Volume 5, Issue 3 (2008) | American Journal of Applied Sciences

Evaluating the Implementation and Effectiveness of GIS-Based Application in Secondary School Geography Lessons

Ali Demirci — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.169.178

The purpose of the study was to investigate the barriers preventing the use of Geographic Information Systems (GIS) in secondary school geography lessons and to determine its effectiveness on students...

Oil Palm Biomass As Potential Substitution Raw Materials For Commercial Biomass Briquettes Production

A.B. Nasrin — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.179.183

Palm oil industry generates vast amount of palm biomass. Converting palm biomass into a uniform and solid fuel through briquetting process appears to be an attractive solution in upgrading its propert...

Effect of Evaporator Lengths and Ratio of Check Valves to Number of Turns on Internal Flow Patterns of a Closed-Loop Oscillating Heat-Pipe With Check Valves

S. Rittidech — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.184.188

A visualization study of the internal flow patterns of a closed-loop oscillating heat-pipe with check valves (CLOHP/CV) at normal operating condition for several evaporator lengths (Le), and ratio of ...

A Design Strategy for Volumetric Efficiency Improvement in a Multi-cylinder Stationary Diesel Engine and its Validity under Transient Engine Operation

P. Seenikannan — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.189.196

This paper proposes an approach to improve engine performance of volumetric efficiency of a multi cylinder diesel engine. A computer simulation model is used to compare volumetric efficiency with inst...

Fuel Injection Pressure Effect on Performance of Direct Injection Diesel Engines Based on Experiment

Rosli Abu Bakar — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.197.202

Fuel injection pressures in diesel engine plays an important role for engine performance obtaining treatment of combustion. The present diesel engines such as fuel direct injection, the pressures can ...

Political Stability and Economic Growth in Asia

Muhammad Younis — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.203.208

This study investigates the effects of various factors of political instability on economic growth in selected ten Asian economies during 1990-2005. Our empirical findings show a close relationship be...

Strength and Ductility of Randomly Distributed Palm Fibers Reinforced Silty-Sand Soils

S.M. Marandi — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.209.220

This paper investigates the resultant strength and ductility behavior when randomly distributed palm fibers are used to reinforce silty-sand soils. The composite soils were tested under laboratory con...

Stochastic Inflow Simulation for Searching Rule Curves

Anongrit Kangrang — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.221.226

Rule curves are basic monthly guidelines for long term reservoir operation. Generally, the optimal rule curves are searched by reservoir simulation model and optimization techniques. A traditional res...

Speed Control of Separately Excited DC Motor

Moleykutty George — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.227.233

This paper proposes the speed control of a separately excited dc motor varying armature voltage. The novelty of this paper lies in the application of nonlinear autoregressive-moving average L2 control...

Kinetic Study of the Effect of Benzoic Acid Derivatives on Copper Electrodeposition

Howaida M. El-Kashlan — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.234.241

The effect of anodic oxygen bubbles on the rate of mass transfer in presence of benzoic acid, p-nitro, p-chloro and p-aminobenzoic acids were studied by measuring the limiting current of cathodic depo...

Transmission Congestion Management by Determining Optimal Location of FACTS Devices in Deregulated Power Systems

Seyed Abbas Taher — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.242.247

In a deregulated electricity market, it may always not be possible to dispatch all of the contracted power transactions due to congestion of the transmission corridors. The ongoing power system restru...

Nonlinear Models and Experimental Investigation of Lifetime History of HSC Flexural Beams

K. Masti — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.248.262

The nature of fracture in high strength concrete is brittle and therefore, the investigation behavior of flexural high strength concrete (HSC) members is important. This paper describes the deflection...

Densification Behaviour of a Red Firing Tunisian Triassic Clay

Hajer Baccour — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.263.269

Investigations were undertaken to assess the thermal modification in clay products from Triassic sedimentary deposits. This study deals with the mineralogical, physico-chemical, thermal analysis and f...

An Intelligent Routing Algorithm

Amer Nizar Abu Ali — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.270.275

In this paper we propose a new method of routing in network. The method is based on vague set theory. Our routing method is both static and dynamic in nature and very frequent exchange of routing info...

ECG Signal Denoising By Wavelet Transform Thresholding

Mikhled Alfaouri — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.276.281

In recent years, ECG signal plays an important role in the primary diagnosis, prognosis and survival analysis of heart diseases. In this paper a new approach based on the threshold value of ECG signal...

A Novel Reversible BCD Adder For Nanotechnology Based Systems

Majid Haghparast — 2008-03-31

American Journal of Applied Sciences, Published online: 31 March 2008; doi:10.3844/ajassp.2008.282.288

This paper proposes two reversible logic gates, HNFG and HNG. The first gate HNFG can be used as two Feynman Gates. It is suitable for a single copy of two bits with no garbage outputs. It can be used...