نتایج جستجو برای: propulsion
تعداد نتایج: 8858 فیلتر نتایج به سال:
ALFIA (Automated Lymphatic Function Imaging Analysis), an algorithm providing quantitative analysis of investigational near-infrared fluorescence lymphatic images, is described. Images from nine human subjects were analyzed for apparent lymphatic propagation velocities and propulsion periods using manual analysis and ALFIA. While lymphatic propulsion was more easily detected using ALFIA than wi...
Experimenting on semiconductors using ablative laser propulsion to investigate propulsion parameters
A laser can be used to propel distant objects. The ability of silicon produce thrust and its propulsive parameters are needed studied in ablative propulsion (ALP). In this work, pure doped with indium were subjected ALP achieve the momentum coupling coefficient specific impulse investigate worth as a propellant. experiment was conducted using Nd:YAG (Quantel Brilliant) operating at fundamental ...
We present an overview of the current state of detonation stability theory and discuss its implications for propulsion. The emphasis of the review is on the exact or asymptotic treatments of detonations, including various asymptotic limits that appear in the literature. The role that instability plays in practical detonation-based propulsion is of primary importance and is largely unexplored, h...
Full scale measurements of the propulsion power, ship speed, wind speed and direction, sea and air temperature from four different loading conditions, together with hind cast data of wind and sea properties; and noon report data has been used to train an Artificial Neural Network for prediction of propulsion power. The model was optimized using a double cross validation procedure. The network w...
* Presented as Paper IEPC-01-49 at the 27 International Electric Propulsion Conference, Pasadena, CA, 15-19 October, 2001. † Copyright © 2001 by the authors. Published by the Electric Rocket Propulsion Society with permission. Modeling the Hall thruster for sputter yield prediction is of considerable interest to the electric propulsion community. This paper documents the status of a finite elem...
We present a detailed analysis of the self-propulsion of a model nanometer-scale motor by reactive molecular dynamics simulations. The nanomotor is decorated with catalysts on only one side that promotes exothermic reactions of the surrounding fuel. Unidirectional drift of the nanomotor is observed that is superimposed on its Brownian motion. The motor response upon the application of external ...
Liquids in the Leidenfrost state were shown by Linke to self-propel if placed on ratchets. The vapour flow below the liquid rectified by the asymmetric teeth entrains levitating drops by viscosity. This effect is observed above the Leidenfrost temperature of the substrate, typically 200°C for water. Here we show that coating ratchets with super-hydrophobic microtextures extends quick self-propu...
Effect of Iranian Black Tea Extract and Its Isolated Thearubigins on Intestinal Transit Time in Mice
Introduction: In this study, the effects of black tea extract of Iranian tea plant (Camellia sinensis var sinensis) and its polyphenolic pigment thearubigins were investigated on mice intestinal transit time. Method: Thearubigins were isolated by liquid-liquid fraction method. The effects of black tea extract and isolated thearubigins on intestinal propulsion were measured by charcoal propulsio...
Prediction of a ship’s trajectory during a maneuvering motion is so important. In this study, the acceleration maneuver for a twin-screw vessel is directly investigated using computational fluid dynamic (CFD) environment and unsteady RANS (Reynolds Averaged Navier-Stokes) solver. For this purpose, the self-propulsion and acceleration simulations with hull and propeller interaction for the well-...
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