Design on switching sequence for control circuit by using Altera Max+Plus II

The purpose of this research work is to design digital switching sequence for control circuit. A digital system comes with more benefit than analog which is programmable, faster, precise and flexible. These proposed digital switching sequences are application for single-phase and three-phase inverters. By controlling analog circuits digitally, system cost and power consumption can be drastically reduced. The switching sequences are designed using Altera Max+Plus II and downloaded to University Program (UP1) development board unit which consists of two types of Complex Programming Logic Devices (CPLD). In this research work, MAX7000 has been chosen to download the proposed switching sequence that has been designed. To prove the validity of the switching sequences chosen for single-phase and three-phase inverter, MATLAB/ Simulink is used as the simulation software. At the end of this research work, the digital switching sequences for single-phase and three-phase inverter have successfully been designed

Small and high-temperature electrical machine for vehicle applications

PhD ThesisInterior permanent magnet (IPM) motors are a very promising design alternative in comparison with other types of electrical motors. Even though the price of rare-earth magnets has become a severe concern, IPM motors are gaining increasing attention due to their high torque density and excellent field weakening performance. Therefore, researchers have attempted to reduce the use of magnet materials but, at the same time, maintain the output performance of IPM motors. One solution is to reduce the size of the machine, which will also reduce the amounts of all materials used. Generally, a small scale is a profound advantage. Still, it may constitute a deficiency from the thermal point of view by contributing to higher loss density and problems operating at a higher temperature. An IPM motor may fail due to winding failure or the demagnetization of permanent magnets. It is crucial to make sure that these motors can run safely. The purpose of this study is to develop a new electrical machine for automotive applications that is smaller in size with minimised use of magnets and which meets all requirements. The focus is on design alterations to reduce the size of the motor. Furthermore, high-temperature materials are used to ensure that the motor can work safely, even in hotter conditions. A comparison is conducted on the performance of different sizes of the motor using finite element analysis in attempting to reduce the usage of the magnet material. Then, the temperature and heat transfer exposure of IPM motors are predicted by applying thermal modelling. Research is also conducted to find the most suitable material for smaller IPM motors to run at higher temperatures. Besides using neodymium-iron-boron as magnet material for an existing IPM motor, this study also analyses an IPM motor with samarium-cobalt, which has advantages in terms of higher temperature operation. The characteristics of IPM motors equipped with distributed and concentrated winding for automotive applications are also considered, and a proper motor winding is proposed. Two prototype IPM motors with different sizes and magnet materials are built and tested to validate the finite element analysis results. The first machine is developed using the same materials as in the existing Nissan Leaf machine, while the second is designed using high-temperature materials. The most suitable size of a smaller IPM motor is ultimately determined, which can reduce the usage of permanent magnet and other material, but which maintains the output performance of existing IPM motors. The design allows significant weight and size reductions in comparison with existing PM motors due to the use of high-temperature materials, which makes this electrical motor the right candidate for traction drive applications. The motor also satisfies all safety requirements

The integration of work ethics and technology acceptance towards enhancing online learning environment among lecturers

The adoption of online learning environment has become one of the major concerns in education industry due to the advancement of technology. Even though institutions and organizations had invested huge amount to ensure the online learning platform can be beneficial towards lecturers and other users, however, the progress in solving the issue remained sluggish. Nevertheless, the existing models and theory pertaining to intention and behavior towards adopting online learning is not sufficiently taken into account in the current studies. In this essence, work ethics are important as a guideline to proper everyday professional life which assists employees to grow professional codes of ethics that define professional standards for conduct. Hence, workers possessing a great work ethic have instilled principles that steer the way they behave at workplace. Considering this, this paper aims to form a model integration of work ethics acts as an antecedent of performance expectancy, effort expectancy, social influence, and facilitating conditions in the UTAUT model which can lead towards the intention of adopting online learning environment. The proposed concept would develop theoretical framework based on integration model. Hence, this study will produce a new theoretical framework model that integrate work ethics with UTAUT for enhancing online learning approach among lecturers using technology and will contribute towards preparing future learning environment that equip with technology advancement and crafting training and development of online learning environment in line Industrial Revolution 4.0 in Malaysia

Characteristics and success factors of rural community leadership in Malaysia: a focus group analysis

