Results for "M. L. Gozha"

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Young Open Star Clusters: The Spatial Distribution of Metallicity in the Solar NeighborhoodMay 15 2013We perform a comparative analysis of the spatial distribution of young (<50 Myr) open star clusters and field Cepheids with different metallicities. A significant fraction of young clusters are shown to have low metallicities atypical of field Cepheids. ... More
Two Populations of Open Star Clusters in the GalaxyDec 07 2012Based on our compiled catalogue of fundamental astrophysical parameters for 593 open clusters, we analyze the relations between the chemical composition, spatial positions, Galactic orbital elements, age, and other physical parameters of open star clusters. ... More
The Chemical Composition of Globular Clusters of Different Nature in our GalaxyApr 12 2019A catalog of Galactic globular clusters has been compiled and used to analyze relations between the chemical and kinematic parameters of the clusters. The catalog contains positions, distances, luminosities, metallicites, and horizontal-branch morphology ... More
Relationship between the Elemental Abundances and the Kinematics of Galactic-Field RR Lyrae StarsDec 20 2017Data of our compiled catalog containing the positions, velocities, and metallicities of 415 RR~Lyrae variable stars and the relative abundances [el/Fe] of 12~elements for 101 RR~Lyrae stars, including four $\alpha$~elements (Mg, Ca, Si, and Ti), are used ... More
Heterogeneity of the Population of Open Star Clusters in the GalaxyDec 07 2012Based on published data, we have compiled a catalogue of fundamental astrophysical parameters for 593 open clusters of the Galaxy. In particular, the catalogue provides the Galactic orbital elements for 500 clusters, the masses, central concentrations, ... More
Masses of RR Lyrae Stars with Different Chemical Abundances in the Galactic FieldMar 28 2019The surface gravities and effective temperatures have been added to a compilative catalog published earlier, which includes the relative abundances of several chemical elements for 100 field RR Lyrae stars. These atmoshperic parameters and evolutionary ... More
Peculiarities of the abundances of neutron-capture elements in Galactic open clustersFeb 16 2016The properties of the relative abundances of rapid and slow neutron-capture elements are studied using a catalog containing spectroscopic abundance determinations for 14~elements produced in various nuclear-synthesis processes for 90~open clusters. The ... More
Peculiarities of α-element abundances in Galactic open clustersFeb 16 2016A catalog compiling the parameters of 346 open clusters, including their metallicities, positions, ages, and velocities has been composed. The elements of the Galactic orbits for 272 of the clusters have been calculated. Spectroscopic determinations of ... More
Calibrating hydrogen-rich core-collapse supernovae for their use as distance indicators independently of type Ia supernovaeSep 08 2011Using our new general-relativistic, radiation hydrodynamics, Lagrangian code, we computed a rather extended grid of hydrogen-rich core-collapse supernova (CC-SN) models and explored the potentials of their "standardization" as distance indicators. We ... More
A relativistically covariant stochastic model for systems with a fluctuating number of particlesJun 29 1998We construct a relativistically covariant stochastic model for systems of non-interacting spinless particles whose number undergoes random fluctuations. The model is compared with the canonical quantization of the free scalar field in the limit of infinite ... More
Radiation hydrodynamics of core-collapse supernovae: the "key" asset for a self-consistent modelling of these eventsSep 08 2011We have developed a specifically tailored relativistic, radiation-hydrodynamics Lagrangian code, that enables us to simulate the evolution of the main observables (light curve, evolution of photospheric velocity and temperature) in core-collapse supernova ... More
