St. Thomas Aquinas의 存在(esse)에 대한 硏究

채,이병 西江大學校 1988 국내석사

Die Lehre des Thomas von Aquin über den Frieden

채이병 Universität zu Köln 2001 해외박사

고강도 광조사기의 조사방법이 복합레진의 중합정도에 미치는 영향

이병채 조선대학교 2004 국내박사

The aim of this study was to investigate the effect of composite resin components on proliferation and glucan synthesis by cariogenic bacteria, Streptococcus mutans and Streptococcus sobrinus. Light curing pit and fissure sealant was chosen for evluation. Specimens were eluted in deionized water for 10 minutes, 1, 12, and 24 hours. Extracts of specimens were diluted into 1/2, 1/4, and 1/8 with addition of BHI broth and BHI-YS. Bacteria were cultured in media included eluted components, and measued optical density(A_(600)) The following results were obtained 1. 1/4 concentration of elutes for 10 minutes significantly inhibited the proliferation of S. mutans, whereas 1/2, 1/8 concentration of elutes stimulated it. Also, exacts, especially 1/2, 1/4 concentration, for 1 hours stimulated it. But exacts for 12, 24 hours had not effects on the proliferation of S. mutans. 2. 1/4 concentration of elutes for 10 minutes inhibited growth of S. sobrinus, whereas extrats for 1, 12, 24 hours had not effects on the proliferation of S. sobrinus. 3. Extracts from composite resin stimulated total growth of S. mutans more than growth control group, whereas inhibited it of S. sobrinus. 4. Extracts from composite resin, especially 1/4 concentration of it for 10 minutes increased the formation of water insoluble glucan of S. mutans. But elutes for 1, 12, 24 hours. and 1/8 concentration of it for 10 minutes inhibited it. 5. Except 1/4 concentration of elutes for 10 minutes, extracts decreased the formation of water insoluble glucan of S. sobrinus. 6. Total amount of formated glucan was 3-fold higher in S. mutans than in S. sobrinus.

Essays on Optimal Feasible Taxation

이병채 The Pennsylvania State University 2004 해외박사

In the first essay, we study the following question: For a public good economy where the provision of public goods is to be financed by property taxes collected from individuals, what is the optimal feasible tax mechanism when a social planner is relatively uninformed of the properties of the individuals? Using a Bayesian model, we provide the full characterization of the optimal feasible tax mechanism with two agents and its properties. We find that (i) when the expected total endowment of the economy is relatively low enough or high enough, the incentive compatibility constraint does not bind so that first best taxation can be obtained; (ii) the second best feasible tax mechanism requires a poor agent to pay relatively more than a rich agent, that is, it is regressive ; and (iii) the optimal feasible tax mechanism is increasing in the sense that the agent’s tax payment increases with his endowment. We also provide some interesting comparative statics analyses using the full characterization. For the case of more than two agents, under a mild assumption we give some partial results similar to (i) and (ii) above. In addition, we find the optimal feasible tax mechanism for the corresponding infinitely large economy. The main goal of the second essay is to extend the model of optimal feasible tax mechanism developed in the first essay to a heterogeneous economy in which agents have different income or wealth characteristics. In reality, thereare some distinguishable characteristics which are publicly observable ; minority vs. majority, female vs. male, blue-color vs. white-color, and so on. We provide a full characterization of optimal feasible tax mechanism for such a heterogeneous economy with two agents. In addition to the similar results in the first essay, we find that if the level of low endowment is relatively low, then only the incentive compatibility constraint of a rich minority agent will be binding. Using these characterization results, we present some interesting comparative statics analyses on how the optimal feasible tax schedule will respond to a change in the primitives of the economy. These analyses also explains how the incentive problem of a heterogeneous economy will be resolved effciently under feasibility constraint. The third essay studies the for mation problem of local public good economies from the efficiency point of view when the public goodis financed by local property taxes. Each agent can be distinguishable by publicly observable characteristics, say minority or majority, but has private information about his own endowment. We compare the social welfare, which is the sum of all agents’ utilities, between homogeneous and heterogeneous formations. We find that if the expected endowment of the economy is relatively low, then homogeneous formation is optimal, and otherwise heterogeneous formation is optimal. Also, using simulation method, we show the immigration incentive of each agent, which indicates that a minority agent wants to make a heterogeneous formation while a majority a homogenous one regardless of their endowment size.

