• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전력기술부문
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• pp.323-326
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• 2001

This paper describes the algorithm which can not only take account of voltage suability but also consider small signal stability. As for voltage stability both CPF and PoC methods are utilized to pinpoint the exact voltage collapse point. Then, using the converged load flow results full system matrix is configured and its eigenvalues are computed. The suggested algorithm is applied to the Two-area system, and verified its usefulness. In addition this paper also deals with the results of analyzing the two-area system in terms of voltage stability and small signal stability.

• 한국농공학회지
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• 제40권2호
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• pp.92-101
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• 1998

Location patterns of protected horticulture were analyzed using a multiple correspondence analysis(MCA). The analysis could be used in evaluating location suitability of protected horticulture. The location factors of the protected horticulture for MCA include land category, size of protected horticulture, land slope, topography, effictive soil depth, irrigation and drainage condition, distance from roads, and so forth. The results showed that there were three different location patterns of protected horticulture. The first pattern was characterized by their nearness to villages. The facilities of this pattern were mainly located near to residential area. The second pattern was of those found in plain area. The facilities of this pattern were large in scale and located in paddy field far from residential area. The facilities of the last pattern were small in scale and located on nonpaddy fields. They were mostly found in hilly or mountainous area.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.668-671
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• 2009

This study seeks to develop a map of the domestic small hydropower(SHP) resources to further improve SHP resources, developed through package tool which can accurately evaluate a wide range of SHP basin in a short period of time. GIS-based package tool for SHP resources analysis was calculated using 840 standard basin classified by drainage area and facility capacity, etc., and to assume a 40% annual load factor, expected annual electricity production was calculated. SHP resources potential for the development of SHP will be utilized as basic data.

• 소성∙가공
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• 제23권3호
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• pp.159-163
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• 2014

In the current study, the effect of small surface defects in the starting material including roughness, indentations, or scratches, which are perpendicular to the direction of drawing, on the product quality is investigated using the finite element method. An axisymmetric defect is assumed. Such defects are defined by a cylindrical defect area and two tapered regions connecting the defect area to the non-defective area of the material. Various conditions for these initial surface defects are considered, including defect depth, defect slope and defect length. To describe the plastic deformation of the defect in detail during the simulation, local remeshing is applied. Based on the finite element results, defect disappearance maps were generated. It was found that defect disappearance is significantly dependent on the defect depth and the defect length coupled with the defect slope.

• 한국농촌건축학회논문집
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• 제12권2호
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• pp.31-38
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• 2010

This study aims to present the basic criterions about the planning of local residential area in the middle or small city with an analysis of several samples in Paris, where is currently realizing many various housing projects and residential area development, especially theirs development methods, form and composition of theses samples and residential areas. At this object, this study was preceded with 3 main contents. Firstly, it has examined the development method, procedure and development samples, which is the precedence step for the organization of dwelling zone. Secondly, after presenting the criterions analysis of residential area's samples as drew the concept related with the presented residential area planning in corresponded cases, it has analyzed about the practical planning factors applied at each samples. Lastly, regarding precedent studies, it has examined the relation between planning factors and theory factors. The residential development in Paris, which was examined by this study, has been achieved through reasonable procedure from the superior concepts to detail planning and concept design for the project and the analysis result like this is expected to use as the basic criterions for the development and planning orientation of local residential area in Korea.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제9권1호
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• pp.35-41
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• 2003

The evaluation of economy of wards is based on the building area. The parameters are nursing area per bed, occupied area per patient, and the portion of movement area. Three areas such as patient area, nurse area, and corridor area are devided. The results of analysis are as follows. At first, allocation of patient area has the highest priority. Even though nurse area is small, the patient area is relatively large. Secondly, the patient area is mostly determined by the type of rooms, such as single, double, etc.. Finally, the type of alley on the floor is important to economy. The single corridor type is the most economical followed by the double corridor type. the single loaded type shows the worst economy.

