• Fashion & Textile Research Journal
• /
• v.7 no.6
• /
• pp.641-649
• /
• 2005

This study is to make pH 9 reduction by adding NaOH to 1, 3, 5, 7, 9, 11% solution of thioglycollic acid, cysteine, cysteamin, to add it on helically winded natural hair and colored hair and leave them for 20, 40, 60 minutes, to add $NaBrO_3$ oxidant for 15 minutes and to compare and analyze the wave form. This study showed the results of permanent using thioglycollic acid, cysteine, cysteamin. In the permanent wave form according to the kind of reductant, concentration, and processing time, there were a little difference between thioglycollic acid and cysteine. But cysteamine not only showed apparent difference but also formed strong and elastic wave. The permanent wave is affected by the diagonosis of hair, the choice of permanent solution and the processing time. Therefore the scientific diagonosis of hair is to be considered first of all. By choosing the kind of solution, the concentration and the processing time according to the results of hair diagonosis and wave form, we can prevent the lengthening and damage of hair.

• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.91_92
• /
• 2009

As the increasing integrity of VLSI, the BIST(Built-In Self Test) is used as an effective method to test chips. Generally the pseudo-random test pattern generation is used for BIST. But it requires too many test patterns when there exist random resistant faults. Therefore we propose a mixed test scheme which applies to the circuit under test, a deterministic test sequence followed by a pseudo-random one. This scheme allows the maximum fault coverage detection to be achieved, furthermore the silicon area overhead of the mixed hardware generator can be reduced.

• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.1322_1323
• /
• 2009

The $V_{1.85}W_{0.15}O_5$ thin films deposited on Pt/Ti/$SiO_2$/Si substrates by RF sputtering method exhibited fairly good TCR and dielectric properties. It was found that film crystallinity, dielectric properties, and TCR properties were strongly dependent upon the annealing temperature. The dielectric constants of the $V_{1.85}W_{0.15}O_5$ thin films annealed at $400^{\circ}C$ were 38.11, with a dielectric loss of 1%, respectively. Also, the TCR values of the $V_{1.85}W_{0.15}O_5$ thin films annealed at $400^{\circ}C$ were about -3.45%/K.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2002.11b
• /
• pp.74-79
• /
• 2002

The piping verification tests were performed in order to verify the structural integrity during initial operation of the reactor coolant systems and the primary heat transportation systems of nuclear power plants by KEPRI in Korea. The tests were conducted at full operating temperature and pressure. The objective is to evaluate the possibility of excessive load generating on piping, piping supports, and reactor structures etc. in the steady normal operation and expected pump transient conditions. As a result, the measured vibrations have been shown acceptable level according to ASME/ANSI OMa-Standard, Part 3.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.22 no.2
• /
• pp.31-35
• /
• 1986

A bore is a transition between different uniform flows of water. If a long wave of elevation travels in shallow water it steepens and forms a bore. The bore is undular if the change in surface elevation of the wave is less than 0.28 of the original depth of water. This paper describes the growth of an undular bore from a long wave which forms a gentle transition between a uniform flow and still water. A physical account of its development is followed by the results of numerical calculations. Finite-difference approximations are used in the partial differential equations of motion. For undular bores, numerical calculations show that (i) the relationship between relative elevation and relative velocity given by long wave theory is approached for an undular bore, (ii) the amplitude of first crest of an undular bore approaches a finite limit approximately at an exponential rate, and (iii) the distance between the first two crests increases without bound, approximately logarithmically.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.27 no.6
• /
• pp.82-87
• /
• 2013

Electrical leakage happens when faults in electrical apparatus or power lines occur. It causes electrical fires and electric shocks. In order to reduce accidents caused by electrical leakage current, it is important to detect faults effectively and shut off the power. In this paper, firstly we analyzed statistics of electrical fires and electric shocks caused by electrical leakage current. Secondly, standards of allowable leakage current and body impedance models were analyzed. Lastly, effective application methods for breaking electrical leakage current were suggested. The results will provide useful preventive measures of electrical fires and electric shocks caused by electrical leakage.

• Journal of the Korean Graphic Arts Communication Society
• /
• v.22 no.1
• /
• pp.83-94
• /
• 2004

PSR ink is used to insulation coating material that heat resistance is. The use purpose is used for bridge prevention, circuit protection, stabilization of insulation. Heat-cured resin was used mainly on the materials of PSR inks. But, UV-curing type resin in used. Also, because of recently environmental problem, ink is going to water type. Purpose of this study is to develop PSR ink that can develop in pure water. and experiment did that do from that find suitable oligomer and monomer and does brand ratio differ. Specially Knew that is extent water soluble UV resin develop possible is DPHA 10~50% that A/A1924 is 50~90wt %, monomer. As a result, when ratio of A/A1924 and DPHA low viscosity epoxy resin is 5:1.5:1.5, could get high sensibility pattern repeatability, tack and alkali-resistance.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2011.07a
• /
• pp.359-360
• /
• 2011

본 논문에서는 고속으로 디지털 홀로그램을 생성할 수 있는 하드웨어구조를 제안하였다. 수정된 컴퓨터 생성 홀로그램(computer-generated hologram, CGH) 알고리즘을 이용하고, 전체 화소에서 홀로그램의 한 화소씩 연산하는 방법을 선택하여 홀로그램 한 화소씩 계산하고 바로 출력 하여 메모리 병목현상을 제거하기 위한 파이프라인 기반의 하드웨어 구조를 제안하였다. CGH 알고리즘을 바탕으로 입력부, 연산부, 및 정규화부로 구성된 디지털 홀로그램 생성기의 구조를 제안하였고, 객체의 화소만 저장하여 반복 사용하기 때문에 메모리의 사용량을 줄일 수 있었다. 제안한 하드웨어는 세로 방향으로 확장을 하여 동작을 병렬화시킬 수 있다. 제안한 하드웨어는 1K의 광원에 대해 HD급 홀로그램을 초당 약 87장을 생성할 수 있었다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2011.07a
• /
• pp.385-386
• /
• 2011

본 논문에서 제안하는 알고리즘은 홀로그램의 생성 및 획득 방식에 따라서 해상도 스케일러블 코딩 방식과 광원 기반의 SNR 스케일러블 코딩 방식으로 구성된다. $1,024{\times}1,024$ 크기의 홀로그램에 대해서 홀로그램 기반의 해상도 스케일러블 코딩은 1:1에서 100:1의 압축율을 가지면서 여러 단계의 적응적인 서비스가 가능하도록 하였다. 광원 기반의 SNR 스케일러블 코딩은 1:1에서 100:1의 압축율을 가지면서 여러 단계의 서비스가 가능하도록 하였다.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2007.08b
• /
• pp.1789-1791
• /
• 2007

We fabricated OTFT-OLED display panel by using Ag-paste for source and drains electrode of OTFTs. The OTFTs were fabricated by solution processes such as spin-coating for PVP gate dielectric and screen printing for S/D electrodes with Ag-paste, except pentacene active layer which was deposited by evaporation. The mobility was 0.024 cm2/V.sec , off state current ${\sim}10-11A$, threshold voltage 7.6 V and on/off current ratio ${\sim}105$. The panel consisted of 16 x 16 pixels and each pixel consisted of 2 OTFTs, 1 Capacitor and 1 OLED. The pixels successfully worked in terms of current magnitude supplied to OLED and the control ability of driving and switching OTFTs.