3,684 research outputs found
Electron-based crystalline undulator
We discuss the features of a crystalline undulator of the novel type based on
the effect of a planar channeling of ultra-relativistic electrons in a
periodically bent crystals. It is demonstrated that an electron-based undulator
is feasible in the tens of GeV range of the beam energies, which is noticeably
higher than the energy interval allowed in a positron-based undulator.
Numerical analysis of the main parameters of the undulator as well as the
characteristics of the emitted undulator radiation is carried out for 20 and 50
GeV electrons channeling in diamond and silicon crystals along the (111)
crystallographic planes.Comment: 16 pages, 8 figures, Latex, IOP styl
Coherent radiation of an ultra-relativistic charged particle channeled in a periodically bent crystal
We suggest a new type of the undulator radiation which is generated by an
ultra-relativistic particle channeled along a periodically bent
crystallographic plane or axis. The electromagnetic radiation arises mainly due
to the bending of the particle's trajectory, which follows the shape of the
channel. The parameters of this undulator, which totally define the spectrum
and the angular distribution of the radiation (both spontaneous and
stimulated), depend on the type of the crystal and the crystallographic plane
(axis), on the type of a projectile and its energy, and on the shape of the
bent channel, and, thus, can be varied significantly by varying these
characteristics.
As an example, we consider the acoustically induced radiation (AIR) which is
generated by ultra-relativistic particles channeled in a crystal which is bent
by a transverse acoustic wave. The AIR mechanism allows to make the undulator
with the main parameters varying in wide ranges, which are inaccessible in the
undulators based on the motion of particles in the periodic magnetic fields and
also in the field of the laser radiation. The intensity of AIR can be easily
made larger than the intensity of the radiation in a linear crystal and can be
varied in a wide range by varying the frequency and the amplitude of the
acoustic wave in the crystal. A possibility to generate stimulated emission of
high-energy photons (in keV - MeV region) is also discussed.Comment: published in J. Phys. G: Nucl. Part. Phys. 24 (1998) L45-L53,
http://www.iop.or
