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요추추간판 탈출증의 자기공명영상: 탈출 방향과 신경근 및 경막낭의 압박소견과의 관계
차병훈 대한영상의학회 1996 대한영상의학회지 Vol.34 No.4
Purpose : To evaluate the relationship between the direction of herniated disc and pressure effect on nerve root and dural sac, as seen on MRI. Materials and Methods : We retrospectively reviewed lumbar spine MR images of122 cases of lumbar disk herniation in 75 patients MRI findings were analyzed with regard to the relationship between the direction of the herniated disc and pressure effect on nerve root and dural sac. pressure effect on nerve root and dural sac was arbitralily divided into three types. Type I was defined as zero or minimal compression of nerve roots or thecal sac by the herniated disc ; type II was defined as mild to moderate compression, while III was defined as severe compression or displacement of nerve roots and/or thecal sac. Results : Of the 122 cases seen in these 75 patients, 97(80%) were observed at L4-5 and L5-S1. The central type(71cases ; 58%) was more frequently observed than the posterolateral type(48cases ; 40%) or lateral type(3cases ; 2%). The totals of types I, II, and III were 44(36%), 43(35%), and 35 cases(29%), repectively. Seventy-seven %(34/44) of type I and 65%(28/43) of type II were of the central type but for type III, the corresponding figure was only 26%(9/35). Conclusions : On MR imaging, most of lumbar disk herniations were observed at L4-5 and L5-S1, with a predominance of the central type rather than the posterolateral one. Most of the central types were either type I or type II.
차병훈,김남천 서울보건대학 1999 서울보건대학 부설 병원경영연구소 논문집 Vol.4 No.2
This study was performed to examine the current management of hospital wastes and to investigate the contents. rules and systems concerning management of hospital wastes to find out the countermesures by the subjects. The amount and the present storage of hospital wastes and the collection. conveyance and handling of the consignment treatment company were investigated according to the examiration. the suitable treatment of hospital wastes has not been carrid out for the defect of the current management and handling capacity. To take charge of hospital wastes effectively and sanitarily. at the first place. a professional should understand the contents of wastes correctly and manage all systems by the characteristics. The improvement of storage and conveying container is required absolutly for sanitary management. An air-tight vessel should be used for storage container it should make a unification of a bicameral system.
알루미늄 합금 가공용 Low mist 형 청정 절삭유의 생분해 및 생물학적 폐수 처리 평가에 관한 연구
차병훈,김용석,이광현 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.2
<P>본 연구에서는 이러한 절삭유의 환경오염을 감소시키기 위하여 생분해도가 높은 절삭유의 동력학적 인자 도출을 통해 실제 적용 여부를 타진하였다. 실험 결과 기존 절삭유의 동력학적 인자는 Y=0.53, k<SUB>d</SUB> = 0.03 d⁻¹, μ<SUB>max</SUB> = 15.36d⁻¹, k<SUB>s</SUB> = 805.35㎎/L, k=29.07d⁻¹로 나타났고, 생분해도가 높은 절삭유는 종류에 따라 Y=0.21~0.38, k<SUB>d</SUB>=0.05~0.13d⁻¹, μ=0.64~3.3d⁻¹, μ<SUB>max</SUB>=0.71~3.7d⁻¹, k<SUB>s</SUB>=131.6~256.7㎎/L, k=0.27~0.83d⁻¹으로 나타났다.</P>
알루미늄 합금 가공용 Low mist 형 청정 절삭유의 생분해 및 생물학적 폐수 처리 평가에 관한 연구
차병훈(Byung-Hoon Cha),김용석(Yong-Suk Kim),이광현(Kwang-Hun Lee) 한국환경관리학회 2006 環境管理學會誌 Vol.12 No.2
본 연구에서는 이러한 절삭유의 환경오염을 감소시키기 위하여 생분해도가 높은 절삭유의 동력학적 인자 도출을 통해 실제 적용 여부를 타진하였다. 실험 결과 기존 절삭유의 동력학적 인자는 Y=0.53, kd = 0.03 d?¹, μmax = 15.36d?¹, ks = 805.35㎎/L, k=29.07d?¹로 나타났고, 생분해도가 높은 절삭유는 종류에 따라 Y=0.21~0.38, kd=0.05~0.13d?¹, μ=0.64~3.3d?¹, μmax=0.71~3.7d?¹, ks=131.6~256.7㎎/L, k=0.27~0.83d?¹으로 나타났다. In this study, it is investigated that whether cutting oil can be apply practically through kinetic factor of high Biodegradability Cutting oil to decrease environmental pollution. Experimental result from test of kinetic factor was Y = 0.53, kd=0.03d?¹, μ=8.09d?¹, μmax=15.36d?¹, ks=805.35㎎/L, k=29.07d?¹ and high Biodegradability Cutting oil from kinds of kinetic factor showed Y=0.21~0.38, kd=0.05~0.13d?¹, μ=0.64~3.3d?¹, μmax=0.71~3.7d?¹, ks=131.6~256.7㎎/L, k=0.27~0.83d?¹