297 research outputs found
Activization business activities through the development of competence-based approach
This study reviews the theory of systems thinking (ST&T) as an important element of
human resource development (HRD). The gap between theory and practice ST&T are
analyzed. This study recommends that a competence-based approach in the curriculum.
Recommendations for updating the system and creative thinking for HRD research and
practices are offered.Це дослідження розглядає теорію системного мислення (ST&T) як важливого напряму
розвитку людських ресурсів (HRD). Проаналізовано розрив між теорією і практикою
ST&T. Дане дослідження рекомендує включити компетентнісний підхід в навчальні програми. Пропонуються рекомендації про те, як системне і креативне мислення може стати більш актуальним для HRD досліджень і практик.Это исследование рассматривает теорию системного мышления (ST&T) как важное
направление развития человеческих ресурсов (HRD). Проанализирован разрыв между
теорией и практикой ST&T. Данное исследование рекомендует включить компетентностный подход в учебные программы. Предлагаются рекомендации по актуализации
системного и креативного мышления для HRD исследований и практик
Casimir energy of a non-uniform string
The Casimir energy of a non-uniform string built up from two pieces with
different speed of sound is calculated. A standard procedure of subtracting the
energy of an infinite uniform string is applied, the subtraction being
interpreted as the renormalization of the string tension. It is shown that in
the case of a homogeneous string this method is completely equivalent to the
zeta renormalization.Comment: 11 pages, REVTeX, no figures and table
Verbal ways and means of manipulative effect in the discourse of the Republicans about the Russian-Ukrainian war
STIRAP transport of Bose-Einstein condensate in triple-well trap
The irreversible transport of multi-component Bose-Einstein condensate (BEC)
is investigated within the Stimulated Adiabatic Raman Passage (STIRAP) scheme.
A general formalism for a single BEC in M-well trap is derived and analogy
between multi-photon and tunneling processes is demonstrated. STIRAP transport
of BEC in a cyclic triple-well trap is explored for various values of detuning
and interaction between BEC atoms. It is shown that STIRAP provides a complete
population transfer at zero detuning and interaction and persists at their
modest values. The detuning is found not to be obligatory. The possibility of
non-adiabatic transport with intuitive order of couplings is demonstrated.
Evolution of the condensate phases and generation of dynamical and geometric
phases are inspected. It is shown that STIRAP allows to generate the
unconventional geometrical phase which is now of a keen interest in quantum
computing.Comment: 9 pages, 6 figures. To be published in Laser Physics (v. 19, n.4,
2009
Low-energy M1 states in deformed nuclei: spin-scissors or spin-flip?
The low-energy states in deformed Dy and spherical Ni are
explored in the framework of fully self-consistent Quasiparticle Random-Phase
Approximation (QRPA) with various Skyrme forces. The main attention is paid to
orbital and spin excitations. The obtained results are compared with the
prediction of the low-energy {\it spin-scissors} resonance suggested
within Wigner Function Moments (WFM) approach. A possible relation of this
resonance to low-energy spin-flip excitations is analyzed. In connection with
recent WFM studies, we consider evolution of the low-energy spin-flip states in
Dy with deformation (from the equilibrium value to the spherical
limit). The effect of tensor forces is briefly discussed. It is shown that two
groups of states observed at 2.4-4 MeV in Dy are rather explained
by fragmentation of the orbital strength than by the occurrence of the
collective spin-scissors resonance. In general, our calculations do not confirm
the existence of this resonance.Comment: 7 pages, 7 figures, submitted to Physics of Atomic Nuclei. arXiv
admin note: text overlap with arXiv:2102.13580. As compared with the previous
version, Ref. [1] was removed, Ref [33] was replaced, description of Fig. 3
was modifie
Two-Photon Excitation of Low-Lying Electronic Quadrupole States in Atomic Clusters
A simple scheme of population and detection of low-lying electronic
quadrupole modes in free small deformed metal clusters is proposed. The scheme
is analyzed in terms of the TDLDA (time-dependent local density approximation)
calculations. As test case, the deformed cluster is considered.
Long-living quadrupole oscillations are generated via resonant two-photon
(two-dipole) excitation and then detected through the appearance of satellites
in the photoelectron spectra generated by a probe pulse. Femtosecond pump and
probe pulses with intensities and
pulse duration fs are found to be optimal. The modes of
interest are dominated by a single electron-hole pair and so their energies,
being combined with the photoelectron data for hole states, allow to gather new
information about mean-field spectra of valence electrons in the HOMO-LUMO
region. Besides, the scheme allows to estimate the lifetime of electron-hole
pairs and hence the relaxation time of electronic energy into ionic heat.Comment: 4 pages, 4 figure
The Adiabatic Transport of Bose-Einstein Condensates in a Double-Well Trap: Case a Small Nonlinearity
A complete adiabatic transport of Bose-Einstein condensate in a double-well
trap is investigated within the Landau-Zener (LZ) and Gaussian Landau-Zener
(GLZ) schemes for the case of a small nonlinearity, when the atomic interaction
is weaker than the coupling. The schemes use the constant (LZ) and
time-dependent Gaussian (GLZ) couplings. The mean field calculations show that
LZ and GLZ suggest essentially different transport dynamics. Significant
deviations from the case of a strong coupling are discussed.Comment: 6 pages, 3 figures, to be published in Laser Physic
Casimir energy of a compact cylinder under the condition
The Casimir energy of an infinite compact cylinder placed in a uniform
unbounded medium is investigated under the continuity condition for the light
velocity when crossing the interface. As a characteristic parameter in the
problem the ratio is used, where and
are, respectively, the permittivity and permeability of the material
making up the cylinder and and are those for the
surrounding medium. It is shown that the expansion of the Casimir energy in
powers of this parameter begins with the term proportional to . The
explicit formulas permitting us to find numerically the Casimir energy for any
fixed value of are obtained. Unlike a compact ball with the same
properties of the materials, the Casimir forces in the problem under
consideration are attractive. The implication of the calculated Casimir energy
in the flux tube model of confinement is briefly discussed.Comment: REVTeX, 12 pages, 1 figure in a separate fig1.eps file, 1 table;
minor corrections in English and misprints; version to be published in Phys.
Rev. D1
A nonperturbative model for the strong running coupling within potential approach
A nonperturbative model for the QCD invariant charge, which contains no
low-energy unphysical singularities and possesses an elevated higher loop
corrections stability, is developed in the framework of potential approach. The
static quark-antiquark potential is constructed by making use of the proposed
model for the strong running coupling. The obtained result coincides with the
perturbative potential at small distances and agrees with relevant lattice
simulation data in the nonperturbative physically-relevant region. The
developed model yields a reasonable value of the QCD scale parameter, which is
consistent with its previous estimations obtained within potential approach.Comment: 14 pages, 4 figure
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