• 인터넷정보학회논문지
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• 제4권2호
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• pp.11-19
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• 2003

범용으로 설계된 EXT2나 UFS에 캐시 데이터를 저장하는 기법은 파일 구조가 범용이기 때문에 엘 캐시에서 요구하는 속도를 충족시키지 못한다. 된 연구에서는 웹 파일에 대한 특성을 적용하여 파일 시스템을 최적화함으로써 좀 더 나은 솔루션이 존재한다는 사실을 제시하였다. 제안한 저수준 캐시파일 시스템(RawCFS:Raw Cache File System)은 캐시된 객체의 크기와 액세스 권한 변경이 불가능하고, 오리지널 서버에 최신본이 존재한다는 사실에 기인하였다. 본 파일 시스템은 성능 평가에서 객체 단위로 개변 과일에 저장하는 기법에 비해 40% 가량 빠른 것으로 확인되었으며 캐시 서버뿐만 아니라 이미지나 HTML 페이지 같은 객체론 클라이언트에게 빠른 서비스를 위한 쇼핑몰이나 인터넷 방송국 같은 대용량 엘 서버 설계시에도 활용될 수 있다.

• 가정과삶의질연구
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• 제10권1호통권19호
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• pp.139-156
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• 1992

The purpose of this study is to provide basic data for the solution of occupant problems related to the house purchasing. For the purpose, the content of problems and actual conditions of house purchasing are examined. Also the structural analysis of occupant's evaluation of housing purchasing is executed. For these purposes, a survey was conducted using questionnaires. Data analysis was conducted from 263 house owners in Seoul. Major findings of this study can be summarized as follows ; 1) The frequency and the contend of occupation's problems with house purchasing are studied. The rate of housing problem occurrence is 71.2%, so the majority of respondents experience problems. The most common problems are the difference from supplier's description(53.2%). The rate of housing problems occurrence is qenerally high with the houses of mult-housedhold houses and mult-family houses type. 2) There is a significant difference in housing satisfaction extend according to the existence of an housing problem experience. Therefore, it can be inferred that experience of housing problem has an important effects upon the housing satasfaction extent. 3) Occupants' countermoves to the housing problems are examined. Occupants make active regotiation with house suppliers only on the direct damages such as an economical loss or a living difficulty. However, they usually make no countermove at all on the other indirect troubles. House suppliers make correction only when occupants' countermove actively, but refuse to do when occupant's reactions are not active. 4) As a means of countermove, most occupants depend on direct personal regotiation with house suppliers. The rate of using a specialist or public and private consultant is extremely low. 5) Problems with house purchasing and the countermove process of both occupant and house supplier are displayed in the figure(Fig. 4-4).

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권9호
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• pp.4188-4206
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• 2016

Power control is widely used to reduce co-channel interference in wireless networks and guarantee the signal-to-interference plus noise ratio (SINR) of ongoing connections. This technique is also effective for wireless body area networks (WBANs). Although achieving satisfactory SINR is important for WBAN users, they may not be willing to achieve it at arbitrarily high power levels since power is a scarce resource in WBANs. Besides, for WBANs with different purposes, the QoS requirements and concern about the power consumption may be different. This motivates us to formulate the power control problem using the concepts from microeconomics and game theory. In this paper, the QoS objective is viewed as a utility function, which represents the degree of user satisfaction, while the power consumption is viewed as a cost function. The power control problem consequently becomes a non-cooperative multiplayer game, in which each player tries to maximize its net utility, i.e., the utility minus the cost. Within this framework, we investigate the Nash equilibrium existence and uniqueness in the game and derive the best response solution to reach the Nash equilibrium. To obtain the optimal transmission power in a distributed way, we further propose a utility-based and QoS-aware power control algorithm (UQoS-PCA). Tunable cost coefficient in UQoS-PCA enables this scheme to be flexible to satisfy diverse service requirements. Simulation results show the convergence and effectiveness of the proposed scheme as well as improvements over existing algorithm.

• 동의신경정신과학회지
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• 제8권2호
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• pp.1-12
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• 1997

