Publishing Corporation
2018-07-28 08:22:51
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http://www.sciencepubco.com/index.php/IJPR/article/view/13829
International Journal of Physical Research; Vol. 6 No. 2 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/15846
2021-02-19T13:52:33Z
IJPR:ART
nmb a2200000Iu 4500
"181223 2018 eng "
2307-9010
10.14419/ijpr.v6i2.15846
doi
dc
Estimation of the earth's albedo over some selected area the Republic of Chad
Marouf BARKA, Zakaria
université des montagnes
Lealea, Théophile
University of Dschang,Dschang
Tchinda, Rene
University of Dschang,Dschang
Surface albedo is one parameter of the climate variables. It influences the surface radiation budget for a given site. The availability of surface albedo data at both temporally and spatially levels are needed. In the lack of ground recorded values of albedo, we have to estimate surface albedo from the climatic variables. The model generated in this study enables the continuous observation of land surface albedo through relative model established from the multivariate regression method. From satellite recorded data, we estimate the ground surface albedo for some selected sites. The result were satisfactory with the root mean square error (RMSE) is 0.035. The Mean Absolute Error (MAE) was computed and indicated to be as low as 0.027 and mean absolute percentage error (MAPE) is 7.58.
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Science Publishing Corporation
2018-07-28 08:22:51
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http://www.sciencepubco.com/index.php/IJPR/article/view/15846
International Journal of Physical Research; Vol. 6 No. 2 (2018)
eng
Copyright (c) 2018 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/19984
2019-11-05T03:30:47Z
IJPR:ART
nmb a2200000Iu 4500
"190825 2019 eng "
2307-9010
10.14419/ijpr.v7i2.19984
doi
dc
Application of the extended exp(-φ(ξ))-expansion method to the nonlinear conformable time-fractional partial differential equations
Kumar, Dipankar
Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj-8100.
Chandra Ray, Samir
This paper investigates the new exact solutions of the three nonlinear time fractional partial differential equations namely the nonlinear time fractional Clannish Random Walker’s Parabolic (CRWP) equation, the nonlinear time fractional modified Kawahara equation, and the nonlinear time fractional BBM-Burger equation by utilizing an extended form of exp(-φ(ξ))-expansion method in the sense of conformable fractional derivative. As outcomes, some new exact solutions are obtained and signified by hyperbolic function solutions, trigonometric function solutions, and rational function solutions. Some solutions have been plotted by MATLAB software to show the physical significance of our studied equations. In the point of view of our executed method and generated results, we may conclude that extended exp (-φ(ξ))-expansion method is more efficient than exp(-φ(ξ))-expansion method to extract the new exact solutions for solving any types of integer and fractional differential equations arising in mathematical physics.
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Science Publishing Corporation
2019-07-21 14:55:45
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http://www.sciencepubco.com/index.php/IJPR/article/view/19984
International Journal of Physical Research; Vol. 7 No. 2 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/22775
2019-05-27T09:04:01Z
IJPR:ART
nmb a2200000Iu 4500
"190505 2019 eng "
2307-9010
10.14419/ijpr.v7i1.22775
doi
dc
Is there a possibility of perovskite taking over the solar technology market by 2030?
O.Fashina, Adebayo
Tubman University
In recent time, there have been enormous advances in the development of perovskite solar cells in terms of its efficiency, rising from 3.8 percent in 2009 to 23.7 percent in 2018. This took other solar technologies over thirty years of research to accomplish. On the other hand, perovskite proffers a more affordable solution since it is potentially much cheaper to produce and relatively simple to manufacture than silicon solar cells. In spite of this great potential, perovskite solar cell technology is still in the premature stages of commercialization due to a number of concerns. Moreover, like with many new technologies, there is a difference between what works in the laboratory at small-scale and in the factory at large-scale. Thus, looking at perovskites as a material, it has the tendency to be a bit unstable at high temperature and susceptible to moisture and these could cause the decomposition of cells. The question here is: can perovskite outshine silicon solar cel1s in the next 10 years considering the successes so far and the vigorous research that is presently taking place globally?
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Science Publishing Corporation
2019-05-05 17:36:43
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/22775
International Journal of Physical Research; Vol. 7 No. 1 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/23681
2019-05-27T09:04:01Z
IJPR:ART
nmb a2200000Iu 4500
"190505 2019 eng "
2307-9010
10.14419/ijpr.v7i1.23681
doi
dc
Theoretical investigation of acoustic wave velocity of aluminum phosphide under pressure
Daoud, Salah
Bordj Bou Arreridj University
Latreche, Abdelhakim
Bordj Bou Arreridj University
Kumar Saini, Pawan
Department of Physics, Government College, Hansi, Haryana,125033,
The bulk and surface acoustic wave velocities of Aluminum phosphide (AlP) semiconducting material under pressure up to 9.5 GPa were studied. The structural parameters and the elastic constants used in this work are taken from our previous paper published in J. Optoelec-tron. Adv. M. 16, 207 (2014). The results obtained at zero-pressure are analyzed and compared with other data of the literature. In addition, the acoustic Grüneisen parameter and the Vickers and Knoop microhardness are predicted and analyzed in detail. Our calculated results are in good agreement with the experimental and other theoretical data of literature.
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Science Publishing Corporation
2019-05-05 17:36:43
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/23681
International Journal of Physical Research; Vol. 7 No. 1 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/23755
2019-11-05T03:30:47Z
IJPR:ART
nmb a2200000Iu 4500
"190825 2019 eng "
2307-9010
10.14419/ijpr.v7i2.23755
doi
dc
Analytic solutions of the chiral nonlinear schrödinger equations investigated by an efficient approach
M. Abdul Al Woadud, K.
Uttara University, Dhaka, Bangladesh.
Kumar, Dipankar
Department of Mathematics, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj-8100, Bangladesh
Jahirul Islam, Md.
Department of Electrical & Electronic Engineering, Uttara University, Dhaka-1230, Bangladesh
Imrul Kayes, Md.
Department of Electrical & Electronic Engineering, Uttara University, Dhaka-1230, Bangladesh
Kumar Joardar, Atish
Department of Mathematics, Islamic University, Kushtia-7003, Bangladesh
Array
This paper studies the chiral nonlinear Schrödinger equations, describing a central role in the developments of quantum me-chanics, particularly in the field of quantum Hall effect, where chiral excitations are known to appear. More precisely, in this paper, we acquired new exact solutions of the chiral nonlinear (1+1) and (1+2)-dimensional Schrödinger equations by using the modified Kudraysov method. As outcomes, some of the new exact traveling wave solutions for the equations above is formally produced. All solutions are plotted in the view of three-dimensional (3D) and two-dimensional (2D) line shape through the MATLAB software for investigating the real significance of the studied equations. The periodic type of solitons is generated by employing modified Kudryashov method which is different from other studied methods.
