Results for "Sh. Y. Ezz-Alarab"

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Trigonometric Rosen-Morse Potential as the Quark-Antiquark Interaction Potential for Meson Properties in the Non-Relativistic Quark Model Using EAIMMay 14 2019Trigonometric Rosen-Morse potential is suggested as the quark-antiquark interaction potential for studying the thermodynamic properties and the masses of heavy and heavy-light mesons. For this purpose, N-radial Schrodinger equation is analytically solved ... More
Masses and Thermodynamics Properties of Heavy Mesons in the Non-Relativistic Quark Model Using Nikiforov-Uvarov MethodJan 02 2019Thermodynamics properties of heavy mesons are calculated within the framework of the N-dimensional radial Schrodinger equation. The Cornell potential is extended by including the quadratic potential plus the inverse of quadratic potential. The energy ... More
On nonlinear boundary value problem corresponding to $N$-dimensional inverse spectral problemMar 05 2018We establish a relationship between an inverse optimization spectral problem for N-dimensional Schr\"odinger equation $ -\Delta \psi+q\psi=\lambda \psi $ and a solution of the nonlinear boundary value problem $-\Delta u+q_0 u=\lambda u- u^{\gamma-1},~~u>0,~~ ... More
Cylindrically confined assembly of diblock copolymer under oscillatory shear flowSep 15 2016Manipulating the self-assembly nanostructures with combined different control measures is emerging as a promising route for numerous applications to generate templates and scaffolds for nanostructured materials. Here, the two different control measures ... More
Combinatorial framework for planning in geological explorationJan 22 2018The paper describes combinatorial framework for planning of geological exploration for oil-gas fields. The suggested scheme of the geological exploration involves the following stages: (1) building of special 4-layer tree-like model (layer of geological ... More
On Ergodic HypothesisFeb 28 2011In this paper The Ergodic Hypothesis is proven for one class of functions defined in the infinite dimensional unite cube where is given an action of some semigroup of mappings without the condition on metric transitivity. The result has not a finite analog. ... More
Towards Decision Support Technology Platform for Modular SystemsAug 23 2014The survey methodological paper addresses a glance to a general decision support platform technology for modular systems (modular/composite alterantives/solutions) in various applied domains. The decision support platform consists of seven basic combinatorial ... More
Improvement/Extension of Modular Systems as Combinatorial Reengineering (Survey)Apr 17 2013The paper describes development (improvement/extension) approaches for composite (modular) systems (as combinatorial reengineering). The following system improvement/extension actions are considered: (a) improvement of systems component(s) (e.g., improvement ... More
Composition of Modular Telemetry System with Interval Multiset EstimatesJul 25 2012The paper describes combinatorial synthesis approach with interval multset estimates of system elements for modeling, analysis, design, and improvement of a modular telemetry system. Morphological (modular) system design and improvement are considered ... More
On balanced clustering with tree-like structures over clustersDec 09 2018The article addresses balanced clustering problems with an additional requirement as a tree-like structure over the obtained balanced clusters. This kind of clustering problems can be useful in some applications (e.g., network design, management and routing). ... More
Theorem of coincidence of classes for a generalised shift operatorNov 07 2015In this paper, for a generalised shift operator introduced earlier, we prove theorem of coincidence of classes of functions defined by the order of best approximation by algebraical polynomials and the generalised Lipschitz classes defined by the generalised ... More
Note on Evolution and Forecasting of Requirements: Communications ExampleMay 22 2017Combinatorial evolution and forecasting of system requirements is examined. The morphological model is used for a hierarchical requirements system (i.e., system parts, design alternatives for the system parts, ordinal estimates for the alternatives). ... More
Towards Detection of Bottlenecks in Modular SystemsJun 01 2013The paper describes some basic approaches to detection of bottlenecks in composite (modular) systems. The following basic system bottlenecks detection problems are examined: (1) traditional quality management approaches (Pareto chart based method, multicriteria ... More
