Results for "O. Baran"

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Reference approach in theory of pseudospin systemsMay 19 2019For theoretical description of pseudospin systems with essential short-range and long-range interactions we use the method based on calculations of the free energy functional with taking into account the short-range interactions within the reference approach ... More
Influence of transverse field on the spin-3/2 Blume-Capel model on rectangular latticeMay 14 2019Transverse field effect on thermodynamic properties of the spin-3/2 Blume-Capel model on rectangular lattice in which the interactions in perpendicular directions differ in signs is studied within the mean field approximation. Phase diagrams in the (transverse ... More
K-optimal designs for parameters of shifted Ornstein-Uhlenbeck processes and sheetsApr 19 2016Continuous random processes and fields are regularly applied to model temporal or spatial phenomena in many different fields of science, and model fitting is usually done with the help of data obtained by observing the given process at various time points ... More
Higher symmetries of cotangent coverings for Lax-integrable multi-dimensional partial differential equations and Lagrangian deformationsSep 28 2013Oct 01 2013We present examples of Lax-integrable multi-dimensional systems of partial differential equations with higher local symmetries. We also consider Lagrangian deformations of these equations and construct variational bivectors on them.
Phase diagrams of spin-3/2 Blume-Capel model on rectangular lattice under longitudinal magnetic fieldMay 14 2019The spin-3/2 Blume-Capel model on a rectangular lattice with the ferromagnetic bilinear short-range interaction $K^{\rm F}=K(1+x)$ in one direction and the anti-ferromagnetic one $K^{\rm AF}=K(-1+x)$ in the perpendicular direction under a longitudinal ... More
On the least squares estimator in a nearly unstable sequence of stationary spatial AR modelsMar 17 2008A nearly unstable sequence of stationary spatial autoregressive processes is investigated, when the sum of the absolute values of the autoregressive coefficients tends to one. It is shown that after an appropriate norming the least squares estimator for ... More
Pair correlation functions of the Ising type model with spin 1 within two-particle cluster approximationMay 18 2019The Blume-Emery-Griffiths model on hypercubic lattices within the two-particle cluster approximation is investigated. The expressions for the pair correlation functions in $\bf{k}$-space are derived. On the basis of obtained results (at $\bf{k}=0$) the ... More
Generalized Thermal Lattice GasesMay 07 1998We show how to employ thermal lattice gas models to describe non-equilibrium phenomena. This is achieved by relaxing the restrictions of the usual micro-canonical ensemble for these models via the introduction of thermal ``demons'' in the style of Creutz. ... More
Mode identification for Balloon 090100001 using combined multicolour photometry and spectroscopyFeb 23 2008In this paper, we show that method of mode identification using combined multicolour photometry and spectroscopy can be successfully applied to the pulsating subdwarf B star Balloon 090100001. The method constrains the spherical degree, l.We confirm that ... More
Hierarchy in mid-rapidity fragmentation: mass, isospin, velocity correlationsAug 30 2010May 23 2011We present new features of the transition from nuclear multifragmentation to neck fragmentation in semi-central heavy-ion collisions at Fermi energies as obtained within a microscopic transport model, Stochastic Mean Field (SMF). We show that along this ... More
Dynamical Phase Trajectories in Baryon and Isospin Density SpacesSep 29 2009We review recent results obtained for charge asymmetric systems at Fermi and intermediate energies, ranging from 30 MeV/u to 1 GeV/u. Observables sensitive to the isospin dependent part of nuclear interaction are discussed, providing information on the ... More
K-optimal designs for parameters of shifted Ornstein-Uhlenbeck processes and sheetsApr 19 2016Oct 18 2016Continuous random processes and fields are regularly applied to model temporal or spatial phenomena in many different fields of science, and model fitting is usually done with the help of data obtained by observing the given process at various time points ... More
