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임상연구 : 성상신경절 차단이 돌발성 난청의 치료에 미치는 영향
송종욱 ( Jong Wook Song ),심재광 ( Jae Kwang Shim ),문진천 ( Jin Cheon Moon ),안은경 ( Eun Kyoung Ahn ),금창만 ( Chang Man Kum ),윤덕미 ( Duck Mi Yoon ),이원상 ( Won Sang Lee ),신증수 ( Cheung Soo Shin ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.1
Background: Idiopathic sudden sensorineural hearing loss (ISSNHL) is defined as a sensorineural hearing loss which develops abruptly without definitive causes. Stellate ganglion block (SGB) has been used as one of the treatment modalities in ISSNHL. However, published data establishing the effect of SGB has been slim. We conducted this study to evaluate the effect of SGB according to the factors that may influence the prognosis of the disease. Methods: We reviewed the records of 343 patients. The control group was managed with medications, and the SGB group was managed with SGB and the same medications. SGB was performed with 5 ml of 1.0% mepivacaine. The pure-tone audiogram was performed after the therapy and Siegel`s criteria was used to define the recovery of hearing. Results: The recovery rate of the SGB group was higher than that of the control group (58.1% vs. 42.1%, P < 0.05). The SGB group had a higher recovery rate than the control group in patients treated within 7 days from the onset of symptoms (66.9% vs. 44.1%, P < 0.05), without diabetes mellitus (58.5% vs. 44.9%, P < 0.05), without dizziness (61.6% vs. 44.6%, P < 0.05), or whose initial hearing loss was between 71 and 90 dB (69.4% vs. 38.9%, P < 0.05). Conclusions: SGB is thought to be a useful therapy for ISSNHL, especially in the patients treated within 7 days, without diabetes mellitus, dizziness, or whose initial hearing loss was severe. (Korean J Anesthesiol 2006; 51: 52~7)
신윤혁(Yoonhyuk Shin),심승규(Seungkyu Sim),송종욱(Jongwook Song),김철민(Chulmin Kim),임동현(Donghyun Lim),김성철(Sung Chul Kim) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
In this study controller integrated heater modules using high voltage power were made for electric vehicles. The heat core and controller for the heater module were designed to improve the heater power density. We also investigated the performance characteristic(heating capacity, energy efficiency, pressure drop) of heater modules through the experiments. Therefore, the experimental results indicated that prototype of heater module had satisfactory performance. This study will contribute to developing the heating system for electric vehicle.
프리캠버가 적용된 7.5m 무동바리 장스팬 거푸집의 구조성능에 관한 실험적 연구
강지수 ( Ji Su Kang ),이승재 ( Seung Jee Lee ),송종욱 ( Jong Wook Song ),원용호 ( Yong Ho Won ),최성모 ( Sung Mo Choi ) 한국복합신소재구조학회 2016 복합신소재구조학회논문집 Vol.7 No.2
Cap decks used in slim floor system for reducing floor height act as molds for forming floor slabs in structures with a span of up to 6m without temporary supports. When deep decks are employed in a structure with a span of more than 6m, the problem of defection occurs. This study suggests placing tendons at the ends of cap decks in order to create cambers and control defection when preload is applied. Uniformly distributed load was applied by an UTM to the two L/4 points of specimens to observe the deflection of preloaded cap decks. For the test, three 7.5m specimens were fabricated. One of them was a plain cap deck specimen and the others were those with tendons (PC strands or steel bars.