http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Beausir, Benoî,t,Biswas, Somjeet,Kim, Dong Ik,Tó,th, Lá,szló,S.,Suwas, Satyam Elsevier 2009 Acta materialia Vol.57 No.17
<P><B>Abstract</B></P><P>Asymmetric rolling of commercially pure magnesium was carried out at three different temperatures: room temperature, 200°C and 350°C. Systematic analysis of microstructures, grain size distributions, texture and misorientation distributions were performed using electron backscattered diffraction in a field emission gun scanning electron microscope. The results were compared with conventional (symmetric) rolling carried out under the same conditions of temperature and strain rate. Simulations of deformation texture evolution were performed using the viscoplastic self-consistent polycrystal plasticity model. The main trends of texture evolution are faithfully reproduced by the simulations for the tests at room temperature. The deviations that appear for the textures obtained at high temperature can be explained by the occurrence of dynamic recrystallization. Finally, the mechanisms of texture evolution in magnesium during asymmetric and symmetric rolling are explained with the help of ideal orientations, grain velocity fields and divergence maps displayed in orientation space.</P>
운동선수의 대칭성을 위한 롤링 패턴의 평가와 중재 : 편측 종목 중심으로 연구
심운용,김재은 대한스포츠물리치료학회 2023 정형스포츠물리치료학회지 Vol.19 No.2
Purpose: The rolling pattern is a crucial part of human development and movement, utilized in assessingmovement development in children and evaluating the physical abilities of adults. This pattern is essentialfor enhancing various joint movements and balance, serving as a significant performance element for athletessuch as unilateral sports athletes. It can be a vital tool for injury prevention and identifying functionalimpairments, even among athletes. Methods: The rolling test helps differentiate localized and overall functional limitations. To conduct an accurateevaluation, it requires flexibility, core stability, controlled movement, and adequate limb/trunk range. Itassesses thoracic/lumbar rotation, core control, and limb rotation. Prior to the test, examinations such asthoracic rotation, pelvic rotation, and pelvic tilt are necessary. Moreover, the rolling test should be evaluatedin conjunction with selective functional movement assessment (TPI medical2). Before intervening in rollingissues, they're broadly divided into Mobility Dysfunction (MD) and Stability Motor Control Dysfunction (SMCD). A 3-step process called 3R (Reset, Reinforce, Retrain) is used for resolution, enhanced through correctiveexercises. These exercises apply two feedback types: Facilitate, easing movement difficulty, and Challenge,engaging other body parts for core posture adjustments. Results: A 15-year experienced, right-handed professional golfer in his 20s, standing at 188 cm and weighing90 kg, addressed his asymmetry issues. After the evaluation, corrective exercises for pelvic tilting, rotation,and rolling were conducted, resulting in an improvement in clubhead speed from 106 mph to 110 mph. Thisled to enhancements in upper and lower body rolling and improvements in thoracic and pelvic examinations. These outcomes suggest an improvement in the participant's swing mechanics. Conclusion: Athletes may suffer imbalances and injuries due to biased movements and rotations. Unilateralsports athletes, in particular, are prone to spinal injuries as a result of these issues. Symmetry is crucial forhealthy functionality, and the rolling pattern aids in restoring this symmetry. Additionally, evaluating symmetrybetween the upper and lower body, as well as left-right balance, is crucial.
알루미늄 1050계 판재에서 결정립 성장 집합조직에 미치는 재결정 집합조직의 영향
김현철 ( Hyun Chul Kim ),강형구 ( Hyung Gu Kang ),허무영 ( Moo Young Huh ) 대한금속재료학회 ( 구 대한금속학회 ) 2009 대한금속·재료학회지 Vol.47 No.6
In order to vary the primary recrystallization textures, AA 1050 sheets were cold rolled in two different manners. Differences in cold rolling schedule gave rise to the formation of different cold rolling textures also leading to the formation of different primary recrystallization textures. Upon annealing for grain growth, changes in microstructure and texture hardly occurred in the sample depicting Cube recrystallization texture, while grain growth was accompanied with the development {001}<100> Cube texture in the sample displaying a recrystallization texture comprising of weak rolling texture components. The selective growth of Cube oriented grains is attributed to the high mobility of their grain boundaries. (Received January 6, 2009)