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Search Results: 1 - 10 of 27319 matches for " Chai Zen Lee "
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Simulation of Power Flow and Protection of a Limited Bus Grid System with Injected Solar Power  [PDF]
Nader Barsoum, Chai Zen Lee
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.51008
Abstract:

In recent years, injection of renewable energy such as solar power into the power grid is increasing. However, inclusion of large-scale intermittent-type renewable energy requires better management in proper understanding of grid’s variable characteristics and its protection systems. In this paper, the investigation on overvoltage issue is illustrated. Overvoltage in distribution feeder occurs when large amount of solar power is injected at low power demand. Another investigation is on false operation of overcurrent relays due to reverse power to the 33 kV loads. The potential solutions to the two issues are illustrated in the small-sized power grid system using bi-directional inverters on AC buses in charging battery banks and adjusting the relay current settings. The benefits of solar power injection are illustrated whereby output power from generators is decreased and transmission losses are reduced. Electrical Transient Analysis Program (ETAP) was used for investigations.

A Review of Marketing Mix: 4Ps or More?
Chai Lee Goi
International Journal of Marketing Studies , 2009, DOI: 10.5539/ijms.v1n1p2
Abstract: The main objective of this study is to review the present marketing mix applies particularly to the marketing. Borden (1965) claims to be the first to have used the term marketing mix and that it was suggested to him by Culliton’s (1948). McCarthy (1964) offered marketing mix, often referred to as the 4Ps, as a means of translating marketing planning into practice (Bennett, 1997). Marketing mix is originating from the single P (price) of microeconomic theory (Chong, 2003). Number of researchers (eg. Gr nroos, 1994; Constantinides, 2002; Goi, 2005; M ller, 2006) explores more Ps instead of traditional 4Ps only currently applied in the market. However, the creation of new P seem like unstop. New Ps were introduced into the marketing scene in order to face up into a highly competitively charged environment (Low and Tan, 1995). Even, M ller (2006) presents an up-to-date picture of the current standing in the debate around the Mix as marketing paradigm and predominant marketing management tool by reviewing academic views from five marketing management sub-disciplines (consumer marketing, relationship marketing, services marketing, retail marketing and industrial marketing) and an emerging marketing (E-Commerce). The concept of 4Ps has been criticised by number of studies. Popovic (2006) criticised 4Ps as being a production-oriented definition of marketing, and not a customer-oriented. However, in spite of its deficiencies, the 4Ps remain a staple of the marketing mix. The subsequent Ps have yet to overcome a consensus about eligibility and agreement over the practical application (Kent and Brown, 2006).
Cyberculture: Impacts on Netizen
Chai Lee Goi
Asian Culture and History , 2009, DOI: 10.5539/ach.v1n2p140
Abstract: Macek (2004) highlighted a typology of current concepts of cyberculture. Four different concepts were identified, which are spans utopian, information, anthropological and epistemological concepts of cyberculture. Macek (2004) also highlighted four different periods of the cyberculture and its impacts on netizen. The very first foundations of cyberculture originate at the Massachusetts Institute of Technology (M.I.T.) at the turn of the 1950s and the 1960s. Early cyberculture reached its peak in the late 1970s and in the 1980s. Early cyberculture originates in the American hackers’ subcultures. The second period of cyberculture can be broadly set to the 1970s and the beginning of the 1980s. The beginning of the third period was characterised by a significant transformation at all the levels of early cyberculture, a shift that was related to the accelerated spread of microcomputers and to the development of public computer networks. This fourth period begins at the end of the 1980s and ends in about the middle of the 1990s.
Web Site Accessibility and Web Site Development in Malaysia
Chai Lee Goi
Journal of Applied Sciences , 2010,
Abstract: This study focuses on two parts. First part of the study is to identify the major problems of web site content in Malaysia using bobby web accessibility tool. The second objective is to study perception of marketers on web site development in Malaysia based on four factors (planning and preparation; development and design; management and maintenance and security, privacy and trust). The outcome of first part of this study found that number of web sites has achieved the bobby test is very low, which is 17.5%. The major errors of the web sites mainly are related to text, colour, animation, image, pixel and table. For the second part of study, even a test of web site development model is not a good-fit model, however, an overall of the study shows that all factors of web site development are important.
A Review of Existing Web site Models for E-Commerce
Chai Lee Goi
Journal of Internet Banking and Commerce , 2007,
Abstract: On reviewing the literature it became evident that previous researchers adopted a high-level approach to the development of Web site design models. The models were designed to be adapted to multiple industries resulting in broad categories. The literature has uncovered three main ways of classifying Web sites. The digital business model, e.g. Wen, Chen and Hwang (2001) and Schneider and Perry (2001) describe ways in which business can be conducted over the Web. The stages of development model, e.g. Ho (1997), Burgess and Cooper (1999), Boon, Hewett and Parker (2000), Lowe (2001), Becker (2002) and Davidson (2002) describes different stages of development with functionality mapped to each stage. In scoring systems, e.g. Elliot (2002), Cast Bobby (1999) and Gartner (2of a Web site are identified and given a score.