Evolution of the main observables in core-collapse supernova events: a radiation-hydrodynamical modellingSep 08 2011With the aim of clarifying the nature of the supernova events from stars having initial (at the main sequence) masses larger than $\sim 8$-$10\,M_{\odot}$, we have developed a specifically tailored radiation hydrodynamics Lagrangian code, that enables ... More
Two mini-band model for self-sustained oscillations of the current through resonant tunneling semiconductor superlatticesJun 11 2010A two miniband model for electron transport in semiconductor superlattices that includes scattering and interminiband tunnelling is proposed. The model is formulated in terms of Wigner functions in a basis spanned by Pauli matrices, includes electron-electron ... More
Numerical method for hydrodynamic modulation equations describing Bloch oscillations in semiconductor superlatticesMay 07 2012We present a finite difference method to solve a new type of nonlocal hydrodynamic equations that arise in the theory of spatially inhomogeneous Bloch oscillations in semiconductor superlattices. The hydrodynamic equations describe the evolution of the ... More
The energy level structure of a variety of one-dimensional confining potentials and the effects of a local singular perturbationMay 17 2015Motivated by current interest in quantum confinement potentials, especially with respect to the Stark spectroscopy of new types of quantum wells, we examine several novel one-dimensional singular oscillators. A Green function method is applied, the construction ... More
On the completeness of the system of root vectors for first-order systemsSep 16 2011The paper is concerned with the completeness problem of root functions of general boundary value problems for first order systems of ordinary differential equations. Namely, we introduce and investigate the class of \emph{weakly regular boundary conditions}. ... More
Spatially confined Bloch oscillations in semiconductor superlatticesApr 03 2011Jul 15 2011In a semiconductor superlattice with long scattering times, damping of Bloch oscillations due to scattering is so small that convective nonlinearities may compensate it and Bloch oscillations persist even in the hydrodynamic regime. In this case, numerical ... More
Noise enhanced spontaneous chaos in semiconductor superlattices at room temperatureJul 25 2014Physical systems exhibiting fast spontaneous chaotic oscillations are used to generate high-quality true random sequences in random number generators. The concept of using fast practical entropy sources to produce true random sequences is crucial to make ... More
Theory of spatially inhomogneous Bloch oscillations in semiconductor superlatticesSep 30 2011In a semiconductor superlattice with long scattering times, damping of Bloch oscillations due to scattering is so small that nonlinearities may compensate it and Bloch oscillations persist even in the hydrodynamic regime. To demonstrate this, a Boltzmann-Poisson ... More
Rectification and nonlinear transport in chaotic dots and ringsJul 23 2007Nov 08 2007We investigate the nonlinear current-voltage characteristic of mesoscopic conductors and the current generated through rectification of an alternating external bias. To leading order in applied voltages both the nonlinear and the rectified current are ... More
Magnetic-field symmetries of mesoscopic nonlinear conductanceJan 01 2007We examine contributions to the dc-current of mesoscopic samples which are non-linear in applied voltage. In the presence of a magnetic field, the current can be decomposed into components which are odd (antisymmetric) and even (symmetric) under flux ... More
Charge fluctuations in open chaotic cavitiesAug 09 2005Oct 22 2005We present a discussion of the charge response and the charge fluctuations of mesoscopic chaotic cavities in terms of a generalized Wigner-Smith matrix. The Wigner-Smith matrix is well known in investigations of time-delay of quantum scattering. It is ... More
Cluster radioactivity of Th isotopes in the mean-field HFB theoryOct 24 2007Cluster radioactivity is described as a very mass asymmetric fission process. The reflection symmetry breaking octupole moment has been used in a mean field HFB theory as leading coordinate instead of the quadrupole moment usually used in standard fission ... More
