1,721,890 research outputs found
HISTORY CREATED: LIM CHEE WEI WINS 2014 MASUM’S SPORTSMAN AWARD
Full text linkPENANG, 4 April 2015 National
karate exponent and 2014 Asian Games gold medallist Lim Chee Wei
created history by becoming the first Universiti Sains Malaysia (USM) student to be crowned the
Malaysian Universities Sports Council (MASUM) Sportsman for 2014
Investigation of copper vapour and argon ion laser markings on film substrate / Foo Chee Wei.
Full text linkIllocutionary acts and adversarial questioning in post-match interviews / Stippie Chee Wei How
Full text linkThe advancement of journalism technology has seen the introduction of
broadcast interviews, which often feature unscripted questioning and answering
between journalists and interviewees. Over the years, studies of adverseness in
interviews have been focusing mostly on political interviews, with other types of
interview such as entertainment and sports explored limitedly. This study aims to
investigate the effects of match outcome on what kind of illocutionary acts and how
they are used by Jose Mourinho, as well as the adverseness used in the journalists’
questioning and how they are used against Jose Mourinho by adopting Searle’s
Classification of Illocutionary Acts (1976) and Clayman’s Question Analysis System
(2002) as analytical frameworks. Classification of Jose Mourinho’s utterances is based
on illocutionary point, direction of fit and psychological condition identification, while
adverseness in the interviewers’ questions is analysed by identifying the adverseness
indicators. The representative utterances were aimed at collecting the Portuguese
manager’s opinions of the match, which also explains why no declarations were used.
The use of directives in defeat/draw matches were used only to avoid certain questions
from having to be answered, while such directives were not needed when matches were
won. The use of suggestive questions by the interviewers shows their approach to
“obtain” answers when matches were won. However, questions were more hostile and
persistent with their follow-up questions when matches were lost/drawn. Finally, more
indirectness were found after matches were lost/drawn which shows the interviewers’
cautious approach to ask questions regarding refereeing decisions
The factors that motivate residential property investments in Klang Valley / Cheah Chee Wei
Full text linkInvestment in residential property has long been recognized as an important component in an individual’s portfolio of investment. Malaysia’s residential property price had seen the fastest surge in price for the last two years whereby property prices in Malaysia particularly in Klang valley had risen between 20 to 80 per cent. The sheer magnitude of increase in residential property prices has compelled individual property investors to commit a substantial amount of their funds to purchase residential property leaving little capital for other kinds of investment. The purpose of this research is to investigate the factors that influence and motivate individuals to invest in property in the Klang Valley. This study will attempt to understand the factors that motivate individual’s investment decision and as to why property investment is preferred as a wealth creation tool compared to other forms of investment products. This study also attempts to investigate whether or not investor’s gender and property features have significant influence on investor’s property investment decision
Internet financial reporting : an investigation of firm characteristics / Gan Chee Wei.
Full text linkContagion Source Detection in Epidemic and Infodemic Outbreaks: Mathematical Analysis and Network Algorithms
Full text linkThis monograph provides an overview of the mathematical theories and
computational algorithm design for contagion source detection in large
networks. By leveraging network centrality as a tool for statistical inference,
we can accurately identify the source of contagions, trace their spread, and
predict future trajectories. This approach provides fundamental insights into
surveillance capability and asymptotic behavior of contagion spreading in
networks. Mathematical theory and computational algorithms are vital to
understanding contagion dynamics, improving surveillance capabilities, and
developing effective strategies to prevent the spread of infectious diseases
and misinformation.Comment: Suggested Citation: Chee Wei Tan and Pei-Duo Yu (2023), "Contagion
Source Detection in Epidemic and Infodemic Outbreaks: Mathematical Analysis
and Network Algorithms", Foundations and Trends in Networking: Vol. 13: No.