Towards combinatorial modeling of wireless technology generationsAug 29 2017Sep 02 2017The paper addresses the following problems: (1) a brief survey on wireless mobile communication technologies including evolution, history evolution (e.g., chain of system generations 0G, 1G, 2G, 3G, 4G, 5G, 6G, 7G); (2) using a hierarchical structural ... More
Numerical simulation of the interactions of domain walls with breathers in two-dimensional O(3) nonlinear sigma modelAug 10 2016By methods of numerical simulation the interaction of 180-degree domain walls with oscillating solitons in (2+1)-dimensional O(3) nonlinear sigma model is investigated. A model of the collisions in which there is observed a reflection of solitons from ... More
Stationary and moving breathers in (2+1)-dimensional O(3) nonlinear $σ$-modelMay 03 2016The formation and evolution of stationary and moving breather solutions in (2+1)-dimensional O(3) nonlinear $\sigma$-model are investigated. The analytical form of oscillating solutions for (2+1)-dimensional sine-Gordon equation, which evolve to periodic ... More
Morphological methods for design of modular systems (a survey)Jan 09 2012The article addresses morphological approaches to design of modular systems. The following methods are briefly described: (i) basic version of morphological analysis (MA), (ii) modification of MA as method of closeness to ideal point(s), (iii reducing ... More
Casimir force in the Gödel space-time and its possible induced cosmological inhomogeneityAug 21 2019The Casimir force between two parallel plates in the G\"odel universe is computed for a scalar field at finite temperature. It is observed that when the plates separation is comparable with the scale given by the rotation of the space-time, the force ... More
Spectral characterization of third-order harmonic generation assisted by two-dimensional plasma grating in airApr 08 2013A dramatic spectral modulation of third-order harmonic (TH) emission generated in a near in- frared femtosecond (fs) pulse filamentation, assisted by a two-dimensional plasma grating formed by two pump femtosecond pulses, is experimentally demonstrated ... More
Design of modular wireless sensorMar 09 2012The paper addresses combinatorial approach to design of modular wireless sensor as composition of the sensor element from its component alternatives and aggregation of the obtained solutions into a resultant aggregated solution. A hierarchical model is ... More
Approximating classes of functions defined by operators of differentiation or operators of generalised translation by means of algebraic polynomialsJul 30 2012Aug 27 2012In this paper, approximation by means of algebraic polynomials of classes of functions defined by a generalised modulus of smoothness of operators of differentiation of these functions is considered. We give structural characteristics of classes of functions ... More
Poincaré inequality and exponential integrability of hitting times for linear diffusionsJul 04 2009Let $X$ be a regular linear continuous positively recurrent Markov process with state space $\R$, scale function $S$ and speed measure $m$. For $a\in \R$ denote B^+_a&=\sup_{x\geq a} \m(]x,+\infty[)(S(x)-S(a)) B^-_a&=\sup_{x\leq a} \m(]-\infty;x[)(S(a)-S(x)) ... More
Approximating classes of functions defined by a generalised modulus of smoothnessJan 25 2014In the present paper, we use a generalised shift operator in order to define a generalised modulus of smoothness. By its means, we define generalised Lipschitz classes of functions, and we give their constructive characteristics. Specifically, we prove ... More
Heavy quarkonium and dynamical gluon mass at non-zero temperature in instanton vacuum modelOct 11 2018In the framework of the Instanton Liquid Model we evaluate the heavy quark $\bar{Q}Q$ potential at nonzero temperature $T$. The potential has two components: contribution due to direct interaction with instantons, and the modification of the one-gluon ... More
Analytical Model of Time-Dependent Ionization in the Envelopes of Type II Supernovae at the Photospheric PhaseJun 26 2019We investigate a simplified kinetic system of the hydrogen atom (two levels plus continuum) under conditions of a type IIP supernova at the plateau phase that realistically describes the basic properties of the complete system. We have found the Lyapunov ... More
On a metric on the space of monetary risk measuresJun 26 2019We introduce a metric on the space of monetary risk measure, which generates the point-wise convergence topology and extends the metric on the initial compactum.
