• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.1222-1229
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• 1993

An advanced design environment , which is based on adaptive and knowledge -based finite elements (INTELMESH), has been developed. Unlike other approaches, INTEMMESH incorporates the information about the object geometry as well as the boundary and loading conditions to generate an ${\alpha}$-priori finite element mesh which is more refined around the critical regions of the problem domain. INTEMMESH is designed for planar domains and axisymmetric 3-D structures of elasticity and heat transfer subjected to mechanical and thermal loading . It intelligently identifies the critical regions/points in the problem domain and utilize the new concepts of substructuring and wave propagation to choose the proper mesh size for them. INTEMMESH generates well-shaped triangular elements by applying trangulartion and Laplacian smoothing procedures. The adaptive analysis involves the intial finite elements analyze and an efficient ${\alpha}$-posteriori error analysis involves the initial finite element anal sis and an efficient ${\alpha}$-posteriori error analysis and estimation . Once a problem is defined , the system automatically builds a finite element model and analyzes the problem though automatic iterative process until the error reaches a desired level. It has been shown that the proposed approach which initiates the process with an ${\alpha}$-priori, and near optimum mesh of the object , converges to the desired accuracy in less time and at less cost. Such an advanced design/analysis environment will provide the capability for rapid product development and reducing the design cycle time and cost.

• 정보관리학회지
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• 제26권4호
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• pp.7-34
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• 2009

이야기 쓰기를 돕는 본문 및 문장 검색시스템의 구축을 위해서 (1) 이야기와 단락 및 문장의 구조를 분석하고 (2) 색인작성과 탐색 질문에 적용되는 언어 추론을 연구하였다. 이야기 쓰기에 필요한 이야기, 단락, 그리고 문장으로 구성된 사항 데이터베이스와 필요한 추론규칙으로 이루어진 지식베이스와 온톨로 지가 고안되었다. 추론의 기초인 실례(實例) 파일들은 시맨틱 웹 환경에서 작동될 마크업 언어 형식으로 만들어졌다. 시맨틱 웹 환경에서 실용적인 시스템이 되려면 단락과 문장을 정확히 대변하는 색인 방법론과 이를 정밀하게 지식베이스화 할 수 있는 마크업 언어의 창조가 필수적이라 사료된다.

• 한국주거학회논문집
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• 제25권2호
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• pp.63-70
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• 2014

The dependence on cars for urban mobility and the exponential increase in traffic and urban infrastructure to sustain traffic have lead to an encapsulated way of life, where the connection with the natural environment is much more reduced and programmed. In a previous study, a process based on estimating distances showed that children who move around their city by automobile do not appreciate their environment as a spatial continuum, but rather as a series of independent spaces that are reached by automobile or bus, thereby evidencing a different way of conceptualizing urban space in the light of different cognitive structures (Goluboff, Garc$\acute{i}$a-Mira, and Garc$\acute{i}$a-Font$\acute{a}$n, 2002). The present study is concerned with the process of understanding and knowledge of urban space, and contrasting the cognitive structure of different groups. The implications that this study may have for urban planning are discussed.

• Journal of Construction Engineering and Project Management
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• 제7권3호
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• pp.26-38
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• 2017

The architecture, engineering, and construction (AEC) industry is yet to formulate a holistic strategy to realign the evolving technological infrastructures with organisational ambitions and adaptive knowledge of the workforce. This study attempts to create an understanding of the underlying processes adopted by technology-enhanced construction organisations to disseminate and maintain knowledge within the workforce in order to keep pace with the evolving construction technologies. The study adopted expansive learning and adaptive expertise constructs to help better explain workplace learning support structures for organisational effectiveness in a turbulent situation. The two theories were tailored to empirically evaluate three case study construction organisations that have embarked on technology-enabled organisational changes. The study concluded on the creation of a facilitating workplace learning environment to enable the workforce to adapt into and resolve any inherent contradictions and cognitive ambiguities of the changing organisational conditions. This could ensure that novel and conflicting features of the emerging technologies can be adapted across the myriad multi-functional project activities in order to expand the frontiers of the technological capabilities to address the eminent issues confronting the AEC sector.

