156 research outputs found
Block Models of Lithosphere Dynamics and Seismicity
The necessity of catastrophe modeling is stipulated both by the essential increase of losses due to recent natural and anthropogenic hazards and by a lack of reliable real observation data. This paper focuses on risks of earthquakes. The region of Italy is considered as an example. A brief overview of different approaches in mathematical modeling of the lithosphere dynamics is presented. A model of the block structure dynamics and seismicity is described in detail and used for the analysis of the Vrancea (Romania) seismoactive region. The corresponding synthetic earthquake catalog is viewed as a basis for a possible generator of catastrophic events for estimating the seismic risks in the region
Regularized extremal shift in problems of stable control
We discuss a technical approach, based on the method of regularized extremal shift (RES), intended to help solve problems of stable control of uncertain dynamical systems. Our goal is to demonstrate the essence and abilities of the RES technique; for this purpose we construct feedback controller for approximate tracking a prescribed trajectory of an inaccurately observed system described by a parabolic equation. The controller is "resource-saving" in a sense that control resource spent for approximate tracking do not exceed those needed for tracking in an "ideal" situation where the current values of the input disturbance are fully observable. Β© 2013 IFIP International Federation for Information Processing.German Sci. Found. (DFG) Eur. Sci. Found. (ESF);Natl. Inst. Res. Comput. Sci. Control France (INRIA);DFG Research Center MATHEON;Weierstrass Institute for Applied Analysis and Stochastics (WIAS);European Patent Offic
Magnetic-field and current-density distributions in thin-film superconducting rings and disks
We show how to calculate the magnetic-field and sheet-current distributions
for a thin-film superconducting annular ring (inner radius a, outer radius b,
and thickness d<<a) when either the penetration depth obeys lambda < d/2 or, if
lambda > d/2, the two-dimensional screening length obeys Lambda = 2 lambda^2/d
<< a for the following cases: (a) magnetic flux trapped in the hole in the
absence of an applied magnetic field, (b) zero magnetic flux in the hole when
the ring is subjected to an applied magnetic field, and (c) focusing of
magnetic flux into the hole when a magnetic field is applied but no net current
flows around the ring. We use a similar method to calculate the magnetic-field
and sheet-current distributions and magnetization loops for a thin,
bulk-pinning-free superconducting disk (radius b) containing a dome of magnetic
flux of radius a when flux entry is impeded by a geometrical barrier.Comment: 10 pages, 13 figure
Field-Dependent Critical Current in Type-II Superconducting Strips: Combined Effect of Bulk Pinning and Geometrical Edge Barrier
Recent theoretical and experimental research on low-bulk-pinning
superconducting strips has revealed striking dome-like magnetic-field
distributions due to geometrical edge barriers. The observed magnetic-flux
profiles differ strongly from those in strips in which bulk pinning is
dominant. In this paper we theoretically describe the current and field
distributions of a superconducting strip under the combined influence of both a
geometrical edge barrier and bulk pinning at the strip's critical current Ic,
where a longitudinal voltage first appears. We calculate Ic and find its
dependence upon a perpendicular applied magnetic field Ha. The behavior is
governed by a parameter p, defined as the ratio of the bulk-pinning critical
current Ip to the geometrical-barrier critical current Is0. We find that when p
> 2/pi and Ip is field-independent, Ic vs Ha exhibits a plateau for small Ha,
followed by the dependence Ic-Ip ~ 1/Ha in higher magnetic fields.Comment: 4 pages, 2 figures, Fig. 1 revised, submitted to Phys. Rev.
Developing of modern cultivation technology of organic potatoes
Medium term field experiment demonstrates the effectiveness of biological ways to
increase potatoes yield on the sod-podzolic, light loamy soil.
The effects of the following two groups of factors were studied:
1. The level of mineral nutrition provided by compost;
2. Microbiological pant protection product (bio preparations): Flavobacterin which has
N fixer attribute and Vitaplan and Kartofen, which have bio fungicide features.
Potatoes varieties βNevskyβ and βUdachaβ were cultivated. The compost was applied in the dose
range from 0 to 160 kg N ha-1
. Treatment with bio-preparations was carried out by potato tubers
during planting and leaves during the growing season. Weeds were removed mechanically.
