Results 221 to 230 of about 64,082 (265)
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Fluctuations and scaling in aggregation phenomena
Physical Review B, 2000We introduce a method which enables us to isolate different sources of fluctuations during a typical aggregation process. As an example, we focus on the evolution of islands during irreversible submonolayer epitaxy. We show that only spatial fluctuations in island nucleation are required to produce the scaling of their size distribution as determined ...
C. Ratsch +4 more
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SAXS investigation on aggregation phenomena in supercritical CO2
The European Physical Journal E, 2002Synchrotron Small-Angle X-Ray scattering (SAXS) measurements on aggregate formation of a Polyvinyl acetate- b-Perfluoro octyl acrylate (PVAc- b-PFOA) block copolymer in supercritical CO(2) are here reported. Experiments were carried out for a series of different thermodynamic conditions, changing the solvent density by profiling both the pressure at ...
Lo Celso F +7 more
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Protein Folding and Aggregation Phenomena
AIP Conference Proceedings, 2003A simple lattice protein model is used to study the effects of aggregation phenomena on protein folding. Folding kinetics of non‐isolated protein molecules is studied: different molecules can interact each other and, in competition with folding, aggregation (formation of a dimer) can occur.
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Aggregation phenomena and fractal structures
Physica A: Statistical Mechanics and its Applications, 1986Abstract In disordered aggregation processes fractal structures appear in a natural way. Many of their properties can be characterised in terms of scaling and numerous models have been introduced to describe different physical situations. “Clustering of Clusters” is a model applicable to several growth processes in colloid science and elsewhere.
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Dynamic Scaling in Aggregation Phenomena
1985The dynamics of the diffusion-limited cluster-cluster aggregation model (CCA) is reviewed through the temporal evolution of the cluster size distribution ns(t), which is the number of clusters of size s at time t. In recent studies it was shown that the results of the Monte-Carlo simulations can be well represented by a dynamic scaling function of the ...
Fereydoon Family, Tamas Vicsek
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Light scattering studies of aggregation phenomena
Physica A: Statistical Mechanics and its Applications, 1995Abstract We present recent results in the field of colloidal aggregation. We first present static light scattering data of aggregation in intermediate regimes between RLCA and DLCA. In particular, we show that working with dense solutions, new and unexpected features are observed.
D. Asnaghi +3 more
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Oxygen Aggregation Phenomena in Silicon
MRS Proceedings, 1987ABSTRACTOxygen precipitation in Czochralski silicon heated in the range 400–1050°C is reviewed. For T≥525° C, Si02 particles form at the normal diffusion rate and there is generation of self-interstitials. At the lower temperatures, the existence of the interfacial energy causes an apparent increase in the solid solubility as the agglomerates become ...
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Aggregation phenomena in the suspension polymerization of VCM
Colloid & Polymer Science, 1990In the suspension polymerization of VCM, insoluble polymer particles are formed inside the monomer droplets. The growth and aggregation of these particles are responsible for important polymer properties, such as porosity. It is well established that the most characteristic polymer particles, the primary particles, are of a narrow distribu- tion with a
E. Diamadopoulos +2 more
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Wetting phenomena and colloidal aggregation in binary mixtures
Physical Review A, 1990Recent experiments on colloidal suspensions of silica spheres in a water-lutidine mixture close to the consolute point have revealed interesting sphere-aggregation behavior that has been linked to wetting phenomena. We carry out a theoretical analysis of the phase behavior in such mixtures and suggest that the observed behavior is consistent with ...
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Aggregating Spatio-temporal Phenomena at Multiple Levels of Detail
2015Spatio-temporal data are collected at high levels of detail (LoDs). Both spatial and temporal characteristics of data can be expressed at different LoDs. Depending on the phenomenon and the analytical goal, different LoDs can be suitable for a user’s analysis since different LoDs may provide different perceptions of a phenomenon. It is crucial to model
Ricardo Almeida Silva +3 more
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