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Search Results: 1 - 10 of 1687 matches for " Wai Shiang Cheah "
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FOTool: Modelling Indigenous Community Cultures in Sarawak  [PDF]
Edwin Mit, Ng Bong Ding, Cheah Wai Shiang
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.78067

Formal-Object Tool (FOTool) is a software modelling approach that integrates formal specification and object oriented model. FOTool integrates the rigour of formal methods and the ease of use of OO techniques. The idea of FOTool is to provide an easy interface by allowing the application developer to develop the software model by using the object-models, while the verification of the models is carried out by using formal models. Before the verification process, the object static and dynamic models need to be transformed into formal models based on the transformation rules defined in FOTool. This paper presents the FOTool architecture, the transformation rules from object to formal models, and discusses the application of FOTool in our continuous research in modeling, the indigenous communities’ knowledge in Sarawak, and also the challenges of modelling the complex cultural, taboos and beliefs of indigenous communities. The knowledge is generated from the heterogeneous cultural, taboos and beliefs of various ethnic groups in Sarawak. The traditional knowledge is then mapped to a logical explanation in relation to modern life style.

Designing a Shared Single Display Education Application through Interactive Patterns  [PDF]
Wai Shiang Cheah, Edwin Mit, Marlene Valeri AiSiok Marlene Valeri AiSiok Lu
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.713095
Abstract: Interactive patterns are able to promote the notion of reusability in groupware application development. Hence, these patterns support the comprehensiveness of both the interaction design and implementation while easing code modification for groupware application. Groupware is used to describe a broad range of technologies that support person-to-person collaboration. How to design and develop a groupware in an effective manner remains a research question worth exploring. This paper introduces a reusable method, patterns, to develop a single shared display application. Nine different interactive patterns that allow participants to interact collaboratively or non-collaboratively in a single shared display application are introduced in this paper. This is followed by the presentation of our quantitative results on the usability of the interactive patterns and the reusability of the patterns in designing and maintaining a single shared display application. From the results, not only are the patterns useful and easy to understand, the patterns actually ease the process of designing and maintenance during the application development under a single shared display.
The Effect of Perforation on the Dynamics of a Flexible Panel
A. Putra,Y. M. Cheah,N. Muhammad,A. Rivai,C. M. Wai
Advances in Acoustics and Vibration , 2014, DOI: 10.1155/2014/526045
Abstract: Introduction of holes into plate-like structures is commonly found as one of the practical noise control measures to reduce sound radiation. However, perforation also reduces the panel stiffness and hence increases its vibration. The discussion on this effect is lacking and hence this paper discusses the dynamics of a perforated panel from the results obtained from Finite Element (FE) model. Different hole geometries and arrangement are simulated to investigate their effect on the plate mobility. In general, it is found that increasing the perforation ratio increases the plate mobility. For a fixed perforation ratio, the mobility increases at high frequency (above 1?kHz) for a smaller hole density in the plate. The plate with holes concentrated at the middle shows the largest increase of vibration around the plate centre compared to those uniformly distributed or away from the middle and concentrated at the plate edges. This is because as the hole separation becomes smaller, the reduction of the global stiffness around the mid area of the plate becomes greater. This also corresponds to the finding here that the mobility is greater at the vicinity of the hole. Different conditions of the plate edges are found to give consistent trend of the effect of perforation. 1. Introduction The vibration of engineering structures, particularly those consisting of thin plate-like members, can be a significant source of noise in many situations. It is common in noise control technique to reduce the sound radiation of such structures directly by constructing them from perforates. This technique is known to be capable of reducing considerable noise radiation and has found many practical applications, including safety guard enclosures over flywheels and producing collection hoppers. However, the effect of perforation on the plate dynamics is rarely discussed, at least in terms of change in the vibration level due to perforation. The recent models [1, 2] to calculate the sound radiation from a perforated panel also ignore this effect. The investigation of the effect of perforation on dynamic properties of plates began in the early 1960s in order to determine an accurate stress analysis of perforated panels used to support the tubes in a heat exchanger [3, 4]. To obtain equivalence with the actual properties corresponding to a solid plate, the effective material properties were defined, namely, effective Young’s modulus, effective Poisson’s ratio, and effective density. Soler and Hill [5] later proposed an analytical formula to calculate the bending stiffness of a
