• 한국해양공학회지
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• 제23권3호
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• pp.30-34
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• 2009

Oil hydraulic piston pumps are being extensively used in the world, because of simple design, light weight and effective cost etc. An oil hydraulic pump is likely to have serious problems of high leakage, friction and low energy efficiency according to large time use. In the oil hydraulic piston pumps the clearance between the valve block and piston plays an important role for volumetric and overall efficiency. In this paper, the wear property of the SACM645 material used the hydraulic piston pump has been work out by experimentation with variable heat treatment. To investigate the effect according to the piston surface condition, seven different types specimen were prepared. From the wear test results, induction hardening and nitration were definitely superior to the others. On the whole, nitration was estimated for high strength material to wear resistance.

• 한국운동역학회지
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• 제22권2호
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• pp.237-242
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• 2012

The purpose of this study was (a) to develop carbon nanotube-based shock absorbers for reducing potentially harmful impact forces and excessive foot pronation, and (b) to briefly determine how the effects of carbon nanotube-based shock absorbers on biomechanical variance during drop landing. A university student(age: 24.0 yrs, height: 176.2 cm, weight: 679.5 N) who has no musculoskeletal disorder was recruited as the subject. Hardness, specific gravity, tensile strength, elongation, 100% modulus, tear strength, split tear strength, compression set, resilience, vertical GRF, and loading rate were determined for each material. For each dependent variable, a descriptive statistics was used for different conditions. The property test results showed that tensile strength, tear strength, split tear strength, compression set, and resilience in carbon nanotube-based shock absorbers were greater than general Ethylene Vinyl Acetate(EVA). These indicated that resistance against variable strength in developed carbon nanotube-based shock absorbers were greater than general EVA. In vertical GRF of CNTC was less than those of EVA during drop landing and loading rate of CNTC was greater than EVA. It seems that the use of CNT can be a effective way of reducing and controlling shock from impact.

• 한국안전학회지
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• 제19권2호
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• pp.41-46
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• 2004

The formation of rust on metallic substrate is known to cause the damages and destructions of raw materials, which is one of the leading reasons of sturctural collapses and many kind of hazards in modern industry. Polymer gels with rust removing effects were compounded in this study by employing various kinds of acids like hydrochloric acid, phosphoric acid, gluconic acid, oxalic acid as the rust removing ingredients. TEA(Triethanolamine) as dispersant and hydrophilic chemical were used for effective gelation of acids. Also corrosion inhibitor was added to enable the coating effect and to improve rust removing effect on metallic surface. In order to investigate the rust properites on metallic substrate, artificial rusts were prepared in salt solution, using iron, copper, aluminium and brass as the base metals. The properties of gel compounds were checked by gelation, pH, viscosity, morphology property and rust removing test. Developed gel compounds in this study have a good rust removing property, showing a strong adhesion on horizontal and vertical metallic surface, and can be easily rinsed off by water.

• 한국의류학회지
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• 제33권10호
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• pp.1655-1664
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• 2009

Chitosan is an environment-friendly and natural cationic polymer that can be used as a hair cosmetic additive. Healthy hair and damaged hair samples were experimented on according to treatment conditions using a water-soluble chitosan. Chitosan treated hair samples were studied on the physical and mechanical property changes. It is most effective when the water-soluble chitosan treatment was adjusted to the Neutral (pH6.8) or Acid (pH4.5). When the water soluble chitosan was treated at pH4.5, the tensile strength, tensile elongation, and elasticity of decolorized hair all increased. The virgin and damaged hair both changed into elastic and soft hair. The effect of chitosan treatment is more noticeable in the healthy hair than in the damaged hair.

• 한국실내디자인학회논문집
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• 제16권2호
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• pp.40-50
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• 2007

This study started from my concern over maintenance and renewal of existing buildings and other seriously damaged Modern Architecture under the urban development. Above all, we must face up to reality of an increasing need of renovation of old buildings that are in its physical, social, and economical decrepitude. Currently, 25% of total buildings come under renovation period within 20 years, which means that we do not have enough time to decide the destiny of old buildings. In the city, there has been endless controversy over conversation and development. Recently the Cultural property Registration System made it possible a positive usage of non-designated cultural property with historical value. This very useful system renewed our perception on Modern Architecture as cultural property and also triggered peoples' interest in recreating new value beyond economical one. So we really need a balanced view that can bring into both growth of contemporary city and renewal use of Modern Architecture. Here, in this study I tried to solve that problem with Conversion Design and define what a realistic design way for them is. To get more reasonable result, I chose a factor analysis for 20 conversion projects in Japanese Modern Architecture. Conversion Design is a proper way to restore the identity of old buildings and the most effective way to sustainable use of Modern Architecture.

