297 research outputs found
Comparison of seismic signatures of flares obtained by SOHO/MDI and GONG instruments
The first observations of seismic responses to solar flares were carried out
using time-distance (TD) and holography techniques applied to SOHO/MDI
Dopplergrams obtained from space and un-affected by terrestrial atmospheric
disturbances. However, the ground-based network GONG is potentially a very
valuable source of sunquake observations, especially in cases where space
observations are unavailable. In this paper we present updated technique for
pre-processing of GONG observations for application of subjacent vantage
holography. Using this method and TD diagrams we investigate several sunquakes
observed in association with M and X-class solar flares and compare the
outcomes with those reported earlier using MDI data. In both GONG and MDI
datasets, for the first time, we also detect the TD ridge associated with the
September 9, 2001 flare. Our results show reassuringly positive identification
of sunquakes from GONG data that can provide further information about the
physics of seismic processes associated with solar flares.Comment: 19 pages, 6 figures, accepted to Astrophysical Journa
Scientific, institutional and personal rivalries among Soviet geographers in the late Stalin era
Scientific, institutional and personal rivalries between three key centres of geographical research and scholarship (the Academy of Sciences Institute of Geography and the Faculties of Geography at Moscow and Leningrad State Universities) are surveyed for the period from 1945 to the early 1950s. It is argued that the debates and rivalries between members of the three institutions appear to have been motivated by a variety of scientific, ideological, institutional and personal factors, but that genuine scientific disagreements were at least as important as political and ideological factors in influencing the course of the debates and in determining their final outcome
Inhomogeneous ground state and the coexistence of two length scales near phase transitions in real solids
Real crystals almost unavoidably contain a finite density of dislocations. We
show that this generic type of long--range correlated disorder leads to a
breakdown of the conventional scenario of critical behavior and standard
renormalization group techniques based on the existence of a simple,
homogeneous ground state. This breakdown is due to the appearance of an
inhomogeneous ground state that changes the character of the phase transition
to that of a percolative phenomenon. This scenario leads to a natural
explanation for the appearance of two length scales in recent high resolution
small-angle scattering experiments near magnetic and structural phase
transitions.Comment: 4 pages, RevTex, no figures; also available from
http://www.tp3.ruhr-uni-bochum.de/archive/tpiii_archive.htm
