Kwang Loong Ng

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In the modeling of infectious disease spread within explicit social contact networks, previous studies have predominantly assumed that the effects of shifting social associations within groups are small. These models have utilized static approximations of contact networks. We examine this assumption by modeling disease spread within dynamic networks where(More)
BACKGROUND Patients with iron deficiency anaemia (IDA) are commonly referred to the gastroenterologists for exclusion of gastrointestinal (GI) pathologies. The British Society of Gastroenterology (BSG) has published a guideline for management of IDA. As recommended by this guideline, all patients should have examinations of both upper and lower GI tract(More)
In recent years many scholars are studying " happiness " seriously. Economics, long known as the dismal science, has a well established " utility theory " but utility should not be treated synonymously as happiness. This paper questions some premises of the Benthamite theory that presumes utility is the same as happiness and proposes a theory that there are(More)
Studies of intangible and of environmental assets have become key vehicles for the advancement of economists' understanding of capital. Each has features that diverge from those of " produced means of production ". The present paper addresses issues in capital accounting through an analysis based on an investment project. A project consists of various types(More)
  • Dinusha Dharmaratna, Jaai Parasnis, Kwang Ng
  • 2010
Water utilities in developing countries face a challenge in maintaining the existing supply and extending the supply of pipe-borne water to rural areas in face of growing demand. Understanding the cost structure is important for developing the pricing policies, regulating the market structure and ensuring the financial viability of the supply of pipe-borne(More)
This is a retrospective study of fourteen patients who had proven Cytomegalovirus (CMV) infection of the gastrointestinal tract with no Human Immunodeficiency virus infection. The median age was 60.5 (Range 28 to 81) years. Eight patients were below (Group 1) and six above sixty five years old (Group 2). Areas of gastro-intestinal involvement were:(More)
Measurement of capital is usually based on a set of specific assumptions. In recent years, studies of intangible and of environmental assets have become key vehicles for the advance of the theory and measurement of capital. Both have features that do not fit the assumptions. This paper begins by sorting out the limitations imposed by the narrow assumptions.(More)
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