Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Direct Radiation"”.
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Two dimensional control of metamaterial parameters for radiation directivity
… the feasibility of using metamaterials to direct radiation. The limits of required index of refraction and the required material depth are explored using MATLAB simulations. A wedge of connected S-shape metamaterial is chosen and simulated in CST Microwave Studio. The incident radiation is …
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Application of the kinetic theory of partly ionized gases to radiation transfer and ionization in hydrogen nebulae
… separated into a singular part corresponding to “direct” radiation from the star, and a non-singular part corresponding to “diffuse” radiation. The concept of statistical equilibrium is applied to the electron population to provide an auxiliary equation, and the Stromgren equation derived as an …
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Comparing water to DNA for simulation of Auger electron direct damage to DNA using Geant4
… (DNA) in Monte Carlo simulations of biological radiation interactions. Prior to this work, it was unclear whether water is an appropriate stand-in for DNA when simulating direct radiation damage on the nano scale. The increased interest in targeted tumor therapy using Auger electrons has …
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Controlling coupling in an electrically steerable parasitic array
ESPAR antennas can direct radiation and steer nulls by using variable passive elements like varactors, avoiding the cost and complexity of devices like phase shifters. Past attempts to design multi-band ESPARs have often superimposed multiple antenna arrays, each scaled for a different frequency …
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A methodology for integrated thermofluid modelling of radiant superheaters in steady state and transient operations
… convective and radiative thermal resistances and direct radiation on the flue gas side. The model captures the physical layout of the tube passes in a tubesheet via the arrangement of the network building blocks. It is also possible to connect tubesheets together across the width of the boiler as …
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Evaluation of zero-dimensional furnace models for biomass-fired boilers with the aid of CFD and plant measurements
… uptake, furnace exit gas temperature (FEGT), and direct radiation impinging on downstream heat exchangers under varying operational conditions. Although radiation heat transfer is highly dependent on three-dimensional geometry, one-dimensional process models that integrate zero-dimensional (0-D) …
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1D and 3D simulation of a water cooled reactor cavity cooling system experimental facility
… study mean that the results can't be used as a direct comparison with the experiments but can nonetheless be used to philosophically understand the phenomena that occur within the facility. The finned configurations shielded the back wall from direct radiation heat transfer from the heater wall, …
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The role of lysosomes in radiation induced genomic instability
Our understanding of ionizing radiation and its associated biological effects has recently under- gone a paradigm shift from a DNA-centric model to one inclusive of non-targeted effects (NTE), so called for the lack of direct radiation interaction with DNA. Two effects encompassed within the NTE …