실내 멀티미디어 데이터 전송환경에서 OFDM/DS, MC-CDMA 시스템 성능분석

김철순(金哲淳) 인천대학교 정보통신대학원 2006 국내석사

初等學校 自然科 및 設備 基準에 關한 硏究

김철 한남대학교 2000 국내석사

複式學級에서 個別化敎授-學習의 向上 方案에 關한 硏究

김철 전주대학교 2001 국내석사

□ The purpose of this study is to explore the effects of the individualited teaching & learning in a multiple grade class. Specifically, the objectives of this study could be summarized as follows: □ 1. To explore the method of operation system for individualited teaching & learning in a multiple grade class. □ 2. To explore the method of curriculum operation for the improving of individualited teaching & learning in a multiple grade class. □ 3. To explore the method of individualited learning sheet development for the improving of individualited teaching & learning in a multiple grade class. □ This study included 6 children, 20 teachers. These children and teachers belonging to 8 school (2 branch school include) in K city. □ The measurement instruments of this study were self-making Questionnaire by 「A Standard Test for School Management Evaluation」 □ The statistical analysis method of this study carried out frequency ranking analysis, t-Test by 「SPSS program for windows(9.0)」 □ The findings of this study were as follows: □ 1. There is need to do prescriptive guidance of individualited learning process in a instruction design for ITL. □ 2. There is need to do development of multiple instruction plan in teaching & learning of multiple grade class. □ 3. There is need to do operation of nongrade curriculum in teaching & learning in a multiple grade class. □ 4. There is need to do educate and training for the class teacher of multiple grade class. □ 5. There is need to do organize by neighboring grade in class organize of multiple grade class(1-2 grade, 3-4 grade, 5-6 grade). □ 6. There is need to do compound of a subject as follows: compound of same subject & same textbook, same subject & other textbook. □ 7. There is need to do individualited learning instruction in management of multiple grade class. □ 8. There is need to do performance evaluation and inquiry learning method in teaching & learning in a multiple grade class.

사용자의 요구를 반영한 공장기숙사 리모델링 기획 프로세스 제안 : user demand based planning process for plant dormitory remodeling projects

