• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2003년도 봄 학술발표논문집 Vol.30 No.1 (B)
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• pp.160-162
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• 2003

컴퓨터의 파워가 증대됨에 따라 데이터의 처리속도도 증가했지만 더불어 사회의 복잡도가 증가함에 따라 처리해야 할 데이터도 증가하고있다. 이에 병렬처리, 클러스터, P2P, 그리드등 분산된 컴퓨터들의 파워를 하나로 묶어 이러한 문제를 처리하려는 움직임이 있다. 하지만 이러한 연구들은 최종사용자들에게 분산환경에 대한인지를 요구하고 있어 개발에 어려움이 있다. 또한 일반 프로그래밍 언어로 개발된 프로그램을 분산된 환경에서 실행하는 것은 쉽지 않다. 이에 언어적인 차원에서 분산환경을 지원하는 DVM 및 DESPL을 제안하고자 한다.

• Journal of the korean society of oceanography
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• 제32권1호
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• pp.38-45
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• 1997

To find out the changes in vertical distribution patterns over the 24-h period, a key and the first step to tackle the problem of adaptive significance of diel vertical migration (DVM), vertically stratified time series samplings with multiple opening/closing plankton samplers were done in the East Sea of Korea (Sea of Japan). Sampling was done almost every 4 h for one day period following the same water parcel in Nov. 1995 and May 1996, respectively. Resultant patterns of vertical distribution showed that some species such as most abundant taxa Metridia pacifica and Scolecithyicella minor, both Copepoda, performed DVM even in the study area of strong thermal stratification. Their patterns of DVM such as distance scales and timing of movements were not the same each other, and they were separated from other taxa in the dendrogram obtained by the cluster analyses, Most minor taxa grouped in one, however, seemed not to do DVM in the study area of strong thermal stratification. They usually preferred the warmer surface layer where the foods were probably more abundant.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2004년도 하계학술발표 논문집
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• pp.211-211
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• 2004

• Journal of Mechanical Science and Technology
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• 제16권4호
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• pp.532-548
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• 2002

A hybrid model consisting of a modified TAB (Taylor Analogy Breakup) model and DVM (Discrete Vortex Method) is proposed for numerical analysis of the evaporating spray phenomena in diesel engines. The simulation process of the hybrid model is divided into three steps. First, the droplet breakup of injected fuel is analyzed by using the modified TAB model. Second, spray evaporation is calculated based on the theory of Siebers'liquid length. The liquid length analysis of injected fuel is used to integrate the modified TAB model and DVM. Lastly, both ambient gas flow and inner vortex flow of injected fuel are analyzed by using DVM. An experiment with an evaporative free spray at the early stage of its injection was conducted under in-cylinder like conditions to examine an accuracy of the present hybrid model. The calculated results of the gas jet flow by DVM agree well with the experimental results. The calculated and experimental results all confirm that the ambient gas flow dominates the downstream diesel spray flow.

• 한국컴퓨터정보학회논문지
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• 제17권6호
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• pp.83-92
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• 2012

이 논문에서는 십진수의 매트릭스 방법 (DVM) 을 이용한 새로운 방법으로 불리언 논리를 최소화할 때 최소항을 그룹화 하여 표시하는 방법을 제안하고 있다. DVM 방법은 매트릭스 방법을 이용하여 최소항에 관한 이진수의 차이를 십진수 형태로 변환하는 과정을 거치고, 결합할 수 있는 최소항을 직접 확인할 수 있다. 십진수의 매트릭스 방법은 시각적 접근에 따른 새로운 매트릭스이지만, 경우에 따라 주어진 셀 값을 그룹화 하는데 있어서 도형이 복잡해지기도 하는 문제점이 있다. 이 논문은 이러한 문제점을 해결하기 위한 연구로, 십진수의 매트릭스 방법에 최소항의 다단계 그룹을포함하는 기법을 제안하고 있다. 이 연구에서 제시하는 방법은 최소항의 그룹을 간결한 시각적인 방법으로 표현 하였으므로, 관련된 최소항을 구체적으로 파악하는 수단으로 사용할 수 있다.

• 한국정밀공학회지
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• 제20권5호
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• pp.47-56
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• 2003

Geometric cutting-simulation and verification play an important role in detecting NC machining errors in mold & die manufacturing and thereby reducing correcting time & cost on the shop floor. Current researches in the area may be categorized into view-based, solid-based, and discrete vector-based methods mainly depending on workpiece models. Each methodology has its own strengths and weaknesses in terms of computing speed, representation accuracy, and its ability of numerical inspection. The paper proposes a hybrid modeling scheme for workpiece representation with z-map model and discrete vector model, which performs 3-axis and 5-axis cutting-simulation via tool swept surface construction by connecting a sequence of silhouette curves.

• 대한조선학회논문집
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• 제46권3호
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• pp.249-258
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• 2009

DVM (Discrete Vortex Method) is a numerical scheme that handles discrete vortex particles to express continuous vorticity field. This scheme is proper to VIV (Vortex Induced Vibration) analysis because there is no need to generate field grids and VIV is caused by separated vorticity from the body. When DVM is applied to VIV analysis, there are some applicable schemes such as using vortex blobs, integral method for computing induced velocity, etc. In this study, the influences of these schemes are investigated and the practical scheme that is appropriate for VIV analysis is proposed.

• 월간낙농육우
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• 제21권10호통권234호
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• pp.149-153
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• 2001

• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 1999년도 제15회 하계 학술발표회 논문집
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• pp.245-265
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• 1999

MAUT and AHP are widely used for quantification of subjective judgements in various fields of decision making. This study focuses on the introduction and application of MAUT/AHP method which is a hybrid of MAUT and AHP techniques in R&D project priority setting. This hybrid model can clarify each factors' contribution using MAUT method and can reduce the number of pairwise comparisons of AHP method. This study applies AMUT/AHP method to the evaluation of R&D projects in a Government - funded research institute. To evaluate R&D projects, six evaluation factors are derived. SMART(Simple MultiAttribute Rating Technique) and DVM(Difference Value Measurement ) out of many MAUT methods are used to design the utility function ad AHP is used to allocate the weights among evaluation factors. The major findings of this study can be summarized as follows. First, the SMART/AHP and the DVM/AHP have the same results with the SMART and the DVM, and they are different results with AHP. It is very hard to decide which one is better. Second, MAUT/AHP's strength is analyzed. MAUT reflects utility values of evaluators to alternatives and AHP results objective and consistent weights of factors through pariwise comparisons. Third, its possible application fields are proposed. It is applicable to subjective decision making problems with high complexity and inter-independent factors.

• 한국임상수의학회:학술대회논문집
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• 한국임상수의학회 2008년도 춘계학술대회
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• pp.3-4
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• 2008