Probabilistic wind speed forecasting using Bayesian model averaging with truncated normal componentsMay 06 2013May 07 2013Bayesian model averaging (BMA) is a statistical method for post-processing forecast ensembles of atmospheric variables, obtained from multiple runs of numerical weather prediction models, in order to create calibrated predictive probability density functions ... More
Fitting ideals and the Gorenstein propertyFeb 18 2009Oct 14 2009Let p be a prime number and G be a finite commutative group such that p^{2} does not divide the order of G. In this note we prove that for every finite module M over the group ring Z_{p}[G], the inequality #M \leq #Z_{p}[G]/Fit_{Z_{p}[G]}(M) holds. Here, ... More
Effects of symmetry energy and momentum dependent interaction on low-energy reaction mechanismsOct 13 2015We study the dipole response associated with the Pygmy Dipole Resonance (PDR) and the Isovector Giant Dipole Resonance (IVGDR), in connection with specific properties of the nuclear effective interaction (symmetry energy and momentum dependence), in the ... More
Dipole response in neutron-rich nuclei with new Skyrme interactionsMar 11 2016We investigate the isoscalar and isovector E1 response of neutron-rich nuclei, within a semi-classical transport model employing effective interactions for the nuclear mean-field. In particular, we adopt the recently introduced SAMi-J Skyrme interactions, ... More
A Modular Curve of Level 9 and the Class Number One ProblemJan 30 2008Feb 18 2009In this note we give an explicit parametrization of the modular curve associated to the normalizer of a non-split Cartan subgroup of level 9. We determine all integral points of this modular curve. As an application, we give an alternative solution to ... More
Pre-equilibrium effects in charge-asymmetric low-energy reactionsDec 19 2016We study the pre-equilibrium dipole response in the charge-asymmetric reaction $^{132}$Sn+$^{58}$Ni at $E_{lab}=10$ MeV/A, within a semi-classical transport model employing effective interactions for the nuclear mean-field. In particular, we adopt the ... More
On the variances of a spatial unit root modelJun 29 2010Sep 03 2010The asymptotic properties of the variances of the spatial autoregressive model $X_{k,\ell}=\alpha X_{k-1,\ell}+\beta X_{k,\ell-1}+\gamma X_{k-1,\ell-1}+\epsilon_{k,\ell}$ are investigated in the unit root case, that is when the parameters are on the boundary ... More
A Dolbeault-Grothendieck Resolution for Singular SpacesJul 13 2017We construct a generalization of the Dolbeault-Grothendieck resolution on a singular complex space. The same construction yields, for each morphism of analytic spaces, a pullback mapping between the respective Dolbeault-Grothendieck resolutions. As in ... More
Nonlocal symmetries of Lax integrable equations: a comparative studyNov 15 2016We continue here the study of Lax integrable equations. We consider four three-dimensional equations: (1) the rdDym equation $u_{ty} = u_x u_{xy} - u_y u_{xx}$, (2) the 3D Pavlov equation $u_{yy} = u_{tx} + u_y u_{xx} - u_x u_{xy}$; (3) the universal ... More
Integrability properties of some symmetry reductionsDec 19 2014In our recent paper [H. Baran, I.S. Krasil'shchik, O.I. Morozov, P. Voj{\v{c}}{\'{a}}k, Symmetry reductions and exact solutions of Lax integrable $3$-dimensional systems, Journal of Nonlinear Mathematical Physics, Vol. 21, No. 4 (December 2014), 643--671; ... More
Symmetry reductions and exact solutions of Lax integrable $3$-dimensional systemsJul 01 2014We present a complete description of $2$-dimensional equations that arise as symmetry reductions of fourf $3$-dimensional Lax-integrable equations: (1) the universal hierarchy equation~$u_{yy}=u_zu_{xy}-u_yu_{xz}$; (2) the 3D rdDym equation $u_{ty}=u_xu_{xy}-u_yu_{xx}$; ... More
Coverings over Lax integrable equations and their nonlocal symmetriesJul 03 2015Jul 20 2015Using the Lax representation with non-removable parameter, we construct two hierarchies of nonlocal conservation laws for the 3D rdDym equation $u_{ty} = u_xu_{xy} - u_yu_{xx}$ and describe the algebras of nonlocal symmetries in the corresponding coverings. ... More
Nonlocal symmetries of Lax integrable equations: a comparative studyNov 15 2016Dec 24 2016We continue here the study of Lax integrable equations. We consider four three-dimensional equations: (1) the rdDym equation $u_{ty} = u_x u_{xy} - u_y u_{xx}$, (2) the 3D Pavlov equation $u_{yy} = u_{tx} + u_y u_{xx} - u_x u_{xy}$; (3) the universal ... More
