Heuristic Method for Effective Cellular Network Planning Design

Author	Yee Ming Chen, Fang Yun Yeh
On Pages	75-78
Volume No.	1
Issue No.	2
Issue Date	May 01, 2011
Publishing Date	May 01, 2011
Keywords	Channel assignment, cellular network, algorithm, mobile communication

Abstract

Channel allocation has been considered a NP complete problem, and involves a very important issue for the adequate dimensioning of wireless communication networks. In this paper, we apply the formulation of Minimum span problem (MS-CAP) with heuristic method to three benchmarking problems, for some of which interference-free solutions cannot be found but the approach is able to minimize the interference effectively.

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http://scientific-journals.org/Download_May_pdf_5.php

Securing Watermarked-Relational Data by Using Encryption and Decryption

Author	Nagarjuna.Settipalli, R Manjula
On Pages	70-74
Volume No.	1
Issue No.	2
Issue Date	May 01, 2011
Publishing Date	May 01, 2011
Keywords	Ownership rights, relational data, watermarking, security, encryption, decryption, client, server.

Abstract

Ownership rights on outsourced relational database are very crucial issue in today’s internet environment and in many content distribution applications, because the rapid growth of the internet and related technologies offered an unprecedented ability to access and redistribute digital content. In earlier existing systems the relational data will be watermarked and directly send to the client system, in these systems while sending relational data from server to client attacker easily copy the data and create same copy of relational data. Here there is no security to watermarked relational data. In our proposed system before sending the watermarked relational data to client side we encrypt the relational data and send it to the client side, at client side decryption will be done to get the original watermarked data. Because of using this encryption technique even an attacker copy the data he/she may not read the watermarked relational data.

 

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http://scientific-journals.org/Download_May_pdf_4.php

A Formal Model for Data Flow Diagram Rules

Author	Rosziati Ibrahim, Siow Yen Yen
On Pages	60-69
Volume No.	1
Issue No.	2
Issue Date	May 01, 2011
Publishing Date	May 01, 2011
Keywords	Context diagram, data flow diagram, formal method, consistency rules

Abstract

A formal model for data flow diagram (DFD) rules is developed by introducing a syntax and semantics for its rules. DFD has been chosen because it is an approach for specifying, constructing and visualizing the model of a system graphically and has been in practical use on a very wide basis but still lacks formal and precise understanding. This formal model can be used to check the correctness of the diagrams and consistency among the diagrams.

 

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http://scientific-journals.org/Download_May_pdf_3.php