Volume 5, Issue 4 (2008) | American Journal of Applied Sciences

Electrical, Structural, Magnetic and Transport Properties of Zn₂ Ba Fe₁₆ O₂₇ Doped With Cu²⁺

D. M. Hemeda — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.289.295

Series of polycrystalline samples of Zn2-x Cux Ba Fe16 O27 were prepared by usual ceramic methods, where (x=0.0, 0.4, 0.6, 0.8, 1.0, 1.4) . X-ray analysis were obtained at room temperature using Coka ...

The Effect of Corner Radii and Part Orientation on Stress Distribution of Cold Forging Die

Ahmad Baharuddin Abdullah — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.296.300

One of the most critical problems in cold forging is the huge stresses generated from the deformation of metal leads to die failure. The distribution of stresses mainly depends on geometry of the die....

Mathematical Model to Simulate Tuberculosis Disease Population Dynamics

O.K. Koriko — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.301.306

A mathematical model to depict Tuberculosis disease population dynamics was presented. The model population was compartmentalised as appropriate and the resulting model equations were solved numerical...

Physiochemical Properties of Sago Starch Modified by Acid Treatment in Alcohol

P.H. Yiu — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.307.311

Sago starch is usually chemically modified to overcome and improve the unstable properties of native sago starch during processing. In this study, sago starch was treated in hydrochloric acid in the p...

Low Power Modulo 2ⁿ+1 Adder Based on Carry Save Diminished-One Number System

Somayeh Timarchi — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.312.319

Modulo 2n +1 adders find great applicability in several applications including RNS implementations. This paper presents a new number system called Carry Save Diminished-one for modulo 2n+1 addition an...

A Three-Microphone Adaptive Noise Canceller for Minimizing Reverberation and Signal Distortion

Zayed M. Ramadan — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.320.327

This paper introduces an adaptive noise canceller (ANC) to improve the system performance in the presence of signal leakage components. The proposed ANC consists of two adaptive filters and three micr...

Experimental Investigation on Three Dimensional RC Infilled Frame - RC Plane Frame Interactions With Slab for Seismic Resistance

Suyamburaja Arulselvan — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.328.333

Experimental investigation was planned and conducted to study the influence of brick masonry infill and slab in a three-dimensional reinforced cement concrete frame. In this study, one-fifth scale 3D ...

A Cost Estimation Model for Repair Bridges Based on Artificial Neural Network

Mohamed Bouabaz — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.334.339

Estimating the total cost of bridges repair and maintenance with high accuracy is an important components, and points to a need for a cost estimation model. This paper focuses on the development of a ...

Effect of Stent Geometry on Phase Shift between Pressure and Flow Waveforms in Stented Human Coronary Artery

Vahab Dehlaghi — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.340.346

Shear stress is known to play a central role in restenosis formation and is sensitive to stent geometry. Alterations of the phase shift between pressure and flow waveform created by a different stents...

Kinetic Study of the Effect of Selected Surfactants on Corrosion of Copper

Howaida M. El-Kashlan — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.347.354

The rates of copper corrosion were determined by measuring the limiting current of anodic dissolution of copper in phosphoric acid in presence and in absence of cetyl trimethyl ammonium bromide (CTAB)...

Numerical Investigation Into The Behavior of Circular Pad Shallow Foundations Supported By Geogrid Reinforced Sand

S. M. Marandi — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.355.368

This study seeks to widen the pool of knowledge on the use and characteristics of geosynthetics, specifically in the area of circular foundations supported by geosynthetic reinforced sand. The main ob...

The Relationship Between National Culture and E-Adoption: A Case Study of Iran

Akram Hadizadeh Moghadam — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.369.377

National Culture, in the sense of the shared traditions and representations of a society, has a profound effect on the design, adoption and the use of Information Technologies in each society. E-Adopt...

SNL2Z: Tool for Translating an Informal Structured Software Specification into Formal Specification

Mohamed A. Sullabi — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.378.384

In the area of software engineering there have been very few efforts to automate the translation from specifications written in natural language to the formal specification languages. Writing of the s...

Neural-Based Models of Semiconductor Devices for SPICE Simulator

Hanene Ben Hammouda — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.385.391

The paper addresses a simple and fast new approach to implement Artificial Neural Networks (ANN) models for the MOS transistor into SPICE. The proposed approach involves two steps, the modeling phase ...

Manganese Uptake By Facultative and Obligate Wetland Plants Under Laboratory Conditions

A. E. Ghaly — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.392.404

The effect of initial concentrations of manganese on the overall removal efficiency of Mn by wool grass, soft rush, broad leaved cattail and soft stem bulrush plants was investigated under laboratory ...

Cost Analysis of A System with Preventive Maintenance by Using the Kolmogorov’s Forward Equations Method

Khaled Moh. El-Said — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.405.410

This study deals with cost analysis of a two- unit cold standby redundant system with preventive maintenance.The random failure occurs at random times which follow an exponential distribution and also...

Random Walk Models Classifications: An Empirical Study for Malaysian Stock Indices

Chin Wen Cheong — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.411.417

This article studied the Random Walk models introduced by Campbell et al.[2] for Malaysian stock market. The analysis is implemented under the possible drastic economics structural change using an ite...

Image Recognition Using Combination of Discrete Multi_Wavelet and Wavenet Transform

Dr Mikhled Alfaouri — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.418.426

Focus of the method was to present image identification and labeling using new combination of dynamic transforms. This method is based on using the combination of the Discrete Multi-wavelet Transform ...

Design and Development of Broadband Inverted E-shaped Patch Microstrip Array Antenna For 3G Wireless Network

Norbahiah Misran — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.427.434

Microstrip patch antenna has been received tremendous attention since the last two decades and now it becomes a major component in the development of Smart Antenna System for Third-Generation Wireless...

Electronic Energies in Delta Doped AlGaAs/GaAs Heterostuctures

A. Meftah — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.435.439

The band bending of the potential at the AlGaAs/GaAs interface increases with the electrons concentration in the GaAs channel. This band bending is often ignored in the theoretical calculation of the ...

A Comparative Study of the Purification of Aquaculture Wastewater Using Water Hyacinth, Water Lettuce And Parrot’s Feather

A. M. Snow — 2008-04-30

American Journal of Applied Sciences, Published online: 30 April 2008; doi:10.3844/ajassp.2008.440.453

Water hyacinth, water lettuce and parrot’s feather plants were examined for their ability to remove nutrients from aquaculture wastewater at two retention times. During the experiment, the aquatic p...