• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.499-504
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• 2008

DC substation of urban transit supplies a suitable DC power on electricity vehicles by being supplied from KEPCO. DC substation is verified electrical safety of system through pre-operation inspection on electrical installations to be supplied power from KEPCO. However, because test items and method for DC traction system are unprepared on pre-operation inspection, the general safety and performance verification of DC traction system are very insufficient. Therefore this paper analyze the overseas test examples such as factory equipment tests, factory combined tests and railway tests for the safety and performance verification of DC traction system and present a suitable test items and test standard in domestic.

• Journal of Preventive Medicine and Public Health
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• 제7권1호
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• pp.115-121
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• 1974

In order to evaluate the health hazard due to exposure to organophosphorus insecticides, we measured the blood cholinesterase activity ana urinary para-nitrophenol among 56 exposed subjects. They are orchard workers, rice plant workers and smithion factory workers. The clinical symptoms were also checked by physicians. We also measured the blood cholinesterase activity and urinary para-nitrophenol excretion of 20 urban people and 15 rural people who had never been exposed to organophosphorus insecticides in order to compare them according to age, sex and geographical differences. And these results were also compared with those of exposed groups. The results obtained were as follows. 1. The normal plasma cholinesterase activity and cell cholinestrase activity were $0.861{\pm}0.148\;{\Delta}pH/hr$ and $0.822{\pm}0.154\;{\Delta}pH/hr$. And normal para-nitrophenol in urine was $1.21{\pm}0.52mg/liter$. 2. No significant difference was existed in blood cholinesterase activities and urinary para-nitrophenol excre tion according to sex, age and geographical difference. 3. The plasma cholinesterase activity and cell cholinesterase activity of orchard workers, rice plant workers and smithion factory workers were $0.682{\pm}0.189\;{\Delta}pH/hr,\;0.775{\pm}0.160\;{\Delta}pH/hr,\;0.754{\pm}0.123\;{\Delta}pH/hr,\;and\;0.691{\pm}0.082\;{\Delta}pH/hr,\;0.756{\pm}0.117\;{\Delta}pH/hr,\;0.739{\pm}0.117\;{\Delta}pH/hr$. And significant decreses in blood cholinesterase activities were existed among orchard workers and smithion factory workers compared with control group. 4, The urinary para-nitrophenol excretions of orchard workers, rice plant workers and smithion factory workers were $1.33{\pm}0.66mg/liter,\;1.19{\pm}0.88mg/liter\;and\;1.37{\pm}0.67mg/liter$ and there were no significant difference between exposed groups and control group. 5. The clinical symptoms complained during and after organophosphorus insecticides exposure were frequently ranked by headache (67.7%) and vertigo (64.5%) and muscular ataxia and weakness (51.6%).

• 한국생물환경조절학회:학술대회논문집
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• 한국생물환경조절학회 1998년도 임시총회 및 학술논문발표요지
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• pp.69-72
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• 1998

도시환경은 다양한 형태로 발생되는 공해로 인해 악화되고 있으며 이러한 환경은 인간의 건강을 위협하며, 도시뿐 아니라 주변지역으로의 환경파괴를 가속시키고 있다. 도시 내에서 발생하는 탄산가스, 폐열 등의 인간에게 유해한 물질을 농업으로 전환시켜 농업생산에 이용하는 것은 필요하다고 할 수 있다. 도시내의 잉여 이산화탄소를 이용하여 식물을 생산하고 식물재배공간으로부터 나오는 신선한 공기를 인간이 이용하는 도시형 식물공장의 개념은 환경과 생산의 두 가지 측면을 가지고 있다. (중략)

• 한국생물환경조절학회:학술대회논문집
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• 한국생물환경조절학회 1998년도 임시총회 및 학술논문발표요지
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• pp.66-68
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• 1998

도시환경은 가양한 형태로 발생되는 공해로 인하여 악화되고 있다. 각종 유해가스는 대기오염을 통해 인간의 건강을 위협하고 있으며, 도시 폐기물은 도시 및 주변지역으로의 환경파괴를 가속시키고 있다. 도시 내에서 방출되는 각종 에너지원을 식물공장을 통한 적정 작물생산에 적용시킬 수 있다면, 도시와 상호 보완적인 역할이 가능한 환경 보존형 도시농업이 가능하다. (중략)

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 A
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• pp.424-426
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• 1999

In this paper, the design characteristics, the manufacturing process and the results of performance test on the AC traction motor for urban transit standard E.M.U which is newly developed with applying standardization specification will be introduced. It is reviewed that the design and performance analysis on conventional motors considering system correlation and design constraint and the design optimization through an analysis of electro-magnetic, thermal and dynamic properties. The properties of factory products manufactured by 200 Class VPI process exhibit a excellent performance with a lower noise and vibration, higher efficiency and power factor etc.

• 도시과학
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• 제6권2호
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• pp.17-27
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• 2017

최근, 하천의 수질오염 및 악취발생으로 민원이 증가하여 하천환경개선에 큰 관심이 모아지고 있다. 본 연구의 목적은 하수 유입부에 대해 무인항공기(UAV)를 활용하여 RGB 및 적외 열 영상을 획득하고 하천제방 정비 계획 및 하천 오염 현황의 모니터링을 위한 응용성을 검토하였다. 특히, 하천 인근 공장에서 배출되는 폐수를 적외 열 영상으로 검출하여 폐수의 전파를 모니터링하였다. 또한 하천 제방 정비대상 지역과 인근지역에 대한 RGB영상을 SfM(Structure from Motion)기반 영상 해석을 통해 고정밀 3차원 모형을 제작하고 정확성을 검토하였다. 연구결과, UAV영상을 활용, 폐수유입에 따른 하천의 온도변화를 감지하여 수질오염의 유입부 및 전파 현상을 모니터링 할 수 있었다. 또한 고정밀 3차원 모델(수치지형도, 정사영상)을 제작, 정확성을 검토하고 하천의 제방정비를 위한 정밀 3차원 정보 및 식생 피복정보를 도출할 수 있었다.