Magnetic and axial vector form factors as probes of orbital angular momentum in the protonMar 16 1998We have recently examined the static properties of the baryon octet (magnetic moments and axial vector coupling constants) in a generalized quark model in which the angular momentum of a polarized nucleon is partly spin $\langle S_z \rangle$ and partly ... More
Cross Section to Multiplicity Ratios at Very High EnergyDec 09 2013Jul 10 2014Recent data from the LHC makes it possible to examine an old speculation that at very high energy the total multiplicity and the cross section in elementary particle interactions vary in parallel with energy. Using fits incorporating the new data, it ... More
The Ionization Structure of Sharpless 2-264: Multiwavelength Observations of the λ Ori H II RegionApr 13 2016We present velocity-resolved maps taken with the Wisconsin H-Alpha Mapper (WHAM) in H{\alpha}, [S II] {\lambda}6716, and [N II] {\lambda}6583 around the well-known O8 III star {\lambda} Ori A (HD 36861) (l = 185{\deg} to 205{\deg}, b = -24{\deg} to -1{\deg}). ... More
MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. IV. The Parent Luminosity Function of Radio-Loud BlazarsFeb 16 2007Nov 07 2007(Abridged) We use a complete sample of active galactic nuclei (AGN) selected on the basis of relativistically beamed 15 GHz radio flux density to derive the parent radio luminosity function (RLF) of bright radio-selected blazar cores. We use a maximum ... More
Microscopic description of cluster radioactivity in actinide nucleiJul 07 2011Cluster radioactivity is the emission of a fragment heavier than $\alpha$ particle and lighter than mass 50. The range of clusters observed in experiments goes from $^{14}$C to $^{32}$Si while the heavy mass residue is always a nucleus in the neighborhood ... More
Dynamics of four- versus two-terminal transport through chaotic quantum cavitiesJan 14 2010We consider multi-terminal mesoscopic transport through a well-conducting chaotic quantum cavity using random matrix theory. Four-probe resistance vanishes on the average and is not affected by weak localization. Its fluctuations are given by a single ... More
Causal Propagation of Spin-CascadesJun 30 2007We gauge the direct product of the Proca with the Dirac equation that describes the coupling to the electromagnetic field of the spin-cascade (1/2,3/2) residing in the four-vector spinor and analyze propagation of its wave fronts in terms of the Courant-Hilbert ... More
Radiation-hydrodynamical modelling of Core-Collapse Supernovae: light curves and the evolution of photospheric velocity and temperatureAug 02 2011We have developed a relativistic, radiation-hydrodynamics Lagrangian code, specifically tailored to simulate the evolution of the main observables (light curve, evolution of photospheric velocity and temperature) in core-collapse supernova (CC-SN) events. ... More
A new radiation-hydrodinamics code to study core-collapse supernova eventsSep 08 2011With the aim of clarifying the nature of the core-collapse supernova events, we have developed a specifically tailored relativistic, radiation-hydrodynamics Lagrangian code, that enables us to simulate the evolution of the main observables (light curve, ... More
Nonequilibrium free energy, H theorem and self-sustained oscillations for Boltzmann-BGK descriptions of semiconductor superlatticesNov 12 2010Dec 14 2010Semiconductor superlattices (SL) may be described by a Boltzmann-Poisson kinetic equation with a Bhatnagar-Gross-Krook (BGK) collision term which preserves charge, but not momentum or energy. Under appropriate boundary and voltage bias conditions, these ... More
Submillimeter and Millimeter MasersMay 30 2007Despite theoretical predictions of the existence of many submillimeter masers, and some pioneering observational discoveries over the past few decades, these lines have remained relatively unstudied due to (i) challenges associated with observing at shorter ... More
