A CASE STUDY OF STUDENT PERFORMANCE IN ELECTRIC CIRCUIT 2 SUBJECT

Institution of Higher Learning plays an important role to produce high quality graduates. The most important factor that determines graduates quality shown in their CGPA. In order to maintain high CGPA, students should perform well especially in their examination where it contributes the most in the assessment. Students should mastered basic subject in order to maintain their grades. This survey is to study the reasons for poor performance of the students in Electric Circuit 2 subject. Findings have shown that student’s performance was not only influence by the lecturer but also interrelated to student’s ability and how they see the learning process it either they are a surface or deep learner

CFD SIMULATION FOR TRAY DRYER OPTIMIZATION

The paper presents the design and analysis of tray dryer system. The design was done in Solidwork while the analysis and simulation performed using ANSYS FLUENT. ANSYS FLUENT is a Computational Fluid Dynamic (CFD) software in which flow fields and other physics are calculated in detail for various engineering applications. The analysis was done to analyze heat transfer and temperature distribution, ressure, air flow and turbulence. Before generating the product in 3D modeling, the basic data or information of tray dryer system is required such as dimension of dryer equipment, air and heat source supply range, sizing method and etc. Through his step, the dryer system development and function ability can be clearly understood by the end of analyzing process is accomplished

Experimental Study on Effect of Reflector Bed Designs Heated by Direct Solar Radiation for Hot Water Storage System

The aim of this research is to investigate the performance of different reflector bed design heated by direct solar radiation for a water storage system that can be used in accordance with the climate of Malaysia country. In general, this research is related to thermal efficient water heating system, specifically to improve the water heating system that exists nowadays. The focus is to improve the thermal efficiency by adding different absorber bed designs. Based on experimental results shown the temperature of the water increases more efficient and faster by using the curve reflector bed

Laminated Jute and Glass Fibre Reinforced Composite for Repairing Concrete Through Wrapping Technique

In the recent decades, the research of natural fibre in concrete structure materials had attracted many researchers and engineers due to its good agreement in mechanical properties, economically and sustainability. In this study, the jute and glass fibre laminated composite for repairing concrete through the wrapping technique was analysed. A total of 66 concrete specimens, 150 x 50 mm each, were tested. Six concrete specimens were kept as control specimen, 30 specimens were laminated with glass fibre-reinforced thermoset (GFRT) and 30 specimens were laminated with jute fibre-reinforced thermoset (JFRT). The vinyl ester (VE) was used as a matrix. Eventually, all specimen was tested using compression and Brazilian testing. It was found that both GFRT and JFRT had the potential to improve the mechanical performance of concrete specimens with the increment of a maximum number of five (5) layers of woven fibre. It was also found that the four (4) layers of JFRT had the highest mechanical properties with improvement of 72.62% compare to GFRT (4 layers). The results presented here may facilitate improvements in the concrete specimen by using JFRT where it had been suggested to have a higher improvement for the concrete specimen with the optimum layers applied. Hence, jute fibre had been proven to have better performance and can replace the use of glass fibre

Laminated Jute and Glass Fibre Reinforced Composite for Repairing Concrete Through Wrapping Technique

In the recent decades, the research of natural fibre in concrete structure materials had attracted many researchers and engineers due to its good agreement in mechanical properties, economically and sustainability. In this study, the jute and glass fibre laminated composite for repairing concrete through the wrapping technique was analysed. A total of 66 concrete specimens, 150 x 50 mm each, were tested. Six concrete specimens were kept as control specimen, 30 specimens were laminated with glass fibre-reinforced thermoset (GFRT) and 30 specimens were laminated with jute fibre-reinforced thermoset (JFRT). The vinyl ester (VE) was used as a matrix. Eventually, all specimen was tested using compression and Brazilian testing. It was found that both GFRT and JFRT had the potential to improve the mechanical performance of concrete specimens with the increment of a maximum number of five (5) layers of woven fibre. It was also found that the four (4) layers of JFRT had the highest mechanical properties with improvement of 72.62% compare to GFRT (4 layers). The results presented here may facilitate improvements in the concrete specimen by using JFRT where it had been suggested to have a higher improvement for the concrete specimen with the optimum layers applied. Hence, jute fibre had been proven to have better performance and can replace the use of glass fibre

Experimental Evaluation of Performance of Different Thermal Boxes Heated by Solar Radiation for Hot Water Storage System

