Results for "Sita M. A. Bierma-Zeinstra"

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Multimodal Machine Learning-based Knee Osteoarthritis Progression Prediction from Plain Radiographs and Clinical DataApr 12 2019Knee osteoarthritis (OA) is the most common musculoskeletal disease without a cure, and current treatment options are limited to symptomatic relief. Prediction of OA progression is a very challenging and timely issue, and it could, if resolved, accelerate ... More
Multimodal Machine Learning-based Knee Osteoarthritis Progression Prediction from Plain Radiographs and Clinical DataApr 12 2019May 06 2019Knee osteoarthritis (OA) is the most common musculoskeletal disease without a cure, and current treatment options are limited to symptomatic relief. Prediction of OA progression is a very challenging and timely issue, and it could, if resolved, accelerate ... More
Discovering heavy U(1)-gauged Higgs bosons at the HL-LHCMar 06 2019We determine the discovery potential of the Large Hadron Collider (LHC) at 13 TeV center-of-mass energy for a heavy scalar resonance in the dilepton channel. In particular, we consider the singlet-like heavy mass eigenstate of a mixed two Higgs doublet ... More
Characterizations of Hardy-Orlicz spaces of quasiconformal mappingsOct 15 2014An H^p-theory of quasiconformal mappings on B^n has already been established. By replacing t^p with a general increasing growth function {\psi}(t) we define the Hardy-Orlicz spaces of quasiconformal mappings and prove various characterizations of these ... More
Hardy-Orlicz spaces of conformal densitiesOct 15 2014Feb 09 2015We define and prove characterizations of Hardy-Orlicz spaces of conformal densities.
Recommendations for the Technical Infrastructure for Standardized International Rights StatementsDec 01 2015Feb 29 2016This white paper is the product of a joint Digital Public Library of America (DPLA)-Europeana working group organized to develop minimum rights statement metadata standards for organizations that contribute to DPLA and Europeana. This white paper deals ... More
Rightsstatements.org White Paper: Requirements for the Technical Infrastructure for Standardized International Rights StatementsDec 01 2015Jan 17 2017This document is part of the deliverables created by the International Rights Statement Working Group, a joint working group of the Digital Public Library of America (DPLA) and Europeana. It provides the technical requirements for implementation of the ... More
IISCNLP at SemEval-2016 Task 2: Interpretable STS with ILP based Multiple Chunk AlignerMay 04 2016Interpretable semantic textual similarity (iSTS) task adds a crucial explanatory layer to pairwise sentence similarity. We address various components of this task: chunk level semantic alignment along with assignment of similarity type and score for aligned ... More
Plasma-grains interaction mediated by streaming non-Maxwellian ionsFeb 11 2019A comprehensive parametric study of plasma-grain interaction for non-Maxwellian streaming ions in steady-state employing particle-in-cell simulation is delineated. Instead of considering the inter-grain interaction potential to be the linear sum of isolated ... More
Intrinsic Hardy-Orlicz spaces of conformal mappingsSep 23 2014We define a new type of Hardy-Orlicz spaces of conformal mappings on the unit disk where in place of the value |f(x)| we consider the intrinsic path distance between f(x) and f(0) in the image domain. We show that if the Orlicz function is doubling then ... More
Mining Block I/O Traces for Cache Preloading with Sparse Temporal Non-parametric Mixture of Multivariate PoissonOct 13 2014Existing caching strategies, in the storage domain, though well suited to exploit short range spatio-temporal patterns, are unable to leverage long-range motifs for improving hitrates. Motivated by this, we investigate novel Bayesian non-parametric modeling(BNP) ... More
Rightsstatements.org White Paper: Requirements for the Technical Infrastructure for Standardized International Rights StatementsDec 01 2015Jul 27 2016This document is part of the deliverables created by the International Rights Statement Working Group, a joint working group of the Digital Public Library of America (DPLA) and Europeana. It provides the technical requirements for implementation of the ... More
