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1987-01-01 | In the spirit of the Colloquium, the connections between Spin-glasses, Optimization problems and Neural Networks are outlined. Special emphasis is given on recent work on phase transition in spin-glasses. A complete cooling recipe for “spin-glass-like” optimization problems is given. The application of numerical spin-g... | Spin-glasses, optimization and neural networks | null |
1987-01-01 | We discuss the dependence of the ground state energy as the Monte Carlo (MC) cooling rate in a variety of spin glass and other optimization problems. Our work is motivated by recent interest in the concept of simulated annealing and the need to find efficient numerical optimization schemes. We find that the ground stat... | Monte Carlo and mean field slow cooling simulations for spin glasses: relation to NP-completeness | null |
1987-01-01 | Why should physicists be interested in biomolecules? One reason is that physics and in particular physical techniques have had, and still have, a great impact on biological sciences. A prime example is X-ray diffraction which in the hands of Max Perutz and John Kendrew led to the elucidation of the three-dimensional st... | The protein as a physics laboratory | null |
1987-01-01 | Simulated annealing is a combinatorial optimization method based on randomization techniques. The method originates from the analogy between the annealing of solids, as described by the theory of statistical physics, and the optimization of large combinatorial problems. Here we review the basic theory of simulated anne... | A pedestrian review of the theory and application of the simulated annealing algorithm | null |
1987-01-01 | The purpose of my contribution is twofold: In this part I wish to present a brief preview on the contents of this volume and how its individual contributions are connected with each other. Then in the main part I wish to present my own model on the synergetic computer which allows for pattern recognition and associativ... | Synergetic Computers for Pattern Recognition and Associative Memory | null |
1987-01-01 | The general properties of the distribution function and remarks on its weakness | null | |
1987-01-01 | Spin glasses and optimization | null | |
1987-01-01 | We have studied a simple quantum spin model, which shows chaotic behaviour in the classical limit. The essential feature of this model is the nonpredictability already on the classical level (i.e. the strong dependence on initial conditions). Our aim was to contribute to the understanding of how the corresponding quant... | The Kicked Quantum Spin: A Model System for Quantum Chaos | null |
1987-01-01 | In liquid alloys with strong AB bonding (decrease of electrical conductivity etc. at stoichiometric compositions; for a review see /1/) indications for long living associates have been derived from nuclear spin relaxation /2/. In such systems experimental results show high increase of quadrupolar rate R_Q in comparison... | Nuclear Quadrupolar Relaxation and Thermodynamics in Liquid Ternary Alloys | null |
1987-01-01 | The biophysical investigator interested in membrane fusion has distilled the complexities of the biological system to the simpler event of fusion between lipid vesicles (liposomes). This approach disregards the diversity and many of the accessory elements suspected to be involved in biological fusions (Poste and Nicols... | Lipid Vesicles | null |
1987-01-01 | Slow thermal relaxation in random systems and glasses has been an important field of study for many years. While such properties have received much attention in glasses,^1 spin-glasses^2 and random field magnets,^3 the behavior of pinned charge-density-wave (CDW) systems has received rather less study.^4 Since the comm... | Glassy Relaxation in Charge Density Wave Systems | null |
1987-01-01 | As pointed out in the introduction (chapter 1) there exists a clear analogy between the annealing of solids and the problem of solving large combinatorial optimization problems. The physical annealing process can be successfully modelled by using computer simulation methods from condensed matter physics [BAR76], [WOOD6... | The relation with statistical physics | null |
1987-01-01 | Compared to three-dimensional metals, quasi-one-dimensional conductors present two fundamental and apparently conflicting peculiarities: on the one hand, a one-dimensional electron gas is unstable against the formation of charge- or spin-density waves^1,2,3, in addition to the usual Cooper pairing instability^4 (which ... | The Crossover from One to Three Dimensions: Peierls and Spin-Peierls Instabilities | null |
