• 제목/요약/키워드: Self healing

검색결과 486건 처리시간 0.029초

고로슬래그미분말을 혼입한 경화제 무첨가 에폭시수지 모르타르의 물리적 성질 및 자기치유 검토 (Investigation of Physical Properties and Self Healing of Hardener-Free Epoxy-Modified Mortars with GGBFS)

  • 조영국;김완기
    • 한국구조물진단유지관리공학회 논문집
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    • 제24권1호
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    • pp.80-87
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    • 2020
  • 본 연구는 고성능 폴리머 시멘트계 프리캐스트 제품의 개발 및 미세균열 발생 시 자기치유기능을 확보할 목적으로 경화제 무첨가 EMM의 물리적 성질을 검토하고, 그 물성에 영향을 끼치는 시멘트 매트릭스 내의 에폭시수지 경화도와 현미경을 통한 조직구조의 관찰과 함께 자기치유효과를 검토하였다. 그 결과, 경화제 무첨가 EMM의 폴리머 혼입에 의한 강도 개선 효과는 인장강도, 휨강도, 압축강도의 순으로 나타났다. 접착성은 콘크리트 피착체의 모세관 공극에 폴리머 필름의 형성에 기인한 투묘효과에 기인하여 크게 향상되었다. 투수저항성은 폴리머 결합재비 20% 및 고로슬래그 미분말 치환율 30%를 병용한 EMM에서 보통시멘트 모르타르 대비 97%의 감소율을 나타내 매우 우수하였다. 고로슬래그미분말, 팽창재 및 황산나트륨을 병용한 EMM의 균열 폭은 고로슬래그 치환율이 증가함에 따라 미미하게 감소하였으나, 고로슬래그미분말 치환율 20%에서 수중침지기간의 증가와 함께 서서히 균열부 자기폐색 효과를 관찰할 수 있었다.

Ti3Ci2Tix MXene 기반 전극 소재의 자가 치유 적용 기술 개발 동향 (Recent Progress of Ti3Ci2Tix MXene Electrode Based Self-Healing Application)

  • 최준상;정승부;김종웅
    • 마이크로전자및패키징학회지
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    • 제30권3호
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    • pp.20-34
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    • 2023
  • 수 나노미터의 두께의 단일 또는 여러 층으로 구성된 2차원 소재는 전기전도성, 유연성, 광학적 투명성 등의 고유한 특성으로 많은 연구 분야에서 활용되고 있다. 이 중 Electronic skin (E-Skin)이나 Smart Textile 과 같은 반복적인 기계적 동작이 수반될 수 있다. 또한, 온도, 습도, 압력과 같은 외부적 요인에 노출이 되는 경우가 빈번하다. 이 때, 소자의 내구성과 수명 저하를 유발하기 때문에 자가 치유 특성이 내포된 소자를 제작하기 위한 연구가 많이 이루어지고 있다. 최근 다양한 2차원 소재 중 자가 치유 기능을 구현할 수 있는 Ti3Ci2Tix MXene 기반 전극의 복합 소재의 연구 결과가 학계의 주목을 받고 있다. 본 논문에서는 Ti3Ci2Tix MXene의 다양한 합성 방법 및 특성에 대해 소개한 후, Ti3Ci2Tix MXene 전극 기반의 자가 치유 적용 기술 사례에 대해 알아보고자 한다.

Osteopathy 의 한의학적 임상활용 방안에 관한 소고 (The Study on Clinical Application of Osteopathy to Oriental Medicine)

  • 홍서영;임형호
    • 대한추나의학회지
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    • 제3권1호
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    • pp.85-96
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    • 2002
  • Objectives : The purpose of this study is to get knowledge about osteopathy and to applicate the osteopathy to oriental medicine. Methods: We investigated several books and literatures on osteopathy related sites explored by internet to know the general theories and present conditions of osteopathy in Korea and other countries. Results & Conclusion : 1. The principles of osteopathy are as follows. First, the human being is a dynamic unit of function. Second, the body possesses self regulating mechanisms which are self healing in nature. Third, structure and function are reciprocally interrelated. Fourth, the body rational therapy is based upon knowledge and use of the above three principles. 2. Doctors of osteopathy evaluate the musculoskeletal system to identify structural problems and to support the body's natural tendency toward health and self healing. 3. We can applicate the osteopathy to oriental clinical medicine based on interpreting the principles of osteopathy.