Bulk Universality and Related Properties of Hermitian Matrix ModelsMay 08 2007We give a new proof of universality properties in the bulk of spectrum of the hermitian matrix models, assuming that the potential that determines the model is globally $C^{2}$ and locally $C^{3}$ function (see Theorem \ref{t:U.t1}). The proof as our ... More
Molecular Systems with Infinite and Finite Degrees of Freedom. Part I: Multi-Scale AnalysisFeb 28 2008Feb 29 2008The paper analyses stochastic systems describing reacting molecular systems with a combination of two types of state spaces, a finite-dimensional, and an infinite dimenional part. As a typical situation consider the interaction of larger macro-molecules, ... More
Multiscale Analysis of Reaction NetworksFeb 29 2008In most natural sciences there is currently the insight that it is necessary to bridge gaps between different processes which can be observed on different scales. This is especially true in the field of chemical reactions where the abilities to form bonds ... More
Understanding the Forward Muon Deficit in Coherent Pion ProductionSep 27 2007For any inelastic process $v_{\ell} + I \to \ell^- + F$ with $m_{\ell} = 0$, the cross section at $\theta_{\ell} = 0$ is given by Adler's PCAC theorem. Inclusion of the lepton mass has a dynamical effect (``PCAC-screening'') caused by interference of ... More
Fermilab E791Oct 12 2000Fermilab E791, a very high statistics charm particle experiment, recently completed its data taking at Fermilab's Tagged Photon Laboratory. Over 20 billion events were recorded through a loose transverse energy trigger and written to 8mm tape in the the ... More
Hamiltonian Expression of Curvature Tensors in the York Canonical Basis: II) The Weyl Tensor, Weyl Scalars, the Weyl Eigenvalues and the Problem of the Observables of the Gravitational FieldJan 07 2014We find the Hamiltonian expression in the York basis of canonical ADM tetrad gravity of the 4-Weyl tensor of the asymptotically Minkowskian space-time. Like for the 4-Riemann tensor we find a radar tensor (whose components are 4-scalars due to the use ... More
Mathematical Equivalence vs. Physical Equivalence between Extended Theories of GravitationsFeb 12 2013We shall show that although Palatini f(R)-theories are equivalent to Brans-Dicke theories, still the first pass the Mercury precession of perihelia test, while the second do not. We argue that the two models are not physically equivalent due to a different ... More
Gauge Natural Formulation of Conformal Theory of GravityApr 03 2014Feb 08 2015We consider conformal gravity as a gauge natural theory. We study its conservation laws and superpotentials. We also consider the Mannheim and Kazanas spherically symmetric vacuum solution and discuss conserved quantities associated to conformal and diffeomorphism ... More
Phenomenological model of elastic distortions near the spin-Peierls transition in $CuGeO_3$Aug 17 1995A phenomenological model of the Landau type forms the basis for a study of elastic distortions near the spin-Peierls transition $T_c$ in $CuGeO_3$. The atomic displacements proposed by Hirota {\it et al.} [Phys. Rev. Lett. {\bf 73}, 736 (1994)] are accounted ... More
Turing patterns and solitary structures under global controlAug 20 1996Striped Turing patterns and solitary band and disk structures are constructed using a three-variable multiscale model with cubic nonlinearity and global control. The existence and stability conditions of regular structures are analysed using the equation ... More
Preheating of massive fermions after inflation: analytical resultsMar 06 2000Jun 09 2000Non-perturbative production of fermions after chaotic inflation has been the object of several studies in the very recent past. However, the results in the most interesting case of production of massive fermions in an expanding Universe were so far known ... More
Isotropic and Gauge Invariant Monopole Condensation in SU(2) QCDMar 21 2007Feb 28 2008I construct an isotropic, gauge invariant monopole condensate in SU(2) QCD. It provides a suitable, gauge-invariant vacuum for the dual-Meissner effect to provide QCD colour confinement without violating the isotropy of real space.