1987-01-01 | An outline is given of recent attempts towards introducing meson-the-oretical nucleon-nucleon interactions into Faddeev calculations of the three-nucleon system. A method of separable expansion is explained that allows to reproduce the on-shell and off-shell behaviour of any given interaction, and its application is de... | Three-body problem with separable-expansion techniques and use of modern nucleon-nucleon forces | null |
1987-01-01 | A spin glass is a disordered magnet: in a typical example 50% of the bonds (randomly chosen) between two spins are ferromagnetic while the others are antiferromagnetic. From the experimental point of view^(1) spin glasses are characterized by the presence of a low temperature phase in which the relaxation time toward e... | Spin Glass Theory | null |
1987-01-01 | Our knowledge of the fundamental properties of surfaces and interfacial bonds has improved considerably over the last decade. While the fracture process is complex, it is dependent in part on these properties. Thus it is of interest to consider current theoretical understanding of metal surfaces and bimetallic interfac... | Universal Properties of Bonding at Metal Interfaces | null |
1987-01-01 | When it was discovered that string theories are inconsistent except when they are formulated in spacetimes of either 26 or 10 dimensions, a new reason for investigating dynamical geometry was born. Up to this point the general theory of relativity had stood in isolation. The gravitational force, based as it was in the ... | Vacuum Stability in Kaluza-Klein Theories | null |
1987-01-01 | After a sketch of history of gyroscope technology, the dynamic law of a gyroscope and its specialization to the suspended gyrocompass are outlined. The equations of motion of a north-seeking gyro are reviewed forming the base for observation techniques. Following a state-of-the-art report, the relations between the obs... | Gyroscope technology, status and trends | null |
1987-01-01 | The geological term “clay” refers to any naturally occuring material with a particle size less than 2μ. However, the term “clay mineral” refers to a specific composition of matter and a discrete structure, but with a particle size less than 2μ. Clay minerals are usually layered oxides. Included in this family are the l... | Swelling clays and related complex layered oxides | null |
1987-01-01 | The mean-field theory of dilute spin glasses and neural networks is studied in the limit where the average coordination number is finite (i.e., the average number of neighbors connected to each site). The zero-temperature phase diagram is calculated. Comparison between the properties of dilute neural networks and fully... | Mean-Field Theory of Spin Glasses and Neural Networks with Finite Coordination Number | null |
1987-01-01 | It is now a decade since the simultaneous-successive model of cognitive abilities, derived from the work of A.R. Luria, was publicised in Psychological Bulletin , (Das, Kirby & Jarman, 1975). More recently, the Kaufman Assessment Battery for Children (Kaufman & Kaufman, 1983), which is explicitly based on Luria’s theor... | A Focal Review of Research on the Luria-Das Model of Cognitive Processing | null |
1987-01-01 | The current status of spin glass theory is reviewed. Attention is given to the mean field theory and to numerical results on more realistic models. A brief comparison between theory and experiment is made. | Spin Glasses: Recent Theoretical Developments | null |
1987-01-01 | In Science and Hypothesis Poincaré (1906a, Pt 4, Ch. 11) remarks that if the angular velocities a and the initial longitudes b of the little planets were related by the formula ap + b = q ( p and q denoting two constants, p > 0), a ‘miracle’ would occur at time t = p : all the little planets would coalesce at the longi... | Retarded Causality as a Statistical Concept. Arrowless Microcausality | null |
1987-01-01 | We discuss the definition of the Sillium Model, which is an idealised model for the creation of model structures of tetrahedrally bonded solids, including amorphous phases. Data for a random network of 216 atoms, produced using the model, are presented. | The Sillium Model | null |
1987-01-01 | We review the physical conditions and the distribution of the three phases which consitute the atomic component: the cold clouds, the warm, neutral medium and the warm, ionized medium. Together, these three phases occupy about ≳ 40% of the interstellar volume and contain half the interstellar mass. The size of the H I ... | The Atomic Component | null |
