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Dual-Channel LED 백라이트를 위한 새로운 전류평형 구동회로에 관한 연구
김희승(Hee-Seung Kim),조상호(Sang-Ho Cho),이상현(Sang-Hyun Lee),한상규(Sang-Kyoo Han),노정욱(Chung-Wook Roh),홍성수(Sung-Soo Hong),이효범(Hyo-Bum Lee) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
본 논문에서는 최근 조명 및 디스플레이용으로 주목받고 있는 LED(Light Emitting Diode) 백라이트를 위한 새로운 전류평형 구동회로를 제안한다. 제안 회로는 Dual-channel LED를 정전류로 제어하기 위해 한 개의 Balancing capacitor가 적용된 구조로서, Dual-channel LED에 별도의 DC/DC 컨버터가 각각 적용된 기존 회로에 비해 구조가 간단하고, 원가 절감 및 효율 개선 등의 장점을 얻을 수 있다. 본 논문의 타당성 검증을 위해 제안 회로의 동작 원리 및 이론적 해석을 제시하였고, 최종적으로 제안 회로를 55” LCD TV 백라이트에 적용한 그 실험 결과를 통해 그 우수성을 검증한다.
제2형 남자 당뇨병환자에서 비만과 비비만에 따른 아디포넥틴의 혈중 농도와 다중결합체의 차이
장상아 ( Sang Ah Chang ),손호영 ( Ho Young Son ),이정민 ( Jung Min Lee ),손태서 ( Tae Seo Sohn ),권혁상 ( Hyuk Sang Kwon ),손현식 ( Hyun Shik Son ),윤건호 ( Kun Ho Yoon ),김희승 ( Hee Seung Kim ),차봉연 ( Bong Yun Cha ),이광우 ( K 대한당뇨병학회 2007 Diabetes and Metabolism Journal Vol.31 No.3
김성경(Kim, Seong Kyong),김희승(Kim, Hee Seung),정성수(Chung, Sung Soo) 대한근관절건강학회 2017 근관절건강학회지 Vol.24 No.1
Purpose: The purposes of this study were to identify degrees of low back pain, knowledge of and educational needs for low back pain of patients with chronic low back pain and to investigate their relationships. Methods: Data were collected from questionnaires distributed to 83 patients with chronic low back pain at a hospital. Results: The low back pain score was 4.70±2.22 out of 10. The degree of low back pain was a statistically significant difference according to gender, smoking, radiating pain and frequency and duration, daily life disturbance degree, sleep disturbance and depression. The knowledge score was 8.29 out of 13. The knowledge was a statistically significant difference according to smoking and degree of sleep disturbance. The educational needs score was 39.83 out of 50. The educational needs was a statistically significant difference according to age, duration of disease, radiating pain, standing time, depression, pain treatment experience, and treatment institutions. As the low back pain increased, the educational needs increased (r=.254, p=.021). There were no correlations between low back pain and knowledge (r=-.040, p=.720) and knowledge and educational needs (r=.061, p=.581). Conclusion: It is important to focus on items with statistically significant differences in pain, knowledge, and educational needs, and to select low knowledge and high educational needs items to develop a systematic education plan.