Three point SUSY Ward identities without GhostsAug 18 2004Sep 10 2004We utilise a non-local gauge transform which renders the entire action of SUSY QED invariant and respects the SUSY algebra modulo the gauge-fixing condition, to derive two- and three-point ghost-free SUSY Ward identities in SUSY QED. We use the cluster ... More
A Completely Invariant SUSY Transform of Supersymmetric QEDOct 10 2003We study the SUSY breaking of the covariant gauge-fixing term in SUSY QED and observe that this corresponds to a breaking of the Lorentz gauge condition by SUSY. Reasoning by analogy with SUSY's violation of the Wess-Zumino gauge, we argue that the SUSY ... More
Gluonic Colour Singlets in QCDAug 30 2009Jul 15 2010We argue that certain specific gluon excitations, other than conventional glueballs, can propagate freely outside of hadrons and glueballs. We begin with the result that the Abelian generators of $SU(N)$ QCD can be meaningfully isolated by the Cho-Faddeev-Niemi-Shabanov ... More
Stability of the Magnetic Monopole Condensate in three- and four-colour QCDMay 10 2006Jan 02 2007It is argued that the ground state of three- and four-colour QCD contains a monopole condensate, necessary for the dual Meissner effect to be the mechanism of confinement, and support its stability on the grounds that it gives the off-diagonal gluons ... More
Level statistics in the quantum Hall regimeAug 29 1996The statistical properties of energy eigenvalues in the critical regime of the lowest Landau band are investigated. The nearest neighbour level spacing distribution $P(s)$ and the Mehta quantity $I_0$, from which the scaling exponent $\nu$ of the correlation ... More
B -> chi_cJ K decays revisitedOct 20 2008We demonstrate that exclusive B decays to P-wave charmonium factorize in the non-relativistic limit provided that colour-octet contributions are taken into account, and estimate the branching fractions. Although there are very large uncertainties, we ... More
A Catalog of Point Sources Towards NGC 1333Apr 28 2015I present a catalog of point source objects towards NGC 1333, resolving a wide variety of confusion about source names (and occasionally positions) in the literature. I incorporate data from optical to radio wavelengths, but focus most of the effort on ... More
On relativistic jet/counterjet asymmetry in the presence of radiating jet boundary layerJul 08 2002We consider radiation of relativistic electrons accelerated within the jet extended boundary layer. Due to velocity shear across the boundary the observed jet/counterjet brightness ratio is diminished as compared to the one derived for the jet spine. ... More
A Model of Mesons based on $χ$SB in the Light-Front FrameOct 18 1994Spontaneous breaking of chiral symmetry is discussed in the light-cone framework. The essential ingredient is an infinite number of constituents near zero light-cone momentum. These high (light-cone) energy degrees of freedom freeze out and leave behind ... More
Feasibility Study of Lense-Thirring Precession in LS I +61303Mar 18 2010Very recent analysis of the radio spectral index and high energy observations have shown that the two-peak accretion/ejection microquasar model applies for LSI+61303. The fast variations of the position angle observed with MERLIN and confirmed by consecutive ... More
The Distribution of Warm Ionized Medium in GalaxiesAug 03 2010Ionized nebulae have been targets of interest since the introduction of the telescope centuries ago. These isolated, "classical" H II regions gave us some of the earliest insight into the copious feedback energy that stars inject into the interstellar ... More
A Note on DeMoivre's Quintic EquationJul 18 2009The quintic equation with real coefficients $$x^5+5ax^3+5a^2x+b=0$$ is solved in terms of radicals and the results used to sum a hypergeometric series for several arguments.
A non-linear equation from photopolymerization kineticsNov 30 2006In a medium where a photoreactive species produces N equally photoreactive radicals, by combining the Lambert-Beer law for the decay of light intensity, as a beam propagates into the medium, with the kinetic equation, one obtains a generalization of the ... More
Optimal Currents on Arbitrarily Shaped SurfacesFeb 17 2016Jun 26 2016An optimization problem has been formulated to find a resonant current extremizing various antenna parameters. The method is presented on, but not limited to, particular cases of gain $G$, quality factor $Q$, gain to quality factor ratio $G/Q$, and radiation ... More
Noise and diffusion of particles obeying asymmetric exclusion processesJul 04 2006The relation between noise and Fick's diffusion coefficient in barrier limited transport associated with hopping or tunneling mechanisms of particles obeying the asymmetric simple exclusion processes (ASEP) is physically assessed by Monte Carlo simulations. ... More
