http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
배근환(Guenhwan Bae),정동수(Dongsoo Jung) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11
In this study, performance of HFC410A was measured in an attempt to substitute HCFC22. HFC410A is near-azeotropic showing the gliding temperature difference (GTD) of less than 0.2℃. Actual tests were performed in a breadboard type laboratory heat pump/air-conditioner at the evaporation and condensation temperatures of summer condition(7/45℃) and winter condition(-7/41℃) respectively. Test results show that the coefficient of performance (COP) of HFC410A is 1.1~7.9% higher than that of HCFC22. Compressor discharge temperatures were almost same with HCFC22. The amount of charge for HFC410A was decreased by 7.4~11.5% as compared to that of HCFC22. Overall, these fluids provide good performance with reasonable energy savings without any environmental problem and thus can be used as long term alternatives for residential air-conditioning and heat pumping application.
Sciatic Nerve Injury Caused by a Stretching Exercise in a Trained Dancer
심호용,임오경,배근환,Seok Min Park,이주강,박기덕 대한재활의학회 2013 Annals of Rehabilitation Medicine Vol.37 No.6
Sciatic nerve injury after stretching exercise is uncommon. We report a case of an 18-year-old female trained dancer who developed sciatic neuropathy primarily involving the tibial division after routine stretching exercise. The patient presented with dysesthesia and weakness of the right foot during dorsiflexion and plantarflexion. The mechanism of sciatic nerve injury could be thought as hyperstretching alone, not caused by both hyperstretching and compression. Electrodiagnostic tests and magnetic resonance imaging revealed evidence of the right sciatic neuropathy from the gluteal fold to the distal tibial area, and partial tear of the left hamstring origin and fluid collection between the left hamstring and ischium without left sciatic nerve injury. Recovery of motor weakness was obtained by continuous rehabilitation therapy and some evidence of axonal regeneration was obtained by follow-up electrodiagnostic testing performed at 3, 5, and 12 months after injury.
HFC152a, HFC134a, 프로판을 포함한 자동차용 대체/보충 냉매의 성능 평가
강남구(Namkoo Kang),배근환(Guenhwan Bae),박기정(Ki-Jung Park),정동수(Dongsoo Jung) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.6
In this study, HFC152a, HFC134a/HFC152a and HC290/HFC134a/HFC152a mixtures are studied for the supplementary and alternative refrigerants for HFC134a used in automobile air-conditioners. Due to the high global warming potential of HFC134a, it has to be phased out in the long run. Thermodynamic performance of these refrigerants are measured in a bench tester of 3.5 kW capacity with an open type compressor under both summer and winter conditions. Test results show that the coefficient of performance (COP) and capacity of pure HFC152a and HFC134a/HFC152a mixture are 9.1~12% and 7% higher than those of HFC134a. As for the HC290/HFC134a/HFC152a, the COP is up to 9.5% higher than that of HFC134a with 1~2% of HC290 while that is up to 6.1% lower than that of HFC134a with 5% HC290. The capacity of the ternary mixture, however, is 8.6% higher than that of HFC134a at all compositions tested. The compressor discharge temperatures of all refrigerants tested are 6~10℃ higher than that of HFC134a. For all refrigerants, the amount of charge is reduced up to 32% due to the decrease in liquid density. Overall, these refrigerants provide good performance with reasonable energy savings with less environmental problem and thus can be used as long term alternatives for automobile air-conditioners.
경막외 주사 후 발생한 경막외 농양과 척추 골수염-증례보고-
이주강,임윤명,임오경,배근환,김성환,이광래,최충환,정점순 대한재활의학회 2008 Annals of Rehabilitation Medicine Vol.32 No.3
Epidural abscess and vertebral osteomyelitis induced by epidural injection is rare but one of the most serious complications. A 58-year old woman complained of aggrevating radicular pain to bilteral lower legs, tenderness on coccygeal area and claudication, after epidural injection for management of intractable sciatica. MRI and ultrasound revealed epidural abscess compressing dural sac at the level of L5-S1 vertebral body, sacrococcygeal abscess, and later S5- 1stcoccyx osteomyelitis. We report epidural abscess and vertebral osteomyelitis induced by caudal epidural injection.