• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 춘계학술대회논문집B
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• pp.465-471
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• 2000

The flow characteristics around an elliptic cylinder with axis ratio of AR=2 located near a flat plate were investigated experimentally to study the interaction between the cylinder wake and the turbulent boundary layer. The pressure distributions on the cylinder surface and on the flat plate were measured with varying the angle of attack of the cylinder. In addition, the velocity profiles of wake behind the cylinder were measured using a hot-wire anemometry As the angle of attack increases, the location of peak pressure on the windward and leeward surfaces of the cylinder moves toward the rear and front of the cylinder, respectively. At positive angles of attack, the position of the minimum pressure on the flat plate surface is moved downstream, but it is moved upstream at negative angles of attack. With increasing the angle of attack, the vortex shedding frequency is gradually decreased and the critical angel of attack exists in terms of the gap ratio. By installing the elliptic cylinder at negative angle of attack, the turbulent boundary layer over the flat plate is disturbed more than that at positive incidence. This may be attributed to the shift of separation point on the lower surface of the cylinder according to the direction of the angle of attack.

• 대한기계학회논문집B
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• 제24권7호
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• pp.976-983
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• 2000

The flow characteristics around an elliptic cylinder with axis ratio of AR=2 located near a flat plate were investigated experimentally to study the interaction between the cylinder wake and the turbulent boundary layer. The pressure distributions on the cylinder surface and on the flat plate were measured with varying the angle of attack of the cylinder. In addition, the velocity profiles of wake behind the cylinder were measured using a hot-wire anemometry As the angle of attack increases, the location of peak pressure on the windward and leeward surfaces of the cylinder moves toward the rear and front of the cylinder, respectively. At positive angles of attack, the position of the minimum pressure on the flat plate surface is moved downstream, but it is moved upstream at negative angles of attack. With increasing the angle of attack, the vortex shedding frequency is gradually decreased and the critical angle of attack exists in terms of the gap ratio. By installing the elliptic cylinder at negative angle of attack, the turbulent boundary layer over the flat plate is disturbed more than that at positive incidence. This may be attributed to the shift of separation point on the lower surface of the cylinder due to the presence of a ground plate nearby.

• 대한예방한의학회지
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• 제15권2호
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• pp.131-143
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• 2011

Objective : The aims of this study are to investigate the trend of internet journalism about the toxicity and safety of the herbal medicine, and to suggest the regulatory solution of the issue. Method : In this study, we had searched the internet news article published from 2001 to 2011 in the five major portal sites-NAVER, DAUM, Nate, Google Korean, and Yahoo Korean. The search terms were 'herbal medicine', 'adverse event', 'toxicity'. If the articles described the same event in the same form and tone, the articles were considered overlapping. The overlapped articles were excluded. The articles were categorized by the form and tone. The form categories were straight news, interpretative story, editorial, interview, and the tone categories are the positive, the negative, and the neutral. The regulations were searched about the negative issue. Result : Total 56 articles were reviewed. There were 19 positive articles, 29 negative articles, 8 neutral articles. Most negative issues have the proper regulations, but insufficient measures for the adverse event reporting system. Conclusion : The herbal medicine specified adverse event reporting system is essential.

• 한국인구학
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• 제29권1호
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• pp.97-131
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• 2006

본 연구는 요즈음의 청소년 자녀와 어머니 사이의 관계를 교환이론의 관점에서 분석하고자 이루어졌다. 포아 등이 제시한 서비스 물품, 금전 정부 지위, 애정을 포함하는 6가지 자원영역 개념과, 긍정적 교환(보상)과 부정적 교환(처벌)의 구분을 활용하여, 어머니와 청소년 자녀 간에 어떠한 자원이 교환되는지, 교환되는 자원이 상호간에 어떠한 가치를 지니는지, 자원의 제공이 일방적으로 이루어지는지 대칭 적인지, 자녀의 성별이나 연령/발달단계가 교환에 어떠한 영향을 미치는지 등을 파악하고자 하였다. 이를 위해 서울과 수도권에서 중학생, 고등학생, 대학생을 포함하는 청소년 자녀 150명과 어머니 150명을 대상으로 설문조사가 수행되었다. 자료 분석 결과는 대략적으로 다음과 같다. 청소년 자녀와 어머니 사이의 교환은 부정적 자원보다 긍정적 자원을 중심으로 이루어지고 있다 긍정적 자원은 애정을 제외하고는 유형에 따라 비대칭적인 교환이 이루어지고 있다. 긍정적 자원은 대체로 자녀가 더 많이 받는 경향이 있지만. 자원의 가치는 어머니에게 더 높은 것으로 나타난다. 부정적 자원은 교환이 비교적 대칭적으로 이루어지고 있으며, 교환빈도가 높은 자원은 부정적 가치가 약하다. 딸이 아들보다 어머니와 보다 긴밀한 교환관계를 유지하며, 특히 애정과 정보영역에서 그러한 경향이 두드러진다. 자녀의 연령은 교환에 큰 영향을 미치지 않는다.

