• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제13권2호
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• pp.19-26
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• 2007

As a result of rapid aging speed in our society, it is necessary to supply a lot of housing for older people in near future. When we think that high portion of residence in rental housing complex composed of small units is the elderly, the housing units in those apartments have to be designed for the physical, mental, social, and economical conditions of elderly people who lives in such a residential complex. Considering these living conditions of the elderly, this study proposes a remodeling prototype of a living unit for older people in rental housing complex. For the research of this topic, various characteristics of the elderly and the environmental requirements for them firstly have been analysed from the literature survey and the interviews with two residents living in a rental apartment. And the design considerations for each space of the housing unit such as entrance, living room, bed room, bath room, and so forth have been explored. Based on the design guidelines above, the remodeling plan of a housing unit for older people has been propose as a result of this study.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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• pp.198-200
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• 2017

보조동력장치(Auxiliary Power Unit: APU)는 항공기에 장착되어 주엔진의 지상 및 공중 시동을 위한 에너지를 공급하고 항공기의 비상 및 보조 전원을 공급하는 역할을 하는 소형 가스터빈엔진이다. 항공기용 APU는 구조가 간단하고 소형이지만 유인 항공기에 장착되기 때문에 높은 신뢰성이 요구되므로 인증 절차를 통하여 그 신뢰성을 입증하여야 한다. 한국항공우주연구원은 2007년부터 2012년까지 한화 테크윈과 함께 축적된 국내 연구개발 역량 및 경험을 바탕으로 헬리콥터용 APU의 설계/해석, 제작 및 조립, 개발시험 및 인증시험을 평가를 성공적으로 완료하였다. 본 논문에서는 헬리콥터용 보조동력장치의 개발 및 인증 과정에 대하여 정리하였다.

• 산업경영시스템학회지
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• 제13권22호
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• pp.99-111
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• 1990

The first national QC Circle Convention sponsored by Industry Advancement Administration in 1975 was the beginning of employees group activity from a national point view. Subsequently some events such as the first nationwide Factory Seamaul activity small Group Convention, which was supervised by the ministry of Trading and Industry and Factory Seamanulundong promotion Center, paved the way for proliferation of the group activity through all kinds of manufacturing. Although since November 1982 these two conventions has been united, many problem have been disclosed that are against the basic principle more or less. Worker's small group activity is, essentially, a trouble shooting oriented voluntary small group within their working place to improve the surroundings creatively. In practice, however, many groups are so typical and so impetuous of the material effect that it is worried to be inclined to outform rather than contents. Effective small group activities are presumed to he successful only with labor management cooperation on the basis of human-oriented management philosophy. The small group activities are also prevalent in service sector. More derivative methods have been developed and more members are willingly participating in training programs. The small group which is basically a horizontal organization unit, promotes communication within the whole organization. In consideration of the social circumstances and traditions, the flexible model of the small group activities suitable to the corporate environment, will contribute to industrial development.

• 전기전자학회논문지
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• 제22권3호
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• pp.858-861
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• 2018

본 논문에서는 소형 $360^{\circ}$ 구강 스캐너 렌즈 모듈의 개발을 제안한다. 제안하는 소형 $360^{\circ}$ 구강 스캐너 렌즈 모듈은 소형 $360^{\circ}$ 고해상도(4MegaPixel) 렌즈 광학계, 15mm 이미지 센서부, 소형 $360^{\circ}$ 구강 스캐너 렌즈 외형 등으로 구성된다. 소형 $360^{\circ}$ 고해상도 렌즈 광학계는 총 9매의 렌즈로 어린이부터 성년까지 전 연령에 걸쳐 사용이 가능하도록 렌즈 외경을 15mm 이하로 제작한다. 소형 $360^{\circ}$ 고해상도 렌즈 광학계에 의해 입사되는 빛을 $90^{\circ}$ 굴곡을 시켜 이미지 센서에 영상 이미지를 전달하게 한다. 15mm 이미지 센서부는 이미지 센서의 열, 행 주소를 통해 이미지 배열을 거친 후 전압으로 변환된 값을 임베디드 보드의 ISP(Image Signal Processor)에 전송한다. 소형 $360^{\circ}$ 구강 스캐너 렌즈 외형은 개발된 렌즈의 고정을 위하여 경통을 설계하였다. 제안된 소형 $360^{\circ}$ 구강 스캐너 렌즈 모듈의 성능을 평가하기 위하여 공인시험기관에서 실험한 결과, $360^{\circ}$ 렌즈 광학계 분해능은 150cycles/mm에서 30% 이상, $360^{\circ}$ 렌즈 화각은 수평은 $360^{\circ}$, 수직은 $42^{\circ}{\sim}85^{\circ}$, 렌즈 왜곡률은 5% 이하의 세계최고 수준과 동일한 결과를 산출하였다.

