555 research outputs found
Pauli-Villars Regularization in nonperturbative Hamiltonian approach on the Light Front
The advantage of Pauli-Villars regularization in quantum field theory
quantized on the light front is explained. Simple examples of scalar
field theory and Yukawa-type model are used. We give also an
example of nonperturbative calculation in the theory with Pauli-Villars fields,
using for that a model of anharmonic oscillator modified by inclusion of ghost
variables playing the role similar to Pauli-Villars fields.Comment: LaTeX, 10 pages, 2 figures. Article will be published in AIP
Conference Proceedings, the final publication will be available at
http://scitation.aip.org/content/aip/proceeding/aipc
Production of exotic isotopes in complete fusion reactions with radioactive beams
The isotopic dependence of the complete fusion (capture) cross section is
analyzed in the reactions
Xe+Ca with stable and
radioactive beams. It is shown for the first time that the very neutron-rich
nuclei W can be reached with relatively large cross sections by
complete fusion reactions with radioactive ion beams at incident energies near
the Coulomb barrier. A comparison between the complete fusion and fragmentation
reactions for the production of neutron-rich W and neutron-deficient Rn
isotopes is performed.Comment: 13 pages, 6 figures, accepted in PR
Equilibrium and stability of non-linearly elastic bodies with cavities containing fluid
Boundary conditions are formulated on the surface of a cavity filled with a compressible fluid or gas for the equilibrium problem of an elastic body experiencing large deformations. A formulation is given of the stability problem for the equilibrium of a non-linearly elastic body with fluid inclusions. The stability problem is solved for a thick-walled closed spherical shell filled with gas and loaded by external pressure. © 1988
Diagrammatic method for theory of magnetic and resistive properties of manganites
Effective field theory of magnetic and resistive properties of manganites
with account of strong Hund exchange coupling and electron-phonon interactions
has been evolved under the strong Hund coupling condition. In parallel with
Lang-Firsov unitary transformation of the zeroth Hamiltonian, we have realized
the diagonalization of Hund's Hamiltonian neglecting the upper triplet. The
diagram techniques taking into account the quantum spin fluctuations of lower
quintet and hole state with spin S=3/2 was developed. The magnetic structure of
the ground state and an influence of electron-phonon interaction have been
analyzed using the first nonvanishing approximation of perturbation theory. The
calculated temperature dependence of resistivity agrees well with experimental
data including these obtained in applied magnetic field.Comment: 44 pages, 14 figure
Appealing the diagnosis of occupational disease (clinical and expert case).
The article presents a clinical and expert case of appealing the diagnosis of occupational disease. Purpose: to provide an example of substantiated answer to the court action concerning the appeal of the diagnosis of occupational disease. A medical history of a patient who worked as an electric welder suffering from chronic bronchitis is described. Data on regulatory documents, acting in accordance with the legislation of Ukraine are presented. The main controversial issues that arise when linking the disease to working conditions are studied
Appealing the diagnosis of occupational disease (clinical and expert case).
The article presents a clinical and expert case of appealing the diagnosis of occupational disease. Purpose: to provide an example of substantiated answer to the court action concerning the appeal of the diagnosis of occupational disease. A medical history of a patient who worked as an electric welder suffering from chronic bronchitis is described. Data on regulatory documents, acting in accordance with the legislation of Ukraine are presented. The main controversial issues that arise when linking the disease to working conditions are studied
Description of a new species of Chrysina Kirby, 1828 (Coleoptera: Scarabaeidae: Rutelinae) from resplendens group, based on morphological characters and mtDNA COX I molecular marker
A new species of the genus Chrysina Kirby, 1828 is decribed from Panama. Chrysina kalinini sp.n. is related to Chrysina resplendens (Boucard, 1875) in habitus, male genitalia morphology and mtDNA COX I molecular marker). The two closely related species differ in the shape of pronotum, mesosternal process and male genitalia. mtDNA COI molecular marker analysis gives a reliable distance for the compared species
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