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Science Publishing Corporation
2019-07-21 14:55:45
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http://www.sciencepubco.com/index.php/IJPR/article/view/23755
International Journal of Physical Research; Vol. 7 No. 2 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/25863
2019-05-27T09:04:01Z
IJPR:ART
nmb a2200000Iu 4500
"190506 2019 eng "
2307-9010
10.14419/ijpr.v7i1.25863
doi
dc
EOS parameters and elastic properties of cubic rock-salt BP
DAOUD, Salah
Mohamed Elbachir El Ibrahimi, Bordj Bou Arreridj University
The present work aims to study the equation of state (EOS) under compression up to 100 GPa, and the elastic properties of cubic rocksalt Boron phosphide (BP) material. The EOS parameters and the elastic constants of our material of interest were predicted using plane wave-pseudopotential (PW-PP) approach in the framework of the density functional theory (DFT) and the density functional perturbation theory (DFPT) with the generalized gradient approximation (GGA) for the exchange-correlation functional. The Young modulus, the Poisson's ratio, the sound velocity, the Debye temperature and the melting temperature of the aggregate material were also presented. The results obtained are in general in good agreement compared to other data of the literature.
Science Publishing Corporation
2019-05-05 17:36:43
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http://www.sciencepubco.com/index.php/IJPR/article/view/25863
International Journal of Physical Research; Vol. 7 No. 1 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/26336
2019-05-27T09:04:01Z
IJPR:ART
nmb a2200000Iu 4500
"190505 2019 eng "
2307-9010
10.14419/ijpr.v7i1.26336
doi
dc
Geotechnical and geochemical appraisal of IFON clay, Southwestern Nigeria: Implications for industrial utilization
O, Ademila
Adekunle Ajasin University, Akungba Akoko, Ondo State, Nigeria
T. H. T, Ogunribido
Adekunle Ajasin University, Akungba Akoko, Nigeria
J. M, Abidoye
Adekunle Ajasin University, Akungba Akoko, Nigeria
Clays are geological materials of economic potential in the manufacturing and environmental industries. Geotechnical properties and geochemical composition of Ifon clay deposits in Ondo State, Nigeria were investigated with the aim of determining their economic potentials. The geotechnical investigation includes consistency limits, strength, permeability and firing tests, while, X-ray fluorescence (XRF) method was used for determination of the bulk elemental composition of the clays using standard techniques. Geotechnical appraisal of the clay deposits revealed that high proportion of clay size fractions (52.3 – 66.1%) makes the clays suitable in their natural state for industrial raw materials. Activity of the clays was found to be low at approximately 0.3 – 0.7 and classified as inactive clays. Unconfined compressive strength varies between 3.4 N/mm2 and 4.7 N/mm2 and moderate shrinkage values (≤ 12%) indicate that the clays could be used as building construction materials. Coefficient of permeability of 7.75 × 10-8 to 1.72 × 10-5 cm/sec described the clays as low to impermeable soils suitable as barrier soils. SiO2 (64.41 – 68.74%) and Al2O3 (22.98 – 28.45%) contents dominate the clay geochemistry followed by iron oxide, Fe2O3 (3.57 – 8.31%) content among other oxides in traces, imply that they originated from underlying basement rocks subjected to varying degree of weathering. Low MgO, CaO, K2O and Na2O indicate no expandable clay minerals in the clays. The clays show low heavy metal concentrations which guarantee their suitability as raw materials in chemical industries. Thus, Ifon clay deposits are suitable for the production of ceramics, refractory bricks, paper, paints, rubber and fertilizer.
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Science Publishing Corporation
2019-05-05 17:36:43
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International Journal of Physical Research; Vol. 7 No. 1 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/27700
2019-05-27T09:06:12Z
IJPR:ART
nmb a2200000Iu 4500
"190527 2019 eng "
2307-9010
10.14419/ijpr.v7i1.27700
doi
dc
Structural and microstructural study of SnS thin film semiconductor of 0.2
Ojonugwa Daniel, Thomas
ALEX EKWUEME FEDERAL UNIVERSITY NDUFU ALIKE IKWO, EBONYI STATE, NIGERIA
Essang Uno, Uno
FEDERAL UNIVERSITY OF TECHNOLOGY MINNA
Uthman Isah, Kasim
Ahmadu, Umaru
SnS semiconductor thin film of 0.20, 0.25, 0.30, 0.35, 0.40 μm were deposited using aerosol assisted chemical vapour deposition (AACV) on glass substrates and were investigated for use in a field effect transistor. Profilometry, X-ray diffraction, Scanning electron microscope and Energy dispersive X-ray spectroscopy were used to characterise the structural and microstructural properties of the SnS semiconductor. The SnS thin film was found to initially consist of a single crystal at thickness of 0.20 to 0.25μm after which it becomes polycrystalline with an orthorhombic crystal structure consisting of Sn and S elements whose composition varied with increase in thickness. The SnS film of 0.4 μm thickness shows a more uniform grain distribution and growth with a crystal size of 60.57 nm and grain size of 130.31 nm signifying an optimum for the as deposited SnS films as the larger grains reduces the number of grain boundaries and charge trap density hence allowing charge carriers to move freely in the lattice thereby causing a reduction in resistivity, increase in conductivity of the films and enhanced energy band gap which are essentially parameters for a semiconductor material for application in a field effect transistor.
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Science Publishing Corporation
2019-05-05 17:36:43
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http://www.sciencepubco.com/index.php/IJPR/article/view/27700
International Journal of Physical Research; Vol. 7 No. 1 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/28046
2021-02-19T13:54:54Z
IJPR:ART
nmb a2200000Iu 4500
"190505 2019 eng "
2307-9010
10.14419/ijpr.v7i1.28046
doi
dc
Designing anti-reflection coatings for optical surface
M. Meheretu, Getnet
Debre Tabor University
E. Gebremeskel, Sitotaw
In this paper, we have analyzed the optical properties of single and double layer antireflection coatings with the help of influential characteristics matrix formulation method in the visible electromagnetic spectrum. We have studied deeply for the glass coated with MgF_2 as a single layer coating and the spectrum analysis of double layer coatings of glass with〖 MgF〗_2-Al_2 O_3. With the aid of the algebraic mathematics and MatLab program, we have developed antireflection coating designs which leads to an enhancement of material’s ability for transmission spectrum through it. According to the result we have obtained, it clearly seen that the maximum transmission power for single layer and double layer coatings are about 97.2% which occurs at wavelength of 450 nm and 100% occurs at 324 nm, respectively. It is also observed that the minimum value recorded in transmission spectra for double layer antireflection coating is 99.83% at a wavelength of 418 nm (for normal incidence) and 400 nm (for θ=60° angle of incident). In broadly speaking, our fundamental work shows double layer antireflection coating is more convenient and feasible than single layer antireflection coating.
