• 제목/요약/키워드: deductive model

검색결과 48건 처리시간 0.025초

자동차 Cooling Fan용 비등각 축류홴 소음해석 (Acoustic Analysis of Unevenly Pitched Fan of Automobile Cooling Pack System)

  • 송우석;이정수;김주용;이승배
    • 유체기계공업학회:학술대회논문집
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    • 유체기계공업학회 2004년도 유체기계 연구개발 발표회 논문집
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    • pp.567-571
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    • 2004
  • The 2-dimensional unsteady flows on and around the cambered airfoils were computed by applying LES with the deductive dynamic SGS model. The unsteady flow field were used as inputs to compute the far-field sounds and directivity patterns from rotating blades by a hybrid approach that exploits Farassat's formula. The BEM (Boundary Element Method) was applied to predict the frequency characteristics from the rotating blades for the cases of even- and uneven-pitched fans. The BEM results suggested that the unevenly pitched fan have less pronounced discrete peaks at BEF frequencies, which was confirmed by the experiment.

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FTA(Fault Tree Analysis)에서 불확실한 위험분석을 위한 퍼지모형 연구 (A Study Fuzzy model for Risk Analysis of Uncertainly FTA(Fault Tree Analysis))

  • 임총규;박주식;강경식
    • 대한안전경영과학회지
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    • 제4권1호
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    • pp.37-47
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    • 2002
  • Risk analysis is a formal deductive procedure for determining combinations of component failures and human errors that could result in the occurrence of specified undesired events at the system level. This method can be used to analyze the vast majority of industrial system reliability problems. This study deals with the application of knowledge-engineering and a methodology for the assessment & measurement of reliability, availability, maintainability, and safety of industrial systems using FTA(fault tree analysis), A fuzzy methodology for fault-tree evaluation seems to be an alternative solution to overcome the drawbacks of the conventional approach (insufficient Information concerning the relative frequencies of hazard events). To improve the quality of results, the membership functions must be approximated based on heuristic considerations, The purpose of this study is to describe the knowledge engineering approach, directed to integrate the various sources of knowledge involved in a FTA.

현대조경디자인의 추상유형에 관한 연구 (A Study on the Abstract Types of the Contemporary Landscape Design)

  • 김준연;이행렬;방광자
    • 한국조경학회지
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    • 제36권6호
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    • pp.1-11
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    • 2009
  • 본 연구는 현대조경의 추상유형에 관한 연구로서 현대조경의 탈장르적 경향과 건축, 조경, 예술 장르간의 하이브리드화에 의해 현대조경의 형태나 예술성은 과거의 픽쳐레스크식의 조경이 표현할 수 없었던 많은 부분들을 표현해 내고 있다. 이러한 영향으로 인해 현대의 조경은 한편의 거대한 추상예술을 보는 듯하고, 그 난해함은 정도를 더하고 있어 일반대중들 뿐만 아니라 전문 조경가들조차도 추상적 현대조경에 대한 해석이 분분하고 정확한 이해나 해석에 어려움을 토로하고 있어 현대조경의 추상성에 대한 연구가 제기되고 있다. 이에 본 연구는 조경, 건축, 미술 등 여러 다양한 예술분야에서 예술의 창작원리로 작용되어온 '추상성'에 대해 근본적인 탐구를 하여 추상에 대한 이론정립, 추상성 변천과정, 추상성의 현대적 의미를 파악하여, 조경학적 시각으로 각 예술분야와의 연계성을 밝히고 현대조경작가와 작품에서 표현되어 나타나는 추상형태, 추상언어, 추상특징을 추출해봄으로써 현대추상조경의 진리를 파악하고자 하였다. 본 연구를 통하여 현대조경의 추상유형은 다음과 같이 세 가지로 구분할 수 있다. $\cdot$연역적 추상조경(inductive abstract)은 논리적 과정에 의하지 않고 직관적이고 선험적인 정신성, 그리고 초월적 관념 표상을 의미하며 예술가의 내면의 세계 즉, 다시 말해서 외부 대상이 없이 예술가 자신의 관념이나 마음 속을 그리고자 하여 대상의 재현이 아닌 작가 내면의 표현 또는 표출되는 것이다. $\cdot$귀납적 추상조경(deductive abstract)은 전통적 사실주의에 입각하여 대상을 객관적 사실에 대해 지적이고 논리적인 사상(捨象)의 과정을 거쳐서 대상을 단순화하거나 왜곡, 과장, 확대된 논리적 조형성을 표현한다. $\cdot$복합적 추상조경(complex abstract)은 연역적 추상조경과 귀납적 추상조경이 복합적으로 나타난다. 이상으로 살펴본 바와 같이 현대조경의 추상유형에 관한 연구는 추상조경작품에 대한 가치를 재평가하는 계기가 될 수 있고 현대의 추상조경작품에 대한 이해를 높이며, 미래의 조경에 더욱 긍정적으로 작용할 것이다. 따라서 보다 심도 있는 연구와 이의 근본이 되는 추상성에 대한 연구는 앞으로도 지속되어야 한다.

