• 제목/요약/키워드: Natural Phenomena

검색결과 759건 처리시간 0.031초

마이크로셀룰라 경량 조습타일의 특성 고찰 (Investigation on the Properties of a Microcellular Light-Weighted Humidity Controlling Tile)

  • 송인혁;이은정;김해두;김영욱;윤달웅
    • 한국세라믹학회지
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    • 제48권5호
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    • pp.404-411
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    • 2011
  • The humidity controlling ceramic materials was developed by applying the phenomena of dew condensation in the capillary. It is said that the humidity range which human feels comfortable is from 40 to 70% in relative humidity. In this study, the ceramic tile using natural soils such as diatomite for interior wall was investigated. In particular, we had introduced novel processing routes for fabricating microcellular ceramics tile using hollow microsphere as a pore former. The microcellular pores in the humidity controlling ceramic materials showed the superior properties such as light-weight, heat insulation. The cell density was ${\sim}1.0{\times}10^9$ cells/$cm^3$ and density of sample was 0.65 g/$cm^3$ in the case of 1.71 wt% hollow microsphere content. Also, it is observed that the BET surface area and the pore volume of the sintered diatomite tile have the values of 40.92 $m^2$/g and 0.173 $cm^3$/g.

Computer-aided approach of parameters influencing concrete service life and field validation

  • Papadakis, V.G.;Efstathiou, M.P.;Apostolopoulos, C.A.
    • Computers and Concrete
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    • 제4권1호
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    • pp.1-18
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    • 2007
  • Over the past decades, an enormous amount of effort has been expended in laboratory and field studies on concrete durability estimation. The results of this research are still either widely scattered in the journal literature or mentioned briefly in the standard textbooks. Moreover, the theoretical approaches of deterioration mechanisms with a predictive character are limited to some complicated mathematical models not widespread in practice. A significant step forward could be the development of appropriate software for computer-based estimation of concrete service life, including reliable mathematical models and adequate experimental data. In the present work, the basis for the development of a computer estimation of the concrete service life is presented. After the definition of concrete mix design and structure characteristics, as well as the consideration regarding the environmental conditions where the structure will be found, the concrete service life can be reliably predicted using fundamental mathematical models that simulate the deterioration mechanisms. The prediction is focused on the basic deterioration phenomena of reinforced concrete, such as carbonation and chloride penetration, that initiate the reinforcing bars corrosion. Aspects on concrete strength and the production cost are also considered. Field observations and data collection from existing structures are compared with predictions of service life using the above model. A first attempt to develop a database of service lives of different types of reinforced concrete structure exposed to varying environments is finally included.

초기 한양도성계획의 도형적 해석에 관한 연구 (A Study on the Geometric Form of the Preliminary Plan "hanyang" in Early Chosun Dynasty)

  • 정기호;김용기
    • 한국조경학회지
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    • 제22권4호
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    • pp.119-132
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    • 1995
  • This study shows the characteristics of the early phenomena of the city plan Hanyang (old city Seoul). It consists of two steps. One is to search for the constructing principles of the geometric setting. And the other is to inquire and interpret the objects of beginning and ending points of that setting. The results based on geographic analysis and historical facts are as follows: 1) The city plan Hanyang shows a certain hierarchy:the major axis and the locations of the palace and the city set up in the prority. This priority made onto lower hierarchical plans such as the site plans of palaces and city wall. For example of the significant objects are Namdaemum (South Gate of the city wall) and Kwanghwamun (South Gate of the Palace). They are on the main axis, and became the basic points of the detailed city plans. 2) The palace palace on its major axis, right-angled minor axis, and 4 grade inclination to north. The four small city wall gates located on the base of four greater gates. 3) The geometric characteristics as constructing principle found on certain hierarchical order. Thus, the natural elements as mountains, had an important effect on the arrangement of major facilities and those main constructions made on lower - hierarchical settings. 4) These facts related closely to the philosophy of Jung, Do-Jon, the initiative planer of the Hanyang.

