Cholesteric Liquid Crystal-Polymer Composite Systems for Display Applications

유창재 한국고분자학회 2013 한국고분자학회 학술대회 연구논문 초록집 Vol.2013 No.4

가시오가피 투여가 혈중 전해질농도에 미치는 영향

유창재,박정순 신라대학교 자연과학연구소 2000 自然科學論文集 Vol.8 No.-

The purpose of this study was to investigate the effect of Acanthopanax teas(by Sang-ill medicine manufacture) on the concentration of electrolyte. The subjects employed were 4 male students who are majoring in physical education and 3 female students who are majoring in dance. Acanthopanax teas were orally administered 3 package/day for 1 month. The results of this study were as follows. 1.There were significant increase in Ca concentration at static state, immediately after the maximal exercise, 5 and 10 min of recovery period, as well. 2.There were no significant differences in Cl concentration at static state, immediately after the maximal exercise, 5 and 10 min of recovery period. 3.In static state, K concentration was increased by Acanthopanax teas but there were no significant differences at immediately after the maximal exercise, at 5 and 10 min of recovery period, as well. 4.There were no significant differences in Mg concentration at static state, immediately after the maximal exercise, 5 and 10 min of recovery period. 5.There were no significant differences in Na concentration at static state, immediately after the maximal exercise, 5 and 10 min of recovety period.

한국·미국·스페인 청소년의 태권도 수련이 인성교육에 미치는 영향

유창재,양정옥,이중숙,이상돈,김영수,조만태 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.6

The purpose of this study was to analyzed what effect Taekwondo training has upon Juvenile trainees in Korea, America, and Spain. to see if there is a significant difference in their Human nature Education. The subject of this study was set up as 547 Juvenile trainees who are including 183 Koreans, 185 Americans and 179 Spanish people belonging to gymnasia in their own countries, and sampling by purpose sampling. The means in this study is used to amend and complemented after confirming suitability of the contents in the questionnaire that is made on the basis of questionnaire Lee Chul Ho(1996). it is used as study means after modified, whether the substance of question is right in fitness and applicability or not, Reliability of the question, the range of Cronbach's a is showed from .7924 to .8450. The method of statistically analysis adapted one-way ANOVA, two-way ANOVA by using SPSS WIN 10.0 Program. The result of this study are as followed : First, it can be seen that American Juvenile and Spanish Juvenile show more significant change than Korean Juvenile in their Human nature Education by the Taekwondo training according to their nationality. Second, it can be seen that Juvenile who have had the Taekwondo training for more than from three to five year show more significant change in their emotion, sociability and attitude towards life than those who have had the same training for more than other period in their Human nature Education according to their Taekwondo training period. Third, as a result of analytic investigation of what effect the same training has upon the change factors in their Human nature Education in accordance with their training period and nationality, it can be seen that the training itself and nationality has the greater influence on them than the training period. Therefore, judging from the above findings, it can be proved that the Taekwondo training has much more significant and positive effect on Juvenile in their change of emotion, sociability and attitude towards life.

Introduction to Optics for Liquid Crystals

유창재 한국공업화학회 2010 한국공업화학회 연구논문 초록집 Vol.2010 No.-

Disciplinary Sport Physiology Health Education , Sport Medicine : 청각자극이 유산소운동 측정변인에 미친 효과에 관한 연구

유창재,강재형,양정옥,이중숙 ( Chang Jae Yoo,Jae Hyung Kang,Jeong Ok Yang,Joong Sook Lee ) 한국체육학회 1996 국제스포츠과학 학술대회 Vol.1996 No.2

PFM/PWM 듀얼 모드 피드백 기반 LED BLU 구동용 LLC 공진 변환 제어 IC 설계

유창재,김홍진,박영준,이강윤,Yoo, Chang-Jae,Kim, Hong-Jin,Park, Young-Jun,Lee, Kang-Yoon 한국전기전자학회 2013 전기전자학회논문지 Vol.17 No.3

