Quality of services through public perception at Community Polyclinic, Peringgit, Melaka / Diyana Iskandar Zurkarnain and Nurazlin Ahmad

Service quality is the perception that results from comparing expectation with the experience. It also become as the function of both process and outcomes. The service quality is a attitude formed by long-term evaluation of performance. There are five dimensions or factors that involved in service quality which is tangible, reliability, assurance, empathy and also responsiveness. All the factors have their own important roles towards the perception from the public. The study is made to identify the quality service through public perception at Community Polyclinic, Peringgit, Melaka. 110 respondents were taken which are the patients that came to Community Polyclinic, Peringgit, Melaka to seek for treatment. In Community Polyclinic, Peringgit, Melaka the number of patients that come per day are almost 1000 patients. This is based on the interview from the staff at the polyclinic itself. The most factor that affected to the public perception is empathy where it is based on the staff willingness in order to help the patients in terms of give feedback, give accurate information and also greet them. The instinct behaviors like obedience, loyalty and also advocacy participate in the service quality. The quality service become as the important component in deciding the perception from the public

Improved direct torque control load torque estimator with the influence of steering angle for dual induction motors electric vehicle traction drive system

Front-wheel direct-driven dual motors of an electric vehicle (EV) with a single controller configuration offer great potential and flexibility for improving system performance, efficiency and safety. The objective of the paper is to design a new load torque estimator of Direct Torque Control (DTC) by merging the electrical model with the mechanical model of an EV traction system to improve the dual motors single controller configuration. The electrical model utilise Space Vector PWM (SVPWM) DTC control of dual induction motors fed Five-leg Inverter (FLI) while the mechanical model takes the 14DOF vehicle dynamic model as its main structure. The new technique used is by integrating lateral force with longitudinal force produced at the touch point of a tyre with road surface as the input to the new load torque estimator of DTC. The new load torque estimator technique results were, then, compared with the standard load torque estimator that used the voltage and current feedback only. The findings showed that while torque estimator of conventional DTC had no effect of steering angle on the speed, torque and current performance of the motors, the new load torque estimator showed a significant impact. The speed, torque and current responds of the motors now have precisely been estimated; following the trajectory of the steering angle. Hence, for future research the new load torque estimator with the accurate and precise speed and torque response can further be utilized in stability, slip and skid and traction control or even for electronic braking system

Earth isn’t flat

Earth Isn’t Flat is an informative website that implements a 3D interactive earth globe for travelers and tourists, aimed to provide them with a wonderful experience in learning and exploring countries around the world. This project also provides options for graphic modes to the user, a 3D earth model and an anaglyph/stereoscopic model to explore the website from different views. From this, users no longer need to visit different websites and pages anymore to gain information about their destination. Plus, they could experience amazing trip planning and avoid clashes of information, as well as inaccurate planning or cultural faux pas

Geological, geoarchaeological, biological, and historical heritage of Lenggong geopark development

The Lenggong Valley is uniquely significant in national and international geological heritage and was declared a UNESCO Archaeological Heritage Site in 2012. The Lenggong Valley was formed 550 million years ago. It is one of the oldest in Peninsular Malaysia, equivalent to the rock formations in Langkawi and Jerai. The geological evolution in the Lenggong Valley also produced biodiversity and the history of early human prehistoric to the present time. Due to this privilege, the Lenggong Geopark nomination development effort started in 2020 by forming the Geopark Promotion and Development Committee. Lenggong Geopark covers an area of 2,068 km2 (enclosed by the boundaries of the Lenggong Parliament). A total of 27 geosites have been identified, depicting four important geological and historical tectonic evolutions and special geomorphic features in the Lenggong Valley. Eight biosites are still preserved, involving granite mountain, limestone, and lowland ecosystems covered by different forest types. It is the limestone hills that contain a large number of rare and endemic flora species. In addition, eight geoarchaeological sites were also identified that depicts the interaction between early humans and the geological landscape. The unique and preserved traditions of life, art and culture have added value to the geopark. Therefore, active efforts continue to be carried out in the development of geosites and programs with the local community to foster a high sense of pride and belonging to a place, in addition to an understanding of the preservation and conservation of natural and cultural heritage in Lenggong Geopark. Various activities based on tourism activities are also planned to stimulate the economy and introduce Lenggong as the second national geopark area in the State of Perak