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조선조 궁궐조경양식에 나타난 유가.도가적 사상 (A Study on Confucian Philosophies and Taoist Docrine in the Landscape Style of Palaces in Chosun Dynasty)

  • 진상철;최기수
    • 한국조경학회지
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    • 제22권4호
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    • pp.81-93
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    • 1995
  • Landscape Style would take various influences in general. In that of Korean Palaces religious thinking has been caused he most important factor. This conceptual attitude has been derived from Confucian philosophies and the doctrines of Taoism, the realm of ideas that had constituted the schema of culture through long times in the Orient. This paper has dealt with the influences of one's outlook on the universe, antropocentricism, and on the relationships of man and nature in those two major teachings upon the landscape style of palaces in Chosun Dynasty. The Confucian philosophies and the doctrines of Taoism in Taosim in palaces would be summarized as followings: 1. The composition of exterior spaces had been understood as a place for moral training and political morality in the world view of Confucious. 2. The view point on court circle with plants and trees had directed to the influences of beauty upon the human spirit, and it is clear in naming attitude. 3. The composition type of void and solid in palaces would focused on the completion of Confucian thoughts totally, and the method of a unit space is same. 4. The double symbolic ideas could be find out in the components of exterior space; one is Confucian in phenomena, the other is Taoism in meaning. This can be cleared in Pangji(方池), layout of natural features, and in planting methods. As a conclusion, the common spiritual base in landscape architecture of Korean old palaces can be understood as two major thinkings; Confucian philosophies and the doctrines of Taoism.

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패션제품 쇼핑을 통한 리테일 테라피 효과에 대한 질적 연구 (Qualitative Research on Fashion Product Shopping and Retail Therapy)

  • 안가영;이유리
    • 한국의류학회지
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    • 제42권3호
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    • pp.411-427
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    • 2018
  • This study is to understand the inner psychological state of consumers who pursue a retail therapy effect through fashion product shopping. Qualitative research on the whole process from the point of time of occurrence of shopping motivation to the end of shopping motivation was performed. The researcher became a virtual shopping partner during shopping and conducted a natural conversation interview using a mobile instant messenger program (Kakao Talk). After shopping, participants were asked to write a diary on that day. Collected data were analyzed by applying the grounded theory approach suggested by Strauss and Corbin (1998). Casual Condition, represented everyday stress and Contextual Condition indicated the self-healing consumption trend. Main Phenomena showed a mood change during the fashion shopping process. The sense of emancipation from the place, the satisfaction from the maintenance of social relations, and the sense of accomplishment through purchases were revealed. Intervening Condition showed the consideration in the process of shopping for fashion products, such as providing a try-on experience, price promotion, and involvement of a companion. Action Interaction Strategy was the shopping behavior for the positive emotion increase and negative emotion decrease. Consequence represented a retail therapy in shopping for fashion products.

PC-KIMMO-based Description of Mongolian Morphology

  • Jaimai, Purev;Zundui, Tsolmon;Chagnaa, Altangerel;Ock, Cheol-Young
    • Journal of Information Processing Systems
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    • 제1권1호
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    • pp.41-48
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    • 2005
  • This paper presents the development of a morphological processor for the Mongolian language, based on the two-level morphological model which was introduced by Koskenniemi. The aim of the study is to provide Mongolian syntactic parsers with more effective information on word structure of Mongolian words. First hand written rules that are the core of this model are compiled into finite-state transducers by a rule tool. Output of the compiler was edited to clarity by hand whenever necessary. The rules file and lexicon presented in the paper describe the morphology of Mongolian nouns, adjectives and verbs. Although the rules illustrated are not sufficient for accounting all the processes of Mongolian lexical phonology, other necessary rules can be easily added when new words are supplemented to the lexicon file. The theoretical consideration of the paper is concluded in representation of the morphological phenomena of Mongolian by the general, language-independent framework of the two-level morphological model.

다산(茶山) 역학(易學)의 의학적 응용 (Study on Application of Dasan's I Ching for Oriental Medicine)

  • 임명진;김병수;강정수
    • 동의생리병리학회지
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    • 제19권2호
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    • pp.347-357
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    • 2005
  • The medicine through I Ching(The Book of Changes, 易經) is a field of the medical science, which studies physiology, pathology and Yin-Yang philosophy. From ancient times so many scholars have studied I Ching and they are divided into two different school. one is the school of Image and Number(象數學派), the other is the school of reason(義理學派). Dasan Jung Yak-Yong(茶山 丁若鏞) is a distinguished scholar in the I-Ching study, and he had a unique opinion in the analysis about sentences of I Ching. He has done his best to make 'Image and Number(象數)' harmonize with reason(義理). I Ching is the book about changes, which includes everything like natural phenomena, human body and mind. So we can understand human physiology and pathology through I Ching.