Berezin-Toeplitz quantization, hyperkahler manifolds, and multisymplectic manifoldsJun 19 2014Nov 13 2015We suggest a way to quantize, using Berezin-Toeplitz quantization, a compact hyperkahler manifold (equipped with a natural 3-plectic form), or a compact integral Kahler manifold of complex dimension n regarded as a (2n-1)-plectic manifold. We show that ... More
Multiobjective Optimization in a Quantum Adiabatic ComputerMay 10 2016Oct 03 2016In this work we present a quantum algorithm for multiobjective combinatorial optimization. We show that the adiabatic algorithm of Farhi et al. [arXiv:quant-ph/0001106] can be used by mapping a multiobjective combinatorial optimization problem onto a ... More
Fingerprints of ChaosApr 13 1998The asymptotic distance between trajectories $d_{\infty}$, is studied in detail to characterize the occurrence of chaos. We show that this quantity is quite distinct and complementary to the Lyapunov exponents, and it allows for a quantitave estimate ... More
Comparison of delta- and Gogny-type pairing interactionsNov 04 2003The matrix elements of the zero-range $\delta$-force and the finite range Gogny-type pairing force are compared. The strengths of the $\delta$-interaction for rare-earth nuclei are adjusted. Pairing gaps resulting from different pairing interactions are ... More
Kondo Lattice Behavior Observed in the CeCu$_9$In$_2$ CompoundJun 25 2019We report systematic studies of CeCu$_9$In$_2$, which appears to be a new Kondo lattice system. Electrical resistivity exhibits a logarithmic law characteristic of Kondo systems with a broad maximum at $T_{coh}\approx$45 K and it obeys the Fermi liquid ... More
On the Brain Networks of Complex Problem SolvingOct 10 2018Complex problem solving is a high level cognitive process which has been thoroughly studied over the last decade. The Tower of London (TOL) is a task that has been widely used to study problem-solving. In this study, we aim to explore the underlying cognitive ... More
Asymmetric nuclear matter:the role of the isovector scalar channelDec 12 2001We try to single out some qualitative new effects of the coupling to the $\delta$-isovector-scalar meson introduced in a minimal way in a phenomenological hadronic field theory. Results for the equation of state ($EOS$) and the phase diagram of asymmetric ... More
Dynamics of Phase Transitions in Asymmetric Nuclear MatterJan 10 2003We present several possibilities offered by the reaction dynamics of dissipative heavy ion collisions to study in detail the symmetry term of the nuclear equation of state, $EOS$. In particular we discuss isospin effects on the nuclear liquid-gas phase ... More
On the collectivity of Pygmy Dipole Resonance within schematic TDA and RPA modelsNov 25 2014Dec 22 2014Within schematic models based on the Tamm-Dancoff Approximation and the Random-Phase Approximation with separable interactions, we investigate the physical conditions which determine the emergence of the Pygmy Dipole Resonance in the E1 response of atomic ... More
Connecting the Pygmy Dipole Resonance to the neutron skinJun 20 2013Jun 18 2014We study the correlation between the neutron skin development and the low-energy dipole response associated with the pygmy dipole resonance (PDR) in connection with the properties of symmetry energy. We perform our investigation within a microscopic transport ... More
On integrability of Weingarten surfaces: a forgotten classFeb 04 2010Rediscovered by a systematic search, a forgotten class of integrable surfaces is shown to disprove the Finkel-Wu conjecture. The associated integrable nonlinear partial differential equation $$ z_{yy} + (1/z)_{xx} + 2 = 0 $$ possesses a zero curvature ... More
Classification of integrable Weingarten surfaces possessing an sl(2)-valued zero curvature representationFeb 04 2010In this paper we classify Weingarten surfaces integrable in the sense of soliton theory. The criterion is that the associated Gauss equation possesses an sl(2)-valued zero curvature representation with a nonremovable parameter. Under certain restrictions ... More
Bivariate ensemble model output statistics approach for joint forecasting of wind speed and temperatureJul 13 2015Jul 27 2015Forecast ensembles are typically employed to account for prediction uncertainties in numerical weather prediction models. However, ensembles often exhibit biases and dispersion errors, thus they require statistical post-processing to improve their predictive ... More
