1,259 research outputs found
Observation of polarization quantum noise of laser radiation in Rb vapor cell
We present experimental study of polarization quantum noise of laser
radiation passed through optically think vapor of Rb87. We observe a step-like
noise spectrum. We discuss various factor which may result in such noise
spectrum and prevent observation of squeezing of quantum fluctuations predicted
in Matsko et al. PRA 63, 043814 (2001).Comment: 4 pages, 5 figures. Translated from Russian by I. Novikov
Radiation trapping in coherent media
We show that the effective decay rate of Zeeman coherence, generated in a
Rb87 vapor by linearly polarized laser light, increases significantly with the
atomic density. We explain this phenomenon as the result of radiation trapping.
Our study shows that radiation trapping must be taken into account to fully
understand many electromagnetically induced transparency experiments with
optically thick media
Enhancement of Kerr nonlinearity via multi-photon coherence
We propose a new method of resonant enhancement of optical Kerr nonlinearity
using multi-level atomic coherence. The enhancement is accompanied by
suppression of the other linear and nonlinear susceptibility terms of the
medium. We show that the effect results in a modification of the nonlinear
Faraday rotation of light propagating in an Rb87 vapor cell by changing the
ellipticity of the light.Comment: 4 pages, 3 figures Submitted to Optics Letter
Treatment of adolescent girls with abnormal uterine bleeding taking into account psychoemotional and vegetative status
Tuchkina I. A., Tuchkina M. Yu., Novikova A. A. Treatment of adolescent girls with abnormal uterine bleeding taking into account psychoemotional and vegetative status. Journal of Education, Health and Sport. 2019;9(5):575-582. eISNN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.3239459
http://ojs.ukw.edu.pl/index.php/johs/article/view/7001
The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 1223 (26/01/2017).
1223 Journal of Education, Health and Sport eISSN 2391-8306 7
© The Authors 2019;
This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author (s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non commercial license Share alike.
(http://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 29.04.2019. Revised: 15.05.2019. Accepted: 31.05.2019.
TREATMENT OF ADOLESCENT GIRLS WITH ABNORMAL UTERINE BLEEDING TAKING INTO ACCOUNT PSYCHOEMOTIONAL AND VEGETATIVE STATUS
I. A. Tuchkina, M. Yu. Tuchkina, A. A. Novikova
Kharkiv National Medical University
Department of Obstetrics, Gynecology and Pediatric Gynecology
Abstract
The study, which was conducted at the clinical bases of the Department of Obstetrics, Gynecology and Pediatric Gynecology of the Kharkov National Medical University for 2 years, included 98 adolescent girls with abnormal uterine bleeding during puberty (AUBDP) 11-18 years old.
A comprehensive clinical and laboratory examination included an analysis of complaints and the clinical course of the disease, a study of early history with an assessment of the infectious index, the course of pregnancy and labor in mothers, the degree of physical and sexual development, the characteristic of menstrual function, gynecological status, ovarian function. Also were studied urine and bacteriological seeding from the vagina, coagulogram, hormonal profile and ultrasound. The psychoemotional state of adolescents was studied using techniques adapted to their age.
When treating 30 adolescent girls with AUBDP (I group), we used conservative therapy. Hormonal treatment was carried out according to strict indications of 18 adolescent girls with AUBDP (group II), with the ineffectiveness of symptomatic therapy. 50 patients with AUBDP (group III) received therapy, including medicines that contains indole-3-carbinol tranexamic acid and received physiotherapy.
The established causes of bleeding, identified during the history taking, were stressful situations - 36.7%, increased physical and mental stress - 15.3%, acute and chronic respiratory and viral diseases - 12.2%.
Differential use of the developed complexes of adequate therapy, taking into account the level of anxiety of patients with AUBDP, according to the indications was effective in most patients. The inclusion of physiotherapeutic treatment in therapeutic regimens helped to reduce the medicine load on the developing organism of adolescent girls. In most patients, there was an improvement in the characteristics of psychoemotional status; positive dynamics of the progress of the puberty period, normalization of menstrual function were observed.
From this point of view, the active use of modern clinical diagnostic and new medical complexes using effective treatment schemes for correcting pathological conditions in adolescence is promising.
Key words: abnormal uterine bleeding, adolescent girls, stress, physiotherapy
Large negative and positive delay of optical pulses in coherently prepared dense Rb vapor with buffer gas
We experimentally study the group time delay for a light pulse propagating
through hot Rb vapor in the presence of a strong coupling field in a
configuration. We demonstrate that the ultra-slow pulse propagation is
transformed into superluminal propagation as the one-photon detuning of the
light increases due to the change in the transmission resonance lineshape.
Negative group velocity as low as -c/10^6=-80 m/s is recorded. We also find
that the advance time in the regime of the superluminal propagation grows
linearly with increasing laser field power.Comment: 5 pages, 6 figure
Scenarios of increasing the economic efficiency of the Kaliningrad regional transport system
The development of the considerable transport and logistics potential of the Kaliningrad region is hampered by several factors. This problem, to which we will refer to as a transport deadlock effect, translates into the limited contribution of transport to the regional economy. Particularly, it manifests itself at the level of regional gross value added, where the contribution of transport is much smaller than one might expect given the significant role the industry plays in the economy of the region. In this study, we examine major ways of increasing the economic efficiency of the regional transport system from the value added perspective. We posit that the structure of cargo handled and the redistribution of value added in favour of regional actors have the dominant influence on economic efficiency. Using our own simulation model and the earlier developed system of transport tariffs and value added calculation for the Kaliningrad region, we produce scenarios and consider changes in value added in the case of selected cargoes carrying intermediate, investment, and consumer goods (as defined in the International Classification for Broad Economic Categories ICT BEC-4). Our calculations show that higher value added and greater economic efficiency of a regional transport system are associated with re-orientation towards investment and consumer goods. The most visible effect is associated with rail and road transport. As to sea transport, the decisive role is played by an increase in the physical volume of cargo handled. The results of this study and its modelling tools can be applied in the analysis of the current situation and in the assessment of the efficiency of transport systems in other regions. Another possible application is the identification of growth conditions for an industry, particularly, when developing projects and proposals for increasing the efficiency of transport services
Temperature dependence of the electron spin g factor in GaAs
The temperature dependence of the electron spin factor in GaAs is
investigated experimentally and theoretically. Experimentally, the factor
was measured using time-resolved Faraday rotation due to Larmor precession of
electron spins in the temperature range between 4.5 K and 190 K. The experiment
shows an almost linear increase of the value with the temperature. This
result is in good agreement with other measurements based on photoluminescence
quantum beats and time-resolved Kerr rotation up to room temperature. The
experimental data are described theoretically taking into account a diminishing
fundamental energy gap in GaAs due to lattice thermal dilatation and
nonparabolicity of the conduction band calculated using a five-level kp model.
At higher temperatures electrons populate higher Landau levels and the average
factor is obtained from a summation over many levels. A very good
description of the experimental data is obtained indicating that the observed
increase of the spin factor with the temperature is predominantly due to
band's nonparabolicity.Comment: 6 pages 4 figure
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