2024-03-29T14:24:18Z
http://www.sciencepubco.com/index.php/ijet/oai
oai:ojs.pkp.sfu.ca:article/5
2014-11-13T03:09:40Z
ijet:ART
Creeping flow of Micropolar fluid past a fluid sphere with non-zero spin boundary condition
Deo, Satya
Shukla, Pankaj
Abstract: This paper concerns the problem of creeping flow of an incompressible micropolar fluid past a fluid sphere with non-homogeneous boundary condition for micro rotation vector i.e. the micro rotation on the boundary of the fluid sphere is assumed to be proportional to the rotation rate of the velocity field on the boundary. The stream functions are determined by matching the solution of micropolar field equation for flow outside the fluid sphere with that of the Stokes equation for the flow inside the fluid sphere. The drag force experienced by a fluid sphere is evaluated and its variation is studied with respect to the material parameters. Some well-known results are then deduced.
Science Publishing Corporation
2012-05-10
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/5
10.14419/ijet.v1i2.5
International Journal of Engineering & Technology; Vol. 1 No. 2 (2012); 67-76
2227-524X
10.14419/ijet.v1i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/5/49
oai:ojs.pkp.sfu.ca:article/14
2016-01-23T13:18:25Z
ijet:ART
Solutions of Fractional Zakharov-Kuznetsov Equations By FCT method; This paper has been withdrawn
Molliq, R. Yulita
This paper has been withdrawn
Science Publishing Corporation
2012-03-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/14
10.14419/ijet.v1i1.14
International Journal of Engineering & Technology; Vol. 1 No. 1 (2012); 1-13
2227-524X
10.14419/ijet.v1i1
oai:ojs.pkp.sfu.ca:article/18
2014-11-13T03:09:37Z
ijet:ART
Design of Dual Band Patch Antennas for Cellular Communications by Genetic Algorithm Optimization
Jayasinghe, Jeevani
Uduwawala, Disala
Anguera, Jaume
Designing multiband antennas with low volume becomes of practical interest for mobile telecommunications. This paper presents the designs of five small dual band patch antennas for GSM 1800 (1710-1880MHz) and Bluetooth (2400-2483.5MHz) applications using a genetic algorithm combined with MoM (Method of Moments). A substrate with dielectric constant 3.2 and height 8mm is used for the first two dual band designs. The height is reduced thanks to the optimization process to 6mm in the third design by inserting a shorting pin to the fragmented patch antenna. Further the height is reduced to 4mm in the by inserting two shorting pins. In the final design with three shorting pins, the height is only 3mm. The patch dimensions are similar to that of the conventional rectangular patch for the center frequency of the lowest frequency band but with the advantage of having dual-band operation at the desired bands. Genetic algorithm optimization is used to optimize the patch geometry, feed position and shorting positions. HFSS is used to carry out simulations. The antenna thickness is reduced from 8mm to 3mm by incorporating shorting pins which position is optimized by the genetic algorithm.
Science Publishing Corporation
2012-04-17
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/18
10.14419/ijet.v1i1.18
International Journal of Engineering & Technology; Vol. 1 No. 1 (2012); 26-43
2227-524X
10.14419/ijet.v1i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/18/436
oai:ojs.pkp.sfu.ca:article/23
2014-11-13T03:09:42Z
ijet:ART
An ant colony system for solving fuzzy flow shop scheduling problem
Pour, Nasser Shahsavari
Ashkezari, Mohammad hossein Abolhasani
Andargoli, Hamed Mohammadi
During the past years, the flow shop has been regarded by many researchers and some extensive investigations have been done on this respect. Flow Shop includes n works performed on m machines in a same sequence. It is very difficult in the real world to determine the exact process time of an operation on a machine. Therefore, we consider in this article the process time as trapezoidal fuzzy numbers. Our purpose is that we obtain a sequence of works using such fuzzy numbers in order to minimize maximum fuzzy time of completion entire jobs or fuzzy makespan. We offered an optimization algorithm of Ant Colony System (ACS) to solve this problem. Finally, we present computational results for explanation and comparison with other articles in future.
Science Publishing Corporation
2012-04-28
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/23
10.14419/ijet.v1i2.23
International Journal of Engineering & Technology; Vol. 1 No. 2 (2012); 44-57
2227-524X
10.14419/ijet.v1i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/23/40
oai:ojs.pkp.sfu.ca:article/24
2014-11-13T03:09:39Z
ijet:ART
Common Fixed Points of Weakly Compatible Mappings in ~-Chainable Intuitionistic Fuzzy Metric Spaces
Mehra, Seema
The aim of this paper is to introduce the notion of ~-chainable intuitionistic fuzzy metric spaces and prove a common fixed point theorem for four weakly compatible mappings in this newly defined space. Our result is intuitionistic fuzzy version of Cho and Jung's [1] and Mukherjee's [9] results in ~-chainable fuzzy metric space.
Science Publishing Corporation
2012-04-13
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/24
10.14419/ijet.v1i1.24
International Journal of Engineering & Technology; Vol. 1 No. 1 (2012); 14-25
2227-524X
10.14419/ijet.v1i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/24/435
oai:ojs.pkp.sfu.ca:article/43
2014-11-13T03:09:44Z
ijet:ART
Calculating the Fuzzy Project Network Critical Path
Pour, Nasser Shahsavari
Zeynali, Samira
Kheradmand, Mansoor
A project network consists of various activities. To determine the length of project time and the amount of the needed sources, the time of project completion must correctly and exactly be calculated, so the critical path is calculated. The activities on this path have no floating. It means that there is no delay on these activities. As a result the calculation of the critical path in a project network has a special importance. In this paper a simple method for calculation the critical path is proposed. Assignment an exact time on any activity in real world is not correct; So the fuzzy and uncertainty theories are used to assigned a length of time on any activities. In the present study the trapezoidal fuzzy numbers are assigned to the length of activity time, and the total time of the project is also a fuzzy number. In addition, to compare the fuzzy numbers, ranking of fuzzy numbers are used. Finally a practical example will show the efficiency of the method.
Science Publishing Corporation
2012-05-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/43
10.14419/ijet.v1i2.43
International Journal of Engineering & Technology; Vol. 1 No. 2 (2012); 58-66
2227-524X
10.14419/ijet.v1i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/43/46
oai:ojs.pkp.sfu.ca:article/52
2014-11-13T03:09:51Z
ijet:ART
Finite element solution of thermal radiation effect on unsteady MHD flow past a vertical porous plate with variable suction, “This paper has been withdrawn”
Gundagani, Murali
Reddy, MCK
Babu, NVN
Sivaiah, S.
This paper has been withdrawn.
Science Publishing Corporation
2012-06-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/52
10.14419/ijet.v1i3.52
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 124-140
2227-524X
10.14419/ijet.v1i3
oai:ojs.pkp.sfu.ca:article/70
2014-11-13T03:09:45Z
ijet:ART
Host-Parasitoid Model With Intraspecific Competitions
Sahoo, Banshidhar
Poria, Swarup
In this paper a discrete-time host-parasitoid model with intraspecific competitions is proposed. Phase portraits are drawn for different types of intraspecific competitions to notice the effects of intraspecific competitions for biologically reasonable range of parameter values. Bifurcation analysis is done with respect to instantaneous search rate as well as handling time for different types of intraspecific competitions. Many forms of complex dynamics such as chaos, periodic windows etc. are observed. The stable coexistence as well as oscillatory coexistence of host and parasitoid are shown under different types of intraspecific competitions. The Hopf point and attractor crises exist for different intraspecific competitions.
Science Publishing Corporation
2012-06-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/70
10.14419/ijet.v1i2.70
International Journal of Engineering & Technology; Vol. 1 No. 2 (2012); 105-114
2227-524X
10.14419/ijet.v1i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/70/76
oai:ojs.pkp.sfu.ca:article/76
2014-11-13T03:09:47Z
ijet:ART
Socio Technical Impact of Broadband Services in Baluchistan
Ahthasham, Saira
Shaikh, Aftab Ahmed
Iqbal, Muhammad
Sajid, Ahtsham
Shahzad, Amir
Broadband infrastructure is a key component of knowledge economy. Broadband service both on fixed and mobile networks are becoming an indicator of the knowledge economy. Globally it is viewed that countries with developed broadband infrastructures are working more efficiently and effectively towards social and economic growth. To achieve worldwide broadband connectivity level Government of Pakistan and industry must play a combine role for the betterment and improvement of the said industry. Government and market players must come up with innovative broadband packages that can capture the customer demand. This paper analysis market trends, customer expectation and socio-technical impact of broadband service in Baluchistan.
Science Publishing Corporation
2012-05-21
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/76
10.14419/ijet.v1i2.76
International Journal of Engineering & Technology; Vol. 1 No. 2 (2012); 77-93
2227-524X
10.14419/ijet.v1i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/76/56
oai:ojs.pkp.sfu.ca:article/77
2014-11-13T03:09:48Z
ijet:ART
Improvement of BGP Session Maintenance
Amin, Sadia
Ahthasham, Saira
Shaikh, Aftab Ahmed
Sajid, Ahthasham
Mehmood, Mirza Aamir
In the early days, the Internet used static routes, but very quickly network administrators couldn’t keep manually updating their routing tables. Later, Internet network administrator used a protocol called EGP but EGP was not scalable so BGP was introduced to solve all problems and more. BGP stands for Border Gateway Protocol and the most current version is BGP4. BGP is a routing protocol that runs on routers. BGP allows fully decentralized management of the Internet. That means, if BGP router is on the Internet, it can tell all other routers that what networks are available to everyone in the world. BGP calls each routing domain an autonomous system (AS). It selects the best path, through the Internet, by choosing the route that has to traverse the fewest autonomous systems. As BGP provides information for controlling the flow of packets between ASes, the protocol plays a critical role in Internet efficiency, reliability, and security. However, slow convergence and abnormal termination of session are major vulnerability of BGP. Simplifying BGP design complexity helps in research, for the root cause analysis of BGP. Deriving technique to prevent the loss of data, reduce the convergence time and maintaining the sessions of BGP by instantly diverting the traffic from teardown / flapped link to the backup link considering as active link. It will be a great success to achieve the goal to maintain the sessions and reduce the BGP convergence time.
Science Publishing Corporation
2012-05-24
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/77
10.14419/ijet.v1i2.77
International Journal of Engineering & Technology; Vol. 1 No. 2 (2012); 94-104
2227-524X
10.14419/ijet.v1i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/77/57
oai:ojs.pkp.sfu.ca:article/78
2014-11-13T03:09:50Z
ijet:ART
Performance of the Salt Bridge Based Microbial Fuel Cell
Khan, Maksudur R.
Bhattacharjee, Ripon
Amin, M. S. A.
Electricity generation from readily biodegradable organic substrates accompanied by decolorization of azo dye was investigated using a Microbial fuel cell (MFC). Biodegradation was the dominant mechanism of the dye removal, and glucose was the optimal substrate for Red Cibacron-2G (RC) decolorization. Batch experiments were conducted to evaluate the performance of the MFC. As compared to traditional anaerobic technology higher decolorization efficiency was achieved by MFC. Effect of initial dye concentration and external resistance on power generation were studied. Polarization experiments were also directed to find the maximum power density. Maximum Power density of 100mW/m2 (1.04A/m2) was recorded at optimum operating conditions.
Science Publishing Corporation
2012-06-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/78
10.14419/ijet.v1i2.78
International Journal of Engineering & Technology; Vol. 1 No. 2 (2012); 115-123
2227-524X
10.14419/ijet.v1i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/78/77
oai:ojs.pkp.sfu.ca:article/81
2014-11-13T03:09:53Z
ijet:ART
Two-Phase Pressure Drop Calculations in Small Diameter Inclined Tubes
Autee, Arun
Rao, S.Srinivasa
Puli, Ravikumar
Shrivastava, Ramakant
Effect of inclination on two-phase frictional pressure drop was investigated in small diameter circular tubes with inner diameters of 4.0, 6.0, 8.0 and 10.0 mm using air and water. Pressure drop was measured and compared with various existing models commonly used for macro and micro channels such as homogeneous, Lockhart-Martinelli, Chisholm, Friedel, Mishma Hibiki, and Zang Mishma. It was found that existing correlations are inadequate in predicting pressure drop for small diameter inclined tubes. The void fraction is calculated using a general void fraction correlation in two-phase flow for various pipe orientations. Based on analysis of present experimental frictional pressure drop data, a correlation is proposed for predicting Chisholm parameter “C” in small diameter inclined tubes. There was a significant ordering of pressure drop data with respect to Reynolds number, Webber number and Bond number for each diameter.