1987-01-01 | Confronted with the contradiction between mounting evidence for a phase transition in three dimension with only two states (in zero field) and the necessity for a symmetry breaking à la PARISI when treating an Ising spin glass with a gaussion bond distribution, we look, as an escape, for possible stable replica symmetr... | On the replica symmetric Ising spin glasses | null |
1987-01-01 | A short review is given of the effects of pressure on proteins that are relevant for studies on monomeric heme proteins. The coupling of spin equilibria and ligand binding processes is discussed for metmyoglobin. The difference between horse and sperm whale metmyoglobin points to the steric control of the protein on th... | Pressure Effects on the Reactions of Heme Proteins | null |
1987-01-01 | The idea that the aqueous regions of cytoplasm consist of a concentrated and chaotic solution or proteins (and other macromolecules), coenzymes and metabolites of various kinds, and inorganic ions has been with us for a long time and still seems to be the commonly accepted paradigm. During the last 10 years, however, e... | Cytoplasmic Organisation and the Properties of Cell Water: Speculations on Animal Cell Cryopreservation | null |
1987-01-01 | Non-radiative photocarrier recombination in amorphous hydrogenated silicon (a-Si:H) is reviewed. Primary emphasis is given to undoped material in the room temperature regime and to the effects upon photocarrier processes of the D center observed in electron spin resonance. The measurements summarized include electron s... | Recombination and the Standard Model in Amorphous Hydrogenated Silicon (a-Si:H) : An Essay | null |
1987-01-01 | A major tool to characterize microemulsions and other supramolecular fluids is the application of scattering techniques. Static (angle-dependent) scattering provides a form factor and the static structure factor S(k), whereas dynamic experiments like photon correlation spectroscopy and neutron spin echo experiments lea... | Self-diffusion of Globules | null |
1987-01-01 | One of the simplest disturbances of an otherwise perfect crystal is an implanted positively charged elementary particle. There is interest in the microscopic properties of such defects from both basic and applied solid state physics. On the one hand, an investigator of the fundamental properties of solids with a clear ... | Muon and Pion Stopping Sites in Crystals from Decay-Particle Blocking | null |
1987-01-01 | The competition between the development of long range order and the freezing in of disorder at low temperatures may be particularly delicate in dipolar systems. The ordering of randomly placed electric dipoles in an incipient ferroelectric host can be affected by controlling concentration, temperature, electric field, ... | Time Dependent Nonlinear Response of a Dipolar Glass | null |
1987-01-01 | Two viewpoints concerning quantum and stochastic mechanics | null | |
1987-01-01 | It is not straightforward to determine the detailed electronic and magnetic properties of individual clusters. Optical spectroscopy has been applied successfully to conventional^1 and supersonic sources, but particularly for clusters larger than diatomics, the complexity of the spectra may make the analysis very diffic... | ESR of Small Clusters | null |
1986-12-01 | The classical and quantum mechanics of a system of directly interacting relativistic particles is discussed. We first discuss the spin-zero case, where we basically follow Rohrlich in introducing a set of covariant centre of mass (CM) and relative variables. The relation of these to the classic formulation of Bakamjian... | Relativistic dynamics for spin-zero and spin-half particles | null |
1986-12-01 | Two samples of DyAl_2 were studied by longitudial μSR in the paramagnetic and ferromagnetic regime. In a region T_c±40 K the samples give different signals although X-ray analysis can not detect any impurity phase in either of them. | Muon spin relaxation in different samples of DyAl_2 | null |
1986-12-01 | Positive muon spin rotation and relaxation measurements have been carried out on the antiferromagnets, pure MnF_2 and site-diluted (Mn_0.5Zn_0.5)F_2, above and below the Néel temperature T_N using single-crystal specimens. Two different muon signals have been found in the pure MnF_2; with the precession frequency υ_A f... | μ^+ SR studies on pure MnF_2 and site-diluted (Mn_0.5Zn_0.5)F_2SR studies on pure MnF_2 and site-diluted (Mn_0.5Zn_0.5)F_2 | null |
1986-12-01 | Zero-field longitudinal muon-spin-relaxation (μSR) experiments have been performed on single crystals of pseudo-brookite (Fe_2−_xTi_l+x ^O _5; x=0.25), an anisotropic spin-glass system. The spinglass temperature (Tg) is determined to be 44.0±0.5K. Above Tg, a distinct exponential muon-spin-relaxation rate (λ) is observ... | Observation of the anisotropic spin-glass transition and transverse spin ordering in pseudo-brookite through muon spin relaxation | null |
