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380-nm Ultraviolet Light-Emitting Diodes with InGaN/AlGaN MQW Structure
배성범,김성복,김동철,남은수,임성묵,손정환,조이상 한국전자통신연구원 2013 ETRI Journal Vol.35 No.4
In this paper, we demonstrate the capabilities of 380-nm ultraviolet (UV) light-emitting diodes (LEDs) using metal organic chemical vapor deposition. The epi-structure of these LEDs consists of InGaN/AlGaN multiple quantum wells on a patterned sapphire substrate, and the devices are fabricated using a conventional LED process. The LEDs are packaged with a type of surface mount device with Al-metal. A UV LED can emit light at 383.3 nm, and its maximum output power is 118.4 mW at 350 mA.
배성범,이광형 崇實大學校 生産技術硏究所 2001 論文集 Vol.31 No.-
In recently, digital information, such as text, voice, image, is spreading rapidly in the world of the internet. It is easy to edit or store digital data through network. But, anyone could get a digital data as same as the original by copying. Illegal copy or distribution causes a serious problem of intellectual copyright infringement. To solve this problem, digital watermarking schemes have been studied by many researchers as copyright protection. This paper presents a watermarking algorithm in order to embed visually the recognizable pattern (such as Mark, Symbol, Stamping) into a image. We propose the effective watermarking method using the wavelet transform and PN code. The experimental results show that the proposed watermarking algorithm is superior to the other similar watermarking algorithm. We show that it is robust to common signal precessing and geometric transforms such as brightness, contrast, filtering, scaling and geometric deformations.
배성범(Seongbeom Bae),이병욱(Byung-Ook Lee),김영기(Youngki Kim),박상진(Sangjin Park) 한국중독정신의학회 2008 중독정신의학 Vol.12 No.2
알코올 의존 환자에 대한 기존의 국내 연구에서 사회인구 학적 변인이 치료 경과에 미치는 영향에 대한 보고가 거의 없었으나 본 연구에서는 결혼 상태가 재입원 즉 재발에 상당 한 영향을 주고 있어 단주 및 지속적인 외래 치료를 유지하는데 배우자의 역할이 중요함을 생각해 볼 수 있었다. 가장 주목할 만한 본 연구의 결과로는 입원 기간 중 절대적인 단주 프로그램의 수행 횟수 및 입원 기간에 비해 단주 프로그램에 얼마나 열심히 참여했는지가 향후 치료 경과에 중요함을 알 수 있었고 이는 제독 치료만을 마치고 퇴원을 원하는 환자들에게 단주 프로그램 참여를 권하는 데 있어 객관적인 근거로 사용될 수 있을 것으로 기대된다. 또한 동반된 신체 질환이 많을수록 재입원을 많이 하는 것으로 나타난 결과를 통해 임상 각 과와의 긴밀한 치료 협력 체계 구축을 통해 타 과적 처치가 끝난 후 단주 치료로 연계함으로써 단주 치료의 기회를 더욱 늘릴 수 있을 것으로 생각되었다. Objectives:The purpose of this study was to evaluate the effect of abstinence programs on the prognosis of alcoholic patients. Other factors that might also influence the prognosis of alcohol dependence were identified. Methods:A retrospective study was done by reviewing medical records of patients diagnosed as alcohol dependent between January 1, 2001 and December 31, 2005 at the National Health Insurance Medical Center, Ilsan Hospital, and data from the records of 207 patients who have been followed up on for more than 1 year were analyzed. The data included sociodemographic information. Results:Married patients were found to have a lower readmission rate com-pared to those who were single, divorced, bereaved, and separated, and those with alcoholic liver disease were more likely to relapse. Patients who had been re-admitted had statistically lower abstinence program participation numbers and participations (rates=participation number divided by admission day). Even in the re-admission group, the abstinence period was found to be longer in patients who had participated in more abstinence pro-grams during admission. Conclusion:Participation in inpatient abstinence programs was found to be a major factor of the patients’ prognosis. The role of spouses of alcoholic patients was also found to be important in preventing their re-admission.