• 한국산학기술학회논문지
• /
• 제10권6호
• /
• pp.1399-1406
• /
• 2009

단백질은 생물체의 주요 구성성분중의 하나로서 세포안에서 각종 화학반응의 촉매 역할을 담당하거나 항체를 형성하여 면역을 담당하는 등 중요 역할을 수행한다. 단백질의 기능은 단백질 분자들의 사슬이 3차원 구조를 형성하면서 결정이 되기 때문에 단백질의 3차원 구조에 대한 연구는 매우 중요하다. 본 연구에서는 두 개의 단백질 3차원 구조를 하나의 화면에서 비교, 관찰할 수 있는 그래픽 도구를 개발하였다. 개발된 도구는 단백질의 3차원 구조를 보여줄뿐 만 아니라 각종 비교 데이터를 제시하여 연구자들의 비교, 관찰이 용이하도록 지원한다.

• 대한인간공학회지
• /
• 제13권1호
• /
• pp.37-46
• /
• 1994

The accurate error size and discrimination region in the perception of depth amount from 3-dimensional images by the human visual system will be the basic data for the utilization and application of the binocular 3- eimensional image system. This paper is focused on studying the accuracy of the depth amount perceived from 3- dimensional images by the human visual system. From the performed experiment, the following results have been obtained: (1) The depth amount perceived from the binocular 3- dimensional images has been displayed by a proper scale of distance, and found to be imprecise and also have a large variance. (2) In utilizing the binocular 3-dimensional image system, it seems more appropriate to make the images viewed outward rather than inward from the screen in the regard of error and variance. (3) The binocular 3-dimensional image system can be effectively applied to displaying unreal space, for example, the layout of room in design, from the viewpoint of perception characteristics of depth amount.

• 대한인간공학회:학술대회논문집
• /
• 대한인간공학회 1994년도 춘계학술대회논문집
• /
• pp.19-31
• /
• 1994

The accurate error size and discrimination region in the perception of depth amount from 3- dimensional images by the human visual system will be the basic data for the utilization and application of the binocular 3 - Dimensional image system. This paper is focused on studying the accuracy of the depth amount perceived from 3-dimensional images by the human visual system. From the performed experiment, the following results have been obtained: (1) The depth amount perceived from the binocular 3-dimensional images has been displayed by a proper scale of distance, and found to be imprecise and also have a large variance. (2) In utilizing the binocular 3-dimensional image system, it seems more appropriate to make the images viewed outward rather than inward from the screen in the regard of error and variance. (3) The binocular 3- dimensional image system can be effectively applied to displaying unreal space, for example, the layout of room in design, from the viewpoint of perception characteristics of depth amount.

• 대한교통학회지
• /
• 제4권2호
• /
• pp.37-58
• /
• 1986

Since 1960's there have been conducted quite numbers of origin and destination (0-D) surveys in Korea, Most of them, however, were to be said not so successful. In this paper, it was investigated that why the previous 0-D surveys were failed, and that how it could be improved. The findings of this study are: 1. The collection of sample data itself was performed relatively well, but the problem was in the improper expansion methods which were applied. 2. To improve the expansion methods, it should be performed not only the dwelling unit-based sample surveys but also commercial vehicle survey, cordon line survey, screen line counts and other auxiliary travel surveys like transit patronage survey, vehicle miles survey etc. at the same time. 3. To expand the sample surveyed data in a proper way, the adjustment factors should take a disaggregate form and also should be applied not to the specific trips, but to the specific trip makers to avoid the bias which could be caused by the application of adjustment factors in a way that has been used previously. 4. If there is no considerable change in travel patterns, we can synthesize the present 0-D data with past surveyed sample data, using present statistic data in the same way which was developed in this paper when expanding and adjusting sample data.

• Journal of information and communication convergence engineering
• /
• 제16권2호
• /
• pp.125-129
• /
• 2018

In the field of computer graphics, rendering speed is one of the most important factors. Contemporary rendering is performed using 3D graphics systems with windowing system support. Since typical graphics systems, including OpenGL and the DirectX library, focus on the variety of graphics rendering features, the rendering process itself consists of many complicated operations. In contrast, early computer systems used direct manipulation of computer graphics hardware, and achieved simple and efficient graphics handling operations. We suggest an alternative method of accelerated 2D and 3D graphics output, based on directly accessing modern GPU hardware using the direct rendering manager (DRM) system. On the basis of this DRM support, we exchange the graphics instructions and graphics data directly, and achieve better performance than full 3D graphics systems. We present a prototype system for providing a set of simple 2D and 3D graphics primitives. Experimental results and their screen shots are included.

