Volume 4, Issue 5 (2007) | American Journal of Applied Sciences

Environmental Assessment of a Diesel Engine Under Variable Stroke Length and Constant Compression Ratio

Jehad A.A. Yamin — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.257.263

In the light of the energy crisis and the stringent environmental regulations, diesel engines are offering good hope for automotive vehicles. However, lot of work is needed to reduce the diesel exhaus...

Turbo-coding of Coherence Multiplexed Optical PPM CDMA System With Balanced Detection

K. Chitra — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.264.268

The effects of turbo-coding on the coherence multiplexed optical PPM CDMA systems are shown by evaluating bit error rate (BER) with respect to system parameters such as interleaver length (K), number ...

A Scheduling Algorithm Based on Petri Nets and Simulated Annealing

Rachida Hadiby Ghoul — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.269.273

This study aims at presenting a hybrid Flexible Manufacturing System "HFMS" short-term scheduling problem. Based on the art state of general scheduling algorithms, we present the meta-heuristic, we ha...

Measuring the Costs of Production Based on Sizes of Farm Operation: A Study on Rice Farmers in Jessore District of Bangladesh

Shaikh Moksadur Rahman — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.274.283

The quantity of rice production has increased regardless of the land operation size in recent years, but small and medium farmers still have a serious problem especially regarding the increasing cost ...

Effects of Low Frequencies on Three Phase Induction Motor Performance Operating in Close Proximity to Rated Speed

Qazem Jaber — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.284.293

Variable speed drives (VSD) are adhered to induction motors in most of the present industrial applications. And since the world has become more conscientious to energy saving, inverters established th...

Investigation of An Acoustic Temperature Transducer and its Application for Heater Temperature Measurement

Mohammad A.K. Alia — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.294.299

Recent developments in temperature measurement have encouraged researchers to develop low-cost, simple structure, computerized generic transducers for environmental monitoring and industrial process c...

Parallel Approaches for Intervals Analysis of Variable Statistics in Large and Sparse Linear Equations with RHS Ranges

Peerayuth Charnsethikul — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.300.306

This study proposes an algorithm capable of working in parallel for solving large and sparse linear equations under given right hand side (RHS) ranges. A comparative study to the direct linear program...

Using PLC for Custom-design of a PID/PWM Program to Control a Heater Temperature

Mohammad A.K. Alia — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.307.316

This is a practical approach to control a continuous-time process variable (temperature) using a discrete controller (PLC) and a custom-designed software control algorithm and hardware interface, in a...

Resource Leveling Using Petrinet and Memetic Approach

K. Raja — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.317.322

The problem of scheduling activities dynamic for a project, within the available resources and adhering to precedence relationships is NP hard combinatorial. Traditional approaches and their extension...

Structural Analysis of Borotellurite Glass

M.K. Halimah — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.323.327

The average cross-link density, number of the network bonds per unit volume, average stretching force constant, atomic ring size and the ratio Kbc/Ke have been calculated and discussed according to bo...

Comparative Study of Clinker's Transformation at Different Temperature Zone During Cement Production

Mohd Sobri Idris — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.328.332

Chemical composition analysis using x-ray fluorescence is one of the important quality analysis for examining of cement and widely used in cement industries for a long time as a tool to estimate phase...

A Novel Multicast Routing Protocol for Mobile Ad Hoc Networks

Zeyad M. Alfawaer — 2007-05-31

American Journal of Applied Sciences, Published online: 31 May 2007; doi:10.3844/ajassp.2007.333.338

In mobile ad hoc networks, how to achieve the multicast communication is a challenging task due to the fact that the topology may change frequently and communication links may be broken because of use...