scholarly journals Psychophysical Evidence for Spatiotemporal Tuning in Human Motion Sensing Receptive Fields

i-Perception ◽  
10.1068/ic412 ◽  
2011 ◽  
Vol 2 (4) ◽  
pp. 412-412
Author(s):  
George Mather ◽  
Kirsten Challinor
Keyword(s):  
Receptive Fields ◽  
Human Motion ◽  
Motion Sensing ◽  
Spatiotemporal Tuning

A New Hybrid Lead‐Free Metal Halide Piezoelectric for Energy Harvesting and Human Motion Sensing

Small ◽  
2021 ◽  
pp. 2103829
Author(s):  
Tian‐Meng Guo ◽  
Yong‐Ji Gong ◽  
Zhi‐Gang Li ◽  
Yi‐Ming Liu ◽  
Wei Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Human Motion ◽  
Metal Halide ◽  
Lead Free ◽  
Motion Sensing ◽  
Free Metal

scholarly journals Antibacterial, Flexible, and Conductive Membrane Based on MWCNTs/Ag Coated Electro-Spun PLA Nanofibrous Scaffolds as Wearable Fabric for Body Motion Sensing

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 120 ◽  
Author(s):  
Lu Gan ◽  
Aobo Geng ◽  
Ying Wu ◽  
Linjie Wang ◽  
Xingyu Fang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silver Nanoparticles ◽  
Three Dimensional ◽  
Antibacterial Properties ◽  
Human Motion ◽  
Body Motion ◽  
Body Parts ◽  
Motion Sensing ◽  
Nanofibrous Scaffolds ◽  
Conductive Membrane

In the present study, flexible and conductive nanofiber membranes were prepared by coating PLA nanofibrous scaffolds with carbon nanotubes and silver nanoparticles. The morphology and structure of the prepared membrane was characterized, as well as its mechanical properties, electrical sensing behavior during consecutive stretching-releasing cycles and human motion detecting performance. Furthermore, the antibacterial properties of the membrane was also investigated. Due to the synergistic and interconnected three-dimensional (3D) conductive networks, formed by carbon nanotubes and silver nanoparticles, the membrane exhibited repeatable and durable strain-dependent sensitivity. Further, the prepared membrane could accurately detect the motions of different body parts. Accompanied with promising antibacterial properties and washing fastness, the prepared flexible and conductive membrane provides great application potential as a wearable fabric for real-time body motion sensing.

Wi-Fi based passive human motion sensing for in-home healthcare applications

2015 ◽  
Author(s):  
Bo Tan ◽  
Alison Burrows ◽  
Robert Piechocki ◽  
Ian Craddock ◽  
Qingchao Chen ◽  
...  
Keyword(s):  
Human Motion ◽  
Home Healthcare ◽  
Motion Sensing ◽  
Healthcare Applications

Development of IoT Device for Human Motion Sensing

2020 ◽  
Vol 2020 (0) ◽  
pp. 1P1-E01
Author(s):  
Kensuke TAKITA ◽  
Shu ISHIGURO ◽  
Hiroshi YAMAKAWA ◽  
Qi AN ◽  
Hajime ASAMA
Keyword(s):  
Human Motion ◽  
Motion Sensing

scholarly journals Analysis of a Dynamic Calibration Target for Through-Wall and Through-Rubble Motion Sensing Doppler Radar

Instruments ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 37
Author(s):  
Ram M. Narayanan ◽  
Michael J. Harner ◽  
John R. Jendzurski ◽  
Nicholas G. Paulter
Keyword(s):  
Doppler Radar ◽  
Human Motion ◽  
Human Detection ◽  
Dynamic Calibration ◽  
Motion Sensing ◽  
Calibration Target ◽  
Cross Sectional ◽  
Sensing Systems ◽  
Human Respiration ◽  
Field Deployment

Through-wall and through-barrier motion-sensing systems are becoming increasingly important tools to locate humans concealed behind barriers and under rubble. The sensing performance of these systems is best determined with appropriately designed calibration targets, which are ones that can emulate human motion. The effectiveness of various dynamic calibration targets that emulate human respiration, heart rate, and other body motions were analyzed. Moreover, these targets should be amenable to field deployment and not manifest angular or orientation dependences. The three targets examined in this thesis possess spherical polyhedral geometries. Spherical geometries were selected due to their isotropic radar cross-sectional characteristics, which provide for consistent radar returns independent of the orientation of the radar transceiver relative to the test target. The aspect-independence of a sphere allows for more accurate and repeatable calibration of a radar than using a nonspherical calibration artifact. In addition, the radar cross section (RCS) for scattering spheres is well known and can be calculated using far-field approximations. For Doppler radar testing, it is desired to apply these calibration advantages to a dynamically expanding-and-contracting sphere-like device that can emulate motions of the human body. Monostatic RCS simulations at 3.6 GHz were documented for each geometry. The results provide a visual way of representing the effectiveness of each design as a dynamic calibration target for human detection purposes.

scholarly journals Center-surround interactions underlie bipolar cell motion sensing in the mouse retina

2021 ◽  
Author(s):  
Sarah Strauss ◽  
Maria M Korympidou ◽  
Yanli Ran ◽  
Katrin Franke ◽  
Timm Schubert ◽  
...  
Keyword(s):  
Bipolar Cell ◽  
Ganglion Cells ◽  
Receptive Fields ◽  
Amacrine Cells ◽  
Bipolar Cells ◽  
Mouse Retina ◽  
Motion Processing ◽  
Local Motion ◽  
Motion Sensing ◽  
Motion Sensitivity

Motion is a critical aspect of vision. We studied the representation of motion in mouse retinal bipolar cells and found, surprisingly, that some bipolar cells possess motion-sensing capabilities that rely on their center-surround receptive fields. Using a glutamate sensor, we directly observed motion-sensitive bipolar cell synaptic output, which was strongest for local motion and dependent on the motion's origin. We characterized bipolar cell receptive fields and found that there are motion and non-motion sensitive bipolar cell types, the majority being motion sensitive. Next, we used these bipolar cell receptive fields along with connectomics to design biophysical models of downstream cells. The models and experiments demonstrated that bipolar cells pass motion-sensitive excitation to starburst amacrine cells through direction-specific signals mediated by bipolar cells' center-surround receptive field structure. As bipolar cells provide excitation to most amacrine and ganglion cells, their motion sensitivity may contribute to motion processing throughout the visual system.

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