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Science Publishing Corporation
2019-05-05 17:36:43
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/28046
International Journal of Physical Research; Vol. 7 No. 1 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/28949
2019-11-05T03:30:47Z
IJPR:ART
nmb a2200000Iu 4500
"190722 2019 eng "
2307-9010
10.14419/ijpr.v7i2.28949
doi
dc
Design of a hybrid solar photovoltaic system for Gollis University’s administrative block, Somaliland
S. Adam, Jama
Kampala International University
A. Fashina, Adebayo
Gollis University
This work presents the design of a 100kVA hybrid solar power system for Gollis University’s administrative block, Hargeisa, Somaliland. Prior to the system design, a preliminary field work on the site was performed to essentially measure the power/energy consumption of Gollis university’s administrative block. The results from the site survey was then used to select the appropriate equipment and instrument required for the design. This was achieved by calculating the energy consumption and then sizing the solar panel, battery, inverter and charge controller. The battery back-up time analysis at full load was also carried out to determine the effectiveness of the inverter size chosen. The inverter system was modeled and simulated using the MATLAB/Simulink software package. The simulation was used to study the reliability of the size of inverter chosen for the design, since the failure of most photovoltaic systems is ascribed to inverter failures. The results from the MATLAB/Simulink simulation showed that the inverter selected for the hybrid PV system has the ability to maximize the power produced from the PV array, and to generate sinusoidal AC voltage with minimum output distortion. The results also revealed that the PV solar system can provide a back-up time of 47.47 hours. The implications of the results are then discussed before presenting the recommendations for future works.
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Science Publishing Corporation
2019-07-21 14:55:45
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http://www.sciencepubco.com/index.php/IJPR/article/view/28949
International Journal of Physical Research; Vol. 7 No. 2 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/29160
2019-11-05T03:30:47Z
IJPR:ART
nmb a2200000Iu 4500
"190722 2019 eng "
2307-9010
10.14419/ijpr.v7i2.29160
doi
dc
Empirical models for predicting global solar radiation using meteorological parameters for Sokoto, Nigeria
O. Akpootu, Davidson
Department of Physics, Usmanu Danfodiyo University Sokoto, Nigeria.
I. Tijjani, Bello
M. Gana, Usman
The performances of sunshine, temperature and multivariate models for the estimation of global solar radiation for Sokoto (Latitude 13.020N, Longitude 05.250E and 350.8 m asl) located in the Sahelian region in Nigeria were evaluated using measured monthly average daily global solar radiation, maximum and minimum temperatures, sunshine hours, rainfall, wind speed, cloud cover and relative humidity meteorological data during the period of thirty one years (1980-2010). The comparison assessment of the models was carried out using statistical indices of coefficient of determination (R2), Mean Bias Error (MBE), Root Mean Square Error (RMSE), Mean Percentage Error (MPE), t – test, Nash – Sutcliffe Equation (NSE) and Index of Agreement (IA). For the sunshine based models, a total of ten (10) models were developed, nine (9) existing and one author’s sunshine based model. For the temperature based models, a total of four (4) models were developed, three (3) existing and one author’s temperature based model. The results of the existing and newly developed author’s sunshine and temperature based models were compared and the best empirical model was identified and recommended. The results indicated that the author’s quadratic sunshine based model involving the latitude and the exponent temperature based models are found more suitable for global solar radiation estimation in Sokoto. The evaluated existing Ångström type sunshine based model for the location was compared with those available in literature from other studies and was found more suitable for estimating global solar radiation. Comparing the most suitable sunshine and temperature based models revealed that the temperature based models is more appropriate in the location. The developed multivariate regression models are found suitable as evaluation depends on the available combination of the meteorological parameters based on two to six variable correlations. The recommended models are found suitable for estimating global solar radiation in Sokoto and regions with similar climatic information with higher accuracy and climatic variability.
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Science Publishing Corporation
2019-07-21 14:55:45
application/pdf
application/msword
http://www.sciencepubco.com/index.php/IJPR/article/view/29160
International Journal of Physical Research; Vol. 7 No. 2 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/29172
2019-11-05T03:30:47Z
IJPR:ART
nmb a2200000Iu 4500
"190722 2019 eng "
2307-9010
10.14419/ijpr.v7i2.29172
doi
dc
Geoelectric evaluation of groundwater potential within sunshine garden estate, akure southwestern Nigeria
Bello, Rereloluwa
Crawford University, Nigeria
Ajayi, Toluwaleke
Crawford University, Nigeria
The Vertical Electrical Resistivity surveys in the Sunshine Garden Estate have contributed to a better understanding of the basement complex of Southwestern Nigeria. Nine (9) vertical electrical sounding (VES) using the Schlumberger electrode array were interpreted and the results shows three (3) subsurface geoelectric layers within the study area. These are the weathered layer, topsoil, fresh/fractured basement. Groundwater pockets such as fractured zones, valley fills/basement depressions, and weathered zones were delineated in the study area. Weathered/partially weathered layer and weathered basement/fractured basement were the two major aquifer mapped out and these aquifers are characterized by thick overburden, found within basement depressions. The groundwater potential of the study area was zoned into low, medium and high potentials. Zones where the overburden thickness (which constitutes the main aquifer unit) is greater than 13m and of low clay composition (average resistivity value between 200 - 400Ωm) are considered zones of high groundwater potential. Area where the thickness of the aquifer ranges from 11-13m with less clay composition are considered to have medium groundwater potential and the areas where the thickness of the aquifer is less than 11m are considered to have a low groundwater. The VES station underlained by high and medium groundwater potential zones are envisaged to be viable for groundwater development within the area.
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Science Publishing Corporation
2019-07-21 14:55:45
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http://www.sciencepubco.com/index.php/IJPR/article/view/29172
International Journal of Physical Research; Vol. 7 No. 2 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/29214
2019-11-05T03:30:47Z
IJPR:ART
nmb a2200000Iu 4500
"190722 2019 eng "
2307-9010
10.14419/ijpr.v7i2.29214
doi
dc
New temperature dependent models for estimating global solar radiation across the midland climatic zone of Nigeria
O. Akpootu, Davidson
Department of Physics, Usmanu Danfodiyo University Sokoto, Nigeria.