The leadership aspects of rural leaders in Malaysia are still unclear, and a consensus of the characteristics of credible rural community leaders has not been achieved. In addition, there is still a lack of specific and in-depth research on community leadership in rural areas in Malaysia. Therefore, a study was conducted to deepen understanding of leadership, specifically in the rural community leadership characteristics and success factors. The current study used a qualitative approach via a focus group discussion method involving 15 informants from the Village Development and Security Committee (JPKK) to gain in-depth information. The major themes that emerged from findings include inborn leadership, leadership quality, leadership characteristics, leadership motivation, and leadership training, referred to as leaders’ success factors. The current study hopes that the government can provide focused and comprehensive leadership training programs to ensure leaders perform their duties effectively and efficiently

Modal Insan Cemerlang- Minda Kelas Pertama: Suatu Perspektif

KPM memperkenalkan Pelan Induk Pembangunan Pendidikan 2006-2010 yand dibina berasaskan enam teras strategik dengan matlamat spesifik: membina negara bangsa, membangunkan modal insan, memperkasakan sekolah kebangsaan, merapatkan jurang pendidikan, memartabatkan profesion keguruan dan melonjakkan kecemerlangan institusi pendidikan. Buku ini mengupas isi-isi penting berkaitan enam teras tersebut

Design on switching sequence for control circuit by using altera MAX+PLUS II

The purpose of this research work is to design digital switching sequence for control circuit. A digital system comes with more benefit than analog which is programmable, faster, precise and flexible. These proposed digital switching sequences are application for single-phase and three-phase inverters. By controlling analog circuits digitally, system cost and power consumption can be drastically reduced. The switching sequences are designed using Altera Max+Plus II and downloaded to University Program (UP1) development board unit which consists of two types of Complex Programming Logic Devices (CPLD). In this research work, MAX7000 has been chosen to download the proposed switching sequence that has been designed. To prove the validity of the switching sequences chosen for single-phase and three-phase inverter, MATLAB/ Simulink is used as the simulation software. At the end of this research work, the digital switching sequences for single-phase and three-phase inverter have successfully been designed

Ambient air quality monitoring of particulate matter in around waste facilities

The experiment is undertaken to determine the particulate matter concentration in a landfill Jerangau-Jabor., Kuantan Pahang. Air pollution associated with the atmospheric particulate matter has diverse effect ranging from human health to visibility and climate forcing. Operating municipal solid waste (MSW) landfills emit a variety of air pollutants, among them particulate matter (PM) and landfill gas. Much attention has been given to landfill gas emission due to their climatic impact and their potential for energy production. However, particulate matter (PM) has also important effects on local air pollution and human health. The concentration of particulate matter has been taken for 8hours and comparison at 3 different location of landfill also has been performed. The PM measurement in the landfill was performed using a Direct sense monitoring kit model TG 501 which is a portable and battery operate. Base on the experiment testing that has been done; it is shown that the data display data logging was successfully recorded. After the particulate matter measured had been done, data from the probe is gained through iPAQ hx2700 Series Pocket PC, data mass of particulate matter is gained through PC software. The average concentration of particulate matter at the landfill site range 519.41μg/m3 –942.54 μg/m3. The higher concentration was observed at the point C (the disposal of domestic waste) because the type of municipal solid waste from a residential area, market and business area within 300-500 tonnes/day

Factors Determining Academics’ Behavioral Intention and Usage Behavior towards Online Teaching Technologies during Covid-19: An Extension of the UTAUT

Faced with lockdowns and social isolation because of COVID-19, alternative teaching methods such as online teaching allow academics and lecturers to teach students. Hence, the study aimed to investigate academics’ intention and behavioral patterns in adopting online educational technologies in Malaysia via the unified theory of acceptance and the use of technology (UTAUT) with an additional academics’ ethical considerations. The data were collected randomly from a sample of 321 academics from five Malaysian research universities using a questionnaire. For model and hypothesis testing, partial least squares (PLS) regression was utilized. The findings revealed that (1) ease of use, social influence, and ethical considerations all influenced behavioral intention significantly; and (2) facilitating conditions had positive relationships with usage behavior. The present results are consistent with the original UTAUT model and ethical considerations as an additional factor. The study findings serve as a beneficial guide for universities and educational planners who are programming online teaching technologies for use in universities