Reverse Engineering Point Clouds to Fit Tensor Product B-Spline Surfaces by Blending Local FitsNov 21 2014Being able to reverse engineer from point cloud data to obtain 3D models is important in modeling. As our main contribution, we present a new method to obtain a tensor product B-spline representation from point cloud data by fitting surfaces to appropriately ... More
Fine-tuning in models with extended Higgs sectorsFeb 04 2019In the literature measures of fine-tuning have been discussed as one of the tools to assess the feasibility of beyond the Standard Model theories. In this paper we focus on two specific measures and investigate what kind of fine-tuning they actually quantify. ... More
Viscoelastic modes in a strongly coupled cold magnetized dusty plasmaOct 29 2013A generalized hydrodynamical model has been used to study low frequency modes in a strongly coupled, cold, magnetized dusty plasma. Such plasmas exhibit elastic properties due to strong correlations among dust particles and the tensile stresses imparted ... More
Nested Hierarchical Dirichlet Processes for Multi-Level Non-Parametric Admixture ModelingAug 26 2015Aug 27 2015Dirichlet Process(DP) is a Bayesian non-parametric prior for infinite mixture modeling, where the number of mixture components grows with the number of data items. The Hierarchical Dirichlet Process (HDP), is an extension of DP for grouped data, often ... More
Near-perfect conduction through a ferrocene-based molecular wireSep 16 2004Feb 15 2005Here we describe the design, single-molecule transport measurements, and theoretical modeling of a ferrocene-based organometallic molecular wire, whose bias-dependent conductance shows a clear Lorentzian form with magnitude exceeding 70% of the conductance ... More
Weighted Hardy Spaces of Quasiconformal MappingsApr 01 2019We establish a weighted version of the $H^p$-theory of quasiconformal mappings.
Music and Vocal Separation Using Multi-Band Modulation Based FeaturesJun 10 2014The potential use of non-linear speech features has not been investigated for music analysis although other commonly used speech features like Mel Frequency Ceptral Coefficients (MFCC) and pitch have been used extensively. In this paper, we assume an ... More
A Comparison of SC-FDE and UW DFT-s-OFDM for Millimeter Wave CommunicationsJan 28 2018In this study, we compare the single-carrier (SC) waveform adopted in IEEE 802.11ad and unique word discrete Fourier transform spread orthogonal frequency division multiplexing (UW DFT-s-OFDM) waveform. We provide equivalent representations of up-sampling ... More
Dynamic anisotropy in MHD turbulence induced by mean magnetic fieldJun 05 2017Jun 06 2017In this paper, we study the development of anisotropy in strong MHD turbulence in the presence of a large scale magnetic field B 0 by analyzing the results of direct numerical simulations. Our results show that the developed anisotropy among the different ... More
Andlantis: Large-scale Android Dynamic AnalysisOct 28 2014Analyzing Android applications for malicious behavior is an important area of research, and is made difficult, in part, by the increasingly large number of applications available for the platform. While techniques exist to perform static analysis on a ... More
Collision induced amplification of wakes in streaming plasmasFeb 23 2017This work examines the formation of wake fields caused by ions streaming around a charged dust particle, using three-dimensional particle-in-cell (PIC) simulations with charge-neutral collisions included. The influence of an external driving electric ... More
Letter: Mathematical Foundation of Turbulence Generation-Symmetric to Asymmetric Liutex/RortexMay 08 2019Vortex has been considered as the building block and muscle of turbulence for long time. A new physical quantity called Liutex (previously named Rortex) has been defined as the rigid rotation part of fluid motion. From DNS and experiment, forest of hairpin ... More
Complex Centers of Polynomial Differential EquationsMar 10 2007We present some results on the existence and nonexistence of centers for polynomial first order ordinary differential equations with complex coefficients. In particular, we show that binomial differential equations without linear terms do not complex ... More
