• Korean Journal of Construction Engineering and Management
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• v.15 no.2
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• pp.3-11
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• 2014

As the recent construction projects have been carried out as a mixed-use complex project that includes architecture, civil, mechanical, electrical, and landscape, as well as become bigger and high-rise with the increased repetitive works, the TACT technique has received more attention as an effective method for achieving a target completion date by securing the continuous works. Although the TACT technique can maintain a steady flow without the interruption of works in order to utilize the resources of the repetitive works, it can not be considered as the systematic scheduling technique because the schedule computations are not possible as well as a critical path can not be recognized. This paper proposes the applicabilities of scheduling and monitoring the TACT schedule by the BDM technique as comparing and analyzing the methodologies for apartment finish works by the Excel, the Primavera(P6) based on the PDM technique, and the Beeliner based on the BDM technique that is a new networking technique, respectively.

• Journal of the Korean Society for Precision Engineering
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• v.2 no.2
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• pp.6-10
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• 1985

최근, 절삭가공 기술의 향상으로 공작기계의 자동화, 수치제어화가 되어 감에 따라 절삭가공 할때 생성되는 chip을 이용하게 처리할 수 있는 방법을 강구하는 것이 중요한 문제점으로 부각되고 있다. 절삭기계공장의 생산능률 및 합리화를 추진함에는 Chip의 원활한 처리법이 병행되지 않고는 단순히 공작기계의 개발, 개량만으로 해결되지 않는다고 본다. 절삭가공할 때 생성된 긴 chip이 공구와 공작물등에 감겨서 기물을 손상시킬 뿐만 아니라 Chip의 열로 인하여 공작물 또는 기계가 열변형을 받게 되는 경우가 있으므로 작업을 중지시켜서 작업원이 Chip 을 제거해야 할 번거러움 이 있다. 그러므로 chip 처리에 대한 연구보고는 Henriksen시대에서부터 시작하여 현재까지 많은 보고가 있다. 일반적으로 연속형 chip을 세단하는 방법으로는 불연속형 Chip법, 단속절삭법, 자동 절단촉진법 및 절단공구법으로 구분된다.

• Journal of Sensor Science and Technology
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• v.8 no.6
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• pp.469-475
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• 1999

The chips may be produced in the form of either broken chips or unbroken chips in turning process. The unbroken chips are dangerous to the operator and difficult to handle at high speed machining. The signal of Acoustic Emission is related to cutting conditions, tool materials, test conditions and tool geometry in turning. The relationship between AE signal and chip formation was experimentally investigated. The experimental results show that two types of chip formations are possible to classify from the statistical analysis of the amplitude of AE signal. The AE-sensor could be used to monitor the chip condition in turning.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.550-552
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• 2022

A video wall controller has a special type of multi-monitor that displays multiple monitors on a single large screen by arranging them consecutively. Operator maps and stores the video and monitor in advance. In a small system the mapping task of videos and monitors is simple. But as the number of monitors increases, the number of mapping cases increases, and thus work efficiency decreases. In this paper, we propose a association rule-based recommender system which help improve the efficiency of mapping task.

• Korean Journal of Construction Engineering and Management
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• v.2 no.3 s.7
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• pp.101-109
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• 2001

Application of system form is very effective to continuous horizontal or vertical walls of the apartment housing. Though the system forms that are used in the construction field have the advantage of concrete quality improvement and increasing number of usages, there are some problems in reaching early planning scheduling goal due to schedule delay and low productivity. This study is initiated to solve the problem and suggest some improvements searching for reasons that diminish the productivity. A case study was done in apartment construction field where system form was used and the productivity is analyzed by work sampling. Finally, productivity improvements for assembly of the form, internal form and external form are suggested, respectively.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.35 no.11
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• pp.1199-1204
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• 2011

The capability to bilaterally telemanipulate soft-tissues for medical applications could increase the quality of telemanipulation systems. Since most soft-tissue manipulation tasks include constrained motion interacting with an unknown and dynamic bioenvironment through contact, bilateral telemanipulation raises problems due to stability and transparency issues. It is well understood that knowledge of environments plays an important role in pursuing transparent telemanipulation and achieving telepresence, and in particular, online estimation of environmental parameters with an explicit environment model can improve these systems' performance. In this study, a continuum mechanics-based environment model with an online environmental property estimation algorithm and an adaptive telemanipulation control scheme is proposed. The proposed method can improve the telemanipulation performance in terms of stability and transparency and can offer valuable information (e.g., elastic modulus of soft tissues) pertaining to diagnostic examinations.

• Korean Journal of Construction Engineering and Management
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• v.4 no.4 s.16
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• pp.145-154
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• 2003

The change in environment of construction industry and the advancement of information technology require the improvement of construction project efficiency. However, construction industry still lacks performance-measuring tools that are the requirements of efficient project management system. In case of the schedule management system, schedule is usually being managed by result-oriented measurements such as completion time, spent cost, and progress rate, which are not good enough to control the overall continuity of work-flow. This research aimed to systemize the overall construction process and to develop the indicators for measuring performance of TACT activities during finishing work period that can contribute to the systemization of TACT management.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.126-134
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• 2003

The change in environment of construction industry and the advancement of information technology require the improvement of construction project efficiency. However, construction industry still lacks performance-measuring tools that are the requirements of efficient project management system. In case of the schedule management system, schedule is usually being managed by result-oriented measurements such as completion time, spent cost, and progress rate, which are not good enough to control the overall continuity of work-flow. This research aimed to systemize the overall construction process and to develop the indicators for measuring performance of TACT activities during finishing work period that can contribute to the systemization of TACT management.

• Journal of the Korean Society of Propulsion Engineers
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• v.4 no.2
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• pp.46-53
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• 2000

Hot forging of aluminum alloy has the bad machinability due to continuous chip formation caused from the ductility The bad machinability requires a labor and a high cost to produce final products after hot forging. In industrial field, T4 heat treatment is performed to improve the machinability, and the annealing and the cold sizing are followed. In this study, a series of heat treatments are introduced during hot forging operation without T4 heat treatment after forming so that it improves the machinability with reduction of the number of operations and machining cost. Instead of T4 heat treatment, water cooling and air cooling are tried and compared to find out an optimum cooling condition

• The Journal of the Korea Contents Association
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• v.11 no.3
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• pp.65-72
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• 2011

We stand at real world that some practical use method of gene information appears in succession by entrance on the stage of advanced techonlogy. As a lot of studies and development are achieved based on analysis of bio data, necessity of a tool that can help correct interpretation of data is required more and more in a lot of targets of bioinformatics to search new relation and information are established. In this paper, we are offered in existing I wish to offer user a more convenient study tool developing system that can supplement shortcomings of various tools for data analysis. So we've designed to offer in united environment that is not environment that is parted ORF driving out, bio information retrieval and work of similarity comparison lamp to work for bio data analysis and offers lacking consecutiveness in existing analysis system.