• 한국콘텐츠학회논문지
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• 제20권8호
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• pp.19-33
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• 2020

본 연구의 목적은 빅데이터 분석 기법을 이용하여 세종시 건설 계획에 대한 여론 변화를 분석하는 것이다. 연구 자료는 세종시 건설 계획과 관련된 한겨레와 동아일보, 한국일보 등 언론사의 신문기사이다. 세종시 건설 계획은 신행정수도, 행정중심복합도시, 세종시 수정안 등 3개 시기로 구분되었다. 분석 방법은 파이썬과 Gephi 0.9.2 프로그램을 활용한 빈도분석, 감성분석, 사회연결망분석이다. 세종시 건설에 따라 각 신문사의 쟁점에 대한 변화가 있었다. 첫째, 빈도분석 결과, 한겨레의 키워드는 세종시 건설 시기에 따라 찬성-찬성-반대의 특성을 나타내고 있었다. 동아일보는 반대-반대-찬성의 입장을 갖는 것으로 분석되었다. 한국일보는 반대-찬성-반대 경향을 갖는 것으로 분석되었다. 둘째, 감성분석 결과, 각 언론사는 논조의 특성이 변화되고 있었다. 한겨레는 긍정-긍정-부정 논조 특성을 보이고 있었고, 동아일보는 부정 - 부정 - 긍정으로 변화되었다. 한국일보는 부정-긍정-부정으로 변화되었다. 셋째, 사회연결망분석 결과는 다음과 같다. 각 언론사는 세종시 건설 시기에 진보와 보수, 중도 등 정치적, 이념적 특성에 따라 변화를 보이고 있었다. 한겨레는 지역균형발전에 초점을 맞추고 있었으며, 동아일보는 보수의 의견을 대변하고 있었다. 한국일보는 세종시 건설 시기에 여·야가 대립하는 이슈에 대해 부각 시키고 있었다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권15호
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• pp.6287-6293
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• 2014

Background: Invasion of breast cancer cells into blood and lymphatic vessels is one of the most important steps for metastasis. In this study the prognostic relevance of lymphangiogenesis and lymphovascular invasion (LVI) in breast cancer patients was evaluated in terms of survival. Materials and Methods: This retrospective study concerned 518 breast cancer patients who were treated at Department of Surgical Oncology, Saroj Gupta Cancer Centre and Research Institute, Kolkata-700063, West Bengal, India, a reputed cancer centre and research institute of eastern India between January 2006 and December 2007. Results: The median overall survival and disease free survival of the patients were 60 months and 54 months respectively. As per Log-rank test, poor overall as well as disease free survival pattern was observed for LVI positive patients as compared with LVI negative patients (p<0.01). Also poor overall as well as disease free survival pattern was observed for perineural invasion (PNI) positive patients as compared to PNI negative patients (p<0.01). Conclusions: From this study it is evident that LVI and PNI are strongly associated with outcome in terms of disease free as well as overall survival in breast cancer patients. Thus LVI and PNI constitute potential targets for treatment of breast cancer patients. We advocate incorporating their status into breast cancer staging systems.