위성원격탐사와 지구과학 - 위성해양학 - (Satellite Remote Sensing and Earth Science -Satellite Oceanography-)

  • 윤홍주
    • 대한원격탐사학회지
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    • 제15권1호
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    • pp.51-60
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    • 1999
  • 오늘날 위성원격탐사의 제분야는 새로운 첨단과학기술로서 지구과학분야에서 중요한 자리메김을 하고 있다. 1998년은 UN이 제정한 세계해양의 해이다. 따라서 이를 기념하여 위성해양학에 관련되는 사항들을 재정리해보고 나아가 해양수산의 과학기술분야 관련 전문종사자들에게 새롭게 알리는 것도 매우 의미 있는 일이라 하겠다. 아울러 본 총설은 끝부분에 기재한 위성원격탐사와 관련된 여러 서적들을 참고로 하여 편술하였음을 밝혀둔다.

공동주택 침기의 불확실성 분석 (Infiltration in Residential Buildings under Uncertainty)

  • 현세훈;박철수;문현준
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2006년도 하계학술발표대회 논문집
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    • pp.369-374
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    • 2006
  • Quantification of infiltration rate is an important issue in HVAC system design. The infiltration in buildings depends on many uncertain parameters that vary with significant magnitude and hence, the results from standard deterministic simulation approach can be unreliable. The authors utilize uncertainty analysis In predicting the airflow rates. The paper presents relevant uncertain parameters such as meteorological data, building parameters (leakage areas of windows, doors, etc.), etc. Uncertainties of the aforementioned parameters are quantified based on available data from literature. Then, the Latin Hypercube Sampling (LHS) method was used for the uncertainty propagation. The LHS is one of the Monte Carlo simulation techniques that is suited for our needs. The CONTAMW was chosen to simulate infiltration phenomena in a residential apartment that is typical of residential buildings in Korea. It will be shown that the uncertainty propagating through this process is not negligible and may significantly influence the prediction of the airflow rates.

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2년후에 발거가 가능했던 기관 cannula 발거곤란병 (A Successful Decannulation Case Two Years Later A Tracheostomy)

  • 이종원;김종영;김성곤;권령춘;양한모
    • 대한기관식도과학회:학술대회논문집
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    • 대한기관식도과학회 1976년도 제10차 학술대회연제 순서 및 초록
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    • pp.87.3-87
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    • 1976
  • 병례 환자 : 강○종 4세 남자, 주소 : 기관 cannula 발거시의 호흡곤란, 병력 : 래원 2년전 소아과에서 기관절개술을 받았으며, 기관절개술 1개월후에 기관 cannula 발거곤란병으로 재수술을 받았음. 경과 : 양친에 의해 cannula corking 하에서 정상기도를 통한 호흡연습을 하여 1976년 3월 16일 본 교실에서 아무런 후유증 없이 기관 cannula를 발거하여 2일후 퇴원하였음. 2년간 기관 cannula의 발거가 곤란했던 5세 남아에서 기관 cannula 발거후 아무런 지장이 없었던 1례를 경험하였기에 보고한다. 정상기도를 통한 호흡곤란이 내외과적 수단을 가하지 않고 2년후에 기관 cannula의 발거가 가능했다는 사실은 1종의 자연치료현상으로 보아야 할 것이다. 물론 high tracheostomy로 인하여 cricoid cartilage의 손상, perichondritis, granulation 및 성문하종창의 동반이 있었다. 이러한 호흡곤란이 성장에 수반되는 기관성장이나 cannula corking 하에서 정상기도를 통한 꾸준한 호흡연습이 2년후에 기관 cannula의 발거를 가능케 했다고 볼 수도 있으나 암의 자연치료현상을 면역으로 설명하는 것과 같이 이러한 병례도 면역에 의한 자연치유나 unknown factor 등을 부가하여 생각할 수도 있겠다.

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