Science Publishing Corporation
2012-06-21
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/81
10.14419/ijet.v1i3.81
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 168-181
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/81/103
oai:ojs.pkp.sfu.ca:article/86
2014-11-13T03:09:54Z
ijet:ART
Impact of Web Readability on Cultural Usability
Hussain, Walayat
Junaid, Muhammad
Muneer, Siraj
Khan, Muhammad Qasim
Web is considered one of the greatest developments of twentieth century. It provides a diverse range of applications and therefore needs different usability designs. Web usability has become a vital aspect for the success of web applications. Web usability is about fulfilling the goals and expectations of users and making their stay on the website pleasant. Web usability design includes three aspects: User Research, Web Design and Web Evaluation [1]. Today, the web design is moving from technology to users i.e. it is more user-centered than ever before. “Web design must directly face users with the specific needs, and must ensure that users are pleasant to successfully complete tasks with it.” [1]. In this study, we have studied the factors which affect the web readability in this part of the world. We conducted the survey in order to check how different factors play their part for the people who speak languages which are written right to left
Science Publishing Corporation
2012-06-12
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/86
10.14419/ijet.v1i3.86
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 141-157
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/86/88
oai:ojs.pkp.sfu.ca:article/89
2014-11-13T03:09:55Z
ijet:ART
Slotted Circular Microstrip Patch Antenna Designs for multiband Application in Wireless Communication
Gupta, Hemant Kumar
Singhal, P.K.
Sharma, Pavan Kumar
Jadon, Veerendra Singh
The paper present the Circular Microstrip Patch Antenna designs with slit-slot for multiband purpose in wireless communication. We have designed a circular microstrip patch antenna (CMPA) for 1.3GHz used in wireless communication. We have designed CMPA with 2slit slot, 3slit-slot, and 6slit-slot and observed results for different designs, and finally it is shown that as slit-slot increases to six slit-slot Return-loss and Bandwidth of CMPA are reduced.The multiband antenna use for wireless communication in different applications. Bandwidth improvement is about 63.3%, 72.10% and 37.5% respectively in two, three and six slit-slotted patch when compared to their basic design bandwidth band. Antenna is changed to multiband by slit-slot Circular Microstrip Patch Antenna (CMPA).
Science Publishing Corporation
2012-06-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/89
10.14419/ijet.v1i3.89
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 158-167
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/89/92
oai:ojs.pkp.sfu.ca:article/102
2014-11-13T03:10:15Z
ijet:ART
Analyzing the Role of Semantic Web in Social Networking Sites “This paper has been withdrawn”
Sharma, Ravi
This paper has been withdrawn.
Science Publishing Corporation
2012-10-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/102
10.14419/ijet.v1i4.102
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 505-517
2227-524X
10.14419/ijet.v1i4
oai:ojs.pkp.sfu.ca:article/117
2014-11-13T03:09:57Z
ijet:ART
Reduced Size & Wide Band Rectangular Microstrip Patch Antenna loaded with “STRR” at 1.52GHz, “This paper has been withdrawn”
Garg, Bimal
Sharma, Vijay
Agrawal, Nitin
Dubey, Prashant
“This paper has been withdrawn”
Science Publishing Corporation
2012-07-02
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/117
10.14419/ijet.v1i3.117
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 182-191
2227-524X
10.14419/ijet.v1i3
en
oai:ojs.pkp.sfu.ca:article/124
2014-11-13T03:09:58Z
ijet:ART
Design of Rectangular Microstrip Patch Antenna Incorporated with Innovative Metamaterial Structure for Dual band operation and Amelioration in Patch Antenna Parameters with Negative µ and ?
Garg, Bimal
Verma, Rahul Dev
Samadhiya, Ankit
In this work a dual band rectangular microstrip patch antenna along with the innovative metamaterial structure is proposed at a height of 3.2mm from the ground plane, which consists of a rectangular geometry incorporated with c shaped structure. This work is mainly focused on increasing the potential parameters of microstrip patch antennas and analyzing the dual band operation of proposed antenna. The proposed antenna is designed to resonate at 2.478GHz and 2.919GHz frequency. The impedance bandwidth of the patch antenna along with the proposed metamaterial structure at 2.478GHz is improved by 20.4MHz and return loss is reduced by 20.128dB. At 2.919GHz the impedance bandwidth is improved by 25.4MHz and return loss is reduced by 19.564dB. For verifying that the proposed metamaterial structure possesses Negative values of Permeability and Permittivity within the operating frequency ranges, Nicolson-Ross-Weir method (NRW) has been employed. For simulation purpose CST-MWS Software has been used.
Science Publishing Corporation
2012-07-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/124
10.14419/ijet.v1i3.124
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 205-216
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/124/135
oai:ojs.pkp.sfu.ca:article/125
2014-11-13T03:10:00Z
ijet:ART
Design of Double-E Shaped Metamaterial Structure with Negative µ and ? for Enhancement of Patch Antenna Parameters, “This paper has been withdrawn”
Garg, Bimal
Chitransh, Tilak
Samadhiya, Ankit
“This paper has been withdrawn”
Science Publishing Corporation
2012-07-10
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/125
10.14419/ijet.v1i3.125
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 256-265
2227-524X
10.14419/ijet.v1i3
en
oai:ojs.pkp.sfu.ca:article/126
2014-11-13T03:10:02Z
ijet:ART
Tunable Liquid Dielectric Antenna
Rajoriya, Kamal Raj Singh
Singhal, P.K.
This paper presents on modified the dielectric properties of liquid with varying salinity that was based on monopole structure. Dielectric resonator antennas (DRAs) can be made with a wide range of materials and allow many excitation methods [2]. Pure water does not work at high frequency (> 1 GHz) but increase in the salinity of water modifies the dielectric properties of water. Here proposed antenna shows that when the salinity increases in form of molar solution, the antenna was tuned at different frequency with increases return loss.
Science Publishing Corporation
2012-07-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/126
10.14419/ijet.v1i3.126
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 223-230
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/126/139
oai:ojs.pkp.sfu.ca:article/133
2014-11-13T03:10:03Z
ijet:ART
Design a Microstrip Band Pass Filter for 6 GHz, “This paper has been withdrawn”
Jadaun, Veerendra Singh
sharma, Pavan
GUPTA, HEMANT
Mahor, Devesh Kumar
This paper has been withdrawn.
Science Publishing Corporation
2012-07-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/133
10.14419/ijet.v1i3.133
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 217-222
2227-524X
10.14419/ijet.v1i3
oai:ojs.pkp.sfu.ca:article/134
2014-11-13T03:10:05Z
ijet:ART
Design & Investigation of Five Element Liquid yagi uda antenna at L-band(1Ghz)applications
patidar, Deepak kumar
Singhal, P.K
Gupta, Hemant Kumar
Prjapati, Rajkumar
The purpose of this paper is to design a liquid yagi uda antenna at 1 GHz for L-band Application. The designing formulas and structure were discussed. The antenna characteristics like return loss with different liquids are filled in the all the yagi elements were also discussed in this paper.
Science Publishing Corporation
2012-07-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/134
10.14419/ijet.v1i3.134
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 250-255
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/134/145
oai:ojs.pkp.sfu.ca:article/137
2014-11-13T03:10:07Z
ijet:ART
A new approach to solving the time-cost trade-off problem based on the genetic algorithm and fuzzy theory
Pour, Nasser Shahsavari
Ghamginzadeh, Arman
Pour Kheradmand, Mansoor
Time and cost are two important and controllable objectives in project structures which are considerably dependent on each other. Recently, beneficiaries’ demands for cost and time reduction in completing a project have been increased. This study proposes a new method for time-cost trade off problem (TCTP) in uncertainty condition. To solve the model a multi objective genetic algorithm has been integrated with fuzzy theory. Efficiency of this algorithm is demonstrated through an existing case example from the literature. Finally to make the algorithm more efficient the existing parameters in the model have been set through Taguchi method.
Science Publishing Corporation
2012-07-08
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/137
10.14419/ijet.v1i3.137
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 238-249
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/137/143
oai:ojs.pkp.sfu.ca:article/141
2014-11-13T03:10:08Z
ijet:ART
Generation of Bio-electricity by Microbial Fuel Cells
Khan, Maksudur R.
Karim, M. R.
Amin, M. S. A.
Renewable energy is an increasing need in our society. Microbial fuel cell (MFC) technology represents a new technology for the regeneration of electricity from what would otherwise be considered waste and can be a vital candidate for energy in this respect. Electricity directly generated by using bacteria while accomplishing wastewater treatment in MFC processes. The present study deals with performance of proton exchange membrane and cation exchange resin for ion transfer. The effect of dimension of Resin Bridge on electricity generation and COD removal was reported. A maximum voltage of 10.5 mV was observed at 400ppm of KMnO4 along with 400ml of dairy in an anode chamber. Average COD removal was in the range of 70% to 90%.
Science Publishing Corporation
2012-07-08
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/141
10.14419/ijet.v1i3.141
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 231-237
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/141/141
oai:ojs.pkp.sfu.ca:article/142
2014-11-13T03:10:09Z
ijet:ART
Monopole Antenna with Modify Ground Plane
rajoriya, kamal raj singh
Singhal, P.K.
This paper presents on modified the ground plane of monopole antenna with varying the shape and length. Basically the length of ground plane of monopole antenna is equal and greater than ?/4. Here analyzed a different ground plane of monopole antenna that is provided an efficient bandwidth with sufficient return loss.
Science Publishing Corporation
2012-07-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/142
10.14419/ijet.v1i3.142
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 266-270
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/142/153
oai:ojs.pkp.sfu.ca:article/147
2014-11-13T03:10:11Z
ijet:ART
Optimization a new mathematical model of hybrid flow shop work order problem by the Genetic Algorithm
Pour, Nasser Shahsavari
Asadi, Hamed
Kheradmand, Mansoor
In competitive business, one of the challenges of management in industrial units is reducing the prime cost. Hybrid flow shop is one of the common production environments which lead to a significant decrease in production costs if it has a good and appropriate scheduling in production. Hybrid flow-shop problems overcome one of the limitations of the classical flow-shop model by allowing parallel processors at each stage of task Processing. In this paper we study the hybrid flow shop work order problems. A brief enumeration of the essential constraints that characterize this kind of organization is given. Problem is minimizing the production and inventory cost in Hybrid flow-shop organization. To solve problem we used the genetic algorithm to obtain the minimum of production cost. An illustrative example explains in detail the feature of the proposed model.
Science Publishing Corporation
2012-07-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/147
10.14419/ijet.v1i3.147
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 192-204
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/147/134
oai:ojs.pkp.sfu.ca:article/161
2014-11-13T03:10:17Z
ijet:ART
Overview of Pakistan's Electricity Crisis, Generation-Mix and Renewable energy scenarios
Awan, Kamran Yousaf
Rashid, Abdul
Electricity is a basic need of the modern world. It is impossible for an economy to sustain without electricity. Pakistan, despite having the enormous energy resources, is facing acute shortage of Electricity. The Country’s electricity demand is rising at the rate of 11% annually, while incremental rate of production is fairly flat. Presently, only 15055MW of Electric Power is being generated while peak demand has reached up to 23953MW. Therefore, nation has to strive for meeting the deficiency of 8899 MW. Installed Power Generation Capacity of Pakistan is approximately 19,855 MW among which 67.2% is generated from thermal sources (oil and gas), 29.4% from hydel, 3.3% from nuclear and 0.1% from coal. Due to increased cost of petroleum products, slow development of hydel and nuclear power generation and negligible development of coal power generation, Country is facing severe electricity crisis. This article provides the overview of electricity shortage, problems associated with energy-mix used for power generation and root causes of electricity shortage in Pakistan. It also highlights the importance and availability of Pakistan’s indigenous energy resources, which can be economically used for electric power generation.
Science Publishing Corporation
2012-08-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/161
10.14419/ijet.v1i4.161
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 321-334
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/161/212
oai:ojs.pkp.sfu.ca:article/163
2014-11-13T03:10:18Z
ijet:ART
A High Gain & Wide Band Rectangular Microstrip Patch Antenna loaded with “Interconnected SRR” Metamaterial Structure
Singhal, Pramod
Garg, Bimal
Communication applications require wide band and highly directive planner antennas. For such requirement this work deals with the analysis and simulation of a rectangular microstrip patch antenna loaded with “INTERCONNECTED SRR” metamaterial structure at a height of 3.2mm from the ground plane. The work also investigates the potential properties of the proposed metamaterial structure. The proposed Antenna is designed at a operating frequency of 2.75GHz to meet S-Band (2-4GHz) applications. By loading “Interconnected SRR” metamaterial structure with the rectangular patch antenna at a height of 3.2mm, the antenna’s bandwidth is found to be increased up to 378MHz and return loss is reduced to -42.2dB i.e. the potential properties like return loss, bandwidth, directivity and total efficiency of the proposed antenna increases to a great extent in comparison to the rectangular patch antenna alone. Double Negative properties of metamaterial have been proved by Nicolson-Ross-weir (NRW) method.