Log-normal distribution based EMOS models for probabilistic wind speed forecastingJul 11 2014Ensembles of forecasts are obtained from multiple runs of numerical weather forecasting models with different initial conditions and typically employed to account for forecast uncertainties. However, biases and dispersion errors often occur in forecast ... More
Nuclear Periphery in Mean-Field ModelsOct 30 2003The halo factor is one of the experimental data which describes a distribution of neutrons in nuclear periphery. In the presented paper we use Skyrme-Hartree (SH) and the Relativistic Mean Field (RMF) models and we calculate the neutron excess factor ... More
Parameter estimation in a spatial unit root autoregressive modelFeb 16 2011Oct 02 2011Spatial unilateral autoregressive model $X_{k,\ell}=\alpha X_{k-1,\ell}+\beta X_{k,\ell-1}+\gamma X_{k-1,\ell-1}+\epsilon_{k,\ell}$ is investigated in the unit root case, that is when the parameters are on the boundary of the domain of stability that ... More
Parameter estimation in linear regression driven by a Gaussian sheetNov 09 2011The problem of estimating the parameters of a linear regression model $Z(s,t)=m_1g_1(s,t)+ \cdots + m_pg_p(s,t)+U(s,t)$ based on observations of $Z$ on a spatial domain $G$ of special shape is considered, where the driving process $U$ is a Gaussian random ... More
Censored and shifted gamma distribution based EMOS model for probabilistic quantitative precipitation forecastingDec 13 2015Apr 01 2016Recently all major weather prediction centres provide forecast ensembles of different weather quantities which are obtained from multiple runs of numerical weather prediction models with various initial conditions and model parametrizations. However, ... More
Quasiparticles of periodically driven quantum dot coupled between superconducting and normal leadsMar 25 2019We investigate subgap quasiparticles of a single level quantum dot coupled to the superconducting and normal leads, whose energy level is periodically driven by external potential. Using the Floquet formalism we determine the quasienergies and analyze ... More
On the optimal designs for the prediction of complex Ornstein-Uhlenbeck processesAug 10 2018Physics, chemistry, biology or finance are just some examples out of the many fields where complex Ornstein-Uhlenbeck (OU) processes have various applications in statistical modelling. They play role e.g. in the description of the motion of a charged ... More
Combining predictive distributions for statistical post-processing of ensemble forecastsJul 27 2016Weather predictions typically take the form of forecast ensembles obtained from multiple runs of numerical weather prediction models with varying initial conditions and model physics. Due to systematic biases and errors in calibration, ensemble forecasts ... More
Joint probabilistic forecasting of wind speed and temperature using Bayesian model averagingApr 14 2014Ensembles of forecasts are typically employed to account for the forecast uncertainties inherent in predictions of future weather states. However, biases and dispersion errors often present in forecast ensembles require statistical post-processing. Univariate ... More
On velocity profiles, stresses and Bagnold scaling of sheared granular system in zero gravityNov 17 2004We report the results of three-dimensional molecular dynamics simulations of sheared granular system in a Couette geometry.\cite{movies} The simulations use realistic boundary conditions that may be expected in physical experiments. For a range of boundary ... More
Influence Process Structural Learning and the Emergence of Collective IntelligenceJun 29 2014Recent work [Hazy 2012] has demonstrated computationally that collectives that are organized into networks which govern the flow of resources can learn to recognize newly emerging opportunities distributed in the environment. This paper argues that the ... More
Optimal designs for parameters of shifted Ornstein-Uhlenbeck sheets measured on monotonic setsNov 30 2013Measurement on sets with a specific geometric shape can be of interest for many important applications (e.g. measurement along the isotherms in structural engineering). In the present paper the properties of optimal designs for estimating the parameters ... More
