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일반중방식 도장계의 열화 평가를 위한 실내 부식촉진실험 조건의 특성 및 적용성 평가
정영수 ( Jeong Young-soo ),유훈 ( Yoo Hoon ),강영구 ( Kang Yeung-ku ),안진희 ( Ahn Jin-hee ),김인태 ( Kim In-tae ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.2
도장에 의한 방식법은 방식 효과, 대상물의 크기나 형상, 설치장소에 무관하게 적용할 수 있으며, 해상 강교량 외관의 미적 효과 증대라는 장점을 가지고 있다. 하지만 방식도막은 주요 구성 물질이 고분자로 이루어져 있어 주변환경에 따라 노화정도는 다양하게 나타나고 있다. 강교량용 중방식 도장계의 열화평가 및 내구수명 추정을 위한 실내 부식촉진실험의 적용성에 연구가 진행되고 있다. 하지만 강구조물용 일반 중방식 도장계의 노화진전속도 및 잔존수명 예측을 위한 국내외 표준평가 방법에 대한 효율성, 적용성 및 특성 등의 비교 분석이 필요하다.
정영수 ( Jeong Young Soo ),김민정 ( Kim Min Jeong ),신창희 ( Shin Chang Hee ),차기혁 ( Cha Ki Hyuk ),김인태 ( Kim In Tae ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
This study investigates the coating deterioration of water-borne inorganic zine under marine environment. In order to evaluate the corrosion environment at installed site, the corrosion currents were measured by atmospheric corrosion monitoring(ACM) sensor. The deterioration grade of water-borne inorganic zine was investigated by visual inspection method depending on ASTM D610. The deterioration grade of structural member was compared based on corrosion environment such as wet time, amount of deposited salt etc.
정영수 ( Jeong¸ Young-soo ),김기혁 ( Kim¸ Gi-hyeok ),김인태 ( Kim¸ In-tae ) 한국구조물진단유지관리공학회 2020 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.24 No.2
강구조물은 도장에 의한 방식법을 적용하고 있으며 염분 및 자외선 등과 같은 여러 요인에 의하여 노화가 진행된다. 도장의 경우 대기 부식 환경하의 도막열화로 인하여 그 수명이 제한되므로 공용기간 동안 지속적이며 반복적인 재도장이 진행된다. 도장을 통하여 부식에 대한 강구조물의 내구성능을 확보하는 탄소강은 도막열화로 인하여 그 수명이 제한되므로 무도장 상태일 경우의 부식저항성능을 검토할 필요가 있다. 본 연구에서는 부식촉진실험을 통한 무도장 강재의 부식속도와 ISO 9223의 부식환경별 부식속도의 비교를 통하여 촉진배율을 제안하고자 한다.
이중여자 유도형 풍력 발전기의 PSCAD 시뮬레이션 모델 개발
정병창(Jeong, Byoung-Chang),김희중(Kim, Hee-Jung),정용호(Chung, Yong-Ho),전영수(Jeon, Young-Soo),곽노홍(Kwak, No-Hong),송승호(Song, Seung-Ho) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
In this paper, doubly-fed induction-type wind power generation system simulation model for grid connection is developed. The simulation model is based on PSCAD/EMTDC and consists of rotor-blade, blade controller, generator power converter and generator controller Blade controller controls the blade pitch angle for starting, peak power limiting and emergency condition. Generator controller controls the generator output power to maximize the system efficiency. Simulation results are shown for the variable wind speed conditions. The simulation model can be utilized for study of actual interaction between wind turbine and grid for reliable operation and protection of power system.
선행적 진통 요법의 효과성에 대한 연구 -발치 전과 후 진통 요법의 효과 비교-
정영수,김문기,박형식,이의웅,강정완,Jung, Young-Soo,Kim, Moon-Key,Park, Hyung-Sik,Lee, Eui-Wung,Kang, Jeong-Wan 대한치과마취과학회 2003 Journal of Dental Anesthesia and Pain Medicine Vol.3 No.1
Background: Studies on the pain have been dealing with many different ways for last several centuries. Especially, preemptive analgesia is being used as a method to control the postoperative pain. Many studies on its efficacy have been processed in different ways about various drugs, administration methods and times for various operations. And the value of preemptive analgesia are still controversial regarding the results of other clinical studies. The authors performed a clinical study on efficacy of preemptive analgesia using an non-steroidal anti-inflammatory drug (NSAID) for the surgical extraction of impacted third molar teeth and present the more effective pain treatment after oral surgery with literature review. Methods: Using a randomized double blind test design, this study compared the analgesic efficacies of an NSAID, Talniflumate 370 mg. This drug administrated first either 1 hour preoperatively (experimental group) or when the pain developed moderately to severely over 5 scale of verbal rating scales (0-10) to respective 30 patients undergoing the removal of impacted third molars. Pain intensity and the time from the end of surgery were assessed postoperatively whenever the patients demanded additional drug over 5 scale for forty eight hours using same verbal rating scales. Results: The sex distribution, the age of the patients. and the time required for surgery in two groups were similar. The average first time for demanding additional drug after surgery was 163.9 minutes in experimental group and 191.5 minutes in control group. At this time, the average pain intensity was 5.8 in experimental group and 6.1 in control group. And the average second time for demanding additional drug was 365.5 minutes in experimental group and 351.8 minutes in control group. At this time. the average pain intensities were 6.6 in experimental group and 6.2 in control group. No statistically significant difference was found between the average first times and second times, and the average pain intensities at first and second times in two groups. Conclusions: From these results the efficacy of preemptive analgesia used in this study was not appeared. This clinical study indicates that many NSAIDs administrated preoperatively in present practices have weak efficacy of preemptive analgesia for postoperative pain, thus the authors recommend that only postoperative analgesics are adequate without preoperative use of analgesics.