نتایج جستجو برای: hole
تعداد نتایج: 61335 فیلتر نتایج به سال:
School of Marine Sciences, Sun Yat-Sen University, Guangzhou, China School for Marine Science and Technology, University of Massachusetts-Dartmouth, New Bedford, MA 02744, USA Department of Physical Oceanogra hy, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA Department of Civil Engineering, Ins...
We consider the spin interaction in the Hamiltonian for the positively charged exciton X, determining the spin states and Zeeman-level diagrams for X in which the heavyand light-hole bands are degenerate and nondegenerate. The former case results in an X with quintuplet and septet states in addition to the singlet and triplet states that are also observed for the negatively charged exciton X. W...
A natural explanation for the carrier concentration-dependent electronic behavior in the layered cobaltates emerges within correlated-electron Hamiltonians with finite on-site and significant nearest neighbor hole-hole Coulomb repulsions. The nearest neighbor repulsion decreases hole double occupancy below hole density 1/3, but increases the same at higher hole densities. Our conclusion is vali...
We derive a universal upper bound to the entropy of a charged system. The entropy bound follows from application of the generalized second law of thermodynamics to a gedanken experiment in which an entropy-bearing charged system falls into a charged black hole. This bound is stronger than the Bekenstein entropy bound for neutral systems. Black-hole physics mirrors thermodynamics in many respect...
all the producing and assembling processes exert residual stress on the pieces that may lead to structural failure. therefore, calculating the residual stress in such structures has been common in recent years. in this article, distribution of temperature and residual stress resulting from arc welding in three-pass butt joint in p91 austenitic stainless steel pipes is calculated and estimated u...
rectangular waveguide (wr) is one of the earliest types of transmission lines. rectangular waveguide can be produced by hot extrusion process. in this paper, the hot extrusion process of cuzn5 rectangular waveguide was investigated by finite element method (fem). in addition, genetic algorithm method (ga) was used to optimize the die geometry and process conditions to achieve the lowest magnitu...
a linear superposition method was used for modeling the time history of the production blast vibrations and optimizing the blast sequence to reduce vibration levels in sar-cheshmeh copper mine, kerman, iran. a single-hole blast for modeling and two double-hole blasts with time delays of 25 and 65 ms between two holes for modeling validation were carried out. the generated vibrations were measur...
The transmission of light through a subwavelength hole drilled in a metallic thin .lm is calculated by numerically solving Maxwell's equations both for a simple hole and for a hole with additional structure. A maximum in the transmission cross section is observed for hole diameters of the order of but smaller than the wavelength. Transmission cross sections well above the hole area are shown to...
purpose: the first step to manage motor impairment of upper limb in patients with subacute stroke is having an accurate assessment tool. the fugl-meyer assessment of upper extremity and 9-hole pegboard test are used to evaluate motor function and hand dexterity in stroke survivals. the present study aimed to investigate the test-retest reliability and minimal detectable change (mdc) in these tw...
pharmacological evaluation of sedative activity of methanolic extract of thuja occidentalis in mice.
the methanolic leaf extract of thuja occidentalis was evaluated for possible sedative activities in mice. sedative activity was evaluated by using hole cross, open field, thiopental sodium-induced sleeping time and elevated-plus maze (epm) tests at 200mg/kg and 400 mg/kg. the extract decreased the locomotor activity of mice in hole cross, open field and epm test and showed the remarkable resul...
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