I. Tijjani, Bello
M. Gana, Usman
Authentic information of the availability of global solar radiation is significant to agro/hydro meteorologists, atmospheric Physicists and solar energy engineers for the purpose of local and international marketing, designs and manufacturing of solar equipment. In this study, five new proposed temperature dependent models were evaluated using measured monthly average daily global solar radiation, maximum and minimum temperature meteorological data during the period of thirty one years (1980-2010). The new models were compared with three existing temperature dependent models (Chen et al., Hargreaves and Samani and Garcia) using seven different statistical validation indicators of coefficient of determination (R2), Mean Bias Error (MBE), Root Mean Square Error (RMSE), Mean Percentage Error (MPE), t – test, Nash – Sutcliffe Equation (NSE) and Index of Agreement (IA) to ascertain the suitability of global solar radiation estimation in five different locations (Zaria, Bauchi, Jos, Minna and Yola) situated in the Midland climatic zone of Nigeria. In each location, the result shows that a new empirical regression model was found more accurate when compared to the existing models and are therefore recommended for estimating global solar radiation in the location and regions with similar climatic information where only temperature data are available. The evaluated existing Hargreaves and Samani and Garcia temperature based models for Jos were compared to those available in literature and was found more suitable for estimating global solar radiation for the location. The comparison between the measured and estimated temperature dependent models depicts slight overestimation and underestimation in some months with good fitting in the studied locations. However, the recommended models give the best fitting.
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Science Publishing Corporation
2019-07-21 14:55:45
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International Journal of Physical Research; Vol. 7 No. 2 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/29775
2019-11-05T03:30:47Z
IJPR:ART
nmb a2200000Iu 4500
"190921 2019 eng "
2307-9010
10.14419/ijpr.v7i2.29775
doi
dc
An approximate solution of the Yang - Mills equation on a spatially flat FRW cosmological background
Shchigolev, Victor
Department of Theoretical Physics, Ulyanovsk State University
In this paper, an approximate solution for the Yang - Mills equation in a spatially flat Friedmann-Robertson-Walker universe is obtained. For this purpose, the well known method of solution of non-linear differential equations is used, viz. the homotopy perturbations method. This method has been developed as effective technique for solving different non-linear problems. Here, this method allowed us to obtain approximate solution for the essentially non-linear equation for the SO3 Yang-Mills fields on the curved space-time background of the spatially flat Friedmann-Robertson-Walker universe.
Science Publishing Corporation
2019-07-21 14:55:45
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International Journal of Physical Research; Vol. 7 No. 2 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/29859
2019-11-05T03:32:10Z
IJPR:ART
nmb a2200000Iu 4500
"191105 2019 eng "
2307-9010
10.14419/ijpr.v7i2.29859
doi
dc
Soliton solutions of coupled higgs field equation via the trial equation method
Subhaschandra Singh, S.
Physics Department, Imphal College, Imphal,Manipur, India.
Since a few recent decades, investigation of nonlinear evolution equations (NLEEs) is becoming an important area of research as they have a variety of applications in various branches of social and scientific disciplines like Ecology, Social Dynamics, Financial Mathematics, Engineering and many branches of Physics such as Biophysics, Chemical Physics, Fibre Optics, Fluid Mechanics, Neuro-physics, Particle Physics, Solid State Physics and many more. Many powerful and efficient methods of finding exact solutions of NLEEs have been proposed so far and the Trial Equation Method [ 1 - 5] is one of them. Many authors have successfully used the method in finding exact solutions of a number of NLEEs. In the present paper, soliton solutions of the Coupled Higgs Field Equation [ 6 - 10 ] are being obtained using the Trial Equation Method.
 The Coupled Higgs Field Equation describes system of conserved scalar nucleons interacting with neutral scalar mesons in particle physics. This coupled equation has applications in the studies of Field Theory and Electromagnetic waves as well. This coupled equation introduces the Higgs field to illustrate the mechanism of generation of mass for Gauge Bosons. The Coupled Higgs Field Equation is generally expressed as the following pair of NLEEs
Â
                                                                                                                                                         (3)
Â
and
Â
                                                                                                                                                                         (2)
Â
Here, x and t are spatial and temporal variables respectively, the function  is a complex scalar nucleon field, the function  is a real scalar meson field,  are arbitrary real constants and the subscripts denote partial differentiations with respect to them.
Using the Trial Equation Method, the above coupled NLEE is to be solved to obtain some soliton solutions.
Science Publishing Corporation
2019-07-21 14:55:45
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International Journal of Physical Research; Vol. 7 No. 2 (2019)
eng
Copyright (c) 2019 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/30475
2020-07-25T22:50:11Z
IJPR:ART
nmb a2200000Iu 4500
"200428 2020 eng "
2307-9010
10.14419/ijpr.v8i1.30475
doi
dc
Rouge wave solutions of a nonlinear pseudo-parabolic physical model through the advance exponential expansion method
Habibul Bashar, Md.
European University of Bangladesh
Mamunur Roshid, Md.
pabna university of science & technology
In this work, we decide the proliferation of nonlinear voyaging wave answers for the dominant nonlinear pseudo-parabolic physical model through the (1+1)-dimensional Oskolkov equation. With the assistance of the advance -expansion strategy compilation of disguise adaptation an innovative version of interacting analytical solutions regarding, hyperbolic and trigonometric function with some refreshing parameters. We analyze the behavior of these solutions of Oskolkov equations for the specific values of the reared parameters such as rouge wave, multi solution, breather wave bell and kink shape etc. The dynamics nonlinear wave solution is examined and demonstrated in 3-D and 2-D plots with specific values of the perplexing parameters are plotted. The advance -expansion method solid treatment for looking through fundamental nonlinear waves that advance assortment of dynamic models emerges in engineering fields.
