Since ancient past humans have attempted to harness the wind energy through diversified means and vertical axis wind turbines (VAWTs) were one of the major equipment to achieve that. In this modern time, there is resurgence of interests regarding VAWTs as numerous universities and research institutions have carried out extensive research activities

Several control policies of Q-car 2-DOF semiactive system, namely skyhook, groundhook and hybrid controls are presented. Their ride comfort, suspension displacement and road-holding performances are analyzed and compared with passive system. The analysis covers both transient and steady state responses in time domain and transmissibility response i

The primary sources of drag for a straight-bladed vertical axis wind turbine (SB-VAWT) are the blades which are also responsible for generating lift. The supporting struts of a SB-VAWT are also responsible for generating additional parasitic drag which reduces the overall power output. It is one of the major disadvantages of the SB-VAWTs as the los

Several control policies of F-car 7-DOF semiactive system, namely skyhook, groundhook and hybrid controls are presented, as a continuation of the previous work on Q-car 2-DOF and H-car 4-DOF models. Their ride comfort, suspension displacement and road-holding performances are analyzed and compared with passive system. The analysis covers both trans

We have fabricated carbon nanotube �CNT� field-effect transistors �FETs� by direct growth of single-wall CNTs between the source and drain electrodes, and investigated their device characteristics. The FETs show ambipolar operation. The temperature and bias voltage dependence of device characteristics are consistent with device operation o

Microclimate studies are commonly required for new projects especially urban masterplanning that involves the development of a sizeable area within a city. Basically data from microclimate studies gathered from semioutdoor spaces i.e. on airflow, sunlight, lighting and irradiation are typically gathered through field measurements and environment si

The term fair price is commonly used in retail business. To encourage retail business outlets to keep fair prices for their products, Malaysian Government has instituted Fair Price Shop Awards since 2003. More than 100 retail outlets win this award every year in 14 categories. The present paper attempts to identify the most common strategies that h

The paper discusses the processes of implementing virtual reality to highlight salient aspects of traditional urban planning and constructional aspects of a heritage complex; and the development of three dimensional (3D) user interfaces to view and navigate through the model.The interface allows flexible navigation to explore the space and construc

Modern wind turbines are categorized as horizontal axis wind turbines (HAWTs) and vertical axis wind turbines (VAWTs), which are currently being utilized for diversified applications. The basic theoretical advantages of VAWTs are: (i) they accept the wind from any direction, and (ii) the generator, gearbox etc. can be placed on the ground. Selectio

In this paper, a 1 kW straight-bladed vertical-axis Darrieus wind turbine is designed using the cascade theory. The effects of dynamic stall and flow curvature, in addition to solidity, design power coefficient, design tip speed ratio, design wind speed, cut-out speed, and blade supporting type (simple, overhang), have been considered. For the perf