• 한국멀티미디어학회논문지
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• 제20권12호
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• pp.2009-2015
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• 2017

A two-dimensional lens is required to reproduce both the horizontal and vertical parallax through an autostereoscopic 3D display. Among the two-dimensional lenses, a hexagonal micro lens array (MLA) having good optical efficiency is mainly used. However, the hexagonal MLA has complex geometric features. The first feature is that the lens cells are zigzagged in the vertical direction, which should be reflected in the view number calculation for each sub-pixel. The second feature is that the four sides of a hexagonal lens cell are tilted, requiring a more careful view index assignment to the lens cell. In this paper, we propose a sub-pixel multiplexing scheme suitable for the features of the hexagonal MLA. We also propose a view-overlay algorithm based on a two-dimensional lens and compare subjective image quality with existing view-selection through autostereoscopic 3D display implementation.

• 동아시아경상학회지
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• 제10권2호
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• pp.55-69
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• 2022

Purpose - This study is a study to investigate the problem of the selection of means of transportation in international logistics by studying the basics of logistics activities, selection factors of transportation methods, and multimodal transportation. Research design, data, methodology - This study is composed of 5 chapters through literature study. Chapter 1 describes the functions and transportation system of international logistics, Chapter 2 selects transportation, Chapter 3 deals with maritime transportation and multimodal transportation, Chapter 4 describes multimodal transportation in terms of customer service, Chapter 5 addresses the implications and conclusions. Results - When looking at the problem of selecting a means of transportation, it is important that the parties involved in the transportation choose which means of transportation for their convenience and profit during the transportation process. Here, there will be factors to consider, including transportation cost, when selecting a means of transportation, and each means of transportation may have characteristics or advantages and disadvantages. Considering all these points, the adoption of multimodal transportation from a customer service point of view may be the answer. Conclusions - This study pays attention to the academic understanding related to the selection of means of transportation and to how usefully this thesis can be used in the selection of transportation related persons, especially shippers, from a practical level.

• KDI Journal of Economic Policy
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• 제36권4호
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• pp.33-69
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• 2014

본 논문은 펀드투자의 유입자금흐름과 유출자금흐름을 별도로 구분하여 결정요인을 실증분석하였다. 과거 성과, 펀드연령, 펀드규모, 판매보수 등 주요 요인의 자금흐름에 대한 효과는 유입자금과 유출자금 사이에 큰 차이가 있었다. 과거 성과와의 양(+)의 관계, 펀드연령과의 음(-)의 관계 등 순유입자금을 기반으로 한 기존 연구에서 확립된 실증 결과는 유출자금에 대해서는 반대로 나타났다. 특히 과거 성과의 유출자금과의 관계는 '처분효과(disposition effect)'의 존재를 시사하였다. 한편, '계열 펀드'와 '비계열 펀드'를 구분할 경우 판매보수의 유입자금과 유출자금에 대한 효과가 두 펀드그룹 사이에 상이하여, 판매사 간의 유인체계 차이가 펀드선택시장에서 중요한 요인인 것으로 나타났다. '처분효과'의 존재 등 본 논문에서 미국의 기존 연구와 다른 분석 결과가 얻어진 이유는 표본의 차이에 기인하였을 가능성이 있다.

• 한국주거학회논문집
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• 제19권3호
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• pp.31-38
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• 2008

