abstract bottom rack intake is one of the most popular structures used for diverting water in mountain region. corrosion and rotten problems of bottom racks inspire the introduction of a new system of bottom intake in which a porous media is replaced by the bottom rack. obviously, clogging and reduction of diverted discharge are the most important problems in this new system, too. in this paper...

Field emitters can be used as a cathode electrode in a cathodoluminescence device, and single-walled carbon nanotubes (SWCNTs) that are synthesized by arc discharge are expected to exhibit good field emission (FE) properties. However, a cathodoluminescence device that uses field emitters radiates rays whose intensity considerably fluctuates at a low frequency, and the radiant fluctuation is cau...

The degree of polarization (DOP) of luminescence of III-V materials is a sensitive function of the strain in the material. The DOP can be measured with a spatial resolution of roughly 1 μm and an rms noise equivalent to a strain difference of 2H10. The DOP can be measured on cleaved facets, surfaces free of metals, or luminescent layers buried by transparent materials or thin films. Thus maps o...

Vacuum preloading combined with prefabricated vertical drains (PVDs) system has been widely used to improve the soft clay high water content. Clogging is usually formed around PVDs during vacuum preloading, impeding propagation of pressure and slowing down consolidation process. To understand forming mechanism clogging, particle image velocimetry (PIV) technique tracking (PTV) were adopted in m...

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We are very pleased with the interest shown in our paper and the recognition of this common clinical problem [1]. The authors provided an in-depth validation and analyses of some of the existing makeshift methods and related suction pressures; however, we did not aim to collect this sort of data in our clinical study. The purpose of our study was to determine the incidence of chest tube cloggin...

We investigate the effect of peculiar velocities on the redshift space distribution of z >∼ 2 galaxies, and we focus in particular on Lyα emitters. We generate catalogues of dark matter (DM) halos and identify emitters with halos of the same comoving space density (M(Lyα emitters) ≈ 3× 1011M⊙). We decompose the peculiar velocity field of halos into streaming, gradient and random components, and...

Recently developed all-organic emitters used in display applications achieve high brightness by harvesting triplet populations via thermally activated delayed fluorescence. The photophysical properties of these emitters therefore involve new inherent complexities and are strongly affected by interactions with their host material in the solid state. Ensemble measurements occlude the molecular de...

Carbon nanotube (CNT) field emitters that exhibit extremely high stability against high-voltage arcing have been demonstrated. The CNT emitters were fabricated on a sharp copper tip substrate that produces a high electric field. A metal mixture composed of silver, copper, and indium micro- and nanoparticles was used as a binder to attach CNTs to the substrate. Due to the strong adhesion of the ...

We report a single molecule detection scheme to investigate excitation spectra of single emitters at room temperature. We demonstrate the potential of single emitter photoluminescence excitation spectroscopy by recording excitation spectra of single CdSe nanocrystals over a wide spectral range of 100 nm. The spectra exhibit emission intermittency, characteristic of single emitters. We observe l...