Science Publishing Corporation
2012-08-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/163
10.14419/ijet.v1i4.163
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 335-346
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/163/214
oai:ojs.pkp.sfu.ca:article/186
2014-11-13T03:10:20Z
ijet:ART
Digital design and optimization of higher order adaptive system using Continuous genetic algorithm
yadav, vijay
bhadauria, sarita singh
An algorithm for design and optimization of higher order adaptive system are presented in this paper. In this work, the algorithm applied on the continuous search space parameter rather than discrete search space parameter. A new continuous genetic operator such that Rank based selection, Normal crossover and mutations are used to improve the rate of convergence and solution quality has been proposed.
Science Publishing Corporation
2012-08-08
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/186
10.14419/ijet.v1i4.186
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 290-297
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/186/186
oai:ojs.pkp.sfu.ca:article/201
2014-11-13T03:10:12Z
ijet:ART
Smart Artificial Intelligence Computerized Models for Shelf Life Prediction of Processed Cheese
Goyal, Sumit
Goyal, Gyanendra Kumar
Linear Layer (Design) and multiple linear regression artificial intelligence computerized models were developed for predicting shelf life of processed cheese stored at 7-8ºC. Mean Square Error, Root Mean Square Error, Coefficient of Determination and Nash - Sutcliffo Coefficient were applied for comparing the prediction ability of the developed models. The modelling results showed excellent agreement between the experimental data and predicted values with a high determination coefficient, suggesting that the Linear Layer (Design) and MLR models are very efficient in predicting the shelf life of processed cheese stored at 7-8oC.
Science Publishing Corporation
2012-08-04
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/201
10.14419/ijet.v1i3.201
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 281-289
2227-524X
10.14419/ijet.v1i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/201/174
oai:ojs.pkp.sfu.ca:article/228
2014-11-13T03:10:21Z
ijet:ART
Enhancing the Performance of Microstrip Circuit Using Defected Ground Structure
Mahor, Devesh Kumar
Verma, Atal
Jadaun, Veerendra Singh
Sharma, Pavan Kumar
This paper focuses how to enhance the performance of microstrip circuits using DGS. A DGS is a defected ground structure where the ground plane metal of a microstrip circuit is intentially modified to enhance performance. Finally, the main application of DGS in microwave technology fields are summarized and the evolution trend of DGS is given.
Science Publishing Corporation
2012-08-19
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/228
10.14419/ijet.v1i4.228
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 347-351
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/228/216
oai:ojs.pkp.sfu.ca:article/234
2014-11-13T03:10:22Z
ijet:ART
Yagi-Uda Antenna For L-Band Frequency Range
Sharma, Gulshan
Sharma, Anand N.
Duvey, Ashish
Singhal, P. K.
A yagi-uda antenna for L-band (1- 2GHz) frequency range is presented. The designing formulas and related antenna characteristics such as return loss, radiation pattern and gain were also discussed in this paper.
Science Publishing Corporation
2012-08-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/234
10.14419/ijet.v1i4.234
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 315-320
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/234/208
oai:ojs.pkp.sfu.ca:article/241
2014-11-13T03:10:24Z
ijet:ART
Microstrip Planner Five-element Yagi-Uda Antenna for ISM Band Application, “This paper has been withdrawn”
patidar, Deepak
Singhal, P.K
Gupta, Hemant Kumar
Sharma, Gulshan
This paper has been withdrawn.
Science Publishing Corporation
2012-09-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/241
10.14419/ijet.v1i4.241
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 395-400
2227-524X
10.14419/ijet.v1i4
oai:ojs.pkp.sfu.ca:article/259
2014-11-13T03:10:25Z
ijet:ART
A Job Scheduling Algorithm for 2 - Machine Flow Shop Problem, “This paper has been withdrawn”
Odior, Andrew
Oyawale, Festus
This paper has been withdrawn.
Science Publishing Corporation
2012-08-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/259
10.14419/ijet.v1i4.259
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 305-314
2227-524X
10.14419/ijet.v1i4
oai:ojs.pkp.sfu.ca:article/260
2014-11-13T03:10:27Z
ijet:ART
A Wideband Printed Antenna for Covering Major Cellular Bands with a C- Shaped Patch
Misra, P.
Tripathy, A.
In this paper the design of a new multistandard antenna is proposed suitable for major cellular bands. A C-shaped radiator with a microstrip feed line is proposed which supports major cellular communication band like AWS, DCS, DECT, PCS, PHS, 3G, UMTS, DSR, Wi-Bro, ISM, and DMB in the range of 1.7- 2.9 GHz. The designed antenna is simulated using CST Microwave Studio to achieve such wide frequency coverage. The simulation results of the designed structure in terms of return loss, VSWR and radiation pattern are presented.
Science Publishing Corporation
2012-08-27
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/260
10.14419/ijet.v1i4.260
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 362-367
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/260/240
oai:ojs.pkp.sfu.ca:article/270
2014-11-13T03:10:28Z
ijet:ART
An Approach for Solving Linear Fractional Programming Problems
Odior, Andrew Oyakhobo
Linear fractional programming problems are useful tools in production planning, financial and corporate planning, health care and hospital planning and as such have attracted considerable research interest. The paper presents a new approach for solving a fractional linear programming problem in which the objective function is a linear fractional function, while the constraint functions are in the form of linear inequalities. The approach adopted is based mainly upon solving the problem algebraically using the concept of duality and partial fractions and an example is given to clarify the developed method.
Science Publishing Corporation
2012-08-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/270
10.14419/ijet.v1i4.270
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 298-304
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/270/205
oai:ojs.pkp.sfu.ca:article/272
2014-11-13T03:10:14Z
ijet:ART
Improvement in Parameters of Patch Antenna By Using “Hybrid Shaped” Metamaterial Structure, “THIS PAPER HAS BEEN WITHDRAWN”
Garg, Bimal
Shrivastava, Himanshu
Kumar, Prem
“THIS PAPER HAS BEEN WITHDRAWN”
Science Publishing Corporation
2012-07-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/272
10.14419/ijet.v1i3.272
International Journal of Engineering & Technology; Vol. 1 No. 3 (2012); 271-280
2227-524X
10.14419/ijet.v1i3
en
oai:ojs.pkp.sfu.ca:article/280
2014-11-13T03:10:30Z
ijet:ART
Constructal Hypothesis for Mechanical Deformation
Chatterjee, Atanu
Mild Steel specimen, when subjected to tensile forces shows considerable plastic deformation before fracture. A cross-section of the fractured specimen has the familiar cup – cone form and shows traces of a three – dimensional parabolic geometry. The morphing of the steel specimen from a volume to a point as a spontaneous, entropy producing or energy dispersing process is analysed using the Constructal law.
Science Publishing Corporation
2012-08-22
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/280
10.14419/ijet.v1i4.280
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 352-355
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/280/222
oai:ojs.pkp.sfu.ca:article/287
2014-11-13T03:10:31Z
ijet:ART
Designing Microstrip Low Pass Filter In ISM Band For Rectenna System
Sharma, Pavan
Jadaun, Veerendra
Mahor, Devesh
Verma, Atal
The filter is required in all RF-communication techniques. Low Pass Filters play an important role in wireless power transmission systems. Transmitted and received signals have to be filtered at a certain frequency with a specific bandwidth. In this paper the design of filter is done in the ISM (Industrial, Scientific and Medical) band whose frequency lies between 1.55GHz- 3.99GHz. After getting the specifications required, we realized the filter structure with the help of CST-MW software.
Science Publishing Corporation
2012-08-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/287
10.14419/ijet.v1i4.287
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 356-361
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/287/224
oai:ojs.pkp.sfu.ca:article/305
2014-11-13T03:10:32Z
ijet:ART
Comparison of different orders optimization using Continuous Genetic Algorithm “THIS PAPER HAS BEEN WITHDRAWN”
Yadav, Vijay
Bhadauria, S.S.
“THIS PAPER HAS BEEN WITHDRAWN”
Science Publishing Corporation
2012-08-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/305
10.14419/ijet.v1i4.305
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 368-376
2227-524X
10.14419/ijet.v1i4
en
oai:ojs.pkp.sfu.ca:article/322
2014-11-13T03:10:34Z
ijet:ART
Study on Dual-Concentric-Core Dispersion Compensating Photonic Crystal Fiber
Habib, Md. Selim
Habib, Md. Samiul
Razzak, S.M.A
The dual-concentric-core photonic crystal fiber composed of pure silica and air is proposed in this paper. Around 1.55 ?m, it exhibits a negative chromatic dispersion as high as –20000 ps/(km.nm). The finite element method with perfectly matched absorbing layers boundary condition is used to investigate the guiding properties. The explanations to propagation states of the fundamental mode and the second mode are given elaborately
Science Publishing Corporation
2012-09-04
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/322
10.14419/ijet.v1i4.322
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 377-383
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/322/298
oai:ojs.pkp.sfu.ca:article/330
2014-11-13T03:10:35Z
ijet:ART
Finite Element Analysis of Disc Insulator Type and Corona Ring Effect on Electric Field Distribution over 230-kV Insulator Strings
Akbari, Ebrahim
Mirzaie, Mohammad
Rahimnejad, Abolfazl
Asadpoor, Mohammad Bagher
Insulator strings are widely used in power systems for the dual task of mechanically supporting and electrically isolating the live phase conductors from the support tower. However, the electric field and voltage distribution of insulator string is uneven which may easily lead to corona, insulators’ surface deterioration and even flashover. So the calculation of the electric field and voltage distribution along them is a very important factor in the operation time. Besides, despite the variety of insulator material and profiles, no remarkable endeavor regarding their impacts upon electric field distribution has been made so far. In this paper, three-dimensional Finite Element Method (3-D FEM) software–Maxwell is employed to simulate several 230-kV insulator strings with various types of porcelain and glass disc insulators and the electric field along them were compared, to investigate the effect of insulator types on electric field distribution.
Science Publishing Corporation
2012-09-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/330
10.14419/ijet.v1i4.330
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 407-419
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/330/314
oai:ojs.pkp.sfu.ca:article/335
2014-11-13T03:10:37Z
ijet:ART
Biodiesel from Sesame oil: Base catalysed transesterification
Ferdous, Kaniz
Uddin, Mohammad Rakib
A process for the production of methyl ester from Sesame oil containing 6.1% free fatty acid (FFA) for the use as a biodiesel was studied. These studies were carried out on transesterification reaction of Sesame oil with methanol to produce biodiesel. The reaction parameters such as Methanol/Oil molar ratio, catalyst concentration and reaction time were optimized for the production of sesame oil methyl ester (SOME). Conversion of triglyceride has been monitored from viscosity measurement and also by measuring produced glycerin concentration. Pseudo first order kinetic model has been proposed for the transesterification of Sesame oil to biodiesel and the data are fitted with the model to evaluate the kinetic parameters. Biodiesel properties such as cetane number, kinematic viscosity, flash point, pour point, cloud point are measured and compared with biodiesel and petro-diesel standard.
Science Publishing Corporation
2012-09-08
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/335
10.14419/ijet.v1i4.335
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 420-431
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/335/317
oai:ojs.pkp.sfu.ca:article/339
2014-11-13T03:10:38Z
ijet:ART
Comparison of Performance of Magneto Hydrodynamics Generator in Presence of Hall Effect
Khatibzadeh, Ahmadali
Alizadeh Pahlavani, Mohammad reza
Studying of high-temperature plasmas exposed to strong electromagnetic ?eld is Magneto Hydrodynamics. Also, it is used to obtain an electrical power. This paper proposes a simple model of MHD generator. Moreover, efficiency of different configuration of this generator is obtained by this model. Also, this paper compares different configurations of Faraday generator with the Hall generator based on their isotropic efficiency. Moreover, this model considers the effect of Hall Effect (Ion slip) on the efficiency. This analysis proof that Hall Effect decrease the efficiency in Faraday generator but increase the efficiency in the Hall generator.
Science Publishing Corporation
2012-09-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/339
10.14419/ijet.v1i4.339
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 472-482
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/339/361
oai:ojs.pkp.sfu.ca:article/349
2014-11-13T03:10:40Z
ijet:ART
Zigzag Pattern Metamaterial Structure With Rectangular Patch Antenna “This paper has been withdrawn”
Bhartiya, Vishav Gaurav
Shrivastava, Laxmi
“This paper has been withdrawn”
Science Publishing Corporation
2012-09-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/349
10.14419/ijet.v1i4.349
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 401-406
2227-524X
10.14419/ijet.v1i4
en
oai:ojs.pkp.sfu.ca:article/353
2014-11-13T03:10:41Z
ijet:ART
DWT-based Illumination Normalization and Feature Extraction for Enhanced Face Recognition
K, Manikantan
Shet, Milan S
Patel, Minal
S, Ramachandran
Face recognition (FR) under varying lighting conditions is challenging, and exacting illumination invariant features is an effective approach to solve this problem. In this paper, we propose to utilize Discrete Wavelet Transform (DWT) for normalizing the illumination variance in images as well as for feature extraction. Individual stages of the FR system are examined and an attempt is made to improve each stage. A Binary Particle Swarm Optimization (BPSO) based feature selection algorithm is used to search the feature space for the optimal feature subset. Experimental results, obtained by applying the proposed algorithm on YaleB and Color FERET face databases, show that the proposed system outperforms other FR systems. A significant increase in the recognition rate and a substantial reduction in the number of features is observed. Dimensionality reduction obtained is more than 99% for both YaleB and Color FERET databases.