김철 서울시립대학교 2011 국내석사

Because of rapid industrialization after 1980's, a lot of factories were planned and completed In korea. Accompanied by this situation, a rapid increase of residents in factory complex has needed more construction of new dormitories in a short time. A short period time of dormitory construction has resulted in a lot of problems and most dormitories has required to be remodelled earlier than their persisting period. The objective of this project is to improve the exciting process that carries forward skipping resident requirements and propose the new process in the beginning step to draw the optimized work scope and budget plan reflecting reasonably the opinions of facility department that understands exactly the resident needs and the deteriorated condition and the budget department that requires validity of the investment budget. Some problems resulted from the investigation of the existing process and some cases as below. First, activities of each step were not enough such as goal setting, preliminary survey, field survey, validity check and resident questioning. Second, the opinions of the persons in charge of facility construction and management who understands exactly the resident needs and the deteriorated condition of dormitory were not reflected Third, after the completion of remodeling, the dissatisfactions of all concerned were opened. To establish the procedure in the planning step and reflect the requirements of construction and budget department correctly, the improvement scheme as follows. First, The activities of goal setting, preliminary survey, field survey, validity check and resident verification got stipulated and check list of each activities got clarified. Second, the phase of expert interview for a fundamental and rational improvement and mock-up construction for verification of resident requirements got suggested. Third, the five steps of planning process to draw the optimized work scope got suggested. In addition, the check sheet to reflect resident requirements in progress of a project and the verification phase to discuss the alternatives with all concerned got supplemented. Fourth, this thesis was investigated by applying the suggestions to a real dormitory construction project and clarified through interview with residents and experts. I hope that this research paper can contribute to making remodeling projects more effective and satisfactory to residents and other concerned in construction or budget department and activating economical dormitory remodeling by applying the suggestions to others dormitories with similar condition in factory complex. Lastly, the check sheet has limits in reflecting all resident requirements and construction price per pyoung(3.3㎡) has lack of objectivity and validity because of analysing small parts of several completed dormitory remodeling cases. Therefore, more continuous research has to be performed. 1980년대 이후 급속한 산업화로 인한 많은 공장의 증가는 단기간의 공장기숙사 신축으로 이어졌고, 최근에 와서 내구연한이 도래한 기숙사 리모델링이 순차적으로 계획되고 있다. 그러나 공장기숙사의 특수성 때문에 사용자의 의견이 반영되지 않은 일방적인 리모델링 추진이 준공 후 많은 민원과 불만사항의 표출로 문제점으로 대두되고 있는 실정이다. 본 연구는 공장기숙사 리모델링 초기 기획단계에서 사용자의 요구를 생략하고 추진되어 많은 문제점을 나타내고 있는 기존 프로세스를 개선하고, 실제 입주해서 사용할 임직원, 기숙사의 노후 상태를 가장 잘 파악하고 있는 공사담당자 및 공사예산의 타당성을 문제 삼고 있는 예산 담당자의 요구가 합리적으로 반영된 리모델링 공사범위 및 예산을 도출할 수 있는 기획단계의 프로세스를 제안하는데 목적이 있다. 본 연구에서 기존의 기획단계 프로세스의 사례분석을 통하여 공장 기숙사의 리모델링 추진에 있어 목표설정, 예비조사, 현장조사 및 진단, 타당성 평가, 거주자 사전검증 등의 단계별 세부 수행항목이 명쾌하지 못한 이유로 체계적인 리모델링 수행이 어려운 부분과 기획단계에서 리모델링 공사범위 및 항목 도출에 실 거주자 및 기숙사 노후상태를 잘 알고 있는 공사담당자의 요구가 반영되지 않은 관계로 리모델링 완료 후 실질적인 불편사항을 해소하지 못한 실 거주자와 시설관리자의 민원증가 및 투입된 예산의 적정성에 상이한 의견을 보이는 예산담당자의 불만 해소방안을 제시하였다. 본 연구의 결과를 요약하면 다음과 같다. 첫째, 초기 리모델링 추진에서 목표설정, 예비조사, 현장조사 및 진단, 타당성 평가 및 거주자 사전검증 등 각 단계별 사전검토 내용을 제시하였다. 둘째, 노후 기숙사의 근본적인 개선을 위해 전문가의 면담 단계를 추가하였고 사용자 요구사항을 검증할 수 있는 목업(Mock-up) 시공을 제안하였다. 셋째, 리모델링 기획단계에서 합리적인 공사범위 및 항목을 도출하기 위해 기획 프로세스 5단계를 제안하였고, 프로세스 중간에 사용자의 요구를 반영할 수 있는 시트와 도출된 공사범위 및 항목에 대해 관련자가 대안을 선정 및 협의할 수 있는 검증단계를 삽입하였다. 넷째, 제안한 기숙사 리모델링 기획 프로세스와 제안시트를 실제 프로젝트에 적용하여 결과를 확인했으며, 사용자 및 전문가 의견조사를 통하여 적합성과 효용성을 검증하여 결론을 도출하였다. 본 연구를 통하여 실 거주자와 공사담당자 및 예산담당자의 의견이 반영되어 만족도를 높일 수 있는 효율적인 공장기숙사의 리모델링이 수행될 수 있도록 하고, 타 사업장의 동일한 조건의 공장기숙사의 리모델링 추진에 본 기획 프로세스와 제안시트를 적용하여 합리적이고 경제적인 기숙사 리모델링을 활성화시킬 수 있을 것으로 기대 된다. 본 연구에서 제시된 시트의 내용 중 기숙사 리모델링 공사부위 및 항목이 사용자의 요구사항 전체를 반영할 수 없었다는 부분과 공사예산 산출에 적용된 평단가의 경우 기 수행된 일부 자료만을 분석, 적용하여 단가의 타당성 및 객관성이 부족한 부분에 대한 지속적인 연구가 이어져야 할 것이다.