Weather conditions had a significant impact on the formation of the crop. The average yield of
standard potato tubers for 2017β2018 ranged from 14.1 to 29.3 t ha-1
. The use of both
microbiological preparations and compost gave approximately the same effect and increased
yields by 35β37% compared to the control. The use of compost together with bio-preparations
provided an output of 27.6β29.3 t ha-1of potatoes. In 2019, the joint use of compost and biopreparations allowed to reach a yield of 40 tons ha-1 of marketable potatoes. On the basis of the
obtained data, the mathematical dependences of the yield of potatoes on the dose of compost, the
type of biological preparation and the complex indicator of the year conditions were determined
Π ΠΠΠ¬ ΠΠΠΠ Ξ±2Ξ²-ΠΠΠ ΠΠΠΠ ΠΠ¦ΠΠΠ’ΠΠ Π Π Π ΠΠΠΠΠ’ΠΠ ΠΠΠ Π£Π¨ΠΠΠΠ ΠΠΠ£Π’Π ΠΠΠΠΠ£ΠΠΠ§ΠΠΠΠΠ ΠΠ ΠΠΠΠΠΠΠΠ‘Π’Π
Background: The purpose of this study was to investigate association between the genetic polymorphism I/D of gene Ξ±2Ξ²-adrenoreceptor (ADRA2B) and hereditary disorders of ventricular conduction. Patients and methods: In this study, 102 people with complete left bundle branch block (45,71Β±1,852 years) β 46 females and 56 males, and 86 people with complete right bundle branch block (34,59Β±1,86 years) β 41 females and 45 males. The study was approved by Ethic Committee of the KrasSMU. All participants were included in the study after written informed consent form. Cardiological examination included clinical examination, electrocardiography, echocardiography, Holter monitoring, stresstest, koronaroangiografy and radionuclide method of a myocardium and molecular and genetic researches. Results: Statistically, significant prevalence of a homozygous genotype of DD on rare allele gene ADRA2B in both groups in comparison with group of control is established. The reliable dominance of the homozygous rare genotypes (D allele) of gene ADRA2B were detected in all groups. Conclusion: Polymorphism DD of a gene ADRA2B is a genetic predictor of predisposition to the blockade of the right and left bundle branch block.Π¦Π΅Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ: ΠΈΠ·ΡΡΠΈΡΡ Π°ΡΡΠΎΡΠΈΠ°ΡΠΈΡ I/D-ΠΏΠΎΠ»ΠΈΠΌΠΎΡΡΠΈΠ·ΠΌΠ° Π³Π΅Π½Π° Ξ±2Ξ²-Π°Π΄ΡΠ΅Π½ΠΎΡΠ΅ΡΠ΅ΠΏΡΠΎΡΠ° (ADRA2B) Ρ ΠΏΠ΅ΡΠ²ΠΈΡΠ½ΡΠΌΠΈ Π½Π°ΡΡΡΠ΅Π½ΠΈΡΠΌΠΈΠ²Π½ΡΡΡΠΈΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠΎΠ²ΠΎΠΉ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ. ΠΠ°ΡΠΈΠ΅Π½ΡΡ ΠΈ ΠΌΠ΅ΡΠΎΠ΄Ρ: Π² ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π±ΡΠ»ΠΈ Π²ΠΊΠ»ΡΡΠ΅Π½Ρ Π»ΠΈΡΠ° Ρ Π½Π°ΡΠ»Π΅Π΄ΡΡΠ²Π΅Π½Π½ΡΠΌΠΈ Π½Π°ΡΡΡΠ΅Π½ΠΈΡΠΌΠΈ Π²Π½ΡΡΡΠΈΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠΎΠ²ΠΎΠΉ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ. ΠΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ 102 ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ ΠΏΠΎ Π»Π΅Π²ΠΎΠΉ Π½ΠΎΠΆΠΊΠ΅ ΠΏΡΡΠΊΠ° ΠΠΈΡΠ° (45,71Β±1,85 Π»Π΅Ρ; 46 ΠΆΠ΅Π½ΡΠΈΠ½ ΠΈ 56 ΠΌΡΠΆΡΠΈΠ½) ΠΈ 86 β Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ ΠΏΠΎ ΠΏΡΠ°Π²ΠΎΠΉ Π½ΠΎΠΆΠΊΠ΅ ΠΏΡΡΠΊΠ° ΠΠΈΡΠ° (34,59Β±1,86 Π»Π΅Ρ; 41 ΠΆΠ΅Π½ΡΠΈΠ½Π° ΠΈ 45 ΠΌΡΠΆΡΠΈΠ½). ΠΠ°ΡΡΠ½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΎΠ΄ΠΎΠ±ΡΠ΅Π½ΠΎ ΠΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΊΠΎΠΌΠΈΡΠ΅ΡΠΎΠΌ ΠΡΠ°ΡΠΠΠ£. ΠΡΠ΅ΠΌ ΠΎΠ±ΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΠΌ Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΡΠΌΠΈ ΡΠ΅ΡΠ΄Π΅ΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ Π±ΡΠ»ΠΎ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΠΊΠ»ΠΈΠ½ΠΈΠΊΠΎ-ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠΎ ΡΠ»Π΅Π΄ΡΡΡΠ΅ΠΉ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ΅: ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΎΡΠΌΠΎΡΡ, ΡΠ»Π΅ΠΊΡΡΠΎ- ΠΈ ΡΡ
ΠΎΠΊΠ°ΡΠ΄ΠΈΠΎΠ³ΡΠ°ΡΠΈΡ, Ρ