Science Publishing Corporation
2012-09-19
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/353
10.14419/ijet.v1i4.353
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 483-504
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/353/364
oai:ojs.pkp.sfu.ca:article/359
2014-11-13T03:10:42Z
ijet:ART
Design of Broadband Dispersion Compensating Photonic Crystal Fiber
Habib, Md. Selim
Habib, Md. Samiul
Razzak, S.M.A
Khan, M.A.G
This paper presents a triangular-lattice photonic crystal fiber for broadband dispersion compensation. The finite element method with perfectly matched absorbing layers boundary condition is used to investigate the guiding properties. The designed dispersion compensating fiber shows that it is possible to obtain a larger negative dispersion coefficient of ?360 ps/(nm.km) at 1.55 ?m, better dispersion slope compensation, better compensation ratio in the entire telecommunication (1460-1640 nm) band by using a modest number of design parameters and very simple cladding design.
Science Publishing Corporation
2012-09-04
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/359
10.14419/ijet.v1i4.359
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 384-394
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/359/290
oai:ojs.pkp.sfu.ca:article/378
2014-11-13T03:10:44Z
ijet:ART
Optimization of Surface Roughness When Turning Polyamide using ANN-IHSA Approach
Madic, Milos
Markovi?, D.
Radovanovi?, M.
This study presents an approach by coupling artificial neural network (ANN) and improved harmony search algorithm (IHSA) to determine the optimum cutting parameter settings for minimizing surface roughness when turning of polyamide material. An ANN model surface roughness was developed in terms of cutting speed, feed rate, depth of cut, and tool nose radius using the data from the turning experiment conducted according to Taguchi’s L27 orthogonal array. The optimal cutting parameter settings were determined by applying the IHSA to the developed ANN surface roughness model. The results show that the proposed optimization approach can be efficiently used for optimization of cutting parameter settings when turning polyamides. Although determining ANN and IHSA parameters is quite complex and problem dependent, it can be simplified by using Taguchi’s experimental design as in this study.
Science Publishing Corporation
2012-09-10
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/378
10.14419/ijet.v1i4.378
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 432-443
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/378/329
oai:ojs.pkp.sfu.ca:article/383
2014-11-13T03:10:45Z
ijet:ART
Calculation of Resonating Frequency of an Equilateral Triangular Microstrip Antenna Using Artificial Neural Network, “This paper has been withdrawn”
Gupta, Prachi
Singhal, P.K.
Gupta, Ritambhra
This paper has been withdrawn.
Science Publishing Corporation
2012-09-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/383
10.14419/ijet.v1i4.383
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 444-452
2227-524X
10.14419/ijet.v1i4
oai:ojs.pkp.sfu.ca:article/388
2014-11-13T03:10:47Z
ijet:ART
Numerical Simulation of Solitary Waves by SPH Method and Parametric Studies on the Effect of Wave Height to Water Depth Ratio
Ghadimi, Parviz
Abtahi, Shahryar
Dashtimanesh, Abbas
Numerical simulation of fluid flow phenomena, including complicated free surface deformation, has been a main research interest for many authors. In this context, using mesh based methods has been a common choice in the past decades. However, in the recent years, Smoothed Particle Hydrodynamics (SPH) as a Lagrangian meshless method has been utilized in many of applications. In the present article, a two dimensional solitary wave on a beach is generated and the effect of various wave heights to water depth ratios on solitary wave generation are studied. Furthermore, condition in which wave breaking occurs is also considered. Finally, the results of SPH simulations are compared against the available results in the literature and it is shown that Solitary wave profile simulated by SPH is in good agreement with experimental data.
Science Publishing Corporation
2012-09-12
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/388
10.14419/ijet.v1i4.388
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 453-465
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/388/338
oai:ojs.pkp.sfu.ca:article/412
2014-11-13T03:10:48Z
ijet:ART
Novel Quad-band Patch Antenna Design for Wireless Communications in 2.4, 5.2, 5.6 and 5.8 GHz Bands using Genetic Algorithm Optimization
jayasinghe, J.M.J.W.
Uduwawala, D.N.
This paper presents the design of a novel quad band patch antenna for wireless communications in 2.4, 5.2, 5.6 and 5.8 GHz Bands. Antennas operating in these bands are available in various sizes and used in small hand-held devices as well as in wireless local area networks. A substrate with dielectric constant 3.2 and thickness 3.175mm is used for the design. The patch dimensions (40 × 30 mm) are similar to that of the conventional rectangular patch for the center frequency of the lowest frequency band which is 2.4 GHz. The antenna is fed by a 50? coaxial cable. Genetic algorithm optimization (GAO) is used to optimize the patch geometry and feed position. Simulations are carried out by using HFSS. The optimized antenna resonates at 2.4 GHz with fractional bandwidth of 4.1% and at 5 GHz bands with fractional bandwidth of 33.5%.
Science Publishing Corporation
2012-09-13
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/412
10.14419/ijet.v1i4.412
International Journal of Engineering & Technology; Vol. 1 No. 4 (2012); 466-471
2227-524X
10.14419/ijet.v1i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/412/340
oai:ojs.pkp.sfu.ca:article/423
2014-11-13T03:10:50Z
ijet:ART
Establishment of porosity and permeability models correlation to validate E.coli Transport to ground water aquifers: Rivers state of Nigeria
Eluozo, Solomon Ndubuisi
Ademiluyi, J. O.
The evaluation of porosity and permeability models correlation on the migration of e.coli transport in deltaic environment has been assessed. This is to validate the model generated from the experimental analysis in the study location, this model are generated through the experimental results from both parameters, the theoretical values from both parameters confirm that the models generated is a bench mark that can be applied as a design criteria in preventing the migration of e.coli to ground water aquifer, it has also confirm that it plays a major role in fast transport of e.coli in deltaic environment, the figures displayed shows the level of deposition of geological formation in the study area, the study has also explain the migration of the microbes influenced by porosity and permeability, the results from the experiment that generated theoretical values for porosity and permeability were evaluated to see their relationship in terms of influence on the behaviour of the microbial transport as a system known as plug flow. the results has been confirm that without any inhibition from any other deposition, e.coli will be in progressive phase condition, therefore it is advise that the models generated from the study area should be applied in design of bore hole in other to prevent the pollution emanating from e.coli in the study area, finally the relationships verified from the study has a fit to the existing geological history of the study area that is predominant of alluvium deposition, this condition ascertain the reality of the experimental results generated from the study area ,it should be applied to avoid water related diseases and the threat of life
Science Publishing Corporation
2012-11-20
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/423
10.14419/ijet.v2i1.423
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 17-24
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/423/458
oai:ojs.pkp.sfu.ca:article/425
2014-11-13T03:10:51Z
ijet:ART
Predictive models to determine the behavior of plastic and liquid limit of Lateratic soil for Raod construction at Egbema: Imo state of Nigeria
Eluozo, Solomon Ndubuisi
Nwaobakata, C.
Predictive values to determine the behaviour of plastic and liquid of lateritic soil for road design and construction has been developed, this two parameters has a relationship in term of soil classification through their laboratory results, both parameters sample were subjected to through laboratory analysis for several locations, the laboratory results of both parameters were plotted to determine there behavious and limits, the results generated equations at various locations, the equations were resolved and it generated theoretical values, the model values displayed there relationship on the classification of soil for road construction. The implementation of a laboratory testing proceedure is to classify subgrade material and assess sustain properties and moisture sensitivity (heavy, collapse, softening) that can influence long-term pavement performance. Testing implementation consists of classification testing, these are (i.e., gradation analysis, Atterberg Limits and sulfate tests). Generated predictive models producing theoretical values, are engineering properties of soil testing for various parameters (i.e., swell/consolidation, R-value, unconfined compressive strength, California Bearing Ratio, and Resilient Modulus Tests). This are also design parameters that should generate predictive models that can be applied as design parameter in the study area, the study is imperative because predictive models generated and validated has ascertain proof of the workability of the models as design parameter in design of flexible pavements in the study location.
Science Publishing Corporation
2012-11-20
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/425
10.14419/ijet.v2i1.425
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 25-31
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/425/459
oai:ojs.pkp.sfu.ca:article/430
2014-11-13T03:10:53Z
ijet:ART
Modeling of pheratic aquifers on E, coli transport influenced by preconsolidation and compressibility of soil
Eluozo, solomon Ndubuisi
The rate of pollution on soil are the major problem of ground water contamination in the study area, the influence from preconsolidation and compressibility of soil influence on E.coli transport has been carried out. This is to determine the rate of influence on E.coli transport in pheratic aquifers, mathematical model were developed to monitor the influence on the preconsolidation and compressibility of soil on microbial transports, experimental analysis were also carried out through a standard column experimental analysis, ten samples were collected in a drilling site at interval of three metres each for several location, the effluent discharge from the lower end of the column were collected and subjected to a thorough analysis, the theoretical values were compared with experimental values, and both values compared faviourably well. This study has explained the transport of E.coli base on the level of concentration generate from aquiferious zone. The study has reveal that the exploration of ground water should be design with its criteria’s to prevent the wild spread of water pollution emanating from the E.coli transport in the study areas, the preconsolidation and compressibility of soil were found to be insignificant on the transport of the microbes, the preconsolidation and its rate compressibility of soil could not reduce the transport of E.coli on a natural state.
Science Publishing Corporation
2012-11-16
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/430
10.14419/ijet.v2i1.430
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 1-11
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/430/456
oai:ojs.pkp.sfu.ca:article/483
2014-11-13T03:10:54Z
ijet:ART
Low Power and High Speed D-Latch Circuit Designs Based on Carbon Nanotube FET
Talebipoor, Neda
Keshavarzian, Peiman
Irannejad, Behzad
In this paper we propose low power and high speed D-latche circuits base on carbon nanotube field effect transistor. D-latches are the important state-holding elements and systems performance enhancement will be achieved by improving the flip-flop latches structure. The circuit designs are simulated by Hspice .In this paper the consumption result of the circuit parameters such as delay, power and PDP for our three different D-latch circuit design in various voltages and different temperatures.
Science Publishing Corporation
2012-11-16
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/483
10.14419/ijet.v2i1.483
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 12-16
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/483/457
oai:ojs.pkp.sfu.ca:article/505
2014-11-13T03:10:56Z
ijet:ART
Design Of Near Zero Ultra-Flattened Chromatic Dispersion Highly Non Linear Holey Fiber In Tele Communication Band
Rahman, Mahbubur
Mostazir, A.H. Md.
Alam, M. A.
Habib, Md. Samiul
We propose a four-ring hexagonal holey fiber (HF) which exhibits near zero ultra-flattened chromatic dispersion and nonlinear property simultaneously in a modest number of rings. The finite element method with perfectly matched layers boundary condition is used to investigate the guiding properties. A four ring HF with flattened dispersion of 0.85ps/nm/km from 1.14 to 1.60 µm wavelength range, 21.34W-1km-1 nonlinear coefficient and splice loss 3.82 dB at 1.55µm is numerically demonstrated.
Science Publishing Corporation
2013-02-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/505
10.14419/ijet.v2i1.505
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 70-76
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/505/530
oai:ojs.pkp.sfu.ca:article/534
2014-11-13T03:10:57Z
ijet:ART
Measurement of electron number density and temperature of laser-induced Silver plasma
Musadiq, Muhammad
Iqbal, Munawar
Amin, Nasir
Jamil, Yasir
Naeem, M. Asif
Shahzad, Hafiz Akif
Silver (Ag) plasma generated by second harmonics (532 nm) of a Nd:YAG laser has been investigated at 17.6 mJ and 88.6 mJ energy level. The excitation temperature was determined from the Boltzmann plot method of the transition (3D3 -3P2) at 243.779 nm, (2S1/2 - 2P3/2) at 328.068 nm, (2S1/2 - 2P1/2) at 338.289 nm, (2P1/2 - 2D3/2) at 520.907 nm and (2P3/2 - 2D5/2) at 546.550 nm, while the Stark broadening (SB) method was used to measure the Electron Number Density (END) of 2P3/2 - 2S1/2 transition at 827.351 nm. The spatial behavior of the Electron number density (END) and Electron Temperature (ET) was measured at ambient air pressures at different energy level and distance ranging form 0-4.5 mm form the target metal. The ET were found to be varies from 17895 K to 10593 K, while END was found to be in the ranges of 2.229 ´ 1015 to 6.44 ´ 1014 cm-3 and 1.76 ´ 1016 to 1.893 ´ 1015 cm-3 for 17.6 mJ and 88.6 mJ energy, respectively. The relationship of END and ET found directly related to laser irradiance, while they were inverse to the distance form the target material surface to laser beam source.