ΠΠ°Π·Π²Π°Π½ΠΈΡ ΠΌΠΎΡΡΠΊΠΈΡ ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΠΊΠΈΡ Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠ΅ΠΉ, ΠΏΡΠ΅Π΄ΡΠΏΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠΉ ΠΈ ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Π² ΡΠΊΡΠ°ΠΈΠ½ΡΠΊΠΎΠΌ ΡΠ·ΡΠΊΠ΅
Π‘ΡΠ°ΡΡΡ ΠΏΡΠΎΠ΄ΠΎΠ²ΠΆΡΡ Π½ΠΈΠ·ΠΊΡ ΠΏΡΠ±Π»ΡΠΊΠ°ΡΡΠΉ Π°Π²ΡΠΎΡΠ°, ΠΏΡΠΈΡΠ²ΡΡΠ΅Π½ΠΈΡ
Π²ΠΈΠ²ΡΠ΅Π½Π½Ρ ΡΡΡΠ°ΡΠ½ΠΎΡ ΡΠΊΡΠ°ΡΠ½ΡΡΠΊΠΎΡ Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΎ-Π³ΡΠ΄ΡΠΎΠ³ΡΠ°ΡΡΡΠ½ΠΎΡ ΡΠ΅ΡΠΌΡΠ½ΠΎΠ»ΠΎΠ³ΡΡ. Π£ ΡΡΠ°ΡΡΡ ΠΏΡΠΎΠ°Π½Π°Π»ΡΠ·ΠΎΠ²Π°Π½ΠΎ ΡΠ΅ΠΌΠ°ΡΠΈΡΠ½Ρ Π³ΡΡΠΏΠΈ ΡΠΊΡΠ°ΡΠ½ΡΡΠΊΠΎΡ Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΎ-Π³ΡΠ΄ΡΠΎΠ³ΡΠ°ΡΡΡΠ½ΠΎΡ Π»Π΅ΠΊΡΠΈΠΊΠΈ Π½Π° ΠΏΠΎΠ·Π½Π°ΡΠ΅Π½Π½Ρ ΠΌΠΎΡΡΡΠΊΠΈΡ
ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΡΠΊΠΈΡ
Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΈΡ
Π½Π΅Π±Π΅Π·ΠΏΠ΅ΠΊ, ΠΌΠΎΡΡΡΠΊΠΈΡ
Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΈΡ
ΠΏΠΎΠΏΠ΅ΡΠ΅Π΄ΠΆΠ΅Π½Ρ Ρ ΡΠΈΠ³Π½Π°Π»ΡΠ², ΠΎΠΊΡΠ΅ΡΠ»Π΅Π½ΠΎ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²ΠΈ ΠΏΠΎΠ΄Π°Π»ΡΡΠΈΡ
Π»ΡΠ½Π³Π²ΡΡΡΠΈΡΠ½ΠΈΡ
Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ ΡΠ΅ΡΠΌΡΠ½ΠΎΠ»ΠΎΠ³ΡΡ Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΎ-Π³ΡΠ΄ΡΠΎΠ³ΡΠ°ΡΡΡΠ½ΠΎΡ Π³Π°Π»ΡΠ·Ρ. Π‘ΡΠ°ΡΡΡ Π²ΡΠ΄ΠΎΠ±ΡΠ°ΠΆΠ°Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π½Π°ΡΠΊΠΎΠ²ΠΎΠ³ΠΎ Π°Π½Π°Π»ΡΠ·Ρ ΡΠ΅ΡΠΌΡΠ½ΡΠ² Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΎΡ Π³ΡΠ΄ΡΠΎΠ³ΡΠ°ΡΡΡ Π· ΠΏΠΎΠ³Π»ΡΠ΄Ρ ΡΡ
Π½ΡΠΎΡ ΡΡΡΡΠΊΡΡΡΠΈ ΡΠ° ΡΠ΅ΠΌΠ°Π½ΡΠΈΠΊΠΈ, ΠΏΠΎΠ΄Π°Ρ Π»Π΅ΠΊΡΠΈΠΊΠΎ-ΡΠ΅ΠΌΠ°ΡΠΈΡΠ½Π΅ Π³ΡΡΠΏΡΠ²Π°Π½Π½Ρ ΡΠ»ΡΠ² Π½Π° ΠΏΠΎΠ·Π½Π°ΡΠ΅Π½Π½Ρ ΠΌΠΎΡΡΡΠΊΠΈΡ
ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΡΠΊΠΈΡ
Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΈΡ
Π½Π΅Π±Π΅Π·ΠΏΠ΅ΠΊ, ΠΌΠΎΡΡΡΠΊΠΈΡ
Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΈΡ
ΠΏΠΎΠΏΠ΅ΡΠ΅Π΄ΠΆΠ΅Π½Ρ Ρ ΡΠΈΠ³Π½Π°Π»ΡΠ². Π£ ΡΡΠ°ΡΡΡ Π·ΡΠΎΠ±Π»Π΅Π½ΠΎ ΡΠΏΡΠΎΠ±Ρ Π²ΠΈΠ·Π½Π°ΡΠΈΡΠΈ ΡΠ΅ΠΌΠ°Π½ΡΠΈΡΠ½Ρ ΡΠ° ΡΠ»ΠΎΠ²ΠΎΡΠ²ΡΡΠ½Ρ ΠΎΡΠΎΠ±Π»ΠΈΠ²ΠΎΡΡΡ ΡΠ΅ΡΠΌΡΠ½ΡΠ² Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΎ-Π³ΡΠ΄ΡΠΎΠ³ΡΠ°ΡΡΡΠ½ΠΎΡ Π³Π°Π»ΡΠ·Ρ, Π·βΡΡΠΎΠ²Π°Π½ΠΎ ΠΊΠ»Π°ΡΠΈΡΡΠΊΠ°ΡΡΠΉΠ½Ρ ΠΎΠ·Π½Π°ΠΊΠΈ Π»Π΅ΠΊΡΠΈΡΠ½ΠΈΡ
Π³ΡΡΠΏ Π½Π° ΠΏΠΎΠ·Π½Π°ΡΠ΅Π½Π½Ρ ΠΌΠΎΡΡΡΠΊΠΈΡ
ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΡΠΊΠΈΡ
Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΈΡ
Π½Π΅Π±Π΅Π·ΠΏΠ΅ΠΊ, ΠΌΠΎΡΡΡΠΊΠΈΡ
Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΈΡ
ΠΏΠΎΠΏΠ΅ΡΠ΅Π΄ΠΆΠ΅Π½Ρ Ρ ΡΠΈΠ³Π½Π°Π»ΡΠ², Π²ΠΈΠΎΠΊΡΠ΅ΠΌΠ»Π΅Π½ΠΎ ΠΉ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΠ·ΠΎΠ²Π°Π½ΠΎ ΡΠ΅ΠΌΠ°ΡΠΈΡΠ½Ρ ΠΏΡΠ΄Π³ΡΡΠΏΠΈ ΠΉ ΠΌΡΠΊΡΠΎΠ³ΡΡΠΏΠΈ, ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ Π΄ΠΎΠΌΡΠ½ΡΠ²Π°Π»ΡΠ½ΠΈΠΉ ΡΠΈΠΏ ΡΠ΅ΠΌΠ°Π½ΡΠΈΡΠ½ΠΈΡ
