• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2000년도 추계학술대회논문집
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• pp.85.2-93
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• 2000

A demand of marine outfall system have been much increased for the effective disposal of the wastewater due to population and industrial development at the coastal areas. The outfall system discharges primary or secondary treated effluent into coastline or at the deep water, or between these two. The discharge is carried out by constructing a pipeline on the sea bed with a diffuser or with a tunnel, risers and appropriate. The effluent, which has a density similar to that of fresh water, rises to the sea surface forming plume or jet, together with entraining the surrounding salt water and becomes very dilute. Thus there have been growing interests about plume behaviour around the outfall system. Plume or jet discharged from single-port or multi-port diffuser might cause certain impacts on coastal environment. Near field mixing characteristics of discharged water field using CORMIX model with has been studied for effective outfall design various conditions on ambient current, depth, flow rate, effluent concentration, diffuser specification, port specification etc.. This kind of analysis is necessary to deal with water quality problems caused by the ocean discharge. The analyzed vesult was applied to the Pusan Jungang dffluent outfall system plan.

• 한국실내디자인학회논문집
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• 제27권1호
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• pp.88-96
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• 2018

The income level of people in South Korea has risen as the gross national income per capita reached the milestone of 30,000 dollars. More and more consumers try to change their houses according to their tastes just like they express themselves through clothes, bags, and other fashion items, thus pursuing value-based consumption. The changes to the housing culture including the greater percentage of one- or two-person households and the growing trend of lease and monthly rent have made consumers increase their demands for products to express their lifestyles. As a result, global lifestyle shops with characteristic and diverse concepts entered the South Korean market and were joined by South Korean fashion brands, large-sized stores, department stores, and fancy stationery manufacturers, which launched their own brands, in the expansion of lifestyle shops across the nation. Lifestyle shops have a couple of unique attributes including the relatively clear selection of target consumers and a clear set of VMD strategies accordingly. Based on a judgment that there was cost differentiation among brands, the investigator categorized the comparison and analysis criteria into high, middle, and low prices to apply case analysis. This study set out to analyze VMD strategies for spatial composition through cost differentiation among lifestyle shops, take the results into total consideration, and propose an effective and competitive VMD strategy for lifestyle shops through spatial composition elements.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 2004년도 Annual Meeting of the Korean Society ofApplied Pharmacology
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• pp.18-34
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• 2004

This paper will review data obtained primarily from our preclinical investigations that show that exposure to stress has a significant impact on drug taking. Stress increases reward associated with psychomotor stimulants, possibly through a process similar to sensitization, and a growing clinical literature indicates that there is also a link between substance abuse and stress in human addicts. One explanation for the high concordance between stress-related disorders and drug addiction is the self-medication hypothesis, which suggests that a dually-diagnosed person often uses the abused substance to cope with tension associated with life stressors or to relieve symptoms of anxiety and depression resulting from a traumatic event. However, another characteristic of drug self-administration is that drug delivery and its subsequent effects on the HPA axis are under the direct control of the individual. This controlled activation of the HPA axis may result in the production of an internal state of arousal or stimulation that is actually sought by the individual (i.e., the sensation-seeking hypothesis). During abstinence, however, exposure to stressors or drug-associated cues can stimulate the HP A axis to remind the individual about the effects of the abused substance, thus producing craving and promoting relapse. Stress reduction, either alone or in combination with pharmacotherapies targeting the HPA axis may prove beneficial in reducing cravings and promoting abstinence in individuals seeking treatment for addiction. Of primary importance is to reduce the impact of cocaine-associated environmental stimuli on the HPA axis so that they no longer function as triggers for relapse.

• 전기학회논문지
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• 제63권2호
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• pp.197-204
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• 2014

As more and more renewable energy resources are connected into the existing power system and their generation capacities are increasing, the need for regulations to minimize their impacts on the power grid is increasingly growing. And minimizing the irregular impacts made by grid-connected wind generators is important, since the output power generated by renewable energy resources can be changed easily by the weather condition and surrounding environment. In South Korea, an operational technical standard for distributed generation is used as a regulation, in which renewable energy sources including wind power are considered as a kind of distributed generation. In this paper, an international standard, IEC 61400-21, for the grid-connected wind turbine generating system(WTGS) will be introduced and a comprehensive and detailed review on the measuring methods of power quality characteristic parameters for WTGS based on the related IEC standards will be presented. Additionally, some prerequisites for applying the international standards to KEPCO system will be proposed.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2003년도 춘계종합학술대회논문집
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• pp.268-273
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• 2003

본 연구는 지역적 정보화의 성장 잠재력과 필요성 및 지역적 정보화 특성 등을 갖추고 잇는 제천시를 대상으로 지역적 현황을 분석하고 정보화 인프라 구축을 기반으로 하는 지역 정보화 콘텐츠 개발 방안을 제시하였다. 행정, 산업 및 생활 정보화 등 을 위한 지역 정보화 콘텐츠 개발방안을 제시함으로써 지역정보화 콘텐츠 개발에 관한 연구의 확대는 물론, 정보도시의 홍보활동, 정보의 공유, 정보활용의 마인드 제고를 기대할 수 있으며 나아가 주민 복지를 위한 정보도시의 건설과 지역 경쟁력 제고에 이바지할 수 있을 것이다.

