106 research outputs found
Π£ΡΠΏΠ΅ΡΠ½ΠΎΠ΅ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΏΠΎΡΠΎΡΠΊΠΎΠ²ΠΎΠΉ ΡΠΎΡΠΌΡ ΡΠΎΠ±ΡΠ°ΠΌΠΈΡΠΈΠ½Π° Ρ Π²Π·ΡΠΎΡΠ»ΠΎΠ³ΠΎ Π±ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΌΡΠΊΠΎΠ²ΠΈΡΡΠΈΠ΄ΠΎΠ·ΠΎΠΌ
Successful treatment of adult cystic fibrosis patient with inhaled powder of tobramycin.Π£ΡΠΏΠ΅ΡΠ½ΠΎΠ΅ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΏΠΎΡΠΎΡΠΊΠΎΠ²ΠΎΠΉ ΡΠΎΡΠΌΡ ΡΠΎΠ±ΡΠ°ΠΌΠΈΡΠΈΠ½Π° Ρ Π²Π·ΡΠΎΡΠ»ΠΎΠ³ΠΎ Π±ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΌΡΠΊΠΎΠ²ΠΈΡΡΠΈΠ΄ΠΎΠ·ΠΎΠΌ
372 Survival analysis of cystic fibrosis (CF) patients in the Moscow region of Russia in 2000β2010
ΠΠ½Π³Π°Π»ΡΡΠΈΠΎΠ½Π½ΡΠΉ ΡΠΎΠ±ΡΠ°ΠΌΠΈΡΠΈΠ½ Π² Π»Π΅ΡΠ΅Π½ΠΈΠΈ Ρ ΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΈΠ½Π΅Π³Π½ΠΎΠΉΠ½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΈ ΠΏΡΠΈ ΠΌΡΠΊΠΎΠ²ΠΈΡΡΠΈΠ΄ΠΎΠ·Π΅
Tobramycin inhalations in therapy of chronic infection Pseudomonas aeruginosa in cystic fibrosis.ΠΠ½Π³Π°Π»ΡΡΠΈΠΎΠ½Π½ΡΠΉ ΡΠΎΠ±ΡΠ°ΠΌΠΈΡΠΈΠ½ Π² Π»Π΅ΡΠ΅Π½ΠΈΠΈ Ρ
ΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΈΠ½Π΅Π³Π½ΠΎΠΉΠ½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΈ ΠΏΡΠΈ ΠΌΡΠΊΠΎΠ²ΠΈΡΡΠΈΠ΄ΠΎΠ·Π΅
Attractiveness of periodic orbits in parametrically forced systemswith time-increasing friction
We consider dissipative one-dimensional systems subject to a periodic force
and study numerically how a time-varying friction affects the dynamics. As a
model system, particularly suited for numerical analysis, we investigate the
driven cubic oscillator in the presence of friction. We find that, if the
damping coefficient increases in time up to a final constant value, then the
basins of attraction of the leading resonances are larger than they would have
been if the coefficient had been fixed at that value since the beginning. From
a quantitative point of view, the scenario depends both on the final value and
the growth rate of the damping coefficient. The relevance of the results for
the spin-orbit model are discussed in some detail.Comment: 30 pages, 6 figure
Bethe ansatz for the Harper equation: Solution for a small commensurability parameter
The Harper equation describes an electron on a 2D lattice in magnetic field
and a particle on a 1D lattice in a periodic potential, in general,
incommensurate with the lattice potential. We find the distribution of the
roots of Bethe ansatz equations associated with the Harper equation in the
limit as alpha=1/Q tends to 0, where alpha is the commensurability parameter (Q
is integer). Using the knowledge of this distribution we calculate the higher
and lower boundaries of the spectrum of the Harper equation for small alpha.
The result is in agreement with the semiclassical argument, which can be used
for small alpha.Comment: 17 pages including 5 postscript figures, Latex, minor changes, to
appear in Phys.Rev.