As there has recently been growing interest in Alternative Medicine, Oriental Medicals have been trying to incorporate Alternative Medicine into Oriental Medicine evolutionarily. The purpose of this study is to make a comparative study of the historical background and present condition, the view of life, the principle of therapeutics, and the various therapeutics in Alterative Medicine and Oriental Medicine from the viewpoint of Oriental Medicine. The conclusion of this study is; 1. Although Alternative Medicine has become influential mainly in the effort of finding a solution the limit of western medicine, the clinical effect of Alternative Medicine should be verified continuously. 2. Alternative Medicine includes all of the therapeutics such as Traditional Medicine, Naturopathy, Complementary Medicine and Selective Medicine whose characters are different from Western Medicine and Oriental Medicine can be regarded as a sort of Alternative Medicine. 3. The holistic, systematic view of life of Alternative Medicine, from which viewpoint human considered as a harmonious vital existence, is a sort of recurrence to the view of Hipporcrates. 4. From the viewpoint of Alternative Medicine, a disease is not partial but holistic disorder and is treated by utilizing natural products as a medicine based on the principle that pursues harmonious and balanced psychosomatic function. This principle of therapeutic is the same as Oriental Medicine is based on. 5. Alternative Medicine may be classified largely five category, (1) Eastern Therapy, (2) Manipulative Therapy, (3) Natural Therapy, (4) Active Therapy, (5) Therapy Involving External Powers. 6. Besides Alternative Medicine which is used in clinical treatment, Massage, Homeopathy, Bach Flower remedies, Meditation, and other Music Therapy and Color Therapy is relatively accordant with therapeutics in Oriental Medicine and should be more actively accepted in clinics and improved.

• 폴리머
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• 제26권3호
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• pp.307-315
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• 2002

폴리스티렌의 취약한 성질을 개선한 내충격정 폴리스티렌 (HIPS)의 내충격성에 영향을 주는 요소는 분산된 고무상 입자의 크기 및 입도분포, 분자량, 형태구조, 그래프트율 등이다. 이에 따라 HIPS의 물성은 영향을 받으므로 이를 조절하거나 파악하는 것은 중요하다. 본 연구에서는 HIPS의 벌크-용액중합에서 용매함량이 고무입자의 형태구조 및 입도분포, 최종 물성에 미치는 영향에 대하여 고찰하였다. 먼저 중합 진행에 따른 분산상의 입도분포를 측정함으로써 상역전 현상의 변화 추이를 파악하여 전중합 시간을 결정하였다. 중합시 분산용매는 적절한 양에 도달하기 전까지는 고무입자의 크기가 증가하였으며, 그 후에는 점차적으로 감소하였다. 고무상의 형태구조는 분산용매가 증가함에 따라서 그래프트율이 증가하는 형태구조로 바뀌는 것으로 사료된다. 분산용매가 첨가됨에 따라 유변물성 및 인장물성이 취약해졌는데, 이는 분산용매에 의한 사슬이동반응이 매트릭스상인 폴리스티렌의 분자량을 감소시킨 점과 잔류 용매의 존재 때문이었다. 하지만 내충격성은 분산입자의 크기가 증가한 경우 향상되는 경향을 보였다.

• 한국정보통신학회논문지
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• 제5권6호
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• pp.1136-1142
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• 2001

$Zn_xSr_{1-x}S$ 박막을 sputtering법에 의해 제작하여 결정구조, 결합상태, 광학적 특성 등의 분석에 의해 고용체 유무를 판단하고 유전체 이론과 비교.검토하였다. 실험 결과 $0.86~0.93{\leq}x{\leq}1$에서 zincblende구조, $0{\leq}x{\leq}0.29$ 범위에서 rocksalt 구조의 고용체로 되었으며, 이들 영역에서는 격자정수, 결합에너지 및 흡수단은 조성에 따라 거의 직선적으로 변화했다. 상분리 영역을 포함한 miscibility gap은 $0.3{\leq}x{\leq}0.86~0.91$범위에서 존재하고 이 영역에서의 격자정수, 결합에너지 및 흡수단은 경계 조성의 값으로 일정했다. 상전이에 관한 실험결과는 Phillips의 유전이론에 기초한 이온성과 일치하였다.

• 한국환경보건학회지
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• 제26권3호
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• pp.32-37
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• 2000

Nowadays, a new word called SBS(sick building syndrome) has been come into existence. At the point of time when an interest about indoor air pollution and, according to this, countermeasure plan are internationally. Moreover institutional countermeasure should be attended at national level since indoor air quality in public places where many people gather is directly connected with national health. Especially indoor pollution of indoor stadia where all sorts of sports are held can give rise to every kinds of respiratory ailments to players as well as audiences. So it is presented as a main factor that indoor space of stadia is crowded with players and audiences compared with other kinds of indoor space. Therefore, in this research to analyze pollution degree of indoor circumstance for gymnasium and exercising room of folk wrestling. basketball, judo, wrestling, hapkido, swordsmanship and boxing making indoor gymnasium and exercising room an object, when 7 items were measures such as thermocircumstance(temperature, relative humidity, air current, intensity of illumination), dust, carbon monoxide, and carbon dioxide being based on the indoor environmental standard of the first clause of Article 45 of public utilization service which is showed at public hygiene of the Ministry of Health and Social Affairs, it was showed that indoor temperature, relative humidity, air current and intensity of illumination were over standard amount at the most of folk wrestling gymnasium and exercising room. Indoor density of carbon monoxide was preserved to the extent of standard amount (10ppm) at all gymnasiums but carbon dioxide was not in excess of standard amount(1,000 ppm) at most of gymnasiums. Indoor density of dust induced from respiration exceeded the standard amount (150 $\mu\textrm{g}$/㎥) at all gymnasiums of the folk wrestling. Since the folk wrestling players and participants feel physical subjective symptom seriously, in other words the degree of indoor air pollution at gymnasiums and exercising rooms of the folk wrestling is very high, fundamental solution and countermeasure plan should be presented.

