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조병진,안기원,Cho Byung-jin,Ahn Kee-won 한국관개배수위원회 2000 한국관개배수논문집 Vol.7 No.2
The tidal land reclamation schemes and projects located along the western coast of North Korea were investigated by the remote sensing using sattelite image data such as Landsat TM and Jers-1 data. North Korea reported their ambitious territory expansion
Application of RS/GIS Integration for the Landuse Planning in the newly Reclaimed Tideland
조병진,유경학,조정청사,Cho Byung-jin,Yoo Kyung-hak,K Torii Korean National Committee on Irrigation and Draina 1997 한국관개배수논문집 Vol.4 No.1
지상관측위성에 탑재된 센서로부터 얻어진 자료는 지리정보데이터로 그 이용이 증가되고 있다. 이 연구에서는 신규간척지에서의 토지이용계획을 수립하기 위하여 위성자료를 이용한 원격탐사와 지리정보 체계를 종합하는 방법의 적용가능성을 다루고 있다. 현재 공사중인 간척사업지구를 커버하는 LANDSAT TM, MOS, SPOT 디지털데이터를 영상화하고, 영산강 3단계 사업지구 유역의 토지이용 현황을 분석하였으며, 신규간척지의 토지이용계획을 위하여 동원가능한 데이터를
조병진(Byungjin Cho),김거영(Geoyoung Kim),이정준(Jeongjun Lee),구정서(Jeongseo Koo) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10
철도차량의 차륜결함은 레일과의 접촉부에서 마찰로 인하여 발생하므로 주기적인 예방정비를 통하여 육안으로 확인하고 있다. 최근에는 유지보수비용을 크게 절감 할 수 있는 상태기반유지보수(CBM)를 이용한 이상진단 모니터링 시스템 개발이 요구되고 있다. 차륜과 같은 회전체의 이상진단을 위한 진동신호 분석법으로 켑스트럼(cepstrum)을 적용하여 찰상상태를 검출하였다. 분석을 위한 정상 및 찰상차륜의 진동신호는 차륜/레일 접촉조건을 고려한 동역학 시뮬레이션을 통하여 분석하였다. 외란이 포함된 찰상차륜의 cepstrum 분석결과 차륜회전주기의 찰상신호를 효과적으로 검지할 수 있었다. Defects of railway wheel have been checked by the unaided eye with a periodic preventive maintenance because they occur from frictions of rail and wheel-contact. These days, it is required to develop monitoring systems by using CBM which can reduce maintenance expenses. We detected flat wheels by using a Cepstrum which is one of vibration signal analysis methods for checking defects of a body of a revolution like a wheel. We analyzed vibration signals of normal and flat wheels considering a wheel/rail contact by using a simulation program. We could find defect signals in wheel effectively with a result of the Cepstrum analysis in the flat wheel including a disturbance.
Baxter R 를 이용한 Morphine 과 Bupivacaine 의 지속적인 경막외 투여가 술후 제통효과에 대한 임상적 고찰
조병진(Byang Jin Cho),윤영준(Young Joon Yoon),진상 대한통증학회 1994 The Korean Journal of Pain Vol.7 No.2
N/A The analgesic efficacy and side-effects of combined continuous epidural infusion of bupivacaine and morphine, in comparison with intramuscular GM) administration of narcotics, for postoperative pain relief after cesarean section and hysterectomy were evaluated. We di- vided 60 patients into 4 groups randomly. IM (meperidine) group after cesarean section (Group 1, n=20); Continuous epidural group after cesarean section (Group 2, n=20g IM (meperidine) group after hysterectomy (Group 3, n=10g Continuous epidural group after hysterectomy (Group 4, n= 10). Following each operation, the epidural groups had an epidural catheter placed (L2-3 or L3-4), and a bolus of l.5mg of morphine was injected, and followed by continuous infusion of 0.3% bupivacaine 2ml/hour and morphine 2.5mg/day for 48 hours. The IM groups had received me- peridine 50mg IM injection every 4 hours as needed. We evaluated analgesic efficacy with VAS (visual analogue scale) at 1, 2, 24, 48, and 72 hours after operation. The side-effects (nausea Cr, vomiting, respiratory depression, pruritus and uri- nary retention) were evaluated with 4 points scale at day 1, 2, and 3 after operation. The results were as follows 1) The continuous epidural (bupivacaine+morphine) groups were superior to the IM (meperi- dine) groups with respect to postoperative analgesia at 1, 2, and 24 hours after cesarean section, and at 1, 2, 24, and 48 hours after hysterectomy. 2) Vomiting were more frequent in the epidural groups 2 days after cesarean section. 3) Pruritus was more frequent in the epidural groups 1 and 2 days after cesarean section
유압 브레이커 메인바디의 충격 및 소음 저감을 위한 완충 장치에 대한 연구
조병진(Byung Jin Cho),한훈희(Hoon Hee Han),구정서(Jeong Seo Koo) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.4
A hydraulic breaker is an attachment of an excavator, and it crushes stones. Recently, research to reduce the impact and noise of breakers are ongoing. In this paper, a method to improve the upper, lower, and side dampers, which act as insulation for the attenuation of vibration during breaker operation, is studied through testing and simulation. To obtain the nonlinear material constants required for the simulation, the biaxial tensile test was performed with urethane, which is a material used for dampers. The existing parts and the improved parts were compared and evaluated using the LS-DYNA program. As a result, 50% of the equivalent stress was reduced in the bracket body of the hydraulic breaker, and the equivalent stress of the side damper was also decreased. We verified that the fatigue conditions were satisfied by performing a fatigue analysis.