Periodic Solutions of Abel Differential EquationsMay 05 2006Jun 09 2006For a class of polynomial non-autonomous differential equations of degree n, we use phase plane analysis to show that each equation in this class has n periodic solutions. The result implies that certain rigid two-dimensional systems have at most one ... More
Polynomial Differential Equations with Small coefficientsApr 17 2009Classes of polynomial differential equations of degree n are considered. An explicit upper bound on the size of the coefficients are given which implies that each equation in the class has exactly n complex periodic solutions. In most of the classes the ... More
The $θ$ vacuum reveals itself as the fundamental theory of the quantum Hall effect. I. Confronting controversiesJun 01 2002The $\theta$ dependence of the Grassmannian $U(m+n)/U(m)\times U(n)$ non-linear $\sigma$ model is reexamined. This general theory provides an important laboratory for studying the quantum Hall effect, in the special limit $m=n=0$ (replica limit). We discover ... More
Assessing inflow rates in atomic cooling halos: implications for direct collapse black holesApr 01 2015Jun 30 2015Supermassive black holes are not only common in the present-day galaxies, but billion solar masses black holes also powered $z\geq 6$ quasars. One efficient way to form such black holes is the collapse of a massive primordial gas cloud into a so-called ... More
Shear viscosity of the $Φ^4$ theory from classical simulationMay 05 2015Shear viscosity of the classical $\Phi^4$ theory is measured using classical microcanonical simulation. To calculate the Kubo formula, we measure the energy-momentum tensor correlation function, and apply the Green-Kubo relation. Being a classical theory, ... More
Influence of Thermal Fluctuations of Spin Density Wave Order Parameter on the Quasiparticle Spectral FunctionJan 04 2010The two-dimensional model of itinerant electrons coupled to an anti-ferromagnetic order parameter is considered. In the mean field solution the Fermi surface undergoes reconstruction, and breaks into disconnected ``pockets''. We have studied the effect ... More
Relativistic Outflows in Gamma-Ray BurstsJan 08 2007The possibility that gamma-ray bursts (GRBs) were not isotropic emissions was devised theoretically as a way to ameliorate the huge energetic budget implied by the standard fireball model for these powerful phenomena. However, the mechanism by which after ... More
Spin stiffness and quantum fluctuations in C-type and A-type antiferromagnetsNov 05 2002We present a systematic study of quantum fluctuations in the C-type and A-type antiferromagnetic (AF) phases in cubic lattices and in bilayer systems. Using the linear spin-wave theory, we show that the spin stiffness and the quantum corrections to the ... More
Quantum nonlinear phononics route towards nonequilibrium materials engineering: Melting dynamics of a ferrielectric charge density waveJun 21 2018Oct 10 2018Negative nonlinear electron-phonon coupling involving an infrared-active phonon mode can lead to an instability towards the formation of a polar lattice distortion with ferrielectric (FE) moments accompanied by an electronic charge-density wave (CDW). ... More
Weighted Configuration ModelJan 31 2005The configuration model is one of the most successful models for generating uncorrelated random networks. We analyze its behavior when the expected degree sequence follows a power law with exponent smaller than two. In this situation, the resulting network ... More
Design of parametrically forced patterns and quasipatternsMay 07 2008The Faraday wave experiment is a classic example of a system driven by parametric forcing, and it produces a wide range of complex patterns, including superlattice patterns and quasipatterns. Nonlinear three-wave interactions between driven and weakly ... More
The Universal Covering Group of U(n) and Projective RepresentationsNov 23 1999Using fibre bundle theory we construct the universal covering group of U(n), $\tilde{U}(n)$, and show that $\tilde{U}(n)$ is isomorphic to the semidirect product $SU(n)\bigcirc {\scriptstyle s}$ R. We give a bijection between the set of projective representations ... More
On the Topology of the Symmetry Group of the Standard ModelDec 01 1998We study the topological structure of the symmetry group of the standard model, $G_{SM}=U(1)\times SU(2)\times SU(3)$. Locally, $G_{SM}\cong S^1\times (S^3)^2\times S^5$. For SU(3), which is an $S^3$ bundle over $S^5$ (and therefore a local product of ... More
