• 대한기계학회논문집A
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• 제21권5호
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• pp.800-808
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• 1997

Decision process for length dimension in the mechanical system design process has been studied with a washing machine transmission as a model. The results are, (i) the length dimensions of the non-shaft elements are independent of other elements, (ii) the length dimensions of the shaft elements are dependent on the dimensions of the non-shaft elements located inside and outside of that elements, (iii) the length dimensions of the inner shaft elements are dependent on those of the outer shaft elements located parallel, (iv) the length dimensions of the shaft elements located serial are independent of each other.

• 디자인학연구
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• 제4권1호
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• pp.31-37
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• 1991

Process of thinking on the form in product design includes the process in which unclear requirements are transformed into defined concepts, and the process in which the design as a form conforming to the concepts in conc1uded.(The former is called fconceptualizationJ which deals with abstract matters, and the latter "manipulation of the formJ which deals with more embodied matters) In conceptualization process the operation which transform the diverse requirements in the initial phase of de\ulcornersign to related linguistic expressions or to an image that directly suggests the form is executed. In the process of manipulation of the form the transformation to design as the description of relationships between the formal elements of the design solution resulted from the transformed requirements. It is the job of selecting the most suitable formal elements, balancing the relationships between them, out 01 the possibilities that reside in the individual attributes of formal elements, and finally leading to the design as the end solution. This writing focuses down to the wilfulness and ambiguity of design, and the diversity of design solution after the requirements, formal elements, and the process of relating the formal attributes to each other is built up the two phases.ases.

• 과학교육연구지
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• 제33권2호
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• pp.271-289
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• 2009

이 연구는 생물학자와 과학영재의 실험설계활동에서 나타나는 과정요소와 특성을 분석한 것이다. 연구대상으로 동물행동생태를 전공한 생물학자 4명과 과학영재 생물반 학생 32명을 선정하였고, 연구를 위해 주어진 과제는 Fowler(1990)의 DCT이다. 그들의 실험설계활동과 관련된 모든 자료를 수집하였고, 이 자료를 분석하기 위한 분석틀을 개발하였다. 분석 결과, 첫째, 생물학자와 과학영재의 실험설계활동에서 나타난 과정요소는 문제 확인, 준비물 열거, 실험대상에 대한 고려, 변인 탐색, 변인 소거, 변인 선택, 변인 조작 방법 계획, 환경적 변인 통제 계획, 생물적 변인 통제 계획, 관찰 측정 방법 계획, 자료 수집 계획, 자료 해석 계획, 실험의 반복 계획, 측정의 반복 계획, 안전 수칙으로 총 15가지가 있다. 생물학자는 특정한 과정요소에 집중하는 반면, 과학영재는 정형화된 과정요소를 나타냈다. 둘째, 생물학자와 과학영재의 실험설계활동에서 나타난 특성을 종합하면 다음과 같다: 1) 생물학자와 과학영재 모두 영역특수적인 과정기술이 포함된 과정요소를 나타냈다. 2) 생물학자는 특정한 과정을 반복적으로 점검하면서 정교하게 실험을 설계하는 반면, 과학영재는 피상적으로 실험을 설계한다. 3) 생물학자는 영역특수적인 기술과 노하우를 가지고 있으나, 과학영재는 그렇지 않다. 이러한 결과는 과학영재의 실험설계활동 교육 프로그램은 생물학자들이 집중하는 과정요소를 중심으로 구성하고, 정교한 실험 설계를 할 수 있도록 피드백을 제공하고, 생물학자의 과정기술이나 노하우를 학습할 수 있는 형태로 개발되어야 함을 시사한다.

• 대한지구과학교육학회지
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• 제7권3호
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• pp.371-380
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• 2014

The purpose of the research was to analyze the characteristics which appeared to the process of designing experiment for pre-service elementary teachers. This study were participated 26 pre-service elementary teachers. The findings indicated that first, the researcher figured out the process elements could constructed in 12 elements such as 'states problem or question, predicts outcome or hypothesizes, lists materials needed, arranges steps in sequential order, lists more than 3 steps, Explore variables and select one or more variables, plans to control variables, plans to measure and observation, plans data collection, plans to repeat testing and tells reason, states plan for interpreting data, states plan for making conclusion based on data, states plan for making conclusion based on data' but did not figure out 2 elements such as 'defines the terms of the experiment, practice safety'. second, the characteristics of pre-service elementary teachers in the process of designing experiment were as follows; pre-service elementary teachers designed experiments unstructured process listed types and showed the superficial level of the design experiment. The results show that the programs of designing experiment activity should be constructed with the process elements which were concentrated by pre-service elementary teachers, should provide feedbacks to design experiment more accurately.

