韓國 住宅 溫突起源에 對한 硏究

황영철 서울大學校 大學院 1964 국내석사

線型決定法을 利用한 總括生産計劃에 관한 硏究

황영철 전남대학교 경영대학원 1980 국내석사

Most managers want to plan and control operations at the broadest level through aggregate plans and programs that bypass the details involved in producing individual product or service, and scheduling facilities and workers. Under these circumstanses, the linear decision rule (LDR) as a part of aggregate production planning was developed in the early 1950s by Holt, Modigliani, Moth, and Simon of the Carnegie Institute of Technology. This method aims to derive linear equations or "decision rules" that can be used to specify the optimum production rate and workforce level over some prescribed production planning horizon. The objective of this study is to minimize the expected value of total cost(C_N= Regular payroll costs+Hiring and layout cost+overtime cost+Inventory costs) In this paper the aggregate production planning is explored extensively, and the optimal (i.e., minimum expected cost) decision rules are derived for a quadratic cost functions:inventory, overtime and employment cost, and the numerical coefficients of the rules are computed for any set of cost parameters. The data wers collected from S Tire Company for 1979. LDR model is one of optimization methods. If t w decision rules are once derived, It is quite simple to apply LDR. In addition, the model is dynamic and representative of the multistage kind of system. On the other hand, three major drawbacks of LDR are as follows: First, there is a severe limitation in itself because its application is restricted to quadratic cost relationships. Second, there is some difficulty in obtaining the cost information from the firm's operations. Third, Since there are no limitations on the variables, prcduction rate and work force levels may be negative. In conclusion, decision criteria can be adequately approximated by quadratic functions, and LDR redulted from those decision criteria would be applied to a wide range of decision making problems beyond the production scheduling problem.

수도관차압을 이용한 마이크로 튜블러수차의 최적설계법에 관한 연구

황영철 한국해양대학교 2009 국내석사

The world is now facing a serious energy problem. Mass consumption of fossil fuel such as oil and coal causes global warming and the environmental problems due to acid rain. To deal with this problem, the hydropower should occupy the attention of the electric power generation systems as clean and cool energy sources with highest density. However, suitable turbine type is not determined yet in the range of micro hydropower(less than 100kW) and it is necessary to study for the effective turbine type. According to the recent study results related to the small hydropower development, wasted energy by pressure reducing valve at the end of the pipeline can be extracted by using a small hydropower turbine. Main concept of using the small hydropower turbine is based on using the different water preassure levels in pipe lines. A propeller type hydropower turbine, which is called as tubular turbine, has been used in order to use this renewable differential pressure energy. Conventionally, tubular turbine has been used in the range of relatively low head of below 10m. However, in order to widen the operating range of the turbine, the purpose of this study is focused on the developing a new design method of the tubular turbine which can be used in the range higher than the head of 10m. Moreover, this study is aimed to propose a optimum design method which can be applied to the design of the tubular turbine using differential pressure in the water supply system. The reliability of the proposed design method can be acquire by theoretical analysis , CFD analysis and experiment for a tubular turbine model. According to the present study, the results are obtained as followings. (1) Operational range of tubular turbine head using differential pressure in the water supply system can be extended to over 10m by the adoption of variable vane angle of the turbine runner. (2) Best turbine efficiency by an opening angle of the runner vane, which is estimated by optimum design method, agrees well with the result of CFD analysis for the tubular turbine efficiency. (3) In the head range over 10m, optimum operational condition can be obtained by using 4 pieces of runner vane according to the present design method. (4) Similarity law of the tubular turbine performance can be confirmed by the two turbines, which are designed by the present optimum design method. The design points of the turbines are flow rate Q=0.215㎥/_(S), effective head H=15m for the actual sized turbine and flow rate Q=0.1043㎥/_(s), effective head H=2.59m for the turbine model. (5) Application of servo motor for the variation of runner vane opening angle allows to extend the operational condition of the tubular turbine for the expected small hydropower resources.

효율적인 P2P 스트리밍 서비스를 위한 다중 소스 전송기법에 관한 연구

황영철 청운대학교 정보산업대학원 2009 국내석사

In P2P(Peer to Peer) network model, peer nodes of same class play the roles of client and server simultaneously without having separate client or server. The node that is being used as a client can perform the role of server and client at the same time. P2P is being applied to and used in various fields including file sharing such as Napster, distributed processing such as SETI Project, and electronic business transaction between enterprises. Also, recently, P2P systems are increasingly being used in multimedia streaming services. The peer that wants to use streaming service can use the service from another peer that has the multimedia data, not from the server. This model has the advantage of improving the QoS of streaming service by solving the problem of existing server-client model: concentration of traffic load of streaming request and response at the server. However, sudden secession of peer that was transmitting data and abnormalities of loop can terminate the service. Many studies have been carried out to solve these problems but most of them were about the secession of peers and they did not take the frequent changes of loop into account. This study suggests effective distributed transmission method by using distributed transmission of data from multiple peers and the values of link status of loop measured from transmitted data. Chapter 2 of this study deals with related studies, Chapter 3 is the design of the system suggested in this study, Chapter 4 is the implementation of the system, and lastly, Chapter 5 is the conclusion.

