منابع مشابه
Traveling backward
class of neurons known as starburst amacrine cells compute the direction of a visual stimulus, according to new results from Thomas Euler, Peter Detwiler (University of Washington, Seattle, WA), and Winfried Denk (Max Planck Institute for Medical Research, Heidelberg, Germany). The experiments show that starburst dendrites signal independently of the electrical activity of the soma, an ability ...
متن کاملBackward-Wave Cancellation in Distributed Traveling-Wave Photodetectors
This paper describes the design, fabrication, and measurement of backward-wave-cancelled distributed traveling-wave photodetectors. One of the fundamental issues in traveling-wave photodetectors is the generation of backward-waves, which reduces bandwidth or, in the case of matched input termination, reduces their radio-frequency (RF) efficiencies by up to 6 dB. We report a traveling-wave photo...
متن کاملBreakdown of the Slowly Varying Amplitude Approximation: Generation of Backward Traveling Second Harmonic Light
By numerically solving the nonlinear field equations, we simulate second-harmonic generation by laser pulses within a nonlinear medium without making the usual slowly-varying-amplitude approximation, an approximation which may fail when laser pulses of moderate intensity or ultrashort duration are used to drive a nonlinear process. Under these conditions we show that a backward-traveling, secon...
متن کاملBackward Children
Dr. Holmes' contribution to the series edited by Professor O'Shea is "an inductive study of backward children. It presents in a series of concrete illustrations," says Dr. Holmes, "studies of cases to exemplify the principles and methods underlying the diagnosis, treatment and training of backward children." His aim has been to describe the cases "simply, non-technically, and humanly." His succ...
متن کاملBackward Control
Control refers to an obligatory referential dependency between an argument of a verb and the subject of the verb’s clausal complement. In many languages, the direction of the control relation can only be forward, as it is the matrix argument that provides the referential identity of the silent embedded subject. A priori, however, there is no reason to rule out a backward control relation, where...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2002
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb1585rr4