1986-12-01 | This review of the spin-glass problem will begin by considering the basic ingredients of a spin glass. Then I shall summarize the fundamental experimental properties and the real systems which are being studied. A bit of theory will be presented to show how idealized the models are when compared to the real materials. ... | Spin glasses: Some recent experiments | null |
1986-12-01 | The cubic Laves Phase UAl_2 is known to exhibit unusual magnetic and transport properties at low temperatures which have been explained by a narrow 5f-band in connection with strong spin fluctuations. Transverse and longitudinal μSR spectra taken between 300 K and 2 K show little variation in damping rate and muonic Kn... | μSR measurements on UAl_2 | null |
1986-12-01 | A new technique to study the spin dynamics of a static positive muon interacting with neighboring nuclear spins is presented. The method is based on the Trotter formula and on a random phase assumption about the initial state of the host spin system. Exact results for the case of muons localized at the octahedral inter... | A new technique to calculate the muon polarization function | null |
1986-12-01 | Time-resolved ESR of intersystem crossing and energy transfer processes | null | |
1986-12-01 | The electron spin resonance (ESR) spectra and the natural and gamma-induced thermoluminescence (TL) glow curves of a series of variably cation-exchanged Fe-Ca-clays prepared from SWy-1 montmorillonite were examined. The ESR signal (g = 2) intensity associated with the surface Fe was found to increase linearly with surf... | Effect of Adsorbed Iron on Thermoluminescence and Electron Spin Resonance Spectra of Ca-Fe-Exchanged Montmorillonite | null |
1986-12-01 | The spin polarization of positive muons thermalized in Xe has been measured as a function of pressure up to 4660 Torr (6.1 atm) by the muon spin rotation (MSR) technique. At 4660 Torr, triplet muonium (F=1, M=1) accounts for about 40% of the initial muon polarization and no significant signal from diamagnetic muons has... | Missing fractions in heavy gases: Xe and CCl_4? | null |
1986-12-01 | The population fitness in terms of the intrinsic rate of increase r _m was measured in eight pure (homogenic) strains of Ephestia kühniella Zeller with different larva color at an optimal temperature of 25°C, and in three strains at unfavorble temperatures of 15, 17, 28, and 30°C, to understand a mechanism of maintenan... | Studies on the color variation in larvae ofEphestia kühniella Zeller (Lepidoptera: Phycitidae) III. Fitness of different larval color strains | null |
1986-12-01 | Muon spin relaxation in low (weak) longitudinal magnetic field (LLF-μSR) provides a means of independently determining the static dipolar width Δ characterizing the μ^+ lattice site and the correlation time τ_c for μ^+ hopping, in a manner that is nearly model-independent for τ_c and especially accurate in the near-sta... | Determination of very slow μ^+ hop rates in Cu by LLF-μSRhop rates in Cu by LLF-μSR | null |
1986-12-01 | Leaf demography and productivity of Aucuba japonica , an understory shrub in the warm-temperate region, were examined and dry matter economy was analyzed to evaluate the roles of the evergreen foliage. Turnover of leaves occurred during a short period in spring. The mean leaf life span was about 2.6 years. Annual NAR (... | Matter-economical roles of the evergreen foliage ofAucuba japonica, an understory shrub in the warm-temperate region of Japan | null |
1986-10-01 | An account is made of the relativistic effects of the spin connection angle during direct restoration of the amplitude for a reaction involving the birth of pions in nucleon-nucleon collisions. This effect must be considered when conducting investigations at relativistic energies. | Accounting for the relativistic spin correction angle of the deuteron during direct restoration of the amplitude for the reaction N+N→+π+d | null |
1986-10-01 | We consider a general kinetic model for a chain of three-state Potts spins. From the time-evolution operator we infer points in two-dimensional Potts systems where certain spin correlations have one-dimensional character and the model is exactly solvable. This occurs in square lattice models with different kinds of com... | The kinetic Potts chain and related potts models with competing interactions | null |
1986-10-01 | Free motion of a system of rigid bodies with dual spin, provided with nutation dampers | null | |
