• 한국의류산업학회지
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• 제6권2호
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• pp.221-228
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• 2004

The purpose of this study was to compare somatotypes from various classification methods, to analyze the interrelation among each somatotype or each high frequency type, and to suggest the basis to interpret body size and shape more accurately. As a sample, the subjects were 97 Korean females between 18 and 24 years old. They were measured both anthropometric and photographic measuring in November, 1999. Their somatotypes were classified by three kinds of classification methods. The first method was based on the lateral view of body, the second involved Factor and Cluster analysis with the photographic measurements of anterior and lateral body, and the third involved Factor and Cluster analysis with the anthropometric measurements of whole body. The upper body was classified into three types, and the lower body was classified into 6 types from the lateral view of body. The bend-forward/q-2 was found to be the 'High-frequency type from the lateral view of body', and the Straight/n-1 was found to be the 'Straight type from the lateral view of body'. From the classification by the analysis of photographic measurements, the anterior body was classified into three types, the lateral was classified into 4 types. The X/${\varepsilon}$ type was found to be the 'High-frequency type from the analysis of photographic measurements of anterior and lateral body'. From the classification by the analysis of anthropometric measurements, the whole body was classified into three types. The i type was found to be the 'High-frequency type from the analysis of anthropometric measurements of whole body'. The significant interrelation was certified among some somatotypes or some High-frequency types. We found that both the view of body and the statistical analysis would make the clear definition of each somatotype possible. In order to certify the representativeness of High-frequency type, further analysis would be required of subjects who were in the High-frequency type and their body parts were in the High-frequency range.

• Journal of Information Technology Applications and Management
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• 제13권3호
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• pp.75-87
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• 2006

In this paper. we consider the multi-view video technology. The technology, which is a field of 3-Dimensional video processing, enables the user to watch the various view-point of video. We expect that the technology will be applicable to a lot of video services. The economic effects of new technology are very important concern for the technology developer and the technology development policy makers. We, therefore. propose a general method for the economic repercussion effects of the multi-view video technology. The method is based on the expert opinion and input-output analysis. The results for the multi-view video technology are included.

• Journal of the Optical Society of Korea
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• 제18권6호
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• pp.720-731
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• 2014

There are many kinds of optical systems to widen a field of view. Fisheye lenses with view angles of 180 degrees and omni-directional systems with the view angles of 360 degrees are recognized as proper systems to widen a field of view. In this study, we proposed a new optical system to overcome drawbacks of conventional omni-directional systems such as a limited field of view in the central area and difficulties in manufacturing. Thus we can eliminate the undesirable reflection components of the omni-directional system and solve the primary drawback of the conventional system. Finally, tolerance analysis using Zernike polynomial coefficients was performed to confirm the productivity of the new optical system. Furthermore, we established a method of optical axis alignment and compensation schemes for the proposed optical system as a result of tolerance analysis. In a sensitivity calculation, we investigated performance degradation due to manufacturing error using Code V(R) macro function. Consequently, we suggested compensation schemes using a lens group decentering. This paper gives a good guidance for the optical design and tolerance analysis including the compensation method in the extremely wide angle system.

• 한국자동차공학회논문집
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• 제3권6호
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• pp.1-7
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• 1995

Vehicle has two kinds of mirrors to check the rear. Especially inner rear-view mirror(room mirror) is easy to vibrate. A vibration of vehicle inner rear-view mirror affects safe driving. This study presents both of analysis of cause of mirror vibration and resolution in order to improve that throughout analysis by elasticity theory, FEM, and test.

• 한국주거학회논문집
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• 제17권3호
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• pp.99-109
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• 2006

The purpose of this study was to analyze the characteristic of each view in an apartment unit in terms of the quality. This study was accomplished by two research methods; the field survey on 181 apartment complexes in Daegu, and the preference evaluation on 24 cases sampled in the sense of its location, i.e. inside or outside of a complex. In the field survey, view targets were categorized into various items such as a building, a road, a mountain, a tree, another apartment, the sky, and so on, and the characteristics of the distance from a viewer to view targets and view of the level in an apartment were analyzed. In the preference evaluation, 24 cases, each one has one of the follows; the natural view, the artificial view, and the combined view of the both, were chosen and those were evaluated by 167 interviewees. As a result, the conclusions from the study were drawn as follows; 1) The view, the combination of buildings, roads, mountains, trees, apartments, and the sky, is usually seen in an apartment unit. 2) The type of view target is more significant to a person than its location. 3) The natural and combined view are preferred to the artificial one. 4) In the case of the same outside view, a person likes the open view more than the somewhat covered one.