Mixture EMOS model for calibrating ensemble forecasts of wind speedJul 23 2015Dec 11 2015Ensemble model output statistics (EMOS) is a statistical tool for post-processing forecast ensembles of weather variables obtained from multiple runs of numerical weather prediction models in order to produce calibrated predictive probability density ... More
Combining predictive distributions for statistical post-processing of ensemble forecastsJul 27 2016Nov 16 2016Weather predictions typically take the form of forecast ensembles obtained from multiple runs of numerical weather prediction models with varying initial conditions and model physics. Due to systematic biases and errors in calibration, ensemble forecasts ... More
Generalized Nikolskii's property and asymptotic exponent in Markov's inequalityJun 22 2017We introduce an asymptotic Markov's exponent and show that it is equal to Markov's exponent for a wide class of norms. As a consequence we obtain a lower bound for the optimal exponent in Markov's inequality considered with the norms possessing Nikolskii ... More
Spurious frequencies in the {\it Kepler} short cadence dataJun 23 2013We present our search for artifacts in the {\it Kepler} short cadence data using a commonly known Fourier technique. We analyzed data on a monthly basis searching for a possible correlation between artifacts and the events attributed to the spacecraft ... More
Vanishing ideals of parameterised toric codesFeb 12 2018Let $X$ be a complete simplicial toric variety over a finite field. For any matrix $Q$ with integer entries, we are interested in evaluation codes on the subset $Y_Q$ of $X$ parameterized by the columns of $Q$. We give an algorithmic method relying on ... More
Multiobjective Optimization in a Quantum Adiabatic ComputerMay 10 2016Jun 30 2017In this work we present a quantum algorithm for multiobjective combinatorial optimization. We show how to map a convex combination of objective functions onto a Hamiltonian and then use that Hamiltonian to prove that the quantum adiabatic algorithm of ... More
Optimizing expected utility of dividend payments for a Erlang risk processOct 25 2011We consider the problem of maximizing the expected utility of discounted dividend payments of an insurance company whose reserves are modeled as a Cram\'er risk process with Erlang claims. We focus on the exponential claims and power and logarithmic utility ... More
Similarity-based semi-local estimation of EMOS modelsSep 11 2015Weather forecasts are typically given in the form of forecast ensembles obtained from multiple runs of numerical weather prediction models with varying initial conditions and physics parameterizations. Such ensemble predictions tend to be biased and underdispersive ... More
Bonds with volatilities proportional to forward ratesNov 05 2009The problem of existence of solution for the Heath-Jarrow-Morton equation with linear volatility and purely jump random factor is studied. Sufficient conditions for existence and non-existence of the solution in the class of bounded fields are formulated. ... More
A Coordinated Volt-Var Control Scheme for Distribution Systems with High DER PenetrationOct 03 2018Dec 29 2018In this paper, a new Volt/Var Control (VVC) scheme is proposed to facilitate the coordination between the conventional VVC devices and the new smart PV inverters to provide an effective voltage control on a system with high PV penetration. The proposed ... More
Optimal Adaptive Algorithms for Finding the Nearest and Farthest Point on a Parametric Black-Box CurveJul 03 2003Jun 10 2004We consider a general model for representing and manipulating parametric curves, in which a curve is specified by a black box mapping a parameter value between 0 and 1 to a point in Euclidean d-space. In this model, we consider the nearest-point-on-curve ... More
N-Block Separable Random Phase Approximation: Application to metal clusters and C60 fullereneJul 28 2015Starting from the Random Phase Approximation (RPA), we generalize the schematic model of separable interaction defning subspaces of ph excitations with different coupling constants between them. This ansatz simplifies the RPA eigenvalue problem to a finite, ... More
$C^{1, α}$ Regularity for degenerate fully nonlinear elliptic equations with Neumann boundary conditionsMar 28 2019In this paper, we establish $C^{1, \alpha}$ regularity upto the boundary for a class of degenerate fully nonlinear elliptic equations with Neumann boundary conditions. Our main result Theorem 2.1 constitutes the boundary analogue of the interior $C^{1, ... More
