Abstract
Elliptic (
v
2
) and triangular (
v
3
) anisotropic flow coefficients for inclusive and identified charged hadrons (
π
±
,
K
±
,
p
,
p
¯
) at midrapidity in Au+Au collisions, measured by the ...STAR experiment in the Beam Energy Scan (BES) at the Relativistic Heavy Ion Collider at
s
N
N
=
11.5
-
62.4
GeV
, are presented. We observe that the triangular flow signal (
v
3
) of identified hadrons exhibits similar trends as first observed for
v
2
in Au+Au collisions, i.e. (i) mass ordering at low transverse momenta,
p
T
< 2 GeV/c, (ii) meson/baryon splitting at intermediate
p
T
, 2 <
p
T
< 4 GeV/c, and (iii) difference in flow signal of protons and antiprotons. New measurements of
v
3 excitation function could serve as constraints to test different models and to add new information about the temperature dependence of the transport properties of the strongly interacting matter.
The elliptic (
) flow is one of the important observables sensitive to the equation of state (EOS) and transport properties of the strongly interacting matter created in relativistic heavy-ion ...collisions. In this work, we discuss the scaling properties of elliptic flow at Nuclotron-NICA energies:
GeV.
The elliptic (
) flow is one of the important observables sensitive to the equation of state (EOS) and transport properties of the strongly interacting matter created in relativistic heavy-ion ...collisions. In this work, we discuss the scaling properties of elliptic flow at Nuclotron-NICA energies:
GeV.
The centrality of heavy-ion collisions is a key parameter in the study of the properties of the strongly interacting matter at extreme temperature or baryon density. We present the different ...procedures of centrality determination for the Baryonic Matter at Nuclotron (BM@N) experiment. The validity of the procedures is assessed using the simulated data for Xe
Cs(I) collisions at beam kinetic energy of 4
A
GeV.
Stable water-soluble complexes of Cd-free ZnSe ZnS quantum dots (QDs) and chlorin e6 complexes have been prepared. These complexes have shown approximately 50% intracomplex fluorescence resonance ...energy transfer from QDs to chlorin e6. The photodynamic therapy (PDT) test of the complexes against the Erlich acsite carcinoma cell culture demonstrated a two-fold enhancement of the cancer cell photodynamic destruction as compared to that of free chlorin e6 molecules. It was shown that the PDT effect was significantly increased due to two factors: the efficient QD-chlorin e6 photoexcitation energy transfer and the improvement of cellular uptake of the photosensitizer in the presence of ZnSe ZnS QDs.
Granulated zinc metal films on fused quartz and sapphire supports were obtained via pulsed laser deposition and then oxidized in air at different temperatures. We found that optical absorbance ...spectra of oxide films do not depend on the oxidation temperatures from 400 to 750 °C. The spectra are characterized by the fundamental absorption edge and the exciton maximum at 370 nm. At the oxidation temperature of 770 °C, the optical absorbance spectrum changes dramatically. The fundamental absorption edge was shown to shift to shorter wavelength, thereby heralding the growth of the band gap. To elucidate the origin of the observed phenomena, the films stoichiometry was studied via X-ray photoelectron spectroscopy (XPS). Band edge luminescence was observed independent of the oxidation temperature. On the other hand, visible luminescence at 500 nm occurs only at the oxidation temperatures higher than 600 °C and grows afterward. According to the results of XPS, the reason for the appearance of that luminescence peak is the appearance of oxygen vacancies at oxidation temperatures above 600 °C.
Identification of clinical and instrumental predictors for non-arrhythmic death in patients with heart failure (HF) and implantable cardioverter-defibrillator (ICD).
Through a telephone survey and ...examination of medical records from hospital and polyclinic databases, data were obtained on the alive/dead status and causes of death for 260 patients with heart failure (HF) and ICD included in the Kuzbass Registry of Patients with ICD. The follow-up period was 1.5 years. Clinical and instrumental parameters entered into the registry before the ICD implantation were included in a univariate and multivariate step-by-step analysis using the logistic (for qualitative variables) and linear (for quantitative variables) regression with calculation of regression coefficients and construction of a prognostic regression model. The quality of the created model was assessed using a ROC analysis.
