• Journal of the Korea Society for Simulation
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• v.22 no.4
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• pp.129-138
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• 2013

This paper studies the improvement of a pre-processing line for waste refrigerators in a metropolitan recycling center(MRC). We performed ARENA modeling and simulation by using work analysis and time measurement on the current processing line. Combined this result with some practical experiences from workers, we generated 3 alternatives to improve the current line and evaluated them by using ARENA simulation. The final decision selected consists of changing 2-line process into 1-line and having a separate cell-line for collecting refrigerant. Currently, the result of this study was applied to MRC by improving cycle time, throughput, and space utilization compared to the previous one.

• Plant Journal
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• v.16 no.4
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• pp.33-39
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• 2020

For several decades, productivity in construction industry has been regressed and it is inevitable to improve productivity for major EPC players. One of challenges to achieve this goal is automatically extracting information from imaged drawings. Although computer vision technique has been advanced rapidly, it is still a problem to detect pipe lines in a drawing. Earlier works for line detection have problems that detected line elements be broken into small pieces and accuracy of detection is not enough for engineers. Thus, we adopted Contour and Hough Transform algorithm and reinforced these to improve detection results. First, Contour algorithm is used with Ramer Douglas Peucker algorithm(RDP). Weakness of contour algorithm is that some blank spaces are occasionally found in the middle of lines and RDP covers them around 17%. Second, HEC Hough Transform algorithm, we propose on this paper, is improved version of Hough Transform. It adopted iteration of Hough Transform and merged detected lines by conventional Hough Transform based on Euclidean Distance. As a result, performance of Our proposed method improved by 30% than previous.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.2 no.3
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• pp.76-83
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• 2003

Recently, the field of the engineering has been studied about optimum design continuously. Verified data by comparison with simulation and dynamic characteristic analysis enables the design of a machine tool to be modified easily and effectively concerning to the mode shape of the vibration. Especially, BC-500 Line Center has got some problems causing vibration which mainly come from Column and ATC part. So it is necessary to solve those problems by the two kinds of method such as changing structural design and reinforcing with ribs. In this paper, column and ATC part of BC-500 Line center are modified by an optimum design by the analysing method of FEM to avoid vibration. As a result, a more stable machine tool was designed by this simulation as optimum condition.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.2 no.2
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• pp.75-83
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• 2003

Recently, the machine tools have been needed for high speed and accuracy to increase productivity. The most Important thing to get a more stabilized machine is to know the frequency response which has an effect on manufacture a lot. This problem should be considered seriously by many researchers. There are many application programs about FEM but Just using FEM program to get information of the object is not enough to put our confidence in the stability of the machine tool design. Therefore, the purpose of this research is to make a study for proving one of the ways to design to produce stabilized a machine more efficiently by comparing FRT method and FEM. At these two tests, we can learn about the frequency response area causing resonance and we can reconfirm the result to trust.

• Journal of the Korean Association of Geographic Information Studies
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• v.27 no.3
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• pp.60-75
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• 2024

Research on health outcomes of environmental factors has been implemented by multiple and interacting factors, including environmental, socio-demographic, economic, and traffic aspects. There are still significant challenges and limitations in constructing databases for the connections between contributing factors and an integrated approach to environmental health research even though there has been a dramatic increase in data availability and incredible technological advance in data storage and processing. This study emphasizes the necessity of establishing a geospatial data pipeline to analyze the impact of environmental factors on health. It also highlights the difficulties and solutions related to the construction and utilization of a geospatial database. Key challenges include diverse data sources and formats, different spatio-temporal data structures, and coordinate system inconsistencies over time within the same geospatial data. To address these issues, a data pipeline was constructed with pre-processing and post-processing for the data, resulting in refined datasets that could be used for calculating geographic variables. In addition, an AWS-based relational database and shared platform were established to provide an efficient environment for data storage and analysis. Guidelines for each step of the process, including data management and analysis, were developed to enable future researchers to effectively use the data pipeline.

• Digital Contents
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• no.12 s.67
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• pp.40-41
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• 1998

외국산 제품 일색이던 OLAP 시장에 '파워*씨'라는 국산 제품이 출시되어 가능성을 열어주고 있다. 주위의 힘들다던 만류에도 불구하고 이제는 외국으로의 진출까지 고려하고 있는 모던정보 공학을 찾아가 '파워*씨'의 개발과정 및 향후 계획에 대해 들어봤다.

• Digital Contents
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• no.11 s.78
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• pp.40-41
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• 1999

3/4분기 우수 IP상의 수상작으로 공익부문에 '(주)아카데미인프라', 생활부문에 '(주)유엘정보통신', 오락부문에 '라임'이 선정되어 지난달 19일 정보통신부에서 남궁 석 장관 등 관련 인사가 참석한 가운데 시상식이 있었다.

• Digital Contents
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• no.2 s.57
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• pp.4-10
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• 1998

지난해 말부터 시작된 IMF 구제금융 체제는 전반적인 국내산업을 초긴축 환경으로 변모시켰다. 본지에서는 이런 환경 변화를 도약을 향한 기회로 활용하고자 'IMF와 데이터베이스'라는 주제로 좌담회를 마련했다. 정보사회의 근간이라 할 수 있는 정보(DB) 이용을 통해 위기를 어떻게 극복할 수 있는지 살펴봤다.

• Digital Contents
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• no.5 s.144
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• pp.96-97
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• 2005

올해로 52회째를 맞는 NCTA(National Cable & Telecommunications Association)의‘내셔널 쇼’가 미국 샌프란시스코 모스코니 센터(Moscone Center)에서 세계 각지에서 몰려든 참관자들로 북적거리는 가운데 지난 지난달 5일까지 3일 동안 개최됐다.

• Annual Conference of KIPS
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• 2013.05a
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• pp.722-725
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• 2013

최근 시퀀싱 기술의 발전으로 생물 데이터는 폭발적으로 증가되고 있으며 이로 인하여 우리는 지놈 시대를 지나 특정 환경 내에 존재하는 생물체들의 총체적인 지놈을 다루는 메타지놈 시대에 살고 있다. 그러나 메타지노믹 데이터의 증가속도에 비해 이를 효율적으로 분석, 검토, 판별할 수 있는 파이프라인 형태의 프로그램은 전무한 실정이다. 또한, 기존 프로그램은 대부분의 관련연구자들이 다루기 힘든 리눅스 환경의 커맨드 라인 방식이며 대용량 데이터를 처리할 수 없는 제한과 처리 속도의 한계성을 가지고 있다. 이러한 문제점들을 해결하고자 윈도우 환경의 직관적인 그래픽 사용자 인터페이스로 유기적인 데이터 분석이 가능한 메타지노믹 데이터 분석 파이프라인을 설계하고 구현하였다.