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許聖雨,申成植 東亞大學校 附設 情報通信硏究所 1995 情報通信硏究所論文誌 Vol.3 No.1
본 연구에서는 분리된 두 직교 다각형을 결합하여 분리되기 전의 직교 다각형을 복원하는 효율적인 알고리즘을 제안한다. 직교 다각형의 복원을 위해서는 일치되는 체인을 찾아야 되는데 이를 효율적으로 찾을 수 있는 알고리즘을 제시한다. 분리된 직교 다각형을 분리 형태에 따라 분류하였고, 분류에 따른 체인간의 성질을 규명하였으며, 그 성질들을 이용하여 알고리즘의 효율을 높일 수 있음을 보였다. 제안한 알고리즘은 크게 세 단계로 처리되는데 첫째 단계에서는 체인의 양 끝에 있는 꼭지점들의 상대 좌표를 이용하여 일치될 수 없는 체인을 제거하였고, 둘째 단계에서는 체인 간의 성질을 이용하여 또한 일치될 수 없는 것들을 제거하였으며, 마지막 단계에서는 남아 있는 체인들에 대해 수정된 문자열 검색 알고리즘을 이용하여 일치성 여부를 결정한다. 알고리즘의 수행 시간은 최악의 경우 O(n²)이나, 실험 결과에 의하면 평균 수행 시간이 O(n)이 됨을 볼 수 있었다.
Tacrolimus를 근간으로 한 면역억제제를 복용하는 장이식 환자에서 이식 후 새로 발생한 당뇨병의 위험인자
허우성 ( Woo Seong Huh ),최유경 ( Yu Kyong Choi ),김예지 ( Ye Jee Kim ),최남경 ( Nam Kyong Choi ),김민영 ( Min Young Kim ),백나나 ( Na Na Baek ),염지연 ( Ji Youn Youm ),이정은 ( Jung Eun Lee ),김대중 ( Dae Joong Kim ),김윤구 ( Yoo 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.6
Purpose: This study was conducted to identify risk factors for new onset diabetes after transplantation (NODAT) among renal transplant recipients treated with tacrolimus-based immunosuppressant. Methods: We selected renal transplant recipients who underwent surgery at Samsung Seoul Hospital between May 2001 and July 2009. Exclusion criteria were as follows: recipients <18 years old, history of diabetes mellitus (DM) or impaired glucose tolerance. Analysis of possible risk factors for NODAT included age, gender, body mass index, co-morbid diseases, family history of DM, infection of hepatitis B or polyomavirus, type of donors (cadaver or living) and acute rejection. Overall incidence and median value of NODAT onset day were analyzed with Kaplan-Meier curve. We calculated crude incidence rate and relative risk (RR) and 95% confidence interval (CI) for independent risk factors of NODAT using Cox proportional hazard analysis. Results: A total of 278 patients were included and the incidence of NODAT was 13.3% (5.6/100 person-year) and the median duration of NODAT onset was 28 days. In Cox analysis, risk factors for NODAT were age (45-59 years: RR=1.41, 95% CI 1.09-1.83, 60> years: RR=4.36, 95% CI 2.00-9.49), family history of DM (RR=1.62, 95% CI 1.12-2.34) and polyomavirus infection (RR=1.40, 95% CI 1.08-1.81). Conclusion: The risk factors for NODAT among renal transplant recipients treated with tacrolimus- based regimen were age (>45 years old), family history of DM and polyomavirus infection.
Highly transparent Pt ohmic contact to InGaN / GaN blue light - emitting diodes
Huh, Chul,Kim, Hyun-Soo,Kim, Sang-Woo,Lee, Ji-Myon,Kim, Dong-Joon,Kim, Hyun-Min,Park, Seong-Ju The Korean Vacuum Society 2000 Journal of Korean Vacuum Science & Technology Vol.4 No.3
We reprot on the fabrication and characterization of InGaN/GaN multiple quantum well light-emitting diode (LED) with a highly transparent Pt ohmic contact as a current spreading layer. The value of light transmittance of a Pt thin film with a thickness of 8 nm on-GaN was measured to be 85% at 450 nm. The peak wavelength and the full-width at half-maximum (FWHM) of the emission spectrum of the LED at 20 mA were 453 nm and 23 nm, respectively. Pt-contacted LEDs show good electrical properties and high light-output efficiency compared to Ni/Au-contacted ones. These results suggest that a Pt thin film can be used as an effective current spreading layer with high light-transparency.
고혈압성 피각출혈 환자에서 신경학적 상태의 변화에 따른 치료의 결과 분석
허필우,박영섭,정동섭,이길송,최승진,박춘근,이상원,최창락 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.2
One hundred and twenty four patients with hypertensive putaminal hemorrhage were analyzed by time course. All patients were brought to the emergency room within 3 hours after the ictus. Seventy three patients were conservatively treated and 51 patients operatively. The neurologic condition of each patient was evaluated by means of the Glasgow coma scale(GCS) score every 1 hour. CT scan of the brain of these patients were taken within 6 hours after the ictus. Clinical severity of the putaminal hemorrhage was graded as rapid deterioration, slow deterioration, and non deterioration by the CT and neurological status. A precise time course analysis of putaminal hemorrhage were compared with the conservative group and surgical group in a 7 hospital day period. Outcome was assessed 6 months later based on the degree of functional recovery(DOFR). The overall mortality was 16.1% and surgical mortality was 13.7%. Surgical treatment for the rapidly deteriorating patients appears to be beneficial when compared with the slowly deteriorating patients. Outcome of the non deteriorating patients didn't show any differences in the quality of life regardless of treatment modality.