Heuristic environment as condition of art criticism competence development for future teachers

Essential factor of professionally significant competences development of future art direction teachers is the educational environment as which it is necessary to understand the integrity of pedagogical conditions, interactions, processes, components of pedagogical process which is specially organized for achievement of the educational purposes. Results of a theoretical research which purpose was studying characteristics of the heuristic environment as conditions of development of competences of future art direction teachers are presented in article. The main intrinsic characteristic of the heuristic educational environment is the following: recognition of value of creative activity of subjects of educational process; implementation of stimulation, support and encouragement of creative activity of students; granting opportunities for inclusion in creative activity. The empirical research was directed to studying influence of specially organized heuristic educational environment on development of art criticism competence of future art direction teachers. Testing, observation, method of expert evaluations of results of creative activity were used by us for realization of a pedagogical experiment. The conducted research allowed to reveal that specially organized heuristic environment promotes high-quality development of art criticism competence which is shown in the following: future art direction teachers acquire culturological and art criticism contents at the levels above an average and high; barriers to transition to creative activity in the field of art criticism are broken; personalization of development of art criticism competence is carried out. Keywords: educational environment, heuristics, heuristic environment, art criticism competenc

Surgical management of ovarian dermoid cysts in children and adolescents

Department of Obstetrics and Gynecology, Medical University “N. Testemitsanu”, Kishinev, MoldovaIntroduction: The ovarian dermoid cysts are one of the most common neoplastic ovarian injuries found both in children and teenagers. For the girls with small ovarian diseases organ preserving operation it's extremely important for a proper functioning of puberty and future fertility. Purpose and Objectives: The aim of study was to present the reasons for making these surgeries in all the cases of ovarian dermoid cysts in order to ensure fertility and menstruation every month. Methods and materials: A prospective and retrospective analysis of all the ovarian cysts both in children and teenagers aged between 8 and 18, from the year 2000 through 2012 admitted in the Institute of Mother and Child Care, the department of operative gynecology was performed. Results: The ovarian dermoid cysts were localized mostly in the right side having a percentage of 64.7 vs. 35.3 for the left side. Cysts outermost dimension were 79.6±7.2 mm (95% CI:64.30-94.82) and minimum were - 65.1±6.5 mm (95% C l:51.21 -79.04), from 56 to 156 mm. Laparatomy was the surgery that was mostly used - 14/17 (82.4%), and laparoscopy was done only in 3/17 (17.6% ) cases. All of the organ preserving operations were statistically more common (p<0.001) over ovariectomy and were 14/17 (82.4%) vs. 3/17 (17.6%). Conclusions: It is vital to have a proper surgical approach for all the children and teenagers with ovarian cysts for maintaining a good sexual growth and fertility in the near future. These surgeries are the best method for this group of patient

Quantum memory for light via stimulated off-resonant Raman process: beyond the three-level Lambda-scheme approximation

We consider a quantum memory scheme based on the conversion of a signal pulse into a long-lived spin coherence via stimulated off-resonant Raman process. For a storing medium consisting of alkali atoms, we have calculated the Autler-Townes resonance structure created by a strong control field. By taking into account the upper hyperfine states of the D1 optical transition, we show important deviations from the predictions of the usual three-level Lambda-scheme approximation and we demonstrate an enhancement of the process for particular detunings of the control. We estimate the memory efficiency one can obtain using this configuration.Comment: 8 pages, 6 figure

High frequency polarization switching of a thin ferroelectric film

We consider both experimentally and analytically the transient oscillatory process that arises when a rapid change in voltage is applied to a $Ba_xSr_{1-x}TiO_3$ ferroelectric thin film deposited on an $Mg0$ substrate. High frequency ($\approx 10^{8} rad/s$) polarization oscillations are observed in the ferroelectric sample. These can be understood using a simple field-polarization model. In particular we obtain analytic expressions for the oscillation frequency and the decay time of the polarization fluctuation in terms of the material parameters. These estimations agree well with the experimental results

Optical second harmonic generation probe of two-dimensional ferroelectricity

Optical second harmonic generation (SHG) is used as a noninvasive probe of two-dimensional (2D) ferroelectricity in Langmuir-Blodgett (LB) films of copolymer vinylidene fluoride with trifluorethylene. The surface 2D ferroelectric-paraelectric phase transition in the topmost layer of LB films and a thickness independent (almost 2D) transition in the bulk of these films are observed in temperature studies of SHG.Comment: 9 pages, 2 figures, Optics Letters, in prin

Electromagnetically induced transparency in inhomogeneously broadened Lambda-transition with multiple excited levels

Electromagnetically induced transparency (EIT) has mainly been modelled for three-level systems. In particular, a considerable interest has been dedicated to the Lambda-configuration, with two ground states and one excited state. However, in the alkali-metal atoms, which are commonly used, hyperfine interaction in the excited state introduces several levels which simultaneously participate in the scattering process. When the Doppler broadening is comparable with the hyperfine splitting in the upper state, the three-level Lambda model does not reproduce the experimental results. Here we theoretically investigate the EIT in a hot vapor of alkali-metal atoms and demonstrate that it can be strongly reduced due to the presence of multiple excited levels. Given this model, we also show that a well-designed optical pumping enables to significantly recover the transparency