특발성 척추측만증 환자에서 안면 비대칭 양상에 관한 연구

황영철 원광대학교 2009 국내박사

사춘기 전에 시작되어 성장과 함께 심해지는 청소년기형 척추측만증(idiopathic scoliosis)환자의 안면비대칭에 관한 특성을 척추전장 방사선사진과 정모두부 방사선사선 계측사진을 이용하여 관찰하였다. 정형외과의사와 교정의사에 의해 검진된 남성 22명 여성 64명의 청소년이 본 연구 대상으로 평균 연령은 13.9세(13세˜17.6세)였다. 척추만곡, 어깨 기울어짐 및 안면비대칭의 관련성을 계측 분석하여 ANOVA와 함께 Tukey 사후분석을 시행하여 군 간차이를 확인하였다. 방향성 분석을 위해서는 각 계측치마다 교차분석을 시행하였다. 계측치간 상관성을 알아보기 위해서 Pearson’s correlation analysis을 시행하여 다음과 같은 결과를 얻었다. 측만 각도가 큰 중증군(콥스각 40°이상)에서 유의하게 ANS-Me각이 컸다. 측만 양상 중 이중흉추만곡(thoracic double curve)군에서 T1 tilt가 유의하게 컸으며 ramus length difference도 컸다. 주만곡 첨부, 어깨 기울어짐 및 안면 비대칭의 방향은 서로 연관성이 없었으나 T1 tilt는 어깨 기울어짐의 방향과 유의하게 같았다. ANS-Me각은 콥스각, T1 tilt와 유의한 상관관계를 보였고 ramus length difference는 어깨 기울어짐과 유의한 상관관계를 보였다. 측만각도나 양상은 어깨 기울어짐과 관련성이 없었으나 T1 Tilt는 어깨 기울어짐과 관련성이 있다. 측만각도가 큰 환자에서는 턱끝편위가 초래될 수 있으며 어깨가 기울어진 환자에서는 하악각 부위에서 비대칭적인 소견을 보일 수 있다. Idiopathic scoliosis is an orthopedic condition with faulty posture. It might also be associated with head posture, occlusion and facial asymmetry. The aim of the study was to investigate the correlation between facial asymmetry, shoulder imbalance and idiopathic soliosis. There were 86 adolescents (male: 22, female: 64) in the study and average age is 13.9(13˜17.6). Inclusion criteria were age more than or equal to 13 years, no prior spine surgery. Each of the 86 adolescents underwent whole spine standing anteroposterior radiography and frontal cephalogram. Spine parameters included Cobb's angle, T1 tilt and curve type. Shoulder parameters included coracoids height difference, clavicular angle. Facial parameters included maxilla height difference, ramus length difference, ANS-Me angle. To determine the statistically significant correlations between parameters, ANOVA, Tukey's post hoc test, Cross tubulation analysis and Pearson's correlation analysis was applied. ANS-Me angle of severe group was higher than other groups(P<0.01). Thoracic double group showed higher T1 tilt(P<0.01) and ramus length difference(P<0.05) than other group. In deviation apex of curve, shoulder imbalance, facial asymmetry had no correlation but T1 tilt and shoulder imbalance had correlation(P<0.05). ANS-Me angle had significant correlation with Cobb's angle and T1 tilt(P<0.01). Ramus length difference had significant correlation with shoulder parameters(P<0.01) but Cobb's angle had no significant correlation with shoulder parameters. Scoliosis patients with severe Cobb's angle might have asymmetrical features in chin and patients with shoulder imbalance might have asymmetrical features in ramus.

기독교대한성결교회 선교정책의 역사적 발전에 관한 연구

황영철 서울신학대학교 2012 국내석사

This paper investigated historical development stages of the mission policy of Korea Evangelical Holiness Church, evaluated the policy and presented a future development. This evaluation and future outlook particularly focused on two pillars of the mission policy (Overseas Missions Committee and mission fields) and their roles. This paper proposed 3 historical development stages of the mission policy, ‘formation, expansion, and complement of mission policy’ based on the analysis of the mission policy of KEHC; and proposed another 3 development stages of policy-driven mission as ‘outset, settlement, and complement of policy-driven mission.’ This paper proposed 8 arguments on the KEHC mission policy as below. First, the expression of ‘as a supplementary measure’ should be deleted from ‘Social Welfare and Reformation’ policy, which is the fourth policy of the foreign mission general policy. Second, development of mission policies directly related to missionaries is necessary. Third, OMC should prepare for the revitalization of regional mission department and the current globalization of Evangelical Holiness Church. In particular, experts on mission works should be trained and employed. Fourth, mission fields should be regarded as a main body of the mission policy. OMC should help the mission fields develop mission policies more actively, and investigate and adopt a mission policy which fits with individual mission field. Fifth, OMC should develop mission policy seminars and regional mission strategy round tables into periodical meetings. Sixth, a white paper which reports on mission works of each country should be periodically published. Seventh, OMC should arrange, organize and store documents which are produced from mission policy seminars and regional mission strategy round tables. Last, OMC should make an agreement with mission field churches which are short of pastors so that OMC can send Korean missionaries as their pastors.

