Fauzi Mohd Johar

A review of Genetic Algorithms and Parallel Genetic Algorithms on Graphics Processing Unit (GPU)

Genetic Algorithms (GAs) is proven to be effective in solving many optimization tasks. GAs is one of the optimization tools used widely in solving problems based on natural selection and genetics. This paper is intended to cover the study of GA and parallel GA and analyses its usage in CPU and GPU. One of the popular ways to speed up the processing time was by running them as parallel. The idea of parallel GAs may refer to an algorithm that works by dividing large problem into smaller tasks. Broad literature review in this paper includes a categorization of the GA operations that involved with some theories and techniques used in GA, presented with the aid of diagrams. This review attempts to study and analyse the behaviour of GA and parallel GA categories to work in GPU depending on the type of genetic algorithm. Parallel GA for GPU covers the architecture of Compute Unified Device Architecture (CUDA).

Application of Genetic Algorithm to the Design Optimization of Complex Energy Saving Glass Coating Structure

Attenuation of GSM, GPS and personal communication signal leads to poor communication inside the building using regular shapes of energy saving glass coating. Thus, the transmission is very low. A brand new type of band pass frequency selective surface (FSS) for energy saving glass application is presented in this paper for one unit cell. Numerical Periodic Method of Moment approach according to a previous study has been applied to determine the new optimum design of one unit cell energy saving glass coating structure. Optimization technique based on the Genetic Algorithm (GA) is used to obtain an improved in return loss and transmission signal. The unit cell of FSS is designed and simulated using the CST Microwave Studio software at based on industrial, scientific and medical bands (ISM). A unique and irregular shape of an energy saving glass coating structure is obtained with lower return loss and improved transmission coefficient.

2.45 GHz RFID reader array antenna with hexagonal geometry arrangement

In this paper, 2.45 GHz Radio Frequency Identification (RFID) reader antenna with hexagonal geometry is proposed to obtain a high gain directional pattern. The mittering technique is used at each junction of the transmission line to reduce the power loss. The parametric study is conducted to get the best dimension and position of all six elements of truncated patch antenna to operate at 2.45 GHz. The simulation and measurement readings of the antenna are compared. In conclusion, the performance of the designed antenna improves the referenced antenna in terms of gain and size. The measured gain is 9.0 dBi and the size of the designed antenna is about 37% smaller than the referenced antenna.

Mobile prayer times and Qiblat direction using GPS

This paper presented the development an innovative system to determine the Prayer Times and the current digital Qiblat (Kapsilabah) direction in real time using Personal Digital Assistant (PDA)/ Pocket PC with built-in Global Positioning System (GPS). The GUI-based software has been developed to help users determine their current Prayer Times and Qiblat direction automatically even if they are on the move or in any type of vehicles such as in airplanes, ships, trains etc. The GPS receiver will capture information with regards to the userpsilas current location. This information will then be synchronized by this software in order for the whole system to be operated correctly. Therefore, the determination of the prayer times and the Qiblat direction is done by the system automatically, without the requirement to select the current location where it is a standard practice for the existing conventional systems. The idea behind this software is to assist Muslims by providing them with accurate information that can help in their daily duty.

The investigation of single, dual and tri-band frequency selective surface

The single, dual and tri-band Frequency Selective Surface (FSS) design structure is designed and simulated by using CST Microwave Studio software. The reflection (S11) and transmission (S21) of the design FSS structure is analyzed based on the six types of configuration that have been set up. All configurations are simulated with the same size of the FSS design structure. The hybrid material (FR4 and glass) affects the transmission and reflection signals of the FSS which led to the compact structure. The measurement results are agreed for all FSS design structures but the difference is due to the transmission losses.