Borderline gradient estimates at the boundary in Carnot groupsMay 06 2019In this article, we prove the continuity of the horizontal gradient near a $C^{1,\text{Dini}}$ non-characteristic portion of the boundary for solutions to $\Gamma^{0, \text{Dini}}$ perturbations of horizontal Laplaceans as in (1.1) below where the scalar ... More
Optical response of C60 fullerene from a Time Dependent Thomas Fermi approachAug 08 2014Dec 16 2014We study the collective electron dynamics in C60 clusters within the Time Dependent Thomas Fermi method in the frame of jellium model. The results regarding the optical spectrum are in good agreement with the experimental data, our simulations being able ... More
Virtual Machine Placement Literature ReviewJun 04 2015Cloud Computing Datacenters host millions of virtual machines (VMs) on real world scenarios. In this context, Virtual Machine Placement (VMP) is one of the most challenging problems in cloud infrastructure management, considering also the large number ... More
An efficient CNN for spectral reconstruction from RGB imagesApr 12 2018Recently, the example-based single image spectral reconstruction from RGB images task, aka, spectral super-resolution was approached by means of deep learning by Galliani et al. The proposed very deep convolutional neural network (CNN) achieved superior ... More
General static polarizability in spherical neutral metal clusters and fullerenes within Thomas-Fermi theoryJun 15 2014We study the static linear response in spherical Thomas-Fermi systems deriving a simple diferen- tial equation for general multipolar moments and associated polarizabilities. We test the equation on sodium clusters between 20 and 100 atoms and on fullerenes ... More
RAT0455+1305: another pulsating hybrid sdB starDec 22 2009RAT0455+1305 was discovered during the Rapid Temporal Survey which aims in finding any variability on timescales of a few minutes to several hours. The star was found to be another sdBV star with one high amplitude mode and relatively long period. These ... More
Hölder continuity of pluricomplex Green function and Markov brothers' inequalityMar 07 2013Let V_E be the pluricomplex Green function associated to a compact subset E of C^N. The well known H\"older Continuity Property of E means that there exist constants B > 0, 0< c =< 1 such that V_E(z) =< B dist(z,E)^c. The main result of this paper says ... More
Empirical Determination of Convection Parameters in White Dwarfs I : Whole Earth Telescope Observations of EC14012-1446Apr 11 2012We report on analysis of 308.3 hrs of high speed photometry targeting the pulsating DA white dwarf EC14012-1446. The data were acquired with the Whole Earth Telescope (WET) during the 2008 international observing run XCOV26. The Fourier transform of the ... More
The XXL Survey XVIII. ATCA 2.1 GHz radio source catalogue and source counts for the XXL-South fieldMar 30 2017The 2.1 GHz radio source catalogue of the 25 deg$^2$ ultimate XMM extragalactic survey south (XXL-S) field, observed with the Australia Telescope Compact Array (ATCA), is presented. The final radio mosaic achieved a resolution of $\sim$$4.8"$ and a median ... More
Thermal model at RHIC, part II: elliptic flow and HBT radiiDec 12 2002We continue the analysis of the preceding talk with a discussion of the elliptic flow and the HBT pion correlation radii. It is shown that the thermal model can be extended to describe these phenomena. The description of the elliptic flow involves an ... More
Web Services for Asynchronous, Distributed Optimization Using Conservative Signal ProcessingSep 21 2015Sep 24 2015This paper presents a systematic approach for implementing a class of nonlinear signal processing systems as a distributed web service, which in turn is used to solve optimization problems in a distributed, asynchronous fashion. As opposed to requiring ... More
Neck fragmentation reaction mechanismSep 19 2003Based on a microscopic transport model, we study the origin of nonstatistical Intermediate Mass Fragment ($IMF$) production in semicentral heavy ion collisions at the Fermi energies. We show that a fast, dynamical $IMF$ formation process, the {\it neck ... More
