• The Research Journal of the Costume Culture
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• v.22 no.2
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• pp.326-338
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• 2014

This study is to examine the satisfaction of protective clothing for riot policewomen. The protective clothing that riot policewomen currently wear are not suitable for them because they are structurally designed for men. A survey was conducted about satisfaction of protective clothing for 190 riot policewomen who work in Seoul and Gyeonggi province. This study focused on functionality and comfort of the protective clothing. It examined overall condition of protective clothing and policewomen's satisfaction in terms of safety, activity, fitness, comfort, convenience and design. The first three aspects were examine to measure its functionality and the last three to measure its comfort. Most results show under 3 out of 5 point in terms of functions and comfort level. In conclusion, it is strongly recommended that new design which fits better to women according to their body structures and sizes as well as new fabric materials that permeability better are needed.

• Journal of Biosystems Engineering
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• v.13 no.3
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• pp.71-80
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• 1988

• Computational Structural Engineering
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• v.25 no.3
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• pp.7-12
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• 2012

• International Journal of Internet, Broadcasting and Communication
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• v.12 no.3
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• pp.74-86
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• 2020

This study discussesresearch and development of large-sized 3D printers that can be applied to construction and civil engineering for various designs of protective casing on foam liner for concrete exteriors. The consistent use of concrete represents the current surroundings. However, concrete exteriors in Korea have not considered the regional characteristics, but the concrete has been poured solely for economical aspects for the last decade or two. There are many cases of poor installation and not enough design development projects to correct it. This study was conducted to apply various patterns, regional characteristics, and 3D printing for protective casing design for foam liner to create various designs for the concrete walls. Therefore, we started researching on a large 3D printer, and designed and developed this system. Considering the chronological process, the properties of concrete structures were identified, the application of designs for concrete in Korea and abroad and the 3D printing materials for the protective casing were surveyed and analyzed, and a stereotype was produced in the first year to study designs for the beauty of concrete surfaces. In the second year, images of regional characteristics were gathered, design ideas for regional promotion were derived, virtual images were produced along with design modeling to simulate the appearances, and verify the effect of application and promotion. Finally, in the third year, the 3D printer for concrete foam liner was constantly improved to analyze the 3D printing program and the various library elements to complete an actual large-sized 3D printer.

• Journal of Institute of Convergence Technology
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• v.2 no.2
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• pp.25-29
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• 2012

Micro machining technologies have been required to satisfy various conditions in a high-technology industry. Micro electrochemical process is one of the most precision machining methods. Micro electrochemical process has been divided into electrochemical etching through protective layer and electrochemical machining using ultrashort voltage pulses. Micro shaft can be fabricated by electrochemical etching. The various protective layers such as photo-resist, oxide layer and oxidized recast layer have been used to protect metal surface during electrochemical etching. Micro patterning on metal surface can be machined by electrochemical etching through protective layer. Micro hole, groove and structures can be easily machined by electrochemical machining using ultrashort voltage pulses. Recently, the groove with subnanometer was machined using AFM.

• Proceedings of the Korea Concrete Institute Conference
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• 1997.04a
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• pp.203-209
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• 1997

An experimental study to evaluate to evaluate corrosion protection systems was undertaken with 44 reinforced concrete slab specimens subjected to cyclic wet and dry saltwater exposure. Corrosion measurements included monitoring macrocell corrosion currents, which are genrerally accecpted in United States practice. Test results indicate that specimens containing 2 kg/$\textrm{m}^3$ of NaCl and exposed to wet(outdoor) and dry(indoor) conditions but not to saltwater show very low values of corrosion measurements regardless applying any corrosion protective systems. Corrosion currents of the specimens exposed at 10 percent of NaCl were higher than that of the specimen exposed at 5 percent of NaCl, so the density of the salt water had an influential effect on the test. For the specimens with water repellent membrane currents kept relatively low numerical values, but test specimens with surface corrosion inhibitor protective system showed high values of corrosion current. It would be expected that evaluation of the corrosion protective systems need long-term measurement.

• Journal of Ocean Engineering and Technology
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• v.31 no.3
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• pp.233-240
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• 2017

Subsea structures are always vulnerable to accidental risks induced by fishing gear, dropped objects, etc. This paper presents the design of a subsea manifold protective structure that protects against dropped object impacts. Probable dropped object scenarios were established considering the shapes and masses of the dropped objects. A design layout for the manifold protective structure was proposed, with detailed scantlings and material specifications. A method applicable to the pipelines specified in DNV-RP-F107(DNV, 2010) was applied to calculate the annual probabilities of dropped objects hitting the subsea manifold. Nonlinear finite element analyses provided the structural consequences due to the dropped object impacts such as the maximum deflections of the protective structure and the local fracture occurrences. A user-subroutine to implement the three-dimensional fracture strain surface was used to determine whether local fractures occur. The proposed protective structure was shown to withstand the dropped object impact loads in terms of the maximum deflections, even though local fractures could induce accelerated corrosion.

• Journal of the Korea Institute of Military Science and Technology
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• v.16 no.5
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• pp.683-689
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• 2013

Defending society against rapidly evolving types of warfare, such as asymmetric warfare, will remain a challenge, at least through the first half of the 21st century. Technology will continue to play a major role in these efforts, and society must develop appropriate innovative theoretical, numerical, and experimental approaches that will lead to a wide range of solutions. This paper is aimed at highlighting challenges that must be overcome to achieve the required objectives.

• Computational Structural Engineering
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• v.25 no.3
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• pp.13-20
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• 2012

• Magazine of the Korea Concrete Institute
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• v.23 no.2
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• pp.16-22
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• 2011