Alexander Polynomial Invariants of Torus Knots T(n,3) and Chebyshev PolynomialsJul 27 2011The explicit formula, which expresses the Alexander polynomials \Delta_{n,3}(t) of torus knots T(n,3) as a sum of the Alexander polynomials \Delta_{k,2}(t) of torus knots T(k,2), is found. Using this result and those from our previous papers, we express ... More
A Kaehler Structure of the Triplectic GeometryJul 02 1998Sep 23 1998We study the geometry of the triplectic quantization of gauge theories. We show that underlying the triplectic geometry is a Kaehler manifold N endowed with a pair of transversal polarizations. The antibrackets can be brought to the canonical form if ... More
Simulated spectral states of AGN and observational predictionsFeb 03 2011Active galactic nuclei (AGN) and galactic black hole binaries (GBHs) represent two classes of accreting black holes. They both contain an accretion disc emitting a thermal radiation, and a non-thermal X-ray emitting corona. GBHs exhibit state transitions, ... More
Unitary decoupling treatment of a quadratic bimodal CQED modelDec 11 2012Dec 18 2012We consider a two-photon quantum model of radiation-matter interaction between a single two-level atom and a degenerate bimodal high-Q cavity field. Within this tripartite system the explicit construction of two collective radiation modes, one of which ... More
High pressure Ca-VI phase between 158-180 GPa: Stability, electronic structure and superconductivitySep 03 2010Sep 14 2010We have performed ab initio calculations for new high-pressure phase of Ca-VI between 158-180 GPa. The study includes elastic parameters of mono- and poly-crystalline aggregates, electronic band structure, lattice dynamics and superconductivity. The calculations ... More
U(1)-invariant membranes: the geometric formulation, Abel and pendulum differential equationsMay 13 2009Aug 22 2010The geometric approach to study the dynamics of U(1)-invariant membranes is developed. The approach reveals an important role of the Abel nonlinear differential equation of the first type with variable coefficients depending on time and one of the membrane ... More
Iterating free-field AdS/CFT: higher spin partition function relationsFeb 02 2016May 06 2016We find a simple relation between a free higher spin field partition function on thermal quotient of AdS(d+1) and the partition function of the associated d-dimensional conformal higher spin field on thermal quotient of AdS(d). Starting with a conformal ... More
Conformal a-anomaly of some non-unitary 6d superconformal theoriesJun 29 2015Aug 16 2015We compute the conformal anomaly a-coefficient for some non-unitary (higher derivative or non-gauge-invariant) 6d conformal fields and their supermultiplets. We use the method based on a connection between 6d determinants on S^6 and 7d determinants on ... More
Spiky strings, light-like Wilson loops and pp-wave anomalyFeb 14 2008Jan 14 2010We consider rigid rotating closed strings with spikes in AdS5 dual to certain higher twist operators in N=4 SYM theory. In the limit of large spin when the spikes reach the boundary of AdS5, the solutions with different numbers of spikes are related by ... More
On reduced models for superstrings on AdS_n x S^nJun 16 2008Jul 16 2008We review the Pohlmeyer reduction procedure of the superstring sigma model on AdS_n x S^n leading to a gauged WZW model with an integrable potential coupled to 2d fermions. In particular, we consider the case of the Green-Schwarz superstring on AdS_3 ... More
Heavy-Light Meson Decay Constant from QCD Sum Rules in Three-Loop ApproximationAug 13 2001Nov 09 2001In this paper we compute the decay constant of the pseudo-scalar heavy-light mesons in the heavy quark effective theory framework of QCD sum rules. In our analysis we include the recently evaluated three-loop result of order $\alpha_s^2$ for the heavy-light ... More
Scanning tunneling microscopy of adsorbed molecules on metalic surfaces for nearly localized atomic statesMar 09 2011Jun 23 2011We consider a Hubbard-Anderson model which describes localized orbitals in five different sites hybridized both among themselves and with a continuum of extended states. A square planar geometry with an atom at the center is used to represent TBrPP-Co ... More
