• Proceedings of the Technology Innovation Conference
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• 1996.12a
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• pp.179-195
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• 1996

With current. difficulties in Korean agricultural sector, the biotecilnoiogy is considered as the most important factor to offset the inferiority in the agriculture. New products by using the biotechnology would be commercialized and consumed by both producers and consumers. Before its production and distribution researches on new product should be undertaken in many aspects, especially in terms of economic aspects. Main objectives of this study are to measure the economic value of the new product using the agro-biotechnology, here potato microtubers, and to examine whether the stated preferences theory, the Contingent Valuation Method(CVM), could be accepted in the economic analysis for the new biotech product. Through the demand function derived from the consequences of functional relationship, the consumer's surplus was estimated.

• Nuclear Engineering and Technology
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• v.41 no.5
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• pp.561-574
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• 2009

First ex-vessel core catcher has been applied to the practical design of NPPs with VVER-1000 reactors built in China (Tyanvan) and India (Kudankulam) for severe accident management (SAM) and mitigation of SA consequences. The paper presents the concept and basic design of this crucible-type core catcher as well as an evaluation of its efficiency. The important role of oxidic sacrificial material is discussed. Insight into the behaviour of the molten pool, which forms in the catcher after core relocation from the reactor vessel, is provided. It is shown that heat loads on the water-cooled vessel walls are kept within acceptable limits and that the necessary margins for departure from nucleate boiling (DNB) and of vessel failure caused by thermo-mechanical stress are satisfactorily provided for.

• 한국논리학회:학술대회논문집
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• 2008.07a
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• pp.73-92
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• 2008

Describing a physical system in idealized terms involves making literally false claims about the system. Given this, it is puzzling that justified beliefs about physical systems can be formed by starting with idealized descriptions and then performing mathematical calculations. I argue that this puzzling aspect of idealizations cannot be easily removed by introducing talk of approximations. I go on to develop an account of how this curious feature of idealizations is to be understood. My account requires us to reassess what precisely we take the laws of physics to be saying, and also has consequences concerning the kind of evidence we can have for thinking that mathematics is the 'language of nature'. Finally, some critical comparisons are made with the so-called model-based account of scientific laws developed by Cartwright and Giere.

• The Bulletin of The Korean Astronomical Society
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• v.40 no.1
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• pp.48.3-48.3
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• 2015

Using numerical simulations, we study the effects of ram pressure stripping on dwarf galaxies. It is commonly assumed that ram pressure only affects the gas component of a galaxy. We find that it actually can affect the dynamics of the stars too, and even the dark matter surrounding the disk - an effect dubbed 'ram pressure drag'. We study the effects of ram pressure drag on tidal dwarf galaxies, and find the response is very strong. Tidal dwarfs may be entirely destroyed by gas removal, and their stellar dynamics may appear heavily dark matter dominated where no dark matter exists. We discuss the consequences for tidal dwarf evolution, tidal streams, and disk galaxy evolution in general.

• Korean Journal of Mathematics
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• v.6 no.2
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• pp.155-164
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• 1998

In this paper, the fuzzy $T_2$-axioms due to Hutton and Reilly, Ganguly and Saha and Sinha are characterized by using the notion of fuzzy closure. As consequences, we study the relation between the fuzzy $T_2$-axioms and give some examples which show that the axiom of fuzzy compactness, due to Ganguly and Saha, is not compatible with the fuzzy $T_2$-axioms.

• The Journal of Korean Academic Society of Nursing Education
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• v.20 no.2
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• pp.276-287
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• 2014

Purpose: The purpose of this study was to explore the clear concept of organizational commitment for effective nursing personnel management. Method: This study was conducted using Walker & Avant's conceptual analysis framework(2005). Results: Organizational commitment was identified with six attributes: acknowledgment, acceptance, trust, sacrifice, attachment, regulation. Antecedents of organizational commitment were personal characteristics, perceived organizational support, empowerment, fair compensation, job satisfaction, job autonomy, organizational culture, and leadership. Consequences of organizational commitment were turnover intention, job performance and organizational citizenship behavior. Conclusion: Organization commitment is a core concept for understanding the management of nursing personnel. Appropriate instruments to operationalize the concept of organizational commitment including six attributes need to be developed.

• Molecules and Cells
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• v.38 no.9
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• pp.750-758
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• 2015

Genomic instability and altered metabolism are key features of most cancers. Recent studies suggest that metabolic reprogramming is part of a systematic response to cellular DNA damage. Thus, defining the molecules that fine-tune metabolism in response to DNA damage will enhance our understanding of molecular mechanisms of tumorigenesis and have profound implications for the development of strategies for cancer therapy. Sirtuins have been established as critical regulators in cellular homeostasis and physiology. Here, we review the emerging data revealing a pivotal function of sirtuins in genome maintenance and cell metabolism, and highlight current advances about the phenotypic consequences of defects in these critical regulators in tumorigenesis. While many questions should be addressed about the regulation and context-dependent functions of sirtuins, it appears clear that sirtuins may provide a promising, exciting new avenue for cancer therapy.

• Korean Journal of Child Studies
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• v.29 no.5
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• pp.79-96
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• 2008

This study analyzed differences of role behaviors of participants in bullying according to bystanders' characteristics. Participants were 112 $5^{th}$, $6^{th}$ and $7^{th}$ grade students. Bystanders' characteristics of empathy, negative attitudes about bullying, psychological burden, distorting of consequences, and attribution of blame were classified by K-Means Cluster Analysis into three groups with similar characteristics : lack of empathy/cognitive distorting, anti-bullying, and perception of cost groups. Major findings were that : the lack of empathy/cognitive distorting group had higher levels of bullying behavior than the anti-bullying group and higher levels of victimization than the perception of cost group. The anti-bullying group showed higher levels of defense behavior than the lack of empathy/cognitive distorting group. Implications for future research were discussed.

• Communications of the Korean Mathematical Society
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• v.26 no.4
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• pp.557-573
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• 2011

The concept of the quasi-Armendariz property of rings properly contains Armendariz rings and semiprime rings. In this paper, we extend the quasi-Armendariz property for a polynomial ring to the skew polynomial ring, hence we call such ring a ${\sigma}$-quasi-Armendariz ring for a ring endomorphism ${\sigma}$, and investigate its structures, several extensions and related properties. In particular, we study the semiprimeness and the quasi-Armendariz property between a ring R and the skew polynomial ring R[x;${\sigma}$$] of R, and so these provide us with an opportunity to study quasi-Armendariz rings and semiprime rings in a general setting, and several known results follow as consequences of our results.

• Korean Journal of Adult Nursing
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• v.23 no.6
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• pp.527-542
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• 2011

Purpose: This paper is a report of an analysis of the concept of pro-environmental health behavior. Methods: Rodgers' method of evolutionary concept analysis was used to analyze the concept. A literature search using keywords 'pro-environmental health behavior, 'environmental health behavior', and 'eco-friendly health behavior' was conducted using PubMed, CINAHL, PsychINFO, and RISS and utilizing the results published from 1983 to 2011. Database and bibliographic searches yielded 84 records. Results: Four critical attributes of pro-environmental health behavior were identified as 'prevention and protection', 'internal process', 'altruism', and 'alternative'. Antecedents to pro-environmental health behavior were climate change, environmental pollution, and health risk. The consequences of pro-environmental health behavior were individual and social behavioral changes. Conclusion: The concept of pro-environmental health behavior developed in this project may offer information to be considered as the concept is further develop and efforts are made to measure the attributes of pro-environmental health behavior.