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연속적 능동무릎폄 검사가 뒤넙다리근의 유연성에 미치는 영향
임우택,Lim, Woo Taek 대한물리치료과학회 2021 대한물리치료과학회지 Vol.28 No.1
Background: In clinical practice, active knee extension (AKE) test has been widely used to measure hamstring flexibility. During the AKE test, the knee extension is repeated six times. The first five repetitions are considered as warm-up, and the sixth is used as baseline. In order to accurately measure the subject's inherent flexibility, warm-up trials have been proposed as mentioned above; but currently, the evidence is insufficient. Design: Cross-sectional study. Methods: Forty-three healthy adults participated in this study. The AKE was performed slowly after flexing the hip and knee joints by 90° in a supine position. The knee was extended as far as could be done without causing discomfort or pain. When reaching the end range, knee flexion was performed without stopping. As per standard protocol, the subjects performed the knee extension six times. Results: There was no significant difference between the AKE value in the first trial with those in the other five trials. During the repetitions, the average value in the group with higher flexibility tended to decrease and the Intraclass correlation coefficient gradually decreased. Conclusion: Successive repetitions of the AKE test can misrepresent an individual's inherent hamstring flexibility. In order to avoid a decrease in hamstring flexibility, it is strongly recommended that individuals with high initial hamstring flexibility avoid unnecessary repetitions of the AKE test.
Crystal Structure of Xenon Encapsulate within Na-A Zeolite
임우택,박만,허남호,Im, U Taek,Park, Man,Heo, Nam Ho Korean Chemical Society 2000 Bulletin of the Korean Chemical Society Vol.21 No.1
The positions of Xe atoms encapsulated in the molecular-dimensioned cavities of fully dehydrated Na-A have been determined. Na-A was exposed to 1050atm of xenon gas at 400 $^{\circ}C$ for seven days, followed by cooling at pressure to encapsulate Xe atoms. The resulting crystal structure of Na-A(7Xe) (a = 12.249(1) $\AA$, $R_1$ = 0.065, and $R_2$ = 0.066) were determined by single-crystal X-ray diffraction techniques in the cubic space group Pm3m at 21(1) $^{\circ}C$ and 1 atm. In the crystal structure of Na-A(7Xe), seven Xe atoms per unit cell are distributed over four crystallographically distinct positions: one Xe atom at Xe(1) lies at the center of the sodalite unit, two Xe atoms at Xe(4) are found opposite four-rings in the large cavity, and four Xe atoms, two at Xe(2) and others at Xe(3), respectively, occupy positions opposite and between eight- and six-rings in the large cavity. Relatively strong interactions of Xe atoms at Xe(2) and Xe(3) with $Na^+$ ions of four-, eight-, and six-rings are observed:Na(1)-Xe(2) = 3.09(6), Na(2)-Xe(3) = 3.11(2), and Na(3)-Xe(2) = 3.37(8) $\AA$. In each sodalite unit, one Xe atom is located at its center. In each large cavity, six Xe atoms are found, forming a distorted octahedral arrangement with four Xe atoms, at equatorial positions (each two at Xe(2) and Xe(3)) and the other two at axial positions (at Xe(4)). With various reasonable distances and angles, the existence of $(Xe)_6$ cluster is proposed (Xe(2)-Xe(3) = 4.78(6) and 4.94(7), Xe(2)-Xe(4) = 4.71(6) and 5.06(6), Xe(3)-Xe(4) = 4.11(3) and 5.32(4) $\AA$, Xe(2)-Xe(3)-Xe(2) = 93(1), Xe(3)-Xe(2)-Xe(3) = 87(1), Xe(2)-Xe(4)-Xe(2) = 91(4), Xe(2)-Xe(4)-Xe(3) = 55(2), 59(1), 61(1), and 68(1), and Xe(3)-Xe(4)-Xe(3) = 89($^{\circ}1$)). These arrangements of the encapsulated Xe atoms in the large cavity are stabilized by alternating dipoles induced on Xe(2), Xe(3), and Xe(4) by eight- and six-ring $Na^+$ ions as well as four-ring oxygens, respectively.
임우택 성신여자대학교기초과학연구소 1998 基礎科學硏究誌 Vol.16 No.-
The prupose of this study was to indentify the characteristics of sports policy of the France in its basis sports policy using the sports comparative study method. The results of this study are as follows: 1. sports laws had been accumulated for long time since 1930s and the efforts for the subdivision of the laws and the realistic application of them had been made. 2. The sports organizations of the France had been specialized since 1960s and their policy had been changed from for the early elite sports plicy into for the developmet of mass sports. 3. In the sports policy, France considered the practic of sports as a kind of community educations, endowed all of the French people with the new right and duty of practice the sports, made the preparation of the facilities to practic sports a govemment responsibility, and secured the legal staus of the sports organizations.
모션 캡처 시스템에 대한 고찰: 임상적 활용 및 운동형상학적 변인 측정 중심으로
임우택 한국전문물리치료학회 2022 한국전문물리치료학회지 Vol.29 No.2
To solve the pathological problems of the musculoskeletal system based on evidence, a so-phisticated analysis of human motion is required. Traditional optical motion capture systems with high validity and reliability have been utilized in clinical practice for a long time. However, expensive equipment and professional technicians are required to construct optical motion capture systems, hence they are used at a limited capacity in clinical settings despite their advantages. The development of information technology has overcome the existing limit and paved the way for constructing a motion capture system that can be operated at a low cost. Recently, with the development of computer vision-based technology and optical marker-less tracking technology, webcam-based 3D human motion analysis has become possible, in which the intuitive interface increases the user-friendliness to non-specialists. In addition, unlike conventional optical motion capture, with this approach, it is possible to analyze mo-tions of multiple people at simultaneously. In a non-optical motion capture system, an inertial measurement unit is typically used, which is not significantly different from a conventional optical motion capture system in terms of its validity and reliability. With the development of markerless technology and advent of non-optical motion capture systems, it is a great advan-tage that human motion analysis is no longer limited to laboratories.
임우택,이남기,최봉삼 한국신경근육물리치료학회(구 한국신경근육재활학회) 2016 한국신경근육재활학회지 Vol.6 No.1
Several types of disuse atrophy have been observed in humans. First, skeletal muscle atrophy is commonly observed in patients with spinal cord injury (SCI). Paralysis occurs secondary to a lesion on the upper motor neuron pathway below the level of the lesion. This disruption occurs after SCI and leads to severe muscle atrophy. Second, decreased muscle use after bone fracture increases protein degradation. Lastly, astronauts in space who are away from gravity also experience loss of muscle mass and bone mineral content in space after even a few days of weightlessness. Preventing disuse atrophy of skeletal muscle is key to facilitating recovery and reducing hospitalization. Currently, various disuse models such as immobilization, cordotomy, and hindlimb unloading have been developed to mimic human conditions in clinics. A better understanding of muscle adaptation in animal models can help the development of an effective therapeutic strategy in clinics.
출고빈도별 제품 로케이션 배치에 따른 피킹효율 영향 분석
임우택,박현호,강경식 대한안전경영과학회 2014 대한안전경영과학회지 Vol.16 No.3
During the fierce competition among the companies, improvement of logistics center managing efficiency is importantly recognized. Among them, studies on improvement of picking work process on about 55% of logistics center managing costs are continuously conducted. And, most of studies focus on analysis on strengths and weaknesses of picking method performable on the stage of logistics center design, etc, so the purposes of this research are to define load location rule by product releasing frequency in logistics managing environment based on conveyer and suggest expected effects by simulation analyzing method to improve picking managing efficiency.