نتایج جستجو برای: 1367
تعداد نتایج: 2031 فیلتر نتایج به سال:
Using tight-binding as well as classical molecular dynamics we simulate the formation of single-wall carbon nanotube T-, Yand X-junctions via the fusing of two nanotubes. We propose energetically efficient pathways for this process in which all atoms maintain their sp2 arrangements throughout. Recent experimental advances have greatly increased the plausibility of synthesizing multiterminal jun...
Using soft x-ray resonant magnetic scattering with a coherent beam, we find evidence for memory effects in the magnetic configuration of a periodic array of submicron ferromagnetic lines under external magnetic field. The memory effect is explained by the dipolar coupling between the lines which is lost when the sample is saturated by the external magnetic field. 9 Author to whom any correspond...
This paper presents a novel approach for developing sustainable building materials through Sequential Learning. Data sets with total of 1367 formulations different types alkali-activated materials, including fly ash and blast furnace slag-based concrete their respective compressive strength CO2-footprint, were compiled from the literature to develop evaluate this approach. Utilizing data, compr...
The interaction between two counter-streaming laser-produced plasmas is investigated using the high-power Shenguang II laser facility. The shockwaves observed in our experiment are believed to be excited by collisionless mechanisms. The dimensionless parameters calculated with the results suggest that it is possible to scale the observation to the supernova remnants using transformation and sim...
In this work, we demonstrate that a crossed-wires superlens operated in backscattering mode can resolve targets separated by a subwavelength distance. It is theoretically shown that the effect of the backscattered field on the return loss of a probe antenna is sufficiently strong to allow us to discriminate the targets over a broad range of frequencies. These properties have been experimentally...
Coherent x-ray diffraction is used to investigate the mechanical properties of a single grain within a polycrystalline thin film in situ during a thermal cycle. Both the experimental approach and finite element simulation are described. Coherent diffraction from a single grain has been monitored in situ at different temperatures. This experiment offers unique perspectives for the study of the m...
Claudio Napoli, Filomena de Nigris, John S. Welch, Federico B. Calara, Robert O. Stuart, Receptor-Deficient Mice and Alters Aortic Gene Expression Determined by Microarray Maternal Hypercholesterolemia During Pregnancy Promotes Early Atherogenesis in LDL Print ISSN: 0009-7322. Online ISSN: 1524-4539 Copyright © 2002 American Heart Association, Inc. All rights reserved. is published by the Ameri...
The basic concepts and characteristics of Raman spectra from carbon nanotubes (both isolated and bundled) are presented. The general characteristics of the radial breathing mode, tangential mode (G band), disorder-induced mode (D-band) and other Raman features are presented, with the focus directed toward their use for carbon nanotube characterization. Polarization analysis, surface enhanced Ra...
We measured the high-resolution Cu L3 edge resonant inelastic x-ray scattering (RIXS) of undoped cuprates La2CuO4, Sr2CuO2Cl2, CaCuO2 and NdBa2Cu3O6. The dominant spectral features were assigned to dd excitations and we extensively studied their polarization and scattering geometry 8 Author to whom any correspondence should be addressed. 9 Present address: European Synchrotron Radiation Facilit...
بحران ارزی یکی از انواع بحران های مالی می باشد و اثار نامطلوبی بر بخش های مختلف اقتصاد ها برجای می گذارند.در این پایان نامه از رویکرد سیگنال دهی به منظور شناسایی عوامل موثر بر پیش بینی وقوع بحران ارزی با استفاده از داده های فصلی دوره زمانی 1367-1390 ودوره زمانی 1367-1384 در اقتصاد ایران استفاده شده است.با استفاده از این رویکرد، موثرترین شاخص های پیش بینی کننده بحران به ترتیب شامل نرخ رشد ارزش ا...
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