• 대한족부족관절학회지
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• 제19권4호
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• pp.165-170
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• 2015

Purpose: The purpose of this study is to analyze the measurement differences of simple radiographs according to radiation projection angle using a phantom and to propose methods for objective analysis of simple radiographs. Materials and Methods: We took simple radiographs with different projection angles using a C-arm image intensifier and measured five parameters of the foot on the simple radiographic images. Five parameters include lateral tibiocalcaneal angle, lateral talocalcaneal angle, naviculocuboid overlap, lateral talo-first metatarsal angle, and lateral calcaneo-first metatarsal angle. Intraobserver and interobserver reliability were verified, and then intraclass correlations of parameters were analyzed. Results: Radiographic parameters of the foot showed high intraobserver and interobserver reliability. Lateral tibiocalcaneal angle has a strong negative linear relationship with rotation and a moderate negative linear relationship with tilt. Lateral talocalcaneal angle has a moderate positive linear relationship with rotation and a strong positive linear relationship with tilt. Naviculocuboid overlap has a strong positive linear relationship with rotation and a moderate positive linear relationship with tilt. Lateral talo-first metatarsal angle does not have a linear relationship with rotation and a moderate negative linear relationship with tilt. Lateral calcaneo-first metatarsal angle has a moderate positive linear relationship with rotation and tilt. Conclusion: More precise evaluation of the foot with a simple radiograph can be performed by understanding the changes of radiographic parameters according to radiation projection angle.

• 재활치료과학
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• 제10권1호
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• pp.129-140
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• 2021

목적 : 본 연구는 뇌졸중 환자가 한손 및 양손 활동을 수행하는 동안 가속도 측정을 통해 건측 및 환측, 위팔 및 아래팔의 활동량을 비교하여 일상생활활동의 정량적 측정도구로써 가속도계의 활용가능성을 제시하고자 한다. 연구방법 : 2017년 9월부터 11월까지 우측 편마비 환자 10명과 좌측 편마비 환자 10명을 대상으로 한손 활동과 양손 활동을 실시하였다. 한손 활동은 마시기로 건측과 환측을 따로 측정하였고, 양손 활동은 옷입기로 건측과 환측을 동시에 측정하였다. 삼축 가속도계를 위팔의 가쪽 위관절융기 아래 지점, 아래팔의 노뼈붓돌기 아래 지점에 착용하여 수행시간과 활동량을 측정하였다. 각 3회씩 반복 측정하여 평균값을 사용하였다. 결과 :　우측 편마비 환자에서는 양손 활동 수행 시 아래팔에서만 건측의 활동량이 유의하게 많았고(p<.05), 전체 활동에서 위팔보다 아래팔의 활동량이 유의하게 많았다(p<.01, p<.05). 좌측 편마비 환자에서 한손 활동과 양손 활동 수행 시 모두 환측과 건측의 활동량에 유의한 차이가 없었다(p>.05). 양손 활동 시 환측을 제외한 모든 활동에서 건측 및 환측의 위팔보다 아래팔의 활동량이 유의하게 많았다(p<.05). 전체 환자에서 양손 활동 수행 시 건측의 위팔과 아래팔의 활동량이 유의하게 많았고(p<.05), 전체 활동에서 위팔보다 아래팔의 활동량이 유의하게 많았다(p<.001, p<.05). 결론 : 삼축 가속도계로 위팔 및 아래팔의 활동량을 측정한 결과, 한손 및 양손 활동 수행 시 아래팔의 활동량이 위팔보다 많았고, 양손 활동 수행 시에는 건측의 활동량이 더 많았다.

• 한국컴퓨터정보학회논문지
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• 제25권1호
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• pp.109-115
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• 2020

어깨는 인간의 몸통과 양팔을 연결하는 부위를 말하며, 양팔을 움직이는데 핵심적인 역할을 한다. 특히 양손을 머리의 뒤쪽으로 보내거나 우리 몸으로부터 멀리 보내는데 가장 중요한 역할을 수행한다. 본 논문에서는 어깨에서 팔의 안쪽 돌림과 가쪽 돌림에 대하여 각도를 측정하고, 이상 유무와 관련된 증상을 파악하며, 이러한 증상을 예방하는 방법까지 제시하도록 한다. 어깨에서 팔의 안쪽돌림과 가쪽 돌림의 각도는 70°~90°가 일반적이다. 그리고 각도가 이에 못 미치거나 통증을 느끼면 어깨에 이상이 생긴 것이다. 또한 일반인 남녀 각각 50명씩 총 100명을 대상으로 실험을 수행하여 이상이 있는 환자를 판별하였다.

