Star Formation in Nearby Isolated Galaxies

We use the FUV fluxes measured with the GALEX to study the star formation properties of galaxies collected in the "Local Orphan Galaxies" catalog (LOG). Among 517 LOG galaxies having radial velocities V(LG) < 3500 km/s and Galactic latitudes |b|> 15 degr, 428 objects have been detected in FUV. We briefly discuss some scaling relations between the specific star formation rate (SSFR) and stellar mass, HI-mass, morphology, and surface brightness of galaxies situated in extremely low density regions of the Local Supercluster. Our sample is populated with predominantly late-type, gas-rich objects with the median morphological type of Sdm. Only 5% of LOG galaxies are classified as early types: E, S0, S0/a, however, they systematically differ from normal E and S0 galaxies by lower luminosity and presence of gas and dust. We find that almost all galaxies in our sample have their SSFR below 0.4 [Gyr^{-1}]. This limit is also true even for a sample of 260 active star-burst Markarian galaxies situated in the same volume. The existence of such a quasi-Eddington limit for galaxies seems to be a key factor which characterizes the transformation of gas into stars at the current epoch.Comment: 10 pages, 8 figures, 3 table

Post-mortem interval estimation by short-wave laser-induced fluorescence of polycrystalline cerebrospinal fluid films images

Considerable difficulties of accurate post-mortem interval (PMI) estimation are related to impact of large number of both external and internal factors on posthumous processes development, that is why PMI estimation is one of the main problems in forensic practice. There are many new optical polarimetric methods of biological tissue structure assessment, which ones are the most perspective in PMI estimation. The purpose of the work is to develop and to test the method of two-dimensional Stokes-polarimetric mapping of biological layers autofluorescence for PMI estimation by statistical analysis of postmortem changes dynamics of the coordinate distributions values of polycrystalline films of liquor (PFL) images laser-induced fluorescence polarization intensity

X-ray AGN in the XMM-LSS galaxy clusters: no evidence of AGN suppression

We present a study of the overdensity of X-ray selected AGN in 33 galaxy clusters in the XMM-LSS field, up to redhift z=1.05. Previous studies have shown that the presence of X-ray selected AGN in rich galaxy clusters is suppressed. In the current study we investigate the occurrence of X-ray selected AGN in low and moderate X-ray luminosity galaxy clusters. Due to the wide contiguous XMM-LSS survey area we are able to extend the study to the cluster outskirts. We therefore determine the projected overdensity of X-ray point-like sources out to 6r_{500} radius. To provide robust statistical results we also use a stacking analysis of the cluster projected overdensities. We investigate whether the observed X-ray overdensities are to be expected by estimating also the corresponding optical galaxy overdensities. We find a positive X-ray projected overdensity at the first radial bin, which is however of the same amplitude as that of optical galaxies. Therefore, no suppression of X-ray AGN activity with respect to the field is found, implying that the mechanisms responsible for the suppression are not so effective in lower density environments. After a drop to roughly the background level between 2 and 3r_{500}, the X-ray overdensity exhibits a rise at larger radii, significantly larger than the corresponding optical overdensity. Finally, using redshift information of all optical counterparts, we derive the spatial overdensity profile of the clusters. We find that the agreement between X-ray and optical overdensities in the first radial bin is also suggested in the 3-dimensional analysis. However, we argue that the X-ray overdensity "bump" at larger radial distance is probably a result of flux boosting by gravitational lensing of background QSOs. For high redshift clusters an enhancement of X-ray AGN activity in their outskirts is still possible.Comment: 16 pages. Accepted for publication in A&

Machine learning technique for morphological classification of galaxies at z<0.1 from the SDSS

Methods. We used different galaxy classification techniques: human labeling, multi-photometry diagrams, Naive Bayes, Logistic Regression, Support Vector Machine, Random Forest, k-Nearest Neighbors, and k-fold validation. Results. We present results of a binary automated morphological classification of galaxies conducted by human labeling, multiphotometry, and supervised Machine Learning methods. We applied its to the sample of galaxies from the SDSS DR9 with redshifts of 0.02 < z < 0.1 and absolute stellar magnitudes of 24m < Mr < 19.4m. To study the classifier, we used absolute magnitudes: Mu, Mg, Mr , Mi, Mz, Mu-Mr , Mg-Mi, Mu-Mg, Mr-Mz, and inverse concentration index to the center R50/R90. Using the Support vector machine classifier and the data on color indices, absolute magnitudes, inverse concentration index of galaxies with visual morphological types, we were able to classify 316 031 galaxies from the SDSS DR9 with unknown morphological types. Conclusions. The methods of Support Vector Machine and Random Forest with Scikit-learn machine learning in Python provide the highest accuracy for the binary galaxy morphological classification: 96.4% correctly classified (96.1% early E and 96.9% late L types) and 95.5% correctly classified (96.7% early E and 92.8% late L types), respectively. Applying the Support Vector Machine for the sample of 316 031 galaxies from the SDSS DR9 at z < 0.1, we found 141 211 E and 174 820 L types among them.Comment: 10 pages, 5 figures. The presentation of these results was given during the EWASS-2017, Symposium "Astroinformatics: From Big Data to Understanding the Universe at Large". It is vailable through \url{http://space.asu.cas.cz/~ewass17-soc/Presentations/S14/Dobrycheva_987.pdf

