• Transactions of Materials Processing
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• v.21 no.8
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• pp.467-472
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• 2012

Shaving shear-welding is a solid-state welding process, which utilizes plastic deformation of surplus material. The solid-state nature of this process contributes to high integrity and strength of the weld. The objective of this study was to investigate the effects of process variables on the material flow patterns and identify the process condition for obtaining the best weld. FEM simulations were carried out along with experimental characterizations. The results showed the importance of the cutter angles and the overlap lengths, and helped attain the optimum shaving shear-welding die and the best process condition.

• Journal of Korean Association for Spatial Structures
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• v.5 no.2 s.16
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• pp.7-15
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• 2005

Currently, the structural material, namely glass fiber reinforced polymer (GFRP) is focused on innovative structure due to lightness, excellent workability and noncorrosive characteristics, etc. However, the lack of GFRP connection technology produces only an imitation of steel and wood structures. This uses univentive design principles as well as unsuitable material applications, causes tons of surplus of materials to be wasted, and results in uneconomical structures, because the characteristics between steel and GFRP are completely different. Thus, this research develops the new, innovative GFRP connection system with considerations of the characteristics of GFRP and adopts it to a mobile und modular membrane pavilion.

• Proceedings of the Korean Geotechical Society Conference
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• 2005.10a
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• pp.395-404
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• 2005

This study is to evaluate the physical and mechanical characteristics of flowable backfill and search for the optimal mixture contents of it used for constructing underground power utilities. flowable backfill is known as soil-cement slurry, void fill, and controlled low-strength material(CLSM). The benefits of CLSM include reduced equipment costs, faster construction, re-excavation in the future, and the ability to place material in confined spaces such as narrow parts nearly impossible for compaction or perimeter of underground power cables. The flowable slurry mixture made with 9 types of soil and 6 types of accelerated mixtures in the laboratory were evaluated for bleeding, flowability, heat resistance, and unconfined compressive strength to meet the aim values of this study.

• Journal of Digital Convergence
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• v.13 no.11
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• pp.267-276
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• 2015

This study divided hospital management performance as surplus and deficit, Liquidity, Growth, Turnover Ratios, Productivity, Operating Expense, Patient Care Performance and evaluate the relationship between profitability. In addition to providing a useful basis for seeking profitability and effective management measures based on the findings of the hospital has its purpose. The study period was 2013 to identify the hospital's financial performance as evaluation criteria, were selected for a total of 147 hospitals surveyed. In conclusion, the more profitable medical and hospital financial performance, results showed a higher rate. In addition to the factors affecting the profitability of the Salaries, Administrative Expenses, Material Costs was a major factor. To to enhance the future profitability of hospital care it is also important to increase revenue, but Salaries, the cost reduction-effective strategy for reducing Administrative Expenses may be required.

• Journal of the Korean GEO-environmental Society
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• v.11 no.10
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• pp.15-24
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• 2010

In the case of underground power utilities pipe such as circular pipe, the most difficult problem is low compaction efficiency of the bottom of pipe inducing the failure of utilities. To overcome this problem, various studies have been performed and one of these is CLSM(Controlled Low Strength Materials) accelerated flow ability. But underground power utilities pipe backfill materials is also needed to have good thermal property that can dissipate the heat as rapidly as it is generated. So, in this study, we performed thermal resistancy test for various materials such as sand, weathered soil, clay and mixed soil to analyze the thermal characteristics of CLSM(Controlled Low Strength Materials) with accelerated flow ability for various conditions(water content, unit weight, void ratio, curing time) and to evaluate the applicability for backfill material of underground power utilities pipe. The test results of 16 specimens for thermal resistancy test showed good thermal property that maintained below $85^{\circ}C\;cm/W$.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.3-3
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• 2010

We investigated the influence of the indium content on the threshold voltage ($V_{th}$) shift of sol-gel-derived indium-gallium-zinc oxide (IGZO) thin film transistors (TFTs). Surplus indium composition ratio into IGZO decreases the value of $V_{th}$ of IGZO TFTs showed huge $V_{th}$ shift in the negative direction. $V_{th}$ shift decreases from 10 to -28.2V as Indium composition ratio is increased. Because the free electron density is increased according to variation of the Indium composition ratio.

• 한국생물공학회:학술대회논문집
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• 2005.04a
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• pp.317-321
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• 2005

L- arabinose residues are widely distributed in plant cell walls, where they are present in polymers such as arabinans, arabinoxylans, arabinogalactans and arabinogalactan proteins. L-arabinose suppress intestinal sucrase and decrease the adsorption of sugar in the small intestine, consequently, weight loss and fatness prevent. Now, xylose be used replacement sugar and arabinose be utilized fatness prevent of our time. Various Agricultural surplus like com fiber, contain $20\;{\sim}\;40%$ of hemicellulose. Corn fiber from Agricultural Renewable Biomass was chosen the best suitable material for arabinose production. In this work, we searched about for L-arabinose gene in compost, metagenome pool and indonesian soil. So, the B1029 TS2-8 of L-arabinase gene in compost was selected by YNB media(5% yeast nitrogen base, 5% arabinogalactan). After enzyme reaction with corn fiver, B1029 TS2-8 produced 2.15 g/L of L-arabonose.

• Applied Chemistry for Engineering
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• v.20 no.4
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• pp.363-369
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• 2009

High oil price and biodiesel expansion lead the surplus of glycerol in the market. Glycerol has been used as a raw material itself at petroleum chemistry, paint, tobacco, household products and cosmetics in the conventional market. Recently, many research to find new applications of glycerol as a low-cost feedstock for functional derivatives have led to the introduction of a number of selective processes for converting glycerol into commercially value-added products. The recent studies on the development of new value-added glycerol derivatives will be reviewed.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.138-139
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• 2021

The MiDF Cement Composite is a high-performance construction material with low defects that dehydrates surplus water through pressurization and minimizes air gap between particles. In other words, the performance expression of the MiDF cement complex is affected by pressurized conditions. Thus, this study analyzed the physical characteristics of MiDF cement complex according to the power and pressure of the ga-power and the time of application and intends to use it as a basic data for optimal mixing.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.5C
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• pp.303-312
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• 2006

This study is to evaluate the mechanical characteristics of flowable backfill and offer a guide line of mixture proportion based on soil types for constructing underground power utilities. Flowable backfill is known as soil-cement slurry, void fill, and controlled low-strength material(CLSM). The benefits of CLSM are reduced equipment costs, faster construction, re-excavation in the future, and the ability to place materials in confined spaces, which are narrow parts or perimeters of underground power cables nearly impossible for compaction. The flowable slurry mixed with 17 soils and 6 accelerated mixtures in the laboratory were evaluated for flowability and unconfined compressive strength to meet the target values of this study.