부가영상 삽입 기능을 갖는 화상회의 서버 구현

權聖煥 國民大學校 大學院 1999 국내석사

Alachlor의 植物生長抑制 機作 硏究

권성환 全北大學校 1992 국내박사

우리나라 긴급재난대응체계 개선방안에 관한 연구

권성환 강원대학교 산업과학대학원 2010 국내석사

The recent trend of major man-made disasters in Korea, such as Sungsoo Bridge and Sampooing Department Store collapsing and fire at Daegu Subway in Feb. 2003, brings creating a safe society and strengthening system to create an efficient social relationships and improving the nation emergency response system to create an efficient society as one of our major interest. So it is very important that we prevent out life from various disasters in advance and industrialized society. In this connection, this thesis aims to outline the problems and the direction of development towards improvement regarding disaster response system in Korea. Methodology of this study of literature research and survey were performed at the same time. It is concluded that the sensible solution to these problems are as follows. First, the laws concerned with disaster management must be revised from systematic aspects to functional aspects and it need making a united 'disaster and safety management basic law' that have legal force and effectiveness to deal with lots of disasters. Second, completely united organization focused on disaster managements need establishing because the present disaster management systems leaned upon administration of social owing to insufficiency of connections. Third, incorporative command system, specialized human resource, equal supply educational opportunities, and intensive training are essential for establishing the advance prevention system through structural rationalization of disaster management system. In addition to it is necessary to introduce a 'preliminary inspection' system by regional groups to seek our safety from various disasters. Forth, horizontal allotment among local governments has to be intensified for mutual help among disaster managements organizations and superior information network is required to communicate quickly and accurately. Fifth, in the local government, the more concrete and realistic method and condition should be developed and conducted for the effective disaster management between the local government and responsibility given on the realistic response function by reinforcing the system of the fire station as the center. Because the efficient System of disaster management depend solely on the interest of chief of the local government, it might be different according to the individual chief of the local government. Therefore, for the more effective disaster management, the interest and consideration of policy-maker in the nation will play the vital role in the disaster management of the local government.

셰익스피어 역사극에 대한 해석 : 폴스타프(Sir John Falstaff)를 중심으로

권성환 서울대학교 대학원 1996 국내석사

5축 공작기계의 기하학적 오차 모델링 및 PC-NC에서의 실시간 보정

권성환 경북대학교 대학원 2009 국내박사

Six degrees of freedom are required to express the motion of a object in three dimensional space. For machine tools, the minimum degree of freedom to obtain the tool pose, i.e. position and orientation, is five. Five-axis machine tools, which consist of three prismatic joints and two rotary joints, are good solutions to express five degrees of freedom. Because the position and orientation of the tool tip can be controlled simultaneously in five-axis machine tools, it is more useful to machine complicated part like free-form surface, aerospace parts, automobile parts, and molds for home appliances compared with three-axis machine tool. Machining time can be reduced and better quality products can be obtained using five-axis machine tools. But shape error on workpiece exists due to the several error resources. To get more precise machined part, error sources should be defined and evaluated. Geometric error of a machine tool is one of the important error sources to be reduced. In this study, geometric error evaluation and compensation methods are proposed in a five-axis machine tool. This dissertation describes : 1) Error synthesis modeling of a five-axis machine tool 2) Development of geometric error compensation algorithm 3) Real-tie error compensation based on PC-NC. First, a five-axis machine tool of RTTTR type is developed which consists of three prismatic joints and two rotary joints. The forward kinematics and inverse kinematics using kinematic chain are derived for this machine. Using the kinematics and geometric error defined, error synthesis model and volumetric error model for a five-axis machine tool are proposed. Proposed model is evaluated by applying to free-form surface. Second, algorithm to compensate for the geometric error is developed. More effective compensation algorithm is proposed to be implemented in real-time by using error synthesis model, kinematics described in chapter 2, and error matrix developed in chapter 3. With simulation and comparison with conventional compensation method, proposed method is evaluated In the last chapter, a PC-NC is developed on Windows operating system with real-time sub system to control the servo system of a five-axis machine tool simultaneously, and to carry out all the algorithms: error synthesis model in the chapter 2, error compensation model in the chapter 3, interpolator, and position controller in the chapter 4. Geometric errors are measured by using laser interferometer measurement system, and are fitted by trigonometric polynomial. Applying all proposed algorithms mentioned above to a developed PC-NC, real-time compensation for geometric error is simulated and implemented. The results show that proposed method is adequate to compensate for the geometric error of five-axis machine tool in real-time.

