Volume 4, Issue 9 (2007) | American Journal of Applied Sciences

Potential Air and Groundwater Pollution from Continuous High Land Application of Cheese Whey

A.E. Ghaly — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.619.627

Experiments were performed, using eighteen 280 cm deep soil columns with 20 cm inside diameter, to determine the relative amounts of nitrogenous compounds leached and volatilized from soils receiving ...

A Student-Centered Learning Model

Mihyar Hesson — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.628.636

Based on the authors experience in applying different approaches of active learning and student-centered teaching, the main problem that prevented the achievement of the full advantages of these appro...

Quality Monitoring Using Principal Component Analysis and Fuzzy Logic Application in Continuous Casting Process

Salah Bouhouche — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.637.644

This paper deals with non linear system monitoring, based on a combined use of Principal Components Analysis (PCA) and fuzzy logic to process and quality monitoring. PCA coupled to fuzzy logic was use...

Design, Fabrication, and Testing of a Membrane Piezoelectric Tactile Sensor with Four Sensing Elements

Ashkan Mirbagheri — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.645.652

We presented design, fabrication, and testing of a novel membrane tactile sensing system with only four sensing elements. By using membrane stress combined with triangulation approach, it was possible...

Physical Nonlinearity Under Cyclic Loading In Neutron Flow

Atwa D. Zeyad — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.653.657

The influence of neutron irradiation on the nonlinear elastoplastic deformation of the constructions components under cyclic force disturbance was investigated. The formula of irradiation reinforcemen...

Colored Digital Image Watermarking using the Wavelet Technique

Mohammed F. Al-Hunaity — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.658.662

With the revolution of information technology and Wide Area Networking, data has become less and less private where the access of media as well as the attempts to change and manipulate the contents of...

A Comparative Study between Various Protocols of MANET Networks

Mohammed F. Al-Hunaity — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.663.665

Multicast Ad-Hoc on-Demand Distance Vector (MAODV) protocol keeps sending control packets within static periods whether there was sending of data packets or not, and it was not concerned with the amou...

A Novel High-Speed 54⨯54 bit Multiplier

Pouya Asadi — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.666.672

A new 54⨯54-bit multiplier using high-speed carry-lookahead adder has been fabricated by CMOS technology. This paper presents a self-timed carry-lookahead adder in which the logic complexity was...

IF-THEN Adder Application in Online DALUT Implementation

Mohamed Al Mahdi Eshtawie — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.673.678

This paper presents the application of a proposed if-then rule based adder in implementing distributed arithmetic online lookup table (DALUT). The online DALUT development and implementation is a cont...

Development of an Axisymmetric Thermal Plume between Vertical Plates

Jamil Zinoubi — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.679.685

This investigation analyses the turbulent structure of a thermal plume created by a heated disk, evolving between vertical plates. The objective of the study was to understand the development mechanis...

An Authoring Tool for As-in-Class E-lectures in E-learning Systems

Nael Hirzallah — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.686.692

This study lists and discusses the basic features that any E-Learning system should consider. It also proposes an authoring algorithm, namely Slide Generating Algorithm that uses the Authoring-on-the-...

A Novel Modeling Approach for Collision Avoidance in Robotic Surgery

Reza Ramezanifard — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.693.699

We present a new system that can be used in combination with an array of ultrasonic piezoelectric sensors and has application in surgical navigation procedures. Using the proposed assembly, the maneuv...

Analysis Heat Flow Between Seat and Valve of ICE

M.H. Shojaefard — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.700.708

An interesting application of system identification method is to investigate the heat transfer from the exhaust valve, especially the valve burning at high temperatures. This study consists of experim...

Determination of Metoprolol and Felodipine in Binary Mixture Using Chemometric-Assisted Spectrophotometric and High-Performance Liquid Chromatographic-UV Methods

Hesham Salem — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.709.717

Four methods were developed for simultaneous determination of metoprolol and felodipine without previous separation. In the first method both drugs were determined using first derivative UV spectropho...

Studies on the Influence of Various Blade Outlet Angles in a Centrifugal Pump when Handling Viscous Fluids

M.H.S. Fard — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.718.724

In this study the centrifugal pump performances with different blade outlet angles are tested when handling water and viscous oils as Newtonian fluids. Also, this study shows a numerical simulation of...

Finite Element and Experimental Serviceability Analysis of HSC Beams Strengthened with FRP Sheets

Seyed Hamid Hashemi — 2007-09-30

American Journal of Applied Sciences, Published online: 30 September 2007; doi:10.3844/ajassp.2007.725.735

The use of externally bonded composite sheets or laminates is by now a diffuse technique to strengthen existing RC structures. However, some aspects of flexural condition still need experimental and n...