Coherent and Squeezed States in Shape Invariant Potentials Obtained from the Master FunctionMar 13 2000A general algorithm has been given for the generation of Coherent and Squeezed states, in one-dimensional hamiltonians with shape invariant potential, obtained from the master function. The minimum uncertainty states of these potentials are expressed ... More
Cryptanalysis of an Elliptic Curve-based Signcryption SchemeApr 20 2010Mar 19 2012The signcryption is a relatively new cryptographic technique that is supposed to fulfill the functionalities of encryption and digital signature in a single logical step. Although several signcryption schemes are proposed over the years, some of them ... More
Problems and cures (partial) for holographic cosmologyOct 03 2003We analyze the validity of the generalized covariant entropy bound near the apparent horizon of isotropic expanding cosmological models. We encounter violations of the bound for cosmic times smaller than a threshold. By introducing an infrared cutoff ... More
Close frequencies in pulsating stars: common and mysterious!Sep 22 2005Amplitude and phase variability are commonly found in many different types of pulsating stars. This suggests a common, presently unknown physical origin. We have examined the phenomenon in several Delta Scuti stars with extensive data and find the beating ... More
IFU spectroscopy of Southern Planetary Nebulae V: Low-ionization structuresJul 30 2017In this 5th paper of the series, we examine the spectroscopy and morphology of four southern Galactic planetary nebulae Hen 2-141, NGC5307, IC 2553, and PB6 using new integral field spectroscopy data. The morphologies and ionization structures of the ... More
Module weak Banach-Saks and module Schur properties of Hilbert C*-modulesFeb 24 2009Oct 25 2009Continuing the research on the Banach-Saks and Schur properties started in (cf. M. Frank, A. A. Pavlov, Banach-Saks properties of C*-algebras and Hilbert C*-modules (submitted)) we investigate analogous properties in the module context. As an environment ... More
IFU spectroscopy of Southern PNe: VII Photo-ionization modelling of intermediate excitation class objectsFeb 02 2019We present integral field unit spectroscopic observations of southern Galactic planetary nebulae (PNe), IC 2501, Hen 2-7, and PB4. The goal of studying these objects together is that, although they have roughly similar intermediate excitation and evolution ... More
Model comparison of the dark matter profiles of Fornax, Sculptor, Carina and SextansApr 10 2013We use orbit based dynamical models to fit the 2nd and 4th moments of the line of sight velocity distributions of the Fornax, Sculptor, Carina and Sextans dwarf spheroidal galaxies. Our goal is to compare dark matter profile models of these four systems ... More
Approximation complexity of homogeneous sums of random processesMay 31 2018We study approximation properties of additive random fields $Y_d$, $d\in\mathbb{N}$, which are sums of zero-mean random processes with the same continuous covariance functions. The average case approximation complexity $n^{Y_d}(\varepsilon)$ is defined ... More
The large N theory exactly reveals the quantum Hall effect and theta-renormalizationDec 30 2000We revisit the $\theta$ dependence in $CP^{N-1}$ model with large $N$. We study the consequences of a recently discovered new ingredient of the instanton vacuum, i.e. the massless chiral edge excitations. Contrary to the previous believes, our results ... More
Phase space flow in the Husimi representationJun 06 2013We derive a continuity equation for the Husimi function evolving under a general non-hermitian Hamiltonian and identify the phase space flow associated with it. For the case of unitary evolution we obtain explicit formulas for the quantum flow, which ... More
Static Axisymmetric Einstein Equations in Vacuum: Symmetry, New Solutions and Ricci SolitonsAug 21 2015An explicit one-parameter Lie point symmetry of the four-dimensional vacuum Einstein equations with two commuting hypersurface-orthogonal Killing vector fields is presented. The parameter takes values over all of the real line and the action of the group ... More
Finite quantum tomography via semidefinite programmingJul 26 2007Using the the convex semidefinite programming method and superoperator formalism we obtain the finite quantum tomography of some mixed quantum states such as: qudit tomography, N-qubit tomography, phase tomography and coherent spin state tomography, where ... More