외식업체의 재무자료 분석과 성장률에 관한 연구

권성환 전주대학교 대학원 2021 국내석사

The main purpose of this study is to systematically analyze the growth rate of Korean restaurants through financial data. To this end, this study conducted empirical analysis on 40 restaurants from 2015 to 2019 using the sustainable growth rate model proposed by Higgins. As a result of the analysis, the following conclusions could be drawn. First, it can be seen that the sustainable growth rate, internal growth rate and sales growth rate of all restaurant businesses are falling overall. Second, the turnover rate of total assets of all restaurant businesses was decreasing, but the internal retention rate was increasing every year. Third, a correlation analysis of the variables determining the sustainable growth rate found that the net profit rate of sales among the factors determining the sustainable growth rate of the restaurant company showed a significant positive correlation with the internal retention rate, and that the debt ratio had a significant negative correlation with the reserve ratio. Fourth, the analysis of the impact of the net profit ratio, gross asset turnover, debt ratio and internal retention rate, which are the determinants of the sustainable growth rate of the restaurant business, proved to have a significant impact on the sustainable growth rate in the order of internal retention rate, gross asset turnover rate, net profit rate of sales, and debt ratio. In particular, the coefficient of internal retention rate was 0.466, which is found to be quite influential compared to other variables, which can be explained that the higher the internal retention rate, the higher the sustainable growth rate in the domestic restaurant industry. Fifth, a one-way layout analysis is conducted to verify the differences in major variables according to the size of the restaurant. One result showed a significant difference in gross asset turnover. This can be seen as the smaller the size of the company, the less it is able to utilize the resources held by each company in conducting sales and sales. Sixth, the average total assets of large restaurants were found to be about eight times larger than that of medium-sized ones, and that of medium-sized restaurants was about twice as large as the total assets of small businesses. In addition, the difference in sales between large and medium-sized food companies is about 10 times, while the difference between medium and small food companies is found to be about three times. Based on the results of these studies, it is judged that the growth of competitive restaurant companies is necessary, and long-term measures for the industry including individual companies are urgent.

初等學校 創意性 敎育의 實態 및 發展 方向

권성환 慶熙大學校 敎育大學院 2002 국내석사

This study is designed to present the direction for the desirable creativity training to the elementary school education through investigating how elementary school teachers understand and are aware of the creativity training, grasping the teaching actuality in the real school field, and enlightening the obstructing cause and the plan for betterment. A questionnaire was constructed to 200 objects, elementary school teachers who work in Kyung Ki province. Based on this, results of analysing and synthesizing responses are like following. 1. Although teachers were aware of that the creativity training is absolutely required, they showed negative responses on the satisfaction and also had passive and half-hearted attitudes on it. This shows that most firstly, they have to enhance the unshakable belief and the will of autonomous practice 2. Teachers' understanding of the creativity training marked very low level. And by evaluating themselves being below average, almost teachers had low confidence. In this situation, it is so hard to expect the success in the creativity training. As one of the most pressing problems, Though developing a training program for teachers, the systematic and constant teacher training have to take place. 3. Although 89% of teachers were aware of the need of the teacher training for the creativity training and hoped to participate in this course, teachers who had participated in the training which was managed by the office of education, were only 5.5% of them. And teachers who had never participated in the intramural or the government-managing course, were surprising 67.0% of them. Plains, such as the expansion of the sixty hours general training which tea- chers prefer during the vacation or the establishment of the general training course by schools under the principals' responsibility, must be considered. 4. 74% of teachers were feeling the absolute lack of teaching materials. And to the question asking the most difficult thing when they practice the creativity training, the most of responses is the lack of materials and programmes. And also, of administrative authorities' plans for supporting, 61.5% of teachers requested the support of materials and programmes. Administrative authorities have to develope and secure materials which can encourage learning, and have to propagate it to schools, and school managers have to increase it's financial support for purchasing materials and programmes. 5. Schools, by carrying publicizing and training to parents about the creativity training, have to consider the connected-teaching plan between schools and households. 6. In the side of school environment, the improvement of material environment, such as preparing various spaces, fluent teaching materials and atmosphere like a laboratory, and removing obstructing factors, such as the excess of students per a class, the excess of subjects- teaching hours, and the excess of teachers' trivial duties, these problems have to resolved. And also all educational parties' constant effort for resolving these are required. Finally, because this research takes a small number of objects, some teachers working in a part of Kyung Ki province, it is thought that there are some differences with teachers in all over the country. So, for the more concrete and valid investigation, the research which takes nationwide all elementary schools as objects is required. And I expect the emergence of a intelligent researcher for this.

