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Ga_(2-x)Sb_(x)Se₃단결정 광전소자 제작에 관한 연구
김형곤,송찬일 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2
Ga_(2-x)Sb_(x)Se₃solid solution crystals were grown by the Bridgman technique. The grown Ga_(2-x)Sb_(x)Se₃single crystals showed excellent photosensitivity from the visible to the near infrared range. The crystal structures of the Ga_(2-x)Sb_(x)Se₃single crystals were found o be cubic for the composition X=0.0, to be tetragonal for X=0.2 t o X=0.8, to be tetragonal and orthorhombic together for X=l0, and to be orthorhombic for X=1.2 to X=2.0, respectively. The optical energy gaps and the photoconductivity peak energies of the Ga_(2-x)Sb_(x)Se₃single crystals have a constant value in composition range from X=0.2 to X=0.8 with tetragonal structure, and an another constant value in composition range from X= 1.2 to X=2.0 with orthorhombic structure. The photoconductivity spectra of Ga_(2-x)Sb_(x)Se₃single crystals showed the photoconductivity peaks at the range corresponding to the band edge for each of the single crystals.
김형곤,김곤홍,김동헌,김민찬,김병식,김영우,김용일,김용호,김욱,김원우,김진조,김태봉,류성엽,Kim, H.H.,Kim, K.H.,Kim, D.H.,Kim, M.C.,Kim, B.S.,Kim, Y.W.,Kim, Y.I.,Kim, Y.H.,Kim, W.,Kim, W.W.,Kim, J.J.,Kim, T.B.,Ryu, S.Y. 대한위암학회 2005 대한위암학회지 Vol.5 No.4
대한복강경위장관연구회가 2004년 전국에서 시행된 복강경 위 수술의 현황을 조사하였다. 모두 36개의 기관으로부터 38명의 외과의가 설문에 응답하였다. 2004년 한 해 동안 시행된 복강경 위 수술은 총 1,089예였고 1995년부터 2004년까지 시행된 복강경 위 수술을 누적하면 모두 2,386예였다. 2004년에 위선암 환자에서 시행된 복강경 위 수술은 2003년보다 약 2배 많은 754예였다. 위선암에 대한 근치적 위절제술인 복강경보조위아전절제술 및 복강경보조위전절제술은 2001년도를 전환점으로 급속히 증가하였다(2001년 55예, 2002년 150예, 2003년 364예, 2004년 738예). 특히 복강경보조위전절제술은 작년에 폭발적 인 증가를 보였다. (2003년 20예, 2004년 112예). 그러나 복강경보조유문부보존위절제술 및 복강경보조근위부위절제술과 같은 복강경보조기능보존위절제술은 작년 각각 1예씩 시행되어 아직 보편화되지 않았다. 위 점막하종양에 시행된 복강경위쐐기절제술은 142예였다. Hand-assisted laparoscopic surgery는 2001년 39예, 2002년 55예, 2003년 49예가 시행되었으나 2004년에는 단 5예만 시행되어 급격한 감소를 보였다. 고도비만수술은 2003년도에 시작되어 2004년에는 49예로 증가하였다. 위선 암에서 복강경위수술의 적응증에 대한 견해로서 19명이 조기위암에서 시행한다고 하였고 7명은 적응증을 T2N0까지 넓히고 있었다. 앞으로 보험문제가 해결이 되고 장기 성적이 나온다면 위선암에 대한 복강경 위 수술은 널리 보편화될 것이다. The Korean laparoscopic Gastrointestinal Surgery Study Group made a survey of laparoscopic gastric surgeries which were performed in Korea during 2004. Thirty-eight surgeons from 36 Institutions responded to the questionnaires. One thousand eighty-nine laparoscopic gastric operations were performed during 2004. The cumulative number from 1995 to 2004 was about 2,386. Seven hundred fifty-four operations for a gastric adenocarcinoma were performed during 2004 which is almost two times the number performed during 2003. Laparoscopic radical procedures, such as a laparoscopy-assisted distal gastrectomy or total gastrectomy (LADG and LATG) have increased rapidly since 2001 (55 cases in 2001, 150 cases in 2002, 364 cases in 2003 and 738 cases in 2004). Especially, laparoscopic total gastrectomies were explosively adopted last year (20 cases in 2003 and 112 cases in 2004). However, laparoscopic function-preserving gastrectomies, which included one laparoscopy-assisted pylorus-preserving gastrectomy and laparoscopy-assisted proximal gastrectomy, are rarely performed at this time. One hundred forty-two wedge resections for a gastric submucosal tumor were performed during 2004. Hand-assisted laparoscopic surgery (HALS) was performed in 39 cases in 2001, 55 in 2002, and 49 in 2003; however, only 5 such surgeries were performed during 2004. In 2003, laparoscopic bariatric surgery began, and during 2004, 49 operations were performed. In terms of indications of laparoscopic gastric surgery for adenocarcinoma, 19 surgeons performed a LADG only for a T1 lesion, and 7 surgeons extended their indications to T2N0 lesions. In the near future, laparoscopic procedures for gastric cancer will be widely adopted in Korea if the medical-insurance obstacle is overcome, and the long-term survival results are verified.
상습 지체구간 선정을 위한 Percentile 속도의 활용
김형곤,이기영,이숭봉,장명순 한국도로학회 2014 한국도로학회논문집 Vol.16 No.5
PURPOSES: The objective of this study is to find Percentile Speed( ) for Appraisal of Road Section with Recurring Congestion. METHODS : Percentile Speed( ) is determined by correlation analysis of CSI that proposed existing literature. and CSI(ConsistencyService Index) is a index that subtract service fail frequency from 100 points, and service fail is defined as traffic situation is driving less than80kph speed. In this study, We analyzed the highest correlation percentile speed associated with CSI. This speed is chosen as a delay decisionspeed. In order to verifying reliability, it performed a comparison with the previous method. RESULTS : As a result, 30 percentile speed( ) was decided as index speed for judgement of recurring congestion section, and throughcomparison with existing methods, we demonstrated that 30 percentile speed can be useful for judgement of recurring congestion section. CONCLUSIONS: This method to Determine recurring congestion section using the percentile speed( ) was proposed for the first time inthis paper. This method can be applicated more quickly and easily than existing method for determining of recurring delay section .