• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2007년도 추계 학술대회논문집
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• pp.100-110
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• 2007

A new design approach for a delicate treatment of complex geometries such as a wing/body configuration is arranged using overset mesh technique under large scale computing environment for turbulent viscous flow. Various pre- and post-processing techniques which are required of overset flow analysis and sensitivity analysis codes are discussed for design optimization problems based on gradient based optimization method (GBOM). The overset flow analysis code is validated by comparing with the experimental data of a wing/body configuration (DLR-F4) from the 1st Drag Prediction Workshop (DPW-I). In order to examine the applicability of the present design tools, careful design works for the drag minimization problem of a wing/body configuration are carried out by using the developed aerodynamic shape optimization tools for the viscous flow over multiple-body aircraft geometries.

• 한국지하수토양환경학회지:지하수토양환경
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• 제16권2호
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• pp.12-29
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• 2011

Risk-based screening levels (RBSLs) of some pollutants for residential adults were derived with risk assessment tools developed by United States Environmental Protection Agency (USEPA), American Society for Testing and Materials (ASTM), and Korea Ministry of Environment (KMOE) and compared each other. To make the comparison simple, ingestion of soil, dermal contact with soil, outdoor inhalation of vapors, indoor inhalation of vapors, and inhalation of soil particulates were chosen as exposure pathways. The results showed that the derived RBSLs varied for every exposure pathway. For direct exposure pathways (i.e., ingestion of soil and dermal contact with soil), the derived RBSLs varied mainly due to the different default values for exposure factors and toxicity data. When identical default values for the parameters were used, the same RBSLs could be derived regardless of the assessment tools used. For inhalation of vapors and inhalation of soil particulates, however, different analysis methods for cross-media transfer rates were used and different assumptions were established for each tool, identical RBSLs could not be obtained even if the same default values for exposure factors were used. Especially for inhalation of soil particulates pathway, screening level derived using KMOE approach (most conservative) was approximately 5000~10000 times lower than the screening level derived using ASTM approach (least conservative). Our results suggest that, when deriving RBSL using a specific tool, it is a prerequisite to technically review the analysis methods for cross-media transfer rates as well as to understand how the assessment tool derives the default values for exposure factors.

• 한국정보처리학회논문지
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• 제4권5호
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• pp.1349-1357
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• 1997

정보통신의 발달과 더불어 새로이 제안되는 프로토콜의 크기가 커지고 복잡해짐에 따라 프로토콜 을 개발하는데 자동화 도구들이 필요하게 되었다. 따라서 이들 프로토콜의 개발을 지원하는 자동화 도구를 개발하기 위한 활발하게 진행중이다. 그러나 현재 까지 여러 가지 도구들이 개발되었으나, 이들 도구들은 실험적으로 사용되고 있을 분 이론적 연구성과에 비해 실제 활용도가 낮은 편이다. 또한 지금까지 제안된 도구들은 대부분 개별적으로 개발되어 프로토콜을 개발하는 일련의 과정을 수행하는데 제약이 따른다. 본 논문 에서는 이러한 제약을 해결키 위하여 기존에 개발된 도구들을 효과적으로 통합하여 프로토콜 개발을 위한 각종 도구들의 통합환경을 설계하고 구축하였다. 구축된 통합환경은 프도토콜 개발 과정의 전 사이클을 제공하므로서 자동화를 통한 프로토콜 개발 기간을 단축하고 프로토콜의 신뢰성을 향상시킬 수 있다.

• 실천공학교육논문지
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• 제16권3_spc호
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• pp.267-274
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• 2024

One challenge with teaching practical programming classes is the standardization of development tools on student computers. This is particularly true when a complicated setup process is required before beginning to code, or in remote classes, such as those necessitated by the COVID-19 pandemic, where the instructor cannot provide individual troubleshooting assistance. In such cases, students who encounter problems during the setup process may give up on the class altogether before even beginning to code. Therefore, this paper recommends using GitHub Codespaces as a tool for implementing standardized student development environments from day one. Codespaces provides Docker containers that an instructor can configure in such a way as to enable students to practice installing various coding tools within a controlled space, while also providing a language-specific, fully optimized development environment. In addition, Codespaces may be used more effectively in collaboration with GitHub Classroom, which helps instructors manage both the starter code and coding environment in which students work. In this paper, we compare two semesters of university Node.JS programming classes that utilized different development environments: one localized on student computers, the other containerized in Codespaces online. Then, we discuss how GitHub Codespaces and GitHub Classroom can be used to increase the effectiveness of practical programming classes while also increasing student engagement and programming confidence in class.