• 한국컴퓨터산업학회논문지
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• 제3권9호
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• pp.1287-1294
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• 2002

본 논문에서는 DWT기반의 점진적 영상부호화를 위한 알고리즘 기법을 제안해보고자 한다. DWT와 에지부분을 추출하고 확장된 EZW 알고리즘을 이용하여 기존의 Embedded Coding 보다 효과적인 부호화 방법을 설계해 보았다. 일반적으로 에지 부분은 원 영상을 복원하는데 있어 매우 중요한 역할을 하게 된다. 영상에 대해 DWT를 거치게 되면 계수들은 중요계수와 비중요계수 두가지의 그룹으로 분류할 수 있다. 본 논문에서는 에지부분이 영상에서는 중요계수처럼 나타난다는 것을 이용하였다. 특히 DWT 영상에서는 방향성에 의해서 고주파 부대역에서 이러한 특성이 그대로 나타난다는 것을 확인할 수 있다. 또한 Embedded Coding에서 중요계수처럼 영상을 복원하는데 중요한 정보들은 전송순서에서 보다 우선순위를 가지게 된다. 따라서 본 논문에서 제안하려는 시스템은 영상의 점진적 전송이 요구되는 응용분야에 효과적으로 이용될 수 있을것으로 기대할 수 있을 것이다.

• 한국중재학회지:중재연구
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• 제11권1호
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• pp.121-143
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• 2001

Arbitration agreement is an agreement by the parties to submit to arbitration all or certain disputes which have arisen or which may arise between them in respect of defined legal relationship, whether contractual or not. Arbitration has become increasingly popular in settling international and domestic commercial disputes nowadays. The importance of arbitration agreement cannot be overemphasized. It is the most reasonable way to settle commercial disputes. There are two types in arbitration agreement. one is arbitration clause, the other is submission agreement. The arbitration agreement must be made in writing, in addition, other communication instruments shall be considered as effective arbitration agreement if they are properly documented. Over the past few decades, a considerable number of studies have been conducted on the legal property of arbitration agreement in Germany and Japan. Its legal property is aspect of substantial law contract. The basis of arbitration agreement is the principle of party autonomy. The important effect of arbitration agreement is to preclude jurisdiction from national court. The respondent shall raise a plea not later than when submitting his first defense on the merits of the action. As positive effect of arbitration agreement, the court must support the conduct of arbitral proceedings and arbitrator can be appointed upon request of a party.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 추계학술대회 논문집 Vol.17
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• pp.65-68
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• 2004

A lot of R&D efforts are being concentrated on the development of high performance HTS coated conductors(CC). Unlike the HTS Bi-2223 tape, a variety of processes have been tried to fabricate CC tapes. PLD and MOD are believed to be very effective methods, and high critical currents of long length CC tape have been reported. In this study, we prepared two kinds of YBCO CCs to evaluate electromagnetic property. One is YBCO tape deposited on IBAD template by PLD and the other is AMSC's MOD CC tape Critical current (Ic) in magnetic fields, its angular dependency, and n-value were measured and analyzed. Magnetic field property of Ic was appeared to be different due the fabrication process. MOD tape showed higher in-field property, n-value of both PLD and MOD tapes exponentially decreased with magnetic field. MOD tape showed higher n-value in whole magnetic fields.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.269-269
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• 2017

Germination is one of the techniques used to enhance the texture properties and nutritional value of the brown rice (BR). Therefore, germinated BR (GBR) has received significant attention during the last decade. Physicochemical and cooking properties of brown rice were examined before and after germination. Germination raised the cooking properties, such as water absorption, expanded volume and soluble solid of cooked BR (brown rice). The texture, measured using tensipresser, was significantly improved by germination. The hardness of cooked BR was decreased by germination, but the GBR was sticker. In RVA, all viscosity value (peak viscosity, break down, set back, and final viscosity) of germinated rice flour was also reduced while gelatinization temperature did not change. Amylose content and amylopectin chain length distribution of BR starch were slightly changed by germination. Overall results revealed that germination was an effective tool to improve texture and cooking properties of BR.

• 한국의류산업학회지
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• 제8권6호
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• pp.702-708
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• 2006

The purpose of this study was to investigate the dyeing-property and antibacterial activity on nylon fabric dyed with cochineal at variable dyeing conditions. Al, Cr, Fe, Cu and Sn were used as mordants and adsorption was compared with different mordanting methods. The maximum UV-visible absorption band of cochineal extract was 495 nm. The dyeability on nylon fabric was good because of having a amine group. The optimum dyeing conditions of nylon fabrics are dyeing concentration 1.5%(o.w.s), dyeing temperature $60^{\circ}C$, pH 3 and dyeing time 30 minutes. The pre-mordanting method is preferred for Al and Cr, and the post-mordanting one is preferred for Cu, Sn and Fe to achieve better dyeing. The optimum mordanting conditions of wool fabrics dyed with cochineal are mordanting concentration of 0.5%(o.w.s), mordanting temperature $60^{\circ}C$, and dyeing time 30 minutes. Nylon fabrics dyed with cochineal show a little antibacterial activity, but it was increased by Sn mordanting. MIC test results in antibacterial activities revealed that the antibacterial activity of Cu was the highest among mordants, but Sn mordant was the most effective in antibacterial activities after mordanting treatment of nylon fabric. The fastness properties of dyed nylon fabric showd a little worse or a similar level and there was no significant difference between a mordanted and non-mordanted fabric.