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Showing 1 to 14 of 14 for “"Rate calculations"”.
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Microwave data reduction technique for calculation of solid propellant burning rates
… system for obtaining continuous burning-rate information from a solid propellant slab-burning rocket motor is described. A previous derivative-based method for reducing the microwave data is reviewed and an improved data reduction technique is introduced. The improved microwave modeling …
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Indoor Concentration Simulation of Radon Isotopes and Their Decay Products
… a function of their outdoor concentration, the rate of emanation from inside, ventilation, deposition, and resuspension. Steady-state and time-dependent equations, derived by Thompson, were used to evaluate the relative effects of these variables on the potential alpha energy concentraiton …
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Imaging the ionization track of alpha recoils for the directional detection of weapons grade plutonium
… neutron source, compared with probability-based rate calculations and Geant4 simulation rates. The detector, in its current configuration agrees well with the expected rates, showing a 95% track reconstruction efficiency, computed from both the probability-based rate calculation and the Geant4 …
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Controls on Dissolution Rate Variation at a Pair of Underflow-Overflow Springs at The Savoy Experimental Watershed
… used in the past to study limestone dissolution rates. Numerical models have typically used constant dissolution rates, whereas rates in nature vary in time. Limestone tablets allow natural estimation of rates over month time scales, but these rates cannot necessarily be extrapolated to geologic …
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Design And Implementation Of An Emission Spectroscopy Diagnostic In A High-pressure Strand Burner For The Study Of Solid Propell
… cable to investigate the visible emission generated from three variations of solid propellants. The grating was blazed for a wavelength range from 200 to 800 nm, and the spectrometer system provides time resolutions on the order of 1 millisecond. One propellant formula contained a fine aluminum …
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Dynamic subdivided relative humidity model of a polymer electrolyte membrane fuel cell
… fuel cell stack is presented. This model is integrated with a first law based thermal model, which tracks energy flow within four defined control volumes in the fuel cell; the cathode channel, anode channel, coolant channel, and fuel cell stack body. Energy and mass conservation equations are …
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General method for the synthesis of pseudodisaccharides. Diels-Alder approach to the synthesis of pseudodisaccharides
… of the synthesised chemical compounds. Rate calculations are reported in Appendix I and the X-ray crystallographic data are presented in the Appendix II.
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An experimental study of the aft guide vanes of an engine bypass nacelle for low-boom supersonic flight
… cross-section, and to choke and then accelerate the flow to supersonic freestream conditions upon exit. A supersonic wind tunnel facility at the University of Illinois was modified and used to simulate the flow through the aft bypass at approximately 6% scale. In order to aid in …
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Simulations of subsurface multiphase flow including polymer flooding in oil reservoirs and infiltration in vadose zone
… polymer model within the Implicit Parallel Accurate Reservoir Simulator (IPARS), which enables parallel simulation of non-Newtonian fluid flow through porous media. The following properties of polymer solution are modeled in this work: 1) polymer adsorption; 2) polymer viscosity as a function of …
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Design and Demonstration of a DAB Based RadCom System
… the motivation to merge the traditionally separate communication and radar systems into a single radar first radar-communications or ‘RadCom' system. The goal of this system is to use a single hardware platform to transmit a standards based waveform, that can be used for both radar and …
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Nanostructures and alloys : multiple scattering and nonlinearities in phonon transport
… applications. Ab initio methods have demonstrated accurate calculations of the lattice contribution to thermal conductivity in semiconductors and dielectrics. Effective field theories and scattering theory have been combined to model alloys and systems with embedded nanostructures. The …
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An information theoretic study of modeling and control of dynamical systems
… the fundamental limitation to certain entropy rates of the input/output signals. We propose a hidden Markov model(HMM) framework for the closed-loop system, under which the entropy rate calculations become straight forward. Explicit entropy bounds are thus obtained for both the classical Bode …
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Theoretical and computational investigations into structure-function relationships of biomolecular machines at atomic resolution
… bioinformatics approaches and free energy calculations, we characterize how the UvrD helicase changes its conformation at the fork junction to switch its function from unwinding to rezipping DNA. The obtained transition pathway shows that UvrD opens the interface between the 2B/1B domains, …
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The Mid-Latitude Ionosphere: Modeling and Analysis of Plasma Wave Irregularities and the Potential Impact on GPS Signals
… near the plasmapause, the drift mode growth rate at short wavelengths may explain the mid-latitude decameter-scale ionospheric irregularities observed by the Super Dual Auroral Radar Network (SuperDARN). In the context of this dissertation, we focus on investigating the plasma waves …