• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2005년도 춘계 학술대회
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• pp.476-484
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• 2005

본 논문은 PWR 발전소에서 환경으로 방출된 기체 형태의 $C^{14}$에 의해 발전소 주변 주민이 받을 수 있는 선량을 비교적 정확하게 평가하기 위한 것으로 국내의 선량평가 프로그램에서는 축산물 섭취선량을 평가하기 위해 동물성 전이계수를 적용하고 있지만 전적으로 해외의 자료를 적용하고 있고, 동물의 체적에 따른 영향을 반영하지 못하고 있다. 본 연구에서는 동물성 전이계수 관련 자료 및 개발 방법론에 대한 분석을 수행함과 동시에 $C^{14}$ 피폭선량을 평가하였고, 그 결과에 근거하여 국내 환경을 충분히 고려할 수 있는 동물성 전이계수 적용 방안을 도출하였다. CSA 및 KEPRI에서 제시한 자료를 적용하여 $C^{14}$ 피폭선량을 계산한 결과 가장 보수적인 비방사능 모델에 비해 높거나 동일한 결과를 주었는데 이는 물리적으로 타당성이 없는 결과였고, NRC에서 제시한 자료를 적용한 경우 피폭선량은 낮게 나타났지만 동물의 체적변화에 따른 영향을 전혀 반영하지 못하고 있었다. 따라서 경제 성장에 따른 축산물 섭취량 증가와 발전소 주변 환경을 충분히 반영함으로써 $C^{14}$에 의해 발전소 주변 주민이 받을 수 있는 피폭선량을 비교적 정확하고 현실성 있게 평가하기 위해서는 실험을 통해 동물성 전이계수를 제시해야 할 것으로 판단되며 이에 대한 구체적인 실험 방법 및 방안은 제시하였다.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2005년도 학술발표회 논문집
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• pp.308-315
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• 2005

The capacity protection is normally related with slenderness effect of the columns, force transfer in connections between columns and adjacent elements, and shear design of columns. It is intends to prevent brittle failure of the structural components of bridges, so that the whole bridge system may show ductile behavior and failure during earthquake events. For bridge systems, this means it is necessary to assess the overstrength capacity of columns prior to proceeding with the design of foundation and superstructure. The objective of this paper is to develop a capacity design approach that applies an overstrength factor for determination of possible maximum shear force in the plastic hinge zone of reinforced concrete bridge columns. In order to estimate and determine overstrength factor, material strength was developed to investigate for actual material strength total 3,407 steel and 5,405 concrete by domestic product. Based on actual material strength, this paper was conducted on moment overstrength factors using moment-curvature analysis program. And also design recommendations for capacity design are presented to revise the annual report, KEERC 2002.

• 벤처창업연구
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• 제9권5호
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• pp.69-81
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• 2014

기술이전 사업화에 대한 관심은 국내뿐만 아니라 세계적으로 확대되고 있는 추세이다. 이에 본 연구는 기술이전 사업화에 대한 개념의 고찰 및 기술이전 사업화를 가속화시키기 위하여 고려되어야 할 촉진요인을 도출하여 실증적인 분석을 실시하였다. 기존의 기술이전 사업화의 경우 그 범주에 대한 정의에 있어 기술 발굴, 기술의 이전 및 그에 따른 사업화의 범주로 국한시키는 경향이 있었다. 이에 본 연구에서는 기술이전 사업화에 대하여'무형의 축적된 기술 노하우 지식 등 지적재산 또는 특정 목표를 달성하기 위하여 시행된 기술개발이 기술이전 당사자 간의 계약 협상 등을 통하여 이전되어 무형의 기술이 유형의 상품으로 제품화되는 활동 및 그에 따른 경제적 이익을 획득하는 제반 활동'으로 그 범주를 확장하여 정의하였다. 또한, 기술이전 사업화에 대한 실증분석 결과를 살펴보면, 현재까지는 기술이전 사업화를 가속화시킴에 있어 대상 기술, 대상 기술에 대한 관리, 기술이전 사업화에 대한 제도 및 관련 조직의 효율성 확보에 초점이 맞춰져 있으며, 기술사업화 단계에 있어 금융지원에 대해서는 상대적으로 인식이 미흡한 것으로 나타났다. 이는 기존의 기술이전 사업화에 대한 관점이 기술이전과 기술사업화에 따른 특허등록 출원, 기술이전 건수, 기술료 등의 정량적 성과에 초점이 맞춰져 있어, 상대적으로 기술이전 사업화를 통한 기술창업, 양질의 고용창출 등 창조경제 실현과 직결된 경제적 성과 창출에는 다소 인식이 미흡한 현 상황을 반영한 결과로 판단된다. 이에 본 연구는 기술이전 사업화가 단순히 정량적 성과를 확보하기 위한 수단에 그치는 것이 아니라, 기술이전 사업화 주체들의 안정적인 생태계 조성 및 그에 따른 창조경제를 실현할 수 있는 환경 구축에 보다 관심을 갖아야 한다는 인식 전환의 필요성을 도출했다는 점에서 향후 기술이전 사업화의 활성화 방안 마련 등의 정책자료로 활용될 수 있을 것이다.