본 논문은 Pulse Frequency Modulation(PFM)/Pulse Width Modulation(PWM) 듀얼 모드 피드백 기반 LED 백라이트 유닛 구동용 LLC 공진 변환 제어 IC 설계에 대한 내용을 제시한다. 공진형 변환기에서 하나의 변압기를 사용하면서, 두 가지 출력 전압을 생성할 수 있는 구조를 제안하였으며, Master 출력은 PFM 방식으로 Slave 출력은 PWM 방식으로 제어하도록 설계 하였다. 2차 측 Master 출력을 제어하기 위해서 파워 스위치 제어 신호의 주파수를 조절하는 PFM 피드백과 2차 측 Slave 출력을 제어하기 위해서 파워 스위치 제어 신호의 펄스 폭을 조절하는 PWM 피드백 회로를 설계하였다. 설계된 IC는 $0.35{\mu}m$ 2 Poly 3 Metal BCD(Bipolar-CMOS-DMOS) 공정을 이용하여 레이아웃 되었으며, 면적은 $2.3mm{\times}2.2mm$ 이다. 또한, 설계한 칩은 5 V 공급 전압으로부터 26 mA의 전류를 소모하였다. This paper presents a design of LLC resonant converter IC for LED backlight unit based on PFM/PWM dual-mode feedback. Dual output LLC resonant architecture with a single inductor is proposed, where the master output is controlled by the PFM and slave output is controlled by the PWM. To regulate the master output PFM is used as feedback to control the frequency of the power switch. On the other hand, PWM feedback is used to control the pulse width of the power switch and to regulate the slave output. This chip is fabricated in 0.35um 2P3M BC(Bipolar-CMOS-DMOS) Process and the die area is $2.3mm{\times}2.2mm$. Current consumptions is 26mA from 5V supply.

한우 번색우의 사양관리에 대한 수태율 향상

유창재 慶北大學校 農業開發大學院 1999 最高農業經營者課程 論文集 Vol.5 No.-

體力要素間 相關에 關한 硏究(Ⅲ)

兪昌在 新羅大學校 1985 論文集 Vol.18 No.-

The purpose of this study is to investigate the relationship among six factors of physical fitness. The objects of this study are fifty girls in physical education department of B women's university in B city. The results of this study are described as follows: 1. In agility and endurance among physical fitness factors, there is a little relation between squat thrust and heeling pull ups, and close relationship between side step and heeling pull ups, but no relationship with other test items. 2. In power and endurance among physical fitness factors, there is a close relationship between vertical jump and sit ups, and a little relation between vertical jump and heeling pull ups. 3. In power and strength among physical fitness factors, there is a little relation between vertical jump and back lift, and a little relation between vertical jump and leg strength. 4. There is no relationship between other test items in each physical fitness factors.

Optical anisotropy of aligned pentacene molecules on a rubbed polymer corresponding to the electrical anisotropy

유창재,배진혁,금창민,이신두 한국물리학회 2010 Current Applied Physics Vol.10 No.1

We report on the optical anisotropy of a pentacene film on a rubbed (poly)vinylalcohol (PVA) layer related to the electrical performances of the pentacene organic field effect transistors (OFETs) depending on the direction of a current flow. The optical anisotropies of the PVA films are negligible with respect to whether or not rubbing process. In the pentacene OFET on the rubbed PVA layer, however, the optical anisotropy is observed and the anisotropy of the electrical performances directly corresponds to the optical anisotropy of the pentacene thin-film on the rubbed PVA layer.

운동강도와 생리주기의 변화가 혈액성분농도에 미치는 영향에 관한 연구

유창재 新羅大學校 1992 論文集 Vol.34 No.1

This paper was attempted to clarify the change pattern of concentration in blood components by the change in menstrual phase, and the response during gradual exercise load. The subjects selected for the experiment were six trained female students and six untrained female. All the subjeets had regular menstrual phase and all were in good health. They performed the maximal exercise on treadmill. Blood collecting was made at the static state, at the time of 40%VO₂max, and all-out time in each menstrual phase. The results are as follows. 1) The level of T-protein concnetration between two groups in three menstrual phase did not appear significantly. At exercise intensities, the level of all-out time was highest and in the 40%VO₂max the level was lowest. 2) Athletic growp's Albumin concentration was slightly higher than nonathletic group's. The level of follicular phase was highe than any other menstrual phase. There was no significant difference among three exercise intersities. 3) The level of Cholesterol concentration was no significant in two groups, in three menstrual phases and three exercise intensities. 4) RBC count was slightly greater in the athletie group than in the nonathletic group. But there were no Significant difference among three menstrual phase and among exercise intensities respectively. 5) WBC count was Slightly greater in the monathletie group than in the athletic group at rest and level exercise phase throughout all menstrual phase. Among exercise intersities. WBC count was greatest in all-out time. 6) Hb concentration was slightly higher in athletic group than in nonathletic group at static state and it was alike in all exercise intensities throughout all menstrual phase. The value was slightly high in the all-out time among three exercise intensities. No significant difference was shown among three menstrual phases. 7) The level of Hct concentration was higher in the athletic group than in the nonathletic group at static state and exercise. Thicker density was seen at all-out time among three exercise intensities.