نتایج جستجو برای: vls

تعداد نتایج: 649  

Journal: :Physical review 2021

In this work we provide theoretical background for the analysis of second-order correlation functions in experiments performed at soft x-ray free-electron lasers (XFELs). Typically, beamlines XFELs are equipped by variable line spacing (VLS) monochromators. We perform examination beam propagation through such VLS monochromator taking specially into account interplay between finite resolution an...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه قم - دانشکده علوم پایه 1388

هدف: هدف ما در این پایان نامه در مرحله اول ساخت نانوساختارهای zno و پس از آن بررسی خواص اپتوالکترونیکی این ساختارها می باشد. امروزه ساخت نانوساختارهای یک بعدی به واسطه کاربردهای فراوان صنعتی بسیار مورد توجه قرار گرفته است.در سالهای اخیر نانوساختارهای zno مانند نانو سیم ها، نانومیله ها، نانونوارهاونانوفیبرها به روش های مختلف سنتز شده اند.zno نیمه هادی با گاف انرژی عریضی در حدود ev37/3 می باشد و ...

2013
V. P. BAKSHI

This study examined the involvement of intrastriatal dopaminergic mechanisms on feeding and spontaneous locomotor activity in food-deprived (19 h) rats. In three separate experiments, amphetamine (0, 1, 10, and 20 /lg/0.5 /ll) was bilaterally infused into the nudeus accumbens (N.Acc.), the ventrolateral striatum (VLS), or the dorsolateral striatum (DLS). Administration of the higher doses of am...

2015
Dongjea Seo Jaejun Lee Sung Wook Kim Ilsoo Kim Jukwan Na Min-Ho Hong Heon-Jin Choi

UNLABELLED We grew silicon nanowires (SiNWs) by a vapor-liquid-solid (VLS) mechanism using metal catalysts of gold (Au), titanium (Ti), manganese (Mn), and iron (Fe) under a high flow rate of hydrogen (H2). This combination of catalyst types and high gas flow rate revealed the potential for growing various SiNWs, including kinked SiNWs (with Au), ultra-thin SiNWs having diameters about 5 nm (wi...

Journal: :Remote Sensing 2010
Yi Lin Anttoni Jaakkola Juha Hyyppä Harri Kaartinen

This study explores the applicability of vehicle-based laser scanning (VLS) for biomass estimation at individual tree level, since biomass serves as an essential biophysical parameter indicating tree health. Previous work suggests that terrestrial laser scanning (TLS) has been primarily validated for biomass prediction, however, in subject to laborious relocation in practice. VLS, as an advance...

2016
Chang-Yong Nam Douglas Tham John E. Fischer

Nanowires have great potential as building blocks for nanoscale electrical and optoelectronic devices. The difficulty in achieving functional and hierarchical nanowire structures poses an obstacle to realization of practical applications. While post-growth techniques such as fluidic alignment might be one solution, selfassembled structures during growth such as branches are promising for functi...

2011
Usha K. Phillips Michael G. Rosenberg Joanna Dobroszycki Mindy Katz Jorge Sansary Mindy A. Golatt Andrew A. Wiznia Jacobo Abadi

This is a retrospective comparison of pregnant women with perinatally acquired HIV-infection (PAH) with a cohort of pregnant women with behaviorally acquired HIV-infection (BAH). PAH cases (11 women) included all pregnant adolescents followed at our HIV clinic from January 2000 to January 2009. BAH cases (27 women) were randomly selected from all deliveries within the study period at the same i...

Journal: :J. Vis. Lang. Comput. 1997
J. Rekers Andy Schürr

Sentences of Visual Languages (VLs) may often be regarded as assemblies of pictorial objects with spatial relationships like “above” or “contains” between them, i.e. their representations are a kind of directed graphs. Such a spatial relationship graph is often complemented by a more abstract graph, which provides information about the syntax (and the semantics) of the visual sentence in a more...

Journal: :Nano letters 2006
Yufeng Hao Guowen Meng Zhong Lin Wang Changhui Ye Lide Zhang

There are two mass diffusion processes regarding the vapor-liquid-solid (VLS) growth of nanostructures: one is inside the catalyst droplet toward the liquid-solid interface; the other is along the side surface planes of the growing nanostructures. In this letter, microscale, modulated mass diffusion scenarios are exhibited through the synthesis of two types of ZnS nanostructures in an Au-cataly...

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