• Clinics in Shoulder and Elbow
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• 제6권1호
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• pp.50-54
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• 2003

Object: To evaluate the efficiencies of the arthroscopic rotator cuff surgery which is Performed without the traction system in the lateral decubitus position. Methods: Twenty-nine cases of the arthroscopic rotator cuff surgery performed without the traction system in the lateral decubitus position were studied from February, 2002 to January, 2005. We performed a repair using the arthroscopic debridement and the arthroscopic rotator cuff repair, or using the mini-open incision technique after the confirmation of rotator cuff tear, then, the arthroscopic subacromial decompression was performed after the confirmation of subacromial lesions Results: We could easily find the subscapularis tear which was often overlooked in the arthroscopic rotator cuff surgery performed with the traction surgery by the relaxation of the subscapularis, as the arm position was internally rotate about 45 to 70 degrees from abducted position. We found that the operation time was reduced 14 minutes shorter than the operation time of the controlled group which had the surgery with the traction system on the average. We also found that there were no neurovascular complications from all cases. Conclusions: The arthroscopic rotator cuff surgery without traction system in the lateral decubitus position provided the better visual field, easy manipulation of the joint and reducing operation time.

• Geomechanics and Engineering
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• 제19권1호
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• pp.79-91
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• 2019

Renewed interest in the long-term pile foundations has been driven by the increase in offshore wind turbine installation to generate renewable energy. A monopile subjected to repetitive loads experiences an evolution of displacements, pile rotation, and stress redistribution along the embedded portion of the pile. However, it is not fully understood how the embedded pile interacts with the surrounding soil elements based on different pile geometries. This study investigates the long-term soil response around offshore monopiles using finite element method. The semi-empirical numerical approach is adopted to account for the fundamental features of volumetric strain (terminal void ratio) and shear strain (shakedown and ratcheting), the strain accumulation rate, and stress obliquity. The model is tested with different strain boundary conditions and stress obliquity by relaxing four model parameters. The parametric study includes pile diameter, embedded length, and moment arm distance from the surface. Numerical results indicate that different pile geometries produce a distinct evolution of lateral displacement and stress. In particular, the repetitive lateral load increases the global lateral load resistance. Further analysis provides insight into the propagation of the shear localization from the pile tip to the ground surface.

• 한국운동역학회지
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• 제24권1호
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• pp.43-50
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• 2014

The purpose of this study was to analyze of the GRF (ground reaction force) parameters according to the change of positions and weights of bag during downward stairs between dominant and non-dominant in upper & lower limbs. To perform this study, participants were selected 9 healthy women (age: $21.40{\pm}0.94yrs$, height: $166.50{\pm}2.68cm$, body mass: $57.00{\pm}3.61kg$, BMI: $20.53{\pm}1.03kg/m^2$), divided into 2 carrying bag positions (dominant arm/R, non-dominant arm/L) and walked with 3 type of bag weights (0, 3, 5 kg) respectively. One force-plate was used to collect GRF (AMTI OR6-7) data at a sample rate of 1000 Hz. The variables analyzed were consisted of the medial-lateral GRF (Fx), anterior-posterior GRF (Fy), vertical GRF (Fz), impact loading rate and center of pressure (COPx, COPy, COP area, COPy posterior peak time) during downward stairs. 1) The Fx, Fy, Fz, COPx, and COP area of GRF were not statistically significant between dominant leg and non-dominant leg, but non-dominant leg, that is, showed the higher COPy, and showed higher impact loading rate than that dominant leg during downward stairs. 2) In bag wearing to non-dominant arm, Fx, Fz, COPx, COPy, impact loading rate and COP area showed increase tendency according to increase of bag weights. Also, against bag wearing to dominant arm, non-dominant showed different mechanism according to increase of bag weights. The Ground Reaction Force parameters showed different characteristics according to the positions and weights of bag during downward stairs between dominant and non-dominant arm.