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Self-healing 방법을 이용한 박막의 절연파괴 현상 연구 (A study on the Electric Breakdown Mechanisms using Self-helfing Method of Thin Film)

  • 윤중락;권정열;서강원;박인환;이헌용
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1992년도 추계학술대회 논문집
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    • pp.11-13
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    • 1992
  • The dielectric reliability of the Thin $SiO_2$ films of wet oxidation on n-type Si substrates has been studied by using self-healing method of breakdown and according to injection time high frequence C-V tests. These experiments have been performed to investigate the dielectric breakdown mechanism of a thin film in which positive charge generation during high-field Fowler-Nordheim tunneling are considered. In addition, The weak spots and robust areas are distinguished so that the localized dielectric breakdown could be described.

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DTS를 활용한 광복합 지중 배전계통 실시간 감시시스템 개발 및 성능평가 (A Development and Performance Assessment of On-Line Monitoring System for Optical Fiber Composite Underground Distribution Network using DTS)

  • 조진태;김주용;이학주;조휘창;최명호
    • 조명전기설비학회논문지
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    • 제25권6호
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    • pp.115-121
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    • 2011
  • Intelligent distribution equipment is inevitable to realize self-healing which is one of smart grid functions in distribution network. Therefore, most of distribution equipment have been developed with self diagnostic sensors. However, it is not effective to construct on-line monitoring system for underground distribution cable because of high cost and low sensitivity. Recently, optical fiber composite cable is being considered for communication and power delivery in order to cope with increasing communication in distribution network. This paper presents the design and performance assessment results of underground cable on-line monitoring system using DTS(Distributed Temperature Sensing) and optical fiber composite underground cable.

아크릴레이트의 온도별 자가 보수 성능에 관한 연구 (A Stduy on the Self Healing Performance of Acrylate at Elevated Tmeperature)

  • 이보성;박진상;최수영;김동범;김병일;오상근
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2018년도 추계 학술논문 발표대회
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    • pp.175-176
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    • 2018
  • In this study, the performance of acrylate was evaluated by using acrylate composite waterproof sheet. Through this experiment, the waterproof sheet plays a primary role of waterproofing. When the water leakage occurs, the acrylate reacts with water and expands, and the performance of the self repairing of the damaged part is confirmed by temperature.

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소프트웨어 오류 탐지를 위한 아키텍처 기반의 다계층적 자가적응형 모니터링 방법 (An Architecture-based Multi-level Self-Adaptive Monitoring Method for Software Fault Detection)

  • 윤현지;박수용
    • 한국정보과학회논문지:소프트웨어및응용
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    • 제37권7호
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    • pp.568-572
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    • 2010
  • Mission-critical 시스템의 경우 자가 치유는 신뢰성을 보장하기 위한 기술 중 하나이다. 자가치유는 오류 탐지와 오류 회복으로 이루어져 있으며 오류 탐지는 오류 회복을 가능하게 하는 자가 치유의 중요한 첫 단계이지만 시스템에 과부하를 주는 문제가 있다. 모델 기반의 방법 등으로 오류를 탐지할 수 있는데 시스템의 모든 행위를 통지하고 정상 행위 모델과 통지된 시스템의 행위를 비교하여야 하므로 그양이 많고 부하가 크기 때문이다. 본 논문에서는 모델 기반의 오류 탐지 방법을 보완하는 아키텍처 기반의 다계층적 자가적응형 모니터링 방법을 제안한다. 소프트웨어 아키텍처 상에서 오류 탐지의 중요도는 컴포넌트 마다 다르다. 각 컴포넌트마다 발생하는 오류의 심각도와 빈도가 다르기 때문이다. 모니터링 중요도가 높은 컴포넌트에는 강도가 높고 모니터링 중요도가 낮은 컴포넌트에는 강도가 낮도록 모니터가 적응한다면 오류 탐지의 부하는 줄이고 효율은 유지시킬 수 있다. 또한 소프트웨어의 환경 변화 및 아키텍처상의 변화 등에 따라 오류 발생 빈도가 변화하여 컴포넌트의 오류 탐지 중요도가 변화하기 때문에 학습을 통해 이를 추적하여 자가적응적으로 중요도가 높은 컴포넌트를 집중 모니터링 한다.

