165 research outputs found

    ACQUISITION AND MODELING OF A SPECTRUM IN A NON THERMAL EQUILIBRIUM PLASMA FORMED IN AIR WITH WATER

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    Spectra in the range of 365-385 nm, corresponding to the Schumann-Runge system of O2 (B33u - X33-g) and to the second positive system of N2 (C30u - B30g) are measured by optical emission spectroscopy in a discharge with liquid non-metallic electrodes (DLNME) in air with water at atmospheric pressure. They are simulated theoretically. This discharge generates a non-equilibrium plasma. In this paper, we first describe the experimental set up. Then, we explain the method of spectra simulation. By comparison of measured and simulated spectra, we determine the rotational and vibrational temperature and the ratio between densities of two upper electronic quantum levels of the two considered systems. The possible mechanism of spectra formation is discussed

    Combination treatment for tunnel neuropathies of the lower extremities

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    The paper discusses the general problems of the pathogenesis of tunnel neuropathies of the lower extremities with the endogenous and exogenous etiological factors being indicated. The clinical manifestations of tunnel neuropathies at this site are considered in detail. Various leg tunnel syndromes are characterized. Diagnostic and treatment methods for the above syndromes are considered

    IMMUNOLOGIC MARKER OF INTRANATAL INFECTIONS

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    The results of the research established determination of immunologic marker for prognosis of intranatal infection. The authors performed a comparative study of the immunity values of women in a risk group for prenatal infection. As it was shown when prenatal infection develops, there is an increase in the content of proinflammatory cytokines in the pregnant woman serum and activation of the ingestion rate. Account the results to devise an algorithm the pregnant woman care

    Strongly localized polaritons in an array of trapped two-level atoms interacting with a light field

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    We propose a new type of spatially periodic structure, i.e. polaritonic crystal (PolC), to observe a "slow"/"stopped" light phenomenon due to coupled atom-field states (polaritons) in a lattice. Under the tightbinding approximation, such a system realizes an array of weakly coupled trapped two-component atomic ensembles interacting with optical field in a tunnel-coupled one dimensional cavity array. We have shown that the phase transition to the superfluid Bardeen-Cooper-Schrieffer state, a so-called (BCS)-type state of low branch polaritons, occurs under the strong coupling condition. Such a transition results in the appearance of a macroscopic polarization of the atomic medium at non-zero frequency. The principal result is that the group velocity of polaritons depends essentially on the order parameter of the system, i.e. on the average photon number in the cavity array.Comment: 16 pages, 6 figure

    Anomalous exponents in the rapid-change model of the passive scalar advection in the order ϵ3\epsilon^{3}

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    Field theoretic renormalization group is applied to the Kraichnan model of a passive scalar advected by the Gaussian velocity field with the covariance <v(t,x)v(t,x)>δ(tt)xxϵ - <{\bf v}(t,{\bf x}){\bf v}(t',{\bf x'})> \propto\delta(t-t')|{\bf x}-{\bf x'} |^{\epsilon}. Inertial-range anomalous exponents, related to the scaling dimensions of tensor composite operators built of the scalar gradients, are calculated to the order ϵ3\epsilon^{3} of the ϵ\epsilon expansion. The nature and the convergence of the ϵ\epsilon expansion in the models of turbulence is are briefly discussed.Comment: 4 pages; REVTeX source with 3 postscript figure

    Characterization of Pathogenic Microflora Causing Suppurative Septic Postpartum Complications: a Retrospective Cohort Study