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Science Publishing Corporation
2020-04-25 19:37:43
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International Journal of Physical Research; Vol. 8 No. 1 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/30689
2020-07-25T22:50:11Z
IJPR:ART
nmb a2200000Iu 4500
"200701 2020 eng "
2307-9010
10.14419/ijpr.v8i1.30689
doi
dc
A study on the correlation potential of compaction characteristics and atterberg limits of selected lateritic soils
Adunoye, G.O
Obafemi Awolowo University
Ojo, A.A
Obafemi Awolowo University
Alasia, A.F
Obafemi Awolowo University
Olarewaju, M.O
Obafemi Awolowo University
The importance of soil compaction for civil engineering construction and application cannot be over-emphasised. To perform soil compaction, numerous number of samples are required, with considerable time and laborious laboratory activities. This has necessitated the need to find models for the prediction of compaction characteristics, using easily determined soil properties. This work therefore undertook a study of the correlation potential of compaction characteristics and Atterberg limits of soils, with a view to modelling compaction characteristics, using Atterberg limits. To achieve this aim, soil samples were obtained from selected locations within Obafemi Awolowo University campus, Ile-Ife, Nigeria. Preliminary, Atterberg limits and compaction tests were conducted on the soil samples, using standard procedure. Using Microsoft Excel and Xuru’s Regression tool, the laboratory test results were used to develop relationships between compaction characteristics (optimum moisture content and maximum dry density) and Atterberg limits (liquid limit and plastic limit). Results showed that the natural moisture content of soil samples ranged between 4.97 % and 19.72 %; liquid limit ranged between 27 % and 68 %; plastic limit ranged between 18.92 % and 63.01 %; and plasticity index ranged between 0.94 % and 14.63 %. The optimum moisture content ranged between 6.7 % and 27 %, while the maximum dry density ranged between 1560 kN/m3 and 2260 kN/m3. The results of regression analysis showed that the combination of liquid limit and plastic limit has a strong correlation with optimum moisture content (R2 = 0.870); while the combination (of liquid limit and plastic limit) showed a weak correlation with maximum dry density (R2 = 0.150). The study concluded that liquid limit and plastic limit could be used to estimate the optimum moisture content of the soils, by applying the developed relationship/equation.
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Science Publishing Corporation
2020-04-25 19:37:43
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International Journal of Physical Research; Vol. 8 No. 1 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/30695
2020-07-25T22:50:11Z
IJPR:ART
nmb a2200000Iu 4500
"200614 2020 eng "
2307-9010
10.14419/ijpr.v8i1.30695
doi
dc
Structural and elastic properties, Vickers hardness and Debye temperature of (B1) BP: DFT study
Daoud, Salah
Mohamed Elbachir El Ibrahimi Bordj Bou Arreridj University, 34000 Bordj Bou Arreridj
A theoretical study of the structural parameters and elastic constants of boron phosphide (BP) compound with cubic rocksalt structure has been carried out using ab-initio density functional theory (DFT) and density functional perturbation theory (DFPT) calculations based on the plane-wave and pseudopotential (PW-PP) approach. Elastic anisotropy factors, Cauchy pressure, inverted Pugh’s ratio, aggregate mechanical moduli (shear modulus, Young's modulus and Poisson's ratio), Vickers hardness HV, elastic wave velocity as well as the Debye temperature θD and the melting point have been also calculated. Our obtained results are in general in good agreement with other data of the literature. The deviation between our obtained value (4.225 Å) of the lattice constant and the theoretical value (4.282 Å) of the literature is around 1.33%, while that between our obtained value (169.7 GPa) of the bulk modulus and the theoretical one (171 GPa) is only around 0.77%. The calculated values of HV and θD were found at around 30.5 GPa and 1254 K (1314.4 K), respectively.
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Science Publishing Corporation
2020-04-25 19:37:43
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International Journal of Physical Research; Vol. 8 No. 1 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/30711
2020-07-25T22:50:11Z
IJPR:ART
nmb a2200000Iu 4500
"200614 2020 eng "
2307-9010
10.14419/ijpr.v8i1.30711
doi
dc
Exploration on traveling wave solutions to the 3rd-order klein–fock-gordon equation (KFGE) in mathematical physics
Hasan Mahmud Shahen, Nur
European University of Bangladesh
., Foyjonnesa
European University of Bangladesh
Habibul Bashar, Md.
European University of Bangladesh
In this paper, the -expansion method has been applied to find the new exact traveling wave solutions of the nonlinear evaluation equations (NLEEs) by utilizing 3rd-order Klein–Gordon Equation (KFGE). With the collaboration of symbolic commercial software maple, the competence of this method for inventing these exact solutions has been more exhibited. As an upshot, some new exact solutions are obtained and signified by hyperbolic function solutions, different combinations of trigonometric function solutions, and exponential function solutions. Moreover, the -expansion method is a more efficient method for exploring essential nonlinear waves that enrich a variety of dynamic models that arises in nonlinear fields. All sketching is given out to show the properties of the innovative explicit analytic solutions. Our proposed method is directed, succinct, and reasonably good for the various nonlinear evaluation equations (NLEEs) related treatment and mathematical physics also.
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Science Publishing Corporation
2020-04-25 19:37:43
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International Journal of Physical Research; Vol. 8 No. 1 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/30769
2020-12-18T13:07:57Z
IJPR:ART
nmb a2200000Iu 4500
"200824 2020 eng "
2307-9010
10.14419/ijpr.v8i2.30769
doi
dc
Geotechnical investigation of road pavement failure along arigidi / oke - agbe akoko, southwestern, Nigeria
Henry Tolulope Ogunribido, Thompson
Adekunle Ajasin University
Ezekiel Fadairo, Tunde
Adekunle Ajasin University
Twenty soil samples collected from the failed portions in the study area were air dried for two weeks before analyses. Each soil samples were subjected to eight engineering tests which include: natural moisture content, atterberg limit, specific gravity, compaction, unconfined compressive strength, California bearing ratio, grain size and hydrometer analysis. Results showed that the natural moisture content ranged from 17.7% to 37.8%, liquid limit from 48.5% to 62.4%, plastic limit from 18.3% to 26.8%, plasticity index from 25.7% to 37.7%, shrinkage limit from 5.8%-12.5%, optimum moisture content from 14.2% to 32.4%, maximum dry density from 1301 Kg/rn3 to 2002 Kg/rn3. Soaked California bearing ratio ranged from 5% to 17%, unsoaked from 15% to 38%, specific gravity from 2.5 to 2.68, unconfined compressive strength r from 112.8 Kpa to 259.7 Kpa, shear strength from 56.4 Kpa to 129.9 Kpa and hydrometer analysis from 48.5% to 72.1%. Based on the Federal Government specifications for pavement construction, for the soil to be suitable, stabilization with bitumen, Portland cement, lime, coal fly ash, and saw dust should be done. Road pavement failure along Arigidi – Oke Agbe road was due to poor engineering geological condition of the sub-grade soils and poor drainage systems.