국내 치유농장 경영주의 사업동기에 따른 특성 분석 (Characteristics of Agro-Healing Farms according to Business Motivation)

  • 김기용;김경미;이상미
    • 농촌지도와개발
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    • 제24권3호
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    • pp.173-183
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    • 2017
  • The purpose of this study was to identify differences by business motivation of agro-healing farm s in Korea. A survey was conducted for entrepreneurs in agro-healing farmers with self-administered questionnaires. Main results of this study were as follows: First, business motivation of agro-healing farm s in Korea can be classified to 1) education-oriented, 2) care-oriented, and 3) sale revenue-oriented motivation. Second, care-oriented farms provide healing services to people in need like the disabled. These farms may be required a long-term program such as residence-required format. And these farms need supports of health and medical service personnel or institutions. Third, sale revenue-oriented farms have sources of main income from agricultural products or processed goods made in these farms. Therefore, these farms may be required a business strategy such as product development, marketing rather than agro-healing programs. fourth, the estimation of a Multinominal logistic regression model determines the characteristics of agro-healing entrepreneurs who are most likely to opt for each type motivation of participating for agro-healing farm business. the most important determinants on business motivation of agro-healing farms were 'participants type in programs', 'program operating time', 'supporting health and medical service personnel or institutions' and 'program revenue ratio in farm operating revenue'.

산림 치유 관련 논문에 관한 체계적 고찰 (Systemic Review on Forest Healing Journals)

  • 선승호;이선구
    • 동의생리병리학회지
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    • 제24권4호
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    • pp.566-570
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    • 2010
  • This review was conducted to investigate clinical trial trend, clinical effect, and study methods of forest healing. Literature search was performed using the search engines of eight electronic databases from inception to march 2010 without language limitation. The search terms were "forest healing", "forest experience", "forest therapy", "forest treatment", "clinical trial", and "clinical study". Inclusion criteria were randomized controlled trials (RCTs) among all kinds of study searched about forest healing. Selection literature and data extraction was performed by authors(SH Sun and SG Lee) independently. Total three studies were selected finally. The methodological quality in all study was low because of poor reporting. Study indications were metal health, depression, self-esteem, and stress. The scale of studies was very small, which was the level of pilot study. There were no description for obtaining informed consent and being reviewed by Institutional Review Board (IRB), and could be any problems for statistical method in any studies. It is difficult to accept the fact that each studies had the significant effect for study indications in the results of studies. It is concluded that the evidence that health healing have a significant effect is insufficient. Further systematic and methodological study and well-designed clinical trial will be needed.

어린이 의료시설의 치유공간적 특성에 관한 연구 -루돌프슈타이너와 막스 뤼셔의 이론에 근거한 행태지원성을 중심으로 (A Study on the Characteristics of Healing Space of Children Medical Facilities -Focused on the behavioral affordance based on the theory of Rudolf Steiner and Max L$\ddot{u}$scher)

  • 김혜연;김광호
    • 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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    • 제16권2호
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    • pp.37-45
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    • 2010
  • This study is the analysis of characteristics of hospital space for the holistic healing environment of children on the basis of the healing theory on emotion of Max L$\ddot{u}$scher and the healing theory on senses of Rudolf Steiner of the overseas children's hospitals. According to the theory of Rudolf Steiner, children make comprehensive advancement of physical, spirit and soul through the interaction of 12 senses. In addition, Max Luscher asserts that the psychological health can be maintained when the 4 emotional status in content, confidence, self-esteem and liberty make the balance. The 4 elements of Luscher have correspond with spatial expression elements for refuge, flow, prospect and void, and this is analyzed in conjunction with the eight kinds of behavior affordance of ying and yang (-, +) that helps our the advancement of 12 senses of Steiner. WORK & STUDY(+), REST(-), MOBILITY(+), VISUAL SEQUENCE(-), SOCIAL EXCHANGE(+), REFRESHMENT(-), COMMUNITY(+) and MEDITATION (-) would be the 8 kinds of behavioral affordances to make the healing environment as presented in this study and the case analysis for children's hospitals have been undertaken.