Effects of transition metal doping in MgB$_2$ superconductorApr 30 2001Effects of chemical substitution of the divalent transition metals has been systematically investigated in Mg$_{1-x}M_x$B$_2$ (x=0.03; M=Mn, Fe, Co, Ni and Zn). Substitution of magnetic ions, i.e., Mn$^{2+}$, Fe$^{2+}$, Co$^{2+}$ and Ni$^{2+}$, for the ... More
Correlation Functions of the Ising Model with Multisite Interaction on the Husimi LatticeJul 06 1998We consider a general spin-1/2 Ising model with multisite interaction on the Husimi lattice with the coordination number q and derive an analytical expression of correlation functions for stable fixed points of the corresponding recurrence relation. We ... More
Lipschitz type spaces and Landau-Bloch type theorems for harmonic functions and Poisson equationsJul 27 2014In this paper, we investigate some properties on harmonic functions and solutions to Poisson equations. First, we will discuss the Lipschitz type spaces on harmonic functions. Secondly, we establish the Schwarz-Pick lemma for harmonic functions in the ... More
Rigidity of some classes of Lie algebras in connection to Leibniz algebrasJul 30 2017In this paper we focus on algebraic aspects of contractions of Lie and Leibniz algebras. The rigidity of algebras plays an important role in the study of their varieties. The rigid algebras generate the irreducible components of this variety. We deal ... More
Finite-size corrections for logarithmic representations in critical dense polymersJul 11 2011Apr 16 2012We study (analytic) finite-size corrections in the dense polymer model on the strip by perturbing the critical Hamiltonian with irrelevant operators belonging to the tower of the identity. We generalize the perturbation expansion to include Jordan cells, ... More
On Edgeworth Expansions in Generalized Urn ModelsJan 17 2014The random vector of frequencies in a generalized urn model is viewed as conditionally independent random variables, given their sum. Such a representation is exploited to derive Edgeworth expansions for a sum of functions of such frequencies. Applying ... More
Non-Local Finite-Size Effects in the Dimer ModelJan 04 2007We study the finite-size corrections of the dimer model on $\infty \times N$ square lattice with two different boundary conditions: free and periodic. We find that the finite-size corrections depend in a crucial way on the parity of $N$, and show that, ... More
Homogeneously derived transit timings for 17 exoplanets and reassessed TTV trends for WASP-12 and WASP-4Aug 13 2019We homogeneously analyse $\sim 3.2\times 10^5$ photometric measurements for $\sim 1100$ transit lightcurves belonging to $17$ exoplanet hosts. The photometric data cover $16$ years 2004--2019 and include amateur and professional observations. Old archival ... More
Logarithmic Conformal Field Theory and Boundary Effects in the Dimer ModelDec 29 2005Jan 02 2006We study the finite-size corrections of the dimer model on $\infty \times N$ square lattice with two different boundary conditions: free and periodic. We find that the finite-size corrections in a crucial way depend on the parity of $N$; we also show ... More
Observation of persistent orientation of chiral molecules by laser field with twisted polarizationJul 31 2019Molecular chirality is an omnipresent phenomenon of fundamental significance in physics, chemistry and biology. For this reason, search for novel techniques for enantioselective control, detection and separation of chiral molecules is of particular importance. ... More
Separating of critical points on the Nehari manifold via the nonlinear generalized Rayleigh quotientsJun 18 2019In this paper, we deal with equations of variational form which Nahari manifolds can contain more than two different types of critical points. We introduce a method of separating critical points on the Nahari manifold, based on the use of nonlinear generalized ... More
Some reverse $l_p$-type inequalities involving certain quasi monotone sequencesOct 31 2015In this paper, we give some $l_p$-type inequalities about sequences satisfying certain quasi monotone type properties. As special cases, reverse $l_p$-type inequalities for non-negative decreasing sequences are obtained. The inequalities are closely related ... More