On the quasi-primary decomposition of HK-torsion theories

The paper is devoted to the study of quasi-primary decompositions of torsion theories in the rings which derivatives. It is shown that every HK-torsion theory of the differential noetherian completely bounded ring it is an intersection of finite number of quasi-primary HK-torsion theories

Catalog of Isolated Galaxies Selected from the 2MASS Survey

We search for isolated galaxies based on the automatic identification of isolated sources from the Two Micron All-Sky Survey (2MASS) followed by a visual inspection of their surroundings. We use the modified Karachentseva criterion to compile a catalog of 3227 isolated galaxies (2MIG), which contains 6% of 2MASS Extended Sources Catalog (or 2MASX) sources brighter than Ks = 12 mag with angular diameters a_K > 30 arcsec. The catalog covers the entire sky and has an effective depth of z = 0.02. The 2493 very isolated objects of the catalog, which we include into the 2MVIG catalog, can be used as a reference sample to investigate the effects of the environment on the structure and evolution of galaxies located in regions with extremely low density of matter.Comment: 19 pages, 13 figure

Психолого-педагогічні механізми формування мовленнєвої компетентності у дітей старшого дошкільного віку

Розвиток зв’язного мовлення в дошкільному віці відбувається паралельно з формуванням розумової діяльності, збагаченням життєвого, емоційного та мовленнєвого досвіду, ускладненням форм спілкування. У другій половині третього року життя науковці відзначають наявність „якісного стрибка”. Саме в цей період спостерігаються перші випадки мовленнєвих висловлювань, які свідчать про те, що мовлення малюка вже може бути позаситуативним та позаконтекстним

НАВЧАЛЬНО-МЕТОДИЧНЕ ЗАБЕЗПЕЧЕННЯ ПІДГОТОВКИ СТУДЕНТІВ У ВИЩИХ НАВЧАЛЬНИХ ЗАКЛАДАХ МОЗ УКРАЇНИ: СТАН ТА ПЕРШОЧЕРГОВІ ЗАВДАННЯ

The status of educational and methodological support of students’ training in higher education institutions of the Ministry of Health of Ukraine is covered in details in the article, a comprehensive assessment of its compliance with the requirements for carrying out educational activities in higher education is made and, according to this analysis, the emerging priorities for improving educational and methodological support of students’ training in higher education institutions of the Ministry of Health of Ukraine are forming.У статті детально висвітлюється стан навчально-методичного забезпечення підготовки студентів у вищих навчальних закладах МОЗ України, дається комплексна оцінка його відповідності вимогам щодо провадження освітньої діяльності у сфері вищої освіти та, згідно даного аналізу, формуються першочергові завдання щодо удосконалення навчально-методичного забезпечення студентів у ВНЗ МОЗ України

Oncological standards in the treatment of diffuse inflammatory diseases of the colon

Aim. To improve the effectiveness of cancer prevention and the results of surgical treatment in diffuse inflammatory diseases of the colon by identifying and using risk factors for malignancy, improving diagnostic methods, surgical strategy and tactics. Materials and methods. Using generally accepted oncological standards, 36 patients with diffuse inflammatory diseases of the colon were operated on. There were 20 (55.6 %) patients with ulcerative colitis and 16 (44.4 %) with Crohn’s disease of the colon. There were 19 (52.7 %) men and 17 (47.3 %) women. The patients’ age ranged from 21 to 56 years. When performing surgical interventions, we were guided by the studied risk factors for malignancy, the provisions of the surgical strategy and tactics, that included the indication choice, the surgical intervention extent, and the ensuring of oncoprevention. Results. The use of oncological standards, provisions of surgical strategy and tactics prevented the occurrence of postoperative mortality, malignancy of precancerous conditions, contributed to a decrease in the incidence of early postoperative complications to 5 (13.9 %), locoregional recurrence to 1 (2.8 %). Conclusions. Determination of risk factors for malignancy, improvement of diagnostic methods, surgical strategy and tactics in diffuse inflammatory diseases of the colon contribute to the timely detection of precancerous conditions, malignancy and colon cancer, justification for the feasibility of performing surgical interventions using generally accepted oncological standards. Performing surgical interventions with the use of generally accepted oncological standards, proven provisions of strategy and tactics have made it possible to prevent the occurrence of malignization of precancerous conditions, cases of postoperative mortality, reduce the frequency of early postoperative complications to 5 (13.9 %) and locoregional recurrences to 1 (2.8 %)