Recently, Seoul residential real estate market showed a big change, especially in 2007. The residential property price in Seoul had been mainly affected by 5 provideces: Kangnam-gu, Seocho-gu, Songpa-gu, Gangdong-gu and Yangchun-gu, but these providences started to show the decrease in price while the other providences ironically showed the opposite direction. Therefore, this project was derived from this phenomenon recognition and the necessity as the new market trend requires. The pre-research was carried out with the point of social-population academic view, but this project provides the analysis on the new market trend by simplifying the complex valuation indexes, originated from the pre-research. In result, the aspects of the change could be categorized into time-manner classification and territorial-manner classification, in cope with the change in the satisfaction degree on the residential environment and the selection tendency of the residential property. Based on the the moving-preferred area criteria, the territorial classification was categorized into 3 areas: 5 providences, which showed the initial decrease in real estate price (area 1), the other Kangnam area (area 2), and Kangbuk area (area 3). The result illustrated the reasonable change in the satisfaction degree on the residential environment and the selection tendency of the residential property. This project was able to reach the following conclusion : Firstly, the housing development planning should be devised by the residential environment, including the view and the natural environment, not by the area. Secondly, the housing development planning in the other Kangnam area (area 2) and Kangbuk area (area 3) should embrace the business function, not the housing development only. Last, the housing development planning in Kangbuk area (area 3) should be able to enhance education and culture function and be connected by various transportation system. This project analyzes the change in the satisfaction degree on the residential environment and the selection tendency of the residential property. Thereafter, this project has the purpose of providing the aid in understanding of the basis of housing development information.

• 한국정보과학회논문지:정보통신
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• 제36권3호
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• pp.198-203
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• 2009

최근 멀티미디어 기술의 발달과 더불어 3차원 영상에 대한 연구가 활발하게 이루어지고 있다. 이 중 다시점 영상은 사실감 넘치는 화면을 사용자에게 제공하지만, 대역폭의 급격한 증가는 풀어야 할 주요 문제이다. 본 논문은 부호화 과정의 복잡도와 시간 소요를 줄일 수 있는 빠른 예측모드 결정 알고리즘을 제안한다. 이것은 빠르게 움직이는 전경 객체를 효과적으로 구분할 수 있는 객체 분할을 기반으로 한다. 빠른 움직임을 가진 전경 객체가 시점 방향 예측 모드로 부호화 될 가능성이 더 높기 때문에 움직임 보상 과정을 사전에 제한할 수 있다. 제안한 기법을 적용한 결과, 기존의 부호화 과정과 비교하여 화질의 큰 저하 없이 평균 45% 연산량이 감소하였다.

• Journal of Electrical Engineering and Technology
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• 제13권5호
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• pp.1807-1813
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• 2018

In this paper, the fault line selection and location problems of single line-to-ground (SLG) fault in distribution network are addressed. Firstly, the adaptive filtering property for empirical mode decomposition is formulated. Then in view of the different characteristics showed by the intrinsic mode functions(IMF) under different fault inception angles obtained by empirical mode decomposition, the sign of peak value about the low-frequency IMF and the capacitance transient energy is chosen as the fault line selection criteria according to the different proportion occupied by the low-frequency components. Finally, the fault location is determined based upon the comparison result with adjacent fault passage indicators' (FPI) waveform on the strength of the interaction between the distribution terminal unit(DTU) and the FPI. Moreover, the logic nodes regarding to fault line selection and location are newly expanded according to IEC61850, which also provides reference to acquaint the DTU or FPI's function and monitoring. The simulation results validate the effectiveness of the proposed fault line selection and location methods.

• 한국게임학회 논문지
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• 제1권1호
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• pp.55-60
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• 2001

With rapid development of graphic hardware, researches on Virtual Reality and 3D Games have received more attention than before. For more realistic 3D graphic scene, objects were to be presented with lots of polygons and the number of objects shown in a scene was remarkably increased. Therefore, for effective visualization of large polygon models like this, view-frustum culling method, that visualizes only objects shown in the screen, has been widely used. In general, the bounding boxes that include objects are generated firstly, and the boxes are intersected with view-frustum to check whether object is in the visible area or not. Recently, an algorithm that can check in-out test of objects using OpenGL's selection mode, which is originally used to select the objects in the screen, is suggested. This algorithm is fast because it can use hardware acceleration. In this study, by implementing and applying this algorithm to large polygon models, we showed the efficiency of OpenGL assisted View-Frustum Culling algorithm. If this algorithm is applied to 3D games that have to process more complicated characters and landscapes, performance improvement can be expected.

