• 대한기계학회논문집B
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• 제31권2호
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• pp.125-131
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• 2007

This paper presents guideline for a practical design of the hybrid system combining a pressurized solid oxide fuel cell and a gas turbine. Design of the hybrid system based on a virtually designed gas turbine was simulated using models for off-design operation of the gas turbine. Two system configurations, with different method for supplying reforming steam, are considered and their design characteristics are compared. A higher design cell temperature provides better system performance. However, there exists a maximum allowable design cell temperature because the operating point of the compressor approaches the surge point with increasing fuel cell temperature. Increased pressure loss at the fuel cell moves the compressor operating point toward the surge point and reduces system performance.

• 한국실내디자인학회논문집
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• 제11호
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• pp.11-19
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• 1997

This stduy aimed to suggest a possible way for a new setting of interior design education through analyzing educational situations of domestic interior design societies. The study showed that interior design education should not follow expressive methods made from practical work which had been popular in the past and it should establish fundamental formation to make interior design education useful in industrial fields through active educationalindustrial complex. Interior design education is not possible without interrelationship with other professional fields and cooperative attitudes among them. The rapid development in the modern industrial world and the ever-growing information processing world regardless of ideology and regiional boundaries indicate that the future of interior design education will be no longer effective with traditional education systems. The idea suggested in this study may be understood as a bridge between the educational reality and its ideal in interior design teaching. The main points of the study are follows. First, the projects of advanced interior design should be focused on increasing the ability for problem solving rather than accumulating basic knowledge. Second, motivation is important for the maximization of the efficiency of educatiov. Therefore a few suggestions in establishing design conditions, as strategies of inducing 'attention', 'self-confidence', 'satisfaction', and 'relevance' are closely examined to propose practical application methods. Third, educational methods should be developed towards creativity in order to increase abilities of thinking and expressiov. Finally, it is necessary to explore various device which help internship participants to get experiences with a sense of practical situations in industrial fields. This could be possibly done by enforcing academic grades for the work done as an internship participation; by employing workmen in industrial fields as faculty members; and by bringing faculty members into actual industrial situations and providing workmen with lectures. A new approach for a better design education seems to be desirable for the future.

• 디자인학연구
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• 제16권3호
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• pp.281-290
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• 2003

실습은 이를 계획하고 실행하는 교육자와 실습의 대상인 학생간에 이루어지는 커뮤니케이션 과정이다. 실습과정에서의 커뮤니케이션 내용은 학생들에게 달성시키고자 하는 전공지식과 기술로서 교육자와 학생의 관계에서 전달과 수간의 절차가 관여한다. 이와 같이 실습과정의 커뮤니케이션이 교육자와 학생 그리고 실습의 내용을 통해서 이루어진다는 점에서 이들은 실습과정을 구성하는 의미의 대상이며 상호작용의 관계성을 형성하고 있다. 따라서 효과적인 실습과정을 계획하기 위해서는 실습과정을 구성하는 이들 의미대상의 관계에서 이루어지는 의미작용의 현상을 이해해야 하는 것이다. 본 연구는 이러한 문제인식을 가지고 실습의 과정에서 이들 의미대상이 형성하는 의미작용에 대한 현상적 분석에 접근하고자 하였다. 이러한 분석을 통해서 연구자는 실습과정에서 이들 의미대상이 가지고 있는 속성을 파악하고, 이들의 관계에서 발생하는 의미작용의 요인들을 해석함으로써 실습과정을 계획하는데 있어서 고려해야할 인식의 범주를 제시하였다.

• 설비공학논문집
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• 제27권4호
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• pp.187-194
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• 2015

This paper describes the PI controller design based on a practical transfer function model for centrifugal water chillers. The rotational speed of a compressor and the opening angle of an electronic expansion valve were simultaneously regulated as manipulated variables to maintain temperature reference and to ensure high efficiency of the chiller. The COP according to the change in each variable was investigated by performing some static experiments, and it was reflected in the PI controller design to accomplish the high efficiency control. Especially, the practical transfer function model of the chiller was built based on the dynamic experimental data considering the strong inherent non-linearity and complexity of the chiller system. The validity of the designed PI controller was proven by some experimental results using the test facility and the results were also compared to the conventional evaporating pressure control results.

