The Experts below are selected from a list of 2217 Experts worldwide ranked by ideXlab platform
Tolga Kaya - One of the best experts on this subject based on the ideXlab platform.
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a wearable Conductivity Sensor for wireless real time sweat monitoring
Sensors and Actuators B-chemical, 2016Co-Authors: Cheting Ho, Nate Slappey, Zhixuan Zhou, Samuel Snelgrove, Mark Brown, Alex Grabinski, Y Chen, Kevin C Miller, Jeffrey E Edwards, Tolga KayaAbstract:Abstract We designed, fabricated, and tested a sweat-based Conductivity Sensor device toward a real-time, non-invasive physiological condition monitoring device for humans. Sweat collector, Conductivity Sensor, and the interfacing circuit were developed and combined to form a wearable device. Polydimethylsiloxane (PDMS) based sweat collector was fabricated to collect sweat from skin using the hydraulic pumping action of sweat glands. PDMS sweat collectors were prepared using 3D printed plastic molds. The interfacing circuit was designed based on the results of the Conductivity Sensor that was characterized by the Electrochemical Impedance Spectroscopy. Human testing was performed to prove the feasibility of the proposed sweat sensing system for the real-time non-invasive monitoring of human sweat. The first reading from the device was obtained in 7–20 min depending on the subject and the location of the electrodes. Sweat rate plateaued after a consistent work load of exercise, as was expected. The sweat Conductivity decayed after the first readings due to the initial mineral content of the skin. Finally, an increasing trend in sweat Conductivity was observed which may be due to subjects’ changing hydration level.
John K. Atkinson - One of the best experts on this subject based on the ideXlab platform.
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a novel thick film electrical Conductivity Sensor suitable for liquid and soil Conductivity measurements
Sensors and Actuators B-chemical, 2015Co-Authors: Marios Sophocleous, John K. AtkinsonAbstract:Results are reported from an initial evaluation of a novel Conductivity Sensor that could be incorporated onto a multi-element thick film (screen printed) Sensor array designed for soil and water analysis. The new Sensor exhibits a repeatable cell constant over a wide range of conductivities and is currently performing very well in an investigation of soil structural properties where its output is being correlated with soil water content in a study of different soil porosities.
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A novel thick-film screen printed electrical Conductivity Sensor for measurement of liquid and soil Conductivity
SENSORS 2014 IEEE, 2014Co-Authors: John K. Atkinson, Marios SophocleousAbstract:Results are reported from an initial evaluation of a novel Conductivity Sensor that has been incorporated onto a multi-element thick film Sensor array designed for soil and water analysis. The new Sensor exhibits a more repeatable cell constant of approximately 0.15 cm-1 over a wider range of conductivities compared with Conductivity Sensor designs previously employed in the Sensor array. The new Sensor is currently performing very well in an investigation of soil structural properties where its output is being correlated with soil water content in a study of different soil porosities.
E. V. Thomsen - One of the best experts on this subject based on the ideXlab platform.
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Fish & chips: single chip silicon mems ctdl salinity, temperature, pressure and light Sensor for use in fisheries research
2005Co-Authors: A. Hyldgård, Ole Hansen, E. V. ThomsenAbstract:A single-chip silicon MEMS CTDL multi Sensor for use in aqueous environments is presented. The new Sensor chip consists of a Conductivity Sensor based on platinum electrodes (C), an ion-implanted thermistor temperature Sensor (T), a piezoresistive pressure Sensor (D for depth/pressure) and an ion-implanted p-n junction light Sensor (L). The design and fabrication process is described. A temperature sensitivity of 0.8 × 10-3K-1 has been measured and detailed analysis of Conductivity measurement data shows a cell constant of 81 cm-1.
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Fish and chips: single chip silicon MEMS CTDL salinity, temperature, pressure and light Sensor for use in fisheries research
18th IEEE International Conference on Micro Electro Mechanical Systems 2005. MEMS 2005., 2005Co-Authors: A. Hyldgård, Ole Hansen, E. V. ThomsenAbstract:A single-chip silicon MEMS CTDL multi Sensor for use in aqueous environments is presented. The new Sensor chip consists of a Conductivity Sensor based on platinum electrodes (C), an ion-implanted thermistor temperature Sensor (T), a piezoresistive pressure Sensor (D for depth/pressure) and an ion-implanted p-n junction light Sensor (L). The design and fabrication process is described. A temperature sensitivity of 0.8 /spl times/ 10/sup -3/K/sup -1/ has been measured and detailed analysis of Conductivity measurement data shows a cell constant of 81 cm/sup -1/.
Marios Sophocleous - One of the best experts on this subject based on the ideXlab platform.
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a novel thick film electrical Conductivity Sensor suitable for liquid and soil Conductivity measurements
Sensors and Actuators B-chemical, 2015Co-Authors: Marios Sophocleous, John K. AtkinsonAbstract:Results are reported from an initial evaluation of a novel Conductivity Sensor that could be incorporated onto a multi-element thick film (screen printed) Sensor array designed for soil and water analysis. The new Sensor exhibits a repeatable cell constant over a wide range of conductivities and is currently performing very well in an investigation of soil structural properties where its output is being correlated with soil water content in a study of different soil porosities.
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A novel thick-film screen printed electrical Conductivity Sensor for measurement of liquid and soil Conductivity
SENSORS 2014 IEEE, 2014Co-Authors: John K. Atkinson, Marios SophocleousAbstract:Results are reported from an initial evaluation of a novel Conductivity Sensor that has been incorporated onto a multi-element thick film Sensor array designed for soil and water analysis. The new Sensor exhibits a more repeatable cell constant of approximately 0.15 cm-1 over a wider range of conductivities compared with Conductivity Sensor designs previously employed in the Sensor array. The new Sensor is currently performing very well in an investigation of soil structural properties where its output is being correlated with soil water content in a study of different soil porosities.
Cheting Ho - One of the best experts on this subject based on the ideXlab platform.
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a wearable Conductivity Sensor for wireless real time sweat monitoring
Sensors and Actuators B-chemical, 2016Co-Authors: Cheting Ho, Nate Slappey, Zhixuan Zhou, Samuel Snelgrove, Mark Brown, Alex Grabinski, Y Chen, Kevin C Miller, Jeffrey E Edwards, Tolga KayaAbstract:Abstract We designed, fabricated, and tested a sweat-based Conductivity Sensor device toward a real-time, non-invasive physiological condition monitoring device for humans. Sweat collector, Conductivity Sensor, and the interfacing circuit were developed and combined to form a wearable device. Polydimethylsiloxane (PDMS) based sweat collector was fabricated to collect sweat from skin using the hydraulic pumping action of sweat glands. PDMS sweat collectors were prepared using 3D printed plastic molds. The interfacing circuit was designed based on the results of the Conductivity Sensor that was characterized by the Electrochemical Impedance Spectroscopy. Human testing was performed to prove the feasibility of the proposed sweat sensing system for the real-time non-invasive monitoring of human sweat. The first reading from the device was obtained in 7–20 min depending on the subject and the location of the electrodes. Sweat rate plateaued after a consistent work load of exercise, as was expected. The sweat Conductivity decayed after the first readings due to the initial mineral content of the skin. Finally, an increasing trend in sweat Conductivity was observed which may be due to subjects’ changing hydration level.