契約締結過程에서의 情報提供義務에 관한 硏究

권성환 韓國外國語大學校 大學院 2010 국내석사

契約締結過程에서의 情報提供義務 계약은 전통적으로 청약과 승낙의 의사표시의 합치에 의하여 성립한다고 이해되어 왔다. 계약의 구속력이 계약자유원칙이나 사적자치의 원칙에 의하여 정당화되기 위해서는 각 당사자가 계약내용이나 거래의 조건을 결정하는 것을 전제로 의사표시를 할 것이 요구된다. 이에 따라 계약체결의 의사형성을 위한 정보를 수집하고 보유하며 분석하는 책임은 각 당사자에게 있고, 그로 인한 불이익은 전적으로 정보의 수집이나 분석에 실패한 당사자가 부담하는 것이 종래의 전통적 계약관에 따른 귀결이다. "계약체결과정에서의 정보제공의무"란 정보량의 격차가 있는 거래관계에서 보다 많은 정보를 보유하고 있는 일방당사자가 상대방에게 모든 사정을 충분히 알고 나서 계약체결의 의사결정을 할 수 있도록 계약체결의 의사결정을 좌우할만한 중요한 사항에 대하여 일정한 정보를 제공토록 하는 의무를 말한다. 즉 계약교섭과정에 있는 당사자에게 일정한 사항에 대한 명시․설명 의무를 부과하는 것이다. 이는 채권자와 채무자를 상호 대립하는 관계로 보던 전통적인 계약관에서 탈피하여 계약관계를 채권자와 채무자가 공통의 이익을 추구하는 협력관계로 포착함으로 인하여 대두된 이론이다. 이러한 정보제공의무는 처음에는 사업자와 같은 전문가와 비전문가의 관계에서만 적용되어 왔으나, 오늘날에는 비전문가간의 계약교섭 또는 계약체결과정에도 적용되어 가고 있으며, 특히 일방 당사자의 판단능력이 낮거나 나이가 고령인 등으로 인하여 정보량의 격차가 발생하는 경우에도 적용되어 가고 있다. 계약의 체결과 이행과정에서 발생하는 각 종의 정보제공의무는 다양한 보호목적에 이바지할 수 있다. 매도인이 매수인에게 매매목적물의 성상 및 적절한 사용방법에 대하여 설명하여야 하는 경우 또는 계약의 이행과 관련하여 적절한 조언을 해야 하는 경우에는 계약상의 급부이익의 실현을 위한 것이다. 이 경우의 정보제공의무는 계약상 급부의무에 부수하는 급부의무로서 독자적인 이행청구의 대상이 된다. 다른 한편으로 급부 대상 또는 거래상의 접촉으로부터 발생할 수 있는 위험에 대하여 경고할 의무는 상대방 법익의 완전성 보호를 위한 의무라 할 수 있다. 그러나 근본적으로는 계약체결과정에서의 계약당사자의 의사결정의 자유를 보호하고자 함이 정보제공의무의 진정한 목적이라 할 수 있다. 시간적으로 계약체결 이전단계에서 당사자의 의사결정의 자유를 보호하고자 하는 정보제공의무는 자신의 기대나 이익에 부합하지 않는 계약의 구속을 받으면서 발생하는 불이익으로부터 계약당사자를 보호한다. 이러한 연구시도는 전통적인 계약자유원칙의 근본적인 전환을 시도하는 것이 아닌 구조화된 정보격차를 보이는 현대의 계약환경 속에서 계약자유원칙 또는 사적자치원칙이 현대적 상황에 맞게 구현되기 위해, 정보 면에서 우위에 있는 계약의 일방당사자에게 거래상 중요한 정보를 상대방에게 제공하도록 강제함으로써(정보 리스크의 분배) 계약자유원칙의 실질적 구현을 지향하는 것을 궁극적인 목적으로 한다. A Study on the Duty of Providing Information in the Process of Making a Contract Sung Hwan Kwon The master's course in HUFS Contract has been perceived as concurrence between application and acceptance traditionally. To justify the validity of contract on the principal of self-government, contract parties are required to declare the intention on the premise that they determine the contents of contract and the condition of dealing. Each of the contract parties take responsibility for collecting, possessing and analysing the information for making contract, if they are failed to get information the disadvantages are charged with the contract parties in the conventional method. "The duty of providing information in a process of making a contract" is an obligation to offer decisive facts which can influence on the settlement of decision when contract parties have information gap so that more information possessed contractor should provide some information to help the other contractor can declare the intention on the making contract after fully aware. In other words, it is imposing a duty to the contractor to declare and explain about the relevant facts to the other contractor on the process of negotiation in contract. This theory came to forth by apprehending the contract relation as the collaboration connection between creditor and obligator for pursuit the profit together. In the contrary the traditional one understood each other as antagonistic relationship. The duty of providing information has been applied between expert and layman in the beginning, but nowadays the application of this duty is extending the sphere of influence between the laymen, especially when the gap of information is exist with a person in the lack of judgement ability or in old age. These duty of providing information that occur in a process of making and performing contract can contribute various protective purpose. When a vendor describe the vendee about characters, state and appropriate usage of things or counsel on the performing contract, it is all for to attain provisional profit. In this case the duty of providing information is sub-provisional obligation that becomes object of a claim for performance independently. On the other hand, the obligation of warning about the risk that might happen on the provisional object or during the contact for dealing can be said the obligation to guard the benefit and the protection of the law completely. This study is not to convert to tradition of the principal of the liberty in contract but to point the duty of providing information in a process making contract embody the principal of the liberty and the self-government in contract among the structured information gap in this present age by compelling to provide the cardinal information in dealing (risk distribution) and after all materializing the principal of the liberty in contract in substance is its ultimate goal.

