background: in helical tomotherapy (ht), the scaling factor (sf) is the time in seconds that each leaf viewing a target would need to be open to deliver the prescribed dose. the sf is patient-specific and is used to calculate the rotational period of the gantry, and the total treatment time (ttt) of the ht. the sf is generally difficult to estimate. currently, it takes about one hour to fully o...

study of the spatial variability of infiltration characteristics is essential to estimating infiltration parameters on a local scale. the objectives of the present study were to scale the parameters of a philip two-term model for infiltration and survey the variability of infiltration characteristics geostatistically using wastewater in the bajgah catchment. infiltration was measured at 30 poin...

Significant power-law long-range correlated structures have been identified in the Italian seismicity from 1983 to 2003. We performed the Allan Factor Analysis and the Detrended Fluctuation Analysis on both the full and the aftershock-depleted seismic data, extracted by the INGV (National Institute of Geophysics and Volcanology) instrumental catalog. Our findings suggest that (i) the time-scali...

We perform inversions of gravity data (geopotential model EGM96) and seismic tomography model (S16RLBM) for the scaling factor (ζ ), which relates relative density anomalies to relative S-wave velocity anomalies. The gravity data and tomographic model are anti-correlated below continents down to a depth of z = 200 km. This anti-correlation is not present below oceans. Except for smoothness, whi...

Synaptic scaling is a key homeostatic plasticity mechanism and is thought to be involved in the regulation of cortical activity levels. Here we investigated the spatial scale of homeostatic changes in spine size following sensory deprivation in a subset of inhibitory (layer 2/3 GAD65-positive) and excitatory (layer 5 Thy1-positive) neurons in mouse visual cortex. Using repeated in vivo two-phot...

speciated samples of pm2.5 were collected at the hamshire and orange sites in golden triangle of texas by us epa (environmental protection agency) from july of 2003 to august of 2005. a total of 269 samples for the hamshire site and 293 samples for the orange site with 52 species were measured; however, 22 species were excluded because of too many below-detectionlimit data. among the 22 species...