• Journal of Mechanical Science and Technology
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• 제20권10호
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• pp.1653-1661
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• 2006

AC induction motors have been widely used for fan motor of the air conditioner indoor unit. Noise of these AC induction motors is usually caused by the coupling effects of structural and electrical systems. The rotating torque and the noise from AC induction motor were discussed in this paper,. First, the modification of motor was carried out in order to reduce the unbalance magneto motive force between main and sub winding. Second, structural modification based on normal mode analysis and modal testing was carried out so that the fan motor does not have the natural frequencies near the 2f-line frequency. Numerical modifications through these two processes were verified by experiments, which showed that the sound pressure level at 2f-line frequency of the modified system became about 25dB less than that of conventional one.

• 치위생과학회지
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• 제16권6호
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• pp.424-431
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• 2016

본 연구는 구강체조와 구강근육마사지를 접목한 구강근육운동을 매뉴얼화하여 운영 형태에 따른 프로그램의 비교를 통해 효과적인 프로그램 운영방식을 제안하기 위한 것으로 자가 실천 프로그램을 적용한 한울노인대학 노인 14명과 전문가 개입 프로그램을 적용한 강릉종합사회복지관 이용 노인 28명을 대상으로 실시한 결과 다음과 같은 결론을 얻었다. 전문가 개입 집단에서 프로그램 운영 후 타액분비율이 증가하고, 주관적 구강건조증의 완화되었으나, 자가 실천 집단은 주관적 구강건조증에서 긍정적인 변화를 확인할 수 있었다. 두 집단에 대하여 프로그램 만족도를 비교한 결과, 자가 실천 집단이 전문가 개입 집단보다 프로그램 내용, 방법, 자신의 구강 건강관리 도움, 계속 참여 의향, 타인에게 권유의향이 통계적 유의성을 확인할 수 없었으나, 대체적으로 높게 평가되었다. 연구기간 중 대상자 모집의 한계로 표본수가 적고, 개입기간이 짧았던 한계가 있으나 본연구를 통해 구강체조와 구강근육마사지의 복합적 적용인 구강근육운동 프로그램의 효과를 확인할 수 있었고, 특히 노인의 자발적 구강건강 행동 유지의 어려움이 있으므로 일정 정도의 전문가 개입이 필요함을 확인할 수 있었다. 또한 노인의 특성에 따라서 자가실천 구강근육운동 프로그램과 전문가 개입 프로그램 적용이 효과적일 수 있음을 시사하는 데 의의가 있다. 노인의 구강건강유지와 구강건강관련 삶의 질을 높이기 위해 구강건강증진사업을 전개할 때 효과적인 구강체조뿐 아니라 구강근육마사지가 접목된 구강운동 프로그램의 보급이 필요할 것으로 생각된다.

• 대한산업공학회지
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• 제17권2호
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• pp.17-26
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• 1991

This paper discusses an expert system to generate part codes and construct part families, ESPCC, for the group technology application. The ESPCC, that is developed by using VP-Expert rule-based expert system development tool, embodies the specific knowledge of human experts to determine part codes consistent with the OPITZ classification and coding system. The ESPCC is implemented on an IBM compatible personal computers running MS-DOS.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 B
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• pp.637-639
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• 1995

Since power systems tend to be more large and complex, expert system substituted for the decision-making achieved by the power system operation expert is required. So far, expert system has been used for fault diagonosis and voltage-reactive power control and so on. In the expert system developed using 'C' language, the faulted element is estimated using the AND operation of lists which are acquired from the information on operated relays. It is also considered to identify the misoperation of protective devices using CF(Certainty Factor), and operation failure of those using the data base of parameter group list. The developed expert system is applied to a 6-bus sample system and through the case studies. It is shown that the expert system is very useful.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 춘계 학술발표회
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• pp.743-749
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• 2009

In this study, the field test for suction drain method which does not require a surcharge load and a sealing sheet was performed at west seashore's site constructed by the dredged and reclaimed clay. The improvements of soft ground by suction drain method was analyzed by the results of real-time field measurement, SPT(Standard Penetration Test) and laboratory tests. The results indicated that the soft ground improvement is effective the vertical drain method used with vacuum pressure rather than surcharge load with considering settlements, dissipation of pore water pressure and shear strength.