Chiral Quantization of the WZW $SU(n)$ ModelMay 14 1996Jan 15 1997We quantize the $SU(n)$ Wess-Zumino-Witten model in terms of left and right chiral variables choosing an appropriate gauge and we compare our results with the results that have been previously obtained in the algebraic treatment of the problem. The algebra ... More
Asteroids dimensions and the Truncated Pareto distributionOct 02 2012In this chapter first the statistics of the standard and truncated Pareto distributions are derived and used to fit empirical values of asteroids diameters from different families, namely, Koronis, Eos and Themis, and from the Astorb database. A theoretical ... More
Two lectures on heavy quark production in hadronic collisionsNov 14 1997These lectures present a pedagogical introduction to the physics of heavy-flavour production in hadronic collisions. The first lecture gives the theoretical background, with a discussion of leading-order calculations and of the effects of next-to-leading-order ... More
Toward an Infinite-component Field Theory with a Double Symmetry: Interaction of FieldsOct 13 2002We complete the first stage of constructing a theory of fields not investigated before; these fields transform according to Lorentz group representations decomposable into an infinite direct sum of finite-dimensional irreducible representations. We consider ... More
Effective inter-band coupling in MgB2 due to anharmonic phononsFeb 14 2003We investigate the origin of the inter-band coupling in MgB2 by focusing on its unusual phononic features, namely, the strong anharmonicity of the phonons and the presence of both linear and quadratic electron-phonon interactions of the Su-Schrieffer-Heeger ... More
Evolution of X-ray emission from young massive star clustersMay 25 2005The evolution of X-ray emission from young massive star clusters is modeled, taking into account the emission from the stars as well as from the cluster wind. It is shown that the level and character of the soft (0.2-10 keV) X-ray emission change drastically ... More
Gaussian quantum fluctuations in the superfluid-Mott phase transitionAug 28 2018Jan 23 2019Recent advances in cooling techniques make now possible the experimental study of quantum phase transitions, which are transitions near absolute zero temperature accessed by varying a control parameter. A paradigmatic example is the superfluid-Mott transition ... More
Auxetic two-dimensional lattice with Poisson's Ratio arbitrarily close to -1Jul 21 2014In this paper we propose a new lattice structure having macroscopic Poisson's ratio arbitrarily close to the stability limit -1. We tested experimentally the effective Poisson's ratio of the micro-structured medium; the uniaxial test has been performed ... More
Coulomb induced diffraction of energetic hadrons into jetsAug 27 2002The electromagnetic (e.m.) current conservation and renormalizability of QCD are used to calculate the amplitude of energetic hadron(photon) diffraction into several jets with large relative transverse momenta off the nucleon(nucleus) Coulomb field. Numerical ... More
Do we really need the weight force?Jun 10 2005Jun 27 2005In 1901 the third Conference Generale des Poids et Mesures (CGPM) defined the weight of a body as ``the product of its mass and the acceleration due to gravity". In practical terms the weight force corresponds to the gravitational force. However, this ... More
Advantages of adopting the operational definition of weightMay 27 2005Jun 07 2005With rare exceptions, in high school and college/university physics courses literature and in journals of physics, the weight is defined as a gravitational force or an exclusive consequence of it. These definitions lack logic from the perspective of present ... More
Perturbative polydispersity: Phase equilibria of near-monodisperse systemsJul 21 2000The conditions of multi-phase equilibrium are solved for generic polydisperse systems. The case of multiple polydispersity is treated, where several properties (e.g. size, charge, shape) simultaneously vary from one particle to another. By developing ... More
Phase Diagrams for Deformable Toroidal and Spherical Surfaces with Intrinsic Orientational OrderOct 03 1994A theoretical study of toroidal membranes with various degrees of intrinsic orientational order is presented at mean-field level. The study uses a simple Ginzburg-Landau style free energy functional, which gives rise to a rich variety of physics and reveals ... More
Remarks on the use of projected densities in the density dependent part of Skyrme or Gogny functionalsMar 15 2010I discuss the inadequacy of the "projected density" prescription to be used in density dependent forces/functionals when calculations beyond mean field are pursued. The case of calculations aimed at the symmetry restoration of mean fields obtained with ... More
