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Full-Text Articles in Physics
Study Of Edgeless Timepix Pixel Devices, Dylan G. Hsu
Study Of Edgeless Timepix Pixel Devices, Dylan G. Hsu
Honors Capstone Projects - All
Silicon micropattern devices are crucial components of detector systems designed to study decays of exotic subatomic particles containing beauty and charm quarks. Among the technologies under consideration for use in future particle physics experiments are edgeless silicon pixel detectors. In these devices a state-of-the-art fabrication process is used to create sensors with a nearly full active area, as compared to conventional sensors which have a “guard ring” which is a dead region at the sensor periphery. Prototypes used for the study described in this paper were designed and fabricated by VTT Technical Research Centre of Finland. In a test beam …
Intracellular Signaling: How Do Cells Respond To Single And Multiple Inputs, Latoya Crayton
Intracellular Signaling: How Do Cells Respond To Single And Multiple Inputs, Latoya Crayton
Honors Capstone Projects - All
One important biological question is how the cell processes input information and decides what to respond. The cell can integrate the multiple inputs using linear and nonlinear dynamics to generate an appropriate output. This study focuses on the computerized recording of phototaxis (movement in relation to light direction) of Chlamydomonas cell populations response to green light, which activates the rhodopsin photoreceptor at their eyespots. The inputs are light stimulation of various wavelengths and intensities; and chemicals (IBMX, a PDE inhibitor; 2'5'-dideoxyadenosine, an adenylate cyclase inhibitor, 8-Br-cAMP-Na and Dibutyryl cAMP, cAMP analogs) affecting an important intracellular messenger, cAMP. The quantified output …