A Case Study on the Implement of Teaching and Learning Models aiming at Training Creative Engineers: focused on the SICAT

  • KWON, Sungho;OH, Hyunsook;KIM, Sungmi
    • Educational Technology International
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    • 제11권1호
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    • pp.27-46
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    • 2010
  • The purpose of this paper is to apply the newly developed SICAT teaching and learning model to the actual scene of teaching and learning and draw a point of discussion for utilizing teaching and learning model, by uncovering the satisfaction of students and the inhibiting/facilitating elements when using the model. SICAT(Scientific Inquiry and Creative Activity with Technology; from here on SICAT), a teaching and learning model custom-built for engineering education, was developed, as more and more people paid attention to the demand for creative engineers. It was developed from the basis of PBL(Problem Based Learning), includes three sub-types which can be applied to the actual theory, design, and experimentation fields within engineering education. The three sub-types, which are ARDA(Analysis-Reasoning Activity & Discussion-Argumentation Activity), CoCD (Collaboration Activity & Capstone Design Activity), and ReSh(Reflection Activity & Sharing Activity), respectively support deductive and argumentation activities, creative design and collaboration activities, and retrospection and sharing activities. However, no research has been conducted to investigate whether or not there are inhibiting or facilitating elements in the application procedure, or what the rate of satisfaction for students is, when applying the SICAT model, which was newly developed to innovate existing engineering education, to the actual site of teaching and learning. Therefore, this research applied three types of SICAT teaching and learning models to the theory, design, and experimentation classes at the department of materials science and engineering at Hanyang University for eight weeks. After application, the students, teachers and tutors were surveyed and interviewed, and then the results analyzed in order to uncover inhibiting/facilitating elements and the rate of satisfaction. The satisfaction rate of students from the SICAT teaching and learning model was 3.78(in a perfect score of 5: The A type-3.65, The C type-3.80, The R type-3.90), and inhibiting/facilitating elements were drawn from the aspects of learning activities, support system. In conclusion, they can be contributed for implications of SICAT teaching and learning model universal use at engineering education in University.

보건간호사의 의사결정 유형과 지식 유형에 관한 실증연구 (Public Health Nurses유 Decision Making Models and Their Knowledge Structure)

  • 최희정
    • 대한간호학회지
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    • 제31권2호
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    • pp.328-339
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    • 2001
  • The purpose of this study was to describe decision making model of 180 public health nurses in Korea and their knowledge structure for decision making. The differences of decision making models by nurse's knowledge structure were also tested. Research concepts were measured using the instrument based on systemic and interpretive decision making approaches that were developed by Lauri & Salantera (1995). The results were as follows. 1. The public health nurses turned to, most commonly, a mixed practical-theoretical knowledge structure (45.9%), followed by practical knowledge (32%) and theoretical knowledge (22.1%). 2. The six different decision making models were identified. These were named for decision making theories and nursing process. These were client-oriented decision making, rule-oriented systemic decision making, wholistic and intuitive decision making, decision making depending on subjective view and experience, systemic decision making for defining problems. 3. The public nurses who had practical and practical-theoretical knowledge structure and community health practitioner (CHP) retold that decision making depends on subjective view and experience. Also the public health nurses who had 5~19 years clinical experience represented hypothetico-deductive decision making for defining problems.

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건강신념모델을 기반한 소규모 산업장 생산직 남성근로자의 대사증후군 감소 프로그램 개발을 위한 요구사정 (Health Belief Model-based Needs Assessment for Development of a Metabolic Syndrome Risk Reduction Program for Korean Male Blue-collar Workers in Small-sized Companies)

  • 박윤희;김두리
    • 한국직업건강간호학회지
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    • 제27권4호
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    • pp.235-246
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    • 2018
  • Purpose: This study aimed to comprehend the real context of metabolic syndrome-related factors of Korean male blue-collar workers from small-sized companies based on the health belief model. Methods: A total of 37 workers from three companies were interviewed, and three series of focus group interviews were conducted. Data were analyzed using deductive content analysis. Results: Data were classified into four categories: knowledge, perceived susceptibility and severity, perceived barriers, and beliefs. Knowledge referred to low knowledge level; perceived susceptibility and severity referred to unawareness of susceptibility and severity; perceived barriers referred to shift work, overtime work, and a social context including having no choice but to drink; and beliefs referred to believing that health promotion behaviors do not relate to preventing metabolic syndrome, believing that one cannot prevent metabolic syndrome oneself, and believing that professional help is required. Conclusion: To prevent and reduce the risk of metabolic syndrome among Korean male blue-collar workers, interventions should focus on strategies to increase metabolic syndrome-related knowledge and perceptions, social support, and self-efficacy for practicing health behaviors. In addition, it is necessary to develop policies for establishing a healthy drinking culture in companies.

