프리즘 조명기구의 배광 메커니즘 모델링 및 최적화 기법의 적용 연구

최안섭,김철한 대한건축학회 2004 대한건축학회논문집 Vol.20 No.7

The dome pendant prismatic luminaire is recently used in commercial and industrial high-bay applications where quality light levels and energy savings are imperative. In addition, it is satisfied with various luminous intensity distrbutions as well as aesthetic designs. Despite these advantages, up to now, most of luminaire designers have only concentrated their attention on the design matters without optical consideration. Even if they know accurate optic a calculation process, it's difficult to produce prismatic luminaire with luminous intensity distribution required in a space, because the design process is made by much trial and error. The process is also required much time to design. μ-GA is one of the improved form of GA, which has been used to find an opimum solution, to reduce iteration and computing resources by using small populations. Therefore, the purpose of this study is to introduce candlepower distribution model of dome pendant prism luminaire and to develope a design algorithm that is able to find an optimum design solution of the luminaire using μ-GA.

조세부담의 수평적 공평성 측정치의 개선에 관한 연구

전규안,김철환 숭실대학교 사회과학연구원 2007 사회과학논총 Vol.9 No.-

조세부담의 수평적 공평성과 관련된 선행 연구에서는 계산이 간편한 변동계수를 이용하여 수평적 공평성의 정도를 측정하여 왔다. 본 논문에서는 변동계수의 문제점을 지적하고 새로운 측정지표인 변동계수비율을 제시하였다. 1991년부터 2004년 말까지 유가증권시장에 상장된 제조기업을 대상으로 변동계수를 대체할 대안으로 변동계수비율을 이용하여 수평적 공평성을 분석한 결과는 변동계수를 이용한 결과와 차이를 보이고 있다. 본 논문의 구체적인 주요결과는 다음과 같다. 첫째, 선행연구에서는 조세부담능력이 낮은 집단일수록 변동계수가 커서 수평적 공평성이 달성되지 않고 있음을 보여 왔으나, 변동계수비율을 이용하여 수평적 공평성을 분석한 결과는 조세부담능력이 낮은 집단과 매우 높은 집단에서 수평적 공평성이 달성된 것으로 나타났다. 둘째, 변동계수와 변동계수비율 간의 상관계수는 상관관계가 없거나 음의 값으로 나타났다. 변동계수는 조세부담에 대한 변동만을 의미할 뿐 이익의 범위는 고려하지 않았기에 조세부담의 변동계수에 이익의 변동계수의 상대적 측정치를 고려한 변동계수비율을 이용하여 조세의 수평적 공평성을 분석하는 것이 조세의 수평적 공평성에 대한 올바른 결과를 제시해 줄 것이다. In this study we evaluate the limitations of coefficient of variation(CV) for measuring horizontal equity(HE) and introduce the new method for measuring horizontal equity. The limitations of CV are : First, one problem with measuring CV of HE across income groups is that CV tend to increase as the average income of the group decrease, Second, when income groups have unequal width we can not compare the groups for standard deviation can be affected by the interval range. To improve these limitations, we introduce the CV Ratio that CV of tax liability divide by the CV of net income before tax expense. The test sample selected from Korea Stock Exchange during 1991-2004 years. We find that horizontal equity is lower for the middle income groups, an interpretation that differs from most prior studies that use CV measures. This observation has implications that tax policy makers would lead to a focus on middle income taxpayers. This study would contribute to improve in an analysis of HE.

Eisenmenger씨 증후군을 동반한 충수돌기염 천공에 의한 복막염 환자의 마취경험 : 증례보고

천경석,박천희,이철승,이철,안용미,최준석 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.3

Eisenmenger's syndrome includes any condition in which communication between the pulmonary and systemic circulation gives rise to pulmonary vascular disease causing a right to left shunt with peripheral cyanosis, It can occur with complex congenital cardiac malformations, such as septal defect and patent ductus arteriosus. We report a case of a 58-year-old woman with an emergency operation for peritonitis due to appendiceal perforation and Eisenmenger's syndrome secondary to large ventricular septal defect. We carefully performed balanced anesthesia with air-O₂-desflurane-remifentanil. She was transferred to the intensive care unit in intubated state postoperatively and discharged two weeks later without any complications.

스위치드 릴럭턴스 전동기의 전류 파형

안영주,배규환,조철제 釜山工業大學校 1995 論文集 Vol.37 No.-

In this paper, a control method to flow the flat top current into the expected phase of variable reluctance motors(VRMs) is described. Current waveforms of SRM are directly related to the VRM performances. These are greatly influenced by topologies of driving converter. In order to flow the flat top current in the expected phase, conditions of excitation voltage such as the magnitude and on/off timing should be found out. To verify this control method, SRM drive system of a 6/4 pole VRM, controlled rectifier and classic inverter is constructed and tested. The experimental results show that this control method performs well the flat top current.