• 한국생활과학회지
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• 제16권1호
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• pp.137-143
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• 2007

The purpose of this study is to prove the work efficiency of PDS by measuring the work time on the process of pattern making of woman's tailored jacket. Also compared to the manual work time, PDS work efficiency is estimated according to experience difference. The YUKA CAD system was used. Through analysis of PDS Process, work time was measured by stop watch. Also the appearance of the 2 jackets was evaluated by a pool of evaluators consisted of graduate students and experienced professional modelist. The results were as follows: The work efficiency of PDS is higher than the work efficiency of manual work. There were significant differences of work time between work types in the expert and inexpert group. A study compared the work efficiency by PDS work type with those by manual work type according to experience difference and found that the work efficiency by PDS in the expert group was 25.3%, in the inexpert group was 35%. There were significant differences of work time between experience groups in PDS work, the work efficiency of expert group to inexpert group in the total pattern making time by PDS was 36.7%. There were no significant differences of appearance of tailored jacket between work types.

• Journal of Ship and Ocean Technology
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• 제3권2호
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• pp.27-48
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• 1999

The paper is concerned with application to develop the expert system, which structural analysis and design process for tower cranes. The system is organized into three groups. One is pre-processor for creating input data files, another is `model former' which combines knowledge-base with inference engine for automatic generating structural analysis models, a third is application group for final analysis checks. In this study, geometric subroutine of `model former' designates node positions, nodes, elements numbers and element types. Load data subroutine computes weight of tower crane and device, slewing force, cargo load, wind force form rules or equations in knowledge-base. Also, Property and boundary subroutine applies element properties and boundary conditions to suitable elements and nodes. Design and analysis expert system for tower crane integrates these subroutine, `model former' and pre-processor. RBR(Rule-Base Reasoning) was adopted for a reasoning strategy of this expert system. And this expert system can produce structural analysis model and data, which can be used in ordinary structural analysis program (SAP, ADINA or NASTRAN, etc.). In this paper, this expert system produces format of the analysis model data, which are used in MSC/NASTRAN. The main discussions included in the paper are introduction of the tower crane and structural analysis, composition of the design expert system for tower crane and structural analysis using the expert system.

• 한국지능시스템학회논문지
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• 제23권1호
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• pp.7-11
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• 2013

전문가의 지식을 기반으로 한 추천시스템에 대한 다양한 연구가 최근 활발히 진행되고 있다. 지금까지의 전문가 기반 추천 시스템이 공통된 전문가 그룹의 지식을 바탕으로 모두에게 아이템을 추천하였다면, 본 논문에서는 개인의 필요와 전문가에 대한 관점을 반영한 개인화된 전문가 그룹의 지식을 기반으로 한 추천 시스템을 제안한다. 개인화된 전문가 그룹을 찾는 과정이 제안하는 추천 시스템에서 가장 중요한 부분이다. 이를 위해 개인화된 전문가를 효율적으로 찾아내는 지지 벡터 머신(SVM) 기반 기법을 제안한다. 추천 시스템에서 널리 사용되는 k 근접이웃 알고리즘과의 비교를 통하여서 개인화된 전문가를 기반으로 한 협업 필터링 추천 시스템의 효용성을 입증한다.

• 복식문화연구
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• 제5권3호
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• pp.47-56
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• 1997

The purpose of this study was to investigate relationship between self-concept and clothing conformity. The subject of this study were 154 purposively select student at woman\`s university in Seoul city. For statistical analysis, mean, standard deviation, x²-test , pearson\`s correlation, ANOVA. Duncan Multiple Range test were used. The result form experiment were as follow. 1. The group which has the higher level of self-concept showed significant the lower degree of conformity than the group which has the lower level of self-concept. 2. A student at a woman\`s university showed significant higher degree of conformity to the group of fashion expert than the group of peer.

• 한국안전학회지
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• 제29권5호
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• pp.166-171
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• 2014

This study is conducted to compare three methods of hazard analyses and to propose the control for the accidents arising under construction of heat accumulator of group energy projects(co-generation plants). The analysis of fatal accidents and the Analytic Hierarchical Process(AHP) using by the questionnaire survey for the workers engaged in the construction of heat accumulator and the quantitative questionnaire survey of expert group has been carried out. In order to analyze the fatal accidents, the 115 cases of accidents from 2001 to 2012 published by Korean Occupational Safety and Health Agency(KOSHA) and workers suffered from industrial accidents are collected and analyzed. The AHP is applied and analyzed for 66 persons of the construction site managers, safety engineers and construction engineers and the questionnaire survey of expert group is carried out and analyzed for the 51 persons of contractors and construction inspectors. The analyses of the types of accidents and the jobs of the suffered workers and the hazardous construction processes which are occurred accidents frequently are shown. The results of the analysis of fatal accidents and the AHP as well as the questionnaire of expert group are shown similar results.