• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.293-294
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• 2021

For the successful introduction of the construction automation system, it is necessary to define the consideration factors and target tasks for the necessity of automating the conventional methods. In this study, the factors for automation were derived through brainstorming and questionnaires, and calculated the relative importance through the pairwise comparison using the AHP analysis method. In addition, the detailed type of concrete work was classified into 32 detailed works, and the automation score for each work was calculated by investigating the factors considering the necessity of automation. As a result of the automation score analysis, it was concluded that the need for automation of concrete placing work was the highest. Based on this study, we will consider the strategy of a concrete construction automation system.

• 한국안전학회지
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• 제35권4호
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• pp.1-8
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• 2020

Intensity of accidents associated with dangerous machines and devices are (hereafter items), in general, high compared to other industrial accidents. This study focuses on cause analysis of accidents associated with items that are subject to safety certification. The method is based on automated analysis of abstracts of accidents written in descriptive format. The analysis results indicate that more than 50% of accidents associated with items are caused by technical reasons and nearly 50% of accidents were preventable. More effective prevention of industrial accidents would then be realized by safety certification at the stage of danger generation. Transition from the direct regulation on users to manufacturers is also needed to improve the effectiveness and efficiency of industrial safety system in Korea.

• 한국컴퓨터정보학회논문지
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• 제12권1호
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• pp.127-135
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• 2007

인터넷의 광범위한 보급에 따라 컴퓨터를 이용한 불법적인 범죄가 증가하고 있고, 이러한 범죄를 막기 위한 정보보호 기술자체가 국가의 경쟁력이 되어 가고 있다. 본 논문에서는 퍼지 논리를 네트워크 침입탐지시스템에 적용하여 보안 전문가와 유사한 결과를 얻을 수 있는 자동화된 퍼지 논리기반의 침입탐지시스템을 제안한다. 프로토콜의 유사성과 시간적인 연속성을 통한 세션화된 패킷분류방식을 통한 퍼지 규칙을 본 시스템에 적용함으로서 다양하고 다변적인 공격패턴으로부터 신속한 침입 판정을 내릴 수 있다. 또한, 대용량의 네트워크 트래픽을 처리해야하는 현재의 네트워크 환경에서, 퍼지추론을 통한 자동화된 트래픽의 프로토콜별/세션별 분석결과를 보여 줌으로써 보안전문가들의 분석 시간과 비용을 절감할 수 있는 장점을 제공한다.

• 한국환경과학회지
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• 제23권3호
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• pp.493-502
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• 2014

EnergyPlus is a whole building energy simulation program that engineers, architects, and researchers use to model energy and water use in buildings. Modeling the performance of a building with EnergyPlus enables building professionals to optimize the building design to use less energy and water. This program provides energy analysis of building and needs weather data for simulation. Weather data is available for over 2,000 locations in a file format that can be read by EnergyPlus. However, only five locations are avaliable in Korea. This study intends to use AWS data for having high spatial resolution to simulate building energy. The result of this study shows the possibility of using AWS data for energy simulation of building.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권3호
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• pp.1119-1143
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• 2014

Lightweight trust mechanism with lightweight cryptographic primitives has emerged as an important mechanism in resource constraint wireless sensor based mobile devices. In this work, outlier detection in lightweight Mobile Ad-hoc NETworks (MANETs) is extended to create the space of reliable trust cycle with anomaly detection mechanism and minimum energy losses [1]. Further, system is tested against outliers through detection ratios and anomaly scores before incorporating virtual programmable nodes to increase the efficiency. Security in proposed system is verified through ProVerif automated toolkit and mathematical analysis shows that it is strong against bad mouthing and on-off attacks. Performance of proposed technique is analyzed over different MANET routing protocols with variations in number of nodes and it is observed that system provide good amount of throughput with maximum of 20% increase in delay on increase of maximum of 100 nodes. System is reflecting good amount of scalability, optimization of resources and security. Lightweight modeling and policy analysis with lightweight cryptographic primitives shows that the intruders can be detection in few milliseconds without any conflicts in access rights.

• 시스템엔지니어링학술지
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• 제1권1호
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• pp.14-19
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• 2005

High temperature vacuum furnaces or high standard electric furnaces demand high technology level and high production cost. Therefore, an iterative design process and the optimization approach under integrated computing environment are required to reduce the development risk. Moreover, it also required to develop an integrated design software that can manage the centralized database system between factory and design department, and the automated furnace design and analysis. The developed software is dedicated to the development of the vacuum (electric) furnaces. Based on the distribute middleware system, the GUI module, the CAD module, the thermal analysis module and the optimization module are integrated. For the DBMS, Microsoft Access is employed, the GUI is developed using Visual Basic language, and AutoCAD is utilized for the configuration design. By investigating the analysis code interface, the analysis and optimization process, and the data communication method, the overall system architecture, the method to integrate the optimizer and ana lysis codes, and the method to manage the data flow are proposed and verified through the optimal furnace design.