Thermodynamics of Charged Brans-Dicke AdS Black HolesApr 11 2009Aug 01 2009It is well-known that in four dimensions, black hole solution of the Brans-Dikce-Maxwell equations is just the Reissner-Nordstrom solution with a constant scalar field. However, in $n\geq4$ dimensions, the solution is not yet the $(n+1)$-dimensional Reissner-Nordstrom ... More
A multiplicity result for double singularly perturbed elliptic systemsJan 19 2015We show that the number of low energy solutions of a double singularly perturbed Schroedinger Maxwell system type on a smooth 3 dimensional manifold (M,g) depends on the topological properties of the manifold. The result is obtained via Lusternik Schnirelmann ... More
Electric discharge contour dynamics model: the effects of curvature and finite conductivityMar 02 2011Jul 11 2011In this paper we present the complete derivation of the effective contour model for electrical discharges which appears as the asymptotic limit of the minimal streamer model for the propagation of electric discharges, when the electron diffusion is small. ... More
On certain semigroups of full contractions of a finite chainApr 25 2018Let $[n]=\{1,2,\ldots,n\}$ be a finite chain and let $\mathcal{T}_{n}$ be the semigroup of full transformations on $[n]$. Let $\mathcal{CT}_{n}=\{\alpha\in \mathcal{T}_{n}: (for ~all~x,y\in [n])~\left|x\alpha-y\alpha\right|\leq\left|x-y\right|\}$, then ... More
Completeness of the Coulomb scattering wave functionsFeb 01 2006Completeness of the eigenfunctions of a self-adjoint Hamiltonian, which is the basic ingredient of quantum mechanics, plays an important role in nuclear reaction and nuclear structure theory. However, until now, there was no a formal proof of the completeness ... More
Radio structures of the nuclei of nearby Seyfert galaxies and the nature of the missing diffuse emissionNov 04 2009We present archival high spatial resolution VLA and VLBA data of the nuclei of seven of the nearest and brightest Seyfert galaxies in the Southern Hemisphere. At VLA resolution (~0.1 arcsec), the nucleus of the Seyfert galaxies is unresolved, with the ... More
Evidence of parsec-scale jets in Low-luminosity Active Galactic NucleiMar 26 2014Apr 28 2014The nuclear radio emission of low-luminosity active galactic nuclei (LLAGN) is often associated with unresolved cores. In this paper we show that most LLAGN present extended jet radio emission when observed with sufficient angular resolution and sensitivity. ... More
Quasipatterns in parametrically forced systemsOct 26 2006We examine two mechanisms that have been put forward to explain the selection of quasipatterns in single and multi-frequency forced Faraday wave experiments. Both mechanisms can be used to generate stable quasipatterns in a parametrically forced partial ... More
Relativistic entanglement in single-particle quantum states using Non-Linear entanglement witnessesApr 18 2012May 02 2012In this study, the spin-momentum correlation of one massive spin-1/2 and spin-1 particle states, which are made based on projection of a relativistic spin operator into timelike direction is investigated. It is shown that by using Non-Linear entanglement ... More
Generalized Analysis of Elastic Wave Dispersion Asymmetries in Moving Periodic MediaFeb 23 2018Mar 05 2018This work presents a generalized physical interpretation of unconventional dispersion asymmetries associated moving elastic solids. By shifting the notion from systems with time-variant material fields to physically traveling materials, the newly adopted ... More
On the Canonical Form of a Pair of Compatible AntibracketsAug 14 1997In the triplectic quantization of general gauge theories, we prove a `triplectic' analogue of the Darboux theorem: we show that the doublet of compatible antibrackets can be brought to a weakly-canonical form provided the general triplectic axioms of ... More
Can mass loss and overshooting prevent the excitation of g-modes in blue supergiants?Apr 29 2009Thanks to their past history on the main sequence phase, supergiant massive stars develop a convective shell around the helium core. This intermediate convective zone (ICZ) plays an essential role in governing which g-modes are excited. Indeed a strong ... More
