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구상회,이정호,Gu, Sang-Hoe,Lee, Jeong-Ho 한국방위산업진흥회 1993 國防과 技術 Vol.- No.172
남아공의 무기체계는 대부분 해외기술도입이나 직구매에 의한 것들이 아니라 어려운 여건 속에서 자력갱생하여 얻어진 기술을 바탕으로 개발된 장비입니다. 이런 무기체계는 국경전쟁을 통해 성능이 입증되거나, 전장운용을 통해 성능이 개량된 것들로 남아공의 지형과 여건에 맞는 독자적인 모델을 갖추고 있습니다
구상회,이정호,Gu, Sang-Hoe,Lee, Jeong-Ho 한국방위산업진흥회 1993 國防과 技術 Vol.- No.173
남아공의 무기개발은 개발의비용 대 효과와 운용의 경제성, 철저한 종합군수지원(ILS)등을 고려하여 추진됩니다 남아공이 앞으로 무기금수 조치의 국제적 압력으로부터 벗어나 국제 무기시장에 본격적으로 뛰어들었을 때, 이것들은 남아공장비들의 경쟁력 제고에 강력한 영향을 줄 것으로 보입니다
강보영(Bo-Yeong Kang),김대원(KAIST)(Dae-Won Kim(KAIST)),구상옥(Sang-Ok Gu),이상조(Sang-Jo Lee) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.1B
If there is an Information Retrieval system which comprehends the semantic content of documents and knows the preference of users, the system can search the information better on the Internet, or improve the IR performance. Therefore we propose the IR model which combines semantic based indexing and fuzzy relevance model. In addition to the statistical approach, we chose the semantic approach in indexing, lexical chains, because we assume it would improve the performance of the index term extraction. Furthermore, we combined the semantic based indexing with the fuzzy model, which finds out the exact relevance of the user preference and index terms. The proposed system works as follows: First, the presented system indexes documents by the efficient index term extraction method using lexical chains. And then, if a user tends to retrieve the information from the indexed document collection, the extended IR model calculates and ranks the relevance of user query, user preference and index terms by some metrics. When we experimented each module, semantic based indexing and extended fuzzy model, it gave noticeable results. The combination of these modules is expected to improve the information retrieval performance.
자율주행 환경에서 Unity-RL 을 이용한 심층강화학습 시각화 및 시뮬레이션에 관한 연구
이구상(Gu Sang Lee),윤원준(Won Joon Yun),정소이(Soyi Jung),김중헌(Joongheon Kim) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.6
본 논문은 자율주행 환경에서 Unity-RL 을 이용하여 강화학습의 시각화 및 시뮬레이션에 대해 설명한다. 강화학습에 사용된 정책을 최적화하기 위한 알고리즘은 Deep Q Network (DQN)이다. 학습방법은 Unity 에서 제공하는 ML-Agent 의 강화학습 환경을 이용하여 배치(Batch) 학습하였다. 4 개의 바퀴에 속도와 각속도가 Action 으로 적용되며 도로의 과충돌하는 것을 방지하고 도로를 따라 이동하는 시뮬레이션을 구현을 통해 강화학습의 시각화를 보여준다.
드론 환경에서 Unity-RL 을 이용한 심층강화학습 시각화 및 시뮬레이션에 관한 연구
이구상(Gu Sang Lee),윤원준(Won Joon Yun),김중헌(Joongheon Kim) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2
본 논문은 드론 환경에서 Unity-RL 을 이용하여 강화학습의 시각화 및 시뮬레이션에 대해 설명한다. 강화학습에 사용된 정책을 최적화하기 위한 알고리즘은 Proximal Policy Optimization (PPO)이다. 학습방법은 Unity 에서 제공하는 Multi Agents Parallel Processing 방법을 이용하여 배치(Batch) 학습하였다. 4 개의 모터에 추진력으로 Action 이 적용되며 장애물을 넘고 Goal 로 드론이 이동하는 시뮬레이션을 구현을 통해 강화학습의 시각화를 보여준다.
전통주택과 현대 공동주택 열적 특성 분석을 통한 분할난방시스템의 개발
이선우(Lee Sun-Woo),조구상(Jo Gu-Sang),조가영(Cho Ga-Young),여명석(Yeo Myoung-Souk),김광우(Kim Han-Kook) 한국건축친환경설비학회 2008 한국건축친환경설비학회 학술발표대회 논문집 Vol.- No.-
??Korean people have been accustomed to live warm floor surface since long time ago by using floor heating system called Ondol. Thus, thermal environment that occupants feel in a room is effected not just indoor temperature but also floor temperature. Due to this specific life style of Korean, occupants can't feel thermal comfort in a room in the case that floor temperature is not in comfort zone although indoor temperature is in. Moreover, to adjust floor temperature that occupants feel comfortable, heating system is operated higher than general floor temperature and it could be increase energy consumption. Therefore, to solve these problems, we suggest partial radiant heating system that classified floor surface into different temperature and controlled each floor temperature at one time. The aim of this paper is to settle a concept of the partial radiant heating system and to present design process of this system.
김의수(Eui-Su Kim),임구상(Gu-Sang Yim),최경숙(Kyung-Sook Choi),정광호(Gwang-Ho Jeong),이미영(Mi-Young Lee),류승호(Seung-Ho Ryu),윤은경(Eun-Kyung Yoon) 한국식품과학회 2016 식품과학과 산업 Vol.49 No.2
Sodium is a component of salt and naturally taken in the process of taking in table salt. For food processing, salt is very important. In general, salt adds flavor and taste including a salty taste and rheologically, it plays an important role in forming tissues. Also, it helps in improving preservability of food by controling growth of microorganisms. But excessive intake of salt has been blamed for outbreak of high blood pressure, heart disease, stroke, osteoporosis, kidney stone, stomach cancer and others. For this reason, there are active efforts to reduce sodium of processed foods all around the world. In Korea, a guideline for sodium reduction in 27 items and 44 kinds of foods including confectionery was suggested as part of the ‘processed food sodium reduction guideline development project’, which has been conducted since 2012.
유족과의 면담을 통한 자살자 심리부검과 경찰 수사기록 조사를 통한 자살자 심리부검 결과 비교
최진화(Jin-Hwa Choi),이구상(Gu-Sang Lee),유혜림(Hye-Lim Yoo),서지혜(Jihye Seo),김은지(Eun Ji Kim),전홍진(Hong Jin Jeon) 대한신경정신의학회 2021 신경정신의학 Vol.60 No.1
Objectives This study compared the psychological autopsies of suicide victims through interviews of the bereaved family members and investigations of the police death records. Methods A psychological autopsy was performed using both the Korea Psychological Autopsy Checklist (K-PAC) through an interview of the bereaved family members and the Korea Psychological Autopsy Checklist for Police Record (K-PAC-PR) from the police death records at the same suicide victims. The frequency and percentage of each analysis item were checked, and the information collected was compared. Results Of 129 victims, information from two methods showed no significant differences in marital status, employment status, cohabitation status and relationship, location of suicide, method of suicide, and main cause. Among the stress information at the time of death, interpersonal and mental health problems were consistent, but the occupational, economy, family-related, physical health problems were estimated to have greater impact according to the interview methods. The estimates of depression, schizophrenia, bipolar disorder, and dementia were consistent, but the investigation method estimated more sleep disorders and anxiety disorders, and the interview methods estimated more drug use disorders. Conclusion Based on the analysis results, the two methods of a psychological autopsy should be properly utilized, and effective suicide prevention using the psychological autopsy information was discussed.