Analytical approach for the Quartet Condensation ModelJan 15 2019Within the Quartet Condensation Model (QCM), the isovector pairing correlations for $N = Z$ nuclei are described with a very high accuracy by a condensate of $\alpha$-like quartets. The usual approach involves cumbersome recurrence relations in order ... More
New features of collective motion of intrinsic degrees of freedom. Toward a possible way to classify the intrinsic statesMay 15 2002Three exactly solvable Hamiltonians of complex structure are studied in the framework of a semi-classical approach. The quantized trajectories for intrinsic coordinates correspond to energies which may be classified in collective bands. For two of the ... More
Comparison of BMA and EMOS statistical calibration methods for temperature and wind speed ensemble weather predictionDec 13 2013The evolution of the weather can be described by deterministic numerical weather forecasting models. Multiple runs of these models with different initial conditions and/or model physics result in forecast ensembles which are used for estimating the distribution ... More
Optimal designs for the methane flux in troposphereApr 07 2014Jun 01 2015The understanding of methane emission and methane absorption plays a central role both in the atmosphere and on the surface of the Earth. Several important ecological processes, e.g., ebullition of methane and its natural microergodicity request better ... More
First Kepler results on compact pulsators VII. Pulsating subdwarf B stars detected in the second half of the survey phaseMar 08 2011We present five new pulsating subdwarf B (sdB) stars discovered by the Kepler spacecraft during the asteroseismology survey phase. We perform time-series analysis on the nearly continuous month-long Kepler datasets of these 5 objects; these datasets provide ... More
Star-forming galaxies versus low- and high-excitation radio AGN in the VLA-COSMOS 3GHz Large ProjectMar 18 2016We study the composition of the faint radio population selected from the VLA-COSMOS 3GHz Large Project, a radio continuum survey performed at 10 cm wavelength. The survey covers the full 2 square degree COSMOS field with mean $rms\sim2.3$ $\mu$Jy/beam, ... More
XXL Survey XXI. The environment and clustering of X-ray AGN in the XXL-South fieldDec 05 2017Feb 03 2018This work is part of a series of studies focusing on the environment and the properties of the X-ray selected active galactic nuclei (AGN) population from the XXL survey. The present survey, given its large area, continuity, extensive multiwavelength ... More
State dependent $δ$-pairing and spontaneous fissionNov 02 2003We examine the fission barriers, mass parameters and spontaneous fission half lives of fermium isotopes within the framework of macroscopic-microscopic model with a $\delta$-pairing interaction. Four different macroscopic models are applied and studied. ... More
Mean-field instabilities and cluster formation in nuclear reactionsApr 13 2016We review recent results on intermediate mass cluster production in heavy ion collisions at Fermi energy and in spallation reactions. Our studies are based on modern transport theories, employing effective interactions for the nuclear mean-field and incorporating ... More
Solar like oscillations in the stars KIC 5390438 and KIC 5701829 observed by KeplerAug 07 2012Sep 22 2012The preliminary results of an analysis of the KIC 5390438 and KIC 5701829 light curves are presented. The variations of these stars were detected by Baran et al. (2011a) in a search for pulsating M dwarfs in the Kepler public database. The objects have ... More
Influence of Rashba and Dresselhaus spin-orbit interactions of equal strengths on electron states in a circular quantum ring in the presence of a magnetic fieldDec 18 2012Solutions of the Schr\"odinger equation are obtained for an electron in a two-dimensional circular semiconductor quantum ring in the presence of both external uniform constant magnetic field and the Rashba and Dresselhaus spin-orbit interactions of equal ... More
Signal Processing Structures for Solving Conservative Constraint Satisfaction ProblemsOct 18 2015This primary purpose of this paper is to succinctly state a number of verifiable and tractable sufficient conditions under which a particular class of conservative signal processing structures may be readily used to solve a companion class of constraint ... More