도시 내 Green Network 구성을 위한 건축 디자인에 관한 연구

황영철 경희대학교 대학원 2003 국내석사

Separation of Racemic Compounds on Hydroxypropyl-b-cyclodextrin 3-triethoxysilylpropylcarbamate-Coated Zirconia in HPLC

황영철 영남대학교 대학원 2003 국내석사

현재 정지상 지지체로 널리 사용되는 실리카에 cyclodextrin 유도체를 실리카 표면에 부동화시켜 만든 키랄 정지상이 좋은 거울상 선택성을 가진다는 사실이 잘 알려져 있다. 본 연구에서는 흔히 쓰이는 실리카 지지체 대신에 열적, 기계적, 화학적 안정성이 실리카 보다 뛰어난 지르코니아 지지체를 사용하였다. Hydroxypropyl- β-cyclodextrin 3-triethoxysilylpropylcabarmate-coated zirconia 정지상을 만들고, 여러 가지 2,4-dinitrophenyl 아미노산 이성질체를 역상 액체 크로마토그래피로 분리하는데 키랄 정지상으로 이용하였다. 이 키랄 정지상은 아미노산 이성질체에 대해서 좋은 거울상 선택성을 보여준다. 이동상의 pH 와 유기변형체 함량이 분석물의 머무름과 거울상 선택성에 미치는 영향을 조사하였다. In this work a novel chiral stationary phase (CSP) was prepared by immobilizing hydroxypropyl-β-cyclodextrin 3-triethoxysilylpropylcabarmate on zirconia. Zirconia is superior to silica as the solid support in thermal, mechanical and chemical stability. Hydroxypropyl-β-cyclodextrin 3-triethoxysilylpropylcabarmate was statically adsorbed onto zirconia and used as chiral stationary phase for separation of enantiomers of a number of 2,4-dinitrophenyl (DNP) amino acids (AA) in reversed-phase liquid chromatography. The CSP showed good enantioselectivity for the amino acids studied. Effects of the mobile phase pH and content of organic modifier in the eluent on retention and enantioselectivity for the analytes have been investigated. As the pH of the mobile phase increased retention was decreased while enantioselectivities of DNP-AAs essentially remained unchanged. With increasing amount of the organic modifier both retention and enantioselectivities decreased. It is expected that the hydroxypropyl-β-CD-zirconia CSP with high enantioselectivity can be utilized for separation of other types of racemic compounds than DNP-amino acids.

韓國 新聞記者들의 役割志向性과 報道性向에 관한 연구

황영철 경희대학교 대학원 1995 국내석사

엘리트 복싱선수들의 체중감량 시 블랙쵸크베리 섭취가 항산화제 효소 및 면역기능에 미치는 영향

황영철 高麗大學校 醫用科學大學院 2014 국내석사

ABSTRACT Impact of Black Chokeberry Intake on Antioxidant Enzymes and Immunity while Elite Boxers are on a Weight Reduction program Hwang,Young Chul Department of Sports Medicine Graduate School of Biomedical Science Korea University Supervised by Prof. Kim, Myeong Gi Present study is to investigate an impact of black chokeberry on the lipid peroxidation, antioxidant enzymes and immunity for elite boxers while they are trying to loose weight. 13 male elite boxers are subjected to two weeks of weight reduction training, assigned randomly in two groups: an experimental group taking the black chokeberry and the placebo group. The impact on the lipid peroxidation, antioxidant enzymes and immunity are as the followings: 1. There was no significant difference in MDA concentration in blood between the two groups during the two weeks of weight reduction training while the experimental group showed a significant difference in MDA concentration after the training by approximately 12.89% decrease (p=0.008). 2. here was no significant difference in GPX and SOD concentration in blood between the experimental and control groups in two weeks while the control group showed a significant difference in SOD concentration in blood after the training by approximately 11.45% increase (p=0.036). 3. There was no significant difference in immune globlin (IgG, IgA, IgM) between the two groups in two weeks while the experimental group showed a significant difference in IgA concentration in blood after the training by approximately 5.92% increase (p=0.045). Therefore, two weeks of antioxidant intake does not make any significant difference between two groups, however, since the experimental group taking the black chokeberry showed a slightly significant decrease in MDA and a slightly significant increase in IgA indicated that taking antioxidant while under a intense training and weight reduction can be performance-enhancing for athletes. Changes in SOD increased in the control group unlike most of the previous studies indicates more studies are in need. Athletes who exercise regularly or not regularly, or athletes who regularly controls weight or not shall be added to subject groups of athletes to evaluate SOD concentration in blood to validate the results.