• 한국측량학회:학술대회논문집
• /
• 한국측량학회 2004년도 추계학술발표회 논문집
• /
• pp.465-471
• /
• 2004

The digital map expresses natural topographies and artificial things with 3D position coordinates in the computer such as the road, railway, building, river, mountain, paddy and dryland. Therefore, the digital map is regarded as an important factor in the information-oriented society. However, it is difficult to maintain the most recent topographic information all the times because of restricted budget and time. For that, the efficient method corresponded with the digital map should be presented. This study aims to suggest the way to make an estimate of updating cost for 1:5,000 scale digital map by using remotely sensed data. To predict updating area of the digital map, the screen digitizing method was applied to the overlapped images and digital map

• 한국정보통신학회논문지
• /
• 제11권11호
• /
• pp.2107-2115
• /
• 2007

본 논문에서는 3개의 정점으로 표현된 삼각형을 화면 좌표, 깊이 좌표, 색 등의 픽셀 정보로 바꾸는 스캔 변환 프로세서를 설계하였다. 설계된 스캔 변환 회로는 삼각형 변을 따라 스팬 라인을 생성한 후, 스팬 라인을 픽셀로 변환하는 스캔 라인 방식을 사용하였다. 그리고 좌변-상변 픽셀 채움 규칙을 지원함에 의해서 인접한 삼각형의 공유 변에 대한 픽셀이 중복 처리와 미처리 되는 것을 방지한다. 스캔 변환 프로세서 는 약 21,400개의 게이트로 구성되며, $0.35{\mu}m$ CMOS 공정 조건에서 약 80 Mhz의 동작 주파수를 가진다. 스캔 변환 프로세서는 최대 80 Mpixels/sec의 픽셀 생성 율을 갖고 있어 3차원 모바일 그래픽 분야에 적용 가능하다.

• Nuclear Engineering and Technology
• /
• 제39권3호
• /
• pp.215-220
• /
• 2007

The existing flooding Probabilistic Safety Analysis(PSA) was updated to reflect the Korean plant specific operating experience data into the flooding frequency to improve the PSA quality. Both the Nuclear Power Experience(NPE) database and the Korea Nuclear Pipe Failure Database(NuPIPE) databases were used in this study, and from these databases, only the Pressurized Water Reactor(PWR) data were used for the flooding frequencies of the flooding areas in the primary auxiliary building. With these databases and a Bayesian method, the flooding frequencies for the flooding areas were estimated. Subsequently, the Core Damage Frequency(CDF) for the flooding PSA of the Ulchin(UCN) unit 3 and 4 plants based on the Korean Standard Nuclear Power Plant(KSNP) internal full-power PSA model was recalculated. The evaluation results showed that sixteen flooding events are potentially significant according to the screening criterion, while there were two flooding events exceeding the screening criterion of the existing UCN 3 and 4 flooding PSA. The result was compared with two kinds of cases: (1) the flooding frequency and CDF from the method of the existing flooding PSA with the PWR and Boiled Water Reactor(BWR) data of the NPE database and the Maximum Likelihood Estimate(MLE) method and (2) the flooding frequency and CDF with the NPE database(PWR and BWR data), NuPIPE database, and a Bayesian method. From the comparison, a difference in CDF results was revealed more clearly between the CDF from this study and case (2) than between case (1) and case (2). That is, the number of flooding events exceeding the screen criterion further increased when only the PWR data were used for the primary auxiliary building than when the Korean specific data were used.

• The Plant Pathology Journal
• /
• 제36권6호
• /
• pp.558-569
• /
• 2020

Fusarium head blight (FHB) is a devastating fungal disease of wheat (Triticum aestivum L.). The lack of genetic resources with stable FHB resistance combined with a reliable and rapid screening method to evaluate FHB resistance is a major limitation to the development of FHB resistant wheat germplasm. The present study utilized an immature wheat spike culture method to screen wheat spike culture derived variants (SCDV) for FHB resistance. Mycotoxin concentrations determined by liquid chromatography-tandem mass spectrometry (LC-MS/MS) correlated significantly (P < 0.01) with FHB severity and disease progression during in vitro spike culture. Selected SCDV lines assessed for FHB resistance in a Fusarium field disease nursery in Carman, Manitoba, Canada in 2016 showed significant (P < 0.01) correlation of disease severity to the in vitro spike culture screening method. Selected resistant SCDV lines were also crossed with an elite cv. CDC Hughes and the progeny of F₂ and BC₁F₂ were screened by high resolution melt curve (HRM) analyses for the wheat UDP-glucosyl transferase gene (TaUGT-3B) single nucleotide polymorphism to identify resistant (T-allele) and susceptible (G-allele) markers. The progeny from the crosses were also screened for FHB severity using the immature spike culture method and identified resistant progeny grouped according to the HRM genotyping data. The results demonstrate a reliable approach using the immature spike culture to screen for FHB resistance in progeny of crosses in early stage of breeding programs.

• 응용통계연구
• /
• 제17권3호
• /
• pp.499-505
• /
• 2004

2수준 직교배열표를 이용한 실험자료에 대한 파레토 그림에 의한 분석 방법은 실무에서 많이 활용되고 있는데, 그 이유는 유의한 요인을 선별하기 위해서 분산분석법을 사용하지 않고 시각적이고 간결한 방법에 의하여 실험자료를 분석하기 때문이다. $L_{18}(2 \times 3^7)$ 직교배열표를 이용한 실험자료에 대한 분석방법으로 Park(1996)은 효과의 크기를 각 효과의 평균제곱으로 정의하고 파레토 원칙을 사용한 Pareto ANOVA를 제안하였다. 이 논문에서는 $L_{18}(2 \times 3^7)$ 실험자료에 대한 새로운 파레토 그림에 의한 분석 방법이 제시된다. 주요 요점은 3수준 효과의 크기를 일차와 이차 직교대비의 크기에 의해 분할하는 것이다.