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- 검색키워드
- 저자 : Nakhon, Sarapan Na (검색결과 3 건)
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Green Assessment of Thailand’s Highway Infrastructure: A Green Growth Index Approach
Nakhon Kokkaew,Jittichai Rudjanakanoknad 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.7
Infrastructure investment is considered to be one of the crucial factors for promoting economic growth. In developing countries such as Thailand, government spending on economic infrastructure is critically important. However, promoting economic growth through infrastructure spending is not without consequences. For instance, a significant amount of carbon emissions was released by the construction and operation of roads in recent years. The aim of this paper is therefore to present a new model of green growth assessment for highway infrastructure that combines economic index with environmental performance of the project. Unlike its contemporary methods, the proposed Green Growth Index (GGI) accounts for the fact that the actual performance of a road project, both economic and environmental ones, may be different from what had been predicted. Accordingly, it may be of use to periodically evaluate the performance of the project in terms of its economic benefits and environmental impacts. A hypothetical road project is first used as a numerical example to illustrate how the proposed method can be applied. Then, a real highway project called Kanchanaphisek Road is then employed as a case study project presented in this paper.
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Completion Delay Risk Management: A Dynamic Risk Insurance Approach
Nakhon Kokkaew,Warit Wipulanusat 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.6
In the construction of an infrastructure project, completion delay is one of the major risks to the financial outlook of aninfrastructure project under construction. During the construction phase, if the project is delayed, project managers can take specificactions to shorten the duration of certain activities on the critical path in order to restore the project to its original schedule. However,not all management actions to shorten the duration of activities are cost-effective: the cost of reducing some activities’ duration mayexceed the savings. Risk that project managers cannot economically reduce through management feedback reactions should insteadbe transferred to third parties such as insurance companies that have risk pooling capacity. In this paper, we present a novel way ofmanaging completion delay risk through “dynamic risk insurance” by combining a technique known as the envelope method with astochastic-based Monte Carlo method. Two important features of this implementation of dynamic completion risk insurance are (1) astochastic risk premium between the contractor and the surety over the course of construction and (2) evolution of the risk premiumas a function of management feedback reaction. Finally, two illustrative examples, a BOT road and a commercial building,demonstrate how the proposed model may be applied in practice. The new model of dynamic risk insurance presented in this papermay improve risk management practice in large-scale construction projects that are loaded with uncertainty.
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Nakhon, Sarapan Na,Limvorapitux, Pawan,Vichinsartvichai, Patsama The Korean Society for Reproductive Medicine 2018 Clinical and Experimental Reproductive Medicine Vol.45 No.1
Objective: To survey knowledge about the factors that influence fertility in a reproductive-age population living in an urban area. Methods: A cross-sectional study was conducted using a questionnaire-based survey among both males and females aged 18-45 years living in the Bangkok metropolitan area. Results: The mean age of the participants was $26.8{\pm}7.2years$ (male, 41.9%; female, 58.1%). Of the participants, 53.1% had an undergraduate degree and 57.1% were single. Only one-fifth of the participants correctly identified the age when fecundity declines in male and female, the definition of infertility, and the period during the menstrual cycle with the highest chance of pregnancy. Approximately three-fourths of the participants correctly identified that cigarette smoking, alcohol consumption, and sexually transmitted infections affect fertility. Conclusion: A considerable knowledge gap about the factors that influence fertility was identified in reproductive-age individuals in an urban area of Thailand. This issue should be urgently addressed by promoting fertility awareness through education, discussions about social perceptions regarding fertility, and reliable sources of knowledge.
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