http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Knee Flexion Angles Influence Hip Extensor Activity During Prone Heel Squeeze
Hyo-jung Jeong,Ji-hyun Lee,Woo-jeong Choi,Heon-seock Cynn 한국전문물리치료학회 2014 한국전문물리치료학회지 Vol.21 No.4
The purpose of this study was to determine the muscle activities of the erector spinae (ES), gluteus maximus (Gmax), gluteus medius (Gmed), and the hamstring (HAM) and the ratios of Gmax/ES, Gmax/HAM, and Gmed/HAM during the prone heel squeeze (PHS) with different knee flexion angles (45°, 90°, and 135°). Fifteen young and healthy subjects (8 men, 7 women) were recruited for the study. Surface electromyography signals were collected on ES, Gmax, Gmed, and HAM during PHS. A separate one-way analysis of variance with repeated measures was used to determine the significance of the muscle activities of ES, Gmax, Gmed, and HAM and the ratios of Gmax/ES, Gmax/HAM, and Gmed/HAM with different knee flexion angles during PHS. There was a significant increase in the Gmax activity at the knee flexion of 90° in comparison with that of the 45° (p=.016). There were significant increases in the Gmed activity at the knee flexion of 90° (p=.008) and 135° (p=.006) in comparison with that of the 45°. There were significant decreases in the HAM activity at the knee flexion of 90° (p=.009) and 135° (p=.004) in comparison with that of the 45°. There were significant increases in the Gmax/HAM muscle activity ratio at the knee flexion of 90° (p=.007) and 135° (p=.012) in comparison with that of the 45°. There were significant increase in the Gmed/HAM muscle activity ratio at the knee flexion of 135° in comparison with that of the 45° (p=.008). The knee flexion of 90° during PHS can induce decreasing activity of HAM and increasing activity of Gmax, and the knee flexion of 135° during PHS can induce decreasing activity of HAM and increasing activity of Gmed. Hence, PHS with different knee flexion positions could be considered for the different target muscle.
Hyo-uen Kim,Oh-yun Kwon,Chung-hwi Yi,Heon-seock Cynn,Houng-sik Choi 한국전문물리치료학회 2013 한국전문물리치료학회지 Vol.20 No.4
The purpose of this study was to determine the effect of contralateral hip adduction (CHA) on the muscle activity of lumbar stabilizers and the angle of pelvic lateral tilting during hip abduction in side lying. Twenty healthy male subjects with no medical history of lower extremity or lumbar spine disorders were recruited for the study. Subjects randomly performed preferred hip abduction (PHA) and hip abduction with contralateral hip adduction in side lying. The muscle activities of the dominant side rectus abdominis, external oblique, internal oblique, quadratus lumborum, gluteus medius, and non-dominant side hip adductor longus were measured during PHA and CHA by using a surface electromyography (EMG) system. Pelvic lateral tilting motion was measured by using a three-dimensional motion analysis system. Data on EMG and pelvic motion were collected at the same time during PHA and CHA. A paired t-test was used to compare EMG activity and the angle of pelvic lateral tilting in the two exercises. The study found that the EMG activities of all muscles were more increased significantly in CHA than PHA condition. The angle of pelvic lateral tilting was more decreased significantly in CHA than PHA condition. These findings suggest that CHA could be recommended as a hip abduction exercise for activating lumbar stabilizers and decreasing compensatory pelvic lateral tilting motion.
Kim, Hyo-Cheol,Chung, Jin Wook,Choi, Seung Hong,Im, Seock-Ah,Yamasaki, Yasundo,Jun, Suryoung,Jae, Hwan Jun,Park, Jae Hyung Springer Verlag 2012 Cardiovascular and interventional radiology Vol.35 No.1
<P>This study was designed to investigate the in vivo effects of combination therapy with TSU-68 and chemotherapeutic infusion in a rabbit VX2 liver tumor model.</P>
( Woo Jeong Choi ),( Ji Hyun Lee ),( Hyo Jung Jeong ),( Tae Lim Yoon ),( Heon Seock Cynn ) 한국전문물리치료학회 2014 한국전문물리치료학회지 Vol.21 No.3
The purposes of the current study were to (1) estimate the inter-rater agreement for visual assessment of scapular downward rotation (SDR), (2) develop the scapular downward rotation index (SDRI) as a method to measure SDR objectively and quantitatively, and (3) analyze the intra- and inter rater reliability of the SDRI. Twenty subjects with scapular downward rotation syndrome (SDRS) were recruited for this study. The visual assessment and the measurement for the SDRI were conductedby two examiners in two sessions each. The SDRI [(a-b)÷a×100] is calculated with the measurement of two linear distances: One is a perpendicular distance from the root of the scapular spine to the thoracic mid-line (a), and the other is a perpendicular distance from the inferior angle of the scapula to the thoracic mid-line (b). Cohen’s kappa coefficient was calculated to estimate the inter-rater agreement for visual assessment. Intra-class correlation coefficients (ICCs) with a 95% confidence interval (CI), thestandard error of measurement, and minimal detectable differences were calculated to assess intra- and inter-rater reliability of SDR measurement using the SDRI. The results indicated that the kappa coefficient of inter-rater agreement for visual assessment was fair (κ=.21). The intra-rater reliability of SDR measurement using the SDRI was excellent for examiner 1 (ICC=.92, 95% CI=.78∼.97) and good for examiner 2 (ICC=.82, 95% CI=.55∼.93). The inter-rater reliability was moderate (ICC=.73, 95% CI=.32∼.89). These findings showed that SDR measurement using the SDRI for subjects with SDRS may beconsidered reliable and better than the visual assessment
