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Contrast Adaptation In The Lateral Eye Of Limulus Polyphemus, Tchoudomira Valtcheva
Contrast Adaptation In The Lateral Eye Of Limulus Polyphemus, Tchoudomira Valtcheva
USF Tampa Graduate Theses and Dissertations
Luminance and contrast adaptation are neuronal mechanisms that the retina applies for continuous adjustment to light sensitivity though a collection of cellular and synaptic mechanisms distributed across the retinal network, thus accommodating the wide input range of the visual system within the constricted output range of retinal ganglion cells. Luminance mean adaptation has been demonstrated in the output neurons of the invertebrate eye (eccentric cells), and the aim of the study was to investigate whether the homology in visual processing extends to luminance variance (contrast) adaptation as well. The spike trains of individual eccentric cells were recorded from live horseshoe …
Design, Manufacturing, And Assembly Of A Flexible Thermoelectric Device, Christopher Anthony Martinez
Design, Manufacturing, And Assembly Of A Flexible Thermoelectric Device, Christopher Anthony Martinez
USF Tampa Graduate Theses and Dissertations
This thesis documents the design, manufacturing, and assembly of a flexible thermoelectric device. Such a device has immediate use in haptics, medical, and athletic applications. The governing theory behind the device is explained and a one dimensional heat transfer model is developed to estimate performance. This model and consideration for the manufacturing and assembly possibilities are the drivers behind the decisions made in design choices. Once the design was finalized, manufacturing methods for the various components were explored. The system was created by etching copper patterns on a copper/polyimide laminate and screen printing solder paste onto the circuits. Thermoelectric elements …