ΠΎΠ»ΡΠ΅ΡΠΎΠ²ΡΠΊΠΎΠ΅ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅, Π²Π΅Π»ΠΎΡΡΠ³ΠΎΠΌΠ΅ΡΡΠΈΡ, ΠΊΠΎΡΠΎΠ½Π°ΡΠΎΠ°Π½Π³ΠΈΠΎΠ³ΡΠ°ΡΠΈΡ ΠΈ ΡΡΠΈΠ½ΡΠΈΠ³ΡΠ°ΡΠΈΡ ΠΌΠΈΠΎΠΊΠ°ΡΠ΄Π°, ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎ-Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ: ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈ Π·Π½Π°ΡΠΈΠΌΠΎΠ΅ ΠΏΡΠ΅ΠΎΠ±Π»Π°Π΄Π°Π½ΠΈΠ΅ Π³ΠΎΠΌΠΎΠ·ΠΈΠ³ΠΎΡΠ½ΠΎΠ³ΠΎ Π³Π΅Π½ΠΎΡΠΈΠΏΠ° DD ΠΏΠΎ ΡΠ΅Π΄ΠΊΠΎΠΌΡ Π°Π»Π»Π΅Π»Ρ Π³Π΅Π½Π° ADRA2B Π² ΠΎΠ±Π΅ΠΈΡ
Π³ΡΡΠΏΠΏΠ°Ρ
ΠΏΠΎ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ Ρ Π³ΡΡΠΏΠΏΠΎΠΉ ΠΊΠΎΠ½ΡΡΠΎΠ»Ρ. ΠΡΠ²ΠΎΠ΄Ρ: ΠΏΠΎΠ»ΠΈΠΌΠΎΡΡΠΈΠ·ΠΌ DD Π³Π΅Π½Π° ADRA2B ΡΠ²Π»ΡΠ΅ΡΡΡ Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΏΡΠ΅Π΄ΠΈΠΊΡΠΎΡΠΎΠΌ ΠΏΡΠ΅Π΄ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½Π½ΠΎΡΡΠΈ ΠΊ Π²ΠΎΠ·Π½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΡ ΠΏΠΎΠ»Π½ΠΎΠΉ Π±Π»ΠΎΠΊΠ°Π΄Ρ ΠΏΡΠ°Π²ΠΎΠΉ ΠΈ Π»Π΅Π²ΠΎΠΉ Π½ΠΎΠΆΠΊΠΈ ΠΏΡΡΠΊΠ° ΠΠΈΡΠ°
Theory for the coupling between longitudinal phonons and intrinsic Josephson oscillations in layered superconductors
In this publication a microscopic theory for the coupling of intrinsic
Josephson oscillations in layered superconductors with longitudinal
c-axis-phonons is developed. It is shown that the influence of lattice
vibrations on the c-axis transport can be fully described by introducing an
effective longitudinal dielectric function. Resonances in the
I-V-characteristic appear at van Hove singularities of both acoustical and
optical longitudinal phonon branches. This provides a natural explanation of
the recently discovered subgap structures in the I-V-characteristic of highly
anisotropic cuprate superconductors. The effect of the phonon dispersion on the
damping of these resonances and the coupling of Josephson oscillations in
different resistive junctions due to phonons are discussed in detail.Comment: submitted to Phys. Rev. B, corrections following referee repor
Measurement of and between 3.12 and 3.72 GeV at the KEDR detector
Using the KEDR detector at the VEPP-4M collider, we have measured
the values of and at seven points of the center-of-mass
energy between 3.12 and 3.72 GeV. The total achieved accuracy is about or
better than at most of energy points with a systematic uncertainty of
about . At the moment it is the most accurate measurement of in
this energy range
Study of KS KL Coupled Decays and KL -Be Interactions with the CMD-2 Detector at VEPP-2M Collider
The integrated luminosity about 4000 inverse nanobarn of around phi meson
mass ( 5 millions of phi mesons) has been collected with the CMD-2 detector at
the VEPP-2M collider. A latest analysis of the KS KL coupled decays based on 30
% of available data is presented in this paper.
The KS KL pairs from phi meson decays were reconstructed in the drift chamber
when both kaons decayed into two charged particles. From a sample of 1423
coupled decays a selection of candidates to the CP violating KL into pi+ pi-
decay was performed. CP violating decays were not identified because of the
domination of events with a KL regenerating at the Be beam pipe into KS and a
background from KL semileptonic decays.
The regeneration cross section of 110 MeV/c KL mesons was found to be 53 +-
17 mb in agreement with theoretical expectations. The angular distribution of
KS mesons after regeneration and the total cross section of KL for Be have been
measured.Comment: 14 pages, 8 figure
Multiband model for tunneling in MgB2 junctions
A theoretical model for quasiparticle and Josephson tunneling in multiband
superconductors is developed and applied to MgB2-based junctions. The gap
functions in different bands in MgB2 are obtained from an extended Eliashberg
formalism, using the results of band structure calculations. The temperature
and angle dependencies of MgB2 tunneling spectra and the Josephson critical
current are calculated. The conditions for observing one or two gaps are given.
We argue that the model may help to settle the current debate concerning
two-band superconductivity in MgB2.Comment: minor corrections, published in Phys. Rev. B 65, 180517(R) (2002
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