빈곤과 실업의 원인과 복지정책의 효과

안종범,김철희,전승훈 한국노동경제학회 2002 勞動經濟論集 Vol.25 No.1

본 연구는 빈곤과 실업의 결정요인과 상호관계를 살펴보고, 복지정책의 효과를 분석해 본다. 특히, 빈곤가구와 가구주의 특성, 가구주의 경제활동상태변화 및 이들 변수에 영향을 미치는 결정요인을 분석해 본다. probit 모형과 bivariate probit 모형을 이용한 실증분석 결과, 빈곤의 주된 원인으로 실업이 작용했고, 가구원수, 가구주의 연령 및 저학력 등도 원인으로 작용했음이 밝혀졌다. 사회보험 수급 등을 포함하는 복지정책은 이러한 실업이 빈곤에 미치는 영향을 축소시키는 요인으로 역할하고 있음이 추정 결과 나타났다. Using 3 years of panel data on nearly 3,507 households, the Korea Labor Income Panel Survey(KLIPS) data, the authors measure the determinants of poverty and unemployment, and the extents to which poverty influenced unemployment. The probit analysis of unemployment shows that unemployment probability is lower, when male, lower age and is higher, high-school and over junior college, work duration is over 3 years. The probit analysis of poverty shows that poverty probability is lower, when male, higher education level, longer career, specially unemployment and social insurance is determinants of increasing poverty. Bivariate probit model of unemployment and poverty also provides similar findings to those probit analysis and shows an evidence of the influence of unemployment on poverty along with the positive role of social welfare policy such that social welfare receipt reduces the impact of unemployment on poverty.

편도선 절제술 중 Epinephrine 국소침윤에 의한 심정지와 급성 폐부종 1예

안익순,최준석,박천희,이철승,김원태,임경준 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Hemostasis and a clear surgical field are obtained by the local infiltration of a local anesthetic mixed with epinephrine during tonsillectomy. However, epinephrine may in itself, due to its cardiovascular effect, cause arrhythmia, heart failure, Pulmonary edema, and even cardiac arrest. We describe a 22-year-old patient who developed cardiac arrest due to epinephrine infiltration during tonsillectomy. The patient was resuscitated and recovered without any sequele after intensive treatment.

南韓에 있어서 國家形成上의 特性

安哲鉉 韓國政治學會 釜山支會 1987 부산정치학회보 Vol.1 No.1

MATLAB를 이용한 실시간 피치분석기 피치분석기 구현

박일서,안혜영,김대현,조철우 國立 昌原大學校 産業技術硏究所 2002 産技硏論文集 Vol.16 No.-

This paper describes procedures to implement a real-time pitch analyzer using Matlab. Matlab is a multi-purpose signal-processing tool. Using this tool real-time analysis tool is implemented. To make it real-time we used data acquisition toolbox which comes with Matlab. Autocorrelation method was used as a basic algorithm. The resulting pitch informations are displayed in two different forms, i.e. instantaneous pitch plot and pitch track. V/UV decision is performed using zero crossing rate and energy informations based on 500 utterances.