Science Publishing Corporation
2012-12-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/534
10.14419/ijet.v2i1.534
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 32-43
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/534/480
oai:ojs.pkp.sfu.ca:article/569
2014-11-13T03:10:59Z
ijet:ART
Design and Development of a tomato Slicing Machine
Salaudeen, Kamaldeen Oladimeji
E. F., Awagu
Principle of slicing was reviewed and tomato slicing machine was developed based on appropriate technology. Locally available materials like wood, stainless steel and mild steel were used in the fabrication. The machine was made to cut tomatoes in 2cm thickness. The capacity of the machine is 540.09g per minute and its performance efficiency is 70%.
Science Publishing Corporation
2012-12-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/569
10.14419/ijet.v2i1.569
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 57-62
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/569/495
oai:ojs.pkp.sfu.ca:article/571
2014-11-13T03:11:00Z
ijet:ART
Genetic Programs of Structural Evolution of Hybrid Electromechanical Objects
V. F., Shinkarenko
Iu, Gaidaienko
Al-Husban, Ahmad N
In this paper the interconnected genetic models defining algorithms of intrageneric synthesis of hybrid electromechanical structures are considered. The authors analyze the space of admissible crossing and define the variety of genetically admissible classes of hybrid structures. The recommendations about the use of models in problems of a structural prediction and innovative synthesis of new versions of hybrid electromechanical objects are given.
Science Publishing Corporation
2012-12-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/571
10.14419/ijet.v2i1.571
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 44-49
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/571/488
oai:ojs.pkp.sfu.ca:article/573
2014-11-13T03:11:02Z
ijet:ART
Effect of NSPRI tin-in-pot compared with pot-in-pot evaporative cooler on the stored fruits
Salaudeen, Kamaldeen Oladimeji
Uzoma, Anugwom
F.F, Olyemi
E.F, Awagu
The suitability of the humidity chambers known as Evaporative Cooling System (ECS) developed by Nigerian Stored Products Research Institute as storage structures for mangoes were compared for nine days between June-July 2012. Ambient and ECS Temperature throughout the storage period ranges between 27?C- 31?C and 20?C-27?C respectively, while the corresponding relative humidity was 51%-58% and 70%-81% respectively. Colour change and Weight loss were observed as a physical change to determine effect of each selected ECS on the stored mangoes. There is significant range of ripening in tin-in-pot which led to early deterioration of the stored mangoes. Pot –in-pot affects the freshness of the stored mangoes. The overall effectiveness of the tested ECS shows that tin-in-pot is better for the storage of mangoes since for five days, it retains the freshness of the stored mangoes but cannot be used for long due to its natural reaction with the stored fruits.
Science Publishing Corporation
2013-01-21
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/573
10.14419/ijet.v2i1.573
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 63-69
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/573/515
oai:ojs.pkp.sfu.ca:article/581
2014-11-13T03:11:04Z
ijet:ART
Strengthening of masonry structures using steel frames
Papalou, Angeliki
Many old masonry structures have not been maintained properly and have been left exposed to future seismic loading with only their exterior masonry walls. These structures can be strengthened using different techniques with the reversible ones being more appropriate for historic structures. The seismic behavior of masonry buildings left only with their perimeter walls and retrofitted using steel frames (a reversible technique) is investigated. The role of the connection of the steel frames with the masonry walls is analyzed. Linear elastic analysis is performed using the finite element method. The seismic resistance of the aforementioned buildings increases when there is a closed-spaced connection of the steel frame columns with the masonry walls. The connection of the masonry walls at the floor level with the interior structure is also beneficial to the building’s seismic behavior.
Science Publishing Corporation
2012-12-19
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/581
10.14419/ijet.v2i1.581
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 50-56
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/581/491
oai:ojs.pkp.sfu.ca:article/618
2014-11-13T03:11:19Z
ijet:ART
Excavation method in Goushfill mine
Cheraghi Seifabad, Masoud
Beheshti, Saeed
This research tries to investigate the geomechanical parameters of rock mass in Goushfill mine. Using available cores, and studying existing methods, logs, and careful assessment of samples, four types of rock mass in Goushfill mine, shale, mineralized shale, dolomite and mineralized dolomite are classified, on the basis of GSI, RMR and Q-system. The physical parameters, friction angle and cohesion of rock mass are measured in the rock mechanics lab of Isfahan University of Technology. The excavation method is defined according to the results of the study and thus parameters of the excavation are specified.
Science Publishing Corporation
2013-07-29
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
application/msword
http://www.sciencepubco.com/index.php/ijet/article/view/618
10.14419/ijet.v2i3.618
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 225-229
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/618/792
http://www.sciencepubco.com/index.php/ijet/article/view/618/16950
oai:ojs.pkp.sfu.ca:article/656
2014-11-13T03:11:07Z
ijet:ART
Thermal effect on unsteady flow of a dusty visco-elastic fluid between two parallel plates under different pressure gradients
R, Madhura K.
G, Kalpana
This article describes the effect of thermal diffusion on a flow of dusty viscous incompressible fluid which is electrically conducting and the flow is between two vertically heated, porous, parallel plates with heat source or sink. Variable separable and Laplace transform techniques are used to attain the solution of the mathematical equations. The effect of the temperature is examined for different values of Prandtl number (Pr). The consequences of the concentration is observed for different values of thermal diffusion parameter (Td). The velocity profile for the flow of fluid and the dust particles are discussed for different values of Td and chemical reaction parameter (cr). In addition to that, the solutions are exhibited graphically.
Science Publishing Corporation
2013-03-13
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/656
10.14419/ijet.v2i2.656
International Journal of Engineering & Technology; Vol. 2 No. 2 (2013); 88-99
2227-524X
10.14419/ijet.v2i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/656/586
oai:ojs.pkp.sfu.ca:article/669
2014-11-13T03:11:09Z
ijet:ART
Effects of Controllable Blasting Variables on Number of Boulders Generated after Blasting in Ratcon and NSCE Quarries, Ibadan, Oyo State, Nigeria
LAWAL, Abiodun Ismail
Muili, Akande Jide
The research work examines the effects of controllable blasting variables on number of boulders generated after blasting. The objective of the research was achieved through collection of data related to blasting which are drill hole depth, drill hole diameter, burden, spacing, average charge per hole, and specific charge. The collected data were analysed statistically using both Microsoft Excel Software and SPSS Software. The result of the analysis reveals that all the input controllable blasting variables which are drill hole diameter (X1), drill hole depth (X2), hole spacing (X3), burden (X4), average charge per hole (X5), specific charge(X6) that participated as independent variables in the models are found to be significant and the R2 values obtained from the graph show a very strong correlation between the number of boulders generated after blasting and the input variables except that of drill hole diameter which shows a very weak correlation. The equation generated using the SPSS could be used to determine number of boulders generated after blasting.
Science Publishing Corporation
2013-04-28
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/669
10.14419/ijet.v2i2.669
International Journal of Engineering & Technology; Vol. 2 No. 2 (2013); 105-112
2227-524X
10.14419/ijet.v2i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/669/654
oai:ojs.pkp.sfu.ca:article/674
2014-11-13T03:11:05Z
ijet:ART
Modelling Workability of Asphalt concrete Performance at different Temperatures using A Statistical Model
Arshad, Ahmad Kamil
Diah J, Md
Khalil, Salah
In this study, a workability model is used to predict the values of Torque in relation to mix and compaction by Temperature, Gyration, Resilient Modulus, Stability and Flow. The data are obtained from workability-measuring devices developed by the authors. The value of R2 implies that about 95 % variation in the values of Torque can be explained by the variation in mixing and compaction according to Temperature, Gyration, and Resilient Modulus. The regression model as a whole shows that while the value of Torque is largely influenced by Compaction, Mixing Temperature and Gyration; Resilient Modulus, Stability and Flow are not significant determinants of workability. The paper recommends that the effect of workability on the performance of Asphalt concrete should be taken very seriously during the design.
Science Publishing Corporation
2013-03-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/674
10.14419/ijet.v2i1.674
International Journal of Engineering & Technology; Vol. 2 No. 1 (2013); 77-87
2227-524X
10.14419/ijet.v2i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/674/565
oai:ojs.pkp.sfu.ca:article/687
2014-11-13T03:11:10Z
ijet:ART
Theoretical considerations of machining with grinding wheels
Odior, Andrew Oyakhobo
Oyawale, Festus A
Oyedepo, Sunday O.
Aasa, Samson A
Grinding is one of the most versatile methods of removing material from machine parts by the cutting action of the countless hard and sharp abrasive particles of a revolving grinding wheel. It works by forcing the abrasive grains into the surface of the workpiece so that each grain cuts away a small bit of material in the form of chips. Abrasive grinding wheel is an expendable wheel that carries an abrasive compound on its periphery. They are made of small, sharp and very hard natural or synthetic abrasive minerals, bonded together in a matrix to form a wheel. The paper presents a review of some of the characteristics as well as theoretical considerations of operations of abrasive grinding wheel. The relationships among the various grinding parameters; the radial force f, the force on individual grit of grinding wheel F, velocity of grinding wheelg Vg, velocity of work piecew Vw, the wheel diameterg Dg, and the diameter of the work piece Dw were established for given grinding operations.
Science Publishing Corporation
2013-05-10
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/687
10.14419/ijet.v2i2.687
International Journal of Engineering & Technology; Vol. 2 No. 2 (2013); 126-133
2227-524X
10.14419/ijet.v2i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/687/679
oai:ojs.pkp.sfu.ca:article/773
2014-11-13T03:11:11Z
ijet:ART
Structural Analysis of Historic Masonries
Papalou, Angeliki
Stavroulaki, Maria E.
Several historic masonries have experienced severe damage and collapse due to lack of proper design and maintenance. Understanding of their behavior is essential for their survival. Multi-leaf walls, a special case that is often encountered in historic masonries, need special attention due to the complex geometry and its weak inner leaf. The behavior of historic masonries when subjected to different static load is investigated. An isolated multi-leaf wall is modeled using the finite element method. Multiple cases, varying the properties of the materials of the multi-leaf wall and loading conditions, are analyzed considering linear elastic behavior of the materials. It is found that the properties of the multi-leaf walls and the loads applied affect considerably the response of the structure.
Science Publishing Corporation
2013-04-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/773
10.14419/ijet.v2i2.773
International Journal of Engineering & Technology; Vol. 2 No. 2 (2013); 100-104
2227-524X
10.14419/ijet.v2i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/773/634
oai:ojs.pkp.sfu.ca:article/811
2014-11-13T03:11:13Z
ijet:ART
An novel architecture for information hiding using HMAC-MD5
Loganathan, Agilandeeswari
Krishnamoorthy, Brindha
Sunny, Stiffy
Kumaravel, Muralibabu
Communication in digital form has become the part of day today’s lifestyle, in certain moment communication is made secret to avoid others from knowing the information. By providing security to the sensitive data it is ensured that the user’s data is protected from viewing and accessing by others. In the current discussion about data security, Steganographic algorithm using two mediums has been discussed that involves image based encryption and converting to word file. The stage involving image based encryption uses HMAC-MD5 algorithm along with LSB steganography. LSB technique scatters the secret data which have to be protected over the entire image. Convert the embedded image in word file, so that the secret message is made unavailable to others who try to obtain the file. This method provides greater payload capacity along with higher image fidelity and thus make the proposed system is more robust against attacks.
Science Publishing Corporation
2013-05-17
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/811
10.14419/ijet.v2i2.811
International Journal of Engineering & Technology; Vol. 2 No. 2 (2013); 134-139
2227-524X
10.14419/ijet.v2i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/811/693
oai:ojs.pkp.sfu.ca:article/834
2014-11-13T03:11:14Z
ijet:ART
Applications of Support Vector Machines in the Exploratory Phase of Petroleum and Natural Gas: a Survey
Ccoicca, Yuri Javier
This paper presents an overview of support vector machines (SVM) as one of the most promising intelligent techniques for data analysis found in the published literature, as theoretical approaches and sophisticated applications developed for various research areas and problem domains. This work is an attempt to provide a survey of the applications of SVM for oil and gas exploration to professionals, researchers and academics involved with the hydrocarbons industry. The applications of SVM have been grouped and summarized in the different areas of the exploration phase, which can be used as a guide to assess the effectiveness of SVM over other data mining algorithms. It also provides a better understanding of the various applications that have been developed for an area that offers a glimpse of innovative applications in other domains of the industry.