On an inverse spectral problem and a generalized Sturm's nodal theorem for nonlinear boundary value problemsSep 01 2018We consider an inverse optimization spectral problem for the Sturm-Liouville operator $$\mathcal{L}[q] u:=-u''+q(x)u$$ subject to the separated boundary conditions. In the main result, we prove that this problem is related to the existence of solutions ... More
Threshold behavior of free electron lasers without inversionApr 22 2017The interaction between noncolinear laser and relativistic electron beams in static magnetic undulator has been studied within the framework of dispersion equations. For a free-electron laser without inversion (FELWI), the threshold parameters are found. ... More
Cooling in a Bistable Optical CavityDec 04 2006Apr 30 2007We propose a generic approach to nonresonant laser cooling of atoms/molecules in a bistable optical cavity. The method exemplifies a photonic version of Sisyphus cooling, in which the matter-dressed cavity extracts energy from the particles and discharges ... More
An Inhomogeneous Model Universe Behaving HomogeneouslyFeb 10 2007Jun 09 2008We present a new model universe based on the junction of FRW to flat Lemaitre-Tolman-Bondi (LTB) solutions of Einstein equations along our past light cone, bringing structures within the FRW models. The model is assumed globally to be homogeneous, i.e. ... More
The two-point resistance of a resistor network: A new formulation and application to the cobweb networkOct 04 2013Oct 21 2013We consider the problem of two-point resistance in a resistor network previously studied by one of us [F. Y. Wu, J. Phys. A {\bf 37}, 6653 (2004)]. By formulating the problem differently, we obtain a new expression for the two-point resistance between ... More
Decay Constants $f_{D_s^*}$ and $f_{D_s}$ from ${\bar{B}}^0\to D^+ l^- {\barν}$ and ${\bar{B}}^0\to D^+ D_s^{-(*)}$ DecaysOct 15 1998Oct 22 1998We calculate the decay constant of $D_s$ and $D_s^{*}$ with $\bar{B}^0 \ra D^{+}\ell^{-}\nu$ and $\bar{B}^0 \ra D^{+}D_s^{-(*)}$ decays. In our analysis we assume that factorization ansatz works and used two different form factor behaviours (constant ... More
Backwards on Minkowski's road. From 4D to 3D Maxwellian electromagnetismJul 16 2008Minkowski's concept of a four-dimensional physical space is a central paradigm of modern physics. The three-dimensional Maxwellian electrodynamics is uniquely generalized to the covariant four-dimensional form. Is the (1+3) decomposition of the covariant ... More
Local Procrustes for Manifold Embedding: A Measure of Embedding Quality and Embedding AlgorithmsJun 16 2008We present the Procrustes measure, a novel measure based on Procrustes rotation that enables quantitative comparison of the output of manifold-based embedding algorithms (such as LLE (Roweis and Saul, 2000) and Isomap (Tenenbaum et al, 2000)). The measure ... More
Plateaux Transitions in the Pairing Model:Topology and Selection RuleJul 01 1999Based on the two-dimensional lattice fermion model, we discuss transitions between different pairing states. Each phase is labeled by an integer which is a topological invariant and characterized by vortices of the Bloch wavefunction. The transitions ... More
Space-time Geometry in Exactly Solvable Quantum Dilaton GravityOct 23 1993Nov 04 1993We describe in detail how one can extract space-time geometry in an exactly solvable model of quantum dilaton gravity of the type proposed by Callan, Giddings, Harvey and Strominger ( CGHS ). Based on our previous work, in which a model with 24 massless ... More
Extraction of Black Hole Geometry in Exactly Quantized Two Dimensional Dilaton GravityOct 23 1993Based on our previous work, in which a model of two dimensional dilaton gravity of the type proposed by Callan, Giddings, Harvey and Strominger was rigorously quantized, we explicitly demonstrate how one can extract space-time geometry in exactly solvable ... More
