• Proceedings of the KSR Conference
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• 2004.06a
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• pp.1033-1040
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• 2004

Utilizing of the geotextile container shows several advantages such as standardized construction, factory manufactured products, the control of quality, workability. and economical point of view. Recently this technique can be applied to rehabilitate the loss of rail roadbed due to the heavy rainfall. In this study, a large-scale laboratory test were conducted with simulation of static performance on the geotextile container reinforced rail roadbed. Based on the laboratory test results, the vertical pressure distribution with respect to the depth, and settlement of rail roadbed were measured and compared test results between geotextile container reinforced case and unrein forced case. Thus, the effectiveness of reinforcement was evaluated in terms of its performance and stability.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.11a
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• pp.359-362
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• 2005

This study was performed to know the properties and estimation of field application of concrete(Bluecon) using fluosilicate salt based admixture made from by-product during phosphoric acid manufacturing process. Mix proportions for experiment were modulated at 0.45 of water-binder ratio and $0.5-2.0\%$ of adding ratio of fluosilicate salt based inorganic compound. Evaluation for Field application of concrete was carried out batch plant test at remicon factory and building construction. According to results. it was found that slump of concrete(Bluecon) using fluosilicate salt based admixture is higher about 10 to 20 mm than plain concrete, and air content is similar to each other. And the water permeability and crack of bluecon is lower than that of plain concrete.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05a
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• pp.146-149
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• 2006

In many previous studies, a prestressed concrete column has a larger flexural strength, shear strength and restoring force than a RC column. Recently, a precast prestressed concrete column is rising up a very rational column structure in that a economic aspect. In a precast prestressed concrete column, it makes in a factory. So, it needs a small construction site and acquires a higher durability than a cast in place concrete column. Seven precast concrete columns were tested under a constant axial load and a cyclically reversed horizontal load to investigate the performance. It is designed with a hollow section and consisted of 4 segments. The main variables of the test were a amount of prestressed, a type of joints and a boding type of strands. The test results show that the performance of a precast prestressed concrete column; failure mode, maximum load, energy dissipation and stiffness degradation.

• Proceedings of the Korean Geotechical Society Conference
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• 2004.03b
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• pp.897-903
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• 2004

Waste lime used in this study is producted as a by-product in the manufacturing process of making $Na_2CO_3$ from local chemical factory in Incheon. Currently about 320 millon tons of waste lime are accumulated and annually 100,000 tons are producted. Reuse of waste lime mixed with soil for banking and backfill materia in civil works was analysed in this study. This study was Carried out to investigate the geotechnical and environmental characteristics on field application. Field investigations were conducted on the road construction site in Incheon. This study presents the results of the engineering characteristics in field test and the leaching characteristic of waste lime in laboratory column tests. Countermeasure for reduction of environmental effects was suggested from the test results.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.463-464
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• 2010

Pre-tension Girder using Precast Concrete bed System have advantage of simplifying construction process, reducing prestress-loss and cost compared with post-tension Girder. That is because it is possible to produce pre-tension Girder by prefabricated concrete bed in site not factory. This paper present pre-tension girder method using precast concrete bed system and field application.

• Journal of the Korean Society for Precision Engineering
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• v.12 no.8
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• pp.131-139
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• 1995

In this study, small size stacker Crane for automatic ware house and interface circuit is designed and manufactured. IBM-PC is used as a controller. At 50kg$_{f}$ load, optimal motion velocity is 20 mm/min for X and Y axis and 12 mm/min for Z axis. Position fesolution is 0.005 mm and repeatability is .+-. 0.025 mm. Through characteristic experiment, effectiveness of the designed and manufactured stacker crane. PC control program, and design of interface circuit and construction of control system are shown. From these results, the developed stacker crane can be apply to FMS(Flexible Manufacturing System) and FA(Factory Automation) of industrial field.d.

• Journal of Korea Society of Industrial Information Systems
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• v.5 no.1
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• pp.53-60
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• 2000

In this paper, we developed a character recognition system which could be applied to the automation of construction assembling, and testing process of components by the recognition of characters on the components used in industry department. In this system the image information of each component was caught by the CCD camera and then characters on the images were recognized automatically. If we apply the system to the industrial field it will meet the various requirements such as high productivity, low cost and high qualify products and factory automation.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2000.11a
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• pp.214-218
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• 2000

This paper is a study if control system with KEN that is not only superior-manufacture ability-hardware; that is to say, the hardware is HMI/SACD solution and it has been developed to sub-station and power management system, which is easy, fast and suitable for users to work with, but also compatible solution with domestic environment Futhermore, the hardware has been developed by completely domestic technology with knowledge from various actual experiences. In the long run, for uninterruptible power supply to train, building, and factory, real time tele-supervisory control to power facilities.

• Explosives and Blasting
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• v.9 no.4
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• pp.13-21
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• 1991

This study is concerned with the disasters that occure in the field of industrial explosives and analyzed by two side the disaster of the manufacturing factory and that of the field, and is studied about the safety and the countermeasure. The industrial explosives accidents occure just accidentaly and unforeseeable, and reappearance experiments are more difficult. The 3E of J.H. Harvey was applied in this study to establish the counter measure of preventation of accidents, overcoming these restricted factores. As a method of technical safety countermeasures. The blasting vibration formula which had been conformed from the Seoul Subway Construction work during 1980-1984 year, was uilized, and, using the formula $V=Kw^{0.5}D^{-1.5}$ for the gneiss which is widely distributed in Pusan area, an index of the minimum and maximum amount of gun powder, to be used according to safety distance was made, and it helped the gun powder managing technician's practical business. During the fore work discharging, the safety distances of felling were theoretically established based on the writer ${\diagdown}s$ experiences of more than 10 years on this field.

• Journal of the KSME
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• v.35 no.4
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• pp.337-346
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• 1995

급변하는 기업 환경에 적절히 대응하여 기업의 궁극적인 목적인 이윤 추구의 극대화를 위해서는 단순한 노동생산성 향상, 국부적인 개선/합리화, 일부분의 전산화, 단위 공정의 자동화 등을 통한 부문별(기능별) 자동화로는 생산성 향상에 한계가 있을 것으로 여겨진다. 보다 체계적이고 종 합적으로 관련 업무를 추진하려면 진단 업무를 통하여 대상부문의 문제점들을 도출하여 그 문 제점들을 종합적으로 해결하는 차원에서 일관성 있게 추진하여야 될 것이다. 이러한 진단 활동을 통하여 체계적이고 효율적인 생산 시스템을 구축하려면 관련된 모든 부문의 현상 파악 및 문 제점 도출에 직접적으로 지원을 할 수 있는 핵심 요원으로 구성된 전담 추진 팀을 구성함은 물 론이고 전문 기관 또는 학계와 공동으로 추진하는 것이 효율적일 것으로 여겨진다. 현대중공업 에서는 이러한 요구에 적절히 대응하기 위하여 엔진사업본부의 POPICS와 플랜트 사업본부의 PINES가 학계와 공동연구로 추진 중에 있다. 이러한 일련의 TFT 활동을 통해 좋은 결실을 얻기 위해서는 참여하는 핵심 요원은 물론이고 해당되는 부문의 모든 임직원의 Mind 형성 및 적극적인 참여가 절실히 요구된다. 또한, 이와 같은 사업본부 단위의 대형 과제를 추진하려면 시스템화 지향이 우선 전제되어야 하기 때문에 부분적인 최적화 노력보다는 전체적인 접근이 필요할 것이다.