Science Publishing Corporation
2013-05-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/834
10.14419/ijet.v2i2.834
International Journal of Engineering & Technology; Vol. 2 No. 2 (2013); 113-125
2227-524X
10.14419/ijet.v2i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/834/671
oai:ojs.pkp.sfu.ca:article/869
2014-11-13T03:11:16Z
ijet:ART
Haar wavelets approach of traveling wave equation- A plausible solution of lightning stroke model
Gopalakrishnan, Hariharan
Raman, R. Rajaraman
Kirthivasan, K. Kannan
This paper describes a traveling wave model for describing the lightning stroke by the Haar wavelet method (HWM) is proposed. Numerical example is included and illustrated for applicability and validity of the proposed method. The fundamental idea of Haar wavelet method is to convert the differential equations into a group of algebraic equations that involves a finite number of variables. The power of the manageable method is confirmed. The results show that the proposed way is quite reasonable when compared to exact solution. Moreover the use of Haar wavelets is found to be accurate, simple, fast, flexible, convenient, small computation costs and computationally attractive.
Science Publishing Corporation
2013-05-23
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/869
10.14419/ijet.v2i2.869
International Journal of Engineering & Technology; Vol. 2 No. 2 (2013); 149-156
2227-524X
10.14419/ijet.v2i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/869/709
oai:ojs.pkp.sfu.ca:article/889
2014-11-13T03:11:20Z
ijet:ART
Localization in Multiple Nearly-Identical Tuned Vibration Absorbers
Alsuwaiyan, Abdullah Saleh
The forced vibration of multiple nearly identical translational vibration absorbers is considered. Localization, where the amplitudes of vibration of a group of the absorbers can become relatively large as compared to those of the corresponding perfectly tuned system is investigated. In this work, imperfections amoung the absorbers are allowed and brought into the analysis through the stiffnesses of the absorbers' springs. Steady-state analysis of the mathematical model is used to obtain the results. Results, which focus on translational absorber systems, are found to be consistent with previous results obtained for torsional vibration absorbers. It is found that strengths of the localized responses depend on the levels of imperfections, the relative imperfections among absorbers, and the absorbers' damping. Localization is shown to exist in the undamped multiple nearly-identical vibration absorbers system, or more generally, in the system where the ratio of the level of absorbers' damping to the level of imperfections in the absorbers is small. It is also shown that localized responses can be effectively avoided by introducing some intentional mistuning in the absorbers' stiffnesses. This mistuning should be small in absolute magnitude in order not to reduce the absorbers' performance and should be large when compared to the absorbers' imperfections.
Science Publishing Corporation
2013-06-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/889
10.14419/ijet.v2i3.889
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 157-164
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/889/738
oai:ojs.pkp.sfu.ca:article/892
2014-11-13T03:11:17Z
ijet:ART
Comparative analysis of the fluid dynamic efficiency of standard and alternative intake strategies for multivalve spark-ignition engines
Algieri, Angelo
The work aims at investigating the fluid dynamic performances of a multivalve spark-ignition engine and at evaluating the influence of the throttling process on the engine permeability. To this purpose, a production four-stroke internal combustion engine is analysed during the intake phase. The experimental characterisation is carried out at the steady flow rig in terms of dimensionless discharge and flow coefficients. The global investigation illustrates the noticeable effect of the valve lift on the engine head breathability. Furthermore, the experimental analysis demonstrates that the throttling process has a significant influence on the volumetric efficiency of the intake system and this effect increases with the valve lift. Finally, alternative strategies are studied in order to improve the engine fluid dynamic efficiency at partial loads. Specifically, the research shows that inlet valve deactivation and the adoption of asymmetric intake valve lifts assure an increase in head permeability.
Science Publishing Corporation
2013-05-20
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/892
10.14419/ijet.v2i2.892
International Journal of Engineering & Technology; Vol. 2 No. 2 (2013); 140-148
2227-524X
10.14419/ijet.v2i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/892/698
oai:ojs.pkp.sfu.ca:article/999
2014-11-13T03:11:21Z
ijet:ART
Measurement of R&D efficiency in NT and BT fields using DEA:a case in Korea
Park, Hanseok
Choi, Hoo-Gon
Since the Korean government has increased the R&D budget for both BT and NT areas, it needs to measure R&D efficiency and to manage the budget. The purpose of this study is to measure the efficiency of more than 2,000 BT and NT related projects supported by four basic research programs with the BCC-O model of the DEA method. Two input and five output variables are considered to determine the efficiency. The average efficiencies of both fields are low (0.3532 in the BT and 0.4677 in the NT) and the DEA projection results show that all output measures should be improved as much as 240% to 423% to be at efficiency 1. Also, correlation analysis is used to determine which variables strongly affect the efficiency in the BT and NT areas. This study could facilitate the development of better processes for project selection and many types of evaluation, provided the quantitative method such as the DEA could become widely acceptable for researchers.
Science Publishing Corporation
2013-06-18
info:eu-repo/semantics/article
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application/vnd.openxmlformats-officedocument.wordprocessingml.document
application/vnd.openxmlformats-officedocument.wordprocessingml.document
http://www.sciencepubco.com/index.php/ijet/article/view/999
10.14419/ijet.v2i3.999
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 165-174
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/999/756
http://www.sciencepubco.com/index.php/ijet/article/view/999/16980
http://www.sciencepubco.com/index.php/ijet/article/view/999/16981
oai:ojs.pkp.sfu.ca:article/1003
2014-11-13T03:11:23Z
ijet:ART
Dynamic analysis of composite columns in Inelastic state
Rezaie Hajidehi, Mohsen
Darvizeh, Abolfazl
Mohammad Ranjbar, Malek
The main objective of this study is analyzing Seismic behavior of composite columns in frame in inelastic state under dynamic load. Therefore, three type of composite column have been used in this paper. IPB Steel section embedded in concrete (type 1), Concrete-filled thin-walled steel sections (type 2), half concreted IPB sections (type 3) which are designed for 3 and 8 floor frame tenement in plastic way. Three earthquake accelerogram have been used for analyzing model seismic behavior and model analysis has been done in non-linear dynamic analysis with Seismostruct application. The results demonstrated that frame designed by composite columns type 1 and 3 in the flexural behavior, have similar construction behavior in the way that plasticity, softness and good function to dispose lateral forces are the same. Although Type 2 composite model have large sections, have poor performance in tolerating flexural moment. This event refers to poor role of concrete in tension. On the other hand, the amount of concrete is important in Withstand compressive forces and in constructions with high compressive forces, type 1 and 2 have better performance.
Science Publishing Corporation
2013-07-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1003
10.14419/ijet.v2i3.1003
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 209-215
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1003/773
oai:ojs.pkp.sfu.ca:article/1005
2014-11-13T03:11:24Z
ijet:ART
Classifications, Surface Characterization and Standardization of Nanobiomaterials
Ali, Salah H. R.
Almaatoq, Marwah M.
Mohamed, Abdalla S.A.
Biomaterials measurement and standardization are necessary for suitable use in medical industries. Nanobiomaterials used in living creature body, taking in account of their biocompatibility, nontoxic and non carcinogenic. These requirements are eliminate many engineering materials that are available. Thus, the nanobiomaterial should possess adequate physical and mechanical properties and surface characteristics to serve as augmentation or replacement of body tissues. This paper discusses classification of different biomaterials and their standards reference in micro- and nano-scale are used in medical engineering applications in details.
Science Publishing Corporation
2013-06-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1005
10.14419/ijet.v2i3.1005
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 187-199
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1005/765
oai:ojs.pkp.sfu.ca:article/1023
2014-11-13T03:11:26Z
ijet:ART
Velocity of detonation (VOD) measurement techniques - practical approach
Tete, Aruna Dhanraj
Deshmukh, A.Y.
Yerpude, R.R.
Velocity of Detonation (VOD) is an important measure characteristics parameter of explosive material. The performance of explosive invariably depends on the velocity of detonation. The power/ strength of explosive to cause fragmentation of the solid structure determine the efficiency of the Blast performed. It is an established fact that measuring velocity of detonation gives a good indication of the strength and hence the performance of the explosive. In this survey various VOD measurement techniques such as electric, nonelectric and fibre optic have been discussed. To aid the discussion some commercially available VOD meter comparison are also presented. After review of the existing units available commercially and study of their respective merits and demerits, feature of an ideal system is proposed.
Science Publishing Corporation
2013-08-27
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1023
10.14419/ijet.v2i3.1023
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 259-265
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1023/817
oai:ojs.pkp.sfu.ca:article/1030
2014-11-13T03:11:27Z
ijet:ART
A review on Artificial Bee Colony algorithm
Verma, Balwant Kumar
Kumar, Dharmender
In recent years large number of algorithms based on the swarm intelligence has been proposed by various researchers. The Artificial Bee Colony (ABC) algorithm is one of most popular stochastic, swarm based algorithm proposed by Karaboga in 2005 inspired from the foraging behavior of honey bees. In short span of time, ABC algorithm has gain wide popularity among researchers due to its simplicity, easy to implementation and fewer control parameters. Large numbers of problems have been solved using ABC algorithm such as travelling salesman problem, clustering, routing, scheduling etc. the aim of this paper is to provide up to date enlightenment in the field of ABC algorithm and its applications.
Science Publishing Corporation
2013-06-21
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1030
10.14419/ijet.v2i3.1030
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 175-186
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1030/759
oai:ojs.pkp.sfu.ca:article/1048
2014-11-13T03:11:29Z
ijet:ART
Dynamic Threshold-based Congestion Control in Wireless Multimedia Networks
Abigaba Mirembe, Cuthbert
Nyongarwizi Akol, Roselyn
Butime, Julius
The last few decades have seen a tremendous growth of wireless networks demands due to the need to meet different multimedia applications available over the network. The demand has resulted into greater competition for the scarce available network resources and has introduced congestion in such networks that adversely affect the quality of service requirements of the applications. Call admission control is a key element if provision of quality of service in wireless networks is to be guaranteed. In this paper, a call admission control policy for wireless communication networks based on the use of dynamic threshold-based channel allocation scheme is proposed. The scheme deals with two traffic classes; voice and data with two different but equal channel thresholds, one for each traffic type assumed. The effect of the control parameters on the quality of service parameters is illustrated and analyzed.
Science Publishing Corporation
2013-06-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1048
10.14419/ijet.v2i3.1048
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 200-208
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1048/770
oai:ojs.pkp.sfu.ca:article/1050
2014-11-13T03:11:30Z
ijet:ART
Analysis and design of different controllers for non-linear power systems
Chaudhary, Rekha
Singh, Arun Kumar
The objective of this paper is to design controller for non-linear power system using Direct Feedback Linearization technique to improve the transient stability and to achieve better voltage regulation. In case of fault in the power system, power angle and the terminal voltage are the parameters which are to be monitored. The simulation has been carried out taking different values of initial power angles and results were obtained for power angle and terminal voltage. To overcome the demerits of DFL-LQ optimal controller and DFL voltage regulator, co-ordinated controller is proposed. Simulation results show that transient stability of a power system under a large sudden fault has been improved by using co-ordinated controller.
Science Publishing Corporation
2013-07-25
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1050
10.14419/ijet.v2i3.1050
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 216-224
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1050/787
oai:ojs.pkp.sfu.ca:article/1055
2014-11-13T03:11:42Z
ijet:ART
Comparative study of conventional and enzymatic pretreatment (scouring & bleaching) of cotton knitted fabric
Bashar, Md. Mahbubul
Siddiquee, Md. Abu Bakar
Sarker, Priti
Tohfa, Tanzina Tasmina
Hossain, Amjad
Azad, Ibrahim
Aktherr, Nazma
The scouring and bleaching performance of conventional process (hydrogen peroxide, sodium hydroxide), was compared to that of enzymatic process using enzyme (arylesterase) which catalyst the discontinuous peroxide reaction. The whiteness and reflectance% indicating bleaching performance and absorbency and weight loss % was used as a measure of the scouring performance. Comparison of these performance and the effects are analyzed by using graphical representation. The weight loss% of enzymatic process was less than conventional process. In conventional process the reflectance % and absorbency increased and whiteness decreased with the increasing of concentration of caustic soda and the aforementioned properties were increased with the increasing of concentration of H2O2. In enzymatic process the reflectance % of cotton fabric increased and whiteness and absorbency fluctuated with the increasing of concentration of enzyme. Meanwhile reflectance %, absorbency and whiteness increased with the increasing of concentration of hydrogen peroxide. Enzymatic process was found eco-friendly process as it was occurred in neutral pH and the COD of this process was less than conventional process. It was found that the enzymatic process was superior to the conventional process under the conditions studied. Keywords: Scouring, bleaching, conventional, enzymatic pretreatment.
Science Publishing Corporation
2014-01-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1055
10.14419/ijet.v3i1.1055
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 37-43
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1055/983
oai:ojs.pkp.sfu.ca:article/1080
2014-11-13T03:11:32Z
ijet:ART
A stepwise multi-assignment spreadsheet model to select student teams
Celik, Bilge Gokhan
Brunnhoeffer, Gilbert C. F.