經營解雇制度의 改善에 관한 考察

김철 경희대학교 대학원 2006 국내석사

유연전자소자에 온·습도 환경 설정과 기계적 반복 변형 인가가 가능한 신뢰성 평가 장비 개발

김철 忠南大學校 大學院 2018 국내석사

Repetitive mechanical deformation such as bending and twisting can affect to electrical performance of flexible electronic device, even if very small deformation occurs. Also humidity and temperature conditions deteriorate electrical performance of electronic device. For commercialization of the flexible electronic device, it is important to maintain electrical performance under various mechanical loads and environmental conditions. Recently, many studies are performed related to evaluation of reliability of flexible electronic device under mechanical loads or environmental conditions respectively. Bending is one of the representative mechanical deformation that has been studied in previous researches. However, test equipment was limited to one side bending deformation that can apply one type load as compression or tension. In this study, test equipment capable of applying various loads including both sides bending deformation and implementing environmental conditions was developed. The test equipment can apply various deformations to flexible electronic device. Two single deformations and six complex deformations are different from test methods of previous researches. The test equipment is categorized three types depending on the type of deformation: one is multiple mode capable of applying various loads, another is sliding mode, the other is shearing mode. Motors of test equipment are controlled by TwinCAT3 software based on C/C++, and software is operated in GUI(Graphical User Interface) environment. Before test of applying mechanical deformation, velocity synchronization method was developed for complex deformation using two or more motors. In order to apply uniform bending moment to printed pattern in both sides bending deformation, bending shape was assumed to be an arc. To deform printed pattern as arc shape, mathematical model using geometric properties was proposed, and control parameters of each motor were achieved from this model. Simulation using MATLAB and ANSYS Workbench was performed to verify the effectiveness of proposed model. Also, in oder to predict distribution of stress under mechanical loads, FEM(Finite Element Analysis) was carried out by ANSYS Workbench software. For the evaluation of reliability of flexible printed pattern, various tests were performed under repetitive bending, twisting, and shearing in controlled environmental conditions, and the resistance of pattern was measured at real time. The resistance of printed pattern under both sides bending deformation was measured to be higher than that under one side bending deformation. In both sides bending test of applying same load, as temperature increased the resistance of printed pattern was measured higher, and more crack occurred in surface of pattern. Therefore, both sides deformation and high temperature condition have adverse effect on fatigue strength of the printed pattern related to electric performance. In twisting test of applying same load to printed line pattern at room temperature, as line width of printed pattern decreased and the distance between pattern and rotation axis increased, the resistance of printed pattern was measured higher. Therefore, twisting load has adverse effect on fatigue strength of the printed pattern of fine line. In shearing test of applying different load to printed line pattern at room temperature, as shearing load increased, the resistance of printed pattern was measured higher, and cause of experimental result was verified by FEM simulation. In conclusion, in order to commercialize of flexible electronic device, an appropriate test for evaluation of electrical reliability should be performed in complex conditions combined mechanical load and environmental conditions.

위십이지장 수술에 대한 임상적 고찰

김철 全南大學校 1986 국내석사

위 십이지장 질환으로 1977년 1월부터 1983년 12월까지 7년간 전남대학교 의과대학 부속병원 외과에서 수술을 받은 환자 1,009명중 주로 소화성 궤양 위암 환자 987명에 대해 성별, 연령별, 월별 발생 빈도와 수술적응의 질환별 분포, 수술방식, 수술후 합병증, 수술사망율 술후추적 등을 관찰한 결과 다음과 같은 결론을 얻었다. 1. 질환별 발생분포는 위궤양 313명, 십이지장궤양 174명, 위암 486명, 기타 36명으로 나타났다. 2. 성별 및 연령별 분포는 궤양에 있어서는 남녀비가 12:1, 위암에서는 2:1로 나타났으며, 연령별로는 궤양은 40대와 50대에서, 위암은 50대에서 가장 많이 발생되는 것으로 나타났다. 3. 소화성궤양의 수술적응은 천공, 출혈, 난치, 폐쇄의 순이었다. 4. 수술방법은 위궤양은 위아전절제술 십이지장궤양은 미주신경절단술이 가장 많았으며 위암수술은 근치술이 53.1% 종양절제가 가능한 경우가 85.4%였다. 5. 수술후 합병증은 11.3% 발생하였는데 누출(leakage)이 가장 많았으며 창상감염은 상당히 감소하였다. 6. 수술후 사망율을 보면 위궤양에서는 1.8%이었으며, 대부분 응급수술의 경우였다. 위암에서는 2.2%를 나타냈다 7. 추적 관찰결과 궤양수술후 양호한 경우는 70%였고, 위암의 경우에는 30%에서 전이나 재발이 발견되었다. This report represents a clinical study on the experience with 1009 cases of gastroduodenal diseases which had been treated with surgical intervention at Chonnam National University Hospital from January 1977 to December 1983. The results are as follows : 1. In the distribution of diseases, the gastric ulcers with duodenal ulcers 8 cases and the marginal ulcers 6 cases. The cases of the gastric cancers were measured to be 486, and the other miscellaneous diseases such as acute hemorrhagic gastritis, leiomyoma of stomach,bezoar,injury of the stomach 22 cases. 2. The sex ratio between male and female was 12:1 in peptic ulcer and 2:1 in gastric cancer. 3. In age distribution, the peak incidence was in 5th and 6th decade in gastric cancer. 4. In operative procedure, the most frequent procedure was the subtotal gastrectomy in gastric ulcer and vagotomy in duodenal ulcer. 5. In gastric cancer, radical operative procedures were performed in 257 cases (53.0%). Tumor mass resection was possible in 415 cases (85.4%). 6. Postoperative complication revealed in 57 cases (11.3 %) of peptic ulcer operation and wound infection was rare (1.4%). 7. Of the 501 patients of peptic ulcer which had been treated with operative precedures, 9 patients died, and overall morality rate measured to be 1.8 percent. Eight patients who died underwent emergency operation. 8. Of the 101 patient of peptic ulcer in which poptoperative followup evalutaion based on modified Visick classification was performed, 70 percent of them revealed to be with successful results, and in the 213 cases of gastric cancer, 43.2 percent of the patients showed th successful results.