1986-10-01 | An expansion for generating functionals (partition sums) of models expressed as lattice functional integrals with local (on-site) interactions is presented. This expansion renormalizes the standard perturbative expansion in such a way that certain its terms are summed up non-perturbatively. A non-self-consistent and a ... | Renormalized expansions for functional integrals: Generalized coherent potential approach to lattice models | null |
1986-09-01 | The dynamics of the anisotropic spin-1/2 nearest-neighbour Heisenberg chain is studied at infinite temperature. Low-order coefficients of the short-time expansions are computed for spin-spin and energy-density-energy-density correlation functions for cyclical as well as for open-ended chains. The commutator algebra nec... | High-temperature dynamics of the anisotropic Heisenberg chain studied by moment methods | null |
1986-09-01 | Ideal incompressible flow over a thin wing of finite span with large-amplitude oscillations | null | |
1986-07-01 | We consider certain small stochastic perturbations of a d -dimensional infinite system of coupled anharmonic oscillators. The evolution law is reversible in the Yaglom sense, thus Gibbs states with the given interaction and temperature are stationary measures. If d<3 then some stability properties of the interaction im... | On the stationary measures of anharmonic systems in the presence of a small thermal noise | null |
1986-06-01 | Static zero field Gaussian Kubo — Toyabe relaxation functions for muons in isotropic muonium atoms are presented. That is, as with diamagnetic muons, an average of the spin dynamics of a muon in an isolated isotropic ground state muonium atom is taken over an isotropic Gaussian continuous classical local random magneti... | Zero field isotropic Muonium Kubo — Toyabe relaxation functions | null |
1986-06-01 | Epr studies of radicals in conducting solutions, oligomer crystals and conducting polymers | null | |
1986-06-01 | A short review is given concerning the quantum statistical Monte Carlo method based on the equivalence theorem^(1) that d -dimensional quantum systems are mapped onto ( d +1)-dimensional classical systems. The convergence property of this approximate tansformation is discussed in detail. Some applications of this genea... | Quantum statistical monte carlo methods and applications to spin systems | null |
1986-06-01 | The present status of lattice measurements with fermions is discussed. Methods are presented which improve the extraction of particle masses using staggered fermions. It is suggested that fermion physics on blocked lattices might show improvement as compared to that on lattices generated with the Wilson action. This id... | Lattice QCD: Going beyond the mass spectrum | null |
1986-05-01 | A new learning mechanism is proposed for networks of formal neurons analogous to Ising spin systems; it brings such models substantially closer to biological data in three respects: first, the learning procedure is applied initially to a network with random connections (which may be similar to a spin-glass system), ins... | A biologically constrained learning mechanism in networks of formal neurons | null |
1986-04-01 | The Wigner distribution has proven to be a useful tool in many quantum problems requiring a joint distribution of position and momentum. In the present paper we develop a joint distribution for spin components within the spirit of the Wigner distribution. This distribution provides an insight into the quantum theory of... | Joint Wigner distribution for spin-1/2 particles | null |
1986-03-01 | Thermo field dynamics of quantum spin systems is formulated, which gives a new variational principle at finite temperatures. The KMS relation is reformulated as identities among thermal vacuum states. Path integral formulations of the thermal vacuum state are given, which yield a new “thermo field Monte Carlo method.” ... | Thermo field dynamics of quantum spin systems | null |
1986-03-01 | We formulate and study a spin glass model on the Bethe lattice. Appropriate boundary fields replace the traditional self-consistent methods; they give our model well-defined thermodynamic properties. We establish that there is a spin glass transition temperature above which the single-site magnetizations vanish, and be... | A mean field spin glass with short-range interactions | null |
1986-03-01 | For muons which have thermalized in the allowed stopping sites of a given crystal, zero-field static Kubo-Toyabe spin dynamics is expressed in terms of the crystal frame spherical harmonic coefficients of the local classical random magnetic field distributions associated with each stopping site. The resulting muon spin... | On zero-field anisotropic static Kubo-Toyabe relaxation functions | null |
