• 한국CDE학회논문집
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• 제3권3호
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• pp.177-182
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• 1998

The computer related techniques have been developed rapidly in the field of metal removal industry. The electronic catalog for mechanical elements is one of such developments realized in recent years. As the emergence of the electronic catalogs in the 90s, it breaks the restriction of the traditional catalog and becomes a helpful and efficient tool in the field. In this paper, we develop an electronic catalog for the cutting tools of the Korea Tungsten Co. Ltd. The catalog consists of three parts: a preprocessor for tool selection, a database for tool, and a postprocessor for search result. A preprocessor for tool selection is developed under a user-friendly consideration. A database for tool consists of milling, drilling, and reaming tools with a list of cutters, inserts, and components. A postprocessor for search result consists of weight, dimension. drawing, product order number etc. of the tools. It also suggests the optimized cutting condition of the selected tool using a neural network technique which is done by an independent research group.

• 한국전산유체공학회지
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• 제8권2호
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• pp.42-48
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• 2003

The issues associated with the application of CFD for ship design are addressed. Doubtlessly at the moment, CFD tools are very useful in evaluating hull forms prior to traditional towing tank tests. However, time-consuming pre-processing is an obstacle in the daily application of CFD tools to improve hull forms. The accuracy of computational modeling without sacrificing the usability of CFD system is also to be assessed. The wave generation is still predicted by using potential panel methods, while velocity profiles entering into propeller plane is solved using turbulent flow solvers. The choice of turbulence model is a key to predict nominal wake distribution within acceptable accuracy. The experimental data for CFD validation are invaluable to improve physical and numerical modeling. Other applications of CFD for ship design than hull form improvement are also given. It is certain that CFD can be a cost-effective tool for the design of new and better ships.

• Journal of Radiation Protection and Research
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• 제46권4호
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• pp.151-159
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• 2021

Background: Computed tomography (CT) is one of the crucial diagnostic tools in modern medicine. However, careful monitoring of radiation dose for CT patients is essential since the procedure involves ionizing radiation, a known carcinogen. Materials and Methods: The most desirable CT dose descriptor for risk analysis is the organ absorbed dose. A variety of CT organ dose calculators currently available were reviewed in this article. Results and Discussion: Key common elements included in CT dose calculators were discussed and compared, such as computational human phantoms, CT scanner models, organ dose database, effective dose calculation methods, tube current modulation modeling, and user interface platforms. Conclusion: It is envisioned that more research needs to be conducted to more accurately map CT coverage on computational human phantoms, to automatically segment organs and tissues for patient-specific dose calculations, and to accurately estimate radiation dose in the cone beam computed tomography process during image-guided radiation therapy.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제29권1호
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• pp.19-33
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• 2015

최근 주요 산업 분야에서 인간 사고와 컴퓨터 능력의 통합을 의미하는 '컴퓨팅 사고력(Computational thinking)'에 대한 요구가 급격히 증가해 왔다. 이에 따라 선진국은 지난 20여년간 수학교과의 수학적 추론, 수학적 문제 해결, 수학적 의사소통을 하는 과정에 CAS(Computation Algebra System)를 활용하여 수학문제를 해결하는 방법으로 자연스럽게 학생들의 '컴퓨팅 사고력'을 향상시켜왔다. 이러한 변화에 발을 맞추어 우리나라의 2009 개정 교육과정에 따른 수학과 교육과정 교과서들도 다양한 CAS 도구에 대한 활용을 담아 '컴퓨팅 사고력'의 향상에 발을 맞추고 있다. 본 연구는 국내 외 '컴퓨팅 사고력' 기반 교육 사례를 분석하고, '컴퓨팅 사고력' 향상에 도움이 되는 CAS 도구 특히 PC 및 모바일 기기를 이용하여 언제 어디서나 무료로 사용할 수 있는 Sage 도구를 이용한 수학교육 및 수학교과목 구성에 대하여 논한다. 또 구체적인 '컴퓨팅 사고력' 기반 수학교육 모델을 설계하여 대학 수학교육현장에 활용한 내용의 보고를 통하여, 향후 수학교육을 통한 '컴퓨팅 사고력' 향상에 대한 구체적인 방안을 제시한다.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2006년 제4회 한국유체공학학술대회 논문집
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• pp.33-36
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• 2006