敎師들이 知覺한 敎育自治制에 관한 硏究

김철 漢城大學校 行政大學院 1992 국내석사

The local educational autonomy in our country can be said to have been enforced to now since the 1945 liberation. Although it has a relatively long history, our educational autonomy is to be said to have been enforced formally in a condition of not enforcing local autonomy before it was revised. According to the request of the times and people's desire, educational autonomy with local autonomy was also amended in 1991 and the new system of educational autonomy has been enforced from then to now. So, this study intends to investigate the right direction and the plan of improvement for the system of educational autonomy by examining how teachers recognize educational autonomy as the local educational autonomy' is enforced. This study applied to the male and female teachers serving in elementary schools, middle schools, and high schools in Kwangju city. The questionnaires were distributed to them and then gathered. And using the SPSS(statistical package for the social sciences) program, the study examined the meaningful level between each group by X² test(Chi-square test) of the difference between groups. The results of the study are summarized as following. First, in the enforcement of the system of educational autonomy, the election of members of a local school board is necessary. The election of them is desired to be elected directly by the teachers in that city or province than by the assembly of a wide area and it is recognized they are to be elected by the ratio of population. And it is perceived that the present system of educational autonomy is not a independent legislative organ but a mandatory one. The reason of this is believed as following: the basic principle is violated by enforcing the educational autonomy of a wide area but not that of a small one: and the law about the present educational autonomy has many constraints. Second, the election of the superintendent of education is also required not by the electional way by a local school board but by the direct election by the teachers in that city or province. And that of the vice superintendent of education is more desired to be elected by the educational superintendent's recommendation in a local school board than to be appointed by President. This shows most of teachers recognize that the past electional way checks the independence and autonomy of the educational administration and that these have an intention to control education and matters in terms of personnel and administrative hierarchy with the superintendent and the vice superintendent of education. Third, teachers have generally recognized that a lot of autonomy must be guaranteed in a local school board with considering the peculiarity of a country unless the power of a local school board violates public interests and the law. Then many constraints about the power of a local school board is specified as the laws in the local autonomous body or the education department in that city or province. Fourthly, they have recognized that the finances of the body of local educational autonomy must be supported within the scope of national budget but the autonomy which will make up, operate and execute a budget with the local educational character must be assigned. Fifthly, they have believed that the autonomy and independence must be guaranteed in order to deal with the local educational administration according to the population's thought by revising resolutely the article of the centralized control in the education department and also that the real educational autonomy will be accomplished only when the political neutrality in education is ensured.

Honeycomb 연결망에서의 병렬경로

김철 전남대학교 대학원 1999 국내석사

Honeycomb 메쉬는 육각형판을 기반으로 하는 메쉬부류의 상호연결망이다. 낮은 차원의 메쉬는 설계하기 쉽고 확장성이 좋다는 장점을 가지며, 또한 알고리즘 관점에서도 매우 유용하므로 많은 병렬 처리 컴퓨터의 연결망으로 사용된다. Honeycomb 메쉬는 이러한 메쉬 부류 중에서 망비용면에서 다른 메쉬들보다 뛰어난 성능을 보인다. 임의의 두 노드 사이에 병렬경로가 여러 개 있으면, 두 노드 사이에 많은 양의 데이터를 전달할 때 속도를 증가시킬 수 있을 뿐 아니라, 고장 발생시 다른 경로를 선택할 수 있어 좋다. 본 논문에서는 Honeycomb 메쉬에 wrapaound 에지를 추가하여 분지수 3인 정규연결망의 형태를 갖는 honeycomb 토러스에서의 최적 병렬경로를 설정하고, 이를 기반으로하여 이 상호연결망의 고장지름이 diametr + 8임을 보인다. The honeycomb network, based on hexagonal plane tessellation, is considered as a multiprocessor interconnection network. The network cost defined as the product of degree and diameter is better for honeycomb networks than for other types of meshes like mesh-connected computer and tori. Parallel paths offer us bypasses when the networks have faulty nodes or edges and make it possible for a big message which sliced into small packets to be sent on different paths. In this paper, we present a method to construct an optimal parallel path in honeycomb network which is regular graph with degree 3 and show that the fault diameter for the honeycomb network is d+8, where d is the diameter of honeycomb network.

A study on the mechanical and impact properties of Kevlar multiaxial warp knitted fabric reinforced composites : 케블라 다축경편성물 보강 복합재료의 역학적 물성과 충격 특성에 관한 연구

김철 Graduate School, Seoul National University 1999 국내박사