부찰제 경매방식의 균형분석

이병채 서울대학교 대학원 1996 국내석사

태권도장 지도자 리더십 유형이 수련만족도와 재등록의도에 미치는 영향

이병채 경희대학교 2012 국내석사

본 연구의 목적은 태권도 지도자의 리더십 유형에 따른 수련 만족도를 분석하고 이것이 재등록과는 어떠한 상관관계를 형성하는지를 파악하여 태권도장경영 활성화를 위한 기초 자료와 태권도 지도자의 질적 향상을 위한 근본적인 방안을 모색하는 것이다. 이를 위해여 2011년 11월 1일∼2011년 12월 31에 서울에 소재한 태권도장 중 10곳을 선정하여 그곳에서 수련중인 초등학생을 모집단으로 선정하였으며, 각 태권도장의 지도자의 도움을 얻어 수련중인 초등학생을 대상으로 편의표본추출법(convenience sampling)을 이용하여, 총 400부의 설문지를 배포하였다. 이 중 회수된 설문지는 382부였으며, 응답 자료 중 이중응답이나 무응답 등 자료처리에 적합하지 않는 36부를 제외한 총 346부의 설문지를 최종 분석에 사용하였다. 연구도구로는 선행연구에서 사용된 문항을 기초로 하여 본 연구에 맞게 수정 보완한 후 사용하였으며, 회수된 조사 자료는 SPSS 17.0프로그램 및 AMOS 18.0을 이용하여 통계 처리한 결과, 다음과 같은 결론을 얻었다. 첫째, 태권도 수련생의 인구통계학적 특성에 따른 태권도 지도자 리더십 유형은 여자 수련생들이 남자 수련생보다 높았고, 학년에 있어서는 고학년보다 저학년이 높았으며 통계적으로 유의한 차이(p<.05)는 없었다. 수련기간은 1년 미만의 수련생보다 오랜 기간 수련한 집단이 보다 높았고, 주당 수련 횟수에서는 지속적인 수련을 하는 집단이 주3회 이하로 하는 집단보다 높았으며, 통계적으로도 유의한 차(p<.05)가 있었다. 둘째, 태권도 수련생의 인구통계학적 특성에 따른 수련만족도에서는 여자 수련생이 남자 수련생보다 수련만족도가 높았고, 학년은 5-6학년 집단이 가장 높았으며, 저학년일수록 수련만족도가 낮았다. 수련기간은 짧을수록 만족도가 높았으며, 통계적으로도 유의한 차이(p<.05)가 있었다. 셋째, 태권도 수련생의 인구통계학적 특성에 따른 재등록 의도는 남자 수련생들이 여자수련생보다 재등록 의도가 높았고, 학년에서는 고학년이 재등록의도가 높게 있으며, 학년이 낮을수록 재등록 의도가 낮았다. 수련기간은 1년 미만이 재등록 의도가 높게 있고, 통계적으로 유의한 차이(p<.05)는 없었다. 주당 수련 횟수는 주4회 이상 수련하는 집단이 주3회 이하로 수련하는 집단보다 재등록 의도가 높았고, 통계적으로 유의한 차이(p<.05)가 있었다. 넷째, 태권도 지도자의 거래적 리더십과 수련만족도의 경로는 기각되었으며, 변혁적 리더십과 수련만족도는 경로계수 값이 .419(t=2.872, p=.004)로 통계적으로 유의하였고, 거래적 리더십은 재등록의도에 경로계수 값이 .498(t=5.830, p=.000)로 통계적으로 유의하다. 변혁적 리더십은 재등록의도에 경로계수 값이 .246(t=2.836, p=.005)으로 통계적으로 유의하였으며, 수련만족도와 재등록의도는 경로계수 값이 .258(t=6.986 p=.000)로 통계적으로 유의한 차가 있었다. The purpose of this study is to analyze satisfaction for training by different leadership types of a taekwondo instructor and understand how this is interrelated with reentrance and, eventually to get basic data for robust taekwondo studio management and figure out fundamental measures to improve quality of taekwondo instructors. For this purpose, we selected elementary school students as parent population out of 10 taekwondo studios located in Seoul from November 1 to December 31 2011. And by help of instructors from taekwondo studio, 400 sheets of questionnaires in total were distributed to elementary school students under training through convenience sampling method. Of these, 382 sheets of questionnaire were collected and after excluding inappropriate 36 questionnaire collections with duplicate answer or no answer, 346 questionnaires were adopted for final analysis. Research was conducted by modifying and supplementing items used in previous studies, and following conclusions have been obtained as a result of statistic analysis using SPSS 17.0 program and AMOS 18.0 for collected data. Firstly, in terms of demographic characteristics of taekwondo trainees, leadership types affect more male trainees than females, while affecting more low grade students than upper grade ones, which shows no statistically significant difference(p<.05). Relevant to training period, leadership types affect more students training for long time than those below one year, and relevant to training frequency by week, continuously-training students are more affected than those with less than three times a week, which show statistically significant difference(p<.05). Secondly, in terms of demographic characteristics of taekwondo trainees, female trainees have more satisfaction for training than male, while 5-6th graders have highest satisfaction. The lower grades, the lower satisfaction they have. Students have more satisfaction with less training period, which shows statistically significant difference(p<.05). Thirdly, in terms of demographic characteristics of taekwondo trainees, males have higher reentry intention than females. Upper grade students show higher reentry intention, and the lower grades, the lower reentry intention they have. Students training below one year have higher reentry intention with no statistically significant difference(p<.05). Relevant to training frequency by week, those training more than four times a week have higher reentry intention than those training less than three times a week, which shows statistically significant difference(p<.05). Fourthly, paths of transactional leadership and satisfaction for training were dismissed, while transformational leadership and satisfaction for training are statistically significant with path coefficient of .419(t=2.872, p=.004). Transactional leadership is statistically significant to reentry intention with path coefficient of .498(t=5.830, p=.000). Transformational leadership is statistically significant to reentry intention with path coefficient of .246(t=2.836, p=.005), while there is statistically significant difference between satisfaction for training and reentry intention with path coefficient of .258(t=6.986 p=.000).

