This study performed a salt water spray test using zinc-coated steel sheet specimens, which are coated with S-700 solution and LR-0317. Test specimens were treated in the drying oven at 170∼210 °C for 5 minutes ...
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Due to the coupling between the plasma membrane and the actin cytoskeleton, membrane molecules such as receptor proteins can become immobilized by binding to cytoskeletal structures. We investigate the effect of immob...
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Due to the coupling between the plasma membrane and the actin cytoskeleton, membrane molecules such as receptor proteins can become immobilized by binding to cytoskeletal structures. We investigate the effect of immobile membrane molecules on the diffusion of mobile ones by modeling the membrane as a two-dimensional (2D) fluid composed of hard particles and performing event-driven molecular dynamics simulations at a particle density where the system is in an isotropic liquid state. We show that the diffusion coefficient sharply decreases with increasing immobile fraction, dropping by a factor of ∼3 as the fraction of immobile particles increases from 0 to 0.1, in a system-size dependent manner. By combining our results with earlier calculations, we estimate that a factor-of-∼20 reduction in diffusion coefficients in live cell membranes, a puzzling finding in cell biology, can be accounted for when less than ∼22% of the particles in our model system is immobilized. Furthermore, we investigate the effects of confinement induced by a correlated distribution of immobile particles by calculating the distribution of the time it takes for particles to escape from a corral. In the regime where the particles can always escape from the corral, it is found that the escape times follow an exponential distribution, and the mean escape time grows exponentially with the density of obstacles at the corral boundary, increasing by a factor of 3–5 when immobile particles cover 50% of the boundary, and is approximately proportional to the area of the corral. We believe that our findings will be useful in interpreting (1) single molecule observations of membrane molecules and (2) results of particle based simulations that explore the effect of fluid dynamics on molecular transport in a 2D fluid.
Effect of slope inclination on step friction coefficient of human being was studied by gait friction tester developed by Henan University of science and *** is beneficial to improving the safety of human beings while ...
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Effect of slope inclination on step friction coefficient of human being was studied by gait friction tester developed by Henan University of science and *** is beneficial to improving the safety of human beings while walking on a *** on the trajectory of mass center of body(MCOB)and the mechanical analysis of human body while walking,conclusion could be drawn that the required step frictional coefficient(RSFC)exhibited an"M"shaped curve during the foot contacting with the ground and got its maximum and minimum values when MCOB of the subject was at the highest and lowest position ***,the first peak of RSFC decreases firstly and then increases,while the second peak of RSFC increases with the increase of slope inclination at the experimental *** position of pivotal point is decided by the relative size of slope inclination and the angle between the plumb line through MCOB and the line from foot to MCOB.
We measure the adsorption height of hydrogen-intercalated quasifreestanding monolayer graphene on the (0001) face of 6H silicon carbide by the normal incidence x-ray standing wave technique. A density functional calcu...
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We measure the adsorption height of hydrogen-intercalated quasifreestanding monolayer graphene on the (0001) face of 6H silicon carbide by the normal incidence x-ray standing wave technique. A density functional calculation for the full (63×63)−R30° unit cell, based on a van der Waals corrected exchange correlation functional, finds a purely physisorptive adsorption height in excellent agreement with experiments, a very low buckling of the graphene layer, a very homogeneous electron density at the interface, and the lowest known adsorption energy per atom for graphene on any substrate. A structural comparison to other graphenes suggests that hydrogen-intercalated graphene on 6H−SiC(0001) approaches ideal graphene.
We demonstrate real time terahertz detection based on its absorption by carbon nanotubes composite and detection of the generated photoacoustic signal. This method has advantages of real time response, compact size an...
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We report in situ atomic-resolution transmission electron microscopy observations of the oxidation of stepped Cu surfaces. We find that the presence of surface steps both inhibits oxide film growth and leads to the ox...
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We report in situ atomic-resolution transmission electron microscopy observations of the oxidation of stepped Cu surfaces. We find that the presence of surface steps both inhibits oxide film growth and leads to the oxide decomposition, thereby resulting in oscillatory oxide film growth. Using atomistic simulations, we show that the oscillatory oxide film growth is induced by oxygen adsorption on the lower terrace along the step edge, which destabilizes the oxide film formed on the upper terrace.
This paper proposes a framework for decentralised task allocation in which agents find a global solution sharing local performance metrics. Leveraging the PAUSE procedure for Combinatorial Auctions we outline a decent...
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ISBN:
(纸本)9781479974719
This paper proposes a framework for decentralised task allocation in which agents find a global solution sharing local performance metrics. Leveraging the PAUSE procedure for Combinatorial Auctions we outline a decentralised version of in order to solve a task allocation problem. The algorithm has polynomial communications overheads and it can also accommodate a variety of objective functions and task dependencies. To investigate its performance, some numerical experiments were carried out and their results were compared to those of an optimal solver and a representative alternative algorithm, namely CBBA, solving the problem with three representative objective functions: MinSum, MinMax and MinAve. The results show that, overall, the proposed algorithm outperforms the current state of the art alternative, moreover the results for MinSum show that it always finds optimal solutions while it remains close to the optimal for MinMax and MinAve.
In this paper, we present a new method to determine the relative permittivity of periodic stratified media using the iterative time-reversal method. Based on transmission line theory, the focal peak value of iterative...
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Confocal photoluminescence scans of monocrystalline CdTe/MgCdTe double heterostructures epitaxially grown on lattice-matched InSb substrates reveal very low twin defect density, below 1 × 10 5 cm -2 . Room-tempe...
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Confocal photoluminescence scans of monocrystalline CdTe/MgCdTe double heterostructures epitaxially grown on lattice-matched InSb substrates reveal very low twin defect density, below 1 × 10 5 cm -2 . Room-temperature Shockley-Read-Hall (SRH) lifetimes of these samples are determined in the range of 35 ns to 86 ns using time-resolved photoluminescence (TRPL) measurements. Temperature-dependent TRPL measurements show that the carrier lifetime reaches a peak of 910 ns at 200 K. Excitation-dependent PL measurements reveal the radiative recombination coefficient of CdTe to be 4.3 × 10 -9 cm 3 ·s -1 .
In this paper, we demonstrate the stable operation of integrated 4H-silicon carbide (SiC) diode bridge rectifier circuits at high temperature up to 773 K for the first time. The turn-on voltages of the fabricated 4H-S...
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In this paper, we demonstrate the stable operation of integrated 4H-silicon carbide (SiC) diode bridge rectifier circuits at high temperature up to 773 K for the first time. The turn-on voltages of the fabricated 4H-SiC pn diode are 2.6 V and 1.4 V at room temperature and 773 K, respectively, with a low shifting rate of 2.2 mV/K. The integration of the 4H-SiC diode bridge rectifier circuit was achieved with contact and interconnect metallization technique for high temperature. The demonstration of the extremely high temperature operation of the integrated 4H-SiC diode bridge rectifier circuits brings promising applications in harsh environment electronics and sensing.
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