Large Deviations of the Maximum Eigenvalue in Wishart Random Matrices
We compute analytically the probability of large fluctuations to the left of
the mean of the largest eigenvalue in the Wishart (Laguerre) ensemble of
positive definite random matrices. We show that the probability that all the
eigenvalues of a (N x N) Wishart matrix W=X^T X (where X is a rectangular M x N
matrix with independent Gaussian entries) are smaller than the mean value
=N/c decreases for large N as , where \beta=1,2 correspond respectively to
real and complex Wishart matrices, c=N/M < 1 and \Phi_{-}(x;c) is a large
deviation function that we compute explicitly. The result for the Anti-Wishart
case (M < N) simply follows by exchanging M and N. We also analytically
determine the average spectral density of an ensemble of constrained Wishart
matrices whose eigenvalues are forced to be smaller than a fixed barrier. The
numerical simulations are in excellent agreement with the analytical
predictions.Comment: Published version. References and appendix adde
ΠΡΡΠ΅ΠΎΠΏΠΎΡΠΎΠ· Ρ Π±ΠΎΠ»ΡΠ½ΡΡ ΠΌΡΠΊΠΎΠ²ΠΈΡΡΠΈΠ΄ΠΎΠ·ΠΎΠΌ: Π½ΠΎΠ²Π°Ρ ΠΏΡΠΎΠ±Π»Π΅ΠΌΠ° ΠΈ Π½Π΅ΡΠ΅ΡΠ΅Π½Π½ΡΠ΅ Π²ΠΎΠΏΡΠΎΡΡ
Osteoporosis in cystic fibrosis patients: a new problem and unresolved issues.ΠΡΡΠ΅ΠΎΠΏΠΎΡΠΎΠ· Ρ Π±ΠΎΠ»ΡΠ½ΡΡ
ΠΌΡΠΊΠΎΠ²ΠΈΡΡΠΈΠ΄ΠΎΠ·ΠΎΠΌ: Π½ΠΎΠ²Π°Ρ ΠΏΡΠΎΠ±Π»Π΅ΠΌΠ° ΠΈ Π½Π΅ΡΠ΅ΡΠ΅Π½Π½ΡΠ΅ Π²ΠΎΠΏΡΠΎΡΡ
Bloch electron in a magnetic field and the Ising model
The spectral determinant det(H-\epsilon I) of the Azbel-Hofstadter
Hamiltonian H is related to Onsager's partition function of the 2D Ising model
for any value of magnetic flux \Phi=2\pi P/Q through an elementary cell, where
P and Q are coprime integers. The band edges of H correspond to the critical
temperature of the Ising model; the spectral determinant at these (and other
points defined in a certain similar way) is independent of P. A connection of
the mean of Lyapunov exponents to the asymptotic (large Q) bandwidth is
indicated.Comment: 4 pages, 1 figure, REVTE
Nonintersecting Brownian motions on the half-line and discrete Gaussian orthogonal polynomials
We study the distribution of the maximal height of the outermost path in the
model of nonintersecting Brownian motions on the half-line as , showing that it converges in the proper scaling to the Tracy-Widom
distribution for the largest eigenvalue of the Gaussian orthogonal ensemble.
This is as expected from the viewpoint that the maximal height of the outermost
path converges to the maximum of the process minus a
parabola. Our proof is based on Riemann-Hilbert analysis of a system of
discrete orthogonal polynomials with a Gaussian weight in the double scaling
limit as this system approaches saturation. We consequently compute the
asymptotics of the free energy and the reproducing kernel of the corresponding
discrete orthogonal polynomial ensemble in the critical scaling in which the
density of particles approaches saturation. Both of these results can be viewed
as dual to the case in which the mean density of eigenvalues in a random matrix
model is vanishing at one point.Comment: 39 pages, 4 figures; The title has been changed from "The limiting
distribution of the maximal height of nonintersecting Brownian excursions and
discrete Gaussian orthogonal polynomials." This is a reflection of the fact
that the analysis has been adapted to include nonintersecting Brownian
motions with either reflecting of absorbing boundaries at zero. To appear in
J. Stat. Phy
Universal parity effects in the entanglement entropy of XX chains with open boundary conditions
We consider the Renyi entanglement entropies in the one-dimensional XX
spin-chains with open boundary conditions in the presence of a magnetic field.
In the case of a semi-infinite system and a block starting from the boundary,
we derive rigorously the asymptotic behavior for large block sizes on the basis
of a recent mathematical theorem for the determinant of Toeplitz plus Hankel
matrices. We conjecture a generalized Fisher-Hartwig form for the corrections
to the asymptotic behavior of this determinant that allows the exact
characterization of the corrections to the scaling at order o(1/l) for any n.
By combining these results with conformal field theory arguments, we derive
exact expressions also in finite chains with open boundary conditions and in
the case when the block is detached from the boundary.Comment: 24 pages, 9 figure
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