• 한국정밀공학회지
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• 제18권5호
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• pp.57-64
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• 2001

The high speed in the wire-drawing process to meet the demands for the increased productivity has a great effect on the heat generated due to plastic deformation and friction between the wire and the drawing dies. During the high carbon steel wire drawing process, the temperature rise gives a great influence to the fracture of wire. In this paper, to control the temperature rise in the wire after the deformation through the drawing die, the calculation method of the wire temperature, which includes the temperature rise in the deformation zone as well as the temperature drop in the block considering the heat transfer among the wire, cooling water and surrounding air, is proposed. These calculated results of the wire temperature at the inlet and exit of the drawing die at each pass are compared with the measured wire temperatures and verified its efficiency. So, using the program to predict the wire temperature, the isothermal pass schedule program was developed. By applying this isothermal pass schedule program to the conventional process condition, a new isothermal pass schedule is redesigned through all passes. As a result, the possibility of wire fracture could be considerably reduced and the productivity of final product could be more increased than before.

• 한국CDE학회논문집
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• 제1권3호
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• pp.177-188
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• 1996

An approach to providing computational support with an expert shell is discussed with the scope of an industrial wire harness design, especially at a manufacturing stage. Key issues include the development of an architecture that supports a frequent design change among engineers associated with different parts of the wiring design process and the development of hierarchical representations that capture the different characteristics (e.g., connectivity, configuration) of the harnesses. The abstraction of design information results in features, while the abstraction of drawing elements leads to the definition of objects. These abstractions are essential for efficient transactions among people and computer tools in a domain that involves numerous interacting constraints. In this paper the strategy for the problem decomposition, the definition of features, and the ways in which features are shared by various operations and design changes, are discussed. We conclude with a discussion of some of the issues raised by the project and the steps underway to address them.

• 아동학회지
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• 제16권1호
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• pp.79-88
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• 1995

The purpose of this study was to investigate whether the experience of computer programming in Logo geometry advances the development of young children's concepts and/or representation of Euclidian spatial relations, particularly their concepts of the vertical-horizontal. Papert's claim of the positive effects of Logo programming experiences on young children's cognitive development was tested using the Piagetian Water Level Test (PWLT), the Free Hand Drawing Test (FHDT), and the Computer Drawing Test (CDT). Forty-four subjects were drawn from 2nd graders attending a public elementary school in Ithaca. The subjects were divided into 2 groups: a treatment group (TG) with Logo training for 10 weeks and a control group (CG) without Logo training. Our results showed that TG did not make any significant improvement on PWLT. In contrast, TG outperformed CG on FHDT. We suggested several possible explanations for this contradiction.

• Journal of Community Nutrition
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• 제5권4호
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• pp.195-208
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• 2003

Drawing from journal articles, community nutrition textbooks, government documents, national conference reports, the author's own work in community programming, and discussions with practicing Community Nutritionists, this article illuminates the scope and character of community nutrition in the United States. It traces the roots of community nutrition in home economics, nutrition, education, communication, social and behavioral sciences, and describes the evolution of theory. And finally it suggests issues to be addressed by community nutrition researchers and practitioners through collaborations that integrate perspectives within community nutrition and strategically cross disciplinary boundaries. These include： 1) theory development and application in research and practice within philosophically consistent perspectives； 2) methodological development (qualitative and quantitative) drawing from the social and behavioral sciences that apply to community nutrition； 3) taking a long view of community nutrition and recognizing that change requires integrated efforts over long periods of time； 4) engaging community stakeholders in research as well as program planning and 5) engaging with community nutritionists from other countries for cross-cultural research and conceptualization. This journal and the Korean Society for Community Nutrition, as the only journal and society expressly devoted to community nutrition, would be the best context for such collaborations.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1992년도 춘계학술대회 논문집 92
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• pp.71-82
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• 1992

The frictional characteristics of Zn-Ni coated steel sheets were investigated by draw bead test and strip draw test. In strip draw test, the frictional characteristics were evaluated by the drawing force ratio (Tc/Ts) for half coating-stripped specimens. It is clarified that the drawing force ratio obtained by strip draw test is a convenient parameter compared to coefficient of friction obtained by draw bead test to evaluate the frictional characteristics of Zn-Ni coated steel sheets.

