2,973 research outputs found
Rolul ESWL în tratamentul litiazei pe rinichi unic
Summary Extracoroporeal shock wave lithotripsy (ESWL), beeing the less invasive treatment with great efficiency, proved in time, can be used for the treatment of urinary lithiasis in solitary kidney. In 10 years we performed ESWL to 129 patients with stones on solitary kidney (1,76%), aged between 20 and 80 years, performing 198 ESWL treatments. In 59,68% of the patients we desintegrated the stone after 1 ESWL. We had complications to 10 patients (7,75%) and in 7 cases it was necessary to perform other procedures to resolve them. In 6 patients (4,65) ESWL was not successful. In some cases, we consider that ESWL can be successfully performed to the patients with urinary lithiasis on solitary kidney. The complications are not severe, and can be resolved with other the less invasive procedures. It is very important to survey the patients after ESWL and to find early the complications that can occour post-ESWL
Spectroscopic Follow-Up of the Hercules Aquila Cloud
We designed a follow-up program to find the spectroscopic properties of the
Hercules-Aquila Cloud (HAC) and test scenarios for its formation. We measured
the radial velocities (RVs) of 45 RR Lyrae in the southern portion of the HAC
using the facilities at the MDM observatory, producing the first large sample
of velocities in the HAC. We found a double-peaked distribution in RVs, skewed
slightly to negative velocities. We compared both the morphology of HAC
projected onto the plane of the sky and the distribution of velocities in this
structure outlined by RR Lyrae and other tracer populations at different
distances to N-body simulations. We found that the behaviour is characteristic
of an old, well-mixed accretion event with small apo-galactic radius. We cannot
yet rule out other formation mechanisms for the HAC. However, if our
interpretation is correct, HAC represents just a small portion of a much larger
debris structure spread throughout the inner Galaxy whose distinct kinematic
structure should be apparent in RV studies along many lines of sight.Comment: accepted by MNRAS; 12 pages, 7 figure
A parametric description of the 3D structure of the Galactic bar/bulge using the VVV survey
© 2017 The Authors. We study the structure of the inner Milky Way using the latest data release of the VISTA Variables in the Via Lactea (VVV) survey. The VVV is a deep near-infrared, multi-colour photometric survey with a coverage of 300 square degrees towards the bulge/bar. We use red clump (RC) stars to produce a high-resolution dust map of the VVV's field of view. From dereddened colour-magnitude diagrams, we select red giant branch stars to investigate their 3D density distribution within the central 4 kpc. We demonstrate that our best-fitting parametric model of the bulge density provides a good description of the VVV data, with a median percentage residual of 5 per cent over the fitted region. The strongest of the otherwise lowlevel residuals are overdensities associated with a low-latitude structure as well as the so-called X-shape previously identified using the split RC. These additional components contribute only ~5 per cent and ~7 per cent respectively to the bulge mass budget. The best-fitting bulge is 'boxy' with an axial ratio of [1:0.44:0.31] and is rotated with respect to the Sun-Galactic Centre line by at least 20°. We provide an estimate of the total, full sky, mass of the bulge of MbulgeChabrier= 2.36 × 1010M⊙for a Chabrier initial mass function. We show that there exists a strong degeneracy between the viewing angle and the dispersion of the RC absolute magnitude distribution. The value of the latter is strongly dependent on the assumptions made about the intrinsic luminosity function of the bulge
First analysis of anisotropic flow with Lee--Yang zeroes
We report on the first analysis of directed and elliptic flow with the new
method of Lee--Yang zeroes. Experimental data are presented for Ru+Ru reactions
at 1.69 AGeV measured with the FOPI detector at SIS/GSI. The results obtained
with several methods, based on the event-plane reconstruction, on Lee--Yang
zeroes, and on multi-particle cumulants (up to 5th order) applied for the first
time at SIS energies, are compared. They show conclusive evidence that
azimuthal correlations between nucleons and composite particles at this energy
are largely dominated by anisotropic flow.Comment: 5 pages, 3 figures, submitted to Phys. Rev. C Rapid Co
Strange meson production in Al+Al collisions at 1.9A GeV
The production of K, K and (1020) mesons is studied in Al+Al
collisions at a beam energy of 1.9A GeV which is close or below the production
threshold in NN reactions. Inverse slopes, anisotropy parameters, and total
emission yields of K mesons are obtained. A comparison of the ratio of
kinetic energy distributions of K and K mesons to the HSD transport
model calculations suggests that the inclusion of the in-medium modifications
of kaon properties is necessary to reproduce the ratio. The inverse slope and
total yield of mesons are deduced. The contribution to K production
from meson decays is found to be [17 3 (stat) (syst)]
%. The results are in line with previous K and data obtained for
different colliding systems at similar incident beam energies.Comment: 16 pages, 11 figure
- …