• Journal of information and communication convergence engineering
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• 제21권4호
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• pp.261-267
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• 2023

Public research, which requires large computational resources, utilizes the supercomputers of the National Supercomputing Center in the Republic of Korea. The average utilization rate of resources over the past three years reached 80%. Therefore, to ensure the operational stability of this national infrastructure, specialized centers have been established to distribute the computational demand concentrated in the national centers. It is necessary to predict the computational demand accurately to build an appropriate resource scale. Therefore, it is important to estimate the inflow and outflow of computational demand between the national and specialized centers to size the resources required to construct specialized centers. We conducted a logit model analysis using the probabilistic utility theory to derive the preferences of individual users for future supercomputer resources. This analysis shows that the computational demand share of specialized centers is 59.5%, which exceeds the resource utilization plan of existing specialized centers.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 1997년도 학술발표회 논문집
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• pp.3-10
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• 1997

• 대한수학교육학회지:학교수학
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• 제11권4호
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• pp.745-771
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• 2009

본 연구는 학생들의 곱셈 전략 발달 과정을 분석하기 위하여 초등학교 저학년의 곱셈 전략과 계산 자원 분석을 위한 틀을 계발하고 이 틀을 이용하여 초등학교 저학년생들의 곱셈 문제 해결 전략 발달 과정을 분석하였다. 연구 결과, 학생들의 학년과 수학 학습 수준에 따라 곱셈 전략 발달에 일정한 흐름이 있음을 확인하였다. 또, 곱셈의 교환 법칙이 두 자리 수를 포함하는 곱셈 문제에서 전략 발달에 중요한 역할을 한다는 것과, 곱셈 전략의 발달을 위해 곱셈 계산 자원의 획득이 반드시 선행되어야 한다는 사실을 알 수 있었다.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2002년도 추계 학술대회논문집
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• pp.71-77
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• 2002

The grid technology is believed to be the next generation research tool for both computational and experimental scientists. With advanced network technologies and middleware, geographically distributed facilities can be tightly connected to provided a huge amount of resources or remote accessibility, In this paper, an overview of grid technology will be introduced with an emphasis in application to computational fluid dynamics. The computational fluid dynamics, which involves solution of partial differential equations, is basically limited by the computing power, With the grid technology, virtually unlimited resources are provided. The schematic structure of middleware and grid environment, as well as some preliminary results are presented.

• 전산구조공학
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• 제19권1호
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• pp.50-52
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• 2006

• 한국시뮬레이션학회논문지
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• 제23권4호
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• pp.219-228
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• 2014

분산 환경에 존재하는 다양한 이기종의 계산 자원은 가상화 기술을 통해 통합된 고성능 컴퓨팅 환경을 구축한다. 최근, 사용자 수준의 향상으로 인해 복잡한 응용 작업의 처리에 대한 요구가 증가하고 있으며, 이는 고성능 컴퓨팅에 대한 수요로 이어지고 있다. 사용자가 요구하는 각각의 작업에는 데이터가 포함되어 있고, 각각의 데이터는 고유의 특성을 가지고 있으므로, 작업의 분류와 처리는 데이터의 특성이 고려되어야 한다. 본 논문에서는 분산 환경에서 계산 자원의 효율 증대를 위한 데이터 특성 기반의 작업 분류방법(JCDT : Job Classifying method based on Data Traits for Increased Efficiency of Computational Resources in Distributed Environment) 을 제안한다. 제안하는 JCDT 는 사용자가 요구하는 작업이 지닌 데이터의 특성을 기반으로 작업을 분류하여, 계산 자원의 효율 증대와 작업 처리속도를 향상시킬 수 있을 것으로 기대한다.

• Structural Engineering and Mechanics
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• 제69권1호
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• pp.33-42
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• 2019

Thermal cracks are cracks that commonly form at early ages in mass concrete. During the concrete pouring process, the elastic modulus changes continuously. This requires the time domain to be divided into several steps in order to solve for the temperature, stress, and displacement of the concrete. Numerical simulations of thermal crack propagation in concrete are more difficult at early ages. To solve this problem, this study divides crack propagation in concrete at early ages into two cases: the case in which cracks do not propagate but the elastic modulus of the concrete changes and the case in which cracks propagate at a certain time. This paper provides computational models for these two cases by integrating the characteristics of the extended finite element algorithm, compiles the corresponding computational programs, and verifies the accuracy of the proposed model using numerical comparisons. The model presented in this paper has the advantages of high computational accuracy and stable results in resolving thermal cracking and its propagation in concrete at early ages.

• 한국CDE학회논문집
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• 제4권3호
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• pp.238-246
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• 1999

The modeling method to support product development processes (PDP) must have certain characteristics including the ability to represent multiple viewpoints of the product development and integrate with currently available analysis and design methods based on CE concept. This paper describes the reference model to support multiple viewpoints (PPO: Products, Processes, and Organizations/Resources viewpoints) of the product development processes, from which each model (Products model, Processes model, and Organizations/Resources model) can be extracted, as well as produces PPO data schema. This reference model has associative relationships among the products, processes, and organizations/resources. To allow the extensibility to support design evolution, we propose structured dat representation methods using semantic network, which can be constructed through first-order logic. The product development processes is so represented by specifying entities and semantic relationships among them hat he appropriate information can be accessed and all of the relevant attributes about the entities can be retrieved simultaneously.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권8호
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• pp.4057-4071
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• 2018

The software centered world following the fourth industrial revolution is rapidly approaching us. Countries around the world attach importance to software's ability as one of the key elements for training future human resources. In order to train software centered human resources, each university has designated Software Education as an essential curriculum for not only major but also non-majors. In the past Software Education was an education for a major, but recent Software Education was changed to the essential education that is necessary for all living in the software centered world. In the past the curriculum was focused on software development and implementation-oriented education, but recent curriculum emphasizes sequential arranging and thinking of problem solving. In order to reflect trends in recent Software Education in detail, we integrate Software Education with major concept of Computational Thinking. In this paper, we analyzed the effect of the main concept of Computational Thinking on Software Education for non-majored learners who received Software Education based on Computational Thinking (here refers to learners who major in humanities, social sciences and arts). In addition, research models of satisfaction, self-efficacy, and occupational change was established as the elements of Software Education, and it was found that there was a relation between Computational Thinking and Software Education.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2007년도 정기 학술대회 논문집
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• pp.719-724
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• 2007

Many engineering problems often require the large amount of computing resources for iterative simulations of problems treating many parameters and input files. In order to overcome the situation, this paper proposes an e-Science based computational system. The system exploits the Grid computing technology to establish an integrated web service environment which supports distributed high throughput computational simulations and remote executions. The proposed system provides an easy-to-use parametric study service where a computational service includes real time monitoring. To verify usability of the proposed system, two kinds of applications were introduced. The first application is an Aerospace Integrated Research System (e-AIRS). The e-AIRS adapts the proposed computational system to solve CFD problems. The second one is design and optimization of protein 3-dimensional structures.