Free-Energy Calculations in Protein Folding by Generalized-Ensemble AlgorithmsFeb 16 2001We review uses of the generalized-ensemble algorithms for free-energy calculations in protein folding. Two of the well-known methods are multicanonical algorithm and replica-exchange method; the latter is also referred to as parallel tempering. We present ... More
Exact Solution of a Monomer-Dimer Problem: A Single Boundary Monomer on a Non-Bipartite LatticeOct 01 2010Nov 09 2010We solve the monomer-dimer problem on a non-bipartite lattice, the simple quartic lattice with cylindrical boundary conditions, with a single monomer residing on the boundary. Due to the non-bipartite nature of the lattice, the well-known method of a ... More
Observation of Airy minimum in elastic and inelastic scattering of $^3$He from $^{12}$C at 50.5 and 60 MeV and alpha particle condensation in $^{12}$CJan 31 2013Angular distributions for elastic and inelastic scattering of $^3$He from $^{12}$C were measured at energies 50.5 and 60 MeV. The Airy minimum of the prerainbow scattering was clearly observed in the angular distributions for the 0$_2^+$ (7.65 MeV) state ... More
On the exact multiplicity of stable ground states of non-Lipschitz semilinear elliptic equations for some classes of starshaped setsAug 12 2018We prove the exact multiplicity of flat and compact support stable solutions of an autonomous non-Lipschitz semilinear elliptic equation of eigenvalue type according to the dimension N and the two exponents, $0<\alpha<\beta<1$, of the involved nonlinearites. ... More
The 6-vertex model of hydrogen-bonded crystals with bond defectsAug 26 1999Oct 01 1999It is shown that the percolation model of hydrogen-bonded crystals, which is a 6-vertex model with bond defects, is completely equivalent with an 8-vertex model in an external electric field. Using this equivalence we solve exactly a particular 6-vertex ... More
Achievement of Minimized Combinatorial Test Suite for Configuration-Aware Software Functional Testing Using the Cuckoo Search AlgorithmMar 25 2019Context: Software has become an innovative solution nowadays for many applications and methods in science and engineering. Ensuring the quality and correctness of software is challenging because each program has different configurations and input domains. ... More
Asymptotics of the eigenvalues and Abel basis property of the root functions of new type Sturm-Liouville problemsDec 18 2018This work investigates spectrum and root functions (that is, eigen- and associated functions) of a Sturm-Liouville problem involving an abstract linear operator (nonselfadjoint in general) in the equation together with supplementary transmission conditions ... More
Critical Behaviour near the Mott Metal-Insulator Transition in a Two-band Hubbard ModelJul 10 2001The Mott metal-insulator transition in the two-band Hubbard model in infinite dimensions is studied by using the linearized dynamical mean-field theory. The discontinuity in the chemical potential for the change from hole to electron doping is calculated ... More
Spherical Non-Abelian Solutions in Conformal GravityOct 06 2009Feb 14 2010We study static spherically-symmetric solutions of non-Abelian gauge theory coupled to Conformal Gravity. We find solutions for the self-gravitating pure Yang-Mills case as well as monopole-like solutions of the Higgs system. The former are localized ... More
Self-Gravitating Spherical Solutions of the non-minimally coupled non-Abelian Higgs ModelDec 01 2014Motivated by the Higgs Inflation scenario, we study static spherically-symmetric solutions of the non-Abelian Higgs model coupled non-minimally to Gravity. We find solutions for the self-gravitating sphaleron as well as monopole-like solutions and study ... More
Dynamically enhanced $B\to K^*π$ decays in perturbative QCDOct 08 2002Oct 22 2002We investigate the $B \to K^{*}\pi$ decays, one of hardly understandable processes among charmless B-meson decays, within the perturbative QCD method. Owing to the dynamically enhanced mechanism in PQCD, we obtain large branching ratios and large direct ... More
New Physics Search in B Meson DecaysMar 16 2000We discuss new physics search within the minimal supergravity model by using a possible large direct CP asymmetry in $B^{\pm} \to K^{\pm}\phi, K^{0}\pi^{\pm}$ decays and B meson rare decays.