Student projects play a big role in engineering and management education. Most projects require students to work in teams, which allow students to practice their technical knowledge, foster the development of personal leadership skills, and teach the value of team accomplishments. One of the challenges of administering team projects is to create the best team compositions that give all teams the equal chance of success while maximizing interaction between students. The instructor should strive to balance each team so the team capabilities are as even as possible. Instructors also should take into account the performance of each student throughout the semester, when recreating teams for upcoming assignments. This paper presents a stepwise optimization that continues throughout the semester as the teams evolve from one assignment to another. Results show that this method can expose students to approximately 50% of their classmates within four team assignments and reasonable team grade variance.
Science Publishing Corporation
2013-08-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1080
10.14419/ijet.v2i3.1080
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 247-258
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1080/815
oai:ojs.pkp.sfu.ca:article/1081
2014-11-13T03:11:34Z
ijet:ART
Development of MATLAB-Based Digital Signal Processing Teaching Module with Graphical User Interface Environment for Nigerian University
Ade', Oyetunji Samson
Ale, Daniel
The development of a teaching aid module for digital Signal processing (DSP) in Nigeria Universities was undertaken to address the problem associated with non-availability instructional module. This paper annexes the potential of Peripheral Interface Controllers (PICs) with MATLAB resources to develop a PIC-based system with graphic user interface environment suitable for data acquisition and signal processing. The module accepts data from three different sources: real time acquisition, pre-recorded data acquisition and software-generated data. The developed system is able to perform analysis on both stationary and non-stationary signals using Fast Fourier Transform (FFT) and Short Time Fourier Transform (STFT). The STFT-based approach provides Improved Joint Time Frequency Analysis (IJTFA) of signals. A graphical user interface (GUI) was developed to create interactive environment for understanding the operations of digital signal processing. The developed system not only provides interactive platform for data acquisition, spectral analysis and filter design but also makes it avoidable to students in Nigeria University.
Science Publishing Corporation
2013-08-17
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1081
10.14419/ijet.v2i3.1081
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 230-238
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1081/807
oai:ojs.pkp.sfu.ca:article/1082
2014-11-13T03:11:35Z
ijet:ART
Definition of manufacturability - product of mathematical expressions and fuzzy logic for his early design
Antic, Radivoje Borivoje
Cvetkovic, Slavica
Pejovic, Branko
Cvetkovic, Milan
The paper explaines manufacturability of products for robust design of a new product. Explained mathematical expressions of fuzzy logics describe manufacturability. Provides an example of using the model for the determination of the tmanufacturability.
Science Publishing Corporation
2013-08-25
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1082
10.14419/ijet.v2i3.1082
International Journal of Engineering & Technology; Vol. 2 No. 3 (2013); 239-246
2227-524X
10.14419/ijet.v2i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1082/813
oai:ojs.pkp.sfu.ca:article/1101
2014-11-13T03:11:37Z
ijet:ART
An Enhanced Mobile Phone Dialler Application for Blind and Visually Impaired People
Yousef, Rana Mohammad
Adwan, Omar
Abu-Leil, Murad
This paper presents the development of a new mobile phone dialler application which is designed to help blind and visually impaired people make phone calls. The new mobile phone dialler application is developed as a windows phone application to facilitate entering information to touch screen mobile phones by blind people. This application is advantageous through its innovative concept, its simplicity and its availability at an affordable cost. Feedback from users showed that this new application is easy to use and solves many problems of voice recognition applications such as inaccuracy, slowness and interpretation of unusual voices. In addition, this application has increased the users’ ability to dial phone numbers more independently and less stressfully.
Science Publishing Corporation
2013-11-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1101
10.14419/ijet.v2i4.1101
International Journal of Engineering & Technology; Vol. 2 No. 4 (2013); 270-280
2227-524X
10.14419/ijet.v2i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1101/918
oai:ojs.pkp.sfu.ca:article/1103
2014-11-13T03:12:40Z
ijet:ART
Experimental investigation of enhanced remediation of contaminated soil using ultrasound effect
Adeyinka, Adegbola
Dare, A.A.
Popoola, D.S.
Saka, H.A.
Afolabi, A.O.
In the development of an effective ground remediation method, there has been significant research focusing on the technique of enhancing soil-flushing method The soil flushing method enhanced by ultrasonic waves is a new technique that is potentially an effective method for in situ remediation of the ground contaminated by NAPL hydrocarbons. The research work investigated the effectiveness of sonication in the soil flushing method for a range of conditions involving treatment time, hydraulic gradient and the discharge velocity. The experimental investigation of the study was conducted using the inbuilt ultrasonic generator (NEE 555 timer stable multi-vibrator) and soil flushing apparatus to remove the contaminant from the soils. The test result indicated that the rate of the contaminant extraction increased considerably with increasing sonication time up to 120seconds with 34% contaminant removed without sonication and 64.05% contaminant removed with sonication and started decreasing at the level where cavitation occurred. Increasing the sonication time also increase the contaminant removal up to the level where cavitation occurs. The effectiveness of sonication decreases with hydraulic gradient but eventually becomes constant under higher flow rates and also is highly related with the discharge velocity. Results obtained showed that sonication can enhance pollutant removal. Keywords: Soil-Flushing Method, NAPL Hydrocarbons, Sonication, Soil Remediation, Cavitation.
Science Publishing Corporation
2014-06-24
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1103
10.14419/ijet.v3i3.1103
International Journal of Engineering & Technology; Vol. 3 No. 3 (2014); 322-326
2227-524X
10.14419/ijet.v3i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1103/1215
oai:ojs.pkp.sfu.ca:article/1111
2014-11-13T03:11:44Z
ijet:ART
A proposed routing scheme for power reduction in wireless networks
Elewely, Dalia
Areed, Marwa
Ali, Hesham
Ad-hoc networks consist of a set of mobile nodes with a restricted power supply resources that can communicate with each other without any established infrastructure or centralized administration. The loss of some nodes may cause significant topological changes, undermine the network operation, and affect the lifetime of the network. This paper discusses the energy consumption problem and summaries the existing power saving techniques in ad-hoc wireless networks. The main objective of this paper is to introduce a new power aware multi-path node disjoint routing scheme based on the Dynamic Source Routing protocol (DSR), which can prolong MANET’s lifetime, reduce routing delay and increase the reliability of the packets reaching its destination. Therefore, a comprehensive study of DSR protocol has been drawn using NS-2 simulator, to evaluate the performance of DSR as a routing strategy and investigate its efficiency in saving wireless networks resources, as a prelude to avoid its performance shortcomings in our proposed routing scheme. Keywords: Power aware protocol, node disjoint, network simulation 2, multipath routing, Dsr protocol, ad-hoc network.
Science Publishing Corporation
2013-12-29
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1111
10.14419/ijet.v3i1.1111
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 20-29
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1111/966
oai:ojs.pkp.sfu.ca:article/1173
2014-11-13T03:11:38Z
ijet:ART
Designing a Microstrip coupled line bandpass filter
Ragani, Taoufik
Touhami, N. Amar
Agoutane, M.
Bandpass filters play a significant role in wireless communication systems. Transmitted and received signals have to be filtered at a certain center frequency with a specific bandwidth, in this paper, a coupled-line bandpass Filter at the center frequency 6 GHz with the wide bandwidth of 2 GHz. this type of filter can be used in WLAN and other applications for the frequency range of 5-7 GHz.
Science Publishing Corporation
2013-09-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1173
10.14419/ijet.v2i4.1173
International Journal of Engineering & Technology; Vol. 2 No. 4 (2013); 266-269
2227-524X
10.14419/ijet.v2i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1173/829
oai:ojs.pkp.sfu.ca:article/1391
2014-11-13T03:12:41Z
ijet:ART
Investigation of jatropha seed oil as austempering quenchant for ductile cast iron
Terngu, Akor
Terfa, Gundu David
Austempering is a multi-step process that includes austenitizing, followed by cooling rapidly enough to avoid the formation of pearlite to a temperature above the martensite start (Ms) and then holding until the desired microstructure is formed. It is an isothermal heat treatment process that, when applied to cast iron, produces components that, in many cases, have properties superior to those process by conventional heat treatment. Salt bath has been recognized as the conventional quenching medium for austempering. This study investigates the suitability of jatropha seed oil as quenching medium for asaustempering ductile cast iron. Test samples were austenitized at 9500C; socked for 1hr; austempered for varying periods of 1, 2, 3, 4 and 5hrs. The result showed significant increase in tensile strength and impact energy apart from achieving an appreciable increase in hardness. It also tally with recommended values of ductile cast iron austempered in salt bath, implying that jatropha oil can be used as hot bath for the austempering of ductile cast iron. Keywords: Ausferrite, Austempering, Austenitized, Matrix So, Cked.
Science Publishing Corporation
2014-08-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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http://www.sciencepubco.com/index.php/ijet/article/view/1391
10.14419/ijet.v3i3.1391
International Journal of Engineering & Technology; Vol. 3 No. 3 (2014); 387-390
2227-524X
10.14419/ijet.v3i3
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1391/1320
oai:ojs.pkp.sfu.ca:article/1421
2014-11-13T03:11:40Z
ijet:ART
Sound absorption of a micro-perforated plate backed by a porous material under high sound excitation: measurement and prediction
Tayong, Rostand Boumda
Dupont, Thomas
Leclaire, Philippe
The sound absorption coefficient of perforated facings backed by porous materials is studied under high sound intensities in the absence of mean flow. The theoretical considerations are based on the equivalent fluid following the Johnson-Champoux-Allard approach and the use of the transfer matrix method. To take into account the high sound levels effects, the air flow resistivity of each layer is modified following the Forchheimer law. Two specimens of perforated plate are built and tested when backed by a polymeric foam and a fibrous material. A specific impedance tube setup is developed for the measurement of the surface acoustic impedance for sound pressure levels ranging from 90 dB to 150 dB at the surface of the perforated facing. To corroborate the validity of the presented method, two considerations are particularly depicted in the experimental results: first, the case where the perforated facing and the porous material are both directly backed by a rigid wall and the case where there is an air cavity between the porous material and the rigid wall. Good agreement is observed between the simulation and the experimental results.
Science Publishing Corporation
2013-11-23
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1421
10.14419/ijet.v2i4.1421
International Journal of Engineering & Technology; Vol. 2 No. 4 (2013); 281-292
2227-524X
10.14419/ijet.v2i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1421/929
oai:ojs.pkp.sfu.ca:article/1430
2014-11-13T03:11:41Z
ijet:ART
Conception and Implementation of a BCH Code on a FPGA Board
EL GOURI, Rachid
Ait Ahmed, Wassima
Lichioui, Ahmed
Hlou, Laamari
In this paper we have designed and implemented a BCH (15, 7, 5) encoder on FPGA using VHDL description language and we implanted it on an FPGA Spartan 3E Starter board. The digital logic implementation of binary encoding of multiple error correcting BCH code of length n=15 is organized into shift register circuits. Multiple characteristics of cyclic codes will be discussed further on. The results of the simulation and implementation using Xilinx ISE.12.1 software and the LCD screen on the FPGA’s Board will be shown at last.
Science Publishing Corporation
2013-11-28
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1430
10.14419/ijet.v2i4.1430
International Journal of Engineering & Technology; Vol. 2 No. 4 (2013); 293-301
2227-524X
10.14419/ijet.v2i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1430/936
oai:ojs.pkp.sfu.ca:article/1439
2014-11-13T03:11:45Z
ijet:ART
Numerical Simulation and Optimization of Sleipner Carbon Sequestration Project
Zhang, Zheming
Agarwal, Ramesh K.
The capability of accurate numerical simulation and optimization is greatly desired as the technology of geological carbon sequestration (GCS) advances. It can provide quick information for preliminary design of a GCS project. The simulation and optimization results can provide better understanding of the nature of GCS and the uncertainties associated with it and therefore can provide guidelines and the development of best practices for its deployment. In this paper, first the satisfactory history-matching of the Sleipner GCS project is achieved by using the TOUGH2 simulation package. Next, the reservoir engineering technique known as water-alternating-gas (WAG) is applied to the model of the Utsira formation and optimization studies are conducted to determine the optimal WAG operation using the recently developed simulation/optimization code GA-TOUGH2. Results of WAG optimization suggest that in situ CO2 footprint reduction and dissolution acceleration can be achieved while minimizing the water usage.
