• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2646-2648
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• 2002

This paper deals with a comparative evaluation of the reliability of control rod drive mechanisms including their driving methods for nuclear power plants. Basically there exist two types of electromagnetic-jack-type drive mechanisms in commercial use that are called as Control Rod Drive Mechanism and Control Element Drive Mechanism. Each type has corresponding drive sequence to make the movements of insertion and withdrawal. A state-space model is derived for each model graphically. Then the evaluation of the reliability is carried out on the programming tool called SHARPE. The evaluation does not give any meaningful numerical values for the reliability but just shows a relative degree to each other in view of reliability.

• Ocean and Polar Research
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• v.44 no.4
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• pp.339-353
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• 2022

The purpose of this research is to conduct an empirical analysis regarding Korea's 'Marine Protected Areas (MPA)' from an international comparative perspective. The authors would like to present the policy direction of marine protected areas based on the result of the research. The result of this study can be summarized in the following manner: First, the total designated size of marine protected areas in Korea is very small compared to the sizes of other OECD nations . Second, while some nations have expanded the extent of marine protected areas in accordance with international agreements and criteria, Korea has not done so. Accordingly, we propose the designated dimensions of marine protected areas should be constantly expanded to keep pace with international trends.

• The Journal of Korean Medical History
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• v.27 no.2
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• pp.1-9
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• 2014

Objectives : Most academic societies have their own journals. Those journals represent the trends of academic societies' studies. Therefore, it is important to review articles in journals. Korean Society of Medical History (KSMH) has Journal of Korean Society of Medical History (J. of KSMH). We analyze articles in J. of KSMH and try to recognize the trends. Methods : From Vol. 12 No. 2 in 1999 to Vol. 27 No. 1 in 2014 of the J. of KSMH, we retrieved article's headings and analyzed those subjects. Results : We got 342 research articles about ; book 97, person 44, theory 65 (medical theory 48, thought 8, origin of word and story 9), clinical research 42 (disease 19, method 16, treatment 7), system of medicine and medical treatment 22 (system of medicine 10, system of medical treatment 12), mutual and comparative study in medicine 18 (mutual study 14, comparative study 4), etc. 56 (materia medica and prescription 23, trends study and essay 18, traditional medicine informatics 10, community medicine 5). Conclusions : J. of KSMH contained several subjects based on medical history ; book, person, theory, thought, origin of word and story, clinical research, mutual and comparative study in medicine, etc. However, the subjects were biased to books and persons.

• Journal of Information Technology Applications and Management
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• v.24 no.4
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• pp.25-39
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• 2017

This research conducted empirical and comparative study following interview concerning the relationship of acceptance attitudes and expected effects of the teleworking between Korean and Canada organizations. Independent variable was acceptance attitude, and the expected effect as dependent variable. Totally, 201 responded questionnaires (Korea : 118, Canada : 83) were analyzed for multiple regression and mean difference between groups. On January 1, 2015, Canada had agreed FTA (free trade agreement) with Korea. Therefore, many organizations can have opportunities for sharing hands in social infrastructures and business area. As a result, the research found out that teleworking can positively improve employee's quality of life, efficiency of works. Moreover, respondents informed us that it may give us national and social cost saving. The BYOD (bring your own device) will be helpful to make employees do more active communication. This comparative research expects that two countries have some insights to cooperate in smart work or teleworking. In addition, several Korean companies can have chances to export IT technologies to Canada market.

• IMMUNE NETWORK
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• v.14 no.6
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• pp.277-288
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• 2014

T cells are central players in the regulation of adaptive immunity and immune tolerance. In the periphery, T cell differentiation for maturation and effector function is regulated by a number of factors. Various factors such as antigens, co-stimulation signals, and cytokines regulate T cell differentiation into functionally specialized effector and regulatory T cells. Other factors such as nutrients, micronutrients, nuclear hormones and microbial products provide important environmental cues for T cell differentiation. A mounting body of evidence indicates that the microbial metabolites short-chain fatty acids (SCFAs) have profound effects on T cells and directly and indirectly regulate their differentiation. We review the current status of our understanding of SCFA functions in regulation of peripheral T cell activity and discuss their impact on tissue inflammation.

