Journal of Computer & Information Technology

Papers

Voulume: 2
Issue: 3
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Article No. 1
Comparative Analysis of Approximation Algorithms for Queueing Networks
Vikas Shinde*, Mukta Kalra** and Kamal Wadhwa

*Department of Applied Mathematics, Madhav Institute of Technology & Science, Gwalior MP India

**Department of  Mathematics, Govt Narmada P.G. College Hoshangabad Mp India

Abstract :

In present paper, we analyze four approximation algorithms for prooducts from queueing networks i.e Self Correcting Approximation Technique (SCAT), Summation method (SUM) and BOTTAPPROX. We have carried out various performance indices viz. response time,throughput, utilization and mean number of jobs for single server nodes, and also compare these results with Exact Mean Value Analysis technique. For illustration purpose, tables and graphs are also provided.

Keyword : queueing networks
DOI : jucit
Download Count : 309
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Article No. 2
Link Layer Protocol Adoptions in a Graph based Common Case and Strong Interference models of wireless Mesh Networks
*K.Rama Krishnaiah and #K.Rajasekhara Rao

*Department of Computer Science and Engineering K.L University Vaddeswaram India

#Research Scholar (PT,) Department of Computer Science and Engineering Rayalaseema University Kurnool India

Abstract :

This paper mainly aims at studying how importnat the results of a graph based common case and strong interference models of Wireless Mesh Networks in a link layerprotocol. To Unitize the wireless channel full extent, it is studied how random access has to be developed as it bears several advantages in wireless network to support neighbouring senders and receivers. It is found that, CTS and payload frame transmissions need to be synchronized between neighbouring stations and RTS frames must not be synchronized. A basic link layer protocol is also introduced in this paper to realize Wireless Mesh Networks that are able to operate without losing bandwidth and is enhanced to better support load adoption, traffic, dynamic routing and multiple Hotspots. It is observed that, the enhanced protocol is quite complex and requires further fine tuning to find a suitable tradeoff between fast reaction on unsynchronized packet transmission and poll transmission to the Hotspot.

Keyword : Wireless Mesh Networks
DOI : jucit
Download Count : 307
View Count : 298
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Article No. 3
Comparison of modelling capabilities of CAID and MCAD software for freeform geometries: A case study of a mobile handset
Atif Aziz

School of Mechanical Engineering, University of Leeds , Leeds, United Kingdom

Email:-atifaziz82@gmail.com

Abstract :

The paper compares and contrast capabilities of the two software Alias Computer Aided Industrial Design software (CAID) and I-DEAS Mechanical Computer Aided Design Software (MCAD) on the modelling of artefacts which have got freeform geometry. Freeform geometry is the geometry which uses surves and surfaces, which is not made up of Constructive Solid Geometry (CSG) such as cubes, spheres, and cylinder. The purpose of this case study is to find out the capabilities of two sofware to model the freeform objects. To compare the two software, a mobile handset having a typical and challenging freeform geometry has been used. The modelling of the mobile handset and various parameters that wre taken into consideration are discussed. The problems which were faced while modelling are discussed followed by its solutions.

Keyword : CAID, MCAD, CSG
DOI : jucit
Download Count : 294
View Count : 299
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Article No. 4
Technological Issues and Challenges Facing e-Commerce and Virtual Enterprises and its Remedies
M.A.Rizvi1 and Shailendra Singh2

1,2Department of Computer Engineering and Applications NITTR, Bhopal India

Email:- marizvi@hotmail.com

Abstract :

In present scenario e-commerce is playing very essential role in the online business. Although it is one of the best & cheapest intermediate for reaching out to new customers in the online market, if e-commerce implemented effectively, it also offers a smart way of doing online business & expanding it more.

An online business e-commerce podium is planned & implemented to make the most of its reach to potential customers and provide them with a convenient, satisfying & protected shopping experience.

e-commerce is a phenomenon that is arousing avid interest in industrialized countries and more recently, in the developing world. Is this a passing fancy or just another distribution channel which companies are free to get involved in or not? Or, on contrary, is it a must if one is to stay in business and prosper? This paper looks at some of the technological issues and challenges and remedies related to e-commerce and emergence of virtual enterprises.

Keyword : components, e-commerce, security, privacy, authentication, internet
DOI : jucit
Download Count : 447
View Count : 309
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