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 106 for “"decay rates"”.
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Wisconsinan Geochronological Determinations Based Upon Amine Decay Rates
Made available in DSpace on 2014-12-04T19:14:16Z (GMT). No. of bitstreams: 1 6202972.pdf: 1879914 bytes, checksum: 8445ae141354cd70c1fc164a945328d7 (MD5) Previous issue date: 1962
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The Effect of Pressure on Decay Rates of Organic Phosphors
Made available in DSpace on 2014-12-05T17:15:36Z (GMT). No. of bitstreams: 1 6104300.pdf: 2874263 bytes, checksum: 2e24b406da7b8ce9f4788cf63b8c620b (MD5) Previous issue date: 1961
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Precise energy decay rates for some viscoelastic and thermo-viscoelastic rods
… coupling) may not improve the rate of energy decay. The situation where the viscoelastic stress relaxation modulus decreases to its (positive) equilibrium modulus at a subexponential rate, e.g., like (1 + t)<sup>-x</sup> + E, where α > 0, E > 0 is examined. In this case, the nonoscillatory …
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Measurement of the relative partial decay rates for K+ -> pi+pi+pi-
… Synchrotron to measure the relative partial decay rates of positive and negative kaons decaying in the tau mode, K+ -> pi+pi+pi-. The ratio measured was If [equation] differs from unity» there is a CP violation in the weak process K+ -> (3pi)+/- due to the presence of parity conserving …
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Examining Fluorescent Decay Rates For Microbial Source Tracking In South Carolina Blackwater Systems
… significant relationships between fluorescent decay signals and E. coli contamination, and examine fluorescent decay protocol applicability to blackwater systems.</p> <p> Escherichia coli concentrations within the Gills Creek watershed could be attributed to industrialization around sampling …
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An investigation into the phenomenological relation between solar activity and nuclear beta-decay rates
… experimental evidence for time-varying nuclear decay rates, in contrast to the widely-accepted view that nuclear decaying isotopes disintegrate at a constant rate unaffected by external conditions. We study several past cases of radioactive isotopes exhibiting annual periodicities in their decay …
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A comparison of the positive and negative TAU prime partial decay rates for kaons
… Synchrotron to study T' (K+/- -> pi+ pio pio) decays. ...
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Measurement of the Relative Partial Decay Rates for Positive and Negativekaons Decaying Into the Tau-Mode
Made available in DSpace on 2015-05-12T21:41:44Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6808073.PDF: 2773545 bytes, checksum: 2c4f45e1dabf53a3ea1aeb3fd4a1f34b (MD5) Previous issue date: 1967
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Global analysis of mRNA decay rates and RNA-binding specificity reveals novel roles for CUGBP1 and PARN deadenylase in muscle cells
… organisms, the possibility that defects in mRNA decay contribute to DM1 pathogenesis has not been investigated to date. As such, we sought to further characterize the roles of CUGBP1 and its partner, the deadenylase PARN, in mRNA decay in mouse C2C12 muscle cells. The TNF message, which encodes a …
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Interspecific wood trait variation predicts decreased carbon residence time in changing forests
… with compositional shifts. While interspecific decay variation is widely reported, the implications of forest compositional change on ecosystem-level deadwood decay and consequently, the future of a globally significant C pool have not been previously explored. 2. Leveraging a 25-year treefall …
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Parameter recovery for transient signals
… arise in numerous disciplines for which the decay rates and amplitudes carry some informational significance. Even when the decay rates are known, solving for the amplitudes results in an ill-conditioned formulation. Transient signals in the presence of noise are further complicated as the …
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A comparison of CP violation in the decays K0 → π+ π- and K-0 → π+ π-
The time dependence of the decay rates K0 -+- TI and -K0 - +- ~ TI was measured in order to test the validity of current formulations of OP violations. An enriched kaon beam at Argonne National Laboratory was used to produce KO (ft) by charge exchange of 850 MeV/c K+ (K-) on complex nuclei. …
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Statistical response predictions in complex systems with dissipation
… Both the statistical distribution of modal decay rates and the effect of dissipation on the intermodal correlations of natural frequency spectra are explored. It is found that for moderate damping the modal decay rates of complex systems are distributed according to a modified chi square …
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mRNA stability in soma and neurites of cultured neuronal cells
… neurites is poorly understood. To determine mRNA decay rates, we analyzed the subcellular transcriptomes of neural projections and soma of mouse neuronal cells following inhibition of transcription with actinomycin-D. Less stable transcripts were enriched for GU-rich elements in their 3' UTRs. …
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Microbial Communities Colonizing Leaves during Early Decomposition Stages
<p>Microbial communities associated with decaying leaves play an important role in the cycling of nutrients in stream ecosystems. In headwater streams that are deemed as heterotrophic, bacteria and fungi are main drivers of organic matter decomposition and thus partly responsible for facilitating …
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Experimental Sensitivity Analysis and Control of Thermoacoustic Systems in the Linear Regime
… have the most influence on the linear growth and decay rates as well as oscillation frequency observed during periods of linear growth and decay. Therefore, adjoint-based methods could prove to be a valuable tool for developing optimal passive control solutions. This thesis aims to develop novel …
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Studies of Radiation Effects in Three High Polymers
… made at later times to determine the radical decay rates. The radical decay rates were highly varied and did not conform to first-order or second-order decay kinetics, due to the simultaneous presence of several different radical species. due to irradiation were observed. The radical decay …
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Tailoring light with photonic crystal slabs : from directional emission to topological half charges
… formalism to derive bounds on the asymmetric decay rates to top and bottom of a photonic crystal slab, for a resonance with arbitrary in-plane wavevector. We then employ this formalism to inversion symmetric structures, and show through numerical simulations that asymmetries of top-down decay …
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Groundwater Thresholds for Root Decomposition and the Relation to Barrier Island Ecological State Changes
… USA, thresholds to belowground decomposition rates were identified by measuring decay of native roots and rhizomes at 32 elevations in relation to mean annual groundwater levels (-0.356 – 1.937 m). Negative exponential decay rates (k = 0.310 – 0.915 yr<sup>-1</sup>) varied according to average …
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The impact of nutrient availability, substrate characteristics, and environmental conditions on wood decay and microbial decomposer communities
… and nutrients globally, and understanding the decay of that wood is critical for estimating rates of global nutrient and carbon cycling. Nutrient availability is important for driving decay rates as decomposers need nutrients to produce wood decay enzymes. My dissertation first explores the …
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