• 대한화장품학회지
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• 제30권4호
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• pp.549-553
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• 2004

화장품중의 미생물을 검출하는데 소요되는 시간을 $48{\~}72{\;}h$에서 24 h 이내로 단축하고자 하는 목적으로 자동화 방법으로서 ATP bioluminescence 시스템과 impedance 시스템에 대한 비교 평가를 수행하였다. 인위적으로 저농도의 미생물로 오염시킨 에멀전 제형에 대하여 표준 한천 평판 배지법과 ATP bioluminescence 방법 및 impedance 측정 방법으로 분석을 실시한 결과에서 모두 유의한 검출 결과를 나타내었으며, 실제 적용 실험 결과에서도 각각 $95\%$ 이상의 좋은 상관관계를 나타내었다. 오염균으로는 표준 균주로서 Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli와 사내 현장 검출 균주인 Ralstonia mannitolilytica를 사용하였다. 본 검증 결과에 따라 화장품의 미생물 품질 관리 방법으로 ATP bioluminescence 방법 또는 impedance 측정 방법을 활용한 자동화 장비의 사용을 통해 신속한 품질 판정이 가능하게 되었다.

• Journal of Microbiology and Biotechnology
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• 제9권6호
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• pp.744-750
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• 1999

Forty alcohol yeast strains were isolated from the main mashes (10 strains from each mash) for brewing of 4 different kinds of Korean traditional liquor (3 different types of Yakju and 1 Takju). Thirty-eight out of 40 strains were identified to be the same strain, Saccharomyces boulardii, by the Automated Bacteria, Yeast, and Fungi Identification System (Biolog Co., U.S.A.) based on the metabolic fingerprints. One strain that showed the highest ethanol production among the 38 strains in YPD medium, designated SHY 111, was selected and used for differentiating from other yeast type strains using the polymerase chain reaction (PCR). Amplified DNA, from transcribed internal spacers of SHY 111 chromosomal DNA, was found to be the same in both size and sequence as those of S. cerevisiae KCCM 11215 (formerly S. coreanus) and S. boulardii along with that of S. cerevisiae AB 972, which was used as a type strain for the yeast genome project. However, when PCR was carried out with the intron splice site primer, it resulted in the amplification of the SHY 111-specific DNA fragment which was about 200 bp in size. When PCR was carried out using the primer to test diversity of 40 isolated yeast strains, it was found that the PCR patterns were similar to each other except for the 200 bp bands derived from all the 10 strains from one Yakju, and 2 strains from another Yakju. These results suggest the strain identified as S. boulardii by the Automated Identification System to be a dominant strain for the fermentation of Korean traditional liquors.

• 품질경영학회지
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• 제30권3호
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• pp.111-119
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• 2002

Gears are essential elements for mechanical power transmission. Geometric precision is the main factor for characterizing gear grade and qualify. Gear pitch is one of the crucial measurements, which is defined as a distance between two adjacent gear teeth. It is well-known that variability in gear pitches may causes wear-out and vibration noise. Therefore maintaining pitch errors at a low level plays a key role in assuring the gear quality to customers. This paper is concerned with a case study, which presents a computerized system for Inspecting pitch errors in a gear machining process. This system consists of a PC and window-based programs. Although the start and stop is manually accomplished, the process of measuring and analyzing pitch data is automatically conducted in this system. Our purpose lies in reducing inspection cost and time as well as Increasing test reliability. Its operation is briefly illustrated by example. Sometimes a strong autocorrelation is observed from pitch data. We also discuss a process monitoring scheme taking account of autocorrelations.

• 한국CDE학회논문집
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• 제2권2호
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• pp.85-92
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• 1997

An axial flow fan design system has been made by integrating the self-developed programs and I-DEAS. By using the system, an axial flow fan was designed, manufactured and verified through the wind tunnel experiments in coorperation with a refrigerator appliance division. It has been shown that the optimal design without the ambiguity of the design parameters can be possible by the three-dimensional flow simulations using a self-developed CID code, FANS-3D. (Flow Analysis code using Navier Stokes aguations in Three-Dimensional curvilinear coordinates). By virtue of the fluency of the data flow, an optimally designed fan which satisfies design conditions can be selected in a short time and less cost. The manufacturing processes of a Mock-up and an injection molding die have been automated through the self-made interface programs which connnect from the start to the end. It has been shown that the newly developed fan by this system has a superior performance characteristics to an existing fan.