The Experts below are selected from a list of 1167 Experts worldwide ranked by ideXlab platform
M. Hashimoto - One of the best experts on this subject based on the ideXlab platform.
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Inhibitory connections between neural oscillators for a robotic suit
Proceedings - IEEE International Conference on Robotics and Automation, 2011Co-Authors: Xiang Zhang, M. HashimotoAbstract:A new synchronization-based control is proposed for a robotic suit which is designed for walking assistance. Neural oscillators are connected to each joint of the robotic suit to synchronize suit's movement with human user's movement (outer-synchronization). At the same time, mutual inhibition is incorporated between neural oscillators at each left and right joint of the suit to help to maintain a human-gait-like anti-phase relationship (inner-inhibition). We have developed a 2-DOF robotic suit, which consists of two actuators fixed to the places where the human hip joints are. Each actuator has a built-in torque sensor, which helps to measure the mutual joint torque generated by once there is any difference between the movement of a user and that of the suit. The mutual joint torque is used as input to neural oscillators, which control each actuator of the robotic suit through outer-synchronization with the mutual joint torque and inner-inhibition. The inhibitory weight, used to adjust the inhibitory strength between neural oscillators, is designed properly using series of simulations. We have conducted walking experiments to show the validity of our proposal for walking assistance of the robotic suit with mutual inhibition between neural oscillators.
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Synchronization-based trajectory generation method for a robotic suit using neural oscillators for hip joint support in walking
Mechatronics, 2011Co-Authors: Xiang Zhang, M. HashimotoAbstract:A new synchronization-based trajectory generation method is proposed for a robotic suit that is designed to assist walking by supporting the hip joints. Neural oscillators are connected to each hip joint of the robotic suit to synchronize the suit's movement with the human user's movement (outer synchronization). At the same time, mutual inhibition is incorporated between the neural oscillators on the left and right hip joints of the suit to help maintain a human-gait-like anti-phase relationship (inner inhibition). We developed a two-degree-of-freedom robotic suit, which consists of two actuators located where the human hip joints are. Each actuator has a built-in torque sensor, which measures the mutual joint torque generated if any difference arises between the movement of a user and that of the suit. The mutual joint torque serves as input to neural oscillators, which control each actuator of the robotic suit through outer synchronization with the mutual joint torque and inner inhibition. The inhibitory weight, used to adjust the inhibitory strength between neural oscillators, is designed in a series of simulations. We conducted walking experiments to show the validity of our proposal for walking assistance of the robotic suit with mutual inhibition between neural oscillators. © 2011 Elsevier Ltd. All rights reserved.
P J Ell - One of the best experts on this subject based on the ideXlab platform.
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clinical high resolution skeletal single photon emission tomography using a triple headed gamma camera
British Journal of Radiology, 1993Co-Authors: J R Buscombe, Caroline E Townsend, K Kouris, G Clarke, S Mahmood, P H Jarritt, P J EllAbstract:Abstract Planar skeletal scintigraphy has become established as a standard diagnostic test performed within the nuclear medicine department. Since the 1970s good quality images have been produced using an Anger gamma camera and 99Tcm-labelled diphosphonates. Single photon emission tomography (SPET) has improved the sensitivity of detection and the ability to localize bony pathology, particularly benign bone disease in the spine. Recently multi-detector gamma cameras dedicated to SPET have become available. One such system, the Toshiba GCA-9300A, has been used to perform routine clinical skeletal SPET in 81 patients. Good quality images have been obtained using an 8 min acquisition in the axial skeleton and a 16min acquisition protocol in the peripheral skeleton. Multiple sites can be tomographed in the same patient during the same examination using two or more 8 min acquisitions. Such a multi-detector gamma camera offers advantages over the standard single-headed rotating camera for skeletal SPET in terms...
Xiang Zhang - One of the best experts on this subject based on the ideXlab platform.
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Inhibitory connections between neural oscillators for a robotic suit
Proceedings - IEEE International Conference on Robotics and Automation, 2011Co-Authors: Xiang Zhang, M. HashimotoAbstract:A new synchronization-based control is proposed for a robotic suit which is designed for walking assistance. Neural oscillators are connected to each joint of the robotic suit to synchronize suit's movement with human user's movement (outer-synchronization). At the same time, mutual inhibition is incorporated between neural oscillators at each left and right joint of the suit to help to maintain a human-gait-like anti-phase relationship (inner-inhibition). We have developed a 2-DOF robotic suit, which consists of two actuators fixed to the places where the human hip joints are. Each actuator has a built-in torque sensor, which helps to measure the mutual joint torque generated by once there is any difference between the movement of a user and that of the suit. The mutual joint torque is used as input to neural oscillators, which control each actuator of the robotic suit through outer-synchronization with the mutual joint torque and inner-inhibition. The inhibitory weight, used to adjust the inhibitory strength between neural oscillators, is designed properly using series of simulations. We have conducted walking experiments to show the validity of our proposal for walking assistance of the robotic suit with mutual inhibition between neural oscillators.