• 한국조경학회지
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• 제34권1호
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• pp.81-91
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• 2006

It is widely accepted that one of the purposes of education in landscape architecture is to train students as experts for professional practice. But graduates rarely get positive evaluation from the professional practice in landscape architecture regarding their capability in real environments. Recently the international accreditation system for architectural education is introduced, and it requires a considerably high degree of education enhancing practical capability of students as practitioner. In this context, this study aims to seek an effective educational method for enhancing practical practice capability of students in landscape architectural design education by using the analysis method employed architectural educations in Korea in measuring student performance criteria. The results of the study suggest international education standard of environmental design course emphasizes the ingenuity of individuals. And integrating the knowledges of diverse fields into education system is necessity. Nowadays, handing over the hard skills emphasized in the past is changing toward fostering soft skills. As a conclusion, educational contents which satisfy the established objects are mostly composed of soft skills such as communication techniques, collectional capability of informations, personal relationships and vocational ethics etc.

• KIEAE Journal
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• 제8권5호
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• pp.35-41
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• 2008

The aim of this study is to find out directions for development of soundscape design for creating a unique sound culture in a region, and to search for the practical strategies toward a soundscape design movement in Korea. For these specific aims, several components in soundscape through considering from original conception and ideology of soundscape, such as the concept of soundscape, the meaning of soundscape design, the categories of soundscape researh : keynote sounds, sound signals, and soundmarks, and the primary problems and strategies in the world soundscape project(WSP) are investigated. The result shows that it is necessary to practice several ways in our housing life, that is, the recovery of our coenesthesia, development of the residential environments considering the soundscape, revitalization of community consciousness, rehabilitation of the sensibility, and identity excavation of sound culture, and it is very important to spread out a plan for integrating the following four categories of strategies : conceptual, educational, political, and social.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.982-987
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• 2004

Most design practices have not taken advantage of the advanced theories in the modern fracture mechanics and finite element analysis due to complexity of analysis as well as the large quantity of vaguely defined parameters in actual designs. This paper considers fatigue problems in bridge structures using effective analytical and design tools from the field of qualitative constraint reasoning. A set of software modules was developed for fatigue analysis ,and evaluation, which is easily applicable in engineering practices of bridge designers. The software modules integrate techniques in the field of knowledge representation and qualitative reasoning, into the conventional fatigue analysis. The techniques enable the use complex analysis formulations to tackle practical problems with uncertainties, and present the design outcome in two-dimensional design space. Appropriate engineering assumptions and judgments in carrying out these procedures, often the most difficult part for practicing engineers, can be partially produced by using qualitative reasoning to define the trends and ranges, interval constraint analysis to derive the controlling parameters, as well as design space to account for practical experience. This paper depicts a way of complex analysis to practical engineering designs with qualitative reasoning.

• 한국철도학회논문집
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• 제10권2호
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• pp.103-111
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• 2007

The existing design materials by document type are restricted in searching and acquiring necessary design information because the materials consist of huge information and various document types. This study suggests a methodology to develop an electronic technical manual that can manage construction design materials by XML-base integrated information system. Electronic technical manual for design materials can provide visualized information through various multimedia tools such as multi-link, virtual reality and animation. Using an integrated electronic manual for construction project can prevent to miss necessary design information. The results of this study includes a data flow diagram to develop an interactive electronic technical manual (IETM) for construction design information. Finally the study suggests some scenarios for practical use and quantitative analysis of application effect analysis by AHP method.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1995년도 가을 학술발표회 논문집
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• pp.17-24
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• 1995

This work proposes an optimality criteria applicable to the optimum design of plane frames. Stress constraints as well as displacement constraints are treated as behavioural constraints and thus the first order approximation of stress constraints is adopted. The design space of practical reinforced concrete frames with discrete design variables has been found to have many local minima, and thus it is desirable to find in advance the mathematical minimum, hopefully global, prior to starting to search a practical optimum design. By using the mathematical minimum as a trial design of any search algorithm, we may not full into a local minimum but apparently costly design. Therefore this work aims at establishing a mathematically rigorous method ⑴ by adopting first-order approximation of constraints, ⑵ by reducing the design space whenever minimum size restrictions become "active" and ⑶ by the of Newton-Raphson Method.

• International Journal of Naval Architecture and Ocean Engineering
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• 제1권1호
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• pp.50-56
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• 2009

The hydrodynamic effect of appendages for high-speed passenger vessels, such as Ro-Pax, Ro-Ro and cruiser vessels, is very severe and, therefore, it is essential to carry out the design of appendages for high-speed passenger vessels from the preliminary design stage to the final detail design stage through a full survey of the reference vessels together with sufficient technical investigation. Otherwise, many problems would be caused by mismatches between the appendages and the hull form. This paper investigates the design characteristics of some appendages, such as the side thruster, the shaft-strut, and the stern wedge, based on the design experience accumulated at Samsung, on CFD, and on model test results for high-speed passenger vessels. Further to this investigation, some practical and valuable design guidelines for such appendages are suggested.