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김응균,이종대 ( Eung Kyun Kim,Jong Dae Lee ) 충북대학교 산업과학기술연구소 1996 산업과학기술연구 논문집 Vol.10 No.1
Abstract_Roman The cooling characteristics of electronic components located in an enclosure were investigated numerically using the SIMPLKR algorithm and QUICK scheme. The natural convection fluid flow and temperature distributions as functions of the as
±200kV급 HVDC 고분자애자 개발을 위한 표면개질된 Nano ATH 및 Nano Silica 혼합에따른 ±HVDC 절연파괴 및 기계적특성
전정혁(Jeong-Hyuk Jeon),김응균(Eung-Kyun Kim),민상기(Sang-Gi Min),이상민(Sang-Min Lee),이창엽(Chang-Yeop Lee),전수영(Su-Young Jeon),황주연(Ju-Yeon Hwang),김병철(Byung-Chul Kim),표판식(Pan-Sik Pyo),ALISHER,박재준(Jae-Jun Park) 대한전기학회 2023 대한전기학회 학술대회 논문집 Vol.2023 No.7
The surface of fumed nano-silica(nano-SiO2) was treated with alkyl silazane to change from hydrophilic to hydrophobic. Aluminum Trihydroxide(nano-ATH) was surface treated with vinyl silazane to improve electrical properties(high voltage direct current [HVDC] breakdown strength and tracking resistance). A kneader was prepared by mixing surface-modified nano-SiO2 and surface-modified nano-ATH with liquid silicon. and the effect on electrical properties of surface-modified nano-ATH was studied for application to heavy electrical equipment. Surface modification was confirmed through thermogravimetric analysis and contact angle analysis. As the nano-ATH content increased(±), HVDC breakdown strength and tracking resistance increased significantly. As the nano-ATH content increased, the leakage current that occurred initially was delayed and the current intensity decreased. The amount of erosion also decreased.
±200kV급 HVDC 고분자애자 개발을 위한 표면개질된 Nano ATH 및 Nano Silica 혼합에따른 ±HVDC 절연파괴 및 기계적특성
전정혁(Jeong-Hyuk Jeon),김응균(Eung-Kyun Kim),민상기(Sang-Gi Min),이상민(Sang-Min Lee),이창엽(Chang-Yeop Lee),전수영(Su-Young Jeon),황주연(Ju-Yeon Hwang),김병철(Byung-Chul Kim),표판식(Pan-Sik Pyo),ALISHER,박재준(Jae-Jun Park) 대한전기학회 2023 대한전기학회 학술대회 논문집 Vol.2023 No.7
The surface of fumed nano-silica(nano-SiO2) was treated with alkyl silazane to change from hydrophilic to hydrophobic. Aluminum Trihydroxide(nano-ATH) was surface treated with vinyl silazane to improve electrical properties(high voltage direct current [HVDC] breakdown strength and tracking resistance). A kneader was prepared by mixing surface-modified nano-SiO2 and surface-modified nano-ATH with liquid silicon. and the effect on electrical properties of surface-modified nano-ATH was studied for application to heavy electrical equipment. Surface modification was confirmed through thermogravimetric analysis and contact angle analysis. As the nano-ATH content increased(±), HVDC breakdown strength and tracking resistance increased significantly. As the nano-ATH content increased, the leakage current that occurred initially was delayed and the current intensity decreased. The amount of erosion also decreased.
임상연구 : 부인과 수술환자에서 Sufentanil과 병용한 0.1% Levobupivacaine 또는 0.1% Ropivacaine의 술 후 경막외 진통 비교
양춘우 ( Chun Woo Yang ),박정민 ( Jeong Min Park ),임영수 ( Young Su Lim ),조춘규 ( Choon Kyu Cho ),김경식 ( Kyong Sik Kim ),김응균 ( Eung Kyun Kim ),정성미 ( Sung Mee Jung ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.53 No.6
Background: Ropivacaine and levobupivacaine are recently introduced amide local anesthetics that are structurally similar to bupivacaine. In this study, we compared the quality of postoperative analgesia and the side effects of 0.1% ropivacaine/sufentanil and 0.1% levobupivacaine/sufentanil. Methods: Sixty patients scheduled for gynecologic surgery under general anesthesia were randomized to receive either 0.1% ropivacaine with sufentanil (ropivacaine group) or 0.1% levobupivacaine with sufentanil (levobupivacaine group) for postoperative epidural analgesia using a patient-controlled analgesia pump at a rate of 5 ml/h during the 48 hour period following surgery. Visual analogue scale (VAS) scores at rest and on coughing, sitting and movement, the degree of ambulation, additional analgesic requirements and side effects were assessed. Results: In the levobupivacaine group, VAS scores at rest and on coughing, sitting and movement were lower than in the ropivacaine group (P < 0.05). In the ropivacaine group more patients were able to walk unaided (P < 0.05). There were no differences in local anesthetic consumption, additional analgesic requirements and side effects between the groups. Conclusions: Both 0.1% ropivacaine with sufentanil and 0.1% levobupivacaine with sufentanil provided effective postoperative epidural analgesia, but ropivacaine produced lesser motor block. (Korean J Anesthesiol 2007; 53: 746~52)