Solid 4He and the Supersolid Phase: from Theoretical Speculation to the Discovery of a New State of Matter? A Review of the Past and Present Status of Research
The possibility of a supersolid state of matter, i.e., a crystalline solid
exhibiting superfluid properties, first appeared in theoretical studies about
forty years ago. After a long period of little interest due to the lack of
experimental evidence, it has attracted strong experimental and theoretical
attention in the last few years since Kim and Chan (Penn State, USA) reported
evidence for nonclassical rotational inertia effects, a typical signature of
superfluidity, in samples of solid 4He. Since this "first observation", other
experimental groups have observed such effects in the response to the rotation
of samples of crystalline helium, and it has become clear that the response of
the solid is extremely sensitive to growth conditions, annealing processes, and
3He impurities. A peak in the specific heat in the same range of temperatures
has been reported as well as anomalies in the elastic behaviour of solid 4He
with a strong resemblance to the phenomena revealed by torsional oscillator
experiments. Very recently, the observation of unusual mass transport in hcp
solid 4He has also been reported, suggesting superflow. From the theoretical
point of view, powerful simulation methods have been used to study solid 4He,
but the interpretation of the data is still rather difficult; dealing with the
question of supersolidity means that one has to face not only the problem of
the coexistence of quantum coherence phenomena and crystalline order, exploring
the realm of spontaneous symmetry breaking and quantum field theory, but also
the problem of the role of disorder, i.e., how defects, such as vacancies,
impurities, dislocations, and grain boundaries, participate in the phase
transition mechanism.Comment: Published on J. Phys. Soc. Jpn., Vol.77, No.11, p.11101
Modern Conception of the Control over the Abundance of Carriers and Vectors of Plague in the Territory of the Russian Federation
Disinfestation and deratization remain the main ways of non-specific disease prophylaxis in natural plague foci. Modern strategies, tactics, methods and means of control over carriers and vectors of plague and associated infectious diseases are selected with due consideration to epidemiological potential of territories, epizootic activity of a foci, peculiarities of population ecology of animals that are of a medical significance, preservation of biodiversity in natural ecosystems, and the requirements for human and natural environments protection from pollutants
Amplified spontaneous emission induced peculiarities of the passively Q-switched diode pumped erbium laser dynamics
Observation of a new excitation in bcc solid 4He by inelastic neutron scattering
We report neutron scattering measurements of the phonons in bcc solid 4He. In
