Volume 8, Issue 1 (2015) | American Journal of Engineering and Applied Sciences

Analysis of Time-Delayed Neural Networks via Rightmost Eigenvalue Positions

Sun Yi — 2015-01-26

American Journal of Engineering and Applied Sciences, Published online: 26 January 2015; doi:10.3844/ajeassp.2015.1.10

Neural networks have been frequently used in various areas. In the implementation of the networks, time delays and uncertainty are present and known to lead to complex behaviors, which are hard to pre...

Three Dimensional Investigation of Mode I Stress Intensity Factor Variations in Crack Front Using Finite Element Method

M. M. Mirsayar — 2015-01-26

American Journal of Engineering and Applied Sciences, Published online: 26 January 2015; doi:10.3844/ajeassp.2015.11.16

Overall failure may occur in many engineering structures due to the initiation and growth of cracks. Stress intensity factors are extensively used to investigate crack growth in Linear Elastic Fractur...

A Novel Method to Improve Weld Uniformity by Automatic Control of Current Intensity

Abdul Aziz A. Morgan — 2015-01-26

American Journal of Engineering and Applied Sciences, Published online: 26 January 2015; doi:10.3844/ajeassp.2015.17.25

This study aims to develop an automatic arc welding system capable of welding irregular and moving joints which are difficult to weld manually. The motivation of this research comes from the need to p...

Analysis of Low Probability of Intercept Radar Signals Using the Reassignment Method

Daniel L. Stevens — 2015-03-25

American Journal of Engineering and Applied Sciences, Published online: 25 March 2015; doi:10.3844/ajeassp.2015.26.47

Digital intercept receivers are currently moving towards classical time-frequency analysis techniques for analyzing low probability of intercept radar signals. Although these techniques are an improve...

Industrial Waste-an Economical Approach for Adsorption of Heavy Metals from Ground Water

Margherita Pettinato — 2015-04-10

American Journal of Engineering and Applied Sciences, Published online: 10 April 2015; doi:10.3844/ajeassp.2015.48.56

A by product from steel industry mainly known as blast furnace slag is a waste product which was tested for the removal of As(III), from ground water. Steel slag is a commercial waste material mainly ...

An Evolving Autoregressive Predictor for Time Series Forecasting

De Z. Li — 2015-04-08

American Journal of Engineering and Applied Sciences, Published online: 8 April 2015; doi:10.3844/ajeassp.2015.57.62

Autoregressive (AR) model is a common predictor that has been extensively used for time series forecasting. Many training methods can used to update AR model parameters, for instance, least square est...

Geometrical Synthesis of the Distribution Mechanisms

Florian Ion T. Petrescu — 2015-04-13

American Journal of Engineering and Applied Sciences, Published online: 13 April 2015; doi:10.3844/ajeassp.2015.63.81

In this study the author presents shortly some few original trigonometric methods to make the synthesis of some main distribution mechanisms. One presents four main modules of distribution mechanisms,...

Cyclic Prefix Length Determination for Orthogonal Frequency Division Multiplexing System over Different Wireless Channel Models Based on the Maximum Excess Delay Spread

Amar Al-Jzari — 2015-04-13

American Journal of Engineering and Applied Sciences, Published online: 13 April 2015; doi:10.3844/ajeassp.2015.82.93

Cyclic Prefix (CP) is one of the key OFDM parameters. It is used to completely eliminate both Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) as long as the CP length is greater t...

Path Loss Measurements for Wireless Communication in Urban and Rural Environments

Yahia Zakaria — 2015-04-16

American Journal of Engineering and Applied Sciences, Published online: 16 April 2015; doi:10.3844/ajeassp.2015.94.99

Path loss models are useful planning tools that allow the designers of wireless communication networks to achieve optimal levels for the base station deployment and meeting the expected service level ...

Design and Dynamic Simulation of a Combined System Integration Concentrating Photovoltaic/Thermal Solar Collectors and Organic Rankine Cycle

Francesco Calise — 2015-04-17

American Journal of Engineering and Applied Sciences, Published online: 17 April 2015; doi:10.3844/ajeassp.2015.100.118

This study presents the design of a novel ultra-high efficient solar power system. The system is equipped with a concentrating PhotoVoltaic/Thermal (CPVT) solar collectors bottomed by an Organic Ranki...

Effect of the Maximum Density Ratio Between Liquid and Vapor on Cavitating Simulation

Guangjian Zhang — 2015-04-21

American Journal of Engineering and Applied Sciences, Published online: 21 April 2015; doi:10.3844/ajeassp.2015.119.126

The Filter-Based Model (FBM), which was built into CFX through CFX Expression Language (CEL) and a homogeneous cavitation model were employed to simulate cavitating flow around a 2D Clark-y hydrofoil....

Machine Motion Equations at the Internal Combustion Heat Engines

Florian Ion T. Petrescu — 2015-04-21

American Journal of Engineering and Applied Sciences, Published online: 21 April 2015; doi:10.3844/ajeassp.2015.127.137

This paper presents an algorithm for setting the dynamic parameters of the classic main mechanism of the internal combustion engines. One presents the dynamic, original, machine motion equations. The ...

Investigating Bio-Char as Flow Modifier and Water Treatment Agent for Sustainable Pavement Design

Renaldo Walters — 2015-04-22

American Journal of Engineering and Applied Sciences, Published online: 22 April 2015; doi:10.3844/ajeassp.2015.138.146

The life expectancy of Asphalt Binder (AB) has been negatively impacted by the harsh bombardment of Ultraviolet (UV) rays. UV rays cause asphalt to oxidize faster, which results in the deterioration o...

The Complex Probability Paradigm and Analytic Linear Prognostic for Vehicle Suspension Systems

Abdo Abou Jaoude — 2015-04-22

American Journal of Engineering and Applied Sciences, Published online: 22 April 2015; doi:10.3844/ajeassp.2015.147.175

The Andrey N. Kolmogorov's system of axioms can be extended to encompass the imaginary set of numbers and this by adding to his original five axioms an additional three axioms. Hence, any experim...

Investigating Effects of Application of Silica Fume to Reduce Asphalt Oxidative Aging

Nader Abutalib — 2015-04-22

American Journal of Engineering and Applied Sciences, Published online: 22 April 2015; doi:10.3844/ajeassp.2015.176.184

This paper investigates the feasibility of using silica fume to enhance the rheological properties of asphalt binder. It has been widely reported that asphalt binder oxidation is one of the phenomena ...

Multi-Objective Evolutionary Optimization of Sandwich Structures: An Evaluation by Elitist Non-dominated Sorting Evolution Strategy

Ilyani Akmar, A.B — 2015-04-22

American Journal of Engineering and Applied Sciences, Published online: 22 April 2015; doi:10.3844/ajeassp.2015.185.201

In this study, an application of evolutionary multi-objective optimization algorithms on the optimization of sandwich structures is presented. The solution strategy is known as Elitist Non-Dominated S...