Π²ΡΠ΄Π½ΠΎΡΠ΅Π½Ρ Ρ ΡΠ΅ΠΌΠ°ΡΠΈΡΠ½ΠΈΡ
Π³ΡΡΠΏΠ°Ρ
Π½Π°Π·Π² ΠΌΠΎΡΡΡΠΊΠΈΡ
ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΡΠΊΠΈΡ
Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΈΡ
Π½Π΅Π±Π΅Π·ΠΏΠ΅ΠΊ, ΠΌΠΎΡΡΡΠΊΠΈΡ
Π½Π°Π²ΡΠ³Π°ΡΡΠΉΠ½ΠΈΡ
ΠΏΠΎΠΏΠ΅ΡΠ΅Π΄ΠΆΠ΅Π½Ρ Ρ ΡΠΈΠ³Π½Π°Π»ΡΠ².The article continues the cycle of authorβs articles, devoted to the study of the modern navigation and hydrographical terminology. The article deals with the thematic groups of the Ukrainian navigation and hydrographical vocabulary on denotation of the names of sea charts, marine dangers to navigation, marine navigational warnings and signals. Problems of consequent linguistic researches of navigation and hydrographical terminology are defined. The results of semantic and word-formation analysis of the modern navigation and hydrographical terms are represented. The classification of the vocabulary according to thematic groups on denotation of the names of sea charts, marine dangers to navigation, marine navigational warnings and signals is considered. The kernel and periphery of the modern navigation and hydrographical terminology are determined in the given article. An attempt to find out semantic and word-formation peculiarities of the navigation and hydrographical terminology is made in the article. The classification signs of the lexical groups on denotation of the names of sea charts, marine dangers to navigation, navigational warnings and signals are analyzed in the article. Thematic subgroups and microgroups are singled out. It is established that the dominating type of semantic relations in thematic groups on denotation of the names of sea charts, marine dangers to navigation, navigational warnings and signals is a hyperhiponimic relations.Π‘ΡΠ°ΡΡΡ ΠΏΡΠΎΠ΄ΠΎΠ»ΠΆΠ°Π΅Ρ ΡΠΈΠΊΠ» ΠΏΡΠ±Π»ΠΈΠΊΠ°ΡΠΈΠΉ Π°Π²ΡΠΎΡΠ°, ΠΏΠΎΡΠ²ΡΡΡΠ½Π½ΡΡ
ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ ΡΠΊΡΠ°ΠΈΠ½ΡΠΊΠΎΠΉ Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΠΎ-Π³ΠΈΠ΄ΡΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅ΡΠΌΠΈΠ½ΠΎΠ»ΠΎΠ³ΠΈΠΈ. Π ΡΡΠ°ΡΡΠ΅ ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π³ΡΡΠΏΠΏΡ ΡΠΊΡΠ°ΠΈΠ½ΡΠΊΠΎΠΉ Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΠΎ-Π³ΠΈΠ΄ΡΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π»Π΅ΠΊΡΠΈΠΊΠΈ Π½Π° ΠΎΠ±ΠΎΠ·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΠΌΠΎΡΡΠΊΠΈΡ
ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΠΊΠΈΡ
Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠ΅ΠΉ, ΠΌΠΎΡΡΠΊΠΈΡ
Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΏΡΠ΅Π΄ΡΠΏΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠΉ ΠΈ ΡΠΈΠ³Π½Π°Π»ΠΎΠ², ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Ρ Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠΈΡ
Π»ΠΈΠ½Π³Π²ΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΡΠ΅ΡΠΌΠΈΠ½ΠΎΠ»ΠΎΠ³ΠΈΠΈ Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΠΎ-Π³ΠΈΠ΄ΡΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΎΡΡΠ°ΡΠ»ΠΈ. Π‘ΡΠ°ΡΡΡ ΠΎΡΡΠ°ΠΆΠ°Π΅Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ Π½Π°ΡΡΠ½ΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° ΡΠ΅ΡΠΌΠΈΠ½ΠΎΠ² Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π³ΠΈΠ΄ΡΠΎΠ³ΡΠ°ΡΠΈΠΈ Ρ ΡΠΎΡΠΊΠΈ Π·ΡΠ΅Π½ΠΈΡ ΠΈΡ
ΡΡΡΡΠΊΡΡΡΡ ΠΈ ΡΠ΅ΠΌΠ°Π½ΡΠΈΠΊΠΈ, Π΄Π°ΡΡ Π»Π΅ΠΊΡΠΈΠΊΠΎ-ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΡΡ ΠΊΠ»Π°ΡΡΠΈΡΠΈΠΊΠ°ΡΠΈΡ ΡΠ»ΠΎΠ² Π½Π° ΠΎΠ±ΠΎΠ·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΠΌΠΎΡΡΠΊΠΈΡ
ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΠΊΠΈΡ
Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠ΅ΠΉ, ΠΌΠΎΡΡΠΊΠΈΡ
Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΏΡΠ΅Π΄ΡΠΏΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠΉ ΠΈ ΡΠΈΠ³Π½Π°Π»ΠΎΠ². Π ΡΡΠ°ΡΡΠ΅ ΡΠ΄Π΅Π»Π°Π½Π° ΠΏΠΎΠΏΡΡΠΊΠ° ΠΎΠΏΡΠ΅Π΄Π΅Π»ΠΈΡΡ ΡΠ΅ΠΌΠ°Π½ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈ ΡΠ»ΠΎΠ²ΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΡΠ΅ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΡΠ΅ΡΠΌΠΈΠ½ΠΎΠ² Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΠΎ-Π³ΠΈΠ΄ΡΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΎΡΡΠ°ΡΠ»ΠΈ, ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ ΠΊΠ»Π°ΡΡΠΈΡΠΈΠΊΠ°ΡΠΈΠΎΠ½Π½ΡΠ΅ ΠΏΡΠΈΠ·Π½Π°ΠΊΠΈ Π»Π΅ΠΊΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π³ΡΡΠΏΠΏ Π½Π° ΠΎΠ±ΠΎΠ·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΠΌΠΎΡΡΠΊΠΈΡ
ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΠΊΠΈΡ
Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠ΅ΠΉ, ΠΌΠΎΡΡΠΊΠΈΡ
Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΏΡΠ΅Π΄ΡΠΏΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠΉ ΠΈ ΡΠΈΠ³Π½Π°Π»ΠΎΠ², Π²ΡΠ΄Π΅Π»Π΅Π½Ρ ΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΠΎΠ΄Π³ΡΡΠΏΠΏΡ ΠΈ ΠΌΠΈΠΊΡΠΎΠ³ΡΡΠΏΠΏΡ, ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ Π΄ΠΎΠΌΠΈΠ½ΠΈΡΡΡΡΠΈΠΉ ΡΠΈΠΏ ΡΠ΅ΠΌΠ°Π½ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΉ Π² ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π³ΡΡΠΏΠΏΠ°Ρ
