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      • 복합초점함수의 시간열 영상적용을 통한 3 차원정보복원에 관한 연구

        김정길,한영준,한헌수 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월

        To reconstruct the 3-D information of a irregular object, this paper proposes a new method applying the composition focus measure to time-series image. A focus measure function is carefully selected because a focus measure is apt to be affected by the working environment and the characteristics of an object. The proposed focus measure function combines the variance measure which is robust to noise and the Laplacian measure which, regardless of an object shape, has a good performance in calculating the focus measure. And the time-series image, which considers the object shape, is proposed in order to efficiently applying the interesting window. This method, first, divides the image frame by the window. Second, the composition focus measure function be applied to the windows, and the time-series image is constructed. Finally, the 3-D information of an object is reconstructed from the time-series images considering the object shape. The experimental results have shown that the proposed method is suitable algorism to 3-D reconstruction of an irregular object.

      • 새마을運動의 三大指標에 對한 事業實態와 問題要因 糾明에 關한 硏究(Ⅱ) : 全羅北道內 各 國民學校와 結緣된 새마을을 中心으로

        金貞吉 군산대학교 1975 論文集 Vol.8 No.1

        The saemaul (new village) movement has been launched since 1970 for the purpose of improving rural and urban living standards in accordance with one of the main objectives of the third five-year economic development program of the government. The objectives of the saemaul movement involve three domains : spiritaul development, improving environment, and boosting the income of rural and urban community people. The saemaul movement for five years has made a great effect on the development of our rural and urban communities. In this epoch making period in our history, it is necessary to evaluate the results of the saemaul projects to find more effectively out how to attain the objectives of saemaul movement. According to the necessity stated above, this research has been performed for two years to analyze the problems and the actual conditions, and to find out the methods of improving the saemaul projects. The first results of my research were reported in April, 1974. In this second paper, I report the result of continuing my study on the main problems of the previous research. 1. Method of Research 1) The objects of the research are 180 saemauls which have been connected with elementary schools from 1971 to 1974. 2) For the research, the survey method was used, and it has been performed for two months (August 1 to September 30) by the elementary school teachers who were trained during the in-service education course. 3) The items of the questionnaire were chosen from the reference materials, such as "The Handbook for Realizing the Saemaul Charter" and "The Handbook for Guiding and Leading Rural Community People to Boost their Incomes" published by the Jeon Ra Bug Do Provincial Office. 2. Contents of Research 1) Saemaul movement for spiritual development (1) The problems of saemaul leaders (age, school career, training the saemaul leader and saemaul leader's impression of training course, the subjects which they want to study, the leadership (table 4, 5, 6, 7, 8, 9) (2) The actual conditions of practising the laws of familiy ceremonies (marriage, mourning ceremony, and religious ceremony (table 10, 11, 12, 13) (3) The problems of family planning (table 14, 15) (4) The present condition of the saemaul libraries (table 16, 17) (5) The amount of saving in saemaul banks (table 18, 19, 20) 2) Saemaul movement for improving environment (1) The present situations for establishing saemaul welfare (table 21) (2) The improvement of housing (table 22) (3) The problems of improving environment (table 23) 3) Saemaul movement for boosting income (1) The present basic facilities for production (table 24) (2) The problems of producing Tong-Il(unification) rice IR 667 (table 25) (3) The problems of raising two crops a year in the rice-field (table 26) (4) The present conditions of cooperative farming system (table 27, 28) 3. Findings and Discussion Based upon the results of the research, the problems which we have to discuss are as follows : 1) The present status of the saemaul movement (1) The proportion of the nonfarming houses to farming houses at 180 saemauls is 16.8% in 1971, 23.0% in 1972, 31.8% in 1973, and 45.8% in 1974. The number of the nonfarming houses is incresing every year (table 1, 2). It suggests that the saemaul movement is gradually growing throughout the urban communities. (2) The levels of accomplishing the saemaul projects are the basic saemaul, the self-helping saemaul, and the self-supporting saemaul. The result of the research on the degree of accomplishment suggests that most of the saemauls which have begun the saemaul projects earlier have a great deal of accomplishment. 2) The saemaul movement for spiritual development (1) The school careers of the saemaul leaders are : 19% finished only elementary school, 34% middle school, 29% high school, and 9% graduated from college or university. It suggest that above half of the saemaul leaders have not enough education to carry out the saemaul movement. It is necessary to promote the educational careers of the saemaul leaders through in-service education at the regular adult educational institute (table 4). Most of the saemaul leaders, 93%, have finished the Saemaul Leader Training Course which is held in the provincial educational institute on an average of 2.2 times, totalling an average of 9.7 days per leader, and in the central educational institute on an average of 1.1 times, for a total of 9.1 days per leader (table 5). Most of them suggest that the saemaul leader training is very effective for improving their ability (table 6). 