• 조명전기설비학회논문지
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• 제24권2호
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• pp.120-126
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• 2010

본 논문은 고압용 전류제한 퓨즈의 열화 요인으로 작용되는 반복과전류에 의한 퓨즈 엘리먼트의 용단특성을 시험을 통하여 분석 및 규명하였다. 반복과전류에 의한 열화 진행 속도를 규명하기 위하여 엘리먼트노칭 형상별 열 해석을 수행하였으며 판형, 환형의 다양한 시험용 엘리먼트의 형상을 설계, 제작하여 이를 기중상태 및 규사충전상태의 소호제 유무에서 부하율을 조정하여 반복과전류 시험을 통한 용단특성을 분석, 수명과의 관계를 예측할 수 있는 자료를 제시하였다. 본 논문의 시험을 통하여 반복과전류에 의한 소호제와의 마찰로 퓨즈 엘리먼트의 변형 및 단면의 감소와 반복응력으로 인한 균열이 발생하여 퓨즈 반복 횟수에 따른 수명을 단축시키는 문제점의 도출과 엘리먼트 노칭 형상에 따라서 용단 특성이 차이가 있음을 알 수 있었다. 본 논문의 결과물은 재료의 마찰과 반복 전류의 부하율에 따른 반복 수명과의 상관관계에 관한 내용으로 고압용 전류제한 퓨즈의 성능 향상 개선을 위한 설계 시 중요한 기초 자료로 활용되리라 기대된다.

• 한국해양학회지
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• 제22권1호
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• pp.9-18
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• 1987

제주도 주변 해역에 대한 많은 해수 특성 연구와 최근의 해류 관측 결과들은 제주도 서쪽 및 북쪽 해안에 연중 존재하는 시계 방향의 잔류가 있 음을 시사해 준 다. 제주도 동편 해역에서는 쓰시마 해류가 북쪽과 북동쪽으로 흐른다. 이 논문에서 는 2차원 비선형 천해방정식의 수치해로부터 구한 제주도 주변의 조석 잔차류가 관 측된 잔류를 어떻게 설명할 수 있는 가를 고찰하였다. 계산된 조석 잔차류는 섬 주 위에서 우선 회순환을 나타내며 섬 주위의 해저 경사 위에서만 2-4cm.s$^{-1}$의 크기로 현저히 나타나고 섬에서 멀리 떨어진 외해에서는 무시할 정도로 작다. 또한 제주도 주변의 잔류 순환에 대한 쓰시마 해류의 영향을 보기 위해 모델에 항류를 도입하여 수치 실험을 시도 하였다. 이러한 수치 실험 결과, 조석 잔차류와 쓰시마 해류에 기인된 항류의 복합된 효과가 제주도 서쪽 및 북쪽 해안에서 관측된 우선회 잔류와 섬의 동쪽 해역의 북향류를 잘 설명할 수 있음이 밝혀졌다.

• Archives of Plastic Surgery
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• 제33권5호
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• pp.601-605
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• 2006

Purpose: Large skin defect by various causes, should be covered by autologous skin graft. But, the donor site of autologous skin graft is limited and leaves permanent donor scar and contracture. There have been our trial to engineer artificial skin using allogenic dermis (AlloDerm) with basement membrane. Methods: Dermal and epidermal layer were separated by immersing in dipase solution for 30 minutes, and the separated layers were treated with 0.05% trypsin for 10 minutes. And then each layer was cultivated to fibroblasts and keratinocytes on a culture medium. Fibroblasts were first penetrated into basement membrane of allogenic dermis facing down, then allogenic dermis was flipped over to face up and keratinocytes were transplanted to allogenic dermis. Results: Observing artificial skin fabricated in vitro, we found following: 1) The artificial skin opened in air for 5 days formed epidermal layer. In dermal layer, fibroblast was distributed evenly among all. 2) The artificial skin opened in air for 30 days formed thicker and thicker, and it formed basement membrane, spinous and granular layers. PAS stain to confirm existence of basement membrane showed positive reaction. 3) Cytokeratin 10 stain to confirm the formation of epidermal layer showed positive reaction. 4) The formation of thick keratin, lamellar body and desmosome similar to human skin were observed in result of an electron micrograph. Conclusion: As a result of research, the structure seen in normal skin such as rete ridge, is found in reproduced artificial skin. This type of artificial skin can be used as a useful model for investigating skin disease and for clinical application also.