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Science Publishing Corporation
2020-08-23 08:44:29
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International Journal of Physical Research; Vol. 8 No. 2 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/30803
2020-07-25T22:54:09Z
IJPR:ART
nmb a2200000Iu 4500
"200725 2020 eng "
2307-9010
10.14419/ijpr.v8i1.30803
doi
dc
Gamma activity in Tigris river water and Rustumai wastewater treatment plant
R. Al-Ani, Rana
University of Technology
A. Amin, Sahar
University of Technology
The activity level of 226Ra, 232Th and 40K radionuclides at selected locations of Tigris River and Rustumai water treatment plant (before and after treatment) has been determined by using NaI(Tl) gamma spectrometry. The results show that the total average activity values were 44.3Bq kg−1 and 789.6Bq kg−1 for 226Raand 40K, respectively. These values are higher than the world recommended values given by UNSCEAR, while the total activity concentration of 232Th was within the world recommended value of 30 Bq.kg-1. Radiological hazard indices such as: radium equivalent activity in Bq.kg−1, annual equivalent dose in Sv.y−1, external and internal hazard indexes, representative gamma index, dose rate in nGy.h−1 and annual effective dose equivalent (outdoor and indoor) in mSv.y−1 were calculated. The calculated indices were below the world recommended values, hence they have no serious effects on people health and environmental species and the Tigris River water can be considered un-harmful for the environment and humans as they are within the world median limits. In the case of Rustumai wastewater treatment plant samples for untreated and treated samples, the average activity concentrations of the three radionuclides were higher than the world recommended values.
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Science Publishing Corporation
2020-04-25 19:37:43
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International Journal of Physical Research; Vol. 8 No. 1 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/30990
2020-12-18T13:07:57Z
IJPR:ART
nmb a2200000Iu 4500
"200902 2020 eng "
2307-9010
10.14419/ijpr.v8i2.30990
doi
dc
Dark soliton solutions to (2 + 1)-dimensional Kundu-Mukherjee-Naskar equation via the first integral method
Subhaschandra Singh, Salam
Physics Department, Imphal College, Imphal,Manipur, India.
 In the present work, the First Integral Method is being applied in finding a non-soliton as well as a soliton solution of the ( 2 + 1 ) dimensional Kundu-Mukherjee-Naskar (KMN) equation which is a variant of the well-known Nonlinear Schrodinger ( NLS ) equation. Using the method, a dark optical soliton solution and a periodic trigonometric solution to the KMN equation have been suggested and the relevant conditions which guarantee the existence of such solutions are also indicated therein.
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Science Publishing Corporation
2020-08-23 08:44:29
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International Journal of Physical Research; Vol. 8 No. 2 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31001
2020-12-18T13:07:57Z
IJPR:ART
nmb a2200000Iu 4500
"200902 2020 eng "
2307-9010
10.14419/ijpr.v8i2.31001
doi
dc
Elastic constants and optical phonon frequencies of BX (X= P, As, and Sb) semiconductors: Semi-empirical prediction
Daoud, Salah
Laboratory of Materials and Electronic Systems (LMSE), Faculty of Sciences and Technology, Mohamed Elbachir El Ibrahimi, Bordj Bou Arreridj University, 34000 Bordj Bou Arreridj, Algeria
Kumar Saini, Pawan
Department of Physics, Government College, Hansi, Haryana,125033, India
Rekab-Djabri, Hamza
Department of Physics, Government College, Hansi, Haryana,125033, India
Based on some simple empirical formulas established by Adachi in, Properties of group-IV, III-V and II-VI semiconductors, John Wiley & Sons, Chichester (2005), and the experimental lattice constants reported in the literature; the present work aims to predict the elastic constants and some other significant properties of cubic zinc-blende boron compounds (BP, BAs and BSb). The obtained values of C12and C44 are in general good agreement with other data of the literature, while C11 and B are slightly lower. The zone-center longitudinal optical (LO) and transverse optical (TO) phonon frequencies are also obtained. The LO and TO phonon frequencies of BP compound were found at 866.6and 834.5 cm–1, respectively; these of BAs were found at 731.3 and 727.1 cm–1, respectively; while for the BSb narrow-gap semiconducting compound were found at around 598.3and 586.2 cm–1, respectively. These two later values are in general slightly lower than the calculated values, and the observed Raman spectroscopy values reported in the literature.
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Science Publishing Corporation
2020-08-23 08:44:29
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International Journal of Physical Research; Vol. 8 No. 2 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31029
2020-12-18T13:07:57Z
IJPR:ART
nmb a2200000Iu 4500
"200902 2020 eng "
2307-9010
10.14419/ijpr.v8i2.31029
doi
dc
Alpha activity emitted from leaves and roots of beetroot plant planted in enhanced soil with fertilizers
Ahmed Amin, Sahar
University of Technology
This study is to assesses radioactive materials transported to the beetroot plants grow in different fertilized soil. Equivalent weights of fertilizers were added to the soil prior the plantation. The alpha track densities were estimated utilizing solid state nuclear track detector (SSNTDs), CR-39. The obtained results show that alpha track densities in Beetroot plants in the lower and upper sides of plant leaves were varied from 67.62 Tr.cm−2 to 101.83 Tr.cm−2 and from 45.35 Tr.cm−2 to 94.67 Tr.cm−2 with mean values of 89.96 Tr.cm−2 and 68.48 Tr.cm−2, respectively. Alpha track densities were also measured in the samples of the enhanced plantation soil with fertilizers and in the whole parts of the Beetroot plant which were planted in these soils. These values were compared with alpha track densities obtained from fertilizer samples in the previous studies. The lower face of leaves gives higher α-particles activity than that obtained from the upper face. As well as, the alpha activity from the plants planted in soils enhanced with phosphate compost was found greater as contrast with that planted in a soil enhanced with organic fertilizer. The utilization of organic fertilizer don't cause much risks like contrasted with phosphate fertilizers. Therefore, the alpha activity depends on the nature of fertilizers added to the soil.
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Science Publishing Corporation
2020-08-23 08:44:29
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International Journal of Physical Research; Vol. 8 No. 2 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31200
2020-12-18T13:07:57Z
IJPR:ART
nmb a2200000Iu 4500
"201110 2020 eng "
2307-9010
10.14419/ijpr.v8i2.31200
doi
dc
Assessment of heavy metals and radioactivity concentrations in Iraqi truffles
A. Amin, Sahar
University of Technology
A. Alsabagh, Afaf
University of Technology
A. Abdul Majeed, Athmar
University of Technology
N. Ali, Ali
University of Technology
M. Abdul Hadi, Ehab
University of Technology
Concentrations of heavy metals in several species of desert truffles, collected from different Iraqi provinces, were determined. Samples were collected from Al-Anbar Salah ad-Den and AlMuthana provinces. The levels of Cd, Cr, Pb, Mn, Ni, and Zn were analyzed. As well as the level of radon in the truffle samples were also measured using the solid-state nuclear track detector (CR-39). The results reveal that the concentrations of the investigated elements in the Iraqi truffles were below the recommended levels and the ascending order of the measured toxic elements was Ni˂Mn˂Zn. The concentrations of the other elements (Cd, Cr and Pb) were below the detection limit of the measuring method. Radon activity levels in the study truffle samples were between (156.23 to 513.83) Bq.m-3 with mean value of (323.23) Bq.m-3. the results reveal that most measured radon activity were below the world recommended value given by ICRP except Ramadi sample. All the computed values of health risk index (HR) of all elements were within safe limits (HR<1), therefore, the consumption of the investigated truffles does not pose any health risks from the investigated heavy elements and from radiological point of view.
