309 research outputs found
Forty Years Without Luria With Luria
The article compares five Luria International Memorial Congresses in Russia and some Luria Memorial Conferences abroad to prove the intensive and extensive development of Lurian approach. Such a development was assured by Lurian international school of psychologists (his colleagues, disciples and followers) who work or worked in different branches of psychology. The Lurian approach or Lurianism is defined as a combination of systemic and cultural-historical approaches. The specific Lurian approach in neuropsychology is determined by its subjects’ orientation. It means, that the Lurian neuropsychological analysis is not centered on a disease (its symptoms and severity, functional and cognitive disturbances), but on a subject: his personalexperience, health concepts, coping strategies and attitudes, social interactions and so on. Lurian neuropsychology is a ‘unified theory of cerebral and mental functions’. It explains why Lurianism still rests a source for development of both fundamental and applied psychology.
Keywords: Luria International Memorial Congresses, Lurianism, systemic and cultural– historical approache
Actualization of Potential Life Experience in Normal Aging
The paper search mechanisms for maintaining personality well-being at the stage of late ontogenesis, which is important for neuropsychology, gerontology and psychology. The authors analyze the preserved cognitive resource, acquired at the previous age stages, as a resource for life experience mobilization and providing adefinite level of intellectual and mental indicators in normal aging. The experience proves that preserved self-regulating abilities in elderly are the main condition of actualizing life experience potential. Specially organized environment in thematic art-groups providing the process of goal-oriented activity and adequate interpersonalinteraction is viewed as a determining factor of life experience implementation. The dynamics of viability components reflecting sustainable strategies of self-regulation is investigated and the results of this investigation are presented.
Keywords: potential life experience, normal aging, viability, cognitive resource
Effective chiral restoration in the rho'-meson in lattice QCD
In simulations with dynamical quarks it has been established that the ground
state rho in the infrared is a strong mixture of the two chiral representations
(0,1)+(1,0) and (1/2,1/2)_b. Its angular momentum content is approximately the
3S1 partial wave which is consistent with the quark model. Effective chiral
restoration in an excited rho-meson would require that in the infrared this
meson couples predominantly to one of the two representations. The variational
method allows one to study the mixing of interpolators with different chiral
transformation properties in the non-perturbatively determined excited state at
different resolution scales. We present results for the first excited state of
the rho-meson using simulations with n_f=2 dynamical quarks. We point out, that
in the infrared a leading contribution to rho'= rho(1450) comes from
(1/2,1/2)_b, in contrast to the rho. Its approximate chiral partner would be a
h_1(1380) state. The rho' wave function contains a significant contribution of
the 3D1 wave which is not consistent with the quark model prediction.Comment: 4 pp, a few short remarks have been added, a reference updated. To
appear in PR
Chiral symmetry restoration in excited hadrons, quantum fluctuations, and quasiclassics
In this paper, we discuss the transition to the semiclassical regime in
excited hadrons, and consequently, the restoration of chiral symmetry for these
states. We use a generalised Nambu-Jona-Lasinio model with the interaction
between quarks in the form of the instantaneous Lorentz-vector confining
potential. This model is known to provide spontaneous breaking of chiral
symmetry in the vacuum via the standard selfenergy loops for valence quarks. It
has been shown recently that the effective single-quark potential is of the
Lorentz-scalar nature, for the low-lying hadrons, while, for the high-lying
states, it becomes a pure Lorentz vector and hence the model exhibits the
restoration of chiral symmetry. We demonstrate explicitly the quantum nature of
chiral symmetry breaking, the absence of chiral symmetry breaking in the
classical limit as well as the transition to the semiclassical regime for
excited states, where the effect of chiral symmetry breaking becomes only a
small correction to the classical contributions.Comment: RevTeX4, 20 pages, 4 Postscript figures, uses epsfig.sty, typos
correcte
Chiral symmetry and excited baryons
An approach to baryons in the framework of the microscopic Generalized
Nambu-Jona-Lasinio chiral potential quark model is considered and quite general
arguments are given in favor of effective restoration of chiral symmetry in
excited baryons.Comment: LaTeX2e, 5 pages, uses jetpl.cls (included), to appear in JETP Let
NN interaction in a Goldstone boson exchange model
Adiabatic nucleon-nucleon potentials are calculated in a six-quark
nonrelativistic chiral constituent quark model where the Hamiltonian contains a
linear confinement and a pseudoscalar meson (Goldstone boson) exchange
interaction between quarks. Calculations are performed both in a cluster model
and a molecular orbital basis, through coupled channels. In both cases the
potentials present an important hard core at short distances, explained through
the dominance of the [51]_{FS} configuration, but do not exhibit an attractive
pocket. We add a scalar meson exchange interaction and show how it can account
for some middle-range attraction.Comment: 32 pages with 12 eps figures incorporated, RevTeX. Final version
published in PR
Lurian neuropsychological assessment at an early age
The paper discusses the theoretical foundations and methods of neuropsychological assessment of 2–6.year.old preschool children and describes the potential and advantages of Luria’s battery for revealing child underdevelopment or abnormal development
Unified description of light- and strange-baryon spectra
We present a chiral constituent quark model for light and strange baryons
providing a unified description of their ground states and excitation spectra.
The model relies on constituent quarks and Goldstone bosons arising as
effective degrees of freedom of low-energy QCD from the spontaneous breaking of
chiral symmetry. The spectra of the three-quark systems are obtained from a
precise variational solution of the Schr\"odinger equation with a
semirelativistic Hamiltonian. The theoretical predictions are found in close
agreement with experiment.Comment: 9 pages, including 2 figure
Short--range impurity in the vicinity of a saddle point and the levitation of the 2D delocalized states in a magnetic field
The effect of a short--range impurity on the transmission through a
saddle--point potential for an electron, moving in a strong magnetic field, is
studied. It is demonstrated that for a random position of an impurity and
random sign of its potential the impurity--induced mixing of the Landau levels
diminishes {\em on average} the transmission coefficient. This results in an
upward shift (levitation) of the energy position of the delocalized state in a
smooth potential. The magnitude of the shift is estimated. It increases with
decreasing magnetic field as .Comment: LaTeX, 20 page
Critique of a Pion Exchange Model for Interquark Forces
I describe four serious defects of a widely discussed pion exchange model for
interquark forces: it doesn't solve the "spin-orbit problem" as advertised, it
fails to describe the internal structure of baryon resonances, it leads to
disastrous conclusions when extended to mesons, and it is not reasonably
connected to the physics of heavy-light systems.Comment: 20 pages, 6 figures; some clarifications and references adde
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