• 한국가정과학회지
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• 제1권1호
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• pp.27-43
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• 1998

The purposes of this study were to find the general trends of marriage-ideology reflected on the view of marriage of unmarried men and women, to estimate the differences according to related variables and to investigate relation of variables and marriage-ideology. The samples were selected from the unmarried 164 men and 235 women living in Kwang-ju. The major findings were as follows; 1. Unmarried men and women didn't reveal high level of marriage-ideology but men's marriage-ideology scores were higher than women. The overall tendencies were that women's achievement of vicarious status was more imporant than that of personal status, marriage was the male-leading union and men's conditions of mate-selection must be superior than woman. Unmarried men and women usually did not accept equality between sex and they have strong gender-stereotype. In the view of sexuality, premarital viriginity and extramarital intercourse were more rigid with woman and they took a serious view of man-centered kinship. 2. Marriage-ideology were significantly different according to mother's age, necessity of marriage, motive of marriage, marriage taboo according to family origin, the eldest son's parent care-giving, a notion of preferring a son. 3. Men and women's marriage-ideology was positively related to variables. Especially, women's marriage-ideology had high relation to motive of marriage and a notion of preferring a son. But women's marriage-ideology was negatively related to educational level. (Korean J Human Ecology 1(1) : 27∼43, 1998)

• 한국정보과학회논문지:데이타베이스
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• 제28권4호
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• pp.587-595
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• 2001

일반적으로 뷰라고 불리는 데이타 큐브의 일부를 실체화하여 저장하는 방법은 데이타 웨어하우스에서 많이 사용되는 기술이다. 유는 집계 함수로 정의되는 질의의 결과이다. 본 논문에서는 세분화된 뷰의 개념을 소개한다. 세분화된 뷰란 각 타원별로 정해진 구간에서의 집계 함수 결과이다. 이때 각 차원 별로 나누는 구간은 질의의 접근 형태를 기준으로 설정된다. 세분화된 뷰의 표현 및 선택을 위하여 AND-OR 큐브 그래프와 4ND-OR 최소 비용 그래프를 정의한다. 그리고, 이 구조체들을 이용하여 세분 화된 뷰 실체화 기법을 제안한다. 실험을 통해 제안하는 방법의 성능을 평가한다.

• 한국안광학회지
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• 제21권3호
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• pp.173-179
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• 2016

목적: 소비자들이 안경원을 어떻게 선택하는지에 관한 안경원 선택속성에 관한 중요도 순서와 안경원을 어떤 경로로 선택하게 되는지를 알 수 있는 정보원천에 관한 중요도의 순서를 매겨 안경원 경영에 도움이 되는 연구를 하고자 한다. 방법: 2015년 3월 10일부터 3월 31일 사이에 서울과 경기북부지역의 안경원을 방문한 고객을 대상으로 조사를 실시하였다. 분석방법은 기술통계를 사용하였으며 SPSS v.10.0 통계 패키지 프로그램을 이용하여 분석하였다. 결과: 안경원 선택속성 중요도 상위 5개는 "직원의 친절과 예의", "안경원의 청결", "고객 불만에 직원의 신속한 해결", "직원의 시력검사 및 조제가공실력", "고객 불만과 요구 처리"로 나타났다. 안경원 선택속성 중요도 하위 5개는 "사은품제공", "안경원의 규모나 크기", "개점시간 및 폐점시간", "편리한 주차시설", "호감 있는 직원 용모"인 것으로 나타났다. 안경원 정보원천 중요도 상위 2가지는 "과거의 이용경험", "가족, 친구, 친척 등의 추천으로"인 것으로 나타났다. 안경원 정보원천 중요도 하위 2가지는 "광고 등을 보고"와 "안경원의 특별한 외장을 보고"로 나타났다. 결론: 안경원 경영에서 중요한 점은 광고, 외관, 사은품과 같은 외적인 면보다는 안경사의 실력, 진심어린 고객응대, 과거의 이용경험 등의 내적역량인 것으로 나타났다.