1986-03-01 | Populations of the prosobranch snail Viviparus ater (Christ. and Jan) in Lake Zürich and Lake Maggiore (Switzerland) were compared in order to evaluate how soft water in Lake Maggiore affects shell morphology and population dynamics. A low calcium concentration of the water (3.5 mg CaCO_3l^−1) was the main reason for s... | Shell dissolution and mortality in the freshwater snailViviparus ater
| null |
1986-01-01 | The interactions between nucleotides and metal ions are of primary biological significance, the divalent metal ions playing a fundamental role in several biological reactions (1–5). Metal ions are in fact strongly involved in the action of nucleic acids and derivatives (1,2,4). Investigations of metal-nucleobase and -n... | Metal-Nucleobases Complexation Equilibria in Solution: An ESR Analysis | null |
1986-01-01 | Past work on computer-oriented formalisms for rigid/gyrostatic bodies is surveyed, together with their numerical computer program implementations. | A Perspective on Computer-Oriented Mutlibody Dynamical Formalisms and their Implementations | null |
1986-01-01 | Damped nuclear reactions are studied in order to improve our understanding of macroscopic nuclear dynamics at moderate excitation. Towards this end, it is important to study angular-momentum related observables, as they carry considerable information about the reaction dynamics: While the correlated mass and charge dis... | Angular Momentum Dynamics in Damped Nuclear Reactions | null |
1986-01-01 | Fast multi-level techniques are developed for large-scale problems whose variables may assume only discrete values (such as spins with only “up” and “down” states), and/or where the relations between variables is probabilistic. Motivation and examples are taken from statistical mechanics and field theory. Detailed proc... | Multi-level approaches to discrete-state and stochastic problems | null |
1986-01-01 | Models are intermediate way stations on the road to a complete theory of protein motions and protein dynamics. All roads lead to Rome and many models may contain some of the right ingredients for a successful theory. We can learn from nuclear theory, where apparently contradictory approaches, the liquid drop and the nu... | Proteins and Glasses | null |
1986-01-01 | Automata networks have been introduced as a modeling tool in several fields: neurophysiology, Fogelman(1985), Hopfield(1982), Mc Culloch(1943), selfreproducing cellular arrays, Von Neumann(1966), group dynamics, Goles(1985a) and, more recently, simulations on spin glass structures and other physical systems, Demongeot,... | Positive Automata Networks | null |
1986-01-01 | A review of nuclear structure of high spin states is given in these lectures with emphasis on the latest development in γ-ray spectroscopy. It is one of the topics in nuclear structure physics which has attracted most attention recently. Therefore, several complete reviews as well as innumerous papers on selected topic... | Nuclear Structure at High Spin | null |
1986-01-01 | A convenient model to study some features of photoionization processes which are pertinent for solar energy storage and relevant to biological electron-transfer processes is the aqueous solution of micelles with hydrophobic solute incorporated into them. The photoionization event occurs in the hydrocarbon-like region o... | Life-Time Distributions of Photoproduced Cation-Radicals in Micelles | null |
1986-01-01 | In the view of the author the answer to the question posed in the title is yes. However, since this opinion is offered by one who is hardly unbiased, it is appropriate that some evidence for this viewpoint be offered. This is the purpose of the present article. Our proposal is to offer various fundamental aspects of qu... | Are Coherent States the Natural Language of Quantum Theory? | null |
1986-01-01 | The purpose of this chapter is twofold. First, we will attempt to summarize the existing knowledge on the wide variety of bacterial cytochrome P-450 hemeproteins that have been discovered. As such, this represents the first comprehensive review of the bacterial cytochromes P-450. It should become evident to the reader ... | Cytochrome P-450_cam and Other Bacterial P-450 Enzymes | null |
1986-01-01 | The main features of nuclear spin relaxation in paramagnetic systems in solution have been described in the late fifties and early sixties by Solomon, Bloembergen and Morgan (1–4). Briefly, two spins (I = nuclear spin, S = electron spin) in a paramagnetic complex are allowed to interact through hyperfine interaction (d... | Nuclear Spin Relaxation in Paramagnetic Nickel (II) Complexes | null |
1986-01-01 | Libya | null | |
