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이기철 부산 외국어 대학교 2001 外大論叢 Vol.22 No.1
This study aims to examine the degree of satisfaction and the way of improvement in leisure activities with the aged participating in leisure activities.The subjects of this study were 130 over 60 years old in Ulsan and the questionnaires were written down by the subjects themselves through direct visits.The data of this study were processed by the frequency analysis and x2 test . The results of this study is as follow: 1) Participation in leisure activities of the aged has significant difference in health condition and living standard. 2) Degree of satisfaction indicates significant difference in health condition and living standard.
웹 탐색 성능 향상을 위한 강화학습 이용과 기준 페이지 선택 기법
이기철,이선애 한국컴퓨터산업학회 2002 컴퓨터産業敎育學會論文誌 Vol.3 No.3
웹의 세계는 하루가 다르게 확장되고 있다. 이에 따라, 지능형 정보추출 기능이 없다면 우리는 넘쳐나는 데이터 앞에서 더욱 무기력해 질 수밖에 없다. 범용 탐색 엔진을 위한 기존의 웹 검색 기법은 특정 영역이나 특정 키워드에만 집중해야하는 특정 검색 엔진에는 너무 느린 경향이 있다. 본 논문에서는 웹 검색 능력을 개선하는 새 모델을 제시하고 실험하였다. 특정 영역과 관련된 초기의 관련 웹 페이지 집합에서 적절한 웹 페이지들을 선택하는 문제는 웹 검색 속도를 향상시키기 위해 매우 중요할 수 있다. 기준 웹 페이지 선택 기법 DOPS는 선택된 웹 페이지들이 가능한 한 직교성을 갖도록 동적으로 웹 페이지를 선택한다. 또한 새로 정의된 메져를 이용하여 적합한 기준 페이지들의 수도 결정해줄 수 있다. 매우 특화된 영역에 대한 실험을 통해서도, 본 방법은 거의 전문가 수준에 가까이 동작하였다. 전문가들이 초대형 초기 페이지 집합에 대해 일할 수 없다는 점과 그들도 기준 페이지 수의 최적치를 결정하기에 어려움을 느낀 다는 점을 고려하면, 본 방법은 매우 유망하다 할 수 있다. 또한 웹 환경에 강화학습도 적용하도록 하였고, DOPS에 기반을 둔 강화학습 실험을 통해 본 방법이 하이퍼링크 수나 시간 면에서 매우 양호한 결과를 보임을 알 수 있었다. The web world is getting so huge and untractable that without an intelligent information extractor we would get more and more helpless. Conventional web spidering techniques for general purpose search engine may be too slow for the specific search engines, which concentrate only on specific areas or keywords. In this paper a new model for improving web spidering capabilities is suggested and experimented. How to select adequate reference web pages from the initial web Page set relevant to a given specific area (or keywords) can be very important to reduce the spidering speed. Our reference web page selection method DOPS dynamically and orthogonally selects web pages, and it can also decide the appropriate number of reference pages, using a newly defined measure. Even for a very specific area, this method worked comparably well almost at the level of experts. If we consider that experts cannot work on a huge initial page set, and they still have difficulty in deciding the optimal number of the reference web pages, this method seems to be very promising. We also applied reinforcement learning to web environment, and DOPS-based reinforcement learning experiments shows that our method works quite favorably in terms of both the number of hyper links and time.
이기철,김동필 한국조경학회 1989 韓國造景學會誌 Vol.17 No.2
The purpose of this study was to supply data of resident′s participation direction about children′s playground management. In this study, use disposition and consciousness of resident about management are investigated and analyzed at the 5 children′s playground in Taegu city. The results of this study were as follows: The result of resident′s use disposition showed ; visiting frequency was "everyday or occasionally(53.5% )", and visiting purpose was "for children(47.9 %), for rest, sports, spare time(24.6%)" and visiting time was equal1y except forenoon, and staying time was "within 1 hour(73.1%)". The satisfaction about park facilities and park existence of residents′ is composed importance degree of which is convenient, manyfunction spaces, managemental of tree and facilities in order. 9.3% of residents were proposal experience about management, and concern ratio of circumferenmce showed highly "concerned answer(45.9%)" About consciousness ratio of management subject, 46.5% of residents depended on authorities leading. Wholly, recognition ratio showed low. Park administration of authorities leading and lack of resident′s concern wore thought as its problem. About experience of cleaning beautification rout children′s playground, 14.2% of residents answered "be experience". Participation type of desirous management showed highest "cleaning of fallen leaves and rubbish(22.7% )". So, residents wished to take part in such simple managements. Charge of necessary tool and cost for management showed highest "partial charge of residents (47.9% )". About participant ratio of self government activity made by residents, 75.1% of residents answered "don′t be participated". A reason of nonparticipation showed "insufficiency of place and opportunity (38.7%), deficiency of time(17.97)". Activity of initiative and existing group can be done as a fine device in future. Desirous events for children and residents showed highest "play guidence for children or meeting for aged milan(40.7% )". Therefore, it will have to consider enough about resident′s participation program for activity of use and efficient management of children′s playground.
가용성과 작업의 균등분배를 위한 JMX기반 클러스터 서버시스템
李基哲,蔡熙星 弘益大學校 科學技術硏究所 2003 科學技術硏究論文集 Vol.14 No.-
Information demands are fast rising, and today's computer system servers need to serve as many users and as many kinds of applications as possible, Therefore, a clustering system is mainly the internal structure of a server. Technically the server needs to be designed to load balance well. In this paper, a new clustering scheme is suggested for easy construction and maintenance of a server using Java Management Extensions. Recent Java technologies such as J2ME, J2EE, JMX, Jini and JDMK made it possible to integrate existing system functionalities based on the Java technology. Moreover, the adoption of application servers based on EJB technology speeds up rapidly. Recently, the demand of supporting on-line multimedia contents which have multiple terabytes size data increases. To address this problem, a clustering system which interconnects multiple computers with moderate price range seems to be very popular as an alternative to a single, high performance server. Experiments show that our system is easy to construct, expand, and load balance well even for dynamic situations of node additions, deletions, and malfunctions.
걷기운동 시간이 혈청지단백 및 아포지단백에 미치는 영향
이기철,권유찬,박진기 부산 외국어 대학교 2002 外大論叢 Vol.25 No.-
The purpose of this study was to investigate the changes of serum lipoprotein and apolipoprotein after 80min aerobic exercise. Subjects were composed of seven obese women. lipoprotein was determined for each subjects by administering a treadmill exercise test. The exercise intensities was 80%HRmax. The result of this study are as follows ; 1. Free fat acid was increased during walking exercise each 20min, 40min, 80min. 2. HDL-C was increased and LDL-C was decreased during walking exercise. Especially, more change at 80min. 3. Apo A-Ⅰ and Apo A-Ⅱ was significantly(p<.01) increased during walking exercise. 4. Apo C-Ⅱ was not changed, but Apo C-Ⅲ was decreased during walking exercise at 40min, 80min, In conclusion, bout walking exercise was shown to positive influence on serum lipoprotein and apolipoprotein. So it is maybe thought that walking exercise improved lipoprotein metabolism for obesity treatment.