Synthesis and characterization of sodium bismuth titanate (Na0.5Bi0.5TiO3) ceramic by sol-gel method at different sintering temperature

Sodium Bismuth Titanate is a prominent candidate for a lead-free piezoelectric material. In this research, Na0.5Bi0.5TiO3 was synthesized at different sintering temperature by sol-gel method in which the solutions were prepared by using sodium acetate CH3COONa, bismuth (III) acetate Bi(CH3COO)3, tetra-n-butyl titanate Ti(OC4H9)4, as starting materials. Acetic acid glacial and 2-methoxyethanol as solvents and acetylacetone as a reagent to stabilize tetra-n-butyl titanate. The obtained BNT powder was analyzed using XRD, FESEM, FTIR. The mechanical properties of BNT was determined by hardness testing to investigate the strength of the samples. Pellets have been formed and sintered at 940 oC, 960 oC, 980 oC, 1000 oC for 5 hours. The XRD analysis confirmed that the perovskite structure was obtained at each temperature.The effect of slightly different sintering temperature on the structural was studied in detail. FESEM analysis of pellets showed the well-developed grains having larger size at higher sintering temperature. Hardness analysis that was examined by using Rockwell hardness testing shows that hardness measurement increased as the sintering temperature increased due to the amount of strain or defect content in the compact powders

A review of extreme condition effects on solder joint reliability: Understanding failure mechanisms

Solder joint, crucial component in electronic systems, face significant challenges when exposed to extreme conditions during applications. The solder joint reliability involving microstructure and mechanical properties will be affected by extreme conditions. Understanding the behaviour of solder joints under extreme conditions is vital to determine the durability and reliability of solder joint. This review paper aims to comprehensively explore the underlying failure mechanism affecting solder joint reliability under extreme conditions. This study covers an in-depth analysis of effect extreme temperature, mechanical stress, and radiation conditions towards solder joint. Impact of each condition to the microstructure including solder matrix and intermetallic compound layer, and mechanical properties such as fatigue, shear strength, creep, and hardness was thoroughly discussed. The failure mechanisms were illustrated in graphical diagrams to ensure clarity and understanding. Furthermore, the paper highlighted mitigation strategies that enhancing solder joint reliability under challenging operating conditions. The findings offer valuable guidance for researchers, engineers, and practitioners involved in electronics, engineering, and related fields, fostering advancements in solder joint reliability and performance

Mechanical Properties of Thulium-doped Bismuth Borotellurite Glass via Nanoindentation for Lead-Free Radiation Shielding Application

Commercially, lead-based glasses are used in industry as transparent radiation shielding material due to their durability. However, lead toxicity could cause detrimental health issues to humans. Thus, in this study, a new composition of thulium-doped bismuth borotellurite glass was fabricated via melt-and-quench technique. The effect of bismuth oxide (Bi2O3) on the physical, structural, and mechanical properties of the glass was investigated. Glass with 0.25 mol% of Bi2O3 has the highest density. However, the oxygen packing density (OPD) of glass with 0.15 mol% of Bi2O3 is higher than 0.25 mol% of Bi2O3. This is due to a high number of non-bridging oxygen (NBOs) in 0.25 mol% of Bi2O3 glass structure. The bonds that are present in the glass structure were verified by Fourier Transform Infrared Spectroscopy (FTIR) analysis. Then, the mechanical properties were investigated by nanoindentation test with Berkovich indenter. Comparing the mechanical properties of indented glass samples, 0.15Bi glass projected the best mechanical durability since it provides the highest hardness and reduced elastic modulus value. Also, the low plastic work and optimal elastic work make 0.15Bi glass resilient to stress. Thus, the 0.15Bi glass is deemed as the best glass sample for high mechanical strength radiation shielding glass. This lead-free radiation shielding glass does not pose harmful effects to humans

Hardware development for zero crossing of a multilevel single phase rectifier chopper for plug-in electric car battery charger using a PIC microcontroller

This paper focuses on developing the hardware for a controller and of a zero crossing circuit for an electric car battery charger. A novel topology of a battery charger is studied and tested. A conventional rectifier has drawbacks in terms of harmonic currents. This paper describes a five-level single-phase rectifier associated with buck chopper with a control signal which draws a clean sinusoidal line current for the application in a plug-in battery charger. The MATLAB/Simulink results reveal that the proposed battery charger performance is better compared to the conventional method