Stability beyond the neutron drip-line near the third peak of the r-process nucleosynthesisJan 12 2011Jun 30 2011We have investigated the nuclear shell effects at N=126 in the region of the third peak of the r-process nucleosynthesis within the framework of the relativistic mean-field theory using the Lagrangian model NL-SV1 with the vector self-coupling of omega-meson. ... More
Electromagnetic interactions of mesons induced by the axial-vector -- pseudoscalar mixingsJul 20 2018It is shown that the diagonalization of the axial-vector -- pseudoscalar transitions in the effective meson Lagrangian in presence of electromagnetic interactions leads to a deviation from the vector meson dominance picture which usually arises in the ... More
What happens in the vicinity of the Schwarzschild sphere when nonzero graviton rest mass is presentJul 06 1999Jul 08 1999In this paper a solution for a static spherically symmetric body is thoroughly considered in the framework of the Relativistic Theory of Gravitation. By the comparison of this solution with the Schwarzschild solution in General Relativity their substantial ... More
A compact pulsar wind nebula model of the gamma-ray loud binary LS I +61 303Feb 08 2008Dec 30 2009We study a model of of LS I +61 303 in which its radio to TeV emission is due to interaction of a relativistic wind from a young pulsar with the wind from its companion Be star. We assume the fast polar wind is clumpy, which is typical for radiatively-driven ... More
Magnetic and orbital ordering of RuO2 planes in RuSr2(Eu,Gd)Cu2O8Apr 21 2004We start from an effective Hamiltonian for Ru ions in a square lattice, which includes the on-site interactions between t_2g orbitals derived from Coulomb repulsion, and a tetragonal crystal-field splitting. Using perturbation theory in the hopping terms, ... More
Reduced absorption of light by metallic intra-cavity contacts: Tamm plasmon based laser mode engineeringFeb 23 2013It was widely accepted that embedding of metallic layers into optoelectronic structures is detrimental to lasing due absorption in metal. However, recently macroscopic optical coherence and lasing was observed in microcavities with intra-cavity single ... More
Elementary symmetric functions of two solvents of a quadratic matrix equationApr 18 2008Quadratic matrix equations occur in a variety of applications. In this paper we introduce new permutationally invariant functions of two solvents of the n quadratic matrix equation X^2- L1X - L0 = 0, playing the role of the two elementary symmetric functions ... More
Identification of stars and digital version of E.S.Brodskaya and V.F.Shajn catalogue of 1958Sep 23 2017The following topics are considered: the identification of objects on search maps, the determination of their coordinates at the epoch of 2000, and converting into a machine readable format the published version of E.S. Brodskaya and V.F. Shajn catalogue ... More
Ordered phases of XXZ-symmetric spin-1/2 zigzag ladderOct 31 2003Using bosonization approach, we derive an effective low-energy theory for XXZ-symmetric spin-1/2 zigzag ladders and discuss its phase diagram by a variational approach. A spin nematic phase emerges in a wide part of the phase diagram, either critical ... More
Cohomology and Deformation of Leibniz PairsFeb 06 1995Cohomology and deformation theories are developed for Poisson algebras starting with the more general concept of a Leibniz pair, namely of an associative algebra $A$ together with a Lie algebra $L$ mapped into the derivations of $A$. A bicomplex (with ... More
Ultracold Fermi Gases with Emergent SU(N) SymmetryMar 12 2014We review recent experimental and theoretical progress on ultracold alkaline-earth Fermi gases with emergent SU$(N)$ symmetry. Emphasis is placed on describing the ground-breaking experimental achievements of recent years. The latter include the cooling ... More
Theoretical investigations of superconducting MAX phases Ti2InX (X = C, N)Jun 20 2012Jul 24 2012The structural, elastic, electronic, thermal and optical properties of superconducting MAX phases Ti2InX (X = C, N) are investigated by density functional theory (DFT). The results obtained from the least studied nitride phase are discussed in comparison ... More
