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Search Results: 1 - 10 of 338 matches for " Juraj Macek "
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Historical and geochemical outlines of the oil-gas seepage near Turzovka town; Flysch belt, NW Slovakia
Ján Mili?ka,Juraj Macek
Acta Geologica Slovaca , 2012,
Abstract: Small oil deposits located in Korňa near the town of Turzovka in north-western Slovakia and other small deposits located in the Miková region of northern-eastern Slovakia were the first oil deposits discovered and exploited in these parts of the Western Carpathians. Small volumes of oil, natural gas and water rises to the surface on a northern slope in Korňa and several tenths of metres further on these descends into the soil cover and entered the local Kornianka creek. Korňa and its broader surrounds are geologically part of the Magura Nappe of the Carpathian Flysch Belt. The preliminary gas chromatography results indicate weakly biodegraded mature oil with a prevailing aliphatic hydrocarbon fraction. Weak biodegradation and continuous outflow over 100 years following its discovery in 1901 indicate its connection with a deeper oil reservoir. Although methane is the dominant component of this natural gas, the presence of higher gaseous hydrocarbons with the methane carbon isotopic composition indicates a methane gas associated with the main stage of oil generation.
Methodologies of Project Management
Wojciech Macek
Contemporary Economics , 2010,
Abstract: This paper presents comparison of three most popular project management standards belonging to a wider group of models (for example, PMBOK, Prince 2, CMMI, ISO 10006, BS 6079, IPMA Competence Baseline, European Commission Project Cycle Management Guidelines). The author discusses methods of project management according to PMBoK, Prince 2 and ISO 10006, some chosen criteria and fields of knowledge, such as general regulations of standards, project range management, resources management, and processes connected with risk, systems of project quality management.
Multifractality and intermittency in the solar wind
W. M. Macek
Nonlinear Processes in Geophysics (NPG) , 2007,
Abstract: Within the complex dynamics of the solar wind's fluctuating plasma parameters, there is a detectable, hidden order described by a chaotic strange attractor which has a multifractal structure. The multifractal spectrum has been investigated using Voyager (magnetic field) data in the outer heliosphere and using Helios (plasma) data in the inner heliosphere. We have also analyzed the spectrum for the solar wind attractor. The spectrum is found to be consistent with that for the multifractal measure of the self-similar one-scale weighted Cantor set with two parameters describing uniform compression and natural invariant probability measure of the attractor of the system. In order to further quantify the multifractality, we also consider a generalized weighted Cantor set with two different scales describing nonuniform compression. We investigate the resulting multifractal spectrum depending on two scaling parameters and one probability measure parameter, especially for asymmetric scaling. We hope that this generalized model will also be a useful tool for analysis of intermittent turbulence in space plasmas.
Order, Chaos and Quasi Symmetries in a First-Order Quantum Phase Transition
A. Leviatan,M. Macek
Physics , 2014, DOI: 10.1088/1742-6596/538/1/012012
Abstract: We study the competing order and chaos in a first-order quantum phase transition with a high barrier. The boson model Hamiltonian employed, interpolates between its U(5) (spherical) and SU(3) (deformed) limits. A classical analysis reveals regular (chaotic) dynamics at low (higher) energy in the spherical region, coexisting with a robustly regular dynamics in the deformed region. A quantum analysis discloses, amidst a complicated environment, persisting regular multiplets of states associated with partial U(5) and quasi SU(3) dynamical symmetries.
Regularity and chaos at critical points of first-order quantum phase transitions
M. Macek,A. Leviatan
Physics , 2011, DOI: 10.1103/PhysRevC.84.041302
Abstract: We study the interplay between regular and chaotic dynamics at the critical point of a generic first-order quantum phase transition in an interacting boson model of nuclei. A classical analysis reveals a distinct behavior of the coexisting phases in a broad energy range. The dynamics is completely regular in the deformed phase and, simultaneously, strongly chaotic in the spherical phase. A quantum analysis of the spectra separates the regular states from the irregular ones, assigns them to particular phases, and discloses persisting regular rotational bands in the deformed region.
Coexistence of order and chaos at critical points of first-order quantum phase transitions in nuclei
M. Macek,A. Leviatan
Physics , 2011,
Abstract: We study the interplay between ordered and chaotic dynamics at the critical point of a generic first-order quantum phase transition in the interacting boson model of nuclei. Classical and quantum analyses reveal a distinct behavior of the coexisting phases. While the dynamics in the deformed phase is robustly regular, the spherical phase shows strongly chaotic behavior in the same energy intervals. The effect of collective rotations on the dynamics is investigated.
Evolution of order and chaos across a first-order quantum phase transition
A. Leviatan,M. Macek
Physics , 2012, DOI: 10.1016/j.physletb.2012.06.046
Abstract: We study the evolution of the dynamics across a generic first order quantum phase transition in an interacting boson model of nuclei. The dynamics inside the phase coexistence region exhibits a very simple pattern. A classical analysis reveals a robustly regular dynamics confined to the deformed region and well separated from a chaotic dynamics ascribed to the spherical region. A quantum analysis discloses regular bands of states in the deformed region, which persist to energies well above the phase-separating barrier, in the face of a complicated environment. The impact of kinetic collective rotational terms on this intricate interplay of order and chaos is investigated.
Interplay of order and chaos across a first-order quantum shape-phase transition in nuclei
A. Leviatan,M. Macek
Physics , 2012, DOI: 10.1063/1.4764230
Abstract: We study the nature of the dynamics in a first-order quantum phase transition between spherical and prolate-deformed nuclear shapes. Classical and quantum analyses reveal a change in the system from a chaotic H\'enon-Heiles behavior on the spherical side into a pronounced regular dynamics on the deformed side. Both order and chaos persist in the coexistence region and their interplay reflects the Landau potential landscape and the impact of collective rotations.
Configuration interaction matrix elements for the quantum Hall effect
Rachel Wooten,Joseph Macek
Physics , 2014,
Abstract: We derive analytic expressions for the two-body matrix elements in finite spherical quantum Hall systems in terms of a general scalar interaction expressed as a sum over Legendre polynomials, and we derive the corresponding pair pseudopotentials from these matrix elements. The relationship between the effective spatial potential and the pseudopotential is one-to-one in this framework, and we show how any complete model pseudopotential can be analytically inverted to give a unique corresponding spatial potential. As an example, we find the spatial potential that produces a harmonic pseudopotential and verify that it fails to break the angular momentum degeneracy of the many-body quantum Hall system. We also include additional examples to demonstrate the use of the inversion technique.
Regular and chaotic classical dynamics in the U(5)-SU(3) quantum phase transition of the IBM
M. Macek,A. Leviatan
Physics , 2012, DOI: 10.1063/1.4759429
Abstract: We study the classical dynamics in a generic first-order quantum phase transition between the U(5) and SU(3) limits of the interacting boson model. The dynamics is chaotic, of H\'enon-Heiles type, in the spherical phase and is regular, yet sensitive to local degeneracies, in the deformed phase. Both types of dynamics persist in the coexistence region resulting in a divided phase space.
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