During the observation period, 54 (20.8%) patients died. In 21 (38.8%) patients, death occurred in the hospital and was caused by acute decompensated heart failure in 15 (71.4%) patients, myocardial infarction in 3 (14.3%) patients, stroke in 1 (4.7%) patient, and pneumonia in 2 (9.5%) patients. 33 (61.2%) patients died outside the hospital; the cause of death was stated as the underlying disease associated with acute decompensated heart failure: in 9 (27.2%) patients, dilated cardiomyopathy; in 1 (3.0%) patient, rheumatic mitral disease; and in 23 (69.7%) patients, ischemic cardiomyopathy. According to the univariate regression model, the risk of death in the long-term period was increased by the QT interval prolongation (U 2.41, p = 0.0161); elevated pulmonary artery systolic pressure (U 4.30, p=0.0000) and increased left atrial size according to echocardiography (U 2.98, p=0.0029); stage IIB HF (OR 2.41; 95% CI: 1.26-4.6), NYHA III-IV (OR 3.03; 95% CI: 1.58-5.81); chronic obstructive pulmonary disease (OR 5.24; 95% CI: 2.04-13.45); and lack of optimal drug therapy (ODT) for HF before ICD implantation (OR 2.41; 95% CI: 1.29-4.49). The multivariate analysis identified the most significant factors included in the prognostic regression model: pulmonary artery systolic pressure above 45 mm Hg, social status, chronic obstructive pulmonary disease, and lack of ODT for HF.
To ensure a maximum benefit from ICD, the factors that increase the likelihood of non-arrhythmic death should be considered before making a decision on ICD implantation. Particular attention should be paid to mandatory ODT for HF as the main modifiable risk factor for unfavorable prognosis.
Abstract
The anisotropic collective flow is one of the important observable values sensitive to transport properties of strongly interacting matter created in relativistic heavy-ion collisions. The ...performance of Multi-Purpose Detector (MPD) at NICA collider for elliptic flow measurements with Monte-Carlo simulations using collisions of Au+Au and Bi+Bi ions employing several state of the art event generators is studied. Different methods for flow measurements as event plane and direct cumulants are used to investigate the contribution of non-flow correlations and flow fluctuations.
The complex topology structure of the vacuum of quantum chromodynamics (QCD) can lead to local violation of the P CPinvariance of strong interactions. The preliminary estimations of magnetic field ...and correlators within the model of chiral magnetic effect are presented for types of nuclei and collision energies corresponded to RHIC and the LHC beams. These correlators characterized the asymmetry of the emission of charged particles with respect to the reaction plane in non-central nucleus-nucleus collisions are calculated for two various nuclear densities, namely, for approach of rigid sphere and for two-component Fermi model. The centrality dependence is under consideration for correlators integrated over other kinematic parameters. The correlator magnitudes depend on collision energy weakly for Cu + Cu and Au + Au collisions. The same-charge correlator shows noticeable increasing with growth of atomic number for symmetric collisions. Also magnetic field and centrality dependence of correlator are obtained for asymmetric Cu + Au collisions.
Near Infrared LED Based on PbS Nanocrystals Onishchuk, D. A.; Pavlyuk, A. S.; Parfenov, P. S. ...
Optics and spectroscopy,
11/2018, Letnik:
125, Številka:
5
Journal Article
Recenzirano
The principle of operation of near-infrared LEDs based on PbS nanocrystals and aspects of their development are considered. The aging of nanocrystals with different ligand shells is analyzed, as well ...as spectral transmission of the bottom LED layers. Samples of light-emitting diodes based on NC are demonstrated, their electrical and optical parameters are studied. The emission at a wavelength of 1480 nm is demonstrated.
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