Volume 4, Issue 2 (2008) | Journal of Computer Science

Ant Colony Based Node Disjoint Hybrid Multi-path Routing for Mobile Ad Hoc Network

B. Kalaavathi — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.80.86

Mobile Ad hoc Networks are characterized by multi-hop wireless links, without any infrastructure and frequent node mobility. A class of ant colony based routing protocols has recently gained attention...

FPGA Implementation of Power Aware FIR Filter Using Reduced Transition Pipelined Variable Precision Gating

A. Senthilkumar — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.87.94

With the emergence of portable computing and communication system, power awareness is one of the major objectives of VLSI Design. This is its ability to scale power consumption based on the time-varyi...

A Middleware Service for Increasing Applications Integration Availability

Nader Mohamed — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.95.102

Middleware has become an integral part of many distributed applications offering effective integration and interoperability solutions. In some situations a problem may occur where the integration of d...

Access Weight Replica Consistency Protocol For Large Scale Data Grid

Mohammed Radi — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.103.110

Replication is a well known technique to improve reliability and performance for a Data Grid. Keeping consistent content at all distributed replica is an important subject in Data Grid. Replica consis...

Improved Offline Signature Verification Scheme Using Feature Point Extraction Method

Debasish Jena — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.111.116

Signature verification is a technology that can solve security problems in our networked society. A new improved offline signature verification scheme is proposed which is based on selecting 60 featur...

A Block Cipher using Feistal's Approach Involving Permutation and Mixing of the Plaintext and the Additive Inverse of Key Matrix

Aruna Varanasi — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.117.124

In this research, we have developed a block cipher for a block of size 112 bits by using an iterative method involving a permutation of the plaintext and the subkeys generated in each iteration. Here ...

Testing Image Encryption by Output Feedback (OFB)

Yas A. Alsultanny — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.125.128

When it is necessary to securely transmit data in open networks, the encryption must be performed. Most of the cryptographic algorithms were mainly developed for text data. Unfortunately, algorithms t...

Fast Algorithms for Outlier Detection

Fawaz A.M. Masoud — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.129.132

Finding fast algorithms to detect outliers (as unusual objects) by their distance to neighboring objects is a big desire. Two algorithms were proposed to detect outliers quickly. The first was based o...

Classification of Textures by Avoiding Complex Patterns

V. V. Kumar — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.133.138

The present research advocates a new method for texture classification based on primitive patterns. For this, an optimal set of eight simple patterns are selected based on their discrimination. The pe...

Memory Convergence and Optimization with Fuzzy PSO and ACS

Subhash C. Pandey — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.139.147

Associative neural memories are models of biological phenomena that allow for the storage of pattern associations and the retrieval of the desired output pattern upon presentation of a possibly noisy ...

Heterogeneous GPRS-WLAN Integration Based on Ad-Hoc Networks

S. Louvros — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.148.150

In heterogeneous microcellular networks like 802.11(WLAN)-GPRS, users can roam around through vertical handoffs. The major problem in heterogeneous networks is that they support different QoS requirem...

Improving Response Time of Authorization Process of Credit Card System Using Multi-Threading and Shared-Memory Pool Techniques

Siti H.A. Hamid — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.151.160

Current credit card authorization was developed on single-threaded model whereby authentication process takes longer time to respond due to sequential process of card's risk management profile and its...

A Novel Distributed Clustering Algorithm for Mobile Ad-hoc Networks

Sahar Adabi — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.161.166

This paper proposed a new Distributed Score Based Clustering Algorithm (DSBCA) for Mobile Ad-hoc Networks (MANETs).In MANETs, select suitable nodes in clusters as cluster heads are so important. The p...

Improving Quality of Clustering using Cellular Automata for Information retrieval

P. K. Sree — 2008-02-28

Journal of Computer Science, Published online: 28 February 2008; doi:10.3844/jcssp.2008.167.171

Clustering has been widely applied to Information Retrieval (IR) on the grounds of its potential improved effectiveness over inverted file search. Clustering is a mostly unsupervised procedure and the...