1986-01-01 | High spiry states in nuclei have been investigated intensively during the last years. A number of interesting phenomena have been observed, others are predicted. The theoretical description of these phenomena requires in principle the solution of a quantum mechanical many body problem with a large, but finite number of... | Nuclei at High Angular Velocities | null |
1986-01-01 | A bridge is a very complex system. Its analysis is rather involved for the following reasons: (1) It is difficult to analyse the combined action of stringers and road slab in the presence of dynamic loading. (2) The vehicle, which is passing on the bridge inducing the dynamic loading, is also a very complex system with... | Automatic Active Control of Simple Span Bridges | null |
1986-01-01 | The role of dynamic lipid-protein interactions in regulating the functional activity of membrane proteins has been extensively examined using a wide variety of biophysical techniques (1). The lipids in direct contact with membrane proteins are usually exchangeable with bulk lipids, although the two different types of l... | Lipid-Protein Interactions and Acetylcholine Receptor Function in Reconstituted Membranes | null |
1986-01-01 | Electron spin echo modulation spectrometry has been used to probe the weak electron-nuclear hyperfine interactions of x-doxylstearic acid spin probes in frozen micellar systems prepared in D_2O or with specifically deuterated surfactant molecules. Spin probes with x = 5, 7, 10, 12, and 16 were used. The surfactant mole... | Electron Spin Echo Modulation Studies of Doxylstearic Acid Nitroxide Spin Probe Locations in Micelles | null |
1986-01-01 | Malaysia | null | |
1986-01-01 | Any multispin system can be reasonably approximated by a sum of pairwise spin-spin interactions. As a consequence spin-lattice relaxation of any spin i coupled to a group of spins j can be approximated by summing the relaxation effects of all the spin pairs, yielding (1): (1) $$d < {I_{zi}}>/dt = -{R_i}\left( { <{I_{zi... | Determination of Zero- and Double-Quantum Relaxation Transition Probabilities by Multiple-Selective Irradiation Methods | null |
1986-01-01 | In the previous article we developed a microscopic theory of the CDW transition and, in particular, succeeded in interpreting in an unified manner various properties of 1T-TiSe_2 related to the CDW transition, such as the lattice instability and the lattice dynamics in the normal phase, and the lattice distortion and t... | Microscopic Theory of Effects of Lattice Fluctuation on Structural Phase Transitions | null |
1986-01-01 | This chapter tries to summarize some of the general progress which has been made during the last decade in the understanding of the Monte Carlo method in statistical physics and in its efficient implementation; but it will also point out some problems which still remain to be solved. In fact, there has been an enormous... | Recent Trends in the Development and Application of the Monte Carlo Method | null |
1986-01-01 | A combined use of the 2D-exchange NMR experiment with cross polarization and magic angle spinning (CP-MAS) is described. This enables us to study very slow molecular motions (1 kHz – 0.1 Hz) via natural abundance ^13C NMR. Precise information about the molecular motion involved can be obtained from the characteristic t... | A Two-Dimensional NMR Study of Very Slow Molecular Motions in Polymers | null |
1986-01-01 | Aluminium toxicity is recognized as a serious global problem because vast areas of the world, especially in the subtropic and tropic zones, in western Europe and in the eastern United States, suffer from soil acidity which mobilizes soil aluminium^1. Because part of the toxic effects exerted by aluminium ions are known... | Aluminium-Induced Deformations and Malfunctions of Calmodulin | null |
1986-01-01 | In this talk the decay of the compound nucleus (CN) — from formation to ground state — will be described. The shape and nuclear structure evolution in this process will be traced, in which spin I and excitation energy E decrease. Three topics will be discussed: (a) shape relaxation following formation; (b) γ-decay towa... | Evolution of Nuclear Structure with Spin and Temperature | null |
1986-01-01 | The last fifteen years have seen intense activity in the search of a unifying law for all the fundamental fields of physics. These fields, are experimentally known to be of two types: fermionic (half integer spin) or bosonic (integer spin). | Supergravities and Kaluza-Klein Theories | null |
1986-01-01 | Twenty years ago Coleman and Noll [11.1] succeeded in clarifying and making rigorous a procedure by which the laws of thermodynamics could be used to deduce constitutive restrictions on a vast variety of materials. Almost from the very beginning, indeed in a paper by Coleman and Mizel [11.2] in the same year as [11.1],... | Interstitial Working and a Nonclassical Continuum Thermodynamics | null |