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Science Publishing Corporation
2020-08-23 08:44:29
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International Journal of Physical Research; Vol. 8 No. 2 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31209
2020-12-18T13:07:57Z
IJPR:ART
nmb a2200000Iu 4500
"201218 2020 eng "
2307-9010
10.14419/ijpr.v8i2.31209
doi
dc
Radiological risk assessment of some consumed cigarettes and hookah in Iraq
Amin, Sahar
University of Technology
Haleem, Azhar
University of Technology
Mahmood, Ola
University of Technology
The main purposes of the research are to assess the radiological risk due to smoking cigarettes and hookah and their impacts on the people health. Radon levels were measured in 28 consumed brands of cigarettes and 10 brands of hookah consumed Iraq using CR-39 solid state nuclear track detectors (SSNTDs). The results showed that the 222Rn concentration in cigarette tobacco samples ranged from 138.9 to 781.2 Bqm-3 with average value of 318.0 Bqm-3. The radon concentrations emerged from 11brands of the investigated samples was significantly higher than the recommended value. While, its concentration in hookah ranged from 633.6 Bqm-3 to 416.6 Bqm-3 with average value of 509.5 Bqm-3. The Potential Alpha Energy Concentration (PAEC) in terms of (WL) units, Exposure to radon progeny (EP), and the annual effective dose (AED) in terms of (mSv/y) units were also obtained. Lung cancer cases per year per million people (CPPP) are also evaluated with an average value of 144.4 per million people. The result indicates that the average values of PAEC, EP and AED were within the recommended range values given by UNSCEAR, NCRP and ICRP respectively. The radioactive impact of smoking is considered as a risk factor for lung cancer.
Science Publishing Corporation
2020-08-23 08:44:29
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International Journal of Physical Research; Vol. 8 No. 2 (2020)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31243
2021-07-24T14:14:08Z
IJPR:ART
nmb a2200000Iu 4500
"201227 2020 eng "
2307-9010
10.14419/ijpr.v9i1.31243
doi
dc
Quantum non-demolition measurement in the interferometer
Khokhlov, Dmitri
Sumy State University
The schemes of the arrangements based on the Mach-Zehnder interferometer and the interferometer with two polarizing beam splitters are considered. The interferometers in both the schemes are equipped with some devices, creating a Kerr medium, to perform the quantum non-demolition measurement of a single photon. Such a device gives which way information of the photon while preserving the work of the interferometer.
Science Publishing Corporation
2020-12-24 17:03:32
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International Journal of Physical Research; Vol. 9 No. 1 (2021)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31247
2021-07-24T14:14:08Z
IJPR:ART
nmb a2200000Iu 4500
"201225 2020 eng "
2307-9010
10.14419/ijpr.v9i1.31247
doi
dc
The thermodynamic principles as the theoretical basis of fair remuneration
Dobija, Mieczysław
Cracow University of Economics
Renkas, Jurij
Cracow University of Economics
Thermodynamics is the key to solving many economic problems. Since the human body is driven by heat engines, there is a loss of energy source. Measuring this loss means it is possible to indicate the size of a fair wage. Another version of the second principle justifies the amount of depreciation of real assets, such as machinery and equipment. A significant purpose of the article is to indicate that the category of capital cannot be understood without knowing the first and second principle of thermodynamics. The main aim is to present the theory of equitable remuneration developed using the second principle of thermodynamics and the discovered economic constant. Theoretical research leads to the creation of a model of capital and a model of fair pay with the understanding of the existence of an economic constant quantifying the action of natural forces on capital growth. Empirical research estimates the size of the constant and verifies the fairness of remuneration. The research reveals the existence of an economic constant necessary in capital theory, especially in the field of remuneration for work. Models for measuring human capital of employees and formulas enabling calculation of fair remuneration and its updating are presented. Additionally, using the entropic version of the second principle, the depreciation amounts of fixed assets are determined. The main conclusion of the presented research and the formulated theory is that thermodynamics is essential for the correct understanding of the category of capital defining as the abstract ability to perform work.
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Science Publishing Corporation
2020-12-24 17:03:32
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International Journal of Physical Research; Vol. 9 No. 1 (2021)
eng
Copyright (c) 2020 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31271
2021-07-24T14:14:08Z
IJPR:ART
nmb a2200000Iu 4500
"210113 2021 eng "
2307-9010
10.14419/ijpr.v9i1.31271
doi
dc
New closed-form soliton solutions for the tzitzeica dodd bullough equation arising nonlinear optics via three distinct re-liable approaches
Hawlader, Faisal
Bangabandhu Sheikh Mujibur Rahman Science and Technology University
Akter, Nahida
Bangabandhu Sheikh Mujibur Rahman Science and Technology University
Tzitzeica Dodd Bullough (TDB) equation appears in the field of quantum field theory and nonlinear optics. In this article, we extracted abundant new soliton solutions with free choice of arbitrary parameters to the Tzitzeica-Dodd-Bullough (TDB) equation through the three separate methods such as the enhanced -expansion method, the improved -expansion method and the -expansion method by means of the wave transformation and the Painleve property. In these schemes, we formally derived some new closed form soliton solutions of the TDB equation through with symbolic computation package Maple. Soliton solutions are expressed by hyperbolic function, trigonometric function and rational function. The attained solutions are verified by symbolic computation software Maple 17. The attained solutions can be demonstrated by two-dimensional (2D) and three-dimensional (3D) graphs. Finally, it can be concluded that the adopted methods are very effective and well-suited to find new closed-form soliton solutions to the other nonlinear evaluation equations (NLEEs) with integer or fractional order.
