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Showing 1 to 9 of 9 for “"Beta process"”.
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Secondary relaxation processes in neat and binary glass formers studied by 2H NMR spectroscopy
… substances. We focus on the Johari-Goldstein beta-process, which not only plays a key role for the understanding of glassy dynamics in neat systems, but also in binary mixtures thereof. The first part is devoted to the plastic crystalline (PC) phase of cyanocyclohexane. A 2D 2H NMR assessment …
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Dielectric Properties of Molecular Glass Formers; from the Liquid State to the Tunneling Regime
… systems above Tg. Here, secondary relaxation processes emerge on the high frequency side of the main (alpha) relaxation peak, namely the excess wing (EW) and the beta-process. The EW manifests itself in the dielectric spectra as a power-law, while beta-process as a second relaxation peak. A …
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Nonparametric Bayesian Dictionary Learning and Count and Mixture Modeling
… measures, a family of pure-jump stochastic processes with nonnegative increments. In particular, we study dictionary learning for sparse image representation using the beta process and the dependent hierarchical beta process, and we present the negative binomial process, a novel …
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Study of relaxation processes in simple glass formers by means of 2H NMR spectroscopy
… study the properties of the secondary relaxation processes (beta-processes) in the glassy state (0.5Tg<T<Tg). For several systems we also acquired NMR data at temperatures corresponding to the supercooled liquid state (T>Tg) providing information on the main relaxation process (alpha-process). In …
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Primary and Secondary Relaxations in Neat and Binary Glass Formers Studied by Means of Dielectric Spectroscopy
… gain insight into the microscopic origin of the beta-process (a secondary relaxation observed for T<Tg) in neat and binary systems, as well as the primary relaxation phenomena in binary systems. The results of all investigations are collected in six partially interrelated publications. Three …
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Nonparametric Bayesian Modelling in Machine Learning
… Bayesian non-parametric inference. The Dirichlet process and its extensions are priors on an infinite-dimensional space. Originally introduced by Ferguson (1983), its conjugacy property allows a tractable posterior inference which has lately given rise to a significant developments in applications …
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A study of the mechanisms of milling-induced enhancement of solubility and dissolution rate of poorly soluble drugs
… whereas thermal techniques require a heating process, which tend to induce de-vitrification and mutarotation of lactose. In case of anhydrous materials, while there was agreement between thermal and THz techniques at long milling times, it was shown that the THz technique was susceptible to …
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Improving the safety and efficacy of bimodal electric tissue ablation.
Introduction: Bimodal electric tissue ablation (BETA) is a new method of ablation, which combines the process of electrolysis with radiofrequency ablation (RFA) to increase the size of tissue ablations. The cathode of the electrolytic circuit is connected to the radiofrequency (RF) electrode to …
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Machine Learning and Bayesian Statistics for Seismic Compressive Sensing
… problems in later stages of the seismic signal processing work flow via aliasing or incoherent noise and thus signal reconstruction is necessary. Modern algorithms utilise the principle of Compressive Sensing (CS) for reconstruction which uses the assumption that the signal of interest is either …