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 28 for “"relaxation properties"”.
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Transport and relaxation properties in anisotropic superconductors
… give a detailed calculation of the nuclear spin relaxation time (T1 ) in anisotropic superconductors. It is shown that besides the power-low like behavior at intermediate temperatures, a Korringa-like behavior shows up at very low temperatures if resonant non-magnetic impurity scattering effect …
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Electronic Relaxation Properties of Gadolinium Based MRI Contrast Agents
Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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Relaxation Properties of a Dual Labeled Boron and Gadolinium Agent, Gd(III)- Diethylenetriaminepentaacetate-carborane
Made available in DSpace on 2017-07-06T18:59:04Z (GMT). No. of bitstreams: 3 Tatham_Alicia_T_MS.pdf: 34121853 bytes, checksum: 46bed3bce692549cefb1e49ab1643d84 (MD5) Tatham_Alicia_T_MS_ABS.pdf: 979632 bytes, checksum: c89af05a29d395ad19688668124cea35 (MD5) license.txt: 4813 bytes, checksum: …
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Driven Magnetic Flux Lines in Type-II Superconductors: Nonequilibrium Steady States and Relaxation Properties
… centers and the aging dynamics of nonequilibrium relaxation process in the presence of weak point pinning centers. We employ a three-dimensional elastic line model and Metropolis Monte Carlo simulations. For the first part, we characterize the system by means of the force-velocity / …
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Quantification of the Elastic and Relaxation Properties of Human Tunica Albuginea under Biaxial Loading
… disadvantages. Quantification of the material properties of the tunica tissue can inform potentially improved treatments. In this study tunica tissue (n=5) from donors were tested biaxially along the circumferential and longitudinal directions to a specified load magnitude and maintained at a …
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I. Solubility and blend studies of nitrocellulose II. Relaxation properties of thin film coatings: the role of surface topography
… thermal analysis were used to evaluate the relaxation properties of thin film polysulfone coatings and the effect of substrate surface topography on these properties. Both dynamic mechanical and dielectric thermal analysis revealed that the topographical nature of the substrate influenced …
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Non-Equilibrium Relaxation Dynamics in Disordered Superconductors and Semiconductors
We investigate the relaxation properties of two distinct systems: magnetic vortex lines in disordered type-II superconductors and charge carriers in the Coulomb glass in disordered semiconductors. We utilize an elastic line model to simulate magnetic flux lines in disordered type-II superconductors …
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High Pressure Nmr Studies of the Dynamics of Fluids and Fluid Mixtures (Supercritical, Dimethyl-Sulfoxide, Diffusion)
… projects which examine the transport and relaxation properties of a number of fluids and fluid mixtures as a function of temperature and pressure. The common denominator of these projects is the use of pressure as an essential variable in studies of the dynamic structure of fluids. The use …
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Nonequilibrium Relaxation and Aging Scaling Properties of the Coulomb Glass and Bose Glass
… scaling methods, we find that the nonequilibrium relaxation properties can be described sufficiently by a full-aging scaling analysis. The scaling exponents depend on both temperature and filling fraction, and are thus non-universal. We look at the trends of these exponents and found that as …
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Fluorinated Paramagnetic Probes for 19-F and 1-H MRS/ MRI
… defined. Notably, the 19-F magnetic resonance relaxation processes for the complexes have been assessed, allowing for the analysis of the interplay between applied field, Ln(III) ion and rotational correlation time on relaxation properties. Strategies employed to enhance signal intensity are …
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Small Gadolinium Oxide Contrast Agents: A Novel Class of Multi-Modality Contrast and Therapeutic Agents
… MR contrast enhancement and X-ray attenuation properties of small particulate gadolinium oxide and gadolinium oxide albumin microspheres for MR and CT imaging is presented. MR relaxometry and nuclear magnetic relaxation dispersion (NMRD) characterization of the water-proton relaxation …
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Effects of swelling on brain tissue mechanical properties by indentation
… effects of swelling on the tissue’s mechanical properties. The stiffness and relaxation properties of brain tissue slices are identified, suggesting a useful and simple alternative to in vivo imaging for identifying the effects of diseases such as edema or hydrocephalus on the brain.
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Characterizing Muscle and Subcutaneous Adipose Tissue Imaging Phantoms for NMR Application
… phantom for validation. Here, we describe the T2 relaxation properties of an emulsified two-phase imaging phantom for validating a nuclear magnetic resonance (NMR) sensor for measuring fluid volume in vivo. The phantoms simulate muscle and subcutaneous adipose tissues (SCAT) and assure the …
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Material Properties of the Grade 300 and Grade 270 Prestressing Strands and their Impact on the Design of Bridges
… of this thesis was to test the material properties of the new Grade 300, low-relaxation prestressing strand. The purpose of this testing was to verify the advertised breaking strengths and relaxation properties of the Grade 300 strand. Additional properties, such as yield strength, …
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Chip-scale atomic magnetometer based on free-induction-decay
… was implemented further to measure the spin relaxation properties intrinsic to the sensor head, useful in determining the optimal buffer pressure that extends the spin lifetime and improves the sensor's sensitivity performance.
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Supramolecular approaches to cryorelaxors for biological NMR studies
… approaches to the problem of low temperature relaxation agents, particularly those based on supramolecular systems. The next chapter describes the preparation, characterization, and studies of the behaviour of calixarene complexes incorporating potentially freely rotating guests. Ten …
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FLUORINATED RESPONSIVE LANTHANIDE COMPLEXES FOR MAGNETIC RESONANCE
… caused the fluorine longitudinal and transversal relaxation rates to be strongly enhanced. This allows faster MR signal acquisition, reducing the sample concentration and acquisition time required to obtain the desired signal intensity. The lanthanide ion also enhanced the chemical shift …
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Aging processes in complex systems
… types of systems with simple and complex aging properties, namely reaction diffusion systems with a power growth law, driven diffusive systems with a logarithmic growth law, and a non-equilibrium polymer network that is supposed to capture important properties of the cytoskeleton of living …
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Positron interactions with oriented polymers and with chiral quartz crystals
… on the size and density of free volume and hole relaxation properties in polycarbonate (PC) and polymethylmethacrylate (PMMA); fundamental studies of polarized positron interaction with chiral crystals were also studied. Free volume relaxation in PC and PMMA with different levels of simple shear …
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Physiological Implications and Mechanisms of Estrogen Protection Associated With Myocardial Ischemia /Reperfusion Injury
… ventricular (LV) contractility (dP/dtmax) and relaxation properties (dP/dtmin) in all groups 2) administration of L-NNA or ICI 182,780 prior to E2 blocked protection. Results indicated that circulating E2 protects from I/R injury in a sex-independent, ER/eNOS-dependent manner. The effects of …
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