고압가스 저장 및 공급 설비의 다중통신 다기능 성능시험 프로그램 개발

이병채 충남대학교 산업대학원 2013 국내석사

디지털 유방영상의 CAD 알고리즘 구현

이병채 남부대학교 보건경영대학원 2014 국내석사

국문초록 디지털 유방영상의 CAD 알고리즘 구현 이 병 채 지도교수 : 이 상 복 방사선학과 남부대학교 건강에 대한 관심의 증대로 의료영상이 빠르게 증가하고 있으며, 컴퓨터 기술의 발전으로 의료영상의 디지털화가 빠르게 진전되어 PACS가 의료현장에 도입되었다. 이러한 현상에 의한 의료영상 생산의 증가는 의료영상을 판독하여야 하는 영상의학과 전문의의 업무량을 증가하게 하였다. 이러한 추세에 따라 컴퓨터를 이용한 보조 진단의 필요성이 대두되어 의료영상 판독 분야에 CAD라는 용어가 생겨나게 되었다. 본 연구에서는 디지털 X-선 유방촬영장치에 의하여 획득된 영상의 판독을 위한 CAD 알고리즘을 제안하였다. 제안된 알고리즘을 Visual C++로 프로그램하여 실험하였다. 본 연구에 사용한 일곱 샘플영상은 영상의학과 전문의에게 판독을 의뢰한 결과에서도 모두 양성종양 및 유방암으로 판독되었다. 일곱 샘플영상을 CAD 알고리즘으로 실행한 결과 다섯 샘플의 결과는 양성종양 및 유방암으로 확인되었고 두 샘플 영상은 error처리 되었다. 본 연구에서 제시한 알고리즘과 이를 구현한 프로그램을 이용한다면 영상의학과 전문의들의 판독업무에 많은 도움이 될 것이며, 유방암의 조기발견에 크게 기여할 것으로 사료된다.

현장측정기술을 이용한 오염 부지와 방사화콘크리트의 방사능 분포 깊이 분석

이병채 충북대학교 2021 국내박사

In this research, the gamma spectrum in situ measured using a high-purity germanium(HPGe) detector, and the radiation source depth and the radioactivity distribution depth were analyzed by applying the PTC (Peak to Compton) method. The correlation between the 137Cs, 60Co, and 152Eu radiation source depth and the PTC net counting rate ratio(Q) was derived experimentally. As a result of comparing the experiments of a single source and a mixed source, the average relative error of 60Co and 152Eu is less than 3%, and the average relative error of 137Cs is less than 10% because the analysis gamma energy is low. As a result of comparing the experiment and simulation of radiation source, the average relative error was 7%. The difference in the PTC results with changes in radioactivity was less than 3% of the average relative error of 137Cs and 60Co, and the average relative error of 152Eu was less than 13% due to the low emission rate. The radioactivity distribution depth of 137Cs was analyzed using the PTC method. The experimental results of various radioactivity distribution depths of the 137Cs source agree with the results of an MCNP simulation within 2% relative error. In order to use the PTC method in the contamination sites, the impact of the surface area change of the measurement target was evaluated by an MCNP simulation. The developed method was applied to contamination sites and the results were compared with the sample analysis, revealing a relative error of less than 18%. In order to reduce the measurement uncertainty due to the background spectrum, it was recalculated using the background spectrum simulation method. As a result of comparing the recalculated result and the sample analysis result, the accuracy was improved compared to the existing PTC method within 6% of the average relative error. The experimental results of various radioactivity distribution depths of the 60Co and 152Eu source agree with the results of an MCNP simulation within 2% relative error. In order to use the PTC method in the activated concretes, the impact of the material composition, surface area, and density change of the measurement target was evaluated by an MCNP simulation. As a result of analyzed 60Co by applying the PTC method for the activated concrete in the accelerator facility, the analysis accuracy was very low because there was a steel bar inside the concrete. As a result of analyzed the energy of 779 keV of 152Eu, the right wall showed the highest accuracy with a relative error of 2.68% from the sample analysis result. The front and left walls showed results within 20% of the relative error. In case of the cross-contamination and biased data of the samples was ignored, a result of the relative error was reduced to to less than 16%. The results of this research will be useful in quickly and accurately evaluating the radiation source depth and radioactivity distribution depths of contamination site and activated concrete for decommissioning of nuclear facilities.

東武 李濟馬 四象醫學과 哲學에 대한 고찰

이병채 원광대학교 대학원 2006 국내석사