The Experts below are selected from a list of 144 Experts worldwide ranked by ideXlab platform
Harry H Asada - One of the best experts on this subject based on the ideXlab platform.
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FingerNail touch sensors: spatially distributed measurement and hemodynamic modeling
Proceedings 2000 ICRA. Millennium Conference. IEEE International Conference on Robotics and Automation. Symposia Proceedings (Cat. No.00CH37065), 2000Co-Authors: Stephen A Mascaro, Harry H AsadaAbstract:Advancements on a new type of touch sensor for detecting contact pressure at human fingertips are presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color when the fingertip is pressed against a surface. The fingerNail sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. Reflectance photoplethysmography is used to measure the pattern of Nail Color, i.e., the blood content under the fingerNail. Hemodynamic modeling, based on actual fingertip anatomy and physiology, is used to investigate the dynamics of the change in blood volume at multiple locations under the fingerNail. An optical model is created to relate the blood volume to the light intensity measured by the photodetectors. The theoretical analysis is verified through model simulation and experimentation using a prototype fingerNail sensor.
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ICRA - FingerNail touch sensors: spatially distributed measurement and hemodynamic modeling
Proceedings 2000 ICRA. Millennium Conference. IEEE International Conference on Robotics and Automation. Symposia Proceedings (Cat. No.00CH37065), 2000Co-Authors: Stephen A Mascaro, Harry H AsadaAbstract:Advancements on a new type of touch sensor for detecting contact pressure at human fingertips are presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color when the fingertip is pressed against a surface. The fingerNail sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. Reflectance photoplethysmography is used to measure the pattern of Nail Color, i.e., the blood content under the fingerNail. Hemodynamic modeling, based on actual fingertip anatomy and physiology, is used to investigate the dynamics of the change in blood volume at multiple locations under the fingerNail. An optical model is created to relate the blood volume to the light intensity measured by the photodetectors. The theoretical analysis is verified through model simulation and experimentation using a prototype fingerNail sensor.
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photo plethysmograph Nail sensors for measuring finger forces without haptic obstruction modeling and experimentation
International Conference on Robotics and Automation, 1999Co-Authors: Stephen A Mascaro, Kuo Wei Chang, Harry H AsadaAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color pattern when the fingertip is pressed against a surface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environment surface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. The finger touch force is detected by measuring changes in the Nail Color, hence the sensor is mounted on the fingerNail rather than on the fingertip. Photo-reflective plethysmography is used to measure the Nail Color. Haemodynamic modeling is used to investigate the dynamics of the change in blood volume under the fingerNail. The model is simulated and then evaluated by comparison with the experimental dynamic response of the sensor. Applications to human-machine interaction are discussed.
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ICRA - Photo-plethysmograph Nail sensors: for measuring finger forces without haptic obstruction: modeling and experimentation
Proceedings 1999 IEEE International Conference on Robotics and Automation (Cat. No.99CH36288C), 1999Co-Authors: Stephen A Mascaro, Kuo Wei Chang, Harry H AsadaAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color pattern when the fingertip is pressed against a surface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environment surface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. The finger touch force is detected by measuring changes in the Nail Color, hence the sensor is mounted on the fingerNail rather than on the fingertip. Photo-reflective plethysmography is used to measure the Nail Color. Haemodynamic modeling is used to investigate the dynamics of the change in blood volume under the fingerNail. The model is simulated and then evaluated by comparison with the experimental dynamic response of the sensor. Applications to human-machine interaction are discussed.