• 대한전자공학회논문지
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• 제25권11호
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• pp.1329-1334
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• 1988

$NH_3-O_2$의 열반응에 의해 산화막을 성장시키는 새로운 방법을 소개하고, 기존의 건식산화방법을 이용한 $SiO_2$박막의 특성을 비교 설명하였다. $NH_3$의 유량에 따라서 박막의 성장비가 증가하고, 성장된 막의 구성성분이 건식산화때와 같음을 확인하였다. C-V특성곡선에서도 $Q_{OX}$와 $Q_{SS}$가 거의같았고 히스테리시스현상도 없었다. 또한 n-MOS트랜지스터를 제작하고 측정한 결과 $I_D$-$V_{DS}$특성곡선이 건식산화와 비교하여 우수함을 확인했다.

• 한국추진공학회지
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• 제21권2호
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• pp.26-31
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• 2017

고체 추진제의 환경적 문제는 고체 로켓에서 중요한 이슈로 부각되고 있다. 예를 들어 고체추진제의 산화제인 ammonium perchlorate (AP)는 염산과 같은 독성 가스와 대기 오염을 발생시켜 환경적 문제를 야기한다. 산화제 중 N-guanylurea dinitramide (GuDN)는 높은 성능과 압력 지수를 가지고 있으며, 가스발생기 추진제에서 연소하는 동안 친환경적인 연기를 배출하는 성질을 가지고 있기 때문에 환경친화적으로 효과적인 후보 물질이다. 본 논문에서는 가스발생기 추진제로서 특성에 대하여 이론적 분석, 추진제 제조공정성, 추진제 경도 특성 및 연소특성에 대하여 연구하였다.

• 한국조경학회지
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• 제33권4호
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• pp.1-10
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• 2005

Recently, as urban landscape is growing in importance, urban landscape planning is being actively performed. for this purpose, classification of the urban landscape is definitely required. Therefore, this research focuses on classifying urban landscape in Daejeon metropolis by dividing the urban land use pattern. This results are as follows. 1. Urban land use pattern is divided into 20 classes. The residential, commercial and industrial areas, the old market and the bus terminal are evaluated negatively, whereas the areas of school, water reservoir, neighborhood park and train station are appreciated as being positive in landscape characters. 2. As a result of a cluster analysis, urban landscape has five different landscape types. These are: landscapes of medium diversity lacking green area, landscapes of high diversity lacking green area, landscapes rich in green area and with medium diversity, landscapes rich in green area and with high diversity, and landscapes rich in green area and with low diversity. 3. In landscape characters of beauty and harmony, landscapes rich in green area and with medium diversity are more positively evaluated than those rich in green area and with low diversity. This point should be taken into account for planning the urban landscape.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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• pp.779-782
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• 2003

Hot filament 플라즈마 화학기상 증착법 (HFPECVD)를 사용하여 전처리 조건에 따른 탄소나노튜브의 성장 특성을 관찰하였다. 암모니아 ($NH_3$)를 희석가스로 사용하였고, 아세틸렌 ($C_2H_2$)를 탄소 원료가스로 각각 사용하였다. 암모니아 가스 플라즈마를 사용하여 전처리 된 니켈 촉매 층의 SEM (Scanning Electron Microscopy) 이미지를 관찰하여 본 결과, 나노 사이즈의 촉매 그레인(grain)을 발견할 수 있었다. 그리고 탄소 나노튜브의 직경과 성장 밀도 또한 전처리 된 촉매 층에 따라 다른 양상을 보였다. TEM (Transmission Electron Microscopy)를 사용하여 탄소나노튜브를 관찰한 결과 공동구조(hollow)를 한 다중벽 탄소 나노튜브(MWCNT)를 관찰할 수 있었다. 성장된 나노튜브는 끝에 금속팁을 가지고 있으며, 나노튜브의 팁은 촉매로 사용한 것과 같은 물질로 구성되어 있었다. Raman spectroscopy를 사용하여 측정된 B-밴드와 G-밴드의 피크들은 각각 $1360cm^{-1}$와 $1598cm^{-1}$ 부근에서 나타났으며, 전처리 조건을 달리하여 성장시킨 탄소나노튜브 필름에서 이들 두 피크의 위치는 이동하지 않았고, 두 피크의 강도 비율 ($I_G/I_D$)은 전처리 조건에 따라 변하였다.

• Journal of Yeungnam Medical Science
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• 제10권2호
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• pp.493-505
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• 1993

저자들은 1예의 선천성 피부결손증을 경험하고 국소피판술과 피부이식으로써 치료하고 술후 발생된 부분적 괴사는 습윤치료로써 자연치유시켜 만족스러운 결과를 얻었고, 4예의 craniosynostosis 환자를 진단하고 modified Marchac's method, Persing's method를 이용하고 교정하였고 CT를 이용한 뇌용적 측정으로 예후를 판정할 수 있었다.