Szegö-type Theorems for One-Dimensional Schrodinger Operator with Random Potential (smooth case)Sep 13 2018The paper is a continuation of work [15] in which the general setting for analogs of the Szeg\"o theorem for ergodic operators was given and several interesting cases were considered. Here we extend the results of [15] to a wider class of test functions ... More
Radio perspectives on the Monoceros SNR G205.5+0.5Jul 20 2012The Monoceros Loop (SNR G205.5+0.5) is a large shell-type supernova remnant located in the Rosette Complex region. It was suggested to be interacting with the Rosette Nebula. We aim to re-examine the radio spectral index and its spatial variation over ... More
Rigidity for periodic magnetic fieldsFeb 02 1999We study the motion of a charge on a conformally flat Riemannian torus in the presence of magnetic field. We prove that for any non-zero magnetic field there always exist orbits of this motion which have conjugate points. We conjecture that the restriction ... More
On cyclic branched coverings of prime knotsFeb 26 2007We prove that a prime knot K is not determined by its p-fold cyclic branched cover for at most two odd primes p. Moreover, we show that for a given odd prime p, the p-fold cyclic branched cover of a prime knot K is the p-fold cyclic branched cover of ... More
Double forms, curvature structures and the $(p,q)$-curvaturesApr 05 2004We introduce a natural extension of the metric tensor and the Hodge star operator to the algebra of double forms to study some aspects of the structure of this algebra. These properties are then used to study new Riemannian curvature invariants, called ... More
Manifolds with positive second H. Weyl curvature invariantMar 17 2004The second H. Weyl curvature invariant of a Riemannian manifold, denoted $h_4$, is the second curvature invariant which appears in the well known tube formula of H. Weyl. It coincides with the Gauss-Bonnet integrand in dimension 4. A crucial property ... More
Optimization problem for extremals of the trace inequality in domains with holesSep 01 2008We study the Sobolev trace constant for functions defined in a bounded domain $\O$ that vanish in the subset $A.$ We find a formula for the first variation of the Sobolev trace with respect to hole. As a consequence of this formula, we prove that when ... More
A Canonical Decomposition in Collective and Relative Variables of a Klein-Gordon Field in the Rest-Frame Wigner-Covariant Instant FormApr 29 1999Nov 11 1999The canonical decomposition of a real Klein-Gordon field in collective and relative variables proposed by Longhi and Materassi is reformulated on spacelike hypersurfaces. This allows to obtain the complete canonical reduction of the system on Wigner hyperplanes, ... More
Pointed Hopf algebras as cocycle deformationsOct 24 2010We show that all finite dimensional pointed Hopf algebras with the same diagram in the classification scheme of Andruskiewitsch and Schneider are cocycle deformations of each other. This is done by giving first a suitable characterization of such Hopf ... More
An isoperimetric inequality for the fundamental tone of free platesApr 19 2010May 05 2010We establish an isoperimetric inequality for the fundamental tone (first nonzero eigenvalue) of the free plate of a given area, proving the ball is maximal. Given $\tau>0$, the free plate eigenvalues $\omega$ and eigenfunctions $u$ are determined by the ... More
A Simple 'Range Extender' for Basis Set Extrapolation Methods for MP2 and Coupled Cluster Correlation EnergiesApr 24 2018We discuss the interrelations between various basis set extrapolation formulas and show that for the nZaPa and aug-cc-pVnZ basis set formulas, for n=4--6 their behavior closely resembles the Petersson (L+a)^{-3} formula with a shift a specific to the ... More
A fully {\it ab initio} potential curve of near-spectroscopic quality for the OH^- anion: importance of connected quadruple excitations and scalar relativistic effectsMar 16 2000A benchmark study has been carried out on the ground-state potential curve of the hydroxyl anion, OH^{-}, including detailed calibration of both the 1-particle and n-particle basis sets. The CCSD(T) basis set limit overestimates $\omega_e$ by about 10 ... More
Ab initio thermochemistry beyond chemical accuracy for first-and second-row compoundsAug 12 1998By judicious use of extrapolations to the 1-particle basis set limit and $n$-particle calibration techniques, total atomization energies of molecules with up to four heavy atoms can be obtained with calibration accuracy (1 kJ/mol or better, on average) ... More
Generalizations of Han's Hook Length IdentitiesMay 01 2008May 01 2008Han recently discovered new hook length identities for binary trees. In this paper, we extend Han's identities to binomial families of trees. Moreover, we present a bijective proof of one of the identities for the family of ordered trees.