ΠΌΠΎΡΡΠΊΠΈΡ
ΠΊΠ°ΡΡ, ΠΌΠΎΡΡΠΊΠΈΡ
Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠ΅ΠΉ, ΠΌΠΎΡΡΠΊΠΈΡ
Π½Π°Π²ΠΈΠ³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΏΡΠ΅Π΄ΡΠΏΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠΉ ΠΈ ΡΠΈΠ³Π½Π°Π»ΠΎΠ²
The Usage of Radiointerpherometric Method Under the Execution of Highly Accurate Geodesic Tasks
Π ΠΎΠ·Π³Π»ΡΠ½ΡΡΠΎ ΡΠ΅ΠΎΡΠ΅ΡΠΈΠΊΠΎ-ΠΌΠ΅ΡΠΎΠ΄ΠΈΡΠ½Ρ ΡΠ° Π½Π°ΡΠΊΠΎΠ²ΠΎ-ΠΏΡΠ°ΠΊΡΠΈΡΠ½Ρ Π°ΡΠΏΠ΅ΠΊΡΠΈ Π·Π°ΡΡΠΎΡΡΠ²Π°Π½Π½Ρ ΠΌΠ΅ΡΠΎΠ΄Ρ ΡΠ°Π΄ΡΠΎΡΠ½ΡΠ΅ΡΡΠ΅ΡΠΎΠΌΠ΅ΡΡΡΡ
Π· Π½Π°Π΄Π΄ΠΎΠ²Π³ΠΈΠΌΠΈ Π±Π°Π·Π°ΠΌΠΈ (Π ΠΠΠ-ΠΌΠ΅ΡΠΎΠ΄Ρ). ΠΡΠΎΠ±Π»ΠΈΠ²Ρ ΡΠ²Π°Π³Ρ ΠΏΡΠΈΠ΄ΡΠ»Π΅Π½ΠΎ ΠΏΡΠ°ΠΊΡΠΈΡΠ½ΠΈΠΌ Π½Π°ΠΏΡΡΠΌΠ°ΠΌ Π·Π°ΡΡΠΎΡΡΠ²Π°Π½Π½Ρ ΡΡΠΎΠ³ΠΎ
ΠΌΠ΅ΡΠΎΠ΄Ρ. ΠΠΊΡΠ΅ΠΌΠΎ ΠΎΠΊΡΠ΅ΡΠ»Π΅Π½ΠΎ ΠΊΠΎΠ»ΠΎ ΠΏΠΈΡΠ°Π½Ρ, ΡΠΎ ΠΌΠΎΠΆΡΡΡ Π²ΠΈΡΡΡΡΠ²Π°ΡΠΈΡΡ Π·Π° Π΄ΠΎΠΏΠΎΠΌΠΎΠ³ΠΎΡ Π ΠΠΠ-ΠΌΠ΅ΡΠΎΠ΄Ρ, Ρ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²ΠΈ
ΠΉΠΎΠ³ΠΎ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ Π² ΠΏΡΠ°ΠΊΡΠΈΡΡ Π³Π΅ΠΎΠ΄Π΅Π·ΠΈΡΠ½ΠΈΡ
ΡΠ° Π·Π΅ΠΌΠ»Π΅Π²ΠΏΠΎΡΡΠ΄Π½ΠΈΡ
ΡΠΎΠ±ΡΡ.Theoretical-methodical and scientific-practical aspects of the usage of
radiointerpherometric method with overlong bases (ROLB-method) are studied in this paper. Special attention is paid to
practical directions of the usage of this method. The range of questions that can be solved with the help of ROLBmethod
and the prospects of its usage in the practice of geodesic and land managing tasks are separated
The physical properties of AM CVn stars: new insights from Gaia DR2
AM CVn binaries are hydrogen deficient compact binaries with an orbital
period in the 5-65 min range and are predicted to be strong sources of
persistent gravitational wave radiation. Using Gaia Data Release 2, we present
the parallaxes and proper motions of 41 out of the 56 known systems. Compared
to the parallax determined using the HST Fine Guidance Sensor we find that the
archetype star, AM CVn, is significantly closer than previously thought. This
resolves the high luminosity and mass accretion rate which models had
difficulty in explaining. Using Pan-STARRS1 data we determine the absolute
magnitude of the AM CVn stars. There is some evidence that donor stars have a
higher mass and radius than expected for white dwarfs or that the donors are
not white dwarfs. Using the distances to the known AM CVn stars we find strong
evidence that a large population of AM CVn stars have still to be discovered.
