• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권5호
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• pp.2346-2361
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• 2017

A major challenge in cloud infrastructure is the efficient allocation of virtual network elements on top of substrate network elements. Path algebra is a mathematical framework which allows the validation and convergence analysis of the mono-constraint or multi-constraint routing problems independently of the network topology or size. The present study proposes a new heuristic approach based on mathematical framework "paths algebra" to map virtual nodes and links to substrate nodes and paths in cloud. In this approach, we define a measure criterion to rank the substrate nodes, and map the virtual nodes to substrate nodes according to their ranks by using a greedy algorithm. In addition, considering multi-constraint routing in virtual link mapping stage, the used paths algebra framework allows a more flexible and extendable embedding. Obtained results of simulations show appropriate improvement in acceptance ratio of virtual networks and cost incurred by the infrastructure networks.

• 천문학논총
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• 제14권2호
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• pp.79-81
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• 1999

We have made an extensive mapping of the $^{13}CO$ J=1-0 transition line in the dark cloud L1535. We also constructed the $100{\mu}m$ IRAS map in the region. We found a semi-detached cloud component of $^{13}CO$ in the northeast direction of the $^{13}CO$ main cloud which forms a dumbbell-like structure. This additional component with an angular size of $20'\times16'$ has not been observed before in any molecular surveys of the cloud. The IRAS map shows a similar structure with two intensity peaks whose positions coincide with those of the $^{13}CO$ clouds.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 추계학술대회 논문집 학회본부 B
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• pp.514-516
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• 1998

A Mobile Robot should be able to navigate safely in the workspaces without any additional human's helps. In this paper, a method to generate the safe path to avoid the unknown obstacles using the pre-knowledge of the workspaces was proposed. For the efficiency of the algorithm, it is proposed to model the obstacles as the line segments in numerical map, which can reduce the required memory size and give the simple forms. To make the environments map, we used the Hough transform and the sonar measurements is converted to the set of line segments by Hough transform. In this algorithm, the subgoals are generated to avoid the obstacles until a mobile robot arrives the final position using the proposed environmental model.

• 한국의류산업학회지
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• 제3권3호
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• pp.235-240
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• 2001

This paper was intended to grasp an effect of body shaping by wearing girdle using moire topography. In wearing test, four type girdle were used, panty type, long leg type, high waist type, long leg and high waist type. Subjects were ten female college student (18-24 years old), they were selected on the size of the hip girth, waist girth that are within 25~75% in percent on the National Anthropometric survey of Korea in 1997. Three-dimentional characteristic of body shaping was analyzed by the moire topograph. As a result, body shaping effect was confirmed by moire pattern and horizantal section map. In case of the comparison through the moire topography, all the subjects have an effect on body shaping in part of waist girth, abdomen, and hip. Especially backside silhouettes on hip all the ten female subjects showed hip-up effect. Long leg type girdle was smooth side line in the hip and thigh. Further study required for the effect of wearing the girdle on the body shapeability and comfort.

• 융합신호처리학회 학술대회논문집
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• 한국신호처리시스템학회 2000년도 추계종합학술대회논문집
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• pp.45-48
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• 2000

지도영상은 숫자, 각종 심볼 그리고 지형적인 경계선, 도로, 강 등을 나타내는 라인 등으로 구성되어 있다. 본 연구에서는 기하학적인 관계를 이용하여 지도영상으로부터 지도정보를 추출하는 연구를 수행하였다. 제안된 이 방법은 연결성분만을 고려한 방법보다 개선된 방법으로 GIS 입력 모듈에 효율적으로 이용할 수 있다.

• 한국농공학회논문집
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• 제55권4호
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• pp.13-20
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• 2013

The purpose of this study was to evaluate the applicability of the HSPEXP expert system for the calibration of the Hydrological Simulation Program - Fortran (HSPF) for the study watershed. HSPEXP offers advice to the modeler, suggesting parameter changes that might result in better representation of a river basin and provides explanations supporting the recommended parameter changes. The study watershed, Sancheong, is located within the Nakdong River Basin and having the size of $1,072.4km^2$. Input data for the HSPF model were obtained from the landuse map, digital elevation map, meteorological data and others. Water flow data from 2006 to 2008 were used for calibration and from 2009 to 2010 were for validation. Using the HSPEXP expert system, hydrological parameters were adjusted based on total volume, then low flows, storm flows, and finally seasonal flows. For the calibration and validation period, all the HSPEXP model performance criteria were satisfied.

• 전기전자학회논문지
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• 제26권3호
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• pp.408-415
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• 2022