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Science Publishing Corporation
2020-12-24 17:03:32
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http://www.sciencepubco.com/index.php/IJPR/article/view/31271
International Journal of Physical Research; Vol. 9 No. 1 (2021)
eng
Copyright (c) 2021 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31337
2021-07-24T14:14:08Z
IJPR:ART
nmb a2200000Iu 4500
"210202 2021 eng "
2307-9010
10.14419/ijpr.v9i1.31337
doi
dc
Construction of steel shed: a case study of automobile service center, bells university of technology, Sango-Ota, Ogun state, Nigeria
O. Ajala, M.
College of Technology, University of Ibadan. Ibadan. Nigeria
The construction of steel shed for Automobile Service Centre at the Bells University, Sango-Ota, Ogun State, Southwestern Nigeria was deemed necessary in order to expand the existing structure, ensure safety and bring economic gains to the Institution. This paper therefore presents a report of the construction of steel shed at the Automobile Service Centre where activities such as automobile checks, repairs and so on are been carried out. In carrying out the project, the following methods were adopted: evaluation of design/working drawings, selection and fabrication of structural members, construction work and finishing. All methods follow standard procedures as specified in relevant British standards. The assemblage and completed work were the results of the methods mentioned above and it was confirmed that the members were adequate to carry the live and dead loads that they may be subjected to. The aim of the project was achieved.
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Science Publishing Corporation
2020-12-24 17:03:32
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/31337
International Journal of Physical Research; Vol. 9 No. 1 (2021)
eng
Copyright (c) 2021 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31392
2021-07-24T14:14:08Z
IJPR:ART
nmb a2200000Iu 4500
"210219 2021 eng "
2307-9010
10.14419/ijpr.v9i1.31392
doi
dc
Electromagnetic field in a rectangular cavity: an example of second quantization
Otieno Ndinya, Boniface
Masinde Muliro University of Sciece and technologyDepartment of PhysicsP.O.Box190-50100Kakamega
We consider the case of electromagnetic field inside a rectangular cavity with conducting walls as a form of a system described by classical mechanics equations. We pass these equations through the Lagrangian formalism to obtain the Hamiltonian formulation. Finally we apply canonical quantization to end up with a quantum theory of the electromagnetic field. Since classical electrodynamics can be interpreted as the quantum theory of a one photon system, then the above quantization is taken as the “quantization of the quantum theory of the electromagnetic field†or simply second quantization.
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Science Publishing Corporation
2020-12-24 17:03:32
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/31392
International Journal of Physical Research; Vol. 9 No. 1 (2021)
eng
Copyright (c) 2021 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31415
2021-07-24T14:14:08Z
IJPR:ART
nmb a2200000Iu 4500
"210227 2021 eng "
2307-9010
10.14419/ijpr.v9i1.31415
doi
dc
Mathematical computation of water quality index to determine surface water quality of manyad storage tank, Aurangabad district, Maharashtra, India
L. Dhumal, M.
Department of Mathematics, Deogiri College, Aurangabad, India-431005
The present work aims to assess the water quality index (WQI) of Manyad Storage tank, of Aurangabad district, Maharashtra, India. The surface water sample were assessed for physico-chemical parameters namely pH, Electrical Conductivity, Total Dissolved Solid, Total Hardness, Bicarbonate, Chlorides, Sulphates, Nitrates, Calcium, Magnesium, Sodium, Potassium and Fluoride in post-monsoon season of 2020. For calculating the water quality index (WQI), thirteen parameters namely, pH, electrical conductivity, total dissolved solids, total hardness, bicarbonate, calcium, magnesium, sodium, potassium, chloride, sulphate, nitrate and fluorides were considered. Weighted arithmetic water quality index method was used to find surface water quality index (WQI). The water quality index of surface water found to be 96.24 indicating poor water category, which shows that whole water from the Manyad Storage tank is of very poor quality and treatment must be given before use for drinking purpose.
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Science Publishing Corporation
2020-12-24 17:03:32
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/31415
International Journal of Physical Research; Vol. 9 No. 1 (2021)
eng
Copyright (c) 2021 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31432
2021-07-24T14:14:08Z
IJPR:ART
nmb a2200000Iu 4500
"210319 2021 eng "
2307-9010
10.14419/ijpr.v9i1.31432
doi
dc
On the compactification and reformation of string theory with three large atomic gravitational constants
V.S. Seshavatharam, U.
I-SERVE, Hyderabad, AP, India.Sr. Engineer, QA-DIP, Lanco Industries Ltd, Tirupati, AP, India.
Lakshminarayana, S.
Andhra University, Visakhapatnam-03,AP
Array
Scientists strongly believe that, String theory is empowered with good mathematics and smartly fits gravity in unification program. Point to be noted is that, by considering the Planck length as characteristic amplitude associated with strings, String theory advances its ideological representation. Very unfortunate thing is that, even though, originally, String theory was proposed for understanding ‘strong interaction’, as Planck length is 20 orders of magnitude less than the nuclear size, it is badly failing in explaining and predicting nuclear scale physical phenomena. Here, we would like to stress the point that, within the scope of observed materialistic physical systems, without addressing the roots of H-Bar and big G, it is impossible to construct a workable model of final unification. In this context, in our earlier publications, we proposed the existence of three large gravitational constants for the three atomic interactions. Based on the three large atomic gravitational constants, it is possible to have three different workable atomic Planck amplitudes and thus there is a possibility for reforming and compactifying the 10 dimensional String theory to 3+1 dimensions. Proceeding further, H-bar can be shown to be a characteristic outcome of the electroweak interaction and big G can be shown to be a characteristic outcome of the three atomic gravitational constants.
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Science Publishing Corporation
2020-12-24 17:03:32
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/31432
International Journal of Physical Research; Vol. 9 No. 1 (2021)
eng
Copyright (c) 2021 International Journal of Physical Research
oai:ojs.pkp.sfu.ca:article/31470
2021-07-24T14:14:08Z
IJPR:ART
nmb a2200000Iu 4500
"210421 2021 eng "
2307-9010
10.14419/ijpr.v9i1.31470
doi
dc
Concentrations and health risks assessment of heavy metals in cigarettes within Baghdad city
M. Haleem, Azhar
University of technology
A. Amin, Sahar
University of Technology
The risks associated with smoking can be due to the inhalation of toxic substances like heavy metals and polycyclic aromatic hydrocarbons (PAHs) that can be released during tobacco burns. In the present study we measured lead Pb and three other metals (cadmium Cd; Chrome Cr; and Zinc Zn) by flame atomic absorption spectroscopy (FAAS). In a twenty-five brands of cigarettes, assessing potential related health risks estimated intakes of these metals. The Related Cancer Risk (RCR) and Average Daily Intake (ADI) were calculated. The results revealed that the average values of Pb, Cd, Cr and Zn concentrations were (4.56, 0.39, 3.31 and 1.36) μg/g respectively. The total value of these four metals is greater than the range of cancer risk specified by USEPA.
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Science Publishing Corporation
2020-12-24 17:03:32
application/pdf
http://www.sciencepubco.com/index.php/IJPR/article/view/31470
International Journal of Physical Research; Vol. 9 No. 1 (2021)
eng
Copyright (c) 2021 International Journal of Physical Research
0037e4a3fa928807d08e678ff2ea2489