نتایج جستجو برای: deep beams

تعداد نتایج: 242332  

Journal: :Nanotechnology 2009
Jennifer Y Lee Mark J Noordhoek Peter Smereka Hugh McKay Joanna M Millunchick

Focused ion beams are used to pattern GaAs(001) surfaces with an array of nanometer-deep holes upon which deposition of InAs results in quantum dot formation at the hole location. Experiments show that the size and quantity of quantum dots formed depend on growth parameters, and ion dose, which affects the size and shape of the resulting holes. Quantum dots fabricated in this fashion have a pho...

2017
Keiichi Nakagawa Kanabu Nawa Masatoshi Hashimoto Shuri Aoki Yoshihiro Kaneko Hideomi Yamashita Akihiro Haga

A technique for multiple deep-inspiration breath-hold (DIBH) volumetric modulated arc therapy (VMAT) for a lung tumor has been proposed with 10 MV flattening-filter-free beams and an image sensor measuring a distance map to thorax surface. Planning CT images were acquired under a DIBH condition and a clinical target volume (CTV) was contoured. This procedure was repeated five times and an inter...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1393

حلالهای deep eutectic اخیرا بعنوان حلالهای سبز شناخته شده اند.ای حلالها می تواند محیط مناسبی برای واکنشهای آنزیمی باشد بنابراین در این مطالعه اثر این مایعات بر فعالیت، پایداری و ساختار آنزیم لاکاز بررسی شد.

2004
W. K. Vos D. G. Buma P. H. Veltink

A spatial electrocutaneous display for sensory substitution is being designed. The display will be used to feed back sensory signals from transfemoral prostheses to amputees. The aim is to improve their walking performance. Two experiments have been performed to optimise the display parameters for dynamic, cyclic signals, which are common during walking. From these experiments it became clear t...

Journal: :Biomedical optics express 2016
Wei Zhang Dianwen Zhu Michael Lun Changqing Li

X-ray luminescence computed tomography (XLCT) is an emerging hybrid imaging modality, which is able to improve the spatial resolution of optical imaging to hundreds of micrometers for deep targets by using superfine X-ray pencil beams. However, due to the low X-ray photon utilization efficiency in a single pinhole collimator based XLCT, it takes a long time to acquire measurement data. Herein, ...

2002
Stefano Forte

We review the way intense neutrino beams at the front–end of a muon storage ring can be used to probe the structure of hadrons. Specifically, we discuss how the polarized and unpolarized flavor structure of the nucleon can be disentangled in inclusive deep-inelastic scattering, and how less inclusive measurements can shed light on various aspects of hadron structure such as fragmentation functi...

Journal: :The Journal of the Acoustical Society of America 2012
H C Song

A recent experiment showed that coherent long-range acoustic communication (200-300 Hz) is feasible in deep water over a ∼550-km range between a source and a horizontal towed array (∼100 m aperture). The low input signal-to-noise ratio (SNR) (e.g., -10 dB) at an element level required conventional beamforming to enhance the SNR of the communication signals for subsequent channel equalization an...

Journal: :Fibers 2021

This study investigates the possibility of replacing minimum web reinforcement in deep beams with discrete fibers. Additionally, equivalent dosage fibers required to obtain similar performance beam is investigated. Deep made plain concrete no fibers, as per AASHTO LFRD recommendations (0.3% both horizontal and vertical), a 0.5% volume fraction steel, macro-synthetic hybrid are tested at shear s...

Journal: :Welding in The World 2022

Abstract Deep-penetration laser beam welding is highly dynamic and affected by many parameters. Several investigations using differently sized spots, spot-in-spot systems, multi-focus optics show that the intensity distribution one of most influential parameters; however, targeted lateral axial design remains a major challenge. Therefore, processing optic has been developed coaxially combines t...

Journal: :international journal of civil engineering 0
d. f. cao huayang xilu 198,yangzhou,jiangsu,china 225127 w. j. ge huayang xilu 198,yangzhou,jiangsu,china 225127 b. y. wang college of civil science and engineering, yangzhou university, yangzhou 225127, china y. m. tu key laboratory of concrete and prestressed concrete structure of ministry of education, southeast university, nanjing 210096, china

in order to investigate the flexural behaviors of rc beams after freeze-thaw cycles, compressive strength test of concrete cubes after 0, 50, 100, 125 freeze-thaw cycles were made, and static flexural experiment of 48 rc beams after 0, 50, 100, 125 freeze-thaw cycles were made. the relationships of relative compressive strength, mass loss rate, relative dynamic elastic modulus and numbers of fr...

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