• Nuclear Engineering and Technology
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• 제46권1호
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• pp.11-26
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• 2014

The analyses carried out within the Seismic Probabilistic Risk Assessments (SPRAs) of Nuclear Power Plants (NPPs) are affected by significant aleatory and epistemic uncertainties. These uncertainties have to be represented and quantified coherently with the data, information and knowledge available, to provide reasonable assurance that related decisions can be taken robustly and with confidence. The amount of data, information and knowledge available for seismic risk assessment is typically limited, so that the analysis must strongly rely on expert judgments. In this paper, a Dempster-Shafer Theory (DST) framework for handling uncertainties in NPP SPRAs is proposed and applied to an example case study. The main contributions of this paper are two: (i) applying the complete DST framework to SPRA models, showing how to build the Dempster-Shafer structures of the uncertainty parameters based on industry generic data, and (ii) embedding Bayesian updating based on plant specific data into the framework. The results of the application to a case study show that the approach is feasible and effective in (i) describing and jointly propagating aleatory and epistemic uncertainties in SPRA models and (ii) providing 'conservative' bounds on the safety quantities of interest (i.e. Core Damage Frequency, CDF) that reflect the (limited) state of knowledge of the experts about the system of interest.

• Steel and Composite Structures
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• 제31권4호
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• pp.409-417
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• 2019

The choice of individual material for industrial application is primarily based on knowledge of its behavior in similar applications and similar environmental conditions. Contemporary design implies knowledge of material behavior and knowledge in the area of structural analysis supported by large capacity computers. Bearing this in mind, this paper presents and analyzes the experimental results related to the mechanical properties of the material considered (30CrNiMo8/1.6580/AISI 4340) at different temperatures as well as its creep and fatigue behavior. All experimental tests were carried out as uniaxial tests. The test results related to the mechanical properties are presented in the form of engineering stress-strain diagrams. The results related to the creep behavior of the material are shown in the form of creep curves, while the fatigue of the material is shown in the form of stress - life (S - N) diagram. Based on these experimental results, the values of the following properties are determined: ultimate tensile strength (${\sigma}_{m,20}=696MPa$), yield strength (${\sigma}_{0.2,20}=355.5MPa$), modulus of elasticity ($E_{,20}=217GPa$) and fatigue limit (${\sigma}_{f,20,R=-1}=280.4MPa$). Results related to fatigue tests were obtained at room temperature and stress ratio R = -1.

• 한국컴퓨터정보학회논문지
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• 제27권9호
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• pp.77-89
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• 2022

본 논문에서는 RML 매핑 방식으로 구축한 RDF 지식 그래프의 구조를 묘사하고 검증할 용도의 SHACL 스키마를 자동으로 생성하는 시스템을 제안한다. 제안하는 시스템은 기존 연구와는 달리 RML 매핑 규칙 뿐만 아니라 RML 매핑의 입력인 CSV, JSON, XML, 데이터베이스와 같은 다양한 포맷의 데이터에서 추출한 메타데이터도 함께 사용하여 스키마를 생성한다. 따라서 기존 연구 기반의 스키마에서는 부재했던 데이터 타입, 문자열 길이, 값의 범위, 차수 관련 제약 조건이 스키마에 포함된다. 그리고 기존 연구에서 간과한 소위 반복된 속성 문제를 제안하는 시스템은 해결한다. 297개의 케이스로 구성된 적합성 테스트를 통해 제안된 시스템이 그래프에 대한 올바른 제약 조건을 생성함을 보여준다. 제안된 시스템은 오류가 발생하기 쉬운 기존 수동 검증 프로세스를 자동화하는 데 기여할 수 있다.