Functions of essential nutrition for high quality spermatogenesis  [PDF]
Yunsang Cheah, Wanxi Yang
Advances in Bioscience and Biotechnology (ABB) , 2011, DOI: 10.4236/abb.2011.24029
Abstract: The process of sperm production is well understood, but the studies of essential nutritional elements which are necessary for successful spermatogenesis are not deeply studied as yet. Our review focuses on integrating available information of various nutritional elements involved in spermatogenesis, sperm maturation and male reproductive system development, such as Zinc, Selenium, Folate, Vitamins and others. Antioxidants protect sperm from further oxidative damage during the entire sperm production. Other nutrients assist to improve sperm quality through different ways. The important roles of macronutrients like lipids, amino acids and proteins are emphasized here. These macronutrients constitute major components of the spermatozoa. Effects of nutritional elements on the development of Sertoli cells and Leydig cells, sperm motility and semen quality, capacity of capacitation and fertilization are discussed. A review of these areas will provide researchers with a better understanding of the compulsory participation of these nutrients in male reproductive processes. This review also pointed out gaps in current studies which will require further investigations.
Symmetry selective third harmonic generation from plasmonic metacrystals
Shumei Chen,Guixin Li,Franziska Zeuner,Wing Han Wong,Edwin Yue Bun Pun,Thomas Zentgraf,Kok Wai Cheah,Shuang Zhang
Physics , 2014, DOI: 10.1103/PhysRevLett.113.033901
Abstract: Nonlinear processes are often governed by selection rules imposed by the symmetries of the molecular configurations. The most well-known examples include the role of mirror symmetry breaking for the generation of even harmonics, and the selection rule related to the rotation symmetry in harmonic generation for fundamental beams with circular polarizations. While the role of mirror symmetry breaking in second harmonic generation has been extensively studied in plasmonic systems, the investigation on selection rules pertaining to circular polarization states of harmonic generation has been limited to crystals, i.e. symmetries at the atomic level. Here we demonstrate the rotational symmetry dependent third harmonic generation from nonlinear plasmonic metacrystals. We show that the selection rule can be imposed by the rotational symmetry of meta-crystals embedded into an isotropic organic nonlinear thin film. The results presented here may open new avenues for designing symmetry-dependent nonlinear optical responses with tailored plasmonic nanostructures.
Integrate now, create health
Jason Cheah
International Journal of Integrated Care , 2011,
Assessing Criminal Justice and Human Rights Models in the Fight Against Sex Trafficking: A Case Study of the ASEAN Region
Cheah Wuiling
Essex Human Rights Review , 2006,
Abstract: This article focuses on how the responses of the States within the Association of Southeast Asian Nations (hereinafter ASEAN) to combating sex trafficking, or trafficking for the purposes of forced prostitution, have evolved over time. In doing so it assesses the effectiveness of these frameworks in addressing the plight of trafficked victims and breaking the vicious cycle of trafficking. Part 2 gives a brief overview of the various criminal law, human rights and multidisciplinary frameworks developed by the international community against sex trafficking. Particular focus is given to the 2000 Protocol to Prevent, Suppress and Punish Trafficking in Persons Especially Women and Children, supplementing the United Nations Convention against Transnational Organized Crime (hereinafter the 2000 Palermo Protocol against Trafficking) which has a multidisciplinary and victim-centred approach that reflects a change in the international community’s understanding of sex trafficking, not only as a crime, but as a violation of victims’ rights and whose complex push and pull factors necessitate a multidisciplinary approach. Part 3 then examines ASEAN’s approach to combatting sex trafficking, focusing in particular on how the dominant criminal law approach adopted by ASEAN does not adequately protect trafficked victims, nor does it effectively break the cycle of trafficking. Parts 4, 5 and 6 outline and assess the anti-trafficking strategies developed in Malaysia, a country which has in the past fought sex trafficking via a strict criminal law model, and the Philippines, a country which in the past sought to suppress trafficking pursuant to a labour migration framework. It describes how these countries have, in line with international developments, moved towards adopting a more multidisciplinary and victim-centred approach towards combatting sex trafficking.