• 대한가정학회지
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• 제38권11호
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• pp.105-114
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• 2000

The purpose of this study was to investigate the wearing satisfaction of highschool girls’summer uniforms, and to evaluate the comfort-related properties of fabrics used in the uniforms. The subjects were 441 female high school students attending three different schools in Chongju city. The data was collected using self-administered questionnaires to measure the wearing satisfaction of summer school uniforms. Factor analysis, t-test, and F-test were used for data analysis. The heat and moisture transfer properties and air permeable properties of their fabrics were evaluated to measure as comfort-related properties. 1. Most students were wearing blouses made of polyester/rayon blended fabrics and skirts made of 50% wool and 50% polyester blended fabrics. 2. Clothing care and management, and appearance of summer school uniform were assessed positively, while style and design, and the level of comfort were assessed negatively. 3. The subfactors of wearing satisfaction varied according to school, style and design, and fabrics of high school girls’summer uniforms. 4. PET fabrics were rated as having a lower value of thermal retention and a higher value of air permeability than other blouse fabrics. 5. There were not differences significantly in thermal properties according to skirt materials.

• 한국생활과학회지
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• 제21권1호
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• pp.151-163
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• 2012

The purpose of this study was to examine the effects of perceived fit and brand transfer on extension evaluation in luxury fashion brands. The instrument for this research was a self-administered questionnaire based on a previously developed scale. The variables addressed in this scale included perceived fit, brand value for both parent brand (clothing) and extension brand (home line), extension brand association, and purchase intention of the product in extension brands. The participants in this research comprised of 215 female consumers between the ages of 19 and 51 demographically distributed nationwide. Data were analyzed by descriptive statistics, paired t-test, factor analysis, and regression analysis via SPSS 12.0. Findings showed that brand value consisted of two factors: cognitive and hedonic value in luxury fashion brands. Parent brand value was significantly related to perceived fit with a positive effect on brand association and hedonic value in extension brands. With respect to brand transfer, cognitive value of the parent brand increased the extension brand's cognitive value, while hedonic value of the parent brand increased the extension brand's hedonic value. In addition, purchase intention of the product in the extension brands was determined by the perceived fit and hedonic value of extension brands. This study also discusses the managerial implications for marketers in developing effective luxury brand extensions into new product categories, which leads to a synergy effect in building brand equity in the luxury fashion market.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2019년도 추계학술대회
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• pp.271-271
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• 2019

선체운동은 외력관계 등 복잡한 환경에서 발생하므로 추정이 난해하다. 선체운동의 추정은 선박의 안전을 확보할 수 있는 중요한 요소이므로 정확한 추정이 필요한 실정이다. 기존의 선체운동관련 연구는 특정 선형에 대한 선체운동을 실험하여 획득한 모델과 기준이되는 모델의 겉보기 운동을 비교한 것으로 선체운동을 직관적으로 추정하기 난해하다. 본 연구에서는 선형-시불변 (Linear-Time lnvariant)시스템의 전달함수 기법을 적용해 선체운동을 극-영점 해석과 주파수 응답 분석을 통해 선체운동의 특성을 전달함수로 추정하는 개념을 소개한다. 선형-시불변 시스템을 이용한 선체운동 해석 모델은 1)파랑의 입력신호와, 2)선체운동의 출력신호, 3)블랙박스로 정의된 선체로 구성된다. 본 모델은 선체운동을 전달함수로 수치화 하여 정의할 수 있고, 극-영점해석 및 주파수 응답 분석을 통해 선체운동의 특성을 추정하는데 용이할 것으로 기대된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권9호
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• pp.4207-4222
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• 2016