• Journal of Information Processing Systems
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• 제19권1호
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• pp.55-66
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• 2023

Community portraits can deeply explore the characteristics of community structures and describe the personalized knowledge needs of community users, which is of great practical significance for improving community recommendation services, as well as the accuracy of resource push. The current community portraits generally have the problems of weak perception of interest characteristics and low degree of integration of topic information. To resolve this problem, the reader community portrait method based on the thematic and timeliness characteristics of interest labels (UIT) is proposed. First, community opinion leaders are identified based on multi-feature calculations, and then the topic features of their texts are identified based on the LDA topic model. On this basis, a semantic mapping including "reader community-opinion leader-text content" was established. Second, the readers' interest similarity of the labels was dynamically updated, and two kinds of tag parameters were integrated, namely, the intensity of interest labels and the stability of interest labels. Finally, the similarity distance between the opinion leader and the topic of interest was calculated to obtain the dynamic interest set of the opinion leaders. Experimental analysis was conducted on real data from the Douban reading community. The experimental results show that the UIT has the highest average F value (0.551) compared to the state-of-the-art approaches, which indicates that the UIT has better performance in the smooth time dimension.

• 한국의류학회지
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• 제37권2호
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• pp.125-137
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• 2013

This study investigated the conceptual constructs of ethical consumption beliefs and their impacts on the consumer attitudes toward eco-friendly faux leather apparel goods. The mediating roles of perceived consumer effectiveness and apparel environmental knowledge were examined in this research. A survey was conducted on female consumers between the ages of 20 and 50; subsequently, 300 responses were analyzed. The results of this study were follows: 1) The results of factor analysis and the reliability test on ethical consumption beliefs clearly showed factorial structures that include Social Responsibility, Eco-friendly Consumption, Animal Welfare, and Individual Enhancement. 2) The results of the mean scores of ethical consumption beliefs showed that respondents tended to consider Social Responsibility more important than the other three factors. Ethical consumption beliefs showed a significantly positive influence on consumer attitudes toward eco-friendly faux leather apparel products; in addition, Social Responsibility had the highest effect on product attitudes among the four factors of ethical consumption beliefs. 3) The perceived consumer effectiveness and environmental knowledge of apparel had important medicating roles in the relation-ship between ethical consumption beliefs and attitudes towards eco-friendly faux leather apparel products. This study highlighted a potential marketability of eco-friendly faux leather apparel products and that ethical consumption beliefs, perceived consumer effectiveness, and apparel environmental knowledge should be promoted among consumers to increase favorable attitudes towards these products.

• 대한수학교육학회지:수학교육학연구
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• 제24권4호
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• pp.555-572
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• 2014

본 고는 초등 교사를 위한 한국의 12개 교사교육대학과 미국의 9개 대학의 교육과정을 비교하여, 전문직 교육으로서 한국의 수학교사교육을 위한 시사점을 찾는 것을 목적으로 한다. 교사교육의 목적, 교육과정 구성의 원리, 대학이 제공하는 강좌 구성, 그리고 수학 교수의 학습 기회의 네 가지 관점에서 교육과정을 비교 분석하였다. 두 나라의 교육과정은 교과목 지도를 특히 강조하며, 궁극적으로 초등학생들의 학력신장을 목적으로 한다. 이러한 목적하에 두 나라의 초등교사 교육과정을 전체 구조는 유사하지만, 수학교수의 학습기회라는 관점에서 교육과정이 제공하는 내용은 매우 상이한 양상을 보이고 있었다. 두 나라의 교육 및 교사에 관한 매우 다른 사회문화적 관점과 상황 때문에 다른 교사교육과정을 실행하는 것은 당연한 결과이다. 그러나, 여러 연구 결과에서 증명하듯 교수를 위한 수학지식은 학생들의 수학 성취도 및 교사들의 교수와 결정적 관련이 있다. 따라서 체계적이고 안정된 체계로서 운영되고 있는 한국의 교사교육과정의 운영에 있어서 교수를 위한 수학 지식을 중요한 요소로서 고려해야할 필요가 있다.