15% of the saemaul leaders answered that the subjects of the training course are difficult for them to understand. It suggest that it is necessary to divide the group two or three levels according to the degrees of the leaders' education or the subjects which they want to learn (table 7, 8). As to the questions on their leadership, 48%, of the saemaul people answered that their leaders are democratic, 47% laisez-faire, and 5% autocratic in performing saemaul projects. It suggests that we have to guide the leaders to perfomr the saemaul projects more democratically. (2) The following results come from practising the new laws concerning family ceremonies, such as marriages, ceremonies of mourning, and religious ceremonies. About marriage, six items were asked and five items of them have not successfully practiced by the saemaul people. The item practiced comparatively well is that the saemaul people, 53%, do not send wedding invitations so as to observe the law (table 10). About the ceremony of mourning, most of the people answered that they do not put the headpiece of hemp worn on the top of a mourner's hood, do not use mourning flag, and do not send the information of one's death individually. But the other items were not practised well (table 11). In the religious ceremony, most of the people do not simplify this ceremony following the new laws concerning family ceremonies (table 12). As to the reason why they do not obey the laws of family ceremonies, most of the people answered that although they understand the idea of establishing the laws of family ceremonies, it is very difficult for them to cast off the traditions, to overcome the fear of having a repentance about the simplified ceremony which they held before, and to overcome the desire not to lose one's honour (table 13). According to the above statement, it suggests that it is necessary to form the spirit of the nation for bringing about rational living and observing the law in everyday life. (3) Though most of the saemaul people, 90%, understand the necessity of the family planning, they can not practise it well because most of them, 80%, want to have two sons and one daughter or three sons and one daughter with the thought grounded on the predominance of man over woman. because they need money for preventing conception, and because it is difficult for them to practise birth control (table 14, 15). It suggests that we have to help the saemaul people develop the spirit of equal rights for man and woman and practise birth control more easily through medical services especially in rural communities. (4) The saemaul library is a facility to help the saemaul people perform their saemaul projects effectively, and the saemaul libraries' actual conditions were investigated in this research. The results are as follows : Most of the saemauls, 62%, have libraries, but thear are a few books, 127 volumes per library (table 16). Most of the saemaul people have answered that they understand the necessity of the saemaul library, and that they read the books to solve problems effectively, but that it is difficult for them to get the books. According to the above statement, it is necessary for us to help the saemaul people to get the books through presentation of the public cooperations connected with the saemauls. (5) According to the results of the present conditions of saemaul banks, most of the banks, 88%, have established funds averaging 438,000 won per bank, but a few of them, 8%, are in debt averaging 266,000 won per bank. It suggests that most of the saemaul people have managed the saemaul banks, but they are still poor. In order to overcome the problem, we have to help the saemaul people to boost their incomes, to get loans with low interest rates, and to try to endeavor to increase their funds. 3) the saemaul movement for improving environment. (1) Most of the saemaul projects for improving environment, such aswidening the road, improving drains, building village hall, installing electricity, and so on, have been performed above 70% of the goal (table 21, 22), but some projects, such as building public bathrooms, methane facilities, public barber shops, and so on, have made slow progress. It suggests that the saemaul people have been trying the improve their environment, but they have no enough resources, materials, and technique (table 23). In order to overcome those problems, the government authorities and the public cooperation is needed to give them more and active support. 4) The saemaul movement for boosting the income (1) According to the result of investigating the present situation of basic farming facilities, the proportion of rice-field adjusted arable Iands is 44% in the level plain district, and 27% averaged from all districts. The number of small tractors is 2.1, and that of threshing mashines is 2.8 on an average (table 24). and the proportion of rice fields irrigated is 56% on an average. Above stated results suggest that in order to boost the yiels of the farming houses, we have to help the saemaul people adjusting arable lands, motorizing farming, ploughing deeply, and irrigating rice-fields continuously through the support of the government authorities and other public cooperation. (2) The proportion of the farming houses cultivating the Tong-Il (unification) rice (IR667), which has been recommended to increase the yield of rice, is 38% on an average. The problems of cultivating it suggested by the saemaul people are that though the output of the yield is high, the quality is inferior, that the market price is low, and that it is difficult to take care of it, and to cultivate it early (table 25). The above statement suggests that it is necessary to guide the saemaul people to cultivate IR 667 more, and teach them the techniques. And moreover, it is important that the government authorities raise the price to increase zeal for the rice production of the seamaul people. (3) The proportion of the farming houses raising two crops a year is 46% of the saemaul farming houses. The reasons not to raise two crops a year are that a greater part of their rice-fields is in wet places, and that they can not get enough income in comarison with invested capital. The results suggest that it is necessary to help them facilitate drain age, to add soil to the rice-fields, to increase the interest in cultivating barley, and wheat through raising the price. (4) In order to overcome poor and under developed farming management, some of the saemaul people, 71 saemauls out of 180, have been developing the cooperative farming system. The kinds of farming with the cooperative system are 24. and the most managed cooperative farming groups have engaged in the cultivation of IR 667 at 14 saemauls, the second have engaged in the cultivation of tobacco-plants at 10 saemauls, and the third have been engaged in the cultivation of vgetables (table 27). As for the question asking their views on the cooperative farming system, most of the saemaul people, 83% of 65 saemauls, answered that it is more effective than individual farming. But there are a lot of problems, such as opening markets, improving techniques, supplying funds, and so on. The government authorities have to try to solve those problems.

