• Journal of Korea Multimedia Society
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• v.7 no.1
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• pp.113-125
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• 2004

Active networks aim to provide a software framework that enables active network applications to customize the processing their communications. Active security component architecture focuses on the support of reuse system by active security component. The architecture is standard layer to acquire, understand, and assemble component, and it has to support a guideline for component identification, search and customization. In this paper we present the active security architecture as a standard model of discrete active network solution, and we propose the method for component classification and specification.

• 보존과학연구
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• s.30
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• pp.5-19
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• 2009

This study is about the conservation treatment from 2008 through 2009 of Gilt-Bronze Cap excavated from Andong tumulus at Guildu-ri, Podumyeon, Goheung, Jeonnan. The whole shape of Gilt-Bronze Cap was distorted and destroyed by the earth pressure. For the conservation treatment, first, soil and pollutants came from the findspot were removed. And then to assemble the whole shape of Gilt-Bronze Cap, we carried out the jointing work forming the shape after dismantling. Under that process, the rust of bronze was removed through the microscope at every moment and the gold-plated surface was revealed. Now the conservation treatment was completed and it is expected to perform the scientific research on the manufacturing methods and composition analysis of Gilt-Bronze Cap.

• Journal of the military operations research society of Korea
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• v.22 no.2
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• pp.113-125
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• 1996

'Bowl Phenomenon' refers to allocating the work loads to middle stages slightly less than the outer ones in a series production system. Millier and Boling(1966) first discovered that the output rate of a production line were obtained by deliberately unbalancing, like a bowl-shape, under certain circumstances. So far quite a many researches have been studied either theory-oriented or simulation-oriented on this topic. However the papers concerning assemble production line are rather rare possibly due to the system complexity. In this paper, a simulation work on a 6-node assembly line has been conducted with the help of SLAMSYSTEM software. The simulation results have been turned out that 1) the Bowl phenemenon is still valid in the given system, 2) buffer storage between the work stations are critical measure for determining the degree of work-load unbalancing.

• Journal of the Korean Applied Science and Technology
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• v.20 no.4
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• pp.296-308
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• 2003

The capacity and long life of gel electrolyte batteries is connected with gas recombination producting $PbO_2$ and Pb electrode. We were prepared with phosphoric acid gel electrolyte to know gel characteristics per density to assemble VRLA batteries. We studied by measuring electrolyte dispersion using Brewster-angle microscope(BAM), charge-discharge cycle and electrode structure using scanning election microscope(SEM) per electrolyte density. As a results, phosphoric acid density 1.210 was excellent gel dispersion in sol condition, electrode condition after fifty cycles in this study.

• Journal of the Korean Society for Precision Engineering
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• v.27 no.12
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• pp.75-83
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• 2010

Every mechanical part for mass production has dimensions with tolerances in engineering drawing. Tolerance is given to guarantee assemble parts together satisfying functional requirements and dimensional constraints. Tolerance is essential factor for standardization of parts or assembly and has huge influence on manufacturing cost. It will be desirable to have tolerances as broad as possible for minimizing manufacturing cost. This paper describes tolerance analysis of u-joint assembly that is a part of automobile steering system. Within the range of tolerances of parts, accumulated effect is estimated by arithmetic calculation, probability theory and Monte carlo simulation. Each result is compared to investigate the method for increasing productivity.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2011.10a
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• pp.446-451
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• 2011

External vibration occurred during vehicle's movement can affect performance of communication equipment and reliability of internal critical components of it. Therefore, through environmental testing, verification is performed prior to system test in order to prevent these problems. In this study, anti-vibration design is applied to compensate for the failure in certain frequencies during environmental test. Through the dynamic analysis according to the changes of mount configuration, optimization of the mount assemble structure was performed.

• Proceedings of the Korean Society of Laser Processing Conference
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• 2002.05a
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• pp.25-27
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• 2002

Most of automotive companies make use of spot welding in order to assemble car body. Even though spot welding has been developed for last 60 years, there were some limitations in upgrading production line. Laser welding has advantages In productivity and degree of freedom in design. Thanks to fast speed, we can reduce body assembly line by 80%. Also with non-contact & one-side approach, it is possible to design various car body structures. New project launched the laser welding technology in mass production has started in 1999. In this paper, a new type of cur named 'next generation vehicle (NGV)' is introduced. The car body of NGV is welded with 4㎾ Nd: YAG laser.

• Journal of the Korea Safety Management & Science
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• v.18 no.2
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• pp.109-118
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• 2016

IPS(Ideal Production System) is a strategic cost management establishing ideal target cost, innovating cost structure and reduction. However, IPS was commonly used in assembly industry acquiring components and using them to assemble vehicles etc. Applying IPS to steel industry is a new try and not easy because cost elements in flow manufacturing are clustered and obfuscated in a complicated way. This paper proposes ICM (Ideal Cost Management) method adaptive to steel industry. One of the biggest advantages is that ICM could classify and categorize costs in detail according to accounts and manufacturing machines. Based on ICM information, steps of extracting and maximizing ideas are followed effectively. From 2013, ICM was applied successfully to POSCO Pohang Steel Works 38 factories.

• Proceedings of the KWS Conference
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• 2007.11a
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• pp.53-56
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• 2007

Magnesium sheet used in electrical device due to mobility and EMF shielding characteristics. Magnesium case by press forming was advantageous compare with conventional die casting process, because of its thin gauge of wall and surface quality. But it need to makes the boss to fix inner part or assemble the case. CD stud welding was effective way for joining the boss to the thin gauge case of the electrical devices. In this study, we investigated the performances of the magnesium boss welder To measure the process parameters such as the force and the weld current, we design the monitoring system for CD stud welding. We test the characteristics of CD stud welding for AZ31 sheets at some variables. Finally we select the optimum welding range of magnesium sheets in CD stud welding process.

• Design & Manufacturing
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• v.10 no.1
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• pp.1-6
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• 2016

In this study, the modification structure design of insulation displacement connector developed was considered for simplification of assembly process. The modified connector consisted terminal, wafer and fitting nails. The separation behavior under locking condition for pitch 1.25mm wire to board connector was measured and the apparatus for the test was made. The maximum restraining force was measured about 4.5kgf that was bigger value than the specification limit. And the pulling force of a wire was also indicated about 2.3kgf.