• Journal of Chest Surgery
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• 제12권3호
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• pp.174-182
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• 1979

This is a report on four cases of successful surgical correction of coarctation of the aorta [COA] in Department of the Thoracic & Cardiovascular Surgery, Hanyang University Hospital. The first case was a postductal type of coarctation of the aorta associated with Patent ductus arteriosus [PDA], Persistent left superior vena cava [LSVC] and richly developed collateral circulation. Blood pressure was measured to be hypertensive at the arm, but hypotensive at the legs. The coarctation of the aorta was corrected with following procedure: Partial resection of the aortic wall with diaphragmatic structure lust above and below the coarctating line of the aorta, and then the defect of the aortic wall was closed by lateral aortographic suture. PDA was closed by ligation procedure. The second case a preductal type of coarctation of the aorta associated with PDA, LSVC, ventricular septal defect [VSD] and poorly developed collateral circulation. Normal blood pressure was measured at the arm, but hypotension was observed at the legs. Correction of coarctation of the aorta was performed under the establishment of tube bypass because of poor collateral circulation. After resection of coarctating short segment, end to end anastomosis was performed without any tension. PDA was closed by division procedure. Simple suture closure of VSD was performed by open heart surgery two weeks after correction of COA. The third case was a long segment COA without any other anomaly. Blood pressure was measured to be hypertensive at the arm, but hypotensive at the legs. Vascular prosthesis was performed using Teflon graft tube after resecting coarctating long segment [6.5 cm] of the aorta. The fourth case was a long segment COA associated with aortic insufficiency and richly developed collateral circulation. Normal blood pressure was measured at the arm, but hypotension was observed at the legs. Vascular prosthesis was performed using Teflon graft tube after resecting coarctating long segment [6.0 cm] of the aorta. Both blood pressure and peripheral pulse on the arm and the legs returned to normal postoperatively in all patients.

• 복식문화연구
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• 제13권3호
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• pp.439-451
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• 2005

This study was to provide the fundamental data for the ease necessary to design clothes by investigating the variation of the upper body surface with the method of surgical tape. The subject were 8 young women in the standard somatotype. In the form of body surface according to arm movements, the shape of armscye circumference became gentle from the sunken form for the standing posture; scye depth became lower; lateral shoulder moved and rose toward the front center as the angle of arm movement became larger; scye depth is greatest in the standing. The items of horizontal ware largest in the standing posture except for front neck base circumference and front interscye breadth for side $90^{\circ}$ movement. In the items of vertical, while most of the front items increased but back ones generally decreased for all movement compared to the standing. After comparing differences in actual values between the form of body surface in the standing posture and the direct measurement, the following ease were suggested considering minimum measures to accommodate daily movements. Bust circumference/2 = 3cm; waist circumference/2 = 1.5cm; front interscye breadth/2 = 0.6cm; back interscye breadth/2 = 0.6cm; and underarm depth = 1.5cm

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1998년도 추계학술대회
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• pp.125-126
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• 1998

Pulse conduction velocity is determined by areterial compliance, which is changed by lateral pressure of arterial wall. Hydrostatic pressure of the limb vessel is changed by body position, especially in elevated arm. The arterial pulse in the finger causes the blood volume to change, changing the optical density of the blood. Photoplethysmograph of index finger was obtained by LED and phototransistor. Pulse transmission time(PTT) was measured by the interval between the peak of ECG R wave and the peak of the finger plethysmogram. PTT was increased by upward position of arm, and decreased by downward position of the arm compared to horizontal position. This result suggests that relationship between finger plethysmography and postural change could be applied to evaluate clinical cardiovascular status.

• 한국전문물리치료학회지
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• 제18권1호
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• pp.28-36
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• 2011

The aim of this study was to compare electromyography activity for long and lateral heads of triceps brachii muscle according to forearm positions during different triceps strengthening exercises. The muscle activities for long and lateral head of triceps brachii were measured by surface electromyography. Fifteen healthy volunteers participated for this study and performed elbow extension in three different elbow extension exercises (elbow extension in a supine position; EES, elbow extension with shoulder abduction at 90 degrees in a prone position; EESA, and elbow extension with one arm at the side of the trunk in a prone position; EESP) and forearm positions (supination, neutral, and pronation). A two-way repeated measures ANOVA was used to compare the effects of the exercise positions and forearm positions. The EMG activities of the long head of the triceps brachii increased significantly during EESP with forearm supination, whereas the activity of the lateral head of the triceps brachii increased significantly during EESA with the forearm in a neutral position (p<.05). The results of this study suggest that exercise positions and forearm positions should be considered for selectively strengthening the long and lateral heads of triceps brachii muscles.