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      • KCI등재

        중공 섬유를 이용한 자동차 흡음재 성능 향상 연구

        이정욱(Lee, Jung-Wook),이수남(Lee, Su-Nam),심재현(Shim, Jae-Hyun),정판기(Jung, Pan-Ki),이원구(Lee, Won-Ku),방병주(Bang, Byoung-Joo) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.9

        Generally, sound-absorbing materials in vehicles are used for giving the comfort to passengers by reducing noise while driving. Materials of which targets are light weight, high performance, eco friendliness and recycling have been developed recently. In this study, sound-absorbing materials using PET(polyethylene terephthalate) hollow fibers to achieve the light weight and the high sound absorption performance are developed, and then evaluated to meet a requirement for the automotive components. The test results show that the acoustic performances of developed products having new fiber structure are better than those of the conventional product.

      • SCOPUSKCI등재

        식도정맥류의 (食道靜脈瘤) 내시경 (內視鏡) 및 임상적 (臨床的) 고찰

        전병철(B C Jun),한정렬(J R Han),정판기(P G Jung),양영철(Y C Yang),하승희(S H Ha),여향순(H S Yeo),박홍배(H B Park) 대한소화기학회 1985 대한소화기학회지 Vol.17 No.2

        N/A One hundred and seventy eight cases of esophageal varices confirmed by esophnagogastro- duodenoscopy from January 1978 to August 1983 were studied. The varices were classified by the Sesoko method into three grades: Grade I, Grade Ii, Grade I according to the severity of varices. Esophagogastroduodenoscopy was done with JFB2, of Olympus and GIF-L of Fujinon. The observed results are summarized as follow: 1) Men predominated over woman in ratio of 5.5:1, and high incidence in 5th, 6th decade was noted 2) Causes of esophageal varix were as follow: Liver cirrhosis 140 cases(82%) Primary hepatoma 15cases(8.8%) Chronic hepatitis and fatty liver 13cases Metastatic hepatoma 3cases 3) Hemorrhage was noted in 116 esophageal varix cases and there was no correlation between severity of esophageal varix and bleeding frequency. 4) Level of serum albumin decreased in 72 cases below 3.0gm% and there was no correlation between severity of esophageal varix and level of serum albumin. 5) Level of serum bilirubin was in normal range in 113cases(60%), and SGOT, SGPT were normal or minimaly elevated in 125 cases(74%) 6) Esophagogastroduodenoscopy revealed causes of VGI bleeding of esophageal varix patient as follow: Hemorrhagic gastritis 10cases, Gastric ulcer 15 cass, Duodenal ulcer 6 cases 7) Splenomegaly was noted in 109cases and there was correlation between splenomegaly and severity of varix.

      • KCI등재후보
      • SCOPUSKCI등재

        긴급 내시경으로 진단된 상부 위장관 출혈의 임상적 고찰

        박홍배,여향순,하승희,한정열,정판기,양영철 대한소화기내시경학회 1985 Clinical Endoscopy Vol.5 No.1

        Department of Internal llafedicine, Kwarrqju CTtristian Hospltul Emergency endoscopy was performed in 315 patients for recent four years The aouree of upper GI bieeditag in these 315 cases were as follows: Esophageal varx(3), gastric ca(39), Mallory-we;3s syndromei(74), gastric ca(3),- Duodenal ulces(i)lrosive gastritis(14,1, Marginal ulcer(2), Goaabined case(24)k Unknown cases, Essential It was not performed in 4 died case because of poor general conditions. After check up H, Heart, P1use rate, that examination wad performed during drip infusion to he safety of ciralatary system. No compioatian were encountered. To confirm the source of bldeding 8t earlier stogie, was useful to decide which way, that is conservative of surgical therapy 'n which better far the Management. The results are as follows: f) The sex incidence of upper GI bleeding showed Male predominance c a ratio 4.6 : 1 and peak ale groups were 4th & 5th' decade. 2) Endoscbpic diagnosis of upper GI Bleeding in the studies case were in the ardeof Esophageal varix bleeding(29), Gastric ulcer(23.5), Mallory weiss eyndrome(12.), Duodenal uler(fi.'o) Erosive gastritis(j1.) We could not find the bleeding site in 3.216 of the studied case. 3) The cause of emergency endoscopy',are Melena(19), Hemateness(22.0) and combi ned(58. 4) 4) Among the 315 uses of upper GI bjleeding, 70.1 of the eases revealed moderate degree of bleeding. 5) Among the 315 cases of upper tr'*I 1',feeding, 28. 1' of the eases were confirmed of nducing factor. 6) Among the 3i5 cases of upper $I bileeding, 69io f the cases received an endascop.ic examinatcan within 72 hr after initial eaisode of bleedag. 7) The discovery rate of lesion was as follows. within 12 hrs, the discovery rate was 67같. From 12 hr, to 24 hr, the rate 48. From, 24 hr to 48 hr, the rate 3996. From 48 hr to 72 hr, the rate 2. 7. 8) The therapy of upper GI bleeding consists ef medical therapy(86,6), surgical therapy (14), the result of therapy shows 85 improvement.

      • SCOPUSKCI등재

        진단적 유두부절개술 2예

        김규순,박홍배,이상운,여향순,정판기,김재원,명재일 대한소화기내시경학회 1986 Clinical Endoscopy Vol.6 No.1

        E.S.T. is performed not only for the treatment but also for the diagnosis of biliary tract diseases. E.S.T. serves as a diagnostic aid for some of biliary tract diseases which require such procedures as a peroral cholangioscopy or biopsy of the biliary duct for precise diagnosis and further differential diagnosis. The diseases of our patients were diagnosed by clinical findings and such diagnostic maneuvers as abdominal ultrasonography, intravenous cholangiography, percutaneous transhepatic chorangiography(P.T.C.), endoscopic retrograde chorangiopancreatography(E.R.C.P.), In all the two cases, abdominal ultrasonography revealed dilated extrahepatic duct, but biliary trees were not visualized at E.R.C.P. In one of the two cases, P.T.C. revealed a filling defect with dilated common bile ducts(CBD) but we could not make a differential diagnosis of CBD stone from CBD cancer. In another of the two cases, on which intravenous cholangiography was done, we could not see CBD. For the purpuse of precise diagnosis and further differential diagnosis, we performed EST and then ERCP thraugh widened papillae. With those procedures, CBD stones were shown.

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