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.
Results
Showing 1 to 20 of 23 for “"steady-state measurements"”.
-
An Investigation into Improving the Repeatability of Steady- State Measurements from Nonlinear Systems. Methods for measuring repeatable data from steady-state engine tests were evaluated. A comprehensive and novel approach to acquiring high quality steady-state emissions data was developed
… and a software tool to improve the quality of steady-state emissions measurements from engine dynamometer tests. Literature shows state of the art instrumentation are necessary to monitor the cycle-by-cycle variations that significantly alter emissions measurements. Test methodologies that …
-
The rheo-optics of shear thickening and structure formation in polymer solutions
Simultaneous measurements of the optical and rheological response of solutions of polystyrene have been made, in-situ, in order to ascertain the connection between structure formation and the phenomenon of shear-thickening. Transient and steady state measurements of the viscosity, dichroism, …
-
Space-Time Kinetics of the AGN-201M Research Reactor at the University of New Mexico
A series of experimental measurements were performed on the AGN- 201M reactor (AGN) at the University of New Mexico. Steady-state measurements were made with the AGN in various delayed critical configurations. These delayed critical configurations are defined by moving the coarse and fine control …
-
The correlation of randomness with high tip losses in an axial flow fan stage
… A technique for quantifying randomness of an unsteady flow is developed, and the randomness of the surveyed flow is shown to correlate with the losses. A new method of ensemble averaging instantaneous data is presented which produces an identifiable blade passage profile even in a random …
-
Steady-state and second-sound measurements of Kapitza resistance
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T18:50:47Z No. of bitstreams: 1 1980_katerberg.pdf: 2270499 bytes, checksum: 43be2016e3e480be2f087f61ef3b8472 (MD5)
-
Reduced fan noise radiation from a supersonic inlet
… takeoff engine speeds under static conditions. Steady-state measurements of the inlet flow field were made along with far field acoustic measurements of the fan noise. The results show the new door geometry is successful in reducing circumferential flow distortion at the fan entrance by a factor …
-
Temperature-Dependent High-Speed Modulation and Wavelength Conversion Using Quantum-Well Lasers
… semiconductor lasers is presented. The steady-state measurement of gain is presented through four different approaches, including the direct (Hakki-Paoli) measurement of polarization-resolved spectra, correlation of gain and spontaneous emission, techniques for measuring the transparency …
-
Comparison of the aeroacoustics of two small-scale supersonic inlets
… inlets that are tested under static conditions. Steady state measurements of the aerodynamic flowfield and acoustic farfield were made in order to evaluate the aeroacoustic performance of the inlets. The aerodynamic results show the total pressure recovery of the two inlets to be nearly …
-
The blending and permeability of polymers for packaging applications
… Spectroscopy and rheology by dynamic and steady state measurements. Barrier properties were determined gravimetrically for water vapour and organic solvents, and for oxygen by an Oxtran apparatus. The results have shown that phase dispersion can be more easily explained by molecular …
-
Thermophoresis in Colloidal Suspensions
… flux can be recovered when the fluid is at steady-state. The results issuing from this description are then discussed and compared to other existing approaches, some of which are shown to neglect the hydrodynamic character of colloidal thermophoresis. Chapter 3 is dedicated to the validation …
-
Characterization of natural variation in steady- and non-steady-state photosynthesis and its underlying mechanisms to improve productivity in rice (Oryza sativa)
… understanding of photosynthesis has come through measurements made at a steady-state. However, these measurements fail to account for the constantly fluctuating light environment that is more commonly seen in agricultural field settings where steady-state conditions seldom occur. Steady-state and …
-
Effect of struts on aeroacoustics of axisymmetric supersonic inlets
… without simulating the inflight speed effects. Steady state measurements were made in order to evaluate the aerodynamic performance of the inlet. The aerodynamic results show that the movement of the struts to a new location allowed the strut wake to diffuse significantly before reaching the …
-
Reduction of Unsteady Rotor-Stator Interaction Using Trailing Edge Blowing
… of using trailing edge blowing to reduce unsteady rotor-stator interaction. Steady-state measurements of the aerodynamic flow field and acoustic far field were made in order to evaluate the aeroacoustic performance at three simulator speeds: 40%, 60%, and 88% of the design speed. The lowest …
-
Experimental and computational investigations of the stability and dynamics of cytochrome bb5s
… two spectroscopies supported a complex, three-state denaturation pathway, in contrast to the currently proposed two-state model.Fluorescence was used to determine mutational effects on protein dynamics. Steady-state measurements showed blue-shifted spectra for the mutants. Acrylamide quenching …
-
Free solution electrophoresis measurements and their theoretical relationships to net protein valence
… a unique test of theories.</p><p>Through MCE steady-state measurements, the effective valence (z eff) of both sets of mutants was determined under an ionic strength of 0.11 M at pH 7.5. Further experimentation with T4 lysozyme at low and high ionic strengths was done to investigate how well …
-
A Kinetic Investigation of the Mechanism of Muscle Contraction with a Series of Nucleotides
… experiments or in-vitro motility assays and pre-steady state measurements in solution give a constant value (4 ~ 6 nm), which is independent of the NTP structure (for ATP, CTP, mant-ATP and mant-CTP) and protein species (for acto-RS.HMM and acto-BV.myosin). This indicates that the geometric …
-
Cellular influence on protein folding
… the cell that are inaccessible by conventional steady-state measurements. Chapter 4 is a practical guide to improving the accuracy and reliability of Fluorescence Relaxation Imaging (FReI), our Fӧrster Resonance Energy Transfer (FRET) microscopy based technique for studying biomolecular kinetics …
-
The Mechanism of Chloride Activation of Oxygen Evolution in Spinach Photosystem Ii
… (PS II) was studied by $\sp{35}{\rm Cl}$-NMR and steady-state measurements of oxygen evolution. This study represents the first attempt to directly monitor ${\rm Cl}\sp-$ binding in spinach. At low light intensity, the ${\rm Cl}\sp-$ activation curve (Hill activity vs. (${\rm Cl}\sp-$)) shows …
-
Aeroacoustics of the bifurcated 2D supersonic inlet
… experiment was tested under static conditions. Steady state measurements of the inlet’s flow field and far field acoustic measurements of the fan noise were made to evaluate the aerodynamic and acoustic performance of the inlets respectively. The results show at approach fan speed (60 PNC), the …
-
Distributed parameter control of heat diffusion with solidification
… due to the complicated nature of the process. Measurements of the steel temperature cannot be made reliably due to the high temperatures and constant water spray in the caster. Even if feedback could be obtained, the temperature of the steel is governed by a nonlinear partial differential …
Page 1 of 2