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The investigation of the interfacial phase transitions in fluid systems with short-range intermetallic interactions are of great interest. The phenomena were studied in two systems exhibiting a liquid-liquid miscibility gap: at the fluid/wall interface in fluid KxKCl1-x and at the fluid/vacuum interface of the Ga1 xBix alloys. To characterize the interfacial changes of the ultra thin films (composition, thickness and their evolution with time) the spectroscopic ellipsometry was performed over a wide spectral range. Whereas in the experiments on KxKCl1-x an existing ellipsometer could be used, a completely new UHV-apparatus including the in-situ phase modulation ellipsometer had to be developed for Ga1 xBix alloys. For the KxKCl1-x system new results on complete wetting at solid-liquid coexistence as well as in the homogenous liquid phase (prewetting) are presented. The spectra show the typical F center absorption which indicates that the film is a salt-rich phase. The thickness strongly increases approaching the monotectic from 30 to 440 nm, which is in agreement with the tetra point wetting scenario. For this interpretation a quantitative description of the excess Gibbs energy has been developed. For the Ga1 xBix system the results on complete wetting, surface freezing and oscillatory interfacial instabilities are presented. The high-precision spectra have been recorded approaching the liquid-liquid miscibility. These spectra have been modeled using a Ga-Bi effective medium approximation for the substrate covered by a film of liquid Bi. The measurements give evidence of tetra point wetting in the Ga-Bi system. First ellipsometric study of the surface freezing in Ga-Bi has been performed. Within the miscibility gap a very interesting effect of surface and bulk oscillatory instability was observed. The details of this process at present are not well understood, but a qualitative description is given.
molten salt --- surface phase transition --- spectroscopic ellipsometry --- Ga-Bi alloys
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Aggregation (Chemistry) --- Clustering of particles --- Particles --- Precipitation (Chemistry) --- Clustering --- chemistry --- biology --- materials science --- aggregates --- aggregation --- Chemical Precipitation --- Precipitation, Chemical --- Phase Transition
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Publishes scientific articles related to the structural science of compounds and materials in the widest sense. Knowledge of the arrangements of atoms, including their temporal variations and dependencies on temperature and pressure, is often the key to understanding physical and chemical phenomena and is crucial for the design of new materials and supramolecular devices.
Crystallization --- Crystallography --- Chemical structure --- Chemical structure. --- Crystallization. --- Crystallography. --- Leptology --- Structure, Chemical --- Crystallographies --- Crystal Growth --- Polymorphic Crystals --- Crystalline Polymorphs --- Polymorphism, Crystallization --- Crystal, Polymorphic --- Crystalline Polymorph --- Crystallization Polymorphism --- Crystallization Polymorphisms --- Crystals, Polymorphic --- Growth, Crystal --- Polymorph, Crystalline --- Polymorphic Crystal --- Polymorphisms, Crystallization --- Polymorphs, Crystalline --- Physical sciences --- Mineralogy --- Chemistry --- Chemistry, Physical and theoretical --- Separation (Technology) --- Matter --- Transition Temperature --- Phase Transition --- Constitution
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Crystallization --- Crystallography --- Chemical structure --- Chemical structure. --- Crystallization. --- Crystallography. --- Crystallographies --- Crystal Growth --- Polymorphic Crystals --- Crystalline Polymorphs --- Polymorphism, Crystallization --- Crystal, Polymorphic --- Crystalline Polymorph --- Crystallization Polymorphism --- Crystallization Polymorphisms --- Crystals, Polymorphic --- Growth, Crystal --- Polymorph, Crystalline --- Polymorphic Crystal --- Polymorphisms, Crystallization --- Polymorphs, Crystalline --- Leptology --- Structure, Chemical --- Chemistry --- Chemistry, Physical and theoretical --- Separation (Technology) --- Transition Temperature --- Phase Transition --- Physical sciences --- Mineralogy --- Matter --- Constitution
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Probabilities. --- Phase transformations (Statistical physics) --- Measure theory. --- Lebesgue measure --- Measurable sets --- Measure of a set --- Algebraic topology --- Integrals, Generalized --- Measure algebras --- Rings (Algebra) --- Phase changes (Statistical physics) --- Phase transitions (Statistical physics) --- Phase rule and equilibrium --- Statistical physics --- Probability --- Statistical inference --- Combinations --- Mathematics --- Chance --- Least squares --- Mathematical statistics --- Risk --- Gaussian Fields. --- Gibbs Measures. --- Markov Chains. --- Phase Transition. --- Statistical Mechanics.