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Instrumented fingerNails: a haptically unobstructive method for touch force input
Telemanipulator and Telepresence Technologies V, 1998Co-Authors: Stephen A Mascaro, Harry H Asada, Kuo Wei ChangAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. FingerNails are instrumented withminiature LEDs and photodetectors in order to measure changes in the Nail Color when the fingers are pressed against asurface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environmentsurface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural hapticsenses. The finger force is detected by measuring changes in the Nail Color; hence the sensor is mounted on the Nail siderather than the finger pad. Photo-reflective plethysmography is used for measuring the Nail Color. A prototype fingerNailsensor and is constructed and used to create a fingertip-free electronic glove. Using these new touch sensors, a novel human-machine interface, termed "virtual switch," is developed and applied to robot programming. The virtual switch detectshuman intention of pressing a switch by measuring the finger touch signal and the hand location. Instead of embedding aphysical switch in a wall or panel, the virtual switch requires merely an image of a switch posted on the surface, and hencecan be placed on any surface where one wants to place switches.Keywords: fingerNails, fingertip, photoplethysmograph, photo-reflective, touch input, touch sensors, touch force, virtualswitch, electronic gloves, haptics
Stephen A Mascaro - One of the best experts on this subject based on the ideXlab platform.
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FingerNail touch sensors: spatially distributed measurement and hemodynamic modeling
Proceedings 2000 ICRA. Millennium Conference. IEEE International Conference on Robotics and Automation. Symposia Proceedings (Cat. No.00CH37065), 2000Co-Authors: Stephen A Mascaro, Harry H AsadaAbstract:Advancements on a new type of touch sensor for detecting contact pressure at human fingertips are presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color when the fingertip is pressed against a surface. The fingerNail sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. Reflectance photoplethysmography is used to measure the pattern of Nail Color, i.e., the blood content under the fingerNail. Hemodynamic modeling, based on actual fingertip anatomy and physiology, is used to investigate the dynamics of the change in blood volume at multiple locations under the fingerNail. An optical model is created to relate the blood volume to the light intensity measured by the photodetectors. The theoretical analysis is verified through model simulation and experimentation using a prototype fingerNail sensor.
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ICRA - FingerNail touch sensors: spatially distributed measurement and hemodynamic modeling
Proceedings 2000 ICRA. Millennium Conference. IEEE International Conference on Robotics and Automation. Symposia Proceedings (Cat. No.00CH37065), 2000Co-Authors: Stephen A Mascaro, Harry H AsadaAbstract:Advancements on a new type of touch sensor for detecting contact pressure at human fingertips are presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color when the fingertip is pressed against a surface. The fingerNail sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. Reflectance photoplethysmography is used to measure the pattern of Nail Color, i.e., the blood content under the fingerNail. Hemodynamic modeling, based on actual fingertip anatomy and physiology, is used to investigate the dynamics of the change in blood volume at multiple locations under the fingerNail. An optical model is created to relate the blood volume to the light intensity measured by the photodetectors. The theoretical analysis is verified through model simulation and experimentation using a prototype fingerNail sensor.
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photo plethysmograph Nail sensors for measuring finger forces without haptic obstruction modeling and experimentation
International Conference on Robotics and Automation, 1999Co-Authors: Stephen A Mascaro, Kuo Wei Chang, Harry H AsadaAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color pattern when the fingertip is pressed against a surface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environment surface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. The finger touch force is detected by measuring changes in the Nail Color, hence the sensor is mounted on the fingerNail rather than on the fingertip. Photo-reflective plethysmography is used to measure the Nail Color. Haemodynamic modeling is used to investigate the dynamics of the change in blood volume under the fingerNail. The model is simulated and then evaluated by comparison with the experimental dynamic response of the sensor. Applications to human-machine interaction are discussed.
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ICRA - Photo-plethysmograph Nail sensors: for measuring finger forces without haptic obstruction: modeling and experimentation
Proceedings 1999 IEEE International Conference on Robotics and Automation (Cat. No.99CH36288C), 1999Co-Authors: Stephen A Mascaro, Kuo Wei Chang, Harry H AsadaAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color pattern when the fingertip is pressed against a surface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environment surface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. The finger touch force is detected by measuring changes in the Nail Color, hence the sensor is mounted on the fingerNail rather than on the fingertip. Photo-reflective plethysmography is used to measure the Nail Color. Haemodynamic modeling is used to investigate the dynamics of the change in blood volume under the fingerNail. The model is simulated and then evaluated by comparison with the experimental dynamic response of the sensor. Applications to human-machine interaction are discussed.
