Volume 2, Issue 10 (2005) | American Journal of Applied Sciences

Balancing Treatment and Prevention: The Case of HIV/AIDS

Joseph Y.T. Mugisha — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1380.1388

A mathematical model is formulated to study the effect of treatment of HIV/AIDS patients on the spread of the epidemic in a two-age group’s population. The model assumes the sexual transmission mode...

Flow of Dividends under a Constant Force of Interest

Juma Kasozi — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1389.1394

This study addresses the issue of maximization of dividends of an insurer whose portfolio is exposed to insurance risk. The insurance risk arises from the classical surplus process commonly known as t...

Estimation Techniques for Monitoring and Controlling the Performance of the Computer Communication Networks

Ibrahiem M.M. El Emary — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1395.1400

This study was concerned with making a comparative study between four types of time series model with the goal of choosing the optimum one to predict the performance of a computer communication networ...

EOS: Evolutionary Overlay Service in Peer-to-Peer Systems

L. I. Zhijun — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1401.1406

The peer-to-peer (P2P) systems nowadays can be mainly classified into two categories: structured and structure-less systems based on their overlay organization. The structured systems can achieve dete...

Fault Detection of Computer Communication Networks Using an Expert System

Ibrahiem M.M. El Emary — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1407.1411

The main objective of this study was to build an expert system for assisting the network administrator in his work of management and administration of the computer communication network. Theory of ope...

Determination of Absorption Coefficients and Thermal Diffusivity of Modulated Doped GaAlAs/GaAs Heterostructure by Photothermal Deflection Spectroscopy

S. Aloulou — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1412.1417

We report in this study theoretical and experimental studies of photothermal deflection spectroscopy (PDS) for planar doped heterostructures AlGaAs/GaAs. The PDS spectra at T=300K are recorded by vary...

Harmonics Study and Comparison of Z-source Inverter with Traditional Inverters

B. Justus Rabi — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1418.1426

This paper presents an Impedance Source Inverter for A.C electrical drives. The impedance source inverter employs a unique impedance network cable with inverter main circuit and rectifier. By controll...

Experimental Evaluation of Anti-Stripping Additives Mixing in Road Surface Pavement Materials

Tienfuan Kerh — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1427.1433

Most road surfaces in Taiwan are paved with asphalt concrete but the phenomena of rutting, cracking and stripping of the pavement are frequently occurring due to the effects of traffic flow, thermal v...

Harmonic Elimination of Inverters using Blind Signal Separation

B. Justus Rabi — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1434.1437

Harmonics cause major problems in power system due to non linear loads. With the rapid growth in the utilization of the rectifier for critical loads, e.g. In computer or medical equipment the need for...

Modeling of Transient Heat Flux in Spark Ignition Engine During Combustion and Comparisons with Experiment

T. F. Yusaf — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1438.1444

A quasi-one dimensional engine cycle simulation program was developed to predict the transient heat flux during combustion in a spark ignition engine. A two-zone heat release model was utilized to mod...

Pattern Classification: An Improvement Using Combination of VQ and PCA Based Techniques

Alok Sharma — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1445.1455

This study firstly presents a survey on basic classifiers namely Minimum Distance Classifier (MDC), Vector Quantization (VQ), Principal Component Analysis (PCA), Nearest Neighbor (NN) and K-Nearest Ne...

Properties of Absolute Stability in the Presence of Time Lags

M. De la Sen — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1456.1463

This study is concerned with the properties of absolute stability independent of the delays of time-delay systems, possessing non commensurate internal point delays, for any nonlinearity satisfying a ...

Analyzing the Electricity Consumption Using Experimental Design Technique

S. F. Ghaderi — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1464.1470

Experimental design technique is a powerful tool that is used in uncertainty cases, when a great amount of data is available. In this paper, the effects of different factors on the determination of el...

Chromium (III) Removal and Recovery from Tannery Wastewater by Precipitation Process

Abass Esmaeili — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1471.1473

Chromium (III) salts are the most widely used chemicals for tanning processes, but 60-70% of total chromium salts reacts with the hides. In the other word, about 30-40% of the chromium amount remains ...

Numerical Investigation of Flow Control by Suction and Injection on a Subsonic Airfoil

M. H. Shojaefard — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1474.1480

This study presents a numerical study concerning flow control by suction and injection. The case studied is the flow field over a subsonic airfoil with four suction and injection slots on the suction ...

Stability of Non-Neutral and Neutral Dynamic Switched Systems Subject to Internal Delays

M. De la Sen — 2005-10-31

American Journal of Applied Sciences, Published online: 31 October 2005; doi:10.3844/ajassp.2005.1481.1490

This study deals with the quadratic stability and linear state-feedback and output-feedback stabilization of switched delayed linear dynamic systems with, in general, a finite number of non commensura...