• 한국콘텐츠학회논문지
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• 제13권9호
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• pp.429-439
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• 2013

본 연구에서는 명승 경관자원을 위한 조망점 선정에 관한 연구로 해남 달마산 미황사 일원(명승 제59호)를 대상으로 조망점 선정기준을 마련하고 GIS를 이용하여 3D 가시권분석을 실시한 후 선호도분석을 실시하였다. 이는 명승과 같은 자연 문화자원에 대한 효율적인 조망경관의 보호를 위한 기초연구로 분석한 결과는 다음과 같다. 명승 주변에서 조망점 선정기준에 따라 선정된 지점에서 3D 가시권 분석결과의 36개 데이터에 대한 선호도 분석과 장소성 분석을 실시한 결과 선호도와 장소성의 전체적인 평균점수가 중간값 보다 높게 나타나 조망점 선정기준이 적합하였음을 확인하였다. 또한 경관에 대한 선호도가 높은 지점이 장소성에 대한 인식 또한 높은 것으로 나타났다. 본 연구에서 사용한 3D 가시권 분석은 명승의 경관자원 발굴과 조망경관의 보존 등을 위한 기초연구로 추후 선호도, 장소성에 관한 결과와 함께 가시거리, 조망면적 등의 관계를 추가적으로 분석함으로써 경관자원의 발굴 및 관리에 있어 객관적이고 실증적인 조망지점 선정 등의 연구가 수행되어져야 할 것이다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 춘계학술대회 논문집
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• pp.307-308
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• 2010

• 산업공학
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• 제16권2호
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• pp.229-239
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• 2003

The On-Line Analytical Processing (OLAP) tools access data from the data warehouse for complex data analysis, such as multidimensional data analysis, and decision support activities. Current research has lead to new developments in all aspects of data warehousing, however, there are still a number of problems that need to be solved for making data warehousing effective. View maintenance, one of them, is to maintain view in response to updates in source data. Keeping the view consistent with updates to the base relations, however, can be expensive, since it may involve querying external sources where the base relations reside. In order to reduce maintenance costs, it is possible to maintain the views using information that is strictly local to the data warehouse. This process is usually referred to as "self-maintenance of views". A number of algorithm have been proposed for self maintenance of views where they keep some additional information in data warehouse in the form of auxiliary views. But those algorithms did not consider a consistency of materialized views using view self-maintenance. The purpose of this paper is to research consistency problem when self-maintenance of views is implemented. The proposed "conveyor algorithm" will resolved a complete consistency of materialized view using self-maintenance with considering network delay. The rationale for conveyor algorithm and performance characteristics are described in detail.

• 한국항공우주학회지
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• 제43권12호
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• pp.1079-1088
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• 2015

본 연구는 한국항공우주연구원에서 개발한 위성종합설계 SW 내의 복사계수 계산 프로그램의 병렬화 및 성능향상에 대해 논의한다. 복사계수는 복사열전달이 포함된 인공위성의 열해석을 수행하기 위한 필수적인 전초 단계로서 그 자체적인 계산량 또한 상당하다. 특히 위성 궤도상 시간에 따라 태양전지판과 본체의 상대변위가 변하기에 시간 별 독립적인 복사계수의 계산이 필요하다. 본 논문은 복사형상계수 병렬화 방법과 그 성능, KD-Tree 기반 차폐 탐색 알고리즘 및 태양전지판과 본체의 상대변위 변화에 따른 부분 복사형상계수 행렬 갱신이라고 지칭하는 계산량 저감 기법에 대해 논한다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2004년도 추계학술대회 논문집
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• pp.221-226
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• 2004

View targets have been studied extensively in terms of an aesthetic value and a monetary asset. But there was actually deficient in the research about a variety of view targets. Therefore, the purpose of this paper was to classify systematically into diverse view targets in an apartment unit by the use of both the literature methods and the questionnaire-interview survey. In result, the view targets in an apartment unit were categorized by two large groups which are a natural-type and an artificial-type view. The former was subdivided into a pure natural-type and a man-made natural-type view, while the latter was subdivided into a building-type, a street-furniture-type, a road-type, a open-space-type, and a tower-type view. Consequently, this study might be applied to the understanding of the quality of residential environment as a basis.