As the computing environment is rapidly improved, the interests of CFD are gradually focused on large-scale computation over complex geometry. Keeping pace with the trend, essential computational tools to obtain solutions of complex aerospace flow analysis and design problems are examined. An accurate and efficient flow analysis and design codes for large-scale aerospace problem are presented in this work. With regard to original numerical schemes for flow analysis, high-fidelity flux schemes such as RoeM, AUSMPW+ and higher order interpolation schemes such as MLP (Multi-dimensional Limiting Process) are presented. Concerning the grid representation method, a general-purpose basis code which can handle multi-block system and overset grid system simultaneously is constructed. In respect to design optimization, the importance of turbulent sensitivity is investigated. And design tools to predict highly turbulent flows and its sensitivity accurately by fully differentiating turbulent transport equations are presented. Especially, a new sensitivity analysis treatment and geometric representation method to resolve the basic flow characteristics are presented. Exploiting these tools, the capability of the proposed approach to handle complex aerospace simulation and design problems is tested by computing several flow analysis and design problems.

• 한국CDE학회논문집
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• 제9권1호
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• pp.62-76
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• 2004

Many customers are no longer satisfied with mass-produced goods. They are demanding customization and rapid delivery of innovative products. Many companies are now realizing that the best way to reduce life cycle costs is to evolve a more effective product development paradigm using Internet and web based technologies. Yet there remains a gap between current market demands and product development paradigms. The existing CAD systems require that product developers possess all the design analysis tools in-house making it impractical to employ all the needed and newest tools. Hence, this paper addresses how assembly operation analysis can be embedded transparently and remotely into a service-oriented collaborative assembly design environment. A new assembly operation analysis framework is introduced and a relevant architecture and tools are developed to realize the framework. Instead of the current sequential process for verifying and validating an assembly design, a new Virtual Assembly Analysis (VAA) method is introduced in the paper to predict the various effects of joining during actual collaborative design. As a case study, arc welding and riveting processes are investigated. New service-oriented VAA architecture and its VAA components are proposed and implemented on prototype mechanical assemblies.

• 전산구조공학
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• 제17권3호
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• pp.57-64
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• 2004

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2006년도 추계 학술대회논문집
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• pp.208-208
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• 2006

• 인터넷정보학회논문지
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• 제19권1호
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• pp.123-130
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• 2018

With the emergence of a new paradigm called Open Science and Big Data, the need for data sharing and collaboration is also emerging in the computational science field. This paper, we analyzed data-driven research cases for computational science by field; material design, bioinformatics, high energy physics. We also studied the characteristics of the computational science data and the data management issues. To manage computational science data effectively it is required to have data quality management, increased data reliability, flexibility to support a variety of data types, and tools for analysis and linkage to the computing infrastructure. In addition, we analyzed trends of platform technology for efficient sharing and management of computational science data. The main contribution of this paper is to review the various computational science data repositories and related platform technologies to analyze the characteristics of computational science data and the problems of data management, and to present design considerations for building a future computational science data platform.

• 정보교육학회논문지
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• 제23권4호
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• pp.375-384
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• 2019

4차 산업혁명에 따라 빠르게 변화되는 사회에서 미래 인재는 지식의 양이 아닌 질적으로 수준 높은 지식을 활용하고 구성하는 능력이 요구되고 있다. 2015 개정 교육과정의 출범에 따라 역량 중심으로 교육과정이 개편되었으며 소프트웨어 교육에서는 '정보문화소양', '컴퓨팅 사고력', '협력적 문제 해결력'의 역량을 추구하고 있다. 본 연구에서는 미래인재의 역량인 협력적 문제해결력을 함양하기 위해서는 교육 현장에서 교사가 손쉽게 활용 가능한 협업도구와 이를 활용한 SW교육 프로그램을 개발한다. 이러한 협업도구를 활용한 SW교육프로그램은 프로그래밍 언어와 문법에 대한 지식, 프로그래밍 기법에 대해 배우는 것보다 짝프로그래밍을 통해 컴퓨팅 사고력과 협력적 문제해결력을 함양할 수 있다. 총 16차시로 구성된 수업에서 협업도구를 활용한 짝프로그래밍을 통해 수업이 참가한 학생들의 협력적 문제해결력과 코딩 이해도를 향상시킴을 보여준다.