As this value sets the background to the gravitational wave signal of LISA,
this is of wide interest. We determine the mass transfer rate for 15 AM CVn
stars and find that the majority have a rate significantly greater than
expected from standard models. This is further evidence that the donor star has
a greater size than expected.Comment: Accepted by A&A in main journa
Primjena nove smjese i tehnologije granulacije sirovine za proces sinterovanje ΕΎeljezne rude
This paper presents a new technology for preparing the mixture for iron ore sintering process. The nature of component mixing and granulation has been discussed. The application of the intensive mixer in the preparation of the process components has been shown. The results of the analysis of the sintering mixture granulation process using laboratory installation for mixing and granulation have been presented.Δlanak donosi nove tehnologije za primjenu smjese za sinterovanje ΕΎeljezne rude. Raspravljena je priroda komponenti smjese i granulacija. Prikazana je intenzivna primjena smjese u pripremnom procesu komponenti. Prikazani su, rabljenjem laboratorijske opreme za smjesu i granulaciju, rezultati analiza granulacije sinterovane smjese
Diabetic Erythrocytes Test by Correlation Coefficient
Even when a healthy individual is studied, his/her erythrocytes in capillaries continually change their shape in a synchronized erratic fashion. In this work, the problem of characterizing the cell behavior is studied from the perspective of bounded correlated random walk, based on the assumption that diffractometric data involves both deterministic and stochastic components. The photometric readings are obtained by ektacytometry over several millions of shear elongated cells, using a home-made device called Erythrodeformeter. We have only a scalar signal and no governing equations; therefore the complete behavior has to be reconstructed in an artificial phase space. To analyze dynamics we used the technique of time delay coordinates suggested by Takens, May algorithm, and Fourier transform. The results suggest that on random-walk approach the samples from healthy controls exhibit significant differences from those from diabetic patients and these could allow us to claim that we have linked mathematical nonlinear tools with clinical aspects of diabetic erythrocytesβ rheological properties
Total spectrum of photon emission by an ultra-relativistic positron channeling in a periodically bent crystal
We present the results of numerical calculations of the channelling and
undulator radiation generated by an ultra-relativistic positron channelling
along a crystal plane, which is periodically bent. The bending might be due
either to the propagation of a transverse acoustic wave through the crystal, or
due to the static strain as it occurs in superlattices. The periodically bent
crystal serves as an undulator. We investigate the dependence of the
intensities of both the ordinary channelling and the undulator radiations on
the parameters of the periodically bent channel with simultaneous account for
the dechannelling effect of the positrons. We demonstrate that there is a range
of parameters in which the undulator radiation dominates over the channelling
one and the characteristic frequencies of both types of radiation are well
separated. This result is important, because the undulator radiation can be
used to create a tunable source of X-ray and gamma-radiation.Comment: published in J. Phys. G: Nucl. Part. Phys. 26 (2000) L87-L95,
http://www.iop.org ; 12 pages, 4 figures, LaTe
Formalism of collective electron excitations in fullerenes
We present a detailed formalism for the description of collective electron
excitations in fullerenes in the process of the electron inelastic scattering.
Considering the system as a spherical shell of a finite width, we show that the
differential cross section is defined by three plasmon excitations, namely two
coupled modes of the surface plasmon and the volume plasmon. The interplay of
the three plasmons appears due to the electron diffraction of the fullerene
shell. Plasmon modes of different angular momenta provide dominating
contributions to the differential cross section depending on the transferred
momentum.Comment: 11 pages, 2 figures; submitted to the special issue "Atomic Cluster
Collisions: Structure and Dynamics from the Nuclear to the Biological Scale"
of Eur. Phys. J.
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