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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.
표준플랜트근사화를 이용한 H 혼합감도문제의 제어기 차수 줄임
박홍배,윤한오,오도창,엄태호 경북대학교 전자기술연구소 1994 電子技術硏究誌 Vol.15 No.2
In the conventional H^∞ design, controller has the same order with standard plant. If the order of the standard plant is high, the controller has high order. In this paper, we propose a controller order reduction algorithm in H^∞mixed sensitivity problem. The H^∞mixed sensitivity problem is transformed to H^∞-norm minimization problem of the mixed sensitivity function with unnormalized coprime factors. And we construct a standard plant with CSD(chain scattering description) form. Then we reduce the order of the standard plant using balanced truncation, and derive an allowable H^∞-norm error bond in the standard plant approximation to determine the order of robust controller before its design. Using this error bound, an H^∞-norm upper bound of the mixed sensitivity function is found. Finally, we design the reduced order controller of the reduced order standard plant using J-lossless coprime factorizations.
박홍배,장안수,서정평,양승원,조남중,이 숭 대한소화기학회 1999 대한소화기학회지 Vol.33 No.6
Pancreatic fistula is a rare complication which occurs in acute and chronic pancreatitis, or after trau matic or surgical disruption of pancreatic duct. Fistula may drain spontaneously into adjacent hollow viscera, peritoneal and pleural cavities (internal fistula) or communicate with the body surface exter nally (external fistula). We recently experienced a case of pancreatico-gastric fistula after acute phase of chronic pancreatitis without pseudocyst. To our knowledge, this is the first case in Korea. The patient was a 75-year-old man with epigastric and left upper quadrant abdominal pain. Abdomina computerized tomography (CT) and ultrasonography showed enlarged, poorly marginated pancreas with irregular dilated pancreatic duct. Endoscopic examination showed small orifice with marginal whitish mucosa at posterior wall side of gastric antrum. Endoscopic retrograde cholangiopancreato graphy showed irregular dilated duct in tail of pancreas and collection of contrast medium in fundu of stomach. CT guided aspiration and biopsy of pancreas showed fibroadipose tissue infiltrated with chronic inflammatory cells.
오늘의 일본기업 : The Twenty First Century Japan
박홍배 원광대학교 채문연구소 1993 역사와 사회 Vol.11 No.-
주로 일본의 기업시스템과 기업행동과 기업의 소유관념에 관하여 토론을 하였다. 일본기업은 품질관리를 위해 전종업원이 중심이 되어 활동하는 특징이라고 참석자들은 보았다. 그리고 우리 사회의 경제상황과 문화풍토에 대해 경영자 및 정책결정자가 정책을 제안하고 대중이 그것에 찬성하여 정열적으로 참여할 수 있도록 동기를 부여하는 방식이 적합하다는 결론을 내렸다.
SBR 함수를 이용한 제어기 설계알고리즘 및 H 최적화
박홍배,윤한오,김수중 경북대학교 전자기술연구소 1992 電子技術硏究誌 Vol.13 No.1
In this paper, we propose an algorithm of designing a robust controller which simultaneously stabilizes three plants. Controller design problem is equivalent to finding a unit in H'. To lower the degree of controller, we use the interpolation algorithm based on positive real function. The free parameter of the controller which strongly stabilizes auxiliary plant is estabilished to SBR function. Then the designed stable controller can be used as the free parameter for simultaneously stabilizing controller. Also the optimal controller which minimizes H'-norm of weighted sensitivity function is found. Finally, a numerical example is given to illustrate the proposed algorithm.
좁은 帶域幅을 가지며 中心周波數와 帶域幅이 독립적으로 可變되는 能動 RC 帶域幅過瀘波器의 設計
朴烘培 慶北工業專門大學 1980 論文集 Vol.17 No.-
In this paper, an active RC bandpass filter circuit with narrow bandwidth is proposed by using 2 operational amplifiers, 3 resistors and 2 capacitors. 2 resistors control center frequency and bandwidth independently in active filter having a range of 10 to 300. Maximum output voltage is 1Vp-p in order to prevent oscillation and 20㎐ bandwidth at center frequency 1㎑. The proposed circuit has low sensitivity to all passive elements, is suitable for measuring noise. A design example and experimental results are presented.