• 한국생산제조학회지
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• 제23권2호
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• pp.173-177
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• 2014

In this study, a 20,000Hz ultrasonic horn was designed and fabricated using a finite element analysis. The horn's resonate frequency was 19,991Hz, and the harmonic response frequency was 20,000Hz. In order to observe the developed horn's performance, 4,000 pieces of displacement data were obtained using an optical sensor and were analyzed using a fast Fourier transform. Finally, the developed horn's resonate frequency was found to be 19,992Hz. The effect of the tip area of the developed horn on the weldability of a Cu sheet was experimentally investigated. It was found that the welding strengths of specimens welded using a small tip area were generally higherthan those of specimens welded using a large tip area.

• 한국군사과학기술학회지
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• 제20권5호
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• pp.633-638
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• 2017

The small unmanned robot developed in this paper can perform tasks such as surveillance and reconnaissance in the battle field. The noise generated during the operation of the robot may expose the operation area. Therefore, in this study, we developed a method to quantitatively measure the noise of the developed small unmanned ground robot. The criteria for noise measurement in indoor and outdoor are presented. It was used for statistical verification method to verify the reliability of the developed noise measurement method. The noise was measured at different places, and the correlation was analyzed. Thus, we proposed a method to predict the noise level in the operation area where the robot is operated by the noise test data measured during the development process.

• 벤처창업연구
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• 제2권1호
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• pp.133-151
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• 2007

지난 20세기 우리나라는 단시간 내에 산업화를 이룩하여 세계 12위의 주요 경제국으로 올라섰으나, 압축 성장은 사회의 모든 부문에 심각한 불균형을 초래했으며, 특히 수도권과 경부선축 중심의 발전전략은 지역경제 간의 불균형발전, 수도권 과밀화로 인한 각종 사회 경제적 문제를 노정시키고 있다. 국민의 정부 이후 행정수도 이전, 공공기관 및 연구기관의 지방이전 정책 등을 추진하고, 지역특화산업의 도출을 통한 중소기업의 육성 및 장려, 지역 균형발전을 도모하고자 하나, 중앙정부와 지방자치단체, 각종 이해집단의 이견으로 통합적이고 조화로운 지역균형발전에 대한 해법을 제시하지 못하고 있는 실정이다. 이에 본 연구는 정부의 지역 간, 산업체간 균형발전이라는 국정목표를 수행함에 있어 우리나라 지역산업 발전의 근간을 이루고 있는 중소기업의 자생적, 창의적 발전을 위한 지역균형발전 모형을 제시함으로써, 조화롭고 통합된 국가산업정책을 도모하고, 나아가 동북아 중심국가 실현의 기초를 제공하고자 한다. 그간 우리나라의 지역 중소기업정책은 수도권에 대한 입지규제와 지방에서의 하드 인프라스트럭처 구축을 중심으로 중앙정부의 하향식 정책 집행에 의해 추진되어 왔다. 정책의 유기적 연계성이 결여된 상태에서 부처별로 예산집행이 이루어짐으로써, 지역의 입지여건에 적합한 산업군집의 형성을 통한 지역경쟁력의 강화가 효율적으로 이루어지지 못한 것이 주지의 사실로, 본 연구는 지식기반경제 하에서의 지역 중소기업정책의 의미와 지역균형발전 모형의 구축 방안, 그리고 이에 근거한 지역의 중소기업발전 방안을 제시하였다.

• 지구물리와물리탐사
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• 제6권4호
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• pp.207-214
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• 2003

논 토양의 심도별 물리적 특성 분석을 목적으로 토양시료의 분석에 의한 전기비저항과 소형루프 전자탐사 자료의 1차원 역산에 의한 전기비저항 자료를 비교하였다. 비록 두 결과가 정확히 일치하지는 않았지만, 토양시료분석에서 나타난 저비저항대는 소형루프 전자탐사 결과에서도 저비저항 이상대로 나타났다. 따라서 소형루프 전자탐사법은 염류집적과 같은 토양 특성 파악에 사용 가능할 것으로 생각된다. 향후, 불포화대 토양특성과 전자탐사에 관한 연구가 지속된다면, 소형루프 전자탐사법은 농업용 토지의 염류 분포 파악에 매우 효과적일 것으로 기대된다.