Conservative Signal Processing Architectures For Asynchronous, Distributed Optimization Part II: Example SystemsJul 01 2014Mar 04 2015This paper provides examples of various synchronous and asynchronous signal processing systems for performing optimization, utilizing the framework and elements developed in a preceding paper. The general strategy in that paper was to perform a linear ... More
A detection threshold in the amplitude spectra calculated from Kepler data obtained during K2 missionDec 08 2014We present our analysis of simulated data in order to derive a detection threshold which can be used in the pre-whitening process of amplitude spectra. In case of ground-based data of pulsating stars, this threshold is conventionally taken to be four ... More
Unified description of pairing and quarteting correlations within the particle-hole-boson approachJan 31 2019Feb 17 2019We present a new bosonic approximation for the projected-BCS (PBCS) and Quartet Condensation Model (QCM). In each case, the starting point is the reformulation of the pair/quartet condensate state in terms of particle-hole excitations with respect to ... More
Probabilistic temperature forecasting with statistical calibration in HungaryMar 08 2013Weather forecasting is mostly based on the outputs of deterministic numerical weather forecasting models. Multiple runs of these models with different initial conditions result in forecast ensembles which is are used for estimating the distribution of ... More
Probabilistic wind speed forecasting in HungaryFeb 20 2012Jan 07 2013Prediction of various weather quantities is mostly based on deterministic numerical weather forecasting models. Multiple runs of these models with different initial conditions result ensembles of forecasts which are applied for estimating the distribution ... More
Feynman-Kac Formulas for Regime-Switching Jump Diffusions and their ApplicationsFeb 06 2017This work develops Feynman-Kac formulas for a class of regime-switching jump diffusion processes, in which the jump part is driven by a Poisson random measure associated to a general L\'evy process and the switching part depends on the jump diffusion ... More
D-optimal designs for complex Ornstein-Uhlenbeck processesApr 19 2017Complex Ornstein-Uhlenbeck (OU) processes have various applications in statistical modelling. They play role e.g. in the description of the motion of a charged test particle in a constant magnetic field or in the study of rotating waves in time-dependent ... More
Testing stability in a spatial unilateral autoregressive modelMar 20 2012Least squares estimator of the stability parameter $\varrho := |\alpha| + |\beta|$ for a spatial unilateral autoregressive process $X_{k,\ell}=\alpha X_{k-1,\ell}+\beta X_{k,\ell-1}+\varepsilon_{k,\ell}$ is investigated. Asymptotic normality with a scaling ... More
pion-rho-omega vertex in nuclear matterFeb 14 2002Medium modifications of the pion-omega-rho vertex are analyzed in context of the omega -> pi gamma* and rho -> pi gamma* decays in nuclear matter. A relativistic hadronic model with mesons, nucleons, and Delta(1232)isobars is applied. A substantial increase ... More
Fast 3D Variable-FOV Reconstruction for Parallel Imaging with Localized SensitivitiesDec 01 2016Feb 06 2017Several successful iterative approaches have recently been proposed for parallel-imaging reconstructions of variable-density (VD) acquisitions, but they often induce substantial computational burden for non-Cartesian data. Here we propose a generalized ... More
Distributions of the $S$-matrix poles in Woods-Saxon and cut-off Woods-Saxon potentialsNov 20 2015Apr 19 2016The positions of the $l=0$ $S$-matrix poles are calculated in generalized Woods-Saxon (GWS) potential and in cut-off generalized Woods-Saxon (CGWS) potential. The solutions of the radial equations are calculated numerically for the CGWS potential and ... More
Thermal approach to RHICSep 24 2002Applications of a simple thermal model to ultra-relativistic heavy-ion collisions are presented. We compute abundances of various hadrons, including particles with strange quarks, the pT-spectra, and the HBT radii for the pion. Surprising agreement is ... More
Pairing and alpha-decayOct 26 2006Nuclear pairing interaction plays a crucial role in both macroscopic-microscopic and fully macroscopic descriptions of nuclei. In the present study we discuss different pairing interactions (monopole and delta pairing forces) and the methods allowing ... More