669 research outputs found
Test of hybrid metric-Palatini f(R)-gravity in binary pulsars
We developed the parameterized post-Keplerian formalism for hybrid
metric-Palatini -gravity. We obtained analytical expressions in the
generel eccentric case for four PPK parameters: , ,
and . Using observational data of PSR J0737-3039 and PSR J1903+0327 we
imposed restrictions on the parameters of hybrid f(R)-gravity and showed that
this theory is not ruled out by the observations in strong field regime. In
addition we obtained predictions for masses of systems components and found
that considered astrophysical objects will be heavier than in GR.Comment: 12 pages, 4 figure
Infrared stability of ABJ-like theories
We consider marginal deformations of the superconformal ABJM/ABJ models which
preserve N=2 supersymmetry. We determine perturbatively the spectrum of fixed
points and study their infrared stability. We find a closed line of fixed
points which is IR stable. The fixed point corresponding to the ABJM/ABJ models
is stable under marginal deformations which respect the original SU(2)xSU(2)
invariance, while deformations which break this group destabilize the theory
which then flows to a less symmetric fixed point. We discuss the addition of
flavor degrees of freedom. We prove that in general a flavor marginal
superpotential does not destabilize the system in the IR. An exception is
represented by a marginal coupling which mixes matter charged under different
gauge sectors. Finally, we consider the case of relevant deformations which
should drive the system to a strongly coupled IR fixed point recently
investigated in arXiv:0909.2036 [hep-th].Comment: 1+11 pages, 4 figures; v2: minor correction
Harmonic analysis on spherical homogeneous spaces with solvable stabilizer
For all spherical homogeneous spaces G/H, where G is a simply connected
semisimple algebraic group and H a connected solvable subgroup of G, we compute
the spectra of the representations of G on spaces of regular sections of
homogeneous line bundles over G/H.Comment: v2: 14 pages, minor correction
ΠΠΠ’ΠΠ€ΠΠΠΠΠΠΠΠΠ― ΠΠΠΠ‘Π’Π ΠΠΠΠ Π₯Π ΠΠΠΠ§ΠΠ‘ΠΠΠ ΠΠΠ‘Π’Π Π£ΠΠ’ΠΠΠΠΠ ΠΠΠΠΠΠΠ ΠΠΠΠΠΠ₯
The lecture describes the mechanisms of deterioration of respiratory exchange during exacerbation of chronic obstructive pulmonary disease (COPD). It has been demonstrated that the rapid diagnosis and treatment of exacerbations is an important part of COPD management. The restriction ofΒ expiratory airflow followed by the increased dynamic pulmonary hyperinflation seems to be the most important pathophysiological mechanism in COPD exacerbation, which has catastrophic consequences for the respiratory system with respect to respiratory mechanics and gas exchange. In some patients, associated disorders of cardiopulmonary interactions also undoubtedly play an important role.Π Π»Π΅ΠΊΡΠΈΠΈ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΡ ΡΡ
ΡΠ΄ΡΠ΅Π½ΠΈΡ Π³Π°Π·ΠΎΠΎΠ±ΠΌΠ΅Π½Π° ΠΏΡΠΈ ΠΎΠ±ΠΎΡΡΡΠ΅Π½ΠΈΠΈ Ρ
ΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΎΠ±ΡΡΡΡΠΊΡΠΈΠ²Π½ΠΎΠΉ Π±ΠΎΠ»Π΅Π·Π½ΠΈ Π»Π΅Π³ΠΊΠΈΡ
(Π₯ΠΠΠ). ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π±ΡΡΡΡΠ°Ρ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠ° ΠΈ Π»Π΅ΡΠ΅Π½ΠΈΠ΅ ΠΎΠ±ΠΎΡΡΡΠ΅Π½ΠΈΠΉ ΡΠ²Π»ΡΡΡΡΡ Π²Π°ΠΆΠ½ΠΎΠΉ ΡΠ΅Π»ΡΡ Β«ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡΒ» Π₯ΠΠΠ. ΠΠ³ΡΠ°Π½ΠΈΡΠ΅Π½ΠΈΠ΅ ΡΠΊΡΠΏΠΈΡΠ°ΡΠΎΡΠ½ΠΎΠ³ΠΎ Π²ΠΎΠ·Π΄ΡΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ° Ρ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠΈΠΌ Π½Π°ΡΠ°ΡΡΠ°Π½ΠΈΠ΅ΠΌ Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ Π»Π΅Π³ΠΎΡΠ½ΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΠΈΠ½ΡΠ»ΡΡΠΈΠΈ, ΠΏΠΎ-Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌΡ, ΡΠ²Π»ΡΡΡΡΡ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π²Π°ΠΆΠ½ΡΠΌΠΈ ΠΏΠ°ΡΠΎΡΠΈΠ·ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠ°ΠΌΠΈ ΠΏΡΠΈ ΠΎΠ±ΠΎΡΡΡΠ΅Π½ΠΈΠΈ Π₯ΠΠΠ, ΠΈΠΌΠ΅ΡΡΠΈΠΌΠΈ ΠΊΠ°ΡΠ°ΡΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΠ²ΠΈΡ Π΄Π»Ρ ΡΠ΅ΡΠΏΠΈΡΠ°ΡΠΎΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ Π² ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΈ ΠΌΠ΅Ρ
Π°Π½ΠΈΠΊΠΈ Π΄ΡΡ
Π°Π½ΠΈΡ ΠΈ Π³Π°Π·ΠΎΠΎΠ±ΠΌΠ΅Π½Π°. ΠΡΡΠΎΡΠΈΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ ΡΠ΅ΡΠ΄Π΅ΡΠ½ΠΎ-Π»Π΅Π³ΠΎΡΠ½ΡΡ
Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΉ Ρ Π½Π΅ΠΊΠΎΡΠΎΡΡΡ
ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ² ΡΠ°ΠΊΠΆΠ΅, Π½Π΅ΡΠΎΠΌΠ½Π΅Π½Π½ΠΎ, ΠΈΠ³ΡΠ°ΡΡ Π²Π°ΠΆΠ½ΡΡ ΡΠΎΠ»Ρ
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