      • KCI등재

        An Efficient Cache Mechanism for Improving Response Times in Integrated RFID Middleware

        김정길,이준환,박경랑,김신덕,Kim, Cheong-Ghil,Lee, Jun-Hwan,Park, Kyung-Lang,Kim, Shin-Dug Korea Information Processing Society 2008 정보처리학회논문지 A Vol.15 No.1

        본 논문에서는 WSN(wireless sensor networks)과 RFID(radio frequency identification) 시스템을 통합하여 이용할 수 있는 통합 RFID 미들웨어에서의 효과적인 캐슁 기법을 제시한다. 통합 RFID 미들웨어가 운영되는 환경은 연결된 RFID리더로부터 대규모의 데이터가 입력되고, 다수의 무선 센서로부터 끊임없이 데이터가 입력되는 상황을 가정하고 있으며 또한 특정 목적을 위해 과거에 센서로부터 입력되어 분산 저장되어 있는 히스토리 데이터도 활용될 수 있음을 가정하고 있다. 따라서 캐슁 기능을 구비한 특정 미들웨어 레이어에서 센서 노드로부터 수신되는 연속 데이터와 분산 저장되어 있는 히스토리 데이터에 대한 신속한 질의 및 응답을 위한 효율적 데이터 처리가 절실히 요구된다. 이를 위하여 본 논문에서 제안되는 캐슁 기법은 기존의 캐슁 기법 기반으로 통합 RFID 미들웨어에 특화하여 데이터 처리의 효율을 높이기 위하여 두가지 방법을 제시하고 있으며, 이는 처리 데이터의 유형에 따라 DSC(data stream cache)와 HDC(history data cache) 로 구분된다. 제안된 캐슁 기법은 다양한 파라미터를 이용한 실험을 통하여 신속한 질의 및 응답이 이루어짐을 보여주고 있다. This paper proposes an efficient caching mechanism appropriate for the integrated RFID middleware which can integrate wireless sensor networks (WSNs) and RFID (radio frequency identification) systems. The operating environment of the integrated RFID middleware is expected to face the situations of a significant amount of data reading from RFID readers, constant stream data input from large numbers of autonomous sensor nodes, and queries from various applications to history data sensed before and stored in distributed storages. Consequently, an efficient middleware layer equipping with caching mechanism is inevitably necessary for low latency of request-response while processing both data stream from sensor networks and history data from distributed database. For this purpose, the proposed caching mechanism includes two optimization methods to reduce the overhead of data processing in RFID middleware based on the classical cache implementation polices. One is data stream cache (DSC) and the other is history data cache (HDC), according to the structure of data request. We conduct a number of simulation experiments under different parameters and the results show that the proposed caching mechanism contributes considerably to fast request-response times.

