Search results for " function"

showing 10 items of 9395 documents

Granica państwa jako kategoria wielowymiarowa

2013

Istnienie granic państwowych wynika przede wszystkim z przypisania państwom terytorium, a także z właściwego wspólnotom ludzkim instynktu terytorialności. Granica państwa, wyznaczając położenie geograficzne terytorium, określa nie tylko obszar państwa, ale spełnia również określone funkcje, które w podstawowym wymiarze mają charakter wewnętrzny i zewnętrzny. Mimo że na wielu obszarach granice zachowały tradycyjną funkcję bariery, współczesne granice nie funkcjonują już w ten sam sposób, jak jeszcze w niedalekiej przeszłości. W warunkach globalizacji kultury oraz internacjonalizacji polityki i gospodarki nastąpiło otwarcie granic i związane z tym osłabienie kontroli granicznej, stanowiącej d…

granicaborderland’ culturekultura pograniczatypologie granicbordernational identityprocesy integracyjnefunkcje granictożsamość narodowaborder functionstypologies of bordersintegration processPogranicze : Polish Borderlands Studies
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Mur berliński jako granica i linia frontu w czasach zimnej wojny

2018

Celem artykułu jest prezentacja okoliczności budowy, a następnie funkcji pełnionych w czasach zimnej wojny przez mur berliński. Mur został wzniesiony w 1961 r. i stanowił efekt kulminacji konfliktu między ZSRR i aliantami zachodnimi. Władzom w NRD zależało na jego budowie, aby zatrzymać emigrację ludności z Niemiec Wschodnich do Berlina Zachodniego, a następnie do RFN. Po 2015 r. na granicach wielu państw europejskich także budowane są mury, mające uniemożliwić wjazd imigrantów, szczególnie nielegalnych. W tym kontekście warto przyjrzeć się funkcjom pełnionym przez mur berliński, w tym funkcji: politycznej, strategicznej, ekonomicznej, społecznej, symbolicznej i kulturotwórczej. Na podstawi…

granicazimna wojnaBerlin WallCold Warborderfunkcje granicymur berlińskiborder functionsPogranicze. Polish Borderlands Studies
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Polyamide 6/Graphene Oxide Nanohybrids

2013

graphene oxide polyamide functionalizazion nanocomposites
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Many-body Green's function theory for electron-phonon interactions: ground state properties of the Holstein dimer

2015

We study ground-state properties of a two-site, two-electron Holstein model describing two molecules coupled indirectly via electron-phonon interaction by using both exact diagonalization and self-consistent diagrammatic many-body perturbation theory. The Hartree and self-consistent Born approximations used in the present work are studied at different levels of self-consistency. The governing equations are shown to exhibit multiple solutions when the electron-phonon interaction is sufficiently strong whereas at smaller interactions only a single solution is found. The additional solutions at larger electron-phonon couplings correspond to symmetry-broken states with inhomogeneous electron de…

ground state propertiesGeneral Physics and AstronomyFOS: Physical sciences02 engineering and technology53001 natural sciencesCondensed Matter - Strongly Correlated Electronssymbols.namesakeQuantum mechanics0103 physical sciencesSymmetry breakingPhysical and Theoretical ChemistryBorn approximationPerturbation theory010306 general physicsPhysicsBipolaronta114Strongly Correlated Electrons (cond-mat.str-el)many-body perturbation theoryHartree540021001 nanoscience & nanotechnologySymmetry (physics)3. Good healthGreen's functionelectron-phonon interactionsymbols0210 nano-technologyGround state
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Balance equations-based properties of the Rabi Hamiltonian

2014

A stationary physical system satisfies peculiar balance conditions involving mean values of appropriate observables. In this paper we show how to deduce such quantitative links, named balance equations, demonstrating as well their usefulness in bringing to light physical properties of the system without solving the Schrodinger equation. The knowledge of such properties in the case of Rabi Hamiltonian is exploit to provide arguments to make easier the variational engineering of the ground state of this model.

ground state variational approach Wigner function Rabi model balance equationsQuantum PhysicsFOS: Physical sciencesMathematical Physics (math-ph)Quantum Physics (quant-ph)Mathematical Physics
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Comparison between the MHFEM formulation and a 2nd spatial order FV formulation of the linear ground problem

2008

groundwater finite elements method mixed hybrid finite elements method finite volumes method positive-definite matrix M-property Raviart-Thomas basis function
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Comparison of different 2nd order formulations for the solution of the 2D groundwater flow problem over irregular triangular meshes

