To establish the presence and orientation of the proposed striped phase in ultra-high-mobility 2D electron systems at nu = 9/2, current path transport properties are determined by varying the separation and alignment of current and voltage contacts. Contacts aligned orthogonal to the proposed intrinsic striped phase produce voltages consistent with current spreading along the stripes; current d...

The efficiency of positron production by a 1.2-GeV electron beam incident on a tungsten single crystal oriented in an axially channeling condition has been experimentally studied. Positron yields from a 1.2-mm-thick crystal have been measured to be ,2.5 3.0 times larger than those from amorphous targets with the same thickness. A simple model simulation of the positron production process shows ...

Oneand two-dimensional concentration profiles of high-dose boron implants have been computed using our Monte Carlo simulator IMSIL. In the I-D case they have been compared with experiments obtaining very good agreement. The lattice damage formation is taken into account according to the modified Kinchin-Pease model. A factor of 118 was found to properly describe the self-annealing process reduc...

Odorant detection in insects involves heterodimers between an odorant receptor (OR) and a conserved seven-transmembrane protein called Or83b, but the exact mechanism of OR signal transduction is unclear. Two recent studies in Nature (Sato et al., 2008; Wicher et al., 2008) now reveal that these OR-Or83b heterodimers form odorant-gated ion channels, revealing a surprising new mode of olfactory t...

Channeling is a form of allocation bias, where drugs with similar therapeutic indications are prescribed to groups of patients with prognostic differences. Claimed advantages of a new drug may channel it to patients with special pre-existing morbidity, with the consequence that disease states can be incorrectly attributed to use of the drug. For the study of adverse drug reactions, large databa...

Experimental work in electron channeling in silicon crystals has yielded a resonance suggestive of de Broglie’s internal clock for the electron, but with a Monte Carlo simulated frequency twice that of de Broglie’s. An explanation is provided based on a previously developed four-dimensional model of the electron. The additional spatial degree of freedom resolves a large number of physical and m...

Micromachined, micron-thick porous alumina membranes with closed pore endings show high electron transparency above an energy of 5 keV. This is due to the channeling of electrons along the negatively charged insulating pores after surmounting the thin entrance layer. We also find a sharp hightransparency energy window at energies as low as 2 keV which may be the result of a local maximum of cha...

Increase in the area and neuron number of the cerebral cortex over evolutionary time systematically changes its computational properties. One of the fundamental developmental mechanisms generating the cortex is a conserved rostrocaudal gradient in duration of neuron production, coupled with distinct asymmetries in the patterns of axon extension and synaptogenesis on the same axis. A small set o...