2-3, pp 107-251. http://dx.doi.org/10.1561/130000006
Strain-tuning of periodic optical devices : tunable gratings and photonic crystals
Full text linkThesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.Includes bibliographical references (p. [161]-173).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.The advancement of micro- and nano-scale optical devices has heralded micromirrors, semiconductor micro- and nano-lasers, and photonic crystals, among many. Broadly defined with the field of microphotonics and microelectromechanical systems, these innovations have targeted applications in integrated photonic chips and optical telecommunications. To further advance the state-of-the-art, dynamically tunable devices are required not only for demand-based reconfiguration of the optical response, but also for compensation to external disturbances and tight device fabrication tolerances. In this thesis, specific implementations of strain-tunability in two photonic devices will be discussed: the fundamental diffractive grating element, and a photonic band gap microcavity waveguide. For the first part, we demonstrate high-resolution analog tunability in microscale diffractive optics. The design concept consists of a diffractive grating defined onto a piezoelectric-driven deformable membrane, microfabricated through a combination of surface and bulk micromachining. The grating is strain-tuned through actuation of high-quality thin-film piezoelectric actuators. Device characterization shows grating period tunability on the order of a nanometer, limited by measurement uncertainty and noise. The results are in good agreement with analytical theory and numerical models, and present immediate implications in research and industry. For the second part, we generalize the piezoelectric strain-tunable membrane platform for strain-tuning of a silicon photonic band gap microcavity waveguide. Additional motivation for this strain-tuning approach in silicon photonic crystals lies in:(cont.) (a) the virtual absence of electro-optic effects in silicon, and (b) the ability to achieve tuning with low power requirements through piezoelectric actuation. Compared to current thermo-optics methods, piezoelectric actuation affords faster and more localized tuning in high-density integrated optics. The small-strain perturbation on the optical resonance is analyzed through perturbation theory on unperturbed full 3D finite-difference time-domain numerical models. Device fabrication involves X-ray nanolithography and multi-scale integration of micro- and nano-fabrication methods. Experimental characterization achieved dynamically-tunable resonances with 1.54 nm tunable range (at 1.55 Mum optical wavelengths), in good agreement with theory. This is the first demonstration of strain tunability in photonic crystals and contributes to the development of smart micro- and nano-scale photonics.by Chee Wei Wong.Sc.D
Design, fabrication, experimentation and analysis of high-speed microscale gas bearings
Full text linkThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.Includes bibliographical references (p. [183]-190).Microengine Program. The all-silicon device consist of a free-rotating microturbine, with 4.2 mm rotor diameter, enclosed within a five wafer fusion-bonded stack. Of note are the low aspect ratio journal bearing and large journal bearing clearances, primarily limited by microfabrication, from which stable bearing operation must first be demonstrated as viable. Theoretical modeling of the gas-lubricated hydrostatic journal bearing presents design charts, a comparative study of existing predictions and investigation into rotational effects to consider the bearing stiffness during operation. Continued experimental refinements and exploration with our microfabricated rotor achieved rotational speeds up to 1.4 million rpm and peripheral speeds in excess of 300 m/s. Extensive experimental data is presented with analysis, focusing on whirl motion and its harmonic resonances as candidates for instability. Causes of ultimate failure is suggested with recommendations for further improvements. Moreover, in an effort to accomplish self-sustained microbearings, the axial thrust bearing is redesigned for a self-acting spiral groove bearing. The chosen constraint is to incorporate the hydrodynamic thrust bearing with minimal changes to the current device, whilst providing the required load and stiffness. Stability analysis and rarefaction considerations on the optimized design suggests an operating range for the bearing, leading to a hybrid design for ample stiffness during initial operation. The design is then developed into a microfabrication process flow and implemented successfully into the MicroBearing test devices. Experiments on a hybrid bearing were performed to gage the spiral grooves characteristics. A purely hydrodynamic aft thrust bearing device is then tested for operation through low speeds, although the effects of the spiral grooves could not be accurately determined. Finally, transition to a hydrodynamic operating mode for a hybrid bearing is demonstrated.by Chee Wei Wong.S.M
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