Action of Intertwining operators on pseudospherical K-types
Shiang Tang
Mathematics , 2015,
Abstract: In this paper, we give a concrete description of the two-fold cover of a simply connected, split real reductive group and its maximal compact subgroup as Chevalley groups. We define a representation of the maximal compact subgroup called pseudospherical representation, it appears with multiplicity one in the principal series representation. We introduce a family of canonically defined intertwining operators and compute the action of them on pseudospherical K-types, obtaining explicit formulas of the Harish-Chandra c-function.
Enterprise Mobile Tracking and Reminder System: MAE
Cheah Huei Yoong
International Journal of Interactive Mobile Technologies (iJIM) , 2012, DOI: 10.3991/ijim.v6i3.2096
Abstract: Mobile phones have made significant improvements from providing voice communications to advanced features such as camera, GPS, Wi-Fi, SMS, voice recognition, Internet surfing, and touch screen. This paper presents an enterprise mobile tracking and reminder system (MAE) that enables the elderly to have a better elder-care experience. The high-level architecture and major software algorithms especially the tracking in Android phones and SMS functions in server are described. The analysis of data captured and performance study of the server are discussed. In order to show the effectiveness of MAE, a pilot test was carried out with a retirement village in Singapore and the feedback from the elderly was evaluated. Generally, most comments received from the elderly were positive.
Understanding of the Fate of Atmospheric Pollutants Using a Process Analysis Tool in a 3-D Regional Air Quality Model at a Fine Grid Scale  [PDF]
Yang Zhang, Shiang-Yuh Wu
Atmospheric and Climate Sciences (ACS) , 2013, DOI: 10.4236/acs.2013.31004
Abstract: The process analysis is performed for August and December, 2002 using the process analysis tool embedded in the Community Multiscale Air Quality (CMAQ) modeling system at a fine horizontal grid resolution of 4-km over an area in the southeastern U.S. that is centered at North Carolina. The objectives are to qunatify the contributions of major atmospheric processes to the formation of major air pollutants and provide the insights into photochemistry that governs the fate of these pollutants at a fine grid scale. The results show that emissions provide a dominant source for gases including ammonia (NH3), nitric oxide (NO), nitrogen dioxide (NO2), and sulfur dioxide (SO2) and Particulate Matter (PM) species including fine PM (PM2.5) and its composition such as sulfate, elemental carbon, primary organic aerosol, and other inorganic fine PM in both months. While transport acts as a major sink for NH3, NO, and SO2 at most sites and PM2.5 and most of PM2.5 composition at urban sites, it provides a major source for nitric acid (HNO3) and ozone (O3) at most sites in both months, and secondary PM species in August and most PM species in December at rural and remote sites. Gas-phase chemistry serves as a source for NO2 and HNO3 but a sink for O3 at urban and suburban sites and for NO and SO2 at all sites. PM processes contribute to the formation of PM2.5 and nitrate () at the urban and suburban sites and secondary organic aerosol (SOA) at most sites in December and ammonium () in both months. They reduce formation at most sites in August and at rural and remote sites in December and the formation of PM2.5 and SOA at most sites in August. Dry deposition is an important sink for all these species in both months. The total odd oxygen (Ox) production and the total hydroxyl radical (OH) reacted are much higher at urban and suburban sites than at rural sites. Significant amounts of OH are consumed by biogenic volatile organic compounds (BVOCs) in the rural and remote areas and a combination of anthropogenic VOCs (AVOCs) and BVOCs in urban and subareas areas in August and mainly by AVOCs in
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