117 research outputs found
Lee Kam Hing & Tan Chee-Beng (eds.), The Chinese in Malaysia
No full textLombard-Salmon Claudine. Lee Kam Hing & Tan Chee-Beng (eds.), The Chinese in Malaysia. In: Archipel, volume 61, 2001. pp. 202-203
The Defence of Ethnic Identity in Malaysia
No full textThe changing dynamics of interstate conflict in the post-Cold War environment led scholars to debate the relevance of established security theory. While traditionalists maintained that the state-centric theory should retain its primacy, others argued for a security agenda, not only broadened or widened to include other sectors, but one deepened or extended to include the individual and larger societal groupings as referent objects of security. In the 1990s, the Copenhagen Peace Research Institute developed a reformulated and expanded security agenda which recognized five dimensions of security – political, military, economic, environmental and societal. Societal security has been defined as the defence of identity with identity accepted as the way in which communities think about themselves and the manner in which individuals identify themselves as members of a particular community. The Institute’s research on societal security was further expanded by Paul Roe in his 2005 study on ethnic conflict in the Balkan states. The determination of successive Malaysian governments to inculcate Islamic values throughout its infrastructure and society was borne from the inter-communal violence in May 1969, a civil reaction to the unexpected election results. The loss of parliamentary majority, for so long the domain of the Malays, confirmed a significant shift in political power and the increasingly influential role of the non-Malay voice in the political process. The inter-ethnic hostility resulted in a Federation-wide state of emergency and the suspension of parliamentary democracy for 20 months during which time the country was led by the National Operations Council under the leadership of Tun Abdul Razak. The National Operations Council and subsequent administrations progressively introduced policy to restore Malay political supremacy and redress societal imbalance. Despite the obvious success of Malaysia’s social transformation, research has indicated that policy introduced to lessen the economic and social inequality of the Malays has, in effect, led to a polarising of ethnicities. Political historians and analysts are mindful that increasing ethnic tension along with tacit ethnic segregation are salient reminders of the violence of the 1969 ethnic riots. With the theoretical framework on societal security provided by the CPRI, this thesis proposes to analyse the impact of the post-1969 political paradigm on Malaysian society with particular focus on inter-societal relations
InGaAs/InAlAs single photon avalanche diode for 1550 nm photons.
No full textA single photon avalanche diode (SPAD) with an InGaAs absorption region, and an InAlAs avalanche region was designed and demonstrated to detect 1550 nm wavelength photons. The characterization included leakage current, dark count rate and single photon detection efficiency as functions of temperature from 210 to 294 K. The SPAD exhibited good temperature stability, with breakdown voltage dependence of approximately 45 mV K(-1). Operating at 210 K and in a gated mode, the SPAD achieved a photon detection probability of 26% at 1550 nm with a dark count rate of 1 × 10(8) Hz. The time response of the SPAD showed decreasing timing jitter (full width at half maximum) with increasing overbias voltage, with 70 ps being the smallest timing jitter measured
AN IMPROVED METHOD TO PREDICT ASPHALTIC AIRPORT PAVEMENT REPAIR HOURS: A CASE STUDY OF CHANGI AIRPORT
No full textPh.DDOCTOR OF PHILOSOPHY (CDE-BE
Engineering semiconductor nanowires for photodetection: from visible to terahertz
No full textIII–V semiconductor nanowires combine the properties of III–V materials with the unique advantages of the nanowire geometry, allowing efficient room temperature photodetection across a wide range of photon energies, from a few eV down to meV. For example, due to their nanoscale size, these show great promise as sub-wavelength terahertz (THz) detectors for near-field imaging or detecting elements within a highly integrated on-chip THz spectrometer. We discuss recent advances in engineering a number of sensitive photonic devices based on III–V nanowires, including InAs nanowires with tunable photoresponse, THz polarisers and THz detectors
Receiver system optimization for digital video broadcast (DVB)
No full textThis dissertation attempts to study the fundamentals of the function of the various Digital Television Broadcast protocols, with special focus on the widely adopted Digital Video Broadcast -Terrestrial (DVB-T), a European standard. DVB-T has been developed to provide robust and high capacity data streaming of video signal. It based on Coded Orthogonal Frequency Division Multiplexing (COFDM), strong encoding scheme for Forward Error Correction and special timing slots for signal synchronization, in the multi-path urban environment.Master of Science (Communications Engineering
Photodetector Fabrication by Dielectrophoretic Assembly of GaAs Nanowires Grown by a Two-steps Method
No full textGaAs nanowires (NWs) are promising advanced materials for the development of high performance photodetectors in the visible and infrared range. In this work, we optimize the epitaxial growth of GaAs NWs compared to conventional procedures, by introducing a novel two-steps growth method that exhibits an improvement of the resulting NW aspectratio and an enhancement of the NW growth rate. Moreover, we investigate the contactless manipulation of NWs using non-uniform electric fields to assemble a single GaAs NW on conductive electrodes, resulting in assembly yields above 90%/site and an alignment yields of around 95%. The electrical characteristics of the dielectrophoretic contact formed between the NW and the electrode have been measured, observing that the use of n-type Al-doped ZnO (AZO) as electrode material for NW alignment produces Schottky barrier contacts with the GaAs NW body. Moreover, our results show the fast fabrication of diodes with rectifying characteristics due to the formation of a low-resistance contact between the Ga catalytic droplet at the tip of the NW and the AZO electrode. The current-voltage measurements of a single GaAs NW diode under different illumination conditions show a strong light responsivity of the forward bias characteristic mainly produced by a change on the series resistance
Thin AlAsSb avalanche regions with sub-mV/K temperature coefficients of breakdown voltage and very low excess noise factors
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