Energy transport and heat production in quantum enginesMar 06 2009A quantum dot driven by two ac gate potentials oscillating with a phase lag may be regarded as a quantum engine, where energy is transported and dissipated in the form of heat. In this chapter we introduce a microscopic model for a quantum pump and analyze ... More
Aging of dynamically stabilized microtubulesDec 23 2009The microtubule network, an important part of the cytoskeleton, is constantly remodeled by alternating phases of growth and shrinkage of individual filaments. Plus-end tracking proteins (+TIPs) interact with the microtubule and in many cases alter its ... More
The MOJAVE Program: Studying the Relativistic Kinematics of AGN JetsSep 15 2003We discuss a new VLBA program to investigate structural and polarization changes in the brightest AGN jets in the northern sky. Our study represents a significant improvement over previous surveys in terms of image fidelity, size, and completeness, and ... More
Gigahertz-Peaked Spectrum Radio SourcesJan 16 2003The study of compact active galactic nuclei (AGN) that possess convex radio spectra (the gigahertz-peaked spectrum radio sources) offers a unique opportunity to probe both the early evolutionary stages of relativistic AGN jets and their immediate nuclear ... More
Report: GPU Based Massive Parallel Kawasaki Kinetics In Monte Carlo Modelling of Lipid MicrodomainsSep 17 2013This paper introduces novel method of simulation of lipid biomembranes based on Metropolis Hastings algorithm and Graphic Processing Unit computational power. Method gives up to 55 times computational boost in comparison to classical computations. Extensive ... More
Isotropy vs anisotropy in small-scale turbulenceOct 03 2000The decay of large-scale anisotropies in small-scale turbulent flow is investigated. By introducing two different kinds of estimators we discuss the relation between the presence of a hierarchy for the isotropic and the anisotropic scaling exponents and ... More
Radiation from the Relativistic Jet: a Role of the Shear Boundary LayerMar 04 2002Jun 24 2002Recent radio and optical large scale jets' observations suggest a two-component jet morphology, consisting of a fast central spine surrounded with a boundary layer with a velocity shear. We study radiation of electrons accelerated at such boundary layers ... More
The Galactic structure and chemical evolution traced by the population of planetary nebulaeMar 03 2010We use an extended and homogeneous data set of Galactic planetary nebulae (PNe) to study the metallicity gradients and the Galactic structure and evolution. The most up-to-date abundances, distances (calibrated with Magellanic Cloud PNe) have been employed, ... More
Metal-Ferroelectric-Metal heterostructures with Schottky contacts I. Influence of the ferroelectric propertiesAug 24 2005A model for Metal-Ferroelectric-Metal structures with Schottky contacts is proposed. The model adapts the general theories of metal-semiconductor rectifying contacts for the particular case of metal-ferroelectric contact by introducing: the ferroelectric ... More
Novel Collective Excitation in Spin Textured Edges of Quantum Hall SystemsFeb 27 1997We study the electric and magnetic properties of the edge of a two-dimensional electron gas in presence of a magnetic field and at filling factor unity. The existence of a spin textured edge is proved as a function of the Zeeman coupling and of the smoothness ... More
Curvature induced toroidal bound statesMar 13 2003Curvature induced bound state (E < 0) eigenvalues and eigenfunctions for a particle constrained to move on the surface of a torus are calculated. A limit on the number of bound states a torus with minor radius a and major radius R can support is obtained. ... More