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 322 for “"temperature measurements"”.
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Gas temperature measurements by ultrasonic pulse method
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1955.
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Unsteady surface heat flux and temperature measurements
… measure the time-resolved surface heat flux and temperature from a turbulent combustion flame impinging on a surface. Using the analytical semi-infinite conduction model, the unsteady surface heat flux was calculated from the transient temperature measurements and the surface temperature was …
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Noninvasive Temperature Measurements Using Electron Paramagnetic Resonance Spectroscopy
… that may be used for non-invasive in vivo temperature measurements in living systems. We use the nitroxide, 3-doxyl-5$\alpha$-cholestane, mixed in 1 mol% cholesterol and 99 mol% methyl docosanoate and encapsulated in proteinaceous microspheres (average diameter $<$2 $\mu$m). We have shown a …
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Extended Surface Heat Transfer Coefficients via Endwall Temperature Measurements
… computation of heat transfer rates via pin base temperature measurements via Temperature Sensitive Paint, or similar non-intrusive methods. Verification of this method is done with comparisons to the solution of infinite fins with internal heat generation, conjugate computational results, and …
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Estimation of Unsteady Nonuniform Heating Rates from Surface Temperature Measurements
… impinge on a test cylinder, where the temperature due to the heat flux is measured. These measurements are used to estimate the heat flux on the surface as a result of the shock interactions. The nature of the incident flux usually involves dynamic transients and severe nonuniformities. …
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Direct Ion-Temperature Measurements Using High-Resolution Inelastic X-ray Scattering
Temperature in high-energy-density (HED) materials has been a long-standing problem. Direct temperature measurements are challenging because HED samples are often opaque and have extremely short lifetimes. Historically, ion temperature has been inferred from structural measurements that serve only …
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Nanometer-scale temperature measurements of phase change memory and carbon nanomaterials
… in new electronic devices. Comparing measurements and predictions of CVD graphene heating predicted the resistivity, voltage drop, and temperature rise across the one dimensional (1D) GB defects. This work measured the nanometer-scale temperature rise of thin film Ge2Sb2Te5 (GST) based …
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Temperature measurements in a flow using laser induced fluorescence of oxygen
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Mass flow and temperature measurements in the flue of a woodburning appliance
… loss due to the flue gases being at a higher temperature than the ambient. 2. Chemical energy loss from incomplete combustion. 3. Latent energy loss due to water existing as a vapor in the flue gas. This loss is included since the higher heating value of wood is used. The instantaneous …
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An Approach to Thermocouple Temperature Measurements that Reduces Uncertainties Associated with Radiative Corrections
<p>Obtaining accurate temperature measurements in flame environments with thermocouples is extremely challenging due to the effects of radiative heat loss. These losses are difficult to quantify and often cannot be corrected for or minimized without sacrificing spatial resolution. In this work, a …
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Development of Fiber Optic Sensors using Femtosecond Laser for Refractive Index and Temperature Measurements
… for measurement of ambient refractive index and temperature. The femtosecond laser operating at 780 nm with pulse duration of 172 fs and pulse repetition rate of 1 kHz is used to study bulk index modification and fabricate fiber long period and short period gratings. Effective and reliable …
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On temperature measurements and analysis in electron beam additive manufacturing using near infrared thermography
… the ability to accurately measure process temperatures is necessary before process models can be validated and closed-loop feedback control systems can be developed. Knowledge of the cooling rates experienced by the part during fabrication is also essential for the development of predictive …
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Low -Frequency 1/F Noise: Low Temperature Measurements and Effect on Superconducting Qubit Dephasing
… work is to measure this noise as a function of temperature and to simulate its effect on the measurement dynamics associated with superconducting qubits. In Nb trilayer junctions we measure the noise power at 1 Hz down to 10 mK and verify a T2 dependence for T > 1 K, below which we observe a …
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Low-frequency 1/f noise : low temperature measurements and effect on superconducting qubit dephasing
… work is to measure this noise as a function of temperature and to simulate its effect on the measurement dynamics associated with superconducting qubits. In Nb trilayer junctions we measure the noise power at 1 Hz down to 10 mK and verify a T2 dependence for T > 1 K, below which we observe a …
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Depletion, quantum jumps, and temperature measurements of ⁸⁸Sr⁺ ions in a linear Paul Trap
… the spectrum to a Voigt function yielded an ion temperature of 35 mK. To avoid blue-broadening, we set up blue and red laser pulse sequences. This allowed us to observe a red spectrum with secular sidebands and calculate an ion temperature of 6.8 +4.4 / -2.2 mK.
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Monochromator-based absolute calibration of radiation thermometers for thermodynamic temperature measurements of high-temperature fixed-points
… Strahlungsgesetz und ausgehend von den Temperaturen des erstarrenden Silber, Gold oder Kupfers definiert ist. Alternativ dazu erlaubt die absolute radiometrische Strahlungsmessung eine direkte Temperaturbestimmung rückgeführt auf ein kryogenes elektrisches Substitutionsradiometer als …
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