환경관련 부서 공무원의 환경교육 분석 및 개선방안 연구

안철민,남영숙 한국교원대학교교육연구원 2006 敎員敎育 Vol.22 No.3

이 연구는 환경정책의 수립 및 집행을 담당하는 공무원의 환경교육에 관한 인식 및 교육훈련 실태를 조사 분석하여 공무원의 환경교육훈련 개선을 위한 기초 자료로서 활용할 수 있도록 하는데 그 목적이 있다. 연구방법은 문헌연구와 설문조사방법으로 진행되었으며, 조사 대상은 중앙 및 지방 환경관련부서에서 환경과 환경문제와 관련된 정책수립 및 업무를 수행하는 공무원 279명을 대상으로 하였다. 조사도구는 '환경문제에 대한 인식' 영역 4문항, '환경교육에 대한 인식' 영역 6문항, '환경교육훈련의 실태 및 문제점' 영역 13문항, '환경교육훈련의 개선방안' 영역 4문항 등 총 27개 문항으로 구성하였다. 이 연구를 통하여 얻어진 연구결과는 다음과 같다. 첫째, 환경문제에 대한 인식을 살펴보면 환경관련부서 공무원들은 전반적으로 환경문제 및 환경문제의심각성에 대한 인식 수준이 높았으며, 환경보전은 인간과 환경과의 조화를 통하여 이루어질 수 있다는 견해가 많았다. 둘째, 환경교육에 대한 인식 면에서는 공무원에 대한 환경교육이 매우 필요하다고 인식하고 있었으며 환경교육에 대한 참여 의지도 매우 높은 것으로 나타났으나 현실적으로는 공무원에 대한 환경교육이 제대로 이루어지고 있지 않다는 응답이 많이 나왔다. 셋째, 환경교육훈련의 실태 및 문제점에서는 환경교육을 받은 경험이 있는 공무원이 63.4%로 그 비중이 그다지 많지 않았으며 환경교육을 받은 기관으로는 교육훈련기관이 가장 높게 나타나 대부분 교육훈련기관을 통하여 환경교육을 받고 있는 것으로 나타났다. 환경교육훈련의 교육과정 및 내용에 대하여는 그다지 만족하고 있지 않는 것으로 나타났으며 그 이유로는 전문교육의 부족을 첫 순위로 뽑고 있어서 전문분야의 전문적인 교육프로 그램의 확대 · 신설이 필요함을 알 수 있다. 이상의 연구결과에 의거하여 환경행정의 원활한 수행을 위하여 공무원 환경교육을 제고시키기 위한 개선방안으로는 다음과 같다. 첫째, 환경관련부서 및 일반 공무원들의 충실한 환경교육을 위해서는 환경교육훈련기관 및 교육인원의 대폭적인 확대가 매우 필요하다. 둘째, 환경교육훈련의 교육과정 및 내용은 실제 업무에 적용 · 응용할 수 있는 실습, 체험 위주의 우수한 전문적인 교육 프로그램을 개발하여 환경관련부서 공무원의 전문성을 신장시킬 수 있도록 하여야 할 것이다. 셋째, 체계적이고 효과적인 환경교육을 위하여 환경교육을 종합적으로 통합ㆍ관리할 수 있는 전문적인 환경교육연구센터(가칭)의 설립이 필요하다 하겠다. The object of this research is to analyze the cognizance and state of environmental education of government officials who are in charge of forming and enforcing environmental policies, and using the data as a basis to improving environmental education and training. The research was conducted by documentary investigation and surveying, and the targets were 279 government officials working in environment-related authorities of the central and district governments. Documentary research functioned as a base and they were verified by experts of environmental education, according to the appropriate objects set by the researcher, and then a preliminary examination was conducted to modify, supplement and develop them. The questions that were used in the research were consisted of 27 questions; 4 questions on 'cognizance of environmental problems', 6 on 'cognizance of environmental education', 13 on 'current conditions and problems of environmental education', and 4 on 'reformation schemes of environmental education'. Outcomes that were derived from this research is as the following. First, the cognizance of government officials on environmental problems and its seriousness was high, and there were several opinions that conservation can be accomplished by a harmony of human beings and the environment. Second, many officials recognized environmental education as a very important matter and had strong will to participate in those, but in reality these educations weren't being operated enough. Third, the proportion of people that had received environmental education was only 63.4%, and the institution where they received the most education was the education training institution, and so it was revealed that most education was attained through education training institutions. The satisfaction about the curriculums and contents of the education wasn't very high. Based on the above outcomes, the reformation schemes of environmental education to raise the efficiency of environmental administrations, are as the following. First, the expansion of education facilities and educational personnel is needed to supply sufficient environmental education to government officials working in environment-related authorities. Second, the curriculum and contents of the education must be adjusted to practical affairs, by developing professional education programs including actual training and activities focussed on gaining experience, so it can be applied and put into use. In this way the specialty of the government officials being educated will increase to some extent. Third, to pursue more systematic and effective environmental education, a tentatively named, an Environmental Education Research Center must be established to supervise and unite the education system synthetically.

장기간의 40분 달리기 운동이 비만학생의 호흡순환능력과 혈청 지질에 미치는 영향

박철호,고봉민,박은경,우상헌,안민호 동아대학교 스포츠과학연구소 2000 스포츠科學硏究論文集 Vol.18 No.-

The purpose of study was to investigate the effect of 12wks before and after running exercise of obsese in D high school in Pusan city, exercise group(7) performed 12wks running exercise and control group(7), before and after subjects performed the maximal exercise test on treadmill's 12wks running exercise. Through the comparision and analysis of change respiro-circulatory and serum lipids the results of this study were as follows. 1. In 12wks before and after running exercise, physique and body composition of exercise group was found to have a great decrease in %Fat(6%), Fat(kg)(6%), Triceps(7%) and to have a significant in crease in %LBM(6%). 2. Respiro-circulatory Capacity of exorcise group at the maximal exercise, was found to have a great decrese in VE(5%), RR(8%), RQ(5%). 3. In 12wks before and after running exercise at rest time, in seam lipids of exercise group was found to have a great decrease in TC(8%), TG(29%), LDL-C(7%) and to have a significant in crease in HDL-C(20%), FFA(74%). 4. At rest time, the control group was found to have a little decrease in TG, HDL-C, LDL-C and to have little change in TC and FFA. 5. In 12wks before and after running exercise at the maximal exercise, in serum lipids of the exercise group was found to have significant decrease in TC(18%), TG(23%) and to have a significant in crease in HDL-C(20%), LDL-C(25%), FFA(23%) and TG and HDL-C were found to have a significant change. 6. At maximal exercise, was found to have little change in the control group.