• 한국생산제조학회지
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• 제20권3호
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• pp.329-334
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• 2011

The characteristic of sheet metal process is the few loss of material during process, the short processing time and the excellent price and strength. The static implicit finite element method is applied effectively to analyze stamping processes from using AutoForm software. The simulation analysis can be applied to the membrane elements and shell elements. Membrane elements can be applied to good efficiency, but lower than the accuracy of shell elements. Therefore, simple drawing process applies membrane element, and spring-back and analysis of stamping process are judged that it is most efficient that apply shell clement. This study, the simulated results for stamping processes are shown and discussed.

• 산업공학
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• 제13권2호
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• pp.234-245
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• 2000

In this paper, the conceptual framework of IBS(Intelligent Building Systems) is redefined, and we propose two ANP(Analytic Network Process) models for ranking IBS. Traditional models have ranked IBS according to technical features or the number of elements in IBS. But, we consider relative functional importance among IBS elements for efficient building operation. According to the structure of interactive-relationship among IBS elements, we present two types of model. The one is Model A that is composed of both hierarchical and network structures. It has $12{\times}12$ supermatrix consists of interdependent relationship between 6 benefit elements(Productivity, Saving, Safety, Convenience, Pleasantness, Environment Affinity) and 6 IBS elements(Building Operation, Security, Safety, Telecommunication(TC), Office Automation(OA), other elements). Each of 6 IBS elements has subelements in hierarchical structure. The other is Model B that has $25{\times}25$ supermatrix consists of interdependent relationship between 6 benefit elements and 19 IBS sub elements. Merits and demerits of each model are discussed in detail.

• 한국전자거래학회지
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• 제3권2호
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• pp.179-202
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• 1998

This study reviews the concept of Integrated Logistic Support(ILS), ILS standards, ILS elements, and the processes of developing ILS elements and Logistics Support Analysis(LSA). It also examines the potentials of applying ILS development process to building CALS systems in commercial sectors in order to accomplish business process innovation and achieve life-cycle cost savings in product and equipment management. In order to utilize the ILS approach for commercial industries, we need customizing the process of Logistics Support Analysis defined in MIL-STD-1388-lA. The success of ILS implementation depends on the determination of the range of ILS elements in relation with the application environment, and the appropriate development of those elements. During the development process, in order to analyze and design logistics flow processes and supporting activities, we suggest the object-oriented logistics process modeling approach with basic concepts and constructs embedded in objects. Several diagrams including Class Diagram, Class-Instance Diagram, and Integrated Instance Diagram, are provided. Simple Steps to follow are suggested for the analysis and design of inter-organizational logistics flow and support processes. The outcomes of the study are expected to contribute to stimulating the utilization of ILS concepts and development process during building commercial CALS systems.

• Journal of the Korean Statistical Society
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• 제26권2호
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• pp.231-243
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• 1997

In this paper we investigate weak convergence of the intergral processes whose index set is the non-compact infinite time interval. Our first goal is to develop the empirical central limit theorem as random elements of [0, .infty.) for an integral process which is constructed from iid variables. In developing the weak convergence as random elements of D[0, .infty.), we will use a result of Ossiander(4) whose proof heavily depends on the total boundedness of the index set. Our next goal is to establish the empirical central limit theorem for the Kaplan-Meier integral process as random elements of D[0, .infty.). In achieving the the goal, we will use the above iid result, a representation of State(6) on the Kaplan-Meier integral, and a lemma on the uniform order of convergence. The first result, in some sense, generalizes the result of empirical central limit therem of Pollard(5) where the process is regarded as random elements of D[-.infty., .infty.] and the sample paths of limiting Gaussian process may jump. The second result generalizes the first result to random censorship model. The later also generalizes one dimensional central limit theorem of Stute(6) to a process version. These results may be used in the nonparametric statistical inference.

• 한국광학회:학술대회논문집
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• 한국광학회 2000년도 하계학술발표회
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• pp.42-43
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• 2000

Aspheric optical elements can provide an advantage in the design of optical system that require high performance and small size. The main disadvantage of high volume production of aspheric optical elements is very high cost. In this paper, we suggest new technology of high volume production process using replication process. The replication is a thin film of UV cured resin on a solid substrate blank(polymer substrate) with aspheric surface.

• Journal of information and communication convergence engineering
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• 제8권4호
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• pp.461-465
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• 2010

This paper describes the design method of Time-to-Digital Converter(TDC) to obtain the constant delay time and good reliability. The reliability property is described with delay elements. In TDC the time signal is converted to digital value which is based on delay elements for the time interpolation. To obtain the constant delay time, the first and the last delay elements have different structure compared to the middle delay elements. In the first and the last delay elements, the driving ability could be controlled for the different delay time. The delay element can be designed by analog and digital devices. The delay time of the element using analog devices is not sensitive to process parameters than that of the element using digital devices. And the TDC circuit by the elements using analog devices shows better reliability than that by the elements using digital devices also.