Cho, Hyun-Jai,Youn, Seock-Won,Cheon, Soo-In,Kim, Tae-Youn,Hur, Jin,Zhang, Shu-Ying,Lee, Seung Pyo,Park, Kyung-Woo,Lee, Myoung-Mook,Choi, Yun-Shik,Park, Young-Bae,Kim, Hyo-Soo Ovid Technologies Wolters Kluwer -American Heart A 2005 Arteriosclerosis, thrombosis, and vascular biology Vol.25 No.6
<P>OBJECTIVE: New vessel formation is a dynamic process of attachment, detachment, and reattachment of endothelial cells (ECs) and endothelial progenitor cells (EPCs) with each other and with the extracellular matrix (ECM). Integrin-linked kinase (ILK) plays a pivotal role in ECM-mediated signaling. Therefore, we investigated the role of ILK in ECs and EPCs during neovascularization. METHODS AND RESULTS: In human umbilical cord vein ECs and EPCs, endogenous ILK expression, along with subsequent cell survival signals phospho-Akt and phospho-glycogen synthase kinase 3beta, was reduced after anchorage or nutrient deprivation. Even brief anchorage deprivation resulted in retarded capillary tube formation by ECs. Adenoviral ILK gene transfer in ECs and EPCs reversed the decrease in cell survival signals after anchorage or nutrient deprivation, leading to enhanced survival, reduced apoptosis, and significantly accelerated the functional recovery after reattachment. And ILK overexpressing EPCs significantly improved blood flow recovery and prevented limb loss in nude mice hindlimb ischemia model. Furthermore, the efficacy of systemic delivery was equivalent to local injection of ILK-EPCs. CONCLUSIONS: ILK overexpression protects ECs and EPCs from anchorage- or nutrient-deprived stress and enhances neovascularization, suggesting that ILK is an optimal target gene for genetically modified cell-based therapy. Neovascularization is a dynamic process of detachment and reattachment of ECs and EPCs. Endogenous ILK expression was decreased in various stress conditions, and the gene transfer of ILK protected ECs and EPCs from temporary anchorage or nutrient deprivation. Furthermore, ILK gene transfer in EPCs significantly enhanced neovascularization in vivo.</P>
김상효(Kim Sang-Hyo),최문석(Choi Moon-Seock),조광일(Cho Kwang-Il),윤지현(Yoon Ji-Hyun) 대한토목학회 2011 대한토목학회논문집 A Vol.31 No.4A
최근 들어 여러 분야에서 환경오염을 최소한으로 줄일 수 있는 대책을 연구하고 있다. 하지만 토목구조물의 경우 많은 자재와 공정괴정을 거쳐 건설되어 환경에 미치는 영향이 적지 않을 것으로 예상됨에도 불구하고 현재까지도 환경오염에 대한 대책과 연구가 부족한 현실이다. 따라서 본 논문에서는 환경오염 대책 수립을 위해 반드시 수행하여야 하는 환경적합성평가를 강박스교량을 대상으로 수행하였다. 토목구조물 생애주기 단계를 반영하여 타 분야에서도 널리 쓰이고 있는 환경적합성평가방법인 전과정평가(LCA)절차에 따라 평가를 실시하였으며, 대표적인 전과정평가 방법인 직접조사법과 간접추계법을 사용하여 대상교량의 환경영향을 검토하였다. 분석결과, 온실가스의 대표적인 CO₂를 기준으로 평가하였을 때 직접조사법을 이용 할 경우 241.27 ton의 CO₂가 발생하였으며, 간접추계법을 사용할 경우 221.03 ton의 CO₂배출량이 발생하였다. 또한 발생한 CO₂는 대부분 건설자재 제조/생산단계에서 배출되는 경향을 보여, 환경오염을 줄이기 위해서는 구조적 안전성을 유지하는 범위 내에서 원자재의 총량을 줄이는 효율적인 설계가 필요할 것이라 판단된다. 본 논문에서 진행된 토목구조물에 대한 상세한 전과정평가는 향후 토목구조물에 대한 환경적합성 평가 기준 마련을 위한 연구 시, 참고지료로서 활용될 수 있을 것으로 판단된다. Recently, methods on minimizing environmental effect caused from human-made goods have been studied in various research fields. Such issue has been also spotlighted into the civil engineering field; however, application of environmental performance assessment on civil structures is very complicated, since they handles vast ranges of materials and has comparatively long life span with various construction stages. Thus, this study intended to apply environmental performance assessment into an ordinary type of steel box girder bridge, using most popular Life cycle assessment (LCA) procedures, which are called Survey-based method and Indirect method. For better comparison of two methods, greenhouse effect of the example bridge is considered. As result of analysis, total CO₂ emission is evaluated as 241.27 ton with Survey-based method while it is evaluated as 221.03 ton with Indirect method. It is also revealed that most CO₂ is generated from the process of manufacturing and producing construction materials. Such result indicates that the efficient design which secures certain level of structural safety with minimized input materials. It is considered that the specific LCA on civil structure performed in this study could be utilized to other civil structures for reasonable environmental performance assessment.