Towards Sustainability of Single-Owner Entities: An Examination of Financial Factors That Influence Growth of Sole Proprietorship

  • MAKUDZA, Forbes;MANDONGWE, Lucia;MURIDZI, Gibson
    • 산경연구논집
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    • 제13권5호
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    • pp.15-26
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    • 2022
  • Purpose: There has been a consistent failure of businesses that are run by a single person. Most of these collapse at infancy prematurely and those that survive continue to operate at minimal capacity. The study thus sought to enhance growth of sole proprietors from being small entities to large corporates. Financial determinants of business growth were earmarked for research as they were amongst the grey areas of business growth research. Research design, data and methodology: The target population of the study was made up of groceries retail sole proprietors operating in Epworth, Zimbabwe. Questionnaires were used in a once-off cross-sectional survey using stratified random sampling. Through a deductive research approach, four financial determinants of business growth were established namely financial availability, financial management, financial evaluation and financial investment (AMEI). These constructs formulated the basis for the development of the model which linked financial factors to business growth. Results: The study found out that all four financial determinants were statistically significant (P < 0.05) in predicting business growth. Conclusions: The study concludes that the model tested was useful in explaining sole proprietor's business growth. Sole proprietors should have access to funding, manage received funds in an appropriate manner, invest into the business and evaluate their business processes.

도로부문 이산화탄소 배출량 추정 모델의 개발: 도로망, 건물규모, 건물용도의 공간배치를 중심으로 (A development of CO2 emission estimation model based on the spatial configuration of street networks, building capacity and building usages)

  • 김영욱;김경용;박훈태
    • 한국산학기술학회논문지
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    • 제15권6호
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    • pp.3879-3887
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    • 2014
  • 국내 교통부문 온실가스 총배출량 중 자동차 연료소비에 의한 $CO_2$ 배출량은 가히 절대적인 비율을 차지하고 있는 것으로 파악된다. 본 연구는 자동차, 그 중에서도 특히 승용차의 주행거리에 영향을 미치는 도시구성요소로서 도로망의 형태 그리고 건물규모와 건물용도의 공간적 배치에 주목하고, 이들 변수를 통해 승용차의 주행거리 및 $CO_2$ 배출량을 간접 추정하는 모델을 제안한다. 모델의 개발은 연역적 방식에 의한 수리모델의 구성, 시뮬레이션을 통한 모델 행태의 평가, 그리고 국내 5개 중소도시를 대상으로 한 실제 사례분석을 통해 모델을 조정하는 순으로 진행된다. 연료소비량에 기반한 하향식, 총량적 추정방식과는 대조적으로, 본 연구에서 제안되는 모델은 상향식, 미시적 성격을 갖는 것으로서, 도시구성요소 및 인간활동의 공간적 배치를 다루는 도시계획 및 설계 분야에서 그 활용도가 특히 높을 것으로 기대된다.

임상간호사의 비판적 사고 (Critical Thinking of Clinical Nurses)

  • 장성옥;신나미;김순용
    • 기본간호학회지
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    • 제16권4호
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    • pp.459-471
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    • 2009
  • Introduction: Critical thinking involves identifying problem(s), assessing resources, and generating possible solutions and allows clinical nurses to decide which solution is the most reasonable under the given circumstances, taking into consideration the "hat ifs" and how they will affect the end result. This research was conducted to further understanding and identification of subjective factors in critical thinking in clinical nurses. Methods: The research design was a Q-Methodological Approach. Q-population was formulated from a non-structured questionnaire and interviews from 17 experienced clinical nurses. Thirty selected Q-statements were sorted by 30 experienced clinical nurses. Results: Four factors for critical thinking were identified: (1) Deductive reasoning based on causal relation, (2) Construction of an effective model based on patients' responses, (3) Formulating categories based on priorities for effective interventions, and (4) Judging validity of the situational significance on clinical performances. Conclusion: Critical thinking is an attitude and reasoning process. From this study, the frame of reference for clinical nurses in formulating critical thinking within the context of clinical settings is identified and indicates the way nurses utilize thinking skills when they care for patients and areas that need further exploration as nurses and faculty develop education systems to advance clinical performance competency.

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디자인을 위한 지식기반시스템의 이론적 고찰 (A Theoretical Study on the Knowledge-Based System for Design)

  • 김태현
    • 한국실내디자인학회논문집
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    • 제7호
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    • pp.70-78
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    • 1996
  • Artificial Intelligence is generally concerned with tasks whose execution appears to involve some intelligence if done by humans, and knowledge-based system ( in other word, expert system) is the research about the specific domain. This concept also can be applied to interior design field. So the purpose of this study is in reconstructing the accomplishment of artificial Intelligence and knowledge engineering, searching basic theories and cased to knowledge engineering , searching basic theories and cases to formulate knowledge -based design system, and testing the posibilities how the design information can be dealt in computer system. Given that recognition , two major problems must be solved before knowledge-based CAD systems could be come practical : Firstly , identification of the interior of designers use .Secondly , representing this knowledge in a computationally effective manner. I had discussed the basic concepts on which to base a knowledge- based design model, knowledge representation schemes, and problem solving, I could find the possibility which the knowledge-based system can be applied to the interior design according to this study. But there are non-deductive, often irrational and now easily computerized design process in interior design. Those are problems which are relevant to the machine learning and the creativity in design. So there should be a lot of research about the machine learning and the creatively in design in order to construct successfully intelligent knowledge-based design system.

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