      • 學校園敎育 實態에 關한 考察 : 全羅北道 國民學校를 中心으로

        金貞吉 군산대학교 1975 論文集 Vol.9 No.1

        Summary The school garden is necessary for education of natural science and practical farming in the elementary school. Its necessity is emphasized for helping the pupils to learn through the observation, the practical training, or the physical work. The school garden is classified into three areas such as for the appreciation, for the learning materials, and for the production. In this research, the practical conditions of the school garden were surveyed in the period from July 1 to August 31, 1975. The number of the target school is 146 located in the 11 Guns, Chulla Pukao. The contents of the research are as follows : 1) The average scale of the schools(table 1) 2) The proportion and the area of the school garden(table 2) 3) The proportion of the schools equipped with farming tools and the average number of the farming tools(table 3) 4) The organization and management of the school garden(table 4) 5) The educational program of the school garden(table 5) 6) The outline of the school gardening activity(table 6) 7) The practial training units in the school garden education(table 7) 8) The expenditure of the school garden management(table 8) Based on the result of the research, the problem which we have to discuss for improving the elementary school garden education are as follows : 1) Ninety percent of 146 schools has its own garden either for the appreciation or for the learning materials, and the per area of each pupil is 1.5m2. Moreover, the average area of the school garden for production is 22.3m2 per pupil who is in the four to six school year. It suggests that all of the elementary schools have aspacious area to help the pupils get the desirable educational experiences through the school garden for farming(see table 2). But the school which has lent the space for production to the community people is 9.6%(see table 6). It has to be readjusted for the pupils to cultivate by themselves. 2) Most of the schools has the farming tools for mamagement of the school garden, but the number of them isn't seriously sufficient. For example, there are 16.5 shovels and 17.5 hoes per school on an average. The facts revealed above suggest that every school has to be supplied with enough farming tools so that 60 or 120 pupils are able to take practice together at a time(see table 3). 3) Concerning the organization and the management of the school garden, the school gardens are managed by the class(81.5%), by the club(55.4%), by the pupil assembly(14.4%), and by the parent-teacher association(43.2%)(see table 4). In order to reach the fruitful effect of the school garden eduation, all of the groups described above have to participate altogether. Accordingly, it is necessary for every school to improve the ways of management by helping those groups so as to take the positive participation. 4) The most desirable program for the school garden activity should be done within the total school planning. But according to the result of the research, the rate of farming managed in the scope of the total school planning is only 18.8% out of the 146 schools. The program should not be organized by a few teachers or a class room teacher, but by the whole. For it will help us not only to reduce the expenditure, but to have a variety of activities for farming the garden. 5) In order to help the children to have a number of experiences in their school lives every day, most of the schools have arranged the window gardens(57.5%) in their class rooms, the flower gardens(58.9%) outside their class rooms. And the school which has gardens for the appreciation and the learning materials is 66.4%. The data suggests that most of the schools have some colorful programs. But the plural programs have to be empoloyed by all schools(see table 6). 6) According to the actual conditions of the experimentation and the practical training, 50.7% of the 146 schools cultivates barley or vegitables in the graden, and 38.4% rice on the rice field, And 35.5% of them has the nursery gardens, 16.4% the hothouses, and 6.8% the vinyl houses for raising the special vegitables. The proportion of the breeding is lower than that of the cultivation(see table 7). The findings suggest that most of the schools should have programs to help the pupils have a various experience. But we should make a great deal of effort for the schools to do the roles as the community for improving the ways of the farming and the living, and also to prepare the various resources so that the pupils are able to learn in accordance with the curriculum. 7) On the management expence for the school garden, five questions were asked as follows : 1) Are the budgets of the department of natural science and practical course set up respectively? 2) In the club activity, how much is the productivity emphasized? 3) Is the management cost supplied with the money getting from selling products? 4) Is the management cost supplied with the budget of practical course? 5) Does your school have the management cost for school farming? The answers for the questions(see table 8) indicate that in order to normalize the school garden education, the management cost of the department of natural science has to be devided from that of the practical course, that the club activity of the practical course has to be strengthened the productivity, and that a part of the management cost has to e supplied with the money earned by selling products.

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