Volume 4, Issue 10 (2007) | American Journal of Applied Sciences

MAI Cancellation in DS/CDMA using a new Approach on WDS

Y. Jabrane — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.736.740

The steeping chip weighting waveforms are used in Multiple Access Interference cancellation by emphasizing the received spreading signal, therefore, that allows to solve the problem of orthogonality f...

A Novel Packet Marketing Method in DDoS Attack Detection

Changhyun Beak — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.741.745

Functionality and availability are one of the main characteristics of internet and hence very inviting for attackers to try to provoke a denial-of-service attack. As the intensity and frequency of DDo...

Utility of Certain Π Acceptors for Spectrophotometric Determination of Sildenafil Citrate

Nora H. Al-Shaalan — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.746.750

Sildenafil citrate was determined through charge transfer complexes (CTC) formation with three electron acceptor reagents. The methods involve the reaction of Sildenafil citrate as n-donor with either...

Preserving Data Consistency through Neighbor Replication on Grid Daemon

A. Noraziah — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.751.758

In modern distributed systems, replication receives particular attention for providing high data availability, fault tolerance and enhance the performance of the system. It is an important mechanism b...

Combustion Analysis of a CI Engine Performance Using Waste Cooking Biodiesel Fuel with an Artificial Neural Network Aid

Gholamhassan NAJAFI — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.759.767

A comprehensive combustion analysis has been conducted to evaluate the performance of a commercial DI engine, water cooled two cylinders, in-line, naturally aspirated, RD270 Ruggerini diesel engine us...

Engineering Properties and Compressibility Behavior of Tropical Peat Soil

Youventharan Duraisamy — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.768.773

This paper presents the engineering properties and compressibility behavior of various types of tropical peat soil collected from several locations in Malaysia. These soils represented fibric, hemic a...

The Influence of Consumers Behavior on the Variables Determining Residential Property Values in Lagos, Nigeria

M.O. Bello — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.774.778

The objective of this study was to assess the influence of consumer behaviour on the variables determining residential property values in Lagos metropolis and how Nigerian valuers are incorporating th...

Mathematical Modeling of a Tactile Sensor with Applications in Minimally Invasive Surgery

Ashkan Mirbagheri — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.779.785

This paper describes mathematical modeling of a novel supported tactile sensor. This system has only three or four sensing elements instead of an array configuration. By writing a code, together with ...

Compressibility Behavior of Tropical Peat Reinforced with Cement Columns

Youventharan Duraisamy — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.786.791

This paper presents the compressibility of tropical peat reinforced with cylindrical cement columns. When a cement column is installed vertically in peat, its compressibility is reduced because of the...

A Recurrence Formula for Computing the Derivative of Composition of Functions

A. A. Taani — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.792.794

A new recursion formula for computing the n-th derivative of the composition of two functions has been introduced in this contribution. The importance of this new formula is associated with its counte...

A Bipolar Cockcroft-Walton Voltage Multiplier for Gas Lasers

Shahid Iqbal — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.795.801

A bipolar Cockcroft-Walton voltage multiplier (CWVM) is proposed as an attractive alternative to the symmetrical Cockcroft-Walton voltage multiplier for continuous wave gas lasers (e.g. carbon dioxide...

Empirical Analysis: Business Cycles and Inward FDI in China

Qiyun Fang — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.802.806

It is well-known that the current speeding-up of globalization has been, on one hand, spreading macro economic effects around the world, while, on the other, fueling firms' activities of crossing nati...

Contribution of the Entropy Function to the Study of Collimator for Nuclear Medicine Imaging

M.S. Bouhdima — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.807.814

Scintigraphic image currently used in the diagnosis or the evaluation process of tissues, is strongly dependant on several technical parameters specially collimator characteristics. The present work d...

Design and Modeling of a New Tactile Sensor Based on Membrane Deflection

Ali Tavakoli Golpaygani — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.815.820

The designed sensor can detect 2D surface texture image, contact-force, and softness of the sensed object. It consists of a chamber for pneumatic actuation and a membrane with a mesa structure. The se...

Using GIS for Retail Planning in Jeddah City

Abdulkader A Murad — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.821.827

The aim of this paper was to identify the possibilities of using Geographical Information Systems (GIS) in retail planning field. A spatial database was created for one major retail center called Corn...

Adoption of Peer-To-Peer Assessment in a Computing Skills Course

Mansoor Al-A'ali — 2007-10-31

American Journal of Applied Sciences, Published online: 31 October 2007; doi:10.3844/ajassp.2007.828.833

The process of peer-to-peer assessment brings great benefits to the teaching and learning process. This paper presents a peer assessment model which was applied to students enrolled in a generic comp...