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

Mathematical Modeling of Wastewater Oxidation under Microgravity Conditions

Boyun Guo — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.473.482

Volatile removal assembly (VRA) is a module installed in the International Space Station for removing contaminants (volatile organics) in the wastewater produced by the crew. The VRA contains a slim p...

An Analysis of the Output and Employment Conversion Matrices of Australia's Economy

Abbas Valadkhani — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.483.490

Based on two snapshots taken from the Australian economy, this study quantifies the impacts of final demand aggregates on output and employment in various sectors using the 1989 and 1997 conversion ...

Energy and Carbon Flux Coupling: Multi-ecosystem Comparisons Using Artificial Neural Network

Assefa M. Melesse — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.491.495

A multi-ecosystems carbon flux simulation from energy fluxes is presented. A new statistical learning technique based on Artificial Neural Network (ANN) back propagation algorithm and multi-layer pe...

Social-economic and Ecological Criteria of Noise Control

M. A. Al-Nawafleh — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.496.498

When designing new and/or modifying pre-existing equipment, the problem of economic feasibility is always of prime importance . However, the economic feasibility is often a matter of discussion in v...

The Situation and Evaluation of Forest Harvesting Methods in Turkey

Murat Demir — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.499.503

The present study summarize and evaluate major problems of timber harvesting in Turkey and the future principles and objectives have been defined. Timber harvesting in Turkey is still carried out by...

A Causal Relationship and Macroeconomic Activity: Empirical Results From European Union

Chaido Dritsaki — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.504.507

This study investigates the relationship among macroeconomic variables using quarterly data for European Union covering the period from 1970 I to 2000 IV. The purpose of this study is to estimate th...

Preparation of Cellulosic Membrane Containing Pyrrolidone Moiety Via Radiation Induced Grafting and its Application in Wastewater Treatment

A. S. Aly — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.508.513

Radiation induced grafting of vinyl pyrrolidone onto cellulose wood pulp was carried out in heterogeneous and homogenous media using gamma radiation. Cellulose wood pulp was used in different forms;...

A Conceptual Design of the Concurrent Engineering Design System for Polymeric-Based Composite Automotive Pedals

S. M. Sapuan — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.514.525

In this study, a study of conceptual design for the polymeric-based composite automotive pedal box system is presented. This study describes the importance of the concurrent engineering technique in t...

Effect of Cathodically Charged Hydrogen on the Microhardness of Pure Copper

Ghazi S. AL-Marahleh — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.526.532

The effect of hydrogen on the microhardness of pure copper was investigated after experiments conducted on specimens that hydrogen charged under different cathodic charging conditions. Microhardness...

RAM 1.0 Software for Gaussian-Plume Multiple Source Air Quality Simulation

Liren Yu — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.533.538

This study presents a developed software in environmental engineering, namely RAM 1.0 (RAM: Regulatory Air Model), adopted completely Graphical User Interface (GUI) technique, for operating in vario...

By-pass Devices as Effective Means of Protection from the Hydraulic Hammer

Khalid S. Al-Rababa — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.539.541

Switching-off the parallel working pump units causes sudden discharge changes in parallel pipe lines, as a result of that hydraulic shocks takes place. The damping of these shocks can be achieved by...

Replacement Heifer Selection in A Beef Cattle Herd

Akin Pala — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.542.544

The relationship between a heifer's weaning weight and her fertility and weaning weight of her calves was studied. Also investigated was the effect of dam amount of fat (DAF=dam weaning weight/weani...

An Investigation of the Effect of Aspect Ratio on the Airfoil Performance

M. Kopaç — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.545.549

The effect of aspect ratio on the airfoil performance is investigated for airflow about axially symetric wings as a function of the angle of attack. The magnitudes of aerodynamic forces and moments ...

Soil Degradation Risk Prediction Integrating RUSLE with Geo-information Techniques, the Case of Northern Shaanxi Province in China

Mushtak T. Jabbar — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.550.556

This research integrated the Revised Universal Soil Loss Equation (RUSLE) with RS, GIS and GPS techniques to quantify soil erosion risk and the northern part of Shaanxi province in China was taken a...

Wind Speed Simulation Using Wavelets

A. H. Siddiqi — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.557.564

Most of the renewable energy sources have direct or indirect link with the sun. Wind is also a form of solar energy. It is initiated by uneven heating of the atmospheric air by the sun, affected fro...

On Quasi E-Convex Bilevel Programming Problem

E. A. Youness — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.565.568

Bilevel programming problems involve two optimization problems where the data of the first one is implicity determined by the solution of the second. This study introduces the notions of E-convexity ...

Production of Cellulase from Oil Palm Biomass as Substrate by Solid State Bioconversion

Md. Z. Alam — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.569.572

Solid state bioconversion (SSB) of lignocellulosic material oil palm biomass (OPB) generated from palm oil industries as waste was conducted by evaluating the enzyme production through filamentous f...

ED-XRF Analysis of Total Suspended Particulates from Enamelware Manufacturing Industry

J. A. Sonibare — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.573.578

Concentration and elemental composition of the total suspended particulates (TSP) emitted due to manufacturing activities of an enamelware industry in Lagos, Nigeria were investigated. Gravimetric m...

Strong Dependence at the Long Run and the Cyclical Frequencies in the Specification of the US Unemployment Rate

L. A. Gil-Alana — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.579.590

This study deals with the presence of long range dependence at the long run and the cyclical frequencies in the specification of the US unemployment rate. We use a parametric procedure that permits ...

Impulse Volt-Time Characteristics of Oil and OIP Insulation

S. Venkatesan — 2005-02-28

American Journal of Applied Sciences, Published online: 28 February 2005; doi:10.3844/ajassp.2005.591.596

Estimation of insulation strength of transformer oil and Oil Impregnated Paper (OIP) insulation, which constitutes major portion of insulation in power transformer, is an important task. Also, it is...