Science Publishing Corporation
2013-12-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1439
10.14419/ijet.v3i1.1439
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 1-13
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1439/942
oai:ojs.pkp.sfu.ca:article/1474
2014-11-13T03:11:47Z
ijet:ART
Free vibration analysis of isotopic rectangular plate with one edge free of support (CSCF and SCFC plate)
Ebirim, Stanley I
Ezeh, J C
Ibearugbulem, M Owus
The paper presents a theoretical formulation based on Ibearugbulem’s shape function and application of Ritz method. In this study, the free vibration of simply supported plate with one free edge was analyzed. The Ibearugbulem’s shape function derived was substituted into the potential energy functional, which was minimized to obtain the fundamental natural frequency. Aspect ratios from 0.1 to 2.0 with 0.1 increments were considered. The values of fundamental natural frequencies of the first mode were determined for different aspect ratio. For aspect ratio of 1.0, the value of non-dimensional parameter of fundamental natural frequency obtained was 23.86. Comparison was made for values of non-dimensional parameter of fundamental natural frequencies obtained in this study with those of previous research works. It was seen that there is no significant difference between values obtained in this study with those of previous studies. Keywords: fundamental natural frequency; Ibearugbulem’s shape function; CSCF plate; Ritz method; SCFC plate.
Science Publishing Corporation
2014-01-12
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1474
10.14419/ijet.v3i1.1474
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 30-36
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1474/979
oai:ojs.pkp.sfu.ca:article/1478
2014-11-13T03:11:48Z
ijet:ART
Study of mosquito attractants for photo catalytic mosquito trap
Tristantini, Dewi
-, Slamet
Stephanie, Angela Jessica
Photo catalytic mosquito trap is made of TiO2-Activated Carbon (AC) with a certain composition of AC. Research concerns on the heat spectrum which is produced by combination process of existing CO2 and humid air. The purpose of performance testing is to observe capability of this device in trapping mosquitoes related to the air temperature profile for heat spectrum is play important role for attracting mosquitoes. Result shows photo catalytic mosquito trap is more effective than devices which only consist of UV light or stream of CO2 and the humid air. A number of mosquitoes trapped by the photo catalyst coated panel configuration and UV lamps were lit proved far more effective because the heat production from recombination process. A little difference in temperature can be detected by mosquito. Keywords: Photo Catalytic, Mosquito, Recombination.
Science Publishing Corporation
2013-12-19
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1478
10.14419/ijet.v3i1.1478
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 14-19
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1478/954
oai:ojs.pkp.sfu.ca:article/1569
2015-01-07T05:10:27Z
ijet:ART
The structural overview of root and branch concept in transportation management planning
Ndikom, Obed
This paper looks at the nature, structure, characteristics, scope and dimensional trends and operational functioning of root and branch concept of transportation management planning in any organization. The root and branch concept of transportation management planning is a process that connotes a managerial initiative of adopting a holistic bottom-up and top-down approach in managerial planning process. This concept is one that decides a systematic adoption of either bottom-up strategy or top-down approach in the management planning of a transport organization. This concept has a global view and honestly sees it as one that can’t be possible without the management of the internal operational mechanisms and dynamics at the end. Therefore, effort should be made to have a holistic structural overview of this emerging concept in dealing and managing internal issues in the organization. Keywords: Structural Overview, Root and Branch Concept, Transportation Management Planning, Bottom-Up and Top-Down Approach.
Science Publishing Corporation
2014-10-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1569
10.14419/ijet.v3i4.1569
International Journal of Engineering & Technology; Vol. 3 No. 4 (2014); 492-500
2227-524X
10.14419/ijet.v3i4
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1569/1414
oai:ojs.pkp.sfu.ca:article/1597
2014-11-13T03:11:50Z
ijet:ART
Environmental assessment of the Tung cultivation through life cycle analysis
Bernál, Marcelo
Schneider, Rosana
Machado, Ênio
Over the past few decades, conventional agriculture has been facing serious crises caused by numerous factors, including poor soil management and the excessive application of pesticides. Thus, alternative production systems have been developed, including agroforestry systems, especially those that produce both energy and food. The objective of this study was to environmentally evaluate the culture of Aleurites fordii Hemls. (Tung) using the Life Cycle Assessment method with the SimaPro 7.3.2 software. The results revealed that in family farms that use less mechanization to harvest crops, the primary category of environmental impact was land use, which included the removal of animal and vegetable species and ecosystem changes. The full impact of this category was 1741.21 m2yr PDF (potentially disappeared fraction). Subsequently, prognostics were established for the reduction of such impacts, and we conclude that Tung has a high potential for agricultural installation with high responsibility to the environment. Keywords: Environmental factors, Aleurites fordii Hemls, Life Cycle Management, Tung.
Science Publishing Corporation
2014-02-17
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1597
10.14419/ijet.v3i1.1597
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 70-74
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1597/1071
http://www.sciencepubco.com/index.php/ijet/article/view/1597/17035
oai:ojs.pkp.sfu.ca:article/1598
2014-11-13T03:11:51Z
ijet:ART
Z notation: A roadmap, “This paper has been withdrawn”
Singh, Monika
Sharma, A .K.
This paper has been withdrawn.
Science Publishing Corporation
2014-02-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://www.sciencepubco.com/index.php/ijet/article/view/1598
10.14419/ijet.v3i1.1598
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 63-69
2227-524X
10.14419/ijet.v3i1
oai:ojs.pkp.sfu.ca:article/1635
2014-11-13T03:11:53Z
ijet:ART
New product concept selection: an integrated approach using data envelopment analysis (DEA) and conjoint analysis (CA)
Salhieh, SaEd M.
Al-Harris, Mira Y.
New product concept development is considered to be a critical step and the main determinant for the success or failure of new product development. This paper introduces a new methodology for the evaluation and selection of new product concepts using Data Envelopment Analysis (DEA) and Conjoint Analysis (CA). The proposed methodology integrates customer perceived value of the new product concepts through the use of CA and uses this perceived value as a measure for the new concepts’ performance. In addition, the methodology takes into account the development burden that a company has to perform to bring the new concept into a state of market readiness. This development burden is estimated by determining two main factors, namely the burden to produce and the burden to sell the new product concept. The customer perceived value and the development burden are both used in DEA to evaluate the new product concepts resulting in the selection of the best product concept. The applicability of the proposed methodology is illustrated through a case study. Keywords: Product development, concept selection, data envelopment analysis, conjoint analysis.
Science Publishing Corporation
2014-02-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1635
10.14419/ijet.v3i1.1635
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 44-55
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1635/995
oai:ojs.pkp.sfu.ca:article/1691
2014-11-13T03:11:57Z
ijet:ART
Design and simulation of bio fluidic sensor based on photonic crystal
Gaddam Kesava Reddy, Rajini
Ashok kumar, Sharmila
Varadhan, Sankardoss
Photonic crystals are materials patterned with a periodicity in dielectric constant in one, two and three dimensions and associated with Bragg scattering which can create range of forbidden frequencies called Photonic Band Gap (PBG). By optimizing various parameters and creating defects, we will review the design and characterization of waveguides, optical cavities and multi-fluidic channel devices. We have used such waveguides and laser nanocavities as Biosensor, in which field intensity is strongly dependent on the type of biofliud and its refractive index. This design and simulation technique leads to development of a nanophotonic sensor for detection of biofluids. In this paper, we have simulated sensing of biofliud in various photonic defect structures with the help of a numerical algorithm called Finite Difference Time Domain (FDTD) method. The simulation result shows the high sensitivity for the change in the bio-molecular structure. For developing the complete sensor system, we have to use the MEMS technologies to integrate on-chip fluidic transport components with sensing systems. The resulting biofluidic system will have the capability to continuously monitor the concentration of a large number of relevant biological molecules continuously from ambulatory patients. Keywords: FDTD, Photonic Crystals, Bio fluid Sensor, Optical Cavity.
Science Publishing Corporation
2014-03-25
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1691
10.14419/ijet.v3i2.1691
International Journal of Engineering & Technology; Vol. 3 No. 2 (2014); 106-112
2227-524X
10.14419/ijet.v3i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1691/1079
oai:ojs.pkp.sfu.ca:article/1706
2014-11-13T03:11:54Z
ijet:ART
Issues in the sustainability of products designed for multi-lifecycle
Dunmade, Israel
Design for multi-lifecycle (DFML) is a sustainable design approach that seeks to maximize the utility of resources used in developing a product by incorporating features that enable the elongation of the techno-economic service life of that product at the design stage. The goal of DFML is “indefinite” use of the resources invested/embodied in a product without compromising its economic value, technological soundness and socio-cultural acceptability. However, there is a limit to how many times a product designed for multi-lifecycle can be cycled. The aim of this research is to identify issues affecting how many times products designed for multi-lifecycle could be cycled. Another goal of this study is to articulate how the understanding of these issues can be utilized in improving product design for multi-lifecycle. This study is based on intensive literature survey and on over twenty years’ experience in conventional- and in sustainable design and development of agri-food machinery. From the study we learned that the sustainability of products and equipment designed for multi-lifecycle depends, among other things, on the durability of the core components, the required performance standard, resource consumption tipping point, economic advantage eradication point, changes in consumer taste, and regulatory changes. It means that the number of times that resources invested in a product designed for multi-lifecycles can be cycled is increasable by improving the durability of the structure and core components of the product. It also means that designers would be able to improve the sustainability of machinery designed for multi-lifecycles by incorporating features that facilitate easy reconfiguration and upgrading of the product at reasonable cost as consumer taste and regulations changes. Keywords: Design for multi-lifecycle, design for environment, sustainable design, sustainability, Eco design.
Science Publishing Corporation
2014-02-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1706
10.14419/ijet.v3i1.1706
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 56-62
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1706/1004
oai:ojs.pkp.sfu.ca:article/1733
2014-11-13T03:11:56Z
ijet:ART
Low-cost piezoelectric footswitch system for measuring temporal parameters during walking
Balbinot, Gustavo
Schuch, Clarissa Pedrini
Zaro, Milton Antonio
Vaz, Marco Aurélio
Human walking is one of the most investigated biomechanical events, and gait analysis depends on accurate measurement of heel strike (HS) and toe off (TO). The purpose of this study was to construct and validate a low-cost footswitch system for the measurement of temporal gait parameters. Ten young healthy subjects participated of the validation and test of the footswitch system with two different footwear, Bland-Altman analysis showed 98% and 95% of validation data within the limits of agreement, for HS and TO respectively (mean difference of 16ms±1ms and 20ms±9ms) and the temporal parameters measured during treadmill walking at a speed of 4.5km.h-1 showed results similar to those found in the literature for normal walking. The outcomes confirm low CoVs for the instrumented athletic and instability shoe, respectively: (1.52±0.61)% and (1.90±0.73)% for contact time, (2.17±0.95)% and (2.57±0.95)% for balance time, (0.84±0.28)% and (1.12±0.53)% for stride time. The low-cost footswitch system described and validated in the present study has an important practical applicability, mostly for emerging and developing countries biomechanics labs. Keywords: Footswitch System, Gait Analysis, Locomotion, Low-Cost, Walk.
Science Publishing Corporation
2014-02-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
application/vnd.openxmlformats-officedocument.wordprocessingml.document
http://www.sciencepubco.com/index.php/ijet/article/view/1733
10.14419/ijet.v3i1.1733
International Journal of Engineering & Technology; Vol. 3 No. 1 (2014); 75-81
2227-524X
10.14419/ijet.v3i1
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1733/1022
http://www.sciencepubco.com/index.php/ijet/article/view/1733/17047
oai:ojs.pkp.sfu.ca:article/1803
2014-11-13T03:11:59Z
ijet:ART
Frequency analysis of annual one day to five consecutive days maximum rainfall for Gandak river basin
Singla, Shivika
Halder, Raktim
Khosa, Rakesh
Singla, Rumani
Rajeev, Rudraksh
The present study has been conducted for rainfall intensity and frequency estimation for the Gandak basin, a region prone to high floods with an unrealized and unexplored hydro-potential. The two popular gridded precipitation datasets i.e.: (1) APHRODITE, and (2) IMD, for the years 1969-2005, has been used to calculate the mean basin precipitation through the Thiessen polygon method on the ARC-GIS interface. This computed data was used to find out the 1-day, 2-day to 5-day consecutive maximum precipitation series and hence fitted into various well-known probability distribution functions viz., Normal, Gamma, Exponential, etc. According to the best fit data in these functions, the quantiles were determined corresponding to a return period of 2, 10, 20, 25, 50 and 100 years. The two widely used tests: Chi-square Test and Kolmogorov-Smirnov Test were employed to further check the goodness of fit of the series in the distributions. The results reveal that the best fit for 1-day was achieved with the normal distribution, for 2-day with GEV and with GPAR for the remaining maximum consecutive days rainfall. Such studies have thus proven to be substantially facilitative in planning for the safe and economic design of various engineered structures such as bridges, culverts, levees, canals, irrigation and drainage works and effective reservoir management. Keywords: Floods, Frequency, Hydrology, Probability Distribution, Rainfall.
Science Publishing Corporation
2014-03-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://www.sciencepubco.com/index.php/ijet/article/view/1803
10.14419/ijet.v3i2.1803
International Journal of Engineering & Technology; Vol. 3 No. 2 (2014); 93-98
2227-524X
10.14419/ijet.v3i2
eng
http://www.sciencepubco.com/index.php/ijet/article/view/1803/1063
1cbb1cab61817b6e24da5148f9576d6a