Factorization in Color-Suppressed B Meson DecaysOct 22 1998We summerize the status of factorization hypothesis in the color-suppressed B meson decays : $B \to J/\psi K^{(*)}$. We present the general formalism for decay rates and polarization fractions with considering all possible non-factorizable contributions ... More
Top mass determination and O (alpha_S^5 m) correction to toponium 1S energy levelNov 19 2002Feb 16 2003Recently the full O(alpha_S^5 m, alpha_S^5 m log(alpha_S)) correction to the heavy quarkonium 1S energy level has been computed (except the a_3-term in the QCD potential). We point out that the full correction (including the log(alpha_S)-term) is approximated ... More
Duality in the Azbel-Hofstadter problem and the two-dimensional d-wave superconductivity with a magnetic fieldJul 05 2000A single-parameter family of lattice-fermion model is constructed. It is a deformation of the Azbel-Hofstadter problem by a parameter $h={$B%((BDelta}/t$ (quantum parameter). A topological number is attached to each energy band. A duality between the ... More
Intrinsic Structure and Kinematics of the Sub-Parsec Scale Jet of M87Sep 06 2007We report new results from a sub-parsec scale study of the inner jet in M87 performed at 15 GHz with the Very Long Baseline Array. We have detected a limb brightened structure of the jet along with a faint 3 mas long counter-feature which we also find ... More
Numerical study of disorder effects on the three-dimensional Hubbard modelMay 17 2000Combined effects of interactions and disorder are investigated using a finite temperature quantum Monte Carlo technique for the three-dimensional Hubbard model with random potentials of a finite range. Temperature dependence of the charge compressibility ... More
Antiferromagnetic, Charge and Orbital Ordered States of Na0.5CoO2 Based on the Two-Dimensional Triangular Lattice d-p ModelJun 05 2008We investigate the electronic state of a CoO_2 plane in the layered cobalt oxides Na_xCoO_2 using the 11 band d-p model on a two-dimensional triangular lattice, where the tight-binding parameters are determined so as to fit the LDA band structure. Effects ... More
Exact String-Like Solutions in Conformal GravityAug 06 2010Jun 10 2011The cylindrically-symmetric static vacuum equations of Conformal Gravity are solved for the case of additional boost symmetry along the axis. We present the complete family of solutions which describe the exterior gravitational field of line sources in ... More
Advances in domain independent linear text segmentationMar 30 2000This paper describes a method for linear text segmentation which is twice as accurate and over seven times as fast as the state-of-the-art (Reynar, 1998). Inter-sentence similarity is replaced by rank in the local context. Boundary locations are discovered ... More
Tracking Simulations Near Half-Integer Resonance at PEP-IIMay 20 2003Beam-beam simulations predict that PEP-II luminosity can be increased by operating the horizontal betatron tune near and above a half-integer resonance. However, effects of the resonance and its synchrotron sidebands significantly enhance betatron and ... More
Cylindrically-Symmetric Solutions in Conformal GravityDec 23 2009May 27 2010Cylindrically-symmetric solutions in Conformal Gravity are investigated and several new solutions are presented and discussed. Among them, a family of vacuum solutions, generalizations of the Melvin solution and cosmic strings of the Abelian Higgs model. ... More
Superconducting and Spinning Non-Abelian Flux TubesNov 07 2007Apr 11 2008We find new non-Abelian flux tube solutions in a model of $N_f$ scalar fields in the fundamental representation of SU(N)xU(1) with $N \leq N_f$ (the ``extended non-Abelian Higgs model''), and study their main properties. Among the solutions there are ... More
Full Formula for Heavy Quarkonium Energy Levels at Next-to-next-to-next-to-leading OrderAug 24 2014Aug 26 2016We derive a full formula for the energy level of a heavy quarkonium state identified by the quantum numbers $n$, $\ell$, $s$ and $j$, up to ${\cal O}(\alpha_s^5 m)$ and ${\cal O}(\alpha_s^5 m \log \alpha_s)$ in perturbative QCD. The QCD Bethe logarithm ... More
Corrections to quarkonium 1S energy level at O(alpha_S^4 m) from non-instantaneous Coulomb vacuum polarizationDec 26 2001Jan 28 2002We calculate O(alpha_S^4 m) and O(alpha_S^4 m log(alpha_S)) corrections to the quarkonium 1S energy level analytically, which have been overlooked in recent studies. These are the contributions from one Coulomb-gluon exchange with the 1-loop vacuum polarization ... More
