نتایج جستجو برای: width of urbach tail
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detail_view&confID=40&abstractID=34492; cited May 8, 2008] 25. Hodgson D, Urbach D, Przybysz R, Gong Y, Sullivan T, Rabeneck L. Cancer surgery. Chapter 2. In: Tu JV, Pinfold SP, McColgan P, Laupacis A, eds. Access to Health Services in Ontario. Toronto: Institute for Clinical Evaluative Sciences; April 2005: 10. [Available online at: www.ices.on.ca/WebBuild/ site/ices-internet-upload/file_colle...
Surface-modification of TiO(2) is found to be a powerful tool for manipulating the fundamental optical and photoelectrochemical properties of TiO(2). High surface area nanocrystalline TiO(2) was modified by urea pyrolysis products at different temperatures between 300 degrees C and 500 degrees C. Modification occurs through incorporation of nitrogen species containing carbon into the surface st...
Working memory is a vital cognitive capacity without which meaningful thinking and logical reasoning would be impossible. Working memory is integrally dependent upon prefrontal cortex and it has been suggested that voluntary control of working memory, enabling sustained emotion inhibition, was the crucial step in the evolution of modern humans. Consistent with this, recent fMRI studies suggest ...
A comparison of HF radar backscatter observed by the CUTLASS Finland radar, meridian scanning photometer data from Longyearbyen, magnetic field variations from IMAGE stations, and particle precipitation measured by the DMSP F12 spacecraft is presented. The interval under discussion occurred in the pre-midnight local time sector, during a period of weakly northward interplanetary magnetic field....
Borosilicate BK7 glasses doped with different amounts of CeO2 (0.5,1,1.5%) were prepared by the convenient melting process in this work. DTA analysis proved that 0.5-1% CeO2 has a network modifier role and then up to 1.5% it shows network former role.For structural studies, FT-IR and Raman spectroscopy were carried out. Fermi energy level, direct/ indirect optical band gap and Urbach energy wer...
Differential energy spectra of electrons observed in an auroral breakup show evidence that an incident electron beam of energy E = 6-13 keV, width of 2-5 keV, and variable intensity was stabilized over a period of at least several minutes by the oscillating two-stream instability in the manner previously described by Papadopoulos and Coffey. The critical observed feature predicted by these auth...
A new design for an all optical flip flop is introduced. It is based on a nonlinear Distributed Bragg Reflector (DBR) semiconductor laser structure. The device does not require a holding beam. An optical gain medium confined between 2 Bragg reflectors forms the device. One of the Bragg reflectors is detuned from the other by making its average refractive index slightly higher, and it has a nega...
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