167 research outputs found
Functional «cost» of technical and tactical activities in football
Objective: to study the objective and subjective parameters of the functional “cost” of technical and tactical activities (TRIMP, standard units, RPE, score) and compare them with the expert assessment of technical and tactical readiness of young professional football players (EXPERT, score). Materials and methods: 30 students of the professional football academy (mean age 16.4±1.2 years) were tested with Polar Team Pro sports technology from Polar (Finland). The professional football coaches (n=6, license A-C) after each official game scored (from 1-10).an expert assessment of the implementation of the players technical and tactical readiness. Results: a linear relationship between the physiological indicator “training impulse” (TRIMP) and the expert assessment of coaches of technical and tactical readiness were found. Were revealed that RPE subjective information from athletes-players is a convenient express method of receiving feedback, but it does not demonstrate a high correlation with technical and tactical readiness. The variance analysis found a decrease in functional costs in official matches relative to training sessions. Conclusion: the combined monitoring of subjective (RPE) and objective (TRIMP) parameters of functional “cost” is the most effective in practice
Special features of the Be2He fragmentation in emulsion at an energy of 1.2~A~GeV
The results of investigations of the relativistic Be nucleus
fragmentation in emulsion which entails the production of two He fragments of
an energy of 1.2~A~GeV are presented. The results of the angular measurements
of the Be2He events are analyzed.
The BeBe+n fragmentation channel involving the Be decay from
the ground (0) and the first excited (2) states to two
particles is observed to be predominant.Comment: 10 pages, 6 figures, conference: Conference on Physics of Fundamental
Interactions, Moscow, Russia, 5-9 Dec 2005 (Author's translation
Fragmentation of relativistic nuclei in peripheral interactions in nuclear track emulsion
The technique of nuclear track emulsions is used to explore the fragmentation
of light relativistic nuclei down to the most peripheral interactions - nuclear
"white" stars. A complete pattern of therelativistic dissociation of a B
nucleus with target fragment accompaniment is presented. Relativistic
dissociation Be is explored using significant statistics and
a relative contribution of Be decays from 0 and 2 states is
established. Target fragment accompaniments are shown for relativistic
fragmentation N3He+H and Ne5He. The leading role of the
electromagnetic dissociation on heavy nuclei with respect to break-ups on
target protons is demonstrated in all these cases. It is possible to conclude
that the peripheral dissociation of relativistic nuclei in nuclear track
emulsion is a unique tool to study many-body systems composed of lightest
nuclei and nucleons in the energy scale relevant for nuclear astrophysics.Comment: 15 pages, 4 figures, 4 tables, conference: Relativistic nuclear
physics: from Nuclotron to LHC energies, Kiev, June 18-22, 200
Experience in creating artificial forest plants in the territory of Belgorod Region
The experience of creating artificial forest plantations on the territory of the Belgorod region within the framework of the "Green Capital" project is considered. As part of the project, it was envisaged to create more than 100 thousand hectares of forest plantations on chalk slopes and erosion-hazardous areas of the region for 2010 - 2020, that is, bringing the forest cover of the region to 15% - the optimal value for the regio
Clustering in light nuclei in fragmentation above 1 A GeV
The relativistic invariant approach is applied to analyzing the 3.3 A GeV
Ne fragmentation in a nuclear track emulsion. New results on few-body
dissociations have been obtained from the emulsion exposures to 2.1 A GeV
N and 1.2 A GeV Be nuclei. It can be asserted that the use of the
invariant approach is an effective means of obtaining conclusions about the
behavior of systems involving a few He nuclei at a relative energy close to 1
MeV per nucleon. The first observations of fragmentation of 1.2 A GeV B
and C nuclei in emulsion are described. The presented results allow one
to justify the development of few-body aspects of nuclear astrophysics.Comment: 7 pages, 8 figures, 3 tables, Nuclear Physics in Astrophysics-2,
16-20 May, 2005 (ATOMKI), Debrecen, Hungar
Electromagnetic dissociation of relativistic B nuclei in nuclear track emulsion
Experimental data on fragmentation channels in peripheral interactions of
B nuclei in nuclear track emulsions are presented. A detailed analysis made
it possible to justify selections of events of the electromagnetic-dissociation
process B Be + \emph{p} and to estimate its cross section. Events of
C peripheral dissociation that were observed in the same exposure are
described.Comment: 12 pages, 10 figures, 4 tables, Published in
Phys.Atom.Nucl.72:690-701,200
Exposure of Nuclear Track Emulsion to a Mixed Beam of Relativistic N, C, and Be Nuclei
A nuclear track emulsion was exposed to a mixed beam of relativistic
N, C, and Be nuclei having a momentum of 2 GeV/ per
nucleon. The beam was formed upon charge exchange processes involving C
primary nuclei and their fragmentation. An analysis indicates that C
nuclei are dominant in the beam and that N nuclei are present in it. The
charge topology of relativistic fragments in the coherent dissociation of these
nuclei is presented.Comment: ISSN 1063-7788, Pleiades Publishing, Ltd., 201
First results on the interactions of relativistic C nuclei in nuclear track emulsion
\indent First results of the exposure of nuclear track emulsions in a
secondary beam enriched by C nuclei at energy of 1.2 A GeV are described.
The presented statistics corresponds to the most peripheral C interactions.
For the first time a dissociation C He not accompanied by target
fragments and mesons is identified.\parComment: 7 pages, 6 figures, 2 tables, Presented at Advanced Studies Institute
(ASI), SPIN-Praha-2008, Prague, July 20 - July 26, 2008. To be published in
in The European Physical Journal Special Topics (EJP ST) Serie
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