Off-shell Suppression of Renormalons in Non-relativistic QCD BoundstatesOct 22 2001Apr 12 2002We study an effect of the off-shellness of the quark and antiquark inside a heavy quarkonium system on IR renormalons contained in the perturbative computations of the quarkonium energy levels. We demonstrate that, when the off-shellness p_Q^2 -m_Q^2 ... More
Identification of the Early Fermi LAT Gamma-Ray Bright Objects with Extragalactic VLBI sourcesAug 28 2009Nov 10 2009A list of 205 gamma-ray strong objects was reported recently as a result of a 3-month integration with the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope. We attempted identification of these objects, cross-correlating the gamma-ray ... More
Parsec-scale Jet in the Distant Gigahertz-Peaked Spectrum Quasar PKS 0858-279Jan 09 2009The high redshift GPS quasar PKS 0858-279 exhibits the following properties which make the source unusual. Our RATAN-600 monitoring of 1-22 GHz spectrum has detected broad-band radio variability with high amplitude and relatively short time scale. In ... More
Electronic State of Na_xCoO_2 Based on the Two Dimensional Triangular Lattice d-p ModelJun 05 2008The electronic state in a CoO_2 plane of the layered cobalt oxides Na_{x}CoO_2 is investigated by using the 11 band d-p model on a two-dimensional triangular lattice, where the tight-binding parameters are determined so as to fit the LDA band structure. ... More
Activators of Luminescence in Speleothems as Source of Major Mistakes in Interpretation of Luminescent Paleoclimatic RecordsSep 08 2009This work summarizes the main results of the operation of the International Program Luminescence of Cave Minerals of the commission on Physical Chemistry and Hydrogeology of Karst of UIS of UNESCO in the field of activators of speleothem luminescence. ... More
Mode conversion enhancement between silicon micro-slab and plasmonic nano-gap waveguidesDec 03 2012Apr 01 2013We investigate a short (~1.5{\mu}m) partially-corrugated tapered waveguide structure for mode coupling from a silicon micro-slab to a plasmonic nano-gap waveguide at the optical communication frequency. More than 80% transmission efficiency is reported ... More
Relic neutrino asymmetry generation from $ν_α- ν_s$ oscillationsDec 08 2000Active--sterile neutrino oscillations provide a mechanism by which large differences in the neutrino and antineutrino number densities can be created in the early universe. The quantum kinetic equations are employed in the study of these asymmetries, ... More
T-violation tests for relativity principlesJan 23 2003We consider the implications of a violation of the equivalence principle or of Lorentz invariance in the neutrino sector for the T-asymmetry $\Delta P_T \equiv P(\nu_{\alpha} \to \nu_{\beta}) - P(\nu_{\beta} \to \nu_{\alpha})$ in a three-flavour framework. ... More
Synchronised neutrino oscillations from self interaction and associated applicationsNov 05 2002Nov 11 2002A recent revival of interest in synchronised oscillations due to neutrino--neutrino forward scattering in dense gases has led to two interesting applications with notable outcomes: (i) cosmological bounds on neutrino--antineutrino asymmetries are improved ... More
Supercurrent Interactions in Noncommutative Yang-Mills and IIB Matrix ModelNov 07 2000Jan 16 2001It is known that noncommutative Yang-Mills is equivalent to IIB matrix model with a noncommutative background, which is interpreted as a twisted reduced model. In noncommutative Yang-Mills, long range interactions can be seen in nonplanar diagrams after ... More
An explanatory study of $^{11}$Li $β$ decay into $^9$Li and deuteronNov 24 1994The $\beta$-decay of $^{11}$Li into $^9$Li and {\it d} is studied using simple halo wave functions of $^{11}$Li. The sensitivity of the transition probability is elucidated on a description of the halo part and on a choice of the potential between $^9$Li ... More
Mott Transition in the Two-Dimensional Flux PhaseMay 16 2001Effects of the electron-electron interaction in the two-dimensional flux phase are investigated. We treat the half-filled Hubbard model with a magnetic flux $\pi$ per plaquette by the quantum Monte Carlo method. When the interaction is small, an antiferromagnetic ... More
Effects of ferromagnetic fluctuations on the electric and thermal transport properties in NaxCoO2Jun 03 2009We investigate the electronic states and the transport properties of the CoO2 plane in NaxCoO2 on the basis of the two-dimensional triangular lattice 11-band d-p model by using the fluctuation exchange approximation, where we consider the Coulomb interaction ... More
Nonconventional Polynomial CLTApr 02 2015Sep 07 2015We obtain a functional central limit theorem (CLT) for sums of the form $\xi_N(t)=\frac1{\sqrt N}\sum_{n=1}^{[Nt]}\big(F(X(q_1(n)),...,X(q_\ell(n)))-\bar F\big)$ where $q_1,...,q_\ell$ are polynomials.