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During the past fifteen years there has been a dramatic increase in the number of different surfaces whose structures have been determined experimentally. For example, whereas in 1979 there were only 25 recorded adsorption structures, to date there are more than 250. This volume is therefore a timely review of the state-of-the-art in this dynamic field. Chapter one contains a compilation of the structural data base on surfaces within a series of tables that allows direct comparison of structural parameters for related systems. Experimental structural trends amongst both clean surfaces and ad
Physics --- Surface chemistry --- Surfaces (Physics) --- Cohesion. --- Surfaces (Technology) --- Adhesion --- Cohesion --- 538.91 --- 538.97 --- 538.97 Special geometry and interaction with particles and radiation --- Special geometry and interaction with particles and radiation --- 538.91 Structures, including transitions --- Structures, including transitions --- Bond formation --- Crystal structure --- Phase transition --- Reactivity (chemical) --- Surface structure
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The characterization of the physical and chemical properties of transition metals and their compounds under extreme conditions of pressure and temperature has always attracted the interest of a wide scientific community. Their properties have numerous implications in fields ranging from solid-state physics, chemistry, and materials science to Earth and planetary science. The present Special Issue represents a good example of such a broad interest and shows some of the latest advancements in the investigation of transition metals under extreme conditions of pressure and temperature.
vanadate --- kagome compound --- high pressure --- X-ray diffraction --- equation of state --- iodate --- infrared spectroscopy --- phase transitions --- grain refinement --- mechanical properties --- commercial purity aluminum --- zirconium --- Nb3Sn --- local atomic structure --- XAFS --- melting curves --- laser-heated diamond anvil cell --- extreme conditions --- synchrotron radiation --- transition metals --- iridium --- laser heating --- density-functional theory --- melting --- radial-distribution function --- quantum molecular dynamics --- melting curve --- solid–solid phase transition boundary --- multi-phase materials --- phase relation --- Earth’s core --- iron alloys --- high-pressure --- high-temperature --- thermodynamics --- eutectic spacing --- Al-Si alloy --- superheat --- electrical resistivity --- iron sulfides --- high temperature --- Ganymede --- thermal convection --- creep testing --- ME21 --- magnesium alloy --- size effects --- miniature specimen --- PbTe --- substitutional disorder --- thermal expansion --- bulk modulus --- atomic displacement --- low temperature --- compression --- Debye temperature --- n/a --- solid-solid phase transition boundary --- Earth's core
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Fuzzy Logic is a good model for the human ability to compute words. It is based on the theory of fuzzy set. A fuzzy set is different from a classical set because it breaks the Law of the Excluded Middle. In fact, an item may belong to a fuzzy set and its complement at the same time and with the same or different degree of membership. The degree of membership of an item in a fuzzy set can be any real number included between 0 and 1. This property enables us to deal with all those statements of which truths are a matter of degree. Fuzzy logic plays a relevant role in the field of Artificial Intelligence because it enables decision-making in complex situations, where there are many intertwined variables involved. Traditionally, fuzzy logic is implemented through software on a computer or, even better, through analog electronic circuits. Recently, the idea of using molecules and chemical reactions to process fuzzy logic has been promoted. In fact, the molecular word is fuzzy in its essence. The overlapping of quantum states, on the one hand, and the conformational heterogeneity of large molecules, on the other, enable context-specific functions to emerge in response to changing environmental conditions. Moreover, analog input–output relationships, involving not only electrical but also other physical and chemical variables can be exploited to build fuzzy logic systems. The development of “fuzzy chemical systems” is tracing a new path in the field of artificial intelligence. This new path shows that artificially intelligent systems can be implemented not only through software and electronic circuits but also through solutions of properly chosen chemical compounds. The design of chemical artificial intelligent systems and chemical robots promises to have a significant impact on science, medicine, economy, security, and wellbeing. Therefore, it is my great pleasure to announce a Special Issue of Molecules entitled “The Fuzziness in Molecular, Supramolecular, and Systems Chemistry.” All researchers who experience the Fuzziness of the molecular world or use Fuzzy logic to understand Chemical Complex Systems will be interested in this book.
