AlN nanowall structures were grown on Si (111) substrate using molecular beam epitaxy at substrate temperature of 700 °C with N/Al flux ratios ranging from 50 to 660. A few types of other AlN nanostructures were also grown under the nitrogen-rich conditions. The AlN nanowalls were ranged typically 60-120 nm in width and from 190 to 470 nm in length by changing N/Al flux ratio. The AlN nanowall ...

The pinned mode in optically excited polyacetylene Is a vibrational envelope with a width of =500 cm centered at 500 cw,". The width of this mode has been attributed to single solitons interacting with a wide range of pinin par etrs. The constancy of the envelope for polyacetylene prepared by disparate methods (Shirakawa and Durham)d Cis-trans ratios, casts doubt on this concept as the underlyi...

We have calculated the width of the rare decay H → γγZ at one-loop level in the standard model for Higgs boson masses in the range 115GeV ≤ mH ≤ 160GeV . For this range of Higgs boson masses we find that Z boson is predominantly longitudinally polarized, and the photons have the same helicity. A comparison of the decay width Γ(H → γγZ) to those of H → γγ and H → γZ shows that, for the Higgs bos...

Cold drawing process is one of the most used metals forming processes in industries for forming seamless tubes. This process of plastic deformation of metals occurs below the recrystallization temperature and is generally performed at room temperature. When metal is cold worked, upon the release of forming force, the springback occurs. In this paper, the springback effect of the seamless tube t...

in the present work an attempt has been made to study the effect of the twisted tapes as bed internals, on the performance of the gas-solid fluidized beds. experimental investigation has been carried out in cylindrical column with and without twisted tapes. twelve numbers of twisted tapes of three different widths with four values of the twist ratios for each width were studied at different sta...

PURPOSE The purpose of this study was to evaluate the measured dimensions of the normal glenoid on sagittal magnetic resonance (MR) imaging to determine whether a fixed ratio of glenoid length and width can be determined. METHODS MR images of 90 glenoids in 84 patients were analyzed. The mean age was 54.8 years, with 44 male and 40 female patients. Glenoid length and width at the widest dimen...

Abstract In order to study the damage law of cuboid explosives reinforced concrete beams under contact explosion, effect action different length-to-width ratios, explosive heights and equivalents is studied by LS-DYNA numerical simulation.The results show that when amount height remain unchanged, ratio length width 1:1, volume largest. When decreases with increase in height. length-width-height...