| jianvzqn | Date: Thursday, 14.11.2013, 23:48 | Message # 1 |
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Sergeant
Group: User
Messages: 24
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| I am investigating how the visual system switches from a state of rivalry to a state supporting conventional stereopsis, and how the visual system switches from a state of rivalry to state supporting occlusion based stereopsis. One study by Harrad et al. (1994) found that a fusible binocular stimulus terminates rivalry but requires approximately 150ms for fusion to fully recover for conventional stereopsis. No study has been performed on the effects of suppression on depth recovery in occlusion based stereopsis. This project intends to fill this void in the literature.
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I recall the terrible floods that afflicted Central Pennsylvania in 1972. After my first Navy tour of duty I attended a summer semester at Penn State University at the main campus in State College, PA. I remember being diverted all over the area by the Pennsylvania National Guard, as many roads and highways were washed out. We made it to Penn State, but it took some time, and we passed many damaged homes, cars, and businesses.
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This study utilizes a novel technique to map the Defense Meteorological Satellite Program (DMSP) data across the two hemispheres to learn about the morphology and plasma composition of the topside ionosphere, and the underlying ionospheric dynamics. In the southern winter hemisphere, the regional maps tracked a heavy ion (Ni O+) trough,aurora zone, polar hole, and large plasma density depletion. The latter appeared in the region of the South Atlantic Magnetic Anomaly (SAMA). The electron temperature (Te) map detected the thermal characteristics of these features, while the plasma drifts and flux maps tracked their dynamics. Results show that there were special electrodynamic effects in the SAMA region due to the low magnetic field and high conductivity. These increased the vertical downward (VZ) and the westward (VY) drifts. Independently, the VZ and VY maps registered the affected area that was depleted in heavy ions and rich in light ions. Some field aligned profiles tracked the impact of these SAMA effects on the heavy ion trough, which was a stagnation trough and appeared markedly differently at different longitudes. At trough latitudes ((56 4)S (geomagnetic) when Dstav = 0 nT), the elevated electron temperatures forming a Te peak indicated subauroral heating effects. A statistical study modeled the magnetic activity dependence of the Te peak's magnitude and location and revealed their linear correlation with the activity level. Statistically, the Te peak increased <>0.226 1.355]K and moved equatorward <>.051 0.009] (geomagnetic) per 1 nT decrease in the averaged Dst index. Per 1 nT increase in the averaged AE index, its magnitude increased <>.315 0.444]K and the equatorward movement was <>.014 0.003].
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