fuzzy logic --- complexity --- chemical artificial intelligence --- human nervous system --- fuzzy proteins --- conformations --- photochromic compounds --- qubit --- protein dynamics --- conformational heterogeneity --- promiscuity --- fuzzy complexes --- higher-order structures --- protein evolution --- fuzzy set theory --- artificial intelligence --- GCN4 mimetic --- peptides–DNA --- E:Z photoisomerization --- conformational fuzziness --- photoelectrochemistry --- wide bandgap semiconductor --- artificial neuron --- in materio computing --- neuromorphic computing --- intrinsically disordered protein --- intrinsically disordered protein region --- liquid–liquid phase transition --- protein–protein interaction --- protein–nucleic acid interaction --- proteinaceous membrane-less organelle --- fuzzy complex. --- d-TST --- activation energy --- Transitivity plot --- solution kinetic --- Maxwell–Boltzmann path --- Euler’s formula for the exponential --- activation --- transitivity --- transport phenomena --- moonlighting proteins --- intrinsically disordered proteins --- metamorphic proteins --- morpheeins --- n/a --- peptides-DNA --- liquid-liquid phase transition --- protein-protein interaction --- protein-nucleic acid interaction --- Maxwell-Boltzmann path --- Euler's formula for the exponential
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"A survey of the criticality hypothesis which imports theory from physics to understand the brain and could be a grand unifying theory of the brain at a time when neuroscience is dominated by data"--
Neurosciences --- Cryogenics --- Neural networks & fuzzy systems --- Critical point --- Phase transition --- Cortex --- Neuronal avalanche --- Power law --- Homeostasis --- Optimality --- Universality --- Epilepsy --- Neural network --- Computational neuroscience --- Neuroscience --- Information theory --- Electrophysiology. --- Cerebral cortex. --- Brain. --- Neurology. --- SCIENCE / Life Sciences / Neuroscience --- SCIENCE / Physics / General --- COMPUTERS / Data Science / Neural Networks --- Medicine --- Nervous system --- Neuropsychiatry --- Cerebrum --- Mind --- Central nervous system --- Head --- Brain mantle --- Cortex, Cerebral --- Cortex cerebri --- Mantle of brain --- Pallium (Brain) --- Telencephalon --- Diseases
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Following new developments in the measurement of gravitational waves from neutron–star mergers and the modification or construction of particle colliders to reach larger densities, we are entering a new era, during which we can begin to understand dense and hot matter for the first time. This, together with future supernova explosion data, will provide us with the opportunity to have truly multimessenger data on hot and dense matter, which is, to some extent, similar to the matter present in the core of proto-neutron stars. This Special Issue focuses on the theory necessary to understand present and future data. It includes state-of-the-art theoretical models that describe dense and hot matter and dynamical stellar simulations that make use of them, with the ultimate goal of determining which degrees of freedom are relevant under these conditions and how they affect the matter equation of state and stellar evolution.
Research & information: general --- Physics --- neutron stars --- equations of state --- relativistic models --- gravitational waves --- neutron star --- equation of state --- universal relation --- hybrid star --- color superconductivity --- diquark --- dense matter --- neutrinos --- hyperons --- nuclear matter --- neutron star merger --- beta equilibration --- weak interaction --- n/a --- chiral symmetry --- axion QED --- quark–hole pairing --- cold-dense QCD --- magnetic DCDW --- quark stars --- dark matter --- radial oscillations --- nuclear matter aspects --- quark deconfinement --- quark-gluon plasma production --- phase-transition --- neutron star crust --- meson interactions --- quantum molecular dynamics --- quark-hole pairing
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