Influence of thermal phase fluctuations on the single particle Green function in a 2D d-wave superconductorOct 21 2009Feb 03 2010We study the single-particle Green function for a two-dimensional superconductor in a regime of strong classical phase fluctuations. Although the developed approach is valid for any symmetry, we concentrate on d-wave superconductors. We obtain analytical ... More
Burst Neutrinos from Nitrogen FlashMay 16 2005Sep 07 2005Neutrinos give a novel probe to explore deep interior of astrophysical objects, which otherwise is not accessible with optical observations; among notable examples are solar and supernova neutrinos. We show that there is a new class of strong neutrino ... More
Closure relations for composite bosons: difference between polaritons and Wannier or Frenkel excitonsJun 27 2008Oct 23 2008We derive the closure relation for $N$ polaritons made of three different types of excitons: bosonized excitons, Frenkel or Wannier excitons. In the case of polaritons made of Wannier excitons, we show how this closure relation, which appears as non-diagonal, ... More
Discovery of Rubidium, Strontium, Molybdenum, and Rhodium IsotopesFeb 11 2011Currently, thirty-one rubidium, thirty-five strontium, thirty-five molybdenum and thirty-eight rhodium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, ... More
Generalized percolation in random directed networksJan 21 2005We develop a general theory for percolation in directed random networks with arbitrary two point correlations and bidirectional edges, that is, edges pointing in both directions simultaneously. These two ingredients alter the previously known scenario ... More
Spin-momentum correlation in relativistic single particle quantum statesAug 04 2010This paper was concerned with the spin-momentum correlation in single-particle quantum states, which is described by the mixed states under Lorentz transformations. For convenience, instead of using the superposition of momenta we use only two momentum ... More
Glass Phenomenology from the Connection to Spin GlassesSep 06 2006Jan 17 2007Typical features of glass phenomenology such as the Vogel-Fulcher law, the Kauzmann paradox and the Adam-Gibbs relationship are shown to follow from the recently discovered mapping of glasses to Ising spin glasses in a magnetic field. There seems to be ... More
Orbital correlations in monolayer manganites - From spin t-J model to orbital t-J modelMar 05 2007On the example of monolayer manganites we show that the theoretical ideas developed long ago along the derivation of the spin t-J model from the Hubbard model are nowadays very helpful in strongly correlated oxides with partly filled degenerate orbitals. ... More
Classical limit for Dirac fermions with modified action in the presence of the black holeJun 27 2019We consider the model of Dirac fermions coupled to gravity as proposed in \cite{VolovikBH}, in which superluminal velocities of particles are admitted. In this model an extra term is added to the conventional Hamiltonian that originates from Planck physics. ... More
Dark soliton oscillations in Bose-Einstein condensates with multi-body interactionsJul 11 2009We consider the dynamics of dark matter solitons moving through non-uniform cigar-shaped Bose-Einstein condensates described by the mean field Gross-Pitaevskii equation with generalized nonlinearities, in the case when the condition for the modulation ... More
Enhanced superconducting proximity effect in clean ferromagnetic domain structuresApr 08 2006We investigate the superconducting proximity effect in a clean magnetic structure consisting of two ferromagnetic layered domains with antiparallel magnetizations in contact with a superconductor. Within the quasiclassical Green's function approach we ... More
Three species collisionless reconnection: Effect of O+ on magnetotail reconnectionJun 15 2004Sep 13 2004The nature of collisionless reconnection in a three-species plasma composed of a heavy species, protons, and electrons is examined. Besides the usual two length scales present in two-species reconnection, there are two additional larger length scales ... More
The solar silicon abundance based on 3D non-LTE calculationsSep 23 2016We present three-dimensional (3D) non-local thermodynamic equilibrium (non-LTE) radiative transfer calculations for silicon in the solar photosphere, using an extensive model atom that includes recent, realistic neutral hydrogen collisional cross-sections. ... More