The aim of this research is to investigate the performance of different thermal boxes heated by solar radiation for a water storage system that can be used in accordance with the climate of Asia-Pacific countries. In general, this research is related to thermal efficient water heating system, specifically to improve the water heating system that exists nowadays. The focus is to improve the thermal efficiency by adding different thermal boxes as the absorber bed. By implementing the black body and radiation concept, the air trapped in the box is heated. The trapped air then increases the collisions between the molecules and directly increases the temperature inside the box, higher than the outside environment. Based on theory and concept purposed, the temperature of the water increases more efficient and faster by using radiation heat as the source. Based on 24 hours experimental results revealed steel thermal box is better to be used for tropical weather like Malaysi

Mechanical Properties of Kenaf/Polyester Composites

In this study, the reinforced kenaf fibers using polyester resin composites were processed through vacuum infusion method. Before infusion and reinforced applied, the long kenaf fibers were treated by various concentration of sodium hydroxide(NaOH). The effects of the modification on fiber and also the effect of fiber alkalization on composites then is analyzed for mechanical properties and by using the scanning electron microscopy (SEM). The results showed that the alkalization treatment has improved the mechanical properties of the composites as compared to the composites with untreated kenaf fiber. In addition, a general trend of the mechanical performances of alkalized kenaf fiber composites observed showed increase with the increments of NaOH concentration. In this study, the vacuum infusion method used also offers benefits over hand lay-up method due to the better fiber to resin ratio that resulting in stronger and lighter laminates. By vacuum infusion process, the kenaf-polyester composite manufactured provides an opportunity for replacing the existing materials with a higher strength, low cost alternatives, and environmental friendl

Deferoxamine preconditioning to restore impaired HIF-1α-mediated angiogenic mechanisms in adipose-derived stem cells from STZ-induced type 1 diabetic rats

Objectives: Both excessive and insufficient angiogenesis are associated with progression of diabetic complications, of which poor angiogenesis is an important feature. Currently, adipose-derived stem cells (ADSCs) are considered to be a promising source to aid therapeutic neovascularization. However, functionality of these cells is impaired by diabetes which can result from a defect in hypoxia-inducible factor-1 (HIF-1), a key mediator involved in neovascularization. In the current study, we sought to explore effectiveness of pharmacological priming with deferoxamine (DFO) as a hypoxia mimetic agent, to restore the compromised angiogenic pathway, with the aid of ADSCs derived from streptozotocin (STZ)-induced type 1 diabetic rats ('diabetic ADSCs'). Materials and methods: Diabetic ADSCs were treated with DFO and compared to normal and non-treated diabetic ADSCs for expression of HIF-1α, VEGF, FGF-2 and SDF-1, at mRNA and protein levels, using qRT-PCR, western blotting and ELISA assay. Activity of matrix metalloproteinases -2 and -9 were measured using a gelatin zymography assay. Angiogenic potential of conditioned media derived from normal, DFO-treated and non-treated diabetic ADSCs were determined by in vitro (in HUVECs) and in vivo experiments including scratch assay, three-dimensional tube formation testing and surgical wound healing models. Results: DFO remarkably enhanced expression of noted genes by mRNA and protein levels and restored activity of matrix metalloproteinases -2 and -9. Compromised angiogenic potential of conditioned medium derived from diabetic ADSCs was restored by DFO both in vitro and in vivo experiments. Conclusion: DFO preconditioning restored neovascularization potential of ADSCs derived from diabetic rats by affecting the HIF-1α pathway. © 2015 John Wiley & Sons Ltd

Kenaf Fibre Composites As Promising Green-Composites For Automotive Car Door Map Pocket Application

The utilisation of natural fibres in composite materials is expanding because of an enactment that constrains automotive makers to reuse and recycle materials,leading to an increase in bio-based materials substances in automotive applications.An experimental investigation was conducted to explore car door map pocket for PROTON Saga FL by using non-woven kenaf (N-W)and hybrid from non- oven/ woven fabric kenaf (HN-W/W).The Hand Lay-up Method followed by vacuum bagging process were used.The results revealed that L2 HN-W/W was the reasonable sample for car door map pocket due to its light weight,good tensile strength and flexural strength as compared to PP.It was also found that the tensile strength and flexural strength were improved by utilising woven kenaf fabric in composites.Result implications and future research directions were also presented

THE 'FITTED’ MANAGEMENT FOR HUMAN CAPITAL DEVELOPMENT IN PUBLIC SECTOR

The success of economic and social development depends on the public sector competency, good governance, and functions. However, the reality in most developing countries which embeds a centralized policy in public services, this becomes a barrier for an effective provision of public services towards global competition. This relates closely to people and organization development in public institutions. The purpose of this paper is to review challenges faced by public sector and to seek solutions based on the concept of integration, implementation, and performance measurement of their business. The proposed conceptual framework is Fitted Management, where the exploration of the organization processing capabilities and how to manage it (to be consistent with the globalization). This will be based on the premise of what constitutes a customer value in the public sector by improving the ability of employees and organizations