• 응용통계연구
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• 제22권6호
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• pp.1289-1300
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• 2009

표본추출 비용의 절감을 위해 흔히 사용되는 이중표본추출방법은 대부분의 표본들이 2종류의 오류에 의해 오염이 되어 있어 통계적 분석이 상대적으로 용이하지 않다. 특히, 비율의 추론을 위한 중요한 분석 도구인 구간추정은 현재까지 우도추정량의 정규근사에 의존하는 Wald 방법만이 알려져 있으나 Wald 신뢰구간은 포함확률의 근사성 등에서 많은 문제가 있다는 것이 여러 연구에서 확인되고 있다. 본 연구에서는 이중표본추출에서 Wald 신뢰구간의 문제점을 파악하고 이에 대한 대안으로 Agresti-Coull 유형의 신뢰구간을 제시한다.

• 디지털융복합연구
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• 제17권4호
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• pp.87-94
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• 2019

본 연구는 조직 내 개인들의 컴페션 행동들이 조직 수준의 기업의 사회적 책임(CSR)에 어떻게 영향을 미치는가에 대한 이론적 모델을 세웠다. 이론적 모델은 다른 직원의 고통에 반응하여 제공하는 직원들의 컴페션 행위가 조직의 긍정적 또는 부정적 조직 정체성을 일으키고, 더 나아가서 기업의 CSR 활동에 영향을 미칠 것으로 개념화했다. 즉, 조직 구성원들의 가슴에서 일어나는 진실한 컴페션은 긍정적 조직 정체성을 일으켜 자발적인 CSR을 하게 되고, 외부의 압력 등에 의해서 어쩔 수 없이 하게 되는 가짜 컴페션은 부정적 조직 정체성을 일으켜 소극적인 CSR을 하게 된다. 본 연구는 CSR의 선행변수로써 조직 내 개인들의 컴페션 행위와 이를 통해 발전한 조직의 정체성으로 보았다.

• 정신신체의학
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• 제5권1호
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• pp.31-42
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• 1997

This study was aimed to investigate dysfunctional attitudes, stress coping strategies and depressive symptoms in psychiatric patients. The subjects of this study consisted of 210 patients(138 schizophrenic patients, 29 depression patients, 43 alcohol dependence patients) according to DSM-IV criteria. Futhermore, the instruments were K-BDI(Beck Depression Inventory-Korean version), DAS(Dysfunctional Attitude Scale) and multidimensional coping strategy scale. The results were the following. 1) There were statistically significant correlations between depressive symptoms and dysfunctional attitudes in psychiatric patients. 2) In terms of coping strategies, there were positive correlations between depressive symptoms and focus on and venting emotions, accommodation, active forgetting, self-criticism, positive comparison, fatalism, passive withdrawal. Whereas, there was significant negative correlation between depressive symptom and active coping. 3) In terms of coping strategies, there were significant correlations between dysfunctional attitudes and focus on and venting emotions, active forgetting, self-criticism, positive comparison, fatalism, passive withdrawal. 4) Depression groups reported significantly higher BDI scores than schizophrenia groups. 5) In depression groups, DAS scores were significantly higher than those in schizophrenia groups. 6) In terms of coping strategies according to diagnosis, there were significant differences in venting emotions, active forgetting and self-criticism. As for venting emotions, alcoholic groups were scored significantly higher than schizophrenic groups. As for active forgetting, depression groups were scored significantly higher than schizophrenic groups. In self-criticism, depression groups and alcohol dependence groups reported significantly higher scores than schizophrenic groups.

• 의학교육논단
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• 제13권2호
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• pp.25-37
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• 2011

Purpose: Core competencies for becoming a good physician have been the focus of recent discussion. Understanding students' state of mind should be included in this analysis. Thus, the purpose of this study was to review recent research papers on subjective well-being in medical education and propose some suggestions. Methods: A selective search was conducted of the literature that has been published since 2000 in the Medline, Riss4U, ERIC, and KoreaMed databases using the search terms "happiness", "subjective well-being", "satisfaction", and "stress". Thirty seven studies were included in this review. Each was categorized according to 3 subjects (satisfaction, positive affect, negative affect). Results: Most studies showed relatively high levels of distress in medical students, which was related to academic worries. Although medical students were under a great deal of distress, they regarded help-seeking behavior for their distress as weakness or something negative. Conclusion: To decrease medical students' distress and sustain their well-being, there should be a change in students' awareness through curriculum, teaching methods, and coping strategies in medical education.