The Experts below are selected from a list of 11523 Experts worldwide ranked by ideXlab platform
William Lindsay Walter - One of the best experts on this subject based on the ideXlab platform.
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The Kinematic Relationship between sitting and standing posture and pelvic inclination and its significance to cup positioning in total hip arthroplasty
International Orthopaedics, 2015Co-Authors: Andrew Stephens, Selin Munir, Siddarth Shah, William Lindsay WalterAbstract:Purpose The aim of this study is to describe the influence of sitting and standing posture on sagittal pelvic inclination in total hip replacement patients to assist with correct acetabular component positioning. Methods Lateral radiographs of the pelvis and lumbar spine in sitting and standing positions were extracted. Pelvic tilt was measured using the vertical inclination of a line from the anterior superior iliac spine (ASIS) to pubic tubercle. Sacral inclination, Cobb angle of the lumbar spine and hip flexion were recorded. Results Sixty patients were identified with a mean age of 63. Men were more likely to flex the lumbar spine in sitting ( p = 0.004); 80° of hip flexion is required for seated posture. Stiff hips required compensatory pelvic flexion and lumbar flexion in sitting. There is a linear Relationship between hip flexion and pelvic tilt, hip flexion and lumbar lordosis. Conclusions Pelvic orientation is determined by lumbar and hip stiffness. This impacts on acetabular version.
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the Kinematic Relationship between sitting and standing posture and pelvic inclination and its significance to cup positioning in total hip arthroplasty
International Orthopaedics, 2015Co-Authors: Andrew Stephens, Selin Munir, Siddarth Shah, William Lindsay WalterAbstract:Purpose The aim of this study is to describe the influence of sitting and standing posture on sagittal pelvic inclination in total hip replacement patients to assist with correct acetabular component positioning.
Andrew Stephens - One of the best experts on this subject based on the ideXlab platform.
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The Kinematic Relationship between sitting and standing posture and pelvic inclination and its significance to cup positioning in total hip arthroplasty
International Orthopaedics, 2015Co-Authors: Andrew Stephens, Selin Munir, Siddarth Shah, William Lindsay WalterAbstract:Purpose The aim of this study is to describe the influence of sitting and standing posture on sagittal pelvic inclination in total hip replacement patients to assist with correct acetabular component positioning. Methods Lateral radiographs of the pelvis and lumbar spine in sitting and standing positions were extracted. Pelvic tilt was measured using the vertical inclination of a line from the anterior superior iliac spine (ASIS) to pubic tubercle. Sacral inclination, Cobb angle of the lumbar spine and hip flexion were recorded. Results Sixty patients were identified with a mean age of 63. Men were more likely to flex the lumbar spine in sitting ( p = 0.004); 80° of hip flexion is required for seated posture. Stiff hips required compensatory pelvic flexion and lumbar flexion in sitting. There is a linear Relationship between hip flexion and pelvic tilt, hip flexion and lumbar lordosis. Conclusions Pelvic orientation is determined by lumbar and hip stiffness. This impacts on acetabular version.
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the Kinematic Relationship between sitting and standing posture and pelvic inclination and its significance to cup positioning in total hip arthroplasty
International Orthopaedics, 2015Co-Authors: Andrew Stephens, Selin Munir, Siddarth Shah, William Lindsay WalterAbstract:Purpose The aim of this study is to describe the influence of sitting and standing posture on sagittal pelvic inclination in total hip replacement patients to assist with correct acetabular component positioning.
Siddarth Shah - One of the best experts on this subject based on the ideXlab platform.
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The Kinematic Relationship between sitting and standing posture and pelvic inclination and its significance to cup positioning in total hip arthroplasty
International Orthopaedics, 2015Co-Authors: Andrew Stephens, Selin Munir, Siddarth Shah, William Lindsay WalterAbstract:Purpose The aim of this study is to describe the influence of sitting and standing posture on sagittal pelvic inclination in total hip replacement patients to assist with correct acetabular component positioning. Methods Lateral radiographs of the pelvis and lumbar spine in sitting and standing positions were extracted. Pelvic tilt was measured using the vertical inclination of a line from the anterior superior iliac spine (ASIS) to pubic tubercle. Sacral inclination, Cobb angle of the lumbar spine and hip flexion were recorded. Results Sixty patients were identified with a mean age of 63. Men were more likely to flex the lumbar spine in sitting ( p = 0.004); 80° of hip flexion is required for seated posture. Stiff hips required compensatory pelvic flexion and lumbar flexion in sitting. There is a linear Relationship between hip flexion and pelvic tilt, hip flexion and lumbar lordosis. Conclusions Pelvic orientation is determined by lumbar and hip stiffness. This impacts on acetabular version.