2009

Mixed and Mixed Hybrid Finite Elements (MHFE) methods have been widely used in the last decade for simulation of groundwater flow problem, petroleum reservoir problems, potential flow problems, etc. The main advantage of these methods is that, unlike the classical Galerkin approach, they guarantee local and global mass balance, as well the flux continuity between inter-element sides. The simple shape of the control volume, where the mass conservation is satisfied, makes also easier to couple this technique with a Finite Volume technique in the time splitting approach for the solution of advection-dispersion problems. In the present paper, a new MHFE formulation is proposed for the solution …

groundwater finite elements method mixed hybrid finite elements method finite volumes method positive-definite matrix M-property Raviart-Thomas basis functionSettore ICAR/01 - Idraulica
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Spatially dependent parton distribution functions and hard processes in nuclear collisions

2014

hadron productionparton distribution functionsHeavy ion phenomenologythermal photonsNuclear PDFsHard processestermiset fotonitnuclear collisionsfragmentation functionsDirect photonsQCD phenomenologypartonijakaumatfragmentaatiofunktiotydintörmäyksetForward rapiditiesteoreettinen fysiikkaProton+nucleus collisionshadronituotto
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First measurement of the Sivers asymmetry for gluons using SIDIS data

2017

The Sivers function describes the correlation between the transverse spin of a nucleon and the transverse motion of its partons. It was extracted from measurements of the azimuthal asymmetry of hadrons produced in semi-inclusive deep inelastic scattering of leptons off transversely polarised nucleon targets, and it turned out to be non-zero for quarks. In this letter the evaluation of the Sivers asymmetry for gluons in the same process is presented. The analysis method is based on a Monte Carlo simulation that includes three hard processes: photon-gluon fusion, QCD Compton scattering and leading-order virtual-photon absorption process. The Sivers asymmetries of the three processes are simul…

hadron: angular distributionmuon+: polarized beamNuclear TheoryPartonmuon+ deuteron: deep inelastic scatteringhadron: transverse momentumtransverse momentum dependence01 natural sciencesCOMPASSHigh Energy Physics - ExperimentSubatomär fysikSivers functionHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)photon gluon: fusionSubatomic Physics[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]partonNuclear Experimentmedia_commonQuantum chromodynamicsPhysicsgluon: distribution functiondeep inelastic scattering: semi-inclusive reactionhigher-order: 0polarized target: transversehep-phDeep inelastic scattering; Gluon; PDF; Sivers; TMD; Nuclear and High Energy Physicslcsh:QC1-999High Energy Physics - PhenomenologySivereffect: CollinsNucleonCompton scatteringnumerical calculations: Monte Carlospin: asymmetryParticle Physics - ExperimentDeep inelastic scatteringQuarkParticle physicsNuclear and High Energy Physicsdata analysis methoddeuteron: polarized targethadron: asymmetryangular distribution: asymmetryneural networkmedia_common.quotation_subjectpolarization: longitudinalFOS: Physical sciencesAsymmetryPDFGluonNuclear physics[ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]0103 physical sciencesquantum chromodynamicsSivers010306 general physicsParticle Physics - Phenomenology010308 nuclear & particles physicshep-ex160 GeV/cHigh Energy Physics::PhenomenologyTMDnucleon: spin: transverseCERN SPSDeep inelastic scatteringGluonmuon+ p: deep inelastic scatteringcorrelation[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph][ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph]High Energy Physics::Experimentabsorptionlcsh:PhysicsLeptonexperimental results
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Escaping scaling relationships for water dissociation at interfacial sites of zirconia-supported Rh and Pt clusters

2019

<p>Water dissociation is an important reaction involved in many industrial processes and a good model reaction for probing the activity of catalytic sites. In this computational study, the dissociation of water at interfacial sites of globally optimized ZrO2 sup- ported Pt and Rh clusters is investigated under the framework of density functional theory. Our findings demonstrate that the perimeter sites of these small clusters can activate water, but the dissociation behavior varies considerably between sites. It is shown that the studied clusters break scaling relationships for water dissociation, suggesting these catalysts may achieve activities beyond the maximum imposed by such rel…

hajotus010304 chemical physics010405 organic chemistryChemistrytiheysfunktionaaliteoriaGeneral Physics and AstronomyHeterogeneous catalysis010402 general chemistrylaskennallinen kemia01 natural sciencesDissociation (chemistry)Dissociation reaction0104 chemical sciencesCatalysisPt clusterskatalyytitChemical physics0103 physical sciencesrajapinnat (pinnat)Density functional theoryCubic zirconiananohiukkasetPhysical and Theoretical ChemistryScalingSelf-ionization of water
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