1986-01-01 | The number of classes included in a set of data and the distribution of these classes in a data structure constitute a great deal of information about the data structure. Having obtained clusters of sample points, one can derive statistical information on each cluster and interpret the qualitative features of the syste... | Cluster Analysis of Nuclear Pores in Mammalian Cells | null |
1986-01-01 | We consider the ground state of a few quantum mechanical degrees of freedom coupled to a Bose field. Examples are the spin-boson Hamiltonian, the polaron, an electron in an external potential coupled to the radiation field, and, the recently popular, quantum coherence with dissipation. Feynman's method to integrate ove... | Models of statistical mechanics in one dimension originating from quantum ground states | null |
1986-01-01 | The Dirac theory has a hidden geometric structure. This talk traces the conceptual steps taken to uncover that structure and points out significant implications for the interpretation of quantum mechanics. The unit imaginary in the Dirac equation is shown to represent the generator of rotations in a spacelike plane rel... | Clifford Algebra and the Interpretation of Quantum Mechanics | null |
1986-01-01 | In a large range of nuclei low lying J^π=1^+ states have been found that are excited predominantly by a new M1 mode. Four properties of the new mode will be discussed in detail. Firstly, from the excitation energy systematics observed the strength of the Majorana force of the interacting boson model (IBA) is deduced. S... | Properties of a New Magnetic Dipole Mode Discovered in Low Energy Electron Scattering | null |
1986-01-01 | The ubiquitous character of polysaccharides in nature provides the historical basis for the study and utilization of these renewable materials_1–3. Considerable research has been focused on the chemical structure, molecular conformation, crystalline morphology, and physical properties of commercially important polysacc... | Polysaccharides from Lichens: 13C-NMR Studies on (1–6) - Beta-D-Glucan (Pustulan) | null |
1986-01-01 | The wombat with the broad hairy nose. Identification number ICME 5 1234123413. The peculiar animal peculiar to South Australia. What has Vombatus Platyrhinus got to do with my talk? That is a question for you to try to answer. | Discrete Mathematics | null |
1986-01-01 | The model on which collective computation in neural networks was originally shown to produce a content addressable memory was based on neurons with two discrete states (1) (or levels of activity) which might be thought of as “0” and “1”. That model involved an asynchronous updating of the state of each neuron, and coul... | Collective Computation With Continuous Variables | null |
1986-01-01 | We point out that the equivalent-photon approximation ( EPA ) for processes with massive spin-1 particles in the final state would have validity in a more restricted kinematic domain than for processes where it is commonly applied, viz., those with spin-1/2 or spin-0 particles in the final state. We obtain the criterio... | Validity of the equivalent-photon approximation for the production of massive spin-1 particles | null |
1986-01-01 | Mössbauer data for the Vanadium oxide bronzes, 0-Fe_0.35V_2O_5 and 0-A1_0.26Fe_0.09V_2O_5 reveal a randomly oriented spin arrangement with only weak indirect exchange interaction possibly stimulating a spin-glass like order. Below 18K the onset of magnetic order shows up as a broadened magnetic hyperfine patterns. Two ... | Mössbauer Effect Study of the Cluster Distribution in the Spin Glass θ-Me_0.35V_2O_5 (Me=Fe, A1) | null |
1986-01-01 | A force model with Δ-isobar and pion degrees of freedom is presented. It is noncovariant. It accounts for elastic two-nucleon scattering and for its unitarily coupled inelastic channels up to 500 MeV in the c.m. system with satisfactory accuracy. The force model forms a microscopic basis for a unifying description of n... | Nucleon-Nucleon Interaction above Pion Threshold | null |
1986-01-01 | Micellar solutions of pure ( sodium dodecylsulfate (SDS) and dodecyltrimethylammonium bromide (DTAB)) and mixed surfactants, in various molar ratios, were studied by ESR of nitroxide spin probes* Two spin probes were used: i) a positively charged spin probe ( 4-trimethylammonium-2,2,6,6-tetramethyl-piperidine- -1-oxy i... | Mixed Micelles of Dodecyltrimethylammonium Bromide with Sodium Dodecylsulfate Studied by ESR of Nitroxide Probes | null |
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