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the Kinematic Relationship between sitting and standing posture and pelvic inclination and its significance to cup positioning in total hip arthroplasty
International Orthopaedics, 2015Co-Authors: Andrew Stephens, Selin Munir, Siddarth Shah, William Lindsay WalterAbstract:Purpose The aim of this study is to describe the influence of sitting and standing posture on sagittal pelvic inclination in total hip replacement patients to assist with correct acetabular component positioning.
Selin Munir - One of the best experts on this subject based on the ideXlab platform.
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The Kinematic Relationship between sitting and standing posture and pelvic inclination and its significance to cup positioning in total hip arthroplasty
International Orthopaedics, 2015Co-Authors: Andrew Stephens, Selin Munir, Siddarth Shah, William Lindsay WalterAbstract:Purpose The aim of this study is to describe the influence of sitting and standing posture on sagittal pelvic inclination in total hip replacement patients to assist with correct acetabular component positioning. Methods Lateral radiographs of the pelvis and lumbar spine in sitting and standing positions were extracted. Pelvic tilt was measured using the vertical inclination of a line from the anterior superior iliac spine (ASIS) to pubic tubercle. Sacral inclination, Cobb angle of the lumbar spine and hip flexion were recorded. Results Sixty patients were identified with a mean age of 63. Men were more likely to flex the lumbar spine in sitting ( p = 0.004); 80° of hip flexion is required for seated posture. Stiff hips required compensatory pelvic flexion and lumbar flexion in sitting. There is a linear Relationship between hip flexion and pelvic tilt, hip flexion and lumbar lordosis. Conclusions Pelvic orientation is determined by lumbar and hip stiffness. This impacts on acetabular version.
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the Kinematic Relationship between sitting and standing posture and pelvic inclination and its significance to cup positioning in total hip arthroplasty
International Orthopaedics, 2015Co-Authors: Andrew Stephens, Selin Munir, Siddarth Shah, William Lindsay WalterAbstract:Purpose The aim of this study is to describe the influence of sitting and standing posture on sagittal pelvic inclination in total hip replacement patients to assist with correct acetabular component positioning.
Yoichi Hori - One of the best experts on this subject based on the ideXlab platform.
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Traction Control for EV Based on Maximum Transmissible Torque Estimation
International Journal of Intelligent Transportation Systems Research, 2010Co-Authors: Yoichi HoriAbstract:Research on motion control of EVs has progressed considerably, but traction control has not been so sophisticated and practical because the velocity of vehicles and the friction force are immeasurable. This work takes advantage of the features of driving motors to estimate the maximum transmissible torque output in real time based on a purely Kinematic Relationship, and then proposes an innovative controller to follow the estimated value directly and constrain the torque reference for slip prevention. By comparison with prior control methods, the resulting control design approach is shown to be more effective and robust both in simulation and on an experimental EV.
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a novel traction control for ev based on maximum transmissible torque estimation
IEEE Transactions on Industrial Electronics, 2009Co-Authors: Sehoon Oh, Yoichi HoriAbstract:Controlling an immeasurable state with an indirect control input is a difficult problem faced in traction control of vehicles. Research on motion control of electric vehicles (EVs) has progressed considerably, but traction control has not been so sophisticated and practical because of this difficulty. Therefore, this paper takes advantage of the features of driving motors to estimate the maximum transmissible torque output in real time based on a purely Kinematic Relationship. An innovative controller that follows the estimated value directly and constrains the torque reference for slip prevention is then proposed. By analysis and comparison with prior control methods, the resulting control design approach is shown to be more effective and more practical, both in simulation and on an experimental EV.
