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 20 of 48 for “"Effective Temperature"”.
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Atomistic simulations of driven alloys: a study of effective temperature models for low and high temperature applications
… that evolves in driven alloys has been the effective temperature model (ETM) which posits that the non-equilibrium phases formed during processing will correspond to the equilibrium phase at a different, typically higher, effective temperature different from the ambient one. The underlying …
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Quantification Of Auto-Ignition In Diesel Engines
… to the differences in ignition delay (ID) and effective temperature definitions used. Most researchers agree upon the start of ID time as the start of injection (SOI). The main point of disagreement has been in defining the end of ID period which is considered to be the start of combustion …
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The Formation Of Massive Stars: A 30 Mo Case Study
… Mo the internal structure, luminosity and effective temperature of the accretion and canonical ZAMS models were essentially the same. Beyond {dollar}sim{dollar}17 Mo, the accretion models become increasingly more luminous and cooler. For masses greater than {dollar}sim{dollar}15 Mo, the …
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Continuum supersonic gas jet enhanced focused electron beam induced deposition
… such that velocity may be tuned by nozzle temperature – either decreasing the temperature to increase sticking and prevent desorption, or increasing the temperature to increase surface diffusion (continuum jet induced 10x increase in surface diffusion) and deposition purity (heated …
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Evaluating Overheating Preventative Measures in Residential Buildings and Passive Survivability
… internal heat loads. Additionally, indoor air temperatures are impacted by solar heat gain from glazed openings and heat transmitted by conduction through exterior wall surfaces. Natural ventilation strategies can reduce indoor air temperatures and increase air velocities close to the skin. …
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Study of low energy Ytterbium atom-ion charge transfer collisions using a surface-electrode trap
… 2.2x 10-5 eV to 4.3x 10-3 eV, corresponding to effective temperature from 250 mK to 50 K. The charge transfer collisions are observed by spatially overlapping the 172yb+ ions in the surface-electrode trap and 174Yb atoms in the magneto-optical trap, and measuring ion loss. We confirm that, in …
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Spectroscopy of white dwarf stars observed by HETDEX.
… from the Gaia space observatory, to determine effective temperature and surface gravity of this unique magnitude-limited sample.
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The effective temperatures and physical properties of red supergiants : the effects of metallicity.
… MARCS stellar atmosphere models to determine the effective temperatures of 74 red supergiants (RSGs) in our galaxy, 39 RSGs in the Small Magellanic Cloud (SMC), and 36 RSGs in the Large Magellanic Cloud (LMC). The new effective temperature scales derived from these data are significantly warmer …
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Investigation of the cooling characteristics of rotating liquids
… of heat transfer was derived and the maximum gas effective temperature predicted. For the conditions used in this investigation the following enumerated results can be stated: 1) The computed coefficient of heat transfer between cooling passage wall and water is 3850 Btu/(hr)(sq ft) (°F). 2) The …
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Toward quantum opto-mechanics in a gram-scale suspended mirror interferometer
… gravitational wave interferometer -- yielding an effective temperature of 1.4 microkelvin and a phonon occupation number of 234 in a kilogram-scale oscillator. Then we analyze the displacement noise spectrum in the gram-scale system, which is currently limited by thermally driven fluctuations of …
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Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak
Energetic minority protons with -100 keV effective temperature are routinely created in Alcator C-Mod plasmas with the application of ICRF. A new multi-channel Compact Neutral Particle Analyzer is used to make measurements of these distributions in Alcator C-Mod's unique and reactor-relevant …
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Enzymatic degradation of egg yolk cholesterol
… with the other cholesterol oxidases. The most effective temperature was 37°C for Bs cholesterol oxidase, and 45°C for the other cholesterol oxidases. The enzyme derived from Pseudomonas fluorescens had an effective temperature range from 15 to 60°C, and from 5 to 37°C it was clearly superior to …
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The mode-dependent dynamics of nonlinear nanomechanical resonators
… As a measure of drive magnitude, we vary an effective temperature to explore the linear and nonlinear stochastic dynamics of a doubly-clamped nanoresonator. Using similitude and the Fluctuation-Dissipation theorem, we show that varying the effective temperature of the synthetic noise offers a …
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Improving the Fanger model's thermal comfort predictions for naturally ventilated spaces
… A sensitivity analysis revealed that the comfort temperature prediction is by far most sensitive to the comfort value of mean skin temperature. Furthermore, the sensitivity analysis also indicated that for the Fanger model to produce better comfort temperature predictions for naturally ventilated …
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Tunneling Dynamics of a Bose-Einstein Condensate
… cooling is used to achieve the extremely low temperatures required for the tunneling time experiments. A 2.4x reduction in the atomic velocity spread is demonstrated, reducing the rms velocity spread to \SI{0.46(5)}{mm/s}. This corresponds to cooling to an effective temperature of …
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The use of silicone resins as non-wetting files on heating surfaces
… o.d., 21” mild steel tubes, 12 B.W.G., having an effective heating area of 1.113 ft.<sup>2</sup>. The operating conditions for the test were steam, 85% quality, at 45.75-46.25” Hg. abs. and body pressure of 7.8-8.5” Hg. abs. giving an effective temperature drop of 80-85°F. Evaporator feed for the …
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Development of Ion Mobility Mass Spectrometry Instrumentation to Investigate the Gas-Phase Structures of Protein and Protein Complex Ions
… RF potentials have minimal effects on the effective temperatures of gas-phase ions. The RF-confining drift cells was used to report collision cross sections for 349 ions, 155 of which are for ions that have not been characterized previously using IM. The effects of ionization conditions and …
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Severe plastic deformation in highly immiscible copper alloys: self-organization
… models like the “Driven System Model” and “Effective Temperature Model” can explain existing experimental results for alloys systems with low to moderate heat of mixing, such as Cu-Ag, under SPD. For systems with high heats of mixing, however, e.g. the Cu-Nb, and Ni-Ag system, the previous …
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Fully Distributed Multi-parameter Sensors Based on Acoustic Fiber Bragg Gratings
… span, but their limited applicable parameters (temperature and strain) and costly interrogation systems have prevented their widespread applications. A novel concept of acoustic fiber Bragg grating (AFBG) is conceived with inspiration from optical fiber Bragg grating (FBG). This AFBG structure …
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Experimental measurements and numerical modeling of fast-ion distributions in the Alcator C-Mod Tokamak
… will reveal strong dependences of the fast-ion effective temperature on both electron density and plasma current. For further analysis, we use the simulated distributions generated by the coupled full-wave spectral solver AORSA, with the zero orbit-width bounce-averaged Fokker-Planck code CQL3D. …
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