• Proceedings of the KIEE Conference
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• 1989.11a
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• pp.313-316
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• 1989

A steady state analysis of a load commutated current source inverter which is widely used in high voltage - high power induction motor drive systems at present is presented and its related results are discussed. This analysis proposes a method by which we can determine the output capacitor playing a dominant role on the performance of the system. It is shown that the capacitance of output capacitors is mainly dependent on the range of frequencies that the inverter is operated in the load commutated state.

• Nuclear Medicine and Molecular Imaging
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• v.42 no.sup1
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• pp.116-120
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• 2008

Prostate cancer is the second leading cause of cancer death of men in western countries and the death related to this disease in Korea is also getting increased. Although anatomic imaging tools such as transrectal US or MRI have been playing a great role in detection of primary prostate lesion, the evaluation of regional lymph node or distant organ metastasis using these modalities is not successful. $^{18}F-FDG-PET$ scan is emerging diagnostic tool for various malignancies. Considering the usual characteristics of prostate cancer such as slow growing and osteoblastic metastasis, the application of FDG PET scan to this disease might be limited. However, in advanced prostate cancer refractory to chemotherapy, FDG PET scan show strong FDG uptake and SUV changes in serial PET scan can be a good indicator of treatment response. Although FDG PET can be useful only in limited cases of prostate cancer, its indication can be widened in future owing to rapid technical improvement and accumulated experiences in this field.

• The Journal of Korean Medicine
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• v.26 no.3 s.63
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• pp.55-65
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• 2005

Objectives : This study was carried out for the development of medicine for vitiligo treatment and focused on the effect of Psoraleae fructus extract on melanin synthesis of B16 melanoma cells. Methods : Activity of tyrosinase playing a vital role in the synthesis and quantity of melanin, which is the final product in cultured B16 melanoma cells, the effects of Psoraleae fructus extract were measured. Results : The results indicated that Psoraleae fructus extract increased beth the amount of melanin and the activity of tyrosinase according to concentration, also supported by western blot analysis. Conclusions : The results suggest that Psoraleae fructus extract has an advantageous effect on the promotion of melanin synthesis and will contribute to the development of vitiligo treatment through further related studies.

• Journal of the military operations research society of Korea
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• v.22 no.1
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• pp.18-29
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• 1996

Nowadays, flooding wast is serious problem to mankind and the endeavour for solving waste problem is performed in connection with environmental problem and natural resource problem. In Korea, there are a lot of movements related to reduction of waste, too. As the solution of these problems, recycling is recommanded and many kinds of recycling technique are devised. In America, military has been playing an important role in recycling area for a long time. This paper is the survey of several articles and working papers about America military's recycling research. We investigated the recycling of water, construction and demolition wastes etc. These research results are very important in real field of military. It is considered our military has to prepare this recycling problem and now it's the right time. All of these can be adapted to our military, commercial companies and civilians through some modification. We suggest that our military should cope with recycling problem more deliberately.

• Journal of Communications and Networks
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• v.4 no.4
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• pp.314-320
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• 2002

The various sectors of the International Telecommunication Union (ITU) have been addressing the evolution of thirdgeneration and future wireless systems in the context of a comprehensive International Mobile Telecommunications 2000 (IMT-2000) project, and within the ITU’s Telecommunication Standardization Sector (ITU-T) a Special Study Group on “IMT-2000 and Beyond” has been established to address the network aspects of these emerging wireless systems. The Special Study Group (SSG) is playing a global role in this general area, in which a number of regional standards development organizations and a variety of industry forums are also active. This paper provides background information on the SSG and describes the SSG’s ongoing work addressing medium-term issues relating to convergence of fixed and mobile systems and the harmonization of evolving IMT-2000 systems. The paper also addresses related mobility management aspects.

• Korean Journal of Child Studies
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• v.30 no.3
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• pp.177-196
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• 2009

The purpose of this study was to provide basic understanding of healthy habits of young children by analyzing existing life patterns that affect the their physical health. 416 parents of young children from kindergartens and daycare centers have responded to a questionnaire. The collected data were analyzed by using mean, standard deviation frequency, was used by SPSS 16.0 program. The conclusion was that the young children present daily life habits, including sleeping, eating, defecating and playing habits were not positive and that the children mostly led an indoor lifestyle. From these results, observations were made that the physical activity for young children is imperative to develop the physical and mental health of the 21st century young children.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.51 no.7
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• pp.311-316
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• 2002

It has been a basic model for the present electric power industry that more than two generators compete, and thereby the market clearing price and the generation schedules are determined through the bid process. In order for this paradigm to be applicable to real electric power systems and markets, it is necessary to reflect many physical and economic constraints related to frequency and transmission in the dispatching schedule. The paper presents an approach to deriving a Nash bargaining solution in a competitive electricity market where multiple generators are playing with the system operator who mitigates the transmission congestion to minimize the total transaction cost. In this study, we take the effect of the line flows and the role of system operator into the Game. Finally, a case study has been demonstrated to verify the proposed cooperative game.

• Journal of the Korean Dietetic Association
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• v.11 no.4
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• pp.462-472
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• 2005

College and university foodservice dietitians have to be competent for playing a role as the future food service executive as well as the present foodservice administrator in the promising foodservice industry field. The study conducted a survey to examine training needs corresponding to educational contents for the purpose of helping them acquire a new knowledge related to self-development and duty through educational training. The results of this study suggested that training needs were differed by general characteristics of dietitians, operational characteristics of food services, and training subjects. A future study should develop systematic training strategies for dietitians.

• Korean Journal of Child Studies
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• v.25 no.3
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• pp.115-126
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• 2004

The purpose of this study was to examine the effects of Korean traditional music education for young children on the development of musical attitude and rhythmic sense of young children. The subjects were 42 four or five-year-old children enrolled in two classes of a public kindergarten. Half were in the experimental and half were in the control group. Instruments were "Music Interest Test for Young Children" (Kim, 2000), "Musical Attitude Rating Scale for Young Children" (Ahn & Han, 1999) and "Primary Measures of Music Audiation" (Gordon, 1986). The procedure included pre-test, treatments and post-test paradigm. Experimental group had Korean traditional music activities three times per week, including listening, appreciation, singing, playing traditional instruments and creative movement. The control group was merely provided with materials related to the Korean traditional music. Data was analyzed by t-test. Results indicated significant differences in music attitude and rhythmic sense between the experimental group and the control group.

• Journal of the Korean Home Economics Association
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• v.48 no.4
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• pp.31-41
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• 2010

The purpose of this study was to investigate the effects of mothers' child-rearing attitudes and children's self-regulation on their prosocial behaviors. The participants were 151 children(aged 5-6) and their mothers. The results were as follows: (1) Subordinate spheres of 'controlling' and 'playing' in mothers' child-rearing attitudes and children's prosocial behaviors showed significant positive correlations. (2) Children's self-regulation was positively related to their prosocial behaviors. (3) When children's self-regulation was controlled, mothers' child-rearing attitudes did not show any positive correlations with children's prosocial behavior. In conclusion, children's self-regulation mediated the association between mother's child-rearing attitudes and prosocial behaviors.