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    Background. Suppurative septic postpartum complications occupy a leading position in the structure of causes of maternal mortality. Information about the characteristics of pathogenic microflora in various forms of complications and analysis of its resistance to antibacterial drugs determine the choice of rational therapy for this pathology.Objectives — to characterize the isolated pathogenic microflora in obstetric patients with suppurative septic postpartum complications.Methods. A retrospective cohort study was conducted at the Department of Obstetrics and Gynecology No. 2 of the Omsk State Medical University and the Department of Gynecology of the Omsk Regional Clinical Hospital. The study included 123 cesarean section patients treated from January 2013 to December 2022 who were divided into three groups: Group A — uncomplicated course of postpartum endometritis, n = 55; Group B — complicated forms of postpartum endometritis, n = 48: B1 — local complications (suture failure following cesarean section; parametritis) n = 29; B2 — pelvic peritonitis, n = 19; Group C — septic complications following critical obstetric conditions, n = 20. The pathogenic microflora of uterine and abdominal cavities was examined; the extent of contamination with a pathogen and sensitivity to antibacterial drugs were determined. The isolated microorganisms were identified using a MicroTax bacteriological analyzer (Austria), Vitek2 Compact (France) and routine methods; a disk diffusion method was employed to determine the sensitivity of microorganisms to antibacterial drugs. Calculations were performed using licensed Microsoft Office Excel 2013 and Statistica 10 programs (StatSoft Inc., USA). Nonparametric nominal data were compared using Pearson’s chi-squared test with p-value determination.Results. The pathogenic microflora was dominated by S. epidermidis, E. faecalis, E. coli, and E. faecium. In 2018–2022, a statistically significant decrease was observed in the isolation rate of S. epidermidis (p = 0.016), E. faecalis (p &lt; 0.001), and E. faecium (p = 0.05). The highest resistance was exhibited by bacteria to the following antibiotics: S. epidermidis — cephalosporins (30.16%); E. faecalis — fluoroquinolones (33.33%); E. coli — cephalosporins (65.91%) and β-lactamase-resistant penicillins (40.91%); E. faecium — aminopenicillins (64.10%) and fluoroquinolones (50.0%); А. baumannii — fluoroquinolones, cephalosporins, carbapenems (100%), and aminoglycosides (84.2%). A contamination assessment revealed a high titer of isolated microorganisms in 60.53% of cases. We found a statistically significantly higher isolation rate of S. еpidermidis (p &lt; 0.001), E. faecium (p = 0.01), and A. baumannii (p = 0.02) in the setting of pelvic peritonitis as compared to uncomplicated endometritis. In the case of suppurative septic complications due to critical obstetric conditions, the isolation rate was higher for S. еpidermidis (p &lt;0.001), E. coli (p = 0.04), E. faecium (p = 0.005), A. baumannii (р&lt;0.001), and K. рneumoniae (p = 0.04).Conclusion. The antibiotic resistance of pathogenic microorganisms calls for the development of new organ system support technologies and the use of methods capable of sorbing microorganisms and their toxins in the area of inflammation

    Calculation of the anomalous exponents in the rapid-change model of passive scalar advection to order ε3\varepsilon^{3}

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    The field theoretic renormalization group and operator product expansion are applied to the model of a passive scalar advected by the Gaussian velocity field with zero mean and correlation function \propto\delta(t-t')/k^{d+\eps}. Inertial-range anomalous exponents, identified with the critical dimensions of various scalar and tensor composite operators constructed of the scalar gradients, are calculated within the ε\varepsilon expansion to order ε3\varepsilon^{3} (three-loop approximation), including the exponents in anisotropic sectors. The main goal of the paper is to give the complete derivation of this third-order result, and to present and explain in detail the corresponding calculational techniques. The character and convergence properties of the ε\varepsilon expansion are discussed; the improved ``inverse'' ε\varepsilon expansion is proposed and the comparison with the existing nonperturbative results is given.Comment: 34 pages, 5 figures, REVTe

    Results from the Baksan Experiment on Sterile Transitions (BEST)

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    The Baksan Experiment on Sterile Transitions (BEST) was designed to investigate the deficit of electron neutrinos, νe\nu_{e}, observed in previous gallium-based radiochemical measurements with high-intensity neutrino sources, commonly referred to as the \textit{gallium anomaly}, which could be interpreted as evidence for oscillations between νe\nu_e and sterile neutrino (νs\nu_s) states. A 3.414-MCi \nuc{51}{Cr} νe\nu_e source was placed at the center of two nested Ga volumes and measurements were made of the production of \nuc{71}{Ge} through the charged current reaction, \nuc{71}{Ga}(νe\nu_e,e^-)\nuc{71}{Ge}, at two average distances. The measured production rates for the inner and the outer targets respectively are (54.9^{+2.5}_{-2.4}(\mbox{stat})\pm1.4 (\mbox{syst})) and (55.6^{+2.7}_{-2.6}(\mbox{stat})\pm1.4 (\mbox{syst})) atoms of \nuc{71}{Ge}/d. The ratio (RR) of the measured rate of \nuc{71}{Ge} production at each distance to the expected rate from the known cross section and experimental efficiencies are Rin=0.79±0.05R_{in}=0.79\pm0.05 and Rout=0.77±0.05R_{out}= 0.77\pm0.05. The ratio of the outer to the inner result is 0.97±\pm0.07, which is consistent with unity within uncertainty. The rates at each distance were found to be similar, but 20-24\% lower than expected, thus reaffirming the anomaly. These results are consistent with νeνs\nu_e \rightarrow \nu_s oscillations with a relatively large Δm2\Delta m^2 (>>0.5 eV2^2) and mixing sin22θ^2 2\theta (\approx0.4).Comment: Paper updated to final versio
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