general, only 3 accoustic phonon branches should exist in a monoatomic cubic
crystal. In addition to these phonon branches, we found a new ''optic-like''
mode along the [110] direction. One possible interpretation of this new mode is
in terms of localized excitations unique to a quantum solid.Comment: Text and 4 figures, to appear in Phys. Rev. Let
Π Π΅Π·ΠΈΡΡΠ΅Π½ΡΠ½ΠΎΡΡΡ ΠΊ Π°Π½ΡΠΈΠ±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΡΠΌ ΠΏΡΠ΅ΠΏΠ°ΡΠ°ΡΠ°ΠΌ ΠΈ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Π°ΠΌ ΠΈΠ·ΠΎΠ»ΡΡΠΎΠ² Klebsiella pneumoniae, Π²ΡΠ΄Π΅Π»Π΅Π½Π½ΡΡ ΠΎΡ Π΄Π΅ΡΠ΅ΠΉ ΡΠ°Π·Π½ΠΎΠ³ΠΎ Π²ΠΎΠ·ΡΠ°ΡΡΠ° Ρ ΠΊΠΈΡΠ΅ΡΠ½ΡΠΌΠΈ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΡΠΌΠΈ
The aim is to study the antibiotic and phage resistance of K. pneumoniae strains isolated from children with acute intestinal infections. Materials and methods. 490 K. pneumoniae strains isolated by the bacteriological method from feces from patients with intestinal infections of various etiologies aged from 1 month to 18 years in the period 2019β2021 were studied. The diagnosis of intestinal infection caused by K. pneumoniae was established taking into account the detection of the pathogen at a concentration of at least 5 lg CFU/g (n = 283; 57.8%). Children with Klebsiella seeding, made up three age groups: from 1 to 12 months of life (n = 245; 50%); from 1 to 3 years (n = 131; 26.7%); from 3 to 18 years (n = 114; 23.3%). Results. A higher frequency of K. pneumoniae seeding in high concentrations from fecal samples of children with intestinal infections aged from 1 to 12 months was established (?2 = 14.24; p < 0.001). Analysis of the frequency of K. pneumoniae resistance to antimicrobials revealed its increase to ampicillin/sulbactam from 4.2 Β± 1.6% to 9.7 Β± 1.9% and to gentamicin from 3.0 Β± 1.3% to 7.6 Β± 1.7% (p < 0.05) with an increase in the concentration of the pathogen from 3β4 to 5β6 lg CFU/ml. In K. pneumoniae strains isolated in low concentrations, resistance to polyvalent anti-klebsiella bacteriophage was significantly higher than to monovalent bacteriophage. Conclusion. Children of the first year of life belong to the risk group for the development of klebsiella intestinal infection. An increase in the frequency of K. pneumoniae resistance to ampicillin/sulbactam and gentamicin correlates with an increase in the concentration of the pathogen in fecal samples.Π¦Π΅Π»Ρ β ΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΡΠΈΠΎΡΡΠΎΠΏΠ½ΠΎΠΉ ΡΠ΅ΡΠ°ΠΏΠΈΠΈ Π±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΡΡ
ΠΠΠ Ρ Π΄Π΅ΡΠ΅ΠΉ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
Π²ΠΎΠ·ΡΠ°ΡΡΠ½ΡΡ
Π³ΡΡΠΏΠΏ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΡΠ΅Π·ΠΈΡΡΠ΅Π½ΡΠ½ΠΎΡΡΠΈ ΡΡΠ°ΠΌΠΌΠΎΠ² Klebsiella Ρneumoniae Π²Π½Π΅Π±ΠΎΠ»ΡΠ½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠΈΡΡ
ΠΎΠΆΠ΄Π΅Π½ΠΈΡ ΠΊ Π°Π½ΡΠΈΠ±ΠΈΠΎΡΠΈΠΊΠ°ΠΌ ΠΈ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Π°ΠΌ. ΠΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΠΈ ΠΌΠ΅ΡΠΎΠ΄Ρ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ 490 ΡΡΠ°ΠΌΠΌΠΎΠ² K. pneumoniae, Π²ΡΠ΄Π΅Π»Π΅Π½Π½ΡΡ
Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΈΠ· ΡΠ΅ΠΊΠ°Π»ΠΈΠΉ ΠΎΡ Π±ΠΎΠ»ΡΠ½ΡΡ
ΠΊΠΈΡΠ΅ΡΠ½ΡΠΌΠΈ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΡΠΌΠΈ ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠΉ ΡΡΠΈΠΎΠ»ΠΎΠ³ΠΈΠΈ Π² Π²ΠΎΠ·ΡΠ°ΡΡΠ΅ ΠΎΡ 1 ΠΌΠ΅ΡΡΡΠ° Π΄ΠΎ 18 Π»Π΅Ρ Π² ΠΏΠ΅ΡΠΈΠΎΠ΄ 2019β2021 Π³Π³. ΠΠΈΠ°Π³Π½ΠΎΠ· ΠΊΠΈΡΠ΅ΡΠ½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΈ, Π²ΡΠ·Π²Π°Π½Π½ΠΎΠΉ K. pneumoniae, ΡΡΡΠ°Π½Π°Π²Π»ΠΈΠ²Π°Π»ΠΈ ΠΏΡΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΠΈ Π²ΠΎΠ·Π±ΡΠ΄ΠΈΡΠ΅Π»Ρ Π² ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Π½Π΅ ΠΌΠ΅Π½Π΅Π΅ 5 lg ΠΠΠ/Π³ (n = 283; 57,8%). ΠΠ΅ΡΠΈ Ρ Π²ΡΡΠ΅Π²ΠΎΠΌ ΠΊΠ»Π΅Π±ΡΠΈΠ΅Π»Π» ΡΠΎΡΡΠ°Π²ΠΈΠ»ΠΈ ΡΡΠΈ Π²ΠΎΠ·ΡΠ°ΡΡΠ½ΡΠ΅ Π³ΡΡΠΏΠΏΡ: ΠΎΡ 1 Π΄ΠΎ 12 ΠΌΠ΅ΡΡΡΠ΅Π² (n = 245; 50%); ΠΎΡ 1 Π΄ΠΎ 3 Π»Π΅Ρ (n = 131; 26,7%); ΠΎΡ 3 Π΄ΠΎ 18 Π»Π΅Ρ (n = 114; 23,3%). Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Π° Π±ΠΎΠ»Π΅Π΅ Π²ΡΡΠΎΠΊΠ°Ρ ΡΠ°ΡΡΠΎΡΠ° Π²ΡΡΠ΅Π²ΠΎΠ² K. pneumoniae Π² Π²ΡΡΠΎΠΊΠΈΡ
ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΡΡ
ΠΈΠ· ΡΠ΅ΠΊΠ°Π»ΡΠ½ΡΡ
ΠΏΡΠΎΠ± Π΄Π΅ΡΠ΅ΠΉ Ρ ΠΊΠΈΡΠ΅ΡΠ½ΡΠΌΠΈ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΡΠΌΠΈ Π² Π²ΠΎΠ·ΡΠ°ΡΡΠ΅ ΠΎΡ 1 Π΄ΠΎ 12 ΠΌΠ΅ΡΡΡΠ΅Π² (Ο2 = 14,24; p < 0,001). ΠΠ½Π°Π»ΠΈΠ· ΡΠ°ΡΡΠΎΡΡ ΡΠ΅Π·ΠΈΡΡΠ΅Π½ΡΠ½ΠΎΡΡΠΈ K. pneumoniae ΠΊ Π°Π½ΡΠΈΠΌΠΈΠΊΡΠΎΠ±Π½ΡΠΌ ΠΏΡΠ΅ΠΏΠ°ΡΠ°ΡΠ°ΠΌ Π²ΡΡΠ²ΠΈΠ» Π΅Π΅ Π½Π°ΡΠ°ΡΡΠ°Π½ΠΈΠ΅ ΠΊ Π°ΠΌΠΏΠΈΡΠΈΠ»Π»ΠΈΠ½Ρ/ΡΡΠ»ΡΠ±Π°ΠΊΡΠ°ΠΌΡ Ρ 4,2 Β± 1,6% Π΄ΠΎ 9,7 Β± 1,9% ΠΈ ΠΊ Π³Π΅Π½ΡΠ°ΠΌΠΈΡΠΈΠ½Ρ Ρ 3,0 Β± 1,3% Π΄ΠΎ 7,6 Β± 1,7% (p < 0,05) Ρ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Π²ΠΎΠ·Π±ΡΠ΄ΠΈΡΠ΅Π»Ρ ΠΎΡ 3β4 Π΄ΠΎ 5β6 lg ΠΠΠ/ΠΌΠ». Π£ ΡΡΠ°ΠΌΠΌΠΎΠ² K. pneumoniae, Π²ΡΠ΄Π΅Π»Π΅Π½Π½ΡΡ
Π² Π½ΠΈΠ·ΠΊΠΎΠΉ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ, ΡΠ΅Π·ΠΈΡΡΠ΅Π½ΡΠ½ΠΎΡΡΡ ΠΊ ΠΏΠΎΠ»ΠΈΠ²Π°Π»Π΅Π½ΡΠ½ΠΎΠΌΡ Π°Π½ΡΠΈΠΊΠ»Π΅Π±ΡΠΈΠ΅Π»Π»Π΅Π·Π½ΠΎΠΌΡ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Ρ, Π±ΡΠ»Π° Π·Π½Π°ΡΠΈΠΌΠΎ Π²ΡΡΠ΅, ΡΠ΅ΠΌ ΠΊ ΠΌΠΎΠ½ΠΎΠ²Π°Π»Π΅Π½ΡΠ½ΠΎΠΌΡ Π±Π°ΠΊΡΠ΅ΡΠΈΠΎΡΠ°Π³Ρ. ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅. ΠΠ΅ΡΠΈ ΠΏΠ΅ΡΠ²ΠΎΠ³ΠΎ Π³ΠΎΠ΄Π° ΠΆΠΈΠ·Π½ΠΈ ΠΎΡΠ½ΠΎΡΡΡΡΡ ΠΊ Π³ΡΡΠΏΠΏΠ΅ ΡΠΈΡΠΊΠ° ΠΏΠΎ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΠΊΠ»Π΅Π±ΡΠΈΠ΅Π»Π»Π΅Π·Π½ΠΎΠΉ ΠΊΠΈΡΠ΅ΡΠ½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΈ. ΠΠ°ΡΠ°ΡΡΠ°Π½ΠΈΠ΅ ΡΠ°ΡΡΠΎΡΡ ΡΠ΅Π·ΠΈΡΡΠ΅Π½ΡΠ½ΠΎΡΡΠΈ K. pneumoniae ΠΊ Π°ΠΌΠΏΠΈΡΠΈΠ»Π»ΠΈΠ½Ρ/ΡΡΠ»ΡΠ±Π°ΠΊΡΠ°ΠΌΡ ΠΈ ΠΊ Π³Π΅Π½ΡΠ°ΠΌΠΈΡΠΈΠ½Ρ ΠΊΠΎΡΡΠ΅Π»ΠΈΡΡΠ΅Ρ Ρ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Π²ΠΎΠ·Π±ΡΠ΄ΠΈΡΠ΅Π»Ρ Π² ΠΏΡΠΎΠ±Π°Ρ
ΡΠ΅ΠΊΠ°Π»ΠΈΠΉ
Evolution equation for the error correlation function of vorticity prediction used by a barotropic synoptic motion model to assimilate data
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