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Synchronization-based trajectory generation method for a robotic suit using neural oscillators for hip joint support in walking
Mechatronics, 2011Co-Authors: Xiang Zhang, M. HashimotoAbstract:A new synchronization-based trajectory generation method is proposed for a robotic suit that is designed to assist walking by supporting the hip joints. Neural oscillators are connected to each hip joint of the robotic suit to synchronize the suit's movement with the human user's movement (outer synchronization). At the same time, mutual inhibition is incorporated between the neural oscillators on the left and right hip joints of the suit to help maintain a human-gait-like anti-phase relationship (inner inhibition). We developed a two-degree-of-freedom robotic suit, which consists of two actuators located where the human hip joints are. Each actuator has a built-in torque sensor, which measures the mutual joint torque generated if any difference arises between the movement of a user and that of the suit. The mutual joint torque serves as input to neural oscillators, which control each actuator of the robotic suit through outer synchronization with the mutual joint torque and inner inhibition. The inhibitory weight, used to adjust the inhibitory strength between neural oscillators, is designed in a series of simulations. We conducted walking experiments to show the validity of our proposal for walking assistance of the robotic suit with mutual inhibition between neural oscillators. © 2011 Elsevier Ltd. All rights reserved.
J R Buscombe - One of the best experts on this subject based on the ideXlab platform.
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clinical high resolution skeletal single photon emission tomography using a triple headed gamma camera
British Journal of Radiology, 1993Co-Authors: J R Buscombe, Caroline E Townsend, K Kouris, G Clarke, S Mahmood, P H Jarritt, P J EllAbstract:Abstract Planar skeletal scintigraphy has become established as a standard diagnostic test performed within the nuclear medicine department. Since the 1970s good quality images have been produced using an Anger gamma camera and 99Tcm-labelled diphosphonates. Single photon emission tomography (SPET) has improved the sensitivity of detection and the ability to localize bony pathology, particularly benign bone disease in the spine. Recently multi-detector gamma cameras dedicated to SPET have become available. One such system, the Toshiba GCA-9300A, has been used to perform routine clinical skeletal SPET in 81 patients. Good quality images have been obtained using an 8 min acquisition in the axial skeleton and a 16min acquisition protocol in the peripheral skeleton. Multiple sites can be tomographed in the same patient during the same examination using two or more 8 min acquisitions. Such a multi-detector gamma camera offers advantages over the standard single-headed rotating camera for skeletal SPET in terms...
Caroline M Pond - One of the best experts on this subject based on the ideXlab platform.
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the effects of feeding Suet enriched chow on site specific differences in the composition of triacylglycerol fatty acids in adipose tissue and its interactions in vitro with lymphoid cells
British Journal of Nutrition, 1997Co-Authors: Christine A Mattacks, Caroline M PondAbstract:The effects of diet on the composition and properties of adipose tissue in relation to lymph nodes were studied in adult guinea-pigs. The proportions of monoenoic triacylglycerol fatty acids were constant in all sites in adipose tissue of similarly fed guinea-pigs, but were substantially greater in samples from guinea-pigs fed on Suet-enriched chow. Triacylglycerols in adipose tissue from near nodes contained significantly fewer saturated fatty acids, and significantly more 18:2n-6 and 18:3n-3 than those in samples from sites remote from nodes within the same depot. Depots that interact most strongly with lymphoid cells in vitro had the largest and most consistent within-depot differences. The gradients of triacylglycerol fatty acid composition with distance from lymph nodes in two small intermuscular depots were similar in guinea-pigs fed on plain or Suet-enriched chow. These findings are consistent with the hypothesis that adipase tissue around lymph nodes is specialized for ld interactions with the lymphoid ceUs therein, and help to explain the variabflty of serial or duplicate measurements of adipose tissue composition. When cultured alone, lipopolymxharide-stimulated lymph node lymphoid celk from Suet-fed guinea-pigs incorporated as much labelled thymidine as the controls. Adipose tissue explants from Suet-fed guinea-pigs inhibited lymphocyte proliferation much less than those of the controls, although the site-specific differences were similar. The pattern of site-specific differences in glycerol released from explants incubated alone WM generally similar for both dietary groups, but except in the popliteal depot, the increases following co-culturing with lymphoid cells were smaller for samples from Suet-fed guinea-pigs. These experiments show that minor changes in the fatty acid composition of the diet can substantially alter the interactions between adipose tissue and lymphoid cells. Dietary fatty acids: Adipose tissue: Lymph nodes: Guinea-pig