Perfect Fluid Spherically-Symmetric Solutions in Massive GravityDec 08 2011Jun 20 2012We study spherically-symmetric solutions in Massive Gravity generated by matter sources with polytropic equation of state. We concentrate in the non-perturbative regime where the mass term non-linearities are important, and present the main features of ... More
Phenomenological Applications of $k_T$-Factorization (--Large Direct CP-Asymmetry in B-meson Decays--)Oct 29 2004We discuss applications of the perturbative QCD approach in the exclusive non-leptonic two body B-meson decays. We briefly review its ingredients and some important theoretical issues on the factorization approaches. PQCD results are compatible with present ... More
On the determination of the relative sign of $a_1$ and $a_2$ from polarization measurements in $B^- \rightarrow ρ^- {D^*}^o$ decaySep 26 1994Oct 05 1994We point out that polarization measurements such as the longitudinal fraction and the transverse left-right asymmetry in the Bauer-Stech-Wirbel (BSW) class III processes involving two final vector mesons, $B^- \ra \rho^- {D^*}^o$ taken as an example, ... More
Perturbative heavy quarkonium spectrum at next-to-next-to-next-to-leading orderSep 25 2013Jan 23 2014We compute the energy levels of some of the lower-lying heavy quarkonium states perturbatively up to O(alpha_s^5*m) and O(alpha_s^5*m*log[alpha_s]). Stability of the predictions depends crucially on the unknown 4-loop pole-MSbar mass relation. We discuss ... More
Perfect and partial hedging for swing game options in discrete timeJul 15 2009The paper introduces and studies hedging for game (Israeli) style extension of swing options considered as multiple exercise derivatives. Assuming that the underlying security can be traded without restrictions we derive a formula for valuation of multiple ... More
Correlation effects on the Fermi surface of the two-dimensional Hubbard modelJul 04 2002Effects of electron correlation on the Fermi surface is investigated for the two-dimensional Hubbard model by the quantum Monte Carlo method. At first, an infinitesimal doping from the half filling is focused on and the momentum dependent charge susceptibility ... More
Effects of Charge Ordering on Spin-Wave of Quarter-Filled Spin-Density-Wave StatesFeb 14 2002May 02 2002Spin-wave excitations of quarter-filled spin-density-wave state, which coexists with charge ordering, have been studied for one-dimensional extended Hubbard model with the nearest-neighbor repulsive interaction (V) and next-nearest-neighbor one (V_2). ... More
Proca Q Tubes and their Coupling to GravityNov 06 2016The Einstein-Proca system is studied in the case of a complex vector-field self-interacting through an appropriate potential with a global U(1) symmetry. The corresponding equations for a static, cylindrically symmetric metric and matter fields are then ... More
Penguin Contributions in the Lifetime Difference between $B_s$ and $B_d$, and a Possible New PhysicsOct 19 1998We consider penguin contributions to the lifetime splitting between the $B_s$ and the $B_d$ meson. In the Standard Model the penguin effects are found to be opposite in sign, but of similar magnitude as the contributions of the current-current operators, ... More
Molecular-Gas Superwind from the Face-on Wolf-Rayet Galaxy MRK 1259Mar 15 1998We report results of $^{12}$CO ($J=1$-0) mapping observations of the Wolf-Rayet starburst galaxy Mrk 1259 which has optical evidence for the superwind seen from a nearly pole-on view. The CO emission is detected in the central 4 kpc region. The nuclear ... More
Normal form and solitonsJun 13 2002We present a review of the normal form theory for weakly dispersive nonlinear wave equations where the leading order phenomena can be described by the KdV equation. This is an infinite dimensional extension of the well-known Poincar\'e-Dulac normal form ... More
Superconductivity and Density Wave in the Quasi-One-Dimensional Systems: Renormalization Group StudyOct 31 2004The anisotropic superconductivity and the density wave have been investigated by applying the Kadanoff-Wilson renormalization group technique to the quasi-one-dimensional system with finite-range interactions. It is found that a temperature (T) dependence ... More