• International Journal of Concrete Structures and Materials
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• 제18권3E호
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• pp.165-171
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• 2006

Environment-friendly materials are increasingly used as building construction materials nowadays, and the market share of those is growing. Accordingly, the research and developments in terms of environmental value are progressing steadily now. The main characteristics of environmental products are far-infrared radiation, negative-ion emission, electromagnetic wave shielding, and antimicrobial property. These products are often used in mortar and as spray on the finishing material. Nevertheless, there are hardly any research on the functional properties of concrete, the main material in construction field. Thus, we evaluated such basic properties of concrete as slump, compressive strength and air content while using such functional materials as sericite, wood-pattern sandstone, carbon black and nano-metric silver solution to focus on their functional properties like far-infrared radiation, negative ion emission, electro magnetic wave shielding, and antimicrobial activity in this research. The results indicated that the most useful material in the functional materials was carbon black. Sericite and nano-metric silver solution had a little effect on the functional property. Moreover, although wood-pattern sandstone had very high functional property, it exhibited too low compressive strength to be applied, to concrete as a factory product. Antimicrobial property of nano-metric silver solution in the concrete was not clear demonstrated, but if these specimens were to be aged in $CO_2$ gas for a long time, it might be apparent.

• 한국산학기술학회논문지
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• 제19권6호
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• pp.137-146
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• 2018

축산시설 사이의 차량이동은 국내에서 가축전염병 확산의 주요 원인이다. 이 같은 상황에서 본 연구는 축산시설의 차량이동 네트워크에서 주요한 위치를 차지하는 허브시설을 도출하고, 그 특성을 분석하는 것을 목적으로 한다. 이를 위하여 본 연구는 농림축산검역본부의 KAHIS(Korea Animal Health Intergrated System)에서 제공하는 축산시설의 차량 진출입자료를 활용하였다. 허브시설의 도출에는 사회연결망 분석의 대표적인 중심성 지표인 연결정도 중심성과 매개 중심성 지표를 활용하였다. 본 연구의 분석결과를 요약하면 다음과 같다. 첫째, 축산시설의 차량이동 네트워크에는 다른 시설에 비하여 매우 높은 중심성 지표 값을 가지는 소수의 허브 시설이 존재한다. 둘째, 연결정도 중심성 기준의 허브시설은 사료공장, 집유장, 도축장, 도계장, 가축시장이다. 셋째, 매개 중심성 기준의 허브시설은 가축시장, 사료공장, 도축장이다. 넷째. 연결정도 중심성에 기반한 허브시설은 특정지역에 집중되어 입지하고 있으나, 매개 중심성에 따른 허브시설을 상대적으로 고르게 분포하고 있다. 다섯째, 중심성 지표에 따른 허브시설은 시간이 지나도 상당히 안정적으로 유지된다. 본 연구는 축산시설 사이의 차량 이동이 가축 전염병 전파의 주요 원인으로 지목되는 상황에서, 방대한 진출입 자료를 활용하여, 허브시설을 도출하였다는 점에서 그 의의가 있다.

• 복식문화연구
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• 제25권5호
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• pp.708-717
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• 2017

Industrial innovation in Britain, during the eighteenth and nineteenth centuries, stimulated the introduction of the factory system and the migration of people from rural agricultural communities to urban industrial societies. The factory system brought elevated levels of economic growth to the purveyors of capitalism, but forced people to migrate into cities where working conditions in factories were, in general, harsh and brutal, and living conditions were cramped, overcrowded and unsanitary. Industrial developments, known collectively as the 'Industrial Revolution', were driven initially by the harnessing of water and steam power, and the widespread construction of rail, shipping and road networks. Parallel with these changes, came the development of purchasing 'middle class', consumers. Various technological ripples (or waves of innovative activity) continued (worldwide) up to the early-twenty-first century. Of recent note are innovations in digital technology, with associated developments, for example, in artificial intelligence, robotics, 3-D printing, materials technology, computing, energy storage, nano-technology, data storage, biotechnology, 'smart textiles' and the introduction of what has become known as 'e-commerce'. This paper identifies the more important early technological innovations, their influence on textile manufacture, distribution and consumption, and the changed role of the designer and craftsperson over the course of these technological ripples. The implications of non-ethical production, globalisation and so-called 'fast fashion' and non-sustainability of manufacture are examined, and the potential benefits and opportunities offered by new and developing forms of social media are considered. The message is that hand-crafted products are ethical, sustainable and durable.

• 토지주택연구
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• 제10권2호
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• pp.59-67
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• 2019

The recent paradigm shift in the construction industry has led to a growing demand for industrial construction. In particular, interest in modular housing, one of the areas of industrialization architecture, is soaring. Modular housing is a construction method for completing a building by transporting factory-built modules to the site and assembling them. However, modular housing in Korea has various problems such as errors in design books, lack of factory drawings, and lack of on-site construction plans. BIM is a tool for accumulating, producing and managing various information through 3D models and is a solution to solve various problems of modular housing. In this study, problems of modular housing and BIM utilization of modular housing were presented as ways to ensure the quality of modular housing. Therefore, this study analyzed the problems that are occurring in the construction process of modular housing. And, to address the problem of modular housing, BIM utilization measures were proposed for each modular process step. However, the application of BIM in domestic modular project is currently being carried out in pilot research project. Because of this, the BIM utilize method for modular housing is limited based on the BIM use for general projects and the examples for some modular pilot projects.