Factors Influence Development of E-Banking in Malaysia
Chai Lee Goi
Journal of Internet Banking and Commerce , 2006,
Abstract: There are several underlying forces coming together have caused theE-banking development in Malaysia. The development mainly because ofnew marketing strategy especially to create E-Customer RelationshipManagement (E-CRM) and to improve banking activities. The otherreasons are development of technology, applications and tools, as wellas supported by the government.
Marketing Mix: A Review of ‘P’
Chai Lee GOI
Journal of Internet Banking and Commerce , 2005,
Abstract: There has been a lot of debate in identifying the list of marketing mix elements. The traditional marketing mix by McCarthy (1964) has regrouped Borden’s (1965) 12 elements and has comprised to four elements of product, price, promotion and place. A number of researchers have additionally suggested adding ‘people, process and physical evidence decisions’ (Booms and Bitner, 1981; Fifield and Gilligan, 1996). The other suggested Ps are ‘personnel, physical assets and procedures’ (Lovelock, 1996; Goldsmith, 1999); ‘personalisation’ (Goldsmith, 1999); ‘publications’ (Melewar and Saunders, 2000); ‘partnerships’ (Reppel, 2003); ‘premium price, preference of company or product, portion of overall customer budget and permanence of overall relationship longevity’ (Arussy, 2005); and ‘2P+2C+3S formula’ (Otlacan, 2005), therefore personalisation, privacy, customer Service, community, site, security and sales promotion.
E-Banking in Malaysia: Opportunity and Challenges
Chai Lee Goi
Journal of Internet Banking and Commerce , 2005,
Abstract: E-banking has to be a delivery channel that replicates and replaces many of the physical functions a bank currently performs. Hence, the E-banking now becomes a virtual banking counter that the individual and corporate customer to carry out the regular activities. Even E-banking services more to electronic-based, but, it still strongly support banking activities, therefore communication, transaction and distribution (Peterson, Balasubramanian and Bronnenberg, 1997). There are number of challenges need to be faced by Malaysian banks, however, the opportunity in this industry is high due to the current trend especially application and development of ICT.
Direct Detection of the Biological Toxin in Acidic Environment by Electrochemical Impedimetric Immunosensor
Changhoon Chai,Jooyoung Lee,Paul Takhistov
Sensors , 2010, DOI: 10.3390/s101211414
Abstract: This study describes the direct detection of the biological toxin (Ricin) in acidic environment without pH adjustment by hydrophobically modified electrochemical impedance immunosensor (EII). The nano-porous aluminum substrate for EII was hydrophobically modified via self-assembled monolayer (SAM) of APTES. Biosensor for the detection of the Ricin was fabricated by the covalent cross-linking of antibody (Ab) with APTES-SAM. The immunoreactions between the immobilized Ab and the biological toxin in several diagnostic solutions were monitored by the electrochemical impedance spectroscopy (EIS) under the polarization of EII versus reference electrode. EII could detect the presence of the biological toxin in acidic foods in 20 mins without pH adjustment. The negatively charged ions including hydroxides would be adsorbed on the hydrophobic body of APTES-SAMs by the polarization during EIS analysis, and offset the effect of acids on the immunological activity of the immobilized Ab. It suggested that the adsorption of negatively charged ions helped to keep the immunological activities of the immobilized Ab on EII in acidic environment. Proposed mechanism of the localized pH adjustment that makes possible immunoreaction occurrence in low pH sample matrix is briefly discussed.
Graduates Employment: Valuable of Curtin University of Technology Sarawak Graduates
Chai Lee Goi,Christine Siik Hung Lau
International Journal of Marketing Studies , 2010, DOI: 10.5539/ijms.v2n1p127
Abstract: The main objective of this research is to study the valuable of Curtin University of Technology Sarawak’s graduates in 2006, as well as to study graduates’ perception and recommendation on programs offered. Questionnaires were distributed to School of Business and School of Engineering’s graduates before the Graduation Ceremony held on 11th May 2006 at the Imperial Hall, Mega Hotel. The study found that the employment rate is 64.9% in 2006. Unemployment rate dropped from 36% in 2004 to 25.3% in 2005 and then increased to 35.1% in 2006, however, from this unemployment group, it is found that 58.5% was ‘Still seeking for work’ scenario, while 32.3% took a break, 6.2% further studies, 1.5% choose not to work and 1.5% find difficult in getting a suitable job. The study also shows that around 69.17% of the Curtin’s graduate salary ranges are between RM1000 – RM1500 and RM1500 – RM1800. Related to graduates’ perception on the university, majority of students are very satisfied with the program offered by the school and even like to recommend their family members to study in this institution. However, number of recommendations was provided by the graduates to improve the quality of the programs. The program to be more relevant to the needs of the industry, especially industry training and practical work experiences, constant visitation to industry workplaces for better learning, applications towards theoretical components and increased contemporary knowledge currently practiced at the workplace to be brought into the classroom.
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