In a P2P (Peer-to-Peer) VoD (video-on-Demand) streaming system, the nodes' load is an important factor which affects the system performance. In the system, some nodes may receive too many requests, which leads to overload. On the other hand, some other nodes may receive too few requests, which leads to low utilization. Therefore, designing a reasonable load balancing strategy is important. However, existing related studies cannot handle this problem effectively, because they don't have an efficient dynamic load information management mechanism, and they don't distinguish the difference of requests when transfer the nodes' load. In this paper, to manage the dynamic load information efficiently, we design a load management table for each node. Based on the load information, we propose a load balancing strategy which uses a request migration algorithm (LBRM). Through simulations, our scheme can handle the load imbalance problem effectively and improve the users' playback fluency.

• 한국유체기계학회 논문집
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• 제14권1호
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• pp.34-41
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• 2011

Fire characteristics can be analyzed more realistically by using more accurate properties related to the fire dynamics and one way to acquire these fire properties is to use one of the inverse property estimation techniques. In this study two optimization algorithms which are frequently applied for the inverse heat transfer problems are selected to demonstrate the procedure of obtaining pyrolysis properties of charring material with relatively simple thermal decomposition. Thermal decomposition is occurred at the surface of the charring material heated by receiving the radiative energy from external heat sources and in this process the heat transfer through the charring material is simplified by an unsteady 1-dimensional problem. The basic genetic algorithm(GA) and repulsive particle swarm optimization(RPSO) algorithm are used to find the eight properties of a charring material; thermal conductivity(virgin, char), specific heat(virgin, char), char density, heat of pyrolysis, pre-exponential factor and activation energy by using the surface temperature and mass loss rate history data which are obtained from the calculated experiments. Results show that the RPSO algorithm has better performance in estimating the eight pyrolysis properties than the basic GA for problems considered in this study.

• 한국자동차공학회논문집
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• 제5권6호
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• pp.77-88
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• 1997

The heat rejection to coolant is a dominant factor for building vehicle cooling system such as radiator and cooling fan. Since the vehicle cooling system also has effects on fuel consumption and noise, the study of heat rejection to coolant has been emphasized. However, the study on heat rejection to coolant has been mainly focused on the field that related to the characteristics of combustion and localized heat loss. It is no much of use in design for the entire cooling system because it is focused on such a specific point. In this work, the heat rejection rate to coolant for four different engines are obtained to derive a simple heat transfer empirical formula that can be applied to the engine cooling system design, and it is compared with the other studies. Also, to observe effects of engine operation factors and heat transfer factors on coolant, we measured the metal temperature and the heat rejection rate. The heat rejection to coolant does not depend significantly upon the coolant flowrate, but mainly upon the amount of air fuel mixture and the air fuel ratio as long as the composition of coolant does not change. The reduction of heat rejection to coolant did not effectively improve the fuel consumption, but was mostly converted to raise the exhaust gas temperature and the oil temperature.

• 복식문화연구
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• 제21권5호
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• pp.684-698
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• 2013

Interest and desire for analogue emotion increased with the dazzling development of digital technology. Especially, as analogue emotion got grafted in the design field, analysis through various expression media is being done. This study seeks to propose design of t-shirt using unique advantage of Hangeul calligraphy that can satisfy the modern flow and pattern design's various expressions. Calligraphy is being used in various fields such as advert, package, logo, movie poster, signboard, graphic design, calligraphy and abstract painting. Formative yet effective in readability and conveying meaning as it's expressed in letters, calligraphy is a field of attention with its contribution in extending the new design area. As a method of the study, altogether 8 pieces of t-shirts were proposed through related preceding research, literary research, co-work with calligraphy author, computer graphic program, and heat transfer. As such, the t-shirt designs which were created by suggesting various design and using traditional materials like calligraphy, can be used as novel and sensual factor, where one can get a glimpse at the potential of development as traditional fashion product.