• Mycobiology
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• v.48 no.5
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• pp.373-382
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• 2020

Laccases (EC 1.10.3.2), a group of multi-copper oxidases (MCOs), play multiple biological functions and widely exist in many species. Fungal laccases have been extensively studied for their industrial applications, however, there was no database specially focused on fungal laccases. To provide a comparative genomics platform for fungal laccases, we have developed a comparative genomics platform for laccases and MCOs (http://laccase.riceblast.snu.ac. kr/). Based on protein domain profiles of characterized sequences, 3,571 laccases were predicted from 690 genomes including 253 fungi. The number of putative laccases and their properties exhibited dynamic distribution across the taxonomy. A total of 505 laccases from 68 genomes were selected and subjected to phylogenetic analysis. As a result, four clades comprised of nine subclades were phylogenetically grouped by their putative functions and analyzed at the sequence level. Our work would provide a workbench for putative laccases mainly focused on the fungal kingdom as well as a new perspective in the identification and classification of putative laccases and MCOs.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.17 no.1
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• pp.47-58
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• 2019

The paper presents the results of a multi-criteria comparative evaluation of 12 feasible Russian nuclear energy deployment scenarios with thermal and fast reactors in a closed nuclear fuel cycle. The comparative evaluation was performed based on 6 performance indicators and 5 different MCDA methods (Simple Scoring Model, MAVT / MAUT, AHP, TOPSIS, PROMETHEE) in accordance with the recommendations elaborated by the IAEA/INPRO section. It is shown that the use of different MCDA methods to compare the nuclear energy deployment scenarios, despite some differences in the rankings, leads to well-coordinated and similar results. Taking into account the uncertainties in the weights within a multi-attribute model, it was possible to rank the scenarios in the absence of information regarding the relative importance of performance indicators and determine the preference probability for a certain nuclear energy deployment scenario. Based on the results of the uncertainty/sensitivity analysis and additional analysis of alternatives as well as the whole set of graphical and attribute data, it was possible to identify the most promising nuclear energy deployment scenario under the assumptions made.

• The Journal of Economics, Marketing and Management
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• v.6 no.3
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• pp.1-9
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• 2018

Purpose - Current society is competitive society. Rules of the game is applied to every kind of aspects not only business but also academic matters. This research is to analyze competitiveness between China and USA by use of trade related data together with revealed comparative advantage index(RCA) including trade specialization index(TSI). Research design, data, methodology - Per economic phase, both China-USA have mutually complementary character. That's why it is significant to analyze this 2 country's important industry. From our economic viewpoint, Both 2 economic powers should cooperate to achieve partnership in the steel business industry under the severe business competition. Results - This paper will provide which country is more comparatively advantage in case international business is held. Especially, steel industry is in a sense technology related business. Therefore, tied-up up-to-date advanced know-how and technology should be developed to be a leader for one of major industries in the world market. Conclusion - Among those various phenomena, this paper categorizes international business and research boundary is international trade contract. It is available to find out how to cooperate securing permanent and reliable business provider and supplier is essential and eminent for the successful accomplishment in the world steel market.

• Journal of the Korean Academy of Clinical Electrophysiology
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• v.5 no.2
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• pp.95-105
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• 2007

The purpose of this study is to define the effect of taping and icing on muscle fatigue at knee joint of ordinary adult. The 30 adults meeting research standard were chosen to be observed. The period of the research was 9 days and N-K table was used as equipment to measure position sense of knee joint. Heart rate monitor was also used to measure heart beat during both when in comfortable state and in exercises. For the method of this study, error in position sense of knee joint was measured right before fatigue occurs. Then volunteers were to be exercised for 10 minutes in treadmill aiming to raise the heart beat to 90%. If muscle fatigue occurs after the exercise, let the comparative group rest for 20 minutes while applying taping for group 1 and icing for group 2. For the icing, it was applied for 3 minutes followed by 1 minute rest. 5 sets of icing were applied on thighs and calf each, Then error of position sense of knee joint was measured same way it was done before muscle fatigue. As the result, there were similar differences among comparative group(p<.05), group 1 and group 2 before the muscle fatigue and after the muscle fatigue. There were similar differences in comparative group with muscle fatigue, group 1 and group 2 as the result of one-way ANOVA and with further examination, similar differences were only found in between comparative group and group 2(p<.05). With the result, we can see there wasn't clear effect of rest, icing or taping, however, group 2 with icing showed better condition compared to comparative group who have rested without any application.

• Journal of Intelligence and Information Systems
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• v.12 no.4
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• pp.51-60
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• 2006

The goal of qualitative analysis is to capture and formalize qualitative and intuitive knowledge about physical world. Qualitative reasoning has been successfully applied to electric and mechanical mechanism domains, in which most of reasoning has focused on simulation. This paper introduces a qualitative comparative analysis technique which predicts how a change in a given situation propagates. We developed a comparative analysis technique which extends previous research by including a reasoning technique about the relative rate of the change of a parameter. Previous research focuses only on the relative change of a parameter. Causal model for the given situation is generated from qualitative domain model. The propagation by the change in causal relations are traced by applying our comparative analysis. By providing explanation as well as prediction for the given change, our technique is expected to be used in design, diagnosis, intelligent tutoring system, environmental evaluation.