Published Articles Archive

This article investigates the meteorological parameters database for six locations in Peninsula Malaysia (Kuala Lumpur (KL), Johor Bahru (JB), Malacca, Ipoh, Kuantan, and Bayan Lepas) comparing to NASA database. Hourly measurements of global solar radiation, ambient temperature and wind speed were obtained from Malaysia Meteorological Department (MMD) between years 2005-2009. The conducted investigation shows that th...

Modulation techniques play a significant role in minimizing the effect of noise produced by noisy channels, especially thermal noise produced due the heat effect in electronic communication systems. The effect of noise has a significant value in wireless communication systems and can affect the performance of systems and be increasing the probability of error. This increasing of the probability of error will be over...

Minimum (frequency) Shift Keying (MSK) is a spectrally efficient modulation scheme compared with other constant envelope modulation schemes. However, its main sidelobe can be of some worry in digital data transmission, particularly over nonlinear channels. Therefore, it is practically of interest to search for pulse shaping schemes, largely proposed through baseband pulse shaping to reduce sideband power, which in tu...

Nowadays, the water problem becomes an international issue. So, it is a critical step for scientists to use science and new technologies to solve this global problem. While many of them seeking for solutions that based on finding new water recourses, others trying to use different methods for saving water consumption. The lack of water supply in Saudi Arabia and specifically always been the major constraint on agricu...

Oil and gas remain the largest sources of the primary energy used for the production of electricity in KSA. Based on data published in the paper, 57% of electricity generation comes from oil and 43% come from gas. The governmental buildings consume about 11% of the total national energy consumption, and 60% of this percentage is lost due to the misuse of the light and air conditions. This loss could be reduced by usi...

The power and energy normalisation to increase the performance of multi-core processors is one of the challenges for processor designers. Several models cover the power and performance of multi-core processors. In this work, models are discussed and an extended model is proposed to consider the advantages and drawbacks of these architecture models. The target is to get a high acceleration based on the optimum balance...

In this work, the water-filling system is proposed to calculate the energy consuming of power allocation in OFDM-based cognitive radio systems. The conventional water-filling algorithm shows high complexity. To minimise this complexity and to minimise the energy-consuming, a simplified water-filling algorithm is modified. It was evident from extracted results that lowering complexity and minimising the energy-consumi...

One of the most widely used techniques is the perturb and observe algorithm, which periodically perturbs the operating point of the PV array, sometime with an adaptive perturbation step, and compares the PV power before and after the perturbation. Many maximum power point tracking techniques for photovoltaic systems are well established in the literature. The paper presents maximum power point tracking concepts for p...

Demand of the renewable energy resources is increasing nowadays due to economic growth and environmental issues. This work develops a grid-connected photovoltaic model to produce clean energy with maximum efficiency. An electronic controller for PV panels interfacing with the grid is designed. The model consists of maximum power point tracking coupled with a DC boost converter connected with a line commutated inverte...