• 한국주거학회논문집
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• 제13권6호
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• pp.79-88
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• 2002

The intent of this study is to investigate the feasibility of small-scale developments in residential blocks in the city, and to propose development strategies and models. This research is done on the premises that large housing developments ignore the urban structure of its own quality, whitens on-lot-based multi-unit housing developments fail to maintain amenity and livability in residential blocks. For solving these shortcomings, this research proposes the possibility of small-scale housing development models as an alternative development system. And some residential blocks were selected as case sites and analyzed into typical block types, to support the proposal of pertinent development types. Each type was investigated and discussed in terms of development feasibility and proper development strategies. Finally, three development schemes are proposed as prototypical models for the best application in residential blocks.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 A
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• pp.342-344
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• 2004

In conventional small signal stability analysis, system is assumed to be invariant and the state space equations are used to calculate the eigenvalues of state matrix. However, when a system contains switching elements such as FACTS devices, it becomes non-continuous system. In this case, a mathematically rigorous approach to system small signal stability analysis is by means of eigenvalue analysis of the system periodic transition matrix based on discrete system analysis method. In this research, RCF(Resistive Companion Form) method is used to analyse small signal stability of a non-continuous system including switching elements'. Applying the RCF method to the differential and integral equations of power system, generator, controllers and FACTS devices including switching elements should be modeled in the form of state transition matrix. From this state transition matrix eigenvalues which are mapped to unit circle can be calculated.

• Journal of the Korean Data and Information Science Society
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• 제27권1호
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• pp.245-254
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• 2016

Many surveys provide categorical data and there may be one or more missing categories. We describe a nonignorable nonresponse model for the analysis of two-way contingency tables from small areas. There are both item and unit nonresponse. One approach to analyze these data is to construct several tables corresponding to missing categories. We describe a hierarchical Bayesian model to analyze two-way categorical data from different areas. This allows a "borrowing of strength" of the data from larger areas to improve the reliability in the estimates of the model parameters corresponding to the small areas. Also we use a nonignorable nonresponse model with Bayesian uncertainty analysis by placing priors in nonidentifiable parameters instead of a sensitivity analysis for nonidentifiable parameters. We use the griddy Gibbs sampler to fit our models and compute DIC and BPP for model diagnostics. We illustrate our method using data from NHANES III data on thirteen states to obtain the finite population proportions.

• 항공우주시스템공학회지
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• 제6권2호
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• pp.28-34
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• 2012

Structural integrity evaluation is important item in the aircraft certification. Recently, it is designed for limit load, material weakness about fatigue and corrosion, damage by bird strike in flight to evaluate structural integrity of aircraft. And static/fatigue analysis are performed to secure structural integrity, it was verified by static and fatigue tests. To evaluate the structural integrity of small aircraft tail, structural integrity was calculated by the finite element analysis. In the present study, finite element analysis are performed to pick out load cases in flight occurrence, and secure margin of safety to evaluate structural integrity of KC-100 tail unit. The proprieties of finite element analysis results are compared with the static structure test results. The estimation process of structural integrity for small aircraft tail may help the design.

• 한국실내디자인학회논문집
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• 제21권5호
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• pp.77-84
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• 2012

Single formative language created by the standardization of industrial society carries a cell constructive aspect. Such space structural form made gigantic buildings, which has a symbolism as an independent object. Such space shows a morphological symbolism by public preference but it did not establish essential meaning of a shape or concentrated relation. In this regard, this paper tries to show organic similarity of structural formality of small commercial space (patterned space), which was made by the continuity of concentrated patterns not an object of dualistic unit features. Therefore, this study analyzed the cultural, commercial and public space based upon systematical concept and features. Systematical space formality that makes multilateral relation between human, environment and a thing is a concentrated view point by relational features not by the cluster displayed by hierarchical features. Systematical space of small patterned space emphasized its appropriateness of expansion and creating diversified spaces unlike gigantic symbolic buildings.

• 한국건설관리학회논문집
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• 제13권6호
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• pp.133-142
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• 2012

최근 저탄소 녹색성장 등 건설 환경의 변화에 따라 친환경적이고 시공 효율성을 극대화할 수 있는 유닛모듈러 공법 등과 같은 새로운 건축시스템에 대한 요구가 증대되고 있다. 유닛모듈러 공법은 전체 공정의 80%이상을 공장에서 제작하고 현장에서는 유닛모듈 조립과 마감작업 위주로 작업이 진행되므로 설계 및 공장 제작 등 현장시공 이전 단계의 품질이 건축물 전체의 품질을 좌우하는 특성을 가진다. 국내 유닛모듈러 공법은 2003년 학교 건축물의 적용을 시작으로 점차 확대되고 있지만, 적용 사례와 관련 자료의 부족, 모듈러 생산업체의 영세성 등으로 유닛모듈러 공법의 특성을 충분히 반영한 설계, 공장제작 및 현장시공은 아직 이루어지지 못하고 있는 실정이다. 본 연구는 국내 유닛모듈러 건축물의 설계품질 향상의 일환으로 공장제작 및 현장시공 단계에서의 문제점을 도출하고, 그 원인을 비교 분석함으로써 유닛모듈러 건축물의 설계 초기 단계에서 고려해야 할 주요 검토 항목을 제시하였다.