본 논문에서는 효율적인 feature map 추출 네트워크를 이용한 2D 이미지에서의 3D 포인트 클라우드 재구축 기법을 제안한다. 본 논문에서 제안한 기법의 독창성은 다음과 같다. 첫 번째로, 메모리 측면에서 기존 기법보다 약 27% 더 효율적인 새로운 feature map 추출 네트워크를 사용한다. 제안하는 네트워크는 딥러닝 네트워크의 중간까지 크기 축소를 수행하지 않아, 3D 포인트 클라우드 재구축에 필요한 중요한 정보가 유실되지 않았다. 축소되지 않은 이미지 크기로 인해 발생하는 메모리 증가 문제는 채널의 개수를 줄이고 딥러닝 네트워크의 깊이를 얕게 효율적으로 구성하여 해결하였다. 두 번째로, 2D 이미지의 고해상도 feature를 보존하여 정확도를 기존 기법보다 향상시킬 수 있도록 하였다. 축소되지 않은 이미지로부터 추출한 feature map은 기존의 방법보다 자세한 정보가 담겨있어 3D 포인트 클라우드의 재구축 정확도를 향상시킬 수 있다. 세 번째로, 촬영 정보를 필요로 하지 않는 divergence loss를 사용한다. 2D 이미지뿐만 아니라 촬영 각도가 학습에 필요하다는 사항은 그만큼 데이터셋이 자세한 정보를 담고 있어야 하며 데이터셋의 구축을 어렵게 만드는 단점이다. 본 논문에서는 추가적인 촬영 정보 없이 무작위성을 통해 정보의 다양성을 늘려 3D 포인트 클라우드의 재구축 정확도가 높아질 수 있도록 하였다. 제안하는 기법의 성능을 객관적으로 평가하기 위해 ShapeNet 데이터셋을 이용하여 비교 논문들과 같은 방법으로 실험한 결과, 본 논문에서 제안하는 기법의 CD 값이 5.87, EMD 값이 5.81 FLOPs 값이 2.9G로 산출되었다. 한편, CD, EMD 수치가 낮을수록, 재구축한 3D 포인트 클라우드가 원본에 근접하는 정확도가 향상된 결과를 나타낸다. 또한, FLOPs 수치가 낮을수록 딥러닝 네트워크에 필요한 메모리가 적게 소요되는 결과를 나타낸다. 따라서, 제안하는 기법의 CD, EMD, FLOPs 성능평가 결과가 다른 논문의 기법들보다 메모리 측면에서 약 27%, 정확도 측면에서 약 6.3% 향상된 결과를 나타내어 객관적인 성능이 입증되었다.

• 한국의류학회지
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• 제34권4호
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• pp.673-685
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• 2010

This study evaluates the fitness of brassieres through size measurement, comparative pattern analysis, cross section map analysis, 3-D shape analysis number, and fitness evaluation with a focus on domestic and overseas brands. Experimental brassieres were selected as mold brassieres of 3/4 cup in 75A size that is considered a popular design. Brands of selected brassiere were 2 domestic brands (A, B), 1 licensed brand (C), and 2 overseas brands (D, E). Subjects were 8 women in their early 20's. Data were analyzed by descriptive statistics, analysis of variance, reliability analysis, and factor analysis. The results were as follows; the size and pattern of brassieres showed a difference by each brand even though brassieres are the same design. In the wearing effect of brassieres, overseas brand brassieres played a major role in the breast-up effect, but they were not appropriate for the somatotype of Korean women. Domestic brand brassieres showed the volume-up effect, that was confirmed by the increasing bust circumference, bust depth when subjects wore it. In addition, the licensed brand brassieres showed the correction effect of body shape. Therefore, when purchasing a brassiere, the most important condition is to consider the individual characteristics of the somatotype. The results of factor analysis through a functional evaluation show that wearing satisfaction, size satisfaction, and the position of the bust point were important factors for fitness satisfaction and purchase.

• 한국측량학회지
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• 제20권3호
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• pp.303-311
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• 2002

최근에 GIS 기법을 이용하여 수문 분석에 필요한 지형 매개변수를 분석하는 연구가 활발히 진행되고 있는 실정이다. 지형 분석에 이용되는 DEM은 수치 지형도의 등고선 자료를 이용하여 효과적으로 구축될 수 있다. 따라서 DEM의 응용성이 여러 분야에서 점차 증가되고 있는 실정이다. 본 연구에서는 지형 매개변수 추출시 DEM 격자크기가 경사와 배수 유역에 어떤 영향을 주는지를 분석하고자 20m∼100m 격자 크기의 DEM이 평창강과 주방천 유역에 적용되었다. 본 연구에서는 DEM 격자크기에 따른 경사변화에 대한 회귀 방정식을 도출하였다. 그 결과 DEM 격자크기가 증가함에 따라 경사가 줄어들며, 배수 유역면적은 거의 변화하지 않는다는 것을 알 수 있었다.

• 한국육종학회지
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• 제42권1호
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• pp.23-27
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• 2010

The objective of this study was to map the gene for reduced embryo size in rice using DNA markers. The reduced embryo size mutant was induced from N-methyl-N-nitrosourea (MNU) treated Taichung 65. Genetic analysis revealed that the phenotype of the reduced embryo was controlled by a single recessive gene, designated as re-1. For mapping the gene controlling embryo size, an $F_2$ population was developed from a cross between the Korean Tongil-type, Milyang 23 (Oryza sativa ssp. indica) and the mutant. The ratio of $F_2$ seeds nearly fitted to 3:1 ratio, indicating that this phenotype was controlled by a single recessive gene. Bulked sergeant analysis was performed with SSR markers. The gene for the reduced embryo size was detected on chromosome 1. The gene was further mapped between two SSR markers, RM315 and RM265 on chromosome 1 (approximately 1.5 Mb interval). The linked markers will facilitate selection of this grain character in a breeding program and provide the foundation for positional cloning of this gene.