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Instrumented fingerNails: a haptically unobstructive method for touch force input
Telemanipulator and Telepresence Technologies V, 1998Co-Authors: Stephen A Mascaro, Harry H Asada, Kuo Wei ChangAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. FingerNails are instrumented withminiature LEDs and photodetectors in order to measure changes in the Nail Color when the fingers are pressed against asurface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environmentsurface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural hapticsenses. The finger force is detected by measuring changes in the Nail Color; hence the sensor is mounted on the Nail siderather than the finger pad. Photo-reflective plethysmography is used for measuring the Nail Color. A prototype fingerNailsensor and is constructed and used to create a fingertip-free electronic glove. Using these new touch sensors, a novel human-machine interface, termed "virtual switch," is developed and applied to robot programming. The virtual switch detectshuman intention of pressing a switch by measuring the finger touch signal and the hand location. Instead of embedding aphysical switch in a wall or panel, the virtual switch requires merely an image of a switch posted on the surface, and hencecan be placed on any surface where one wants to place switches.Keywords: fingerNails, fingertip, photoplethysmograph, photo-reflective, touch input, touch sensors, touch force, virtualswitch, electronic gloves, haptics
Rucha Tillu - One of the best experts on this subject based on the ideXlab platform.
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Development of a Nail Color scale as a noninvasive tool for predicting hemoglobin in humans
Journal of Public Health, 2009Co-Authors: Vaishal V. Agte, Rucha TilluAbstract:Aim To develop a semi-quantitative Nail Color scale for the prediction of hemoglobin concentration in humans. Subjects and methods A Nail Color scale was developed and used to predict hemoglobin concentrations of 67 children (1 month–10 years), 26 adolescents (11–20 years) and 82 adult men and women (21–60 years). The scale was evaluated by comparing the predicted values with actual hemoglobin concentrations of the subjects estimated by the cyanomethemoglobin method. Results A statistically significant correlation was obtained between the observed and predicted hemoglobin levels (R^2 = 0.77, coefficient = 0.75, intercept = 2.95). In 139 (78.8%) cases the predicted values were between ±10% of the observed values. For the remaining 36 cases (21.2%), 13 showed an underestimation bias and 23 showed an overestimation bias. The Nail Color scale method had sensitivity 67.85%, specificity 93.2% and positive predictive value 0.826. Conclusion The Nail Color scale developed in the study holds promise as a fast, noninvasive, cheap, semi-quantitative hemoglobin estimation method for initial screening of patients for different diseases, particularly anemia.
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development of a Nail Color scale as a noninvasive tool for predicting hemoglobin in humans
Journal of Public Health, 2009Co-Authors: Vaishal V. Agte, Rucha TilluAbstract:Aim To develop a semi-quantitative Nail Color scale for the prediction of hemoglobin concentration in humans.
Vaishal V. Agte - One of the best experts on this subject based on the ideXlab platform.
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Development of a Nail Color scale as a noninvasive tool for predicting hemoglobin in humans
Journal of Public Health, 2009Co-Authors: Vaishal V. Agte, Rucha TilluAbstract:Aim To develop a semi-quantitative Nail Color scale for the prediction of hemoglobin concentration in humans. Subjects and methods A Nail Color scale was developed and used to predict hemoglobin concentrations of 67 children (1 month–10 years), 26 adolescents (11–20 years) and 82 adult men and women (21–60 years). The scale was evaluated by comparing the predicted values with actual hemoglobin concentrations of the subjects estimated by the cyanomethemoglobin method. Results A statistically significant correlation was obtained between the observed and predicted hemoglobin levels (R^2 = 0.77, coefficient = 0.75, intercept = 2.95). In 139 (78.8%) cases the predicted values were between ±10% of the observed values. For the remaining 36 cases (21.2%), 13 showed an underestimation bias and 23 showed an overestimation bias. The Nail Color scale method had sensitivity 67.85%, specificity 93.2% and positive predictive value 0.826. Conclusion The Nail Color scale developed in the study holds promise as a fast, noninvasive, cheap, semi-quantitative hemoglobin estimation method for initial screening of patients for different diseases, particularly anemia.