미니 스크류의 나사산 형태에 대한 인공골 주위 변형률 및 최대 식립 토오크의 비교

권성환 연세대학교 대학원 2010 국내박사

미니 스크류 디자인은 식립 후 초기 안정성과 연관된 요소로서 다양한 나사산의 형태와 디자인이 개발되고 있으며 평가 방법이 소개되고 있다. 최근 초기 고정력을 향상시키고 응력집중을 감소시키기 위해 미니 스크류에 이중 나사산을 응용한 디자인이 개발되었으며, 해당 구조가 미니 스크류 주변 골의 응력 감소에 실제로 영향을 미치는 지의 여부와 이중 나사산구조가 피질골 두께의 차이에 따라서 어떠한 특성을 보이는지를 알아보기 위해 인공골을 이용하여 미니 스크류 식립시 주변골의 변형률과 식립 토오크를 계측하였다. 본 연구에서는 단일 나사산 형태(OAS-T1507)와 이중 나사산 형태(MPlant-U3) 두 종류의 교정용 미니 스크류 36개를 사용하였다. 인공 피질골 두께가 1.0 mm, 1.5 mm, 2.0 mm인 인공골 블럭을 제작한 후에, 5 element strain gauge를 부착하여 미니 스크류 식립시에 발생되는 변형률을 계측하였다. 또한, 각 디자인 별로 6개의 미니 스크류를 식립하여 식립 토오크를 계측하였으며, 미니 스크류가 최대 깊이로 매식되는 부위에서의 회전력(식립 토오크, Ncm)을 계측하여 다음과 같은 결과를 얻었다. 1. 변형률 그래프에서 단일 나사산에서는 초기 증가 후 점차적으로 감소하다가 일정한 값을 보이면서 나사산에 따라 주기적으로 파동양상이 관찰되었다. 반면 이중 나사산에서는 초기 증가 후 점차적으로 감소하다가 이중 나사산 식립 부위부터 다시 변형률이 증가하는 양상이 관찰되었다. 2. 미니 스크류 식립 시 이중 나사산에서 피질골의 두께가 1.0 mm 에서 2.0 mm로 증가함에 따라 스크류 주변골에 발생하는 변형률이 크게 증가하였다. 3. 미니 스크류 식립 시 피질골 두께의 증가에 따라 단일 나사산 형태에서는 식립 토오크 값에 유의한 차이가 없었으나(P>0.5), 이중 나사산에서 식립 토오크 값이 유의성 있게 증가하였다(P<0.0001). 4. 모든 피질골 두께에 대해 단일 나사산에서 이중 나사산보다 유의성 있게 낮은 식립 토오크 값이 측정되었다(P<0.0001). 이상의 결과에서 자가 식립형 이중 나사산 구조가 미니 스크류의 식립 초기 시 기계적인 안정성을 향상시킬 수 있으나, 피질골 두께 증가에 대해 주변골에 과도한 변형을 야기시킬 수 있다는 점을 고려해야 한다.

음식물쓰레기 호기성 고온 퇴비화 공정분석 및 응축수질을 이용한 대체 운전지표 개발

권성환 서울시립대학교 대학원 2002 국내박사