• 대한가정학회지
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• 제50권4호
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• pp.115-125
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• 2012

The purpose of this study is to compare emotional problems, the related risk factors, and protective factors of impoverished children with those of enriched children in order to examine the effects of the related factors, and to suggest practical interventions and the functions of the social welfare service. Participants for this study were 458 students in the 4th, 5th and 6th grade of elementary school located in the Metropolitan area. The major findings were as follows: First, impoverished children had more emotional problems compared with enriched children. Second, poverty was found to influence the emotional problems of children. Third, concerning the relation between a family's poverty and the emotional problems of children, the finding is that eating habits, parents' health problems and marital conflict are mediating-factors.

• 시큐리티연구
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• 제1호
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• pp.17-50
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• 1997

I study on the security organization for the chief of state in North and South Korea. The paper, purporting to analyze security system in comparative prospectives, comprise four chapters. Chapter I Which sets out purpose, scope and method, is followed by Chapter II , dealing largely with the power structure on The Socialist Constitution of Democratic People's Republic of Korea, the protection organization and security activities for the chief of state in North Korea. Chapter III concerns the security environment - terrorist groups, firearms, explosives, suspects, movements of hostile countries and orthers - and the protection organization on The Presidential Security Service for the president in South Korea, culminating in projection of certain problem area. It is followed by concluding observation made in Chapter IV. To be operated security systems effectively, these need to be regulated according to a protective scale, function, authority of a existing.

• 대한전기학회논문지
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• 제39권10호
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• pp.1021-1028
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• 1990

본 논문은 전력계통의 고장진단 전문가시스템에 관한 것으로서 개발된 전문가 시스템은 전력계통에서의 사고 발생시 그 고장구간을 추정하고 보호기기의 오.부작동을 판정하며 이를 통하여 고장의 전파과정을 설명하도록 고안되었으며 또한 사고발생후 취하여질 복구작업에 필수적으로 요구되는 정전구역의 탐색의 효율을 위하여 탐색구간을 제한하였다. 본 전문가 시스템은 포롤로그 언어를 사용하여 구성하였으며 모의계통에 적용하여 그 요 성을 입증하였다. 입증하였다.

• 대한물리의학회지
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• 제1권1호
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• pp.139-146
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• 2006

Purpose : This study is to understand the reactive oxygen which is expected to be a causative factor of aging condition including dementia, atherosclerosis, even cancer. Methods : The reactive oxygen is generated usually when people do very hard exercise or is under severe stressful situation or in unhealthy environment and as a protective reaction to reactive oxygen, human body releases antioxidant enzyme systems like superoxide dismutase (SOD), catalase, glutathione peroxidase (GPX), glutathion-S-transferase (GST) and non-enzymetic antioxidant systems like glutathione, ascorbate, $\beta$-carotene, vitimin E. Results : Nowadays, we are getting more interested in the generation of reactive oxygen especially in the area of physical education, food and nutrition, alternative medicine etc. Conclusion : The study of reactive oxygen in patients with musculoskeletal disease is also required and among various physical therapeutic approaches, the method of general coordinative manipulation is considered more necessary.

• 한국직업건강간호학회지
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• 제8권1호
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• pp.68-83
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• 1999

Occupational health nursing (OH N) guide book has been perceived as necessary since group occupational health services started. This study aimed to develop the guidebook for occupational health nurses working in small-scale enterprises(SSE). The guide area of nursing services was selected in 10 categories. These areas were 4 Workplace attitude for occupational health nursing', 'Nursing process', 'Workplace environmental monitoring', 'Personal protective devices', 'Record', 'Health counselling', 'Communication', 'Health education', 'Health screening' and 'Health promotion'. The content was mainly constructed with literature review. The pretest was done to find out what OH nurses do feel about their OH nursing services. Figures were used to guide some occupational health nursing services (OHNS). The further research was expected to develop in more extensive depth and quality.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.1089-1090
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• 2006

This paper analyzes impedance convergence characteristics and harmonics of electric locomotives operation and fault condition. To simulate the various fault and operation condition, AT feeding system and various locomotives are modeled using PSCAD/EMTDC. Analysis shows that impedance are converged into protection area in the case of short fault between catenary and rail or catenary and feeder line but in the case of disconnection fault, impedance is rater bigger so protective relay can't detect the fault. Therefore more analysis of overload and high impedance fault caused disconnection fault is needed.

• 대한한의학회지
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• 제20권1호
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• pp.161-171
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• 1999

This study was performed to investigate the effect of complex formula(CKRG) consisting of Panax ginseng Radix rubra Koreana. Ganoderma, Cinnamomi Cortex, Glycyrrhizae Radix and Laminariae Thallus on brain ischemia and injury such as KCN-induced brain injury, forced brain ischemia, pulmonary thrombosis. The results were summarized as follows: 1. CKRG extracts showed a decrease of the duration of KCN-induced coma and showcd an increase in life expectancy. 2. CKRG extracts showed a decrease of neurologic grade in hind limb but did not affect neurologic grades in fore limb. Also. CKRG extracts showed a significant decrease of brain ischemic area and edema in MCA occlusion, 3. CKRG extracts showed a protective effect on pulmonary thrombosis induced by collagen and epinephrine. These data suggested that CKRG extracts could be applied to the protection of brain ischemia and injury.

• Tribology and Lubricants
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• 제13권3호
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• pp.56-62
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• 1997

Sealing an oil-air mixture plays important roles to have an enhanced lubrication for high speed spindle. High speed spindles require non-contact type sealing mechanism. In this study, an optimum seal design to minimize leakage is concerned in the aspect of flow control. This paper categorizes geometries of mostly used non-contact type seals and analyzes each leakage characteristics to minimize a leakage on sealing area. Effect of minimum clearance and its position are considered according to variation of detail geometry. The estimation of non-leaking property is determined by amount of pressure drop in the leakage path assuming constant leakage flow. To simulate an oil jet or oil mist type high speed spindle lubrication, the working fluid is regarded as two phases that are mixed flow of oil phase and air phase. Both of the turbulence and the compressible flow model were introduced in CFD(Computational Fluid Dynamics) analysis. Design parameters has been induced to minimize leakage in limited space, and a methodological study on geometrical optimization has been conducted.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2002년도 Proceedings of the International Welding/Joining Conference-Korea
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• pp.29-37
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• 2002

High alloyed stainless steels stand out for a high corrosion resistance due to a protective passive layer which is formed when the content of chromium exceeds 13%. When welding these steels, heat tints arise in the area of the weldment. They may occur from flint yellow to intensive blue in the spectrum depending on the applied welding process and the quality of the backing gas used. Due to their structures, they partly drastically reduce the corrosion resistance of stainless steels so that they may lead to damages of the technical application of welded components. In the following the pitting resistance by different backing gases and the chemical composition of the stainless steel itself are described.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 E
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• pp.2139-2142
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• 1999

765kV substations which will be the core installation of the bulk power transmission system in Korea for the upcoming $21^{st}$ century, were designed of outdoor full GIS type to minimize required area. As principal equipment, main transformers of 2,000 MVA per bank and 50kA 8,000A gas insulated switchgears of up-to-date technology were adopted in designing substations to transmit bulk power of 10GW. Dual digital protective relay systems and distributed indication and control systems with fiber optic LAN were used.