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development of a Nail Color scale as a noninvasive tool for predicting hemoglobin in humans
Journal of Public Health, 2009Co-Authors: Vaishal V. Agte, Rucha TilluAbstract:Aim To develop a semi-quantitative Nail Color scale for the prediction of hemoglobin concentration in humans.
Kuo Wei Chang - One of the best experts on this subject based on the ideXlab platform.
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photo plethysmograph Nail sensors for measuring finger forces without haptic obstruction modeling and experimentation
International Conference on Robotics and Automation, 1999Co-Authors: Stephen A Mascaro, Kuo Wei Chang, Harry H AsadaAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color pattern when the fingertip is pressed against a surface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environment surface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. The finger touch force is detected by measuring changes in the Nail Color, hence the sensor is mounted on the fingerNail rather than on the fingertip. Photo-reflective plethysmography is used to measure the Nail Color. Haemodynamic modeling is used to investigate the dynamics of the change in blood volume under the fingerNail. The model is simulated and then evaluated by comparison with the experimental dynamic response of the sensor. Applications to human-machine interaction are discussed.
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ICRA - Photo-plethysmograph Nail sensors: for measuring finger forces without haptic obstruction: modeling and experimentation
Proceedings 1999 IEEE International Conference on Robotics and Automation (Cat. No.99CH36288C), 1999Co-Authors: Stephen A Mascaro, Kuo Wei Chang, Harry H AsadaAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. A fingerNail is instrumented with miniature LEDs and photodetectors in order to measure changes in the Nail Color pattern when the fingertip is pressed against a surface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environment surface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural haptic senses. The finger touch force is detected by measuring changes in the Nail Color, hence the sensor is mounted on the fingerNail rather than on the fingertip. Photo-reflective plethysmography is used to measure the Nail Color. Haemodynamic modeling is used to investigate the dynamics of the change in blood volume under the fingerNail. The model is simulated and then evaluated by comparison with the experimental dynamic response of the sensor. Applications to human-machine interaction are discussed.
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Instrumented fingerNails: a haptically unobstructive method for touch force input
Telemanipulator and Telepresence Technologies V, 1998Co-Authors: Stephen A Mascaro, Harry H Asada, Kuo Wei ChangAbstract:A new type of touch sensor for detecting contact pressure at human fingertips is presented. FingerNails are instrumented withminiature LEDs and photodetectors in order to measure changes in the Nail Color when the fingers are pressed against asurface. Unlike traditional electronic gloves, in which sensor pads are placed between the fingers and the environmentsurface, this new sensor allows the fingers to directly contact the environment without obstructing the human's natural hapticsenses. The finger force is detected by measuring changes in the Nail Color; hence the sensor is mounted on the Nail siderather than the finger pad. Photo-reflective plethysmography is used for measuring the Nail Color. A prototype fingerNailsensor and is constructed and used to create a fingertip-free electronic glove. Using these new touch sensors, a novel human-machine interface, termed "virtual switch," is developed and applied to robot programming. The virtual switch detectshuman intention of pressing a switch by measuring the finger touch signal and the hand location. Instead of embedding aphysical switch in a wall or panel, the virtual switch requires merely an image of a switch posted on the surface, and hencecan be placed on any surface where one wants to place switches.Keywords: fingerNails, fingertip, photoplethysmograph, photo-reflective, touch input, touch sensors, touch force, virtualswitch, electronic gloves, haptics