• 교육녹색환경연구
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• 제12권2호
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• pp.53-60
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• 2013

BIM(Building Information Modeling) is an indispensable tool to secure global competitiveness in construction sector, as already adapted significantly in European countries and U.S. In particular, as considering School Buildings constructed by BTL Method, using BIM tools are required for the accurate estimation of construction cost in planning stage, exact design and construction, well-judged settlement and performance of maintenance schedule. Therefore, this study investigates the BIM education status and the problems on using BIM tools through a survey of 100 BIM trainees and suggests improvement method of BIM education.

• International journal of advanced smart convergence
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• 제11권4호
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• pp.68-80
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• 2022

Since the launch of AI, technology development to implement complete and sophisticated AI functions has continued. In efforts to develop technologies for complete automation, Machine Learning techniques and deep learning techniques are mainly used. These techniques deal with supervised learning, unsupervised learning, and reinforcement learning as internal technical elements, and use the Big-data Analysis method again to set the cornerstone for decision-making. In addition, established decision-making is being improved through subsequent repetition and renewal of decision-making standards. In other words, big data analysis, which enables data classification and recognition/recognition, is important enough to be called a key technical element of AI function. Therefore, big data analysis itself is important and requires sophisticated analysis. In this study, among various tools that can analyze big data, we will use a Python program to find out what variables can affect addiction according to smartphone use in a decision tree environment. We the Python program checks whether data classification by decision tree shows the same performance as other tools, and sees if it can give reliability to decision-making about the addictiveness of smartphone use. Through the results of this study, it can be seen that there is no problem in performing big data analysis using any of the various statistical tools such as Python and R when analyzing big data.

• 해양환경안전학회지
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• 제7권3호
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• pp.85-92
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• 2001

Ship handling simulator has much merit to provide trainees with real-like circumstances in doing virtual education and training. To improve the quality of the education, it should be included both the mathematical model which can explain complicated ship's manoeuvrability and graphic tools for 3D images which can embody the visual scenes of reality on screen. This paper is focused on how to construct the marine environment DB(data Base) using S-57 data of ENC(Electronic Navigational Chart).

• 산업공학
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• 제16권1호
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• pp.8-15
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• 2003

With rapid growth of internet technology, companies have developed an information system such as the electronic catalog for product data in the E-Business. Due to the heuristic nature of the catalog search for proper tools in the specific process, the intelligent and user friendly methods residing in the search process give a comfortable environment even for the beginners in the field. In this paper, we develop a web based catalog for machining tools especially in Milling process. It has two distinct procedures for the users of the catalog; Search and Analysis. The Search is to select a proper cutter, insert, component combination in the developed relational database based on the cutting process and material. The Analysis is to suggest a recommended optimal cutting conditions based on the machining tools and selected materials. All of these procedures are stored in a server with a program based on the ASP and Java Script where the procedure is initiated by the client using the internet which is accessed through insert. With the success on implementing the above engineering database in the internet, we can provide the foundation for developing PDM with heuristic procedure.

• 한국산업보건학회지
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• 제9권2호
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• pp.52-65
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• 1999

This study was performed to evaluate the hand-arm vibration of the steel processing factory workers. Measurement, evaluation and as sessment were based on the International Standard(ISO 5349). The frequency weighted accelerations of the various hand-held tools and total exposure time were measured to assess the periods for the white finger symptom to occur. As a result, it was found that the air angle grinder and the air baby grinder are more harmful than other hand-held tools. It was also found that using various vibratory tools together is more harmful than using a single tool.

• 한국콘텐츠학회논문지
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• 제9권5호
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• pp.40-49
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• 2009

최근 임베디드 시스템 개발시간을 단축시키고 고객들의 요구사항을 충족시키기 위하여 많은 방법론과 개발환경 방법들이 제시되고 있다. 특히. 본 논문에서는 임베디드 시스템 개발 시 사용되는 교차개발환경을 개선하여 개발시간을 단축시키는 방법을 제안하였다. 이러한 방법은 가상 프로토타이핑 개발도구와 임베디드 시스템 개발 보드를 이용하여 개발환경을 하는 경우에 제한적으로 적용된다. 구현 및 실험결과 분석을 통하여 한 번 이상의 수정이 요구되는 교차개발환경에서는 기존 개발 방법보다 본 논문에서 제시한 방법이 우수함을 증명하였다.