• 한국지역지리학회지
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• 제6권3호
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• pp.83-99
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• 2000

이 논문의 연구목적은 초등학교 아동의 사회 교과서 내용 중 지리영역 학습내용구성의 개선에 기여할 수 있는 기초자료를 제공하는 데 있다. 이러한 목적을 위하여 공간인지발달이론을 초등학교 학생의 그림분석을 통해 검증하였다. 분석의 결과, 공간의 조작능력은 연령의 종가와 더불어 형상적 공간에서 투영적 공간을 거쳐 기하학적 공간을 조작하는 과정으로 진행됨을 알 수 있었다. 이는 피아제와 인헬데르의 인지발달이론에서 주장하는 바와 일치하였다. 그러나 그들이 제시한 각 조작기별 해당 연령은 실제와 비교하면 조작기 구분의 엄밀한 기준이 되지 않음을 보여 주었다. 그 이유는 같은 연령의 아동간에도 현격한 개인차를 지니기 때문이다. 이와 같은 연구의 결과는 지리 교육적으로 다음과 같은 시사점을 제공한다: 첫째, 초등학교 3학년 교과서의 내용 중 사진과 그림지도와 삽화 등이 아동의 지적 수준에 맞는지 의문스럽다. 둘째, 3학년 아동에게 그림지도를, 4학년 아동에게 실측도와 유사한 지도를 직접 그리게 하는 것은 기하학적 공간의 조작에 속하므로 큰 무리가 따른다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 추계 학술논문 발표대회
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• pp.64-65
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• 2015

As construction projects have increased in size and height recently, lifting accounts for increasingly greater portion and tower cranes are used more frequently. At present, the selection and arrangement of tower crane are depend on the experience of experts. However, since the number of experts is fairly limited and a database for tower cranes regarding lifting capacity, operation properties, rent, etc has not been widely employed, tower cranes are often not effectively selected and arranged which can cause cost overruns and delays in the lifting work. To address such issues, this study attempts to perform a basic study for development of automatic arrangement algorithm of tower crane using drawing recognition. If relevant database is established and the algorithm suggested in this study is refined more systematically, even beginning level engineers will be able to plan tower crane arrangement in a way comparable to experienced experts.

• 한국전자통신학회논문지
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• 제8권12호
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• pp.1933-1940
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• 2013

최근 컴퓨터 성능 향상 및 정보 기기의 발달로 모바일 증강현실은 급속한 발전을 이루고 있다. 그러나 대부분 콘텐츠가 수동적이거나 대화식이라 하더라도 제한적인 자유도만 주어져 사용자들에게 흥미와 몰입을 부여하기에는 한계점이 존재한다. 본 논문에서는 비전기반 증강현실 시스템과 데이터베이스 관리 시스템 연동을 통한 기존 증강현실 시스템을 보강하여 현실세계와 가상세계의 양방향 통신이 가능하도록 인터랙션 UI를 개선하여 활용성을 높이도록 모바일 증강현실 기반의 2D도면 인터랙션 UI 시스템을 설계한다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.863-867
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• 2008

VE는 원가절감, 공기단축, 품질향상, 안전성 향상이라는 네 가지 측면을 모두 만족시킬 수 있는 최적의 방법이다. 설계VE의 중요성은 계속 부각되고 있으며, VE 업무를 효율적으로 수행할 수 있는 방법에 관한 연구가 요구된다. 따라서, 본 연구에서는 VE 업무를 효율적으로 수행할 수 있도록 도와줄 수 있는 설계VE 점검 체크리스트 개발방법을 제시하고자 한다. 체크리스트의 개발방법은 도면정보의 범주화를 통해 주요 요소들을 도출하고, 도출된 요소들을 바탕으로 체크리스트 항목을 작성한다. 작성된 항목을 바탕으로 공종별 전문가 검토를 통해 설계VE 점검 체크리스트를 개발한다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 봄 학술논문 발표대회
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• pp.227-228
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• 2022

In order to achieve the goal of cost management, which is one of the three major management goals of building production, this paper introduces an approximate cost estimating automation technology in the design stage as the importance of predicting construction costs increases. BIM is used for accurate estimating, and the quantity of structural members and finishing materials is calculated by creating a 3D model of the actual building. However, only 2D basic design drawings are provided when making an estimating. Therefore, for accurate quantity calculation, digitization of 2D drawings is required. Therefore, this research calculates the quantity of concrete structural members by calculating the area for the recognition area through 2D drawing recognition technology incorporating computer vision. It is judged that the development technology of this research can be used as an important decision-making tool when predicting the construction cost in the design stage. In addition, it is expected that 3D modeling automation and 3D structural analysis will be possible through the digitization of 2D drawings.