B,V,I - photometry of 20 dwarf irregular galaxies within 10 Mpc

CCD - photometry is presented for 20 dIrr galaxies situated in the nearby complexes CenA/M83, and CVnI as well as in the general field of the Local Volume. We present integrated magnitudes of the galaxies in B,V,I - bands and also surface brightness profiles to a median isophote mu_B ~ 28 mag /sq.arcsec. The popular Sersic parameterization of surface brightness profiles generally does a poor job of simultaneously fitting the inner cores and outer exponential surface brightness fall-offs observed in many of our targets. The observed sample is a part of a general project to image about 500 nearby (D < 10 Mpc) dwarf galaxies in multiple bands.Comment: 3 figures, accepted to the MNRA

The frequency of detection of various forms of deforming bronchitis during endoscopic examination of patients with bleeding from the broncho-pulmonary system

237 patients were examined with bleeding from the broncho-pulmonary system. During the bronchoscopy, it was revealed that all patients suffered from deforming bronchitis of various forms: 73 (30.8%) patients had atrophic bronchitis, a primary inflammatory form; in 111 (46.8%) patients - primary dystrophic form of atrophic bronchitis; in 53 patients (22.4%) - diffuse, bilateral bronchitis of II and III degree of inflammation intensity. 237 patients were examined with bleeding from the broncho-pulmonary system. During the bronchoscopy, it was revealed that all patients suffered from deforming bronchitis of various forms: 73 (30.8%) patients had atrophic bronchitis, a primary inflammatory form; in 111 (46.8%) patients - primary dystrophic form of atrophic bronchitis; in 53 patients (22.4%) - diffuse, bilateral bronchitis of II and III degree of inflammation intensity

Psychophysiological methods and criteria for the selection of individual metered loads in athletes of taekwondo section

Purpose: scientific rationale approaches Express-diagnostics for athletes of taekwondo section by psychophysiological parameters. Material: Total surveyed 84 people, including 68 boys and 16 girls. Were defined backup capabilities, exercise tolerance and selection of adequate individual dose of loads in preparation for the international competition, participants - taekwondo athletes. Was attended by representatives of Ukraine, Russia and Lithuania. Age groups of participants: 6 - 16 years. Athletes have different levels and different schools of training. Results: evaluation of exercise tolerance and definition of an adequate level of motor mode in taekwondo athletes in terms of the difference of lability (DL) before and after training, revealed: high and very high nervous system (NS) lability. These figures correspond to high and very high tolerance to physical loads. The respondents who had difference of liability (DL) &lt;0, were well-trained athletes and their high points of strength of nervous system testified about good backup capabilities (withstand great and continuous loads). In 78 % of the tested load was chosen adequately. Less than 20% of the respondents noted the average backup capabilities. They need individual correction dose loads to increase adaptive capacity. Insignificant 10%, the share of respondents had low exercise tolerance at the average values NS strength, which indicates a good backup capabilities. The direct dependence: respondents with high levels on state of health, activity and mood - low levels of anxiety, frustration, aggression and rigidity. Conclusions The proposed optimized approach Express-diagnostics according to psychophysiological parameters allow you to determine the level of physical endurance, speed adaptation athletes in the sections taekwondo and adequate response to the loads

Orthologs of the small RPB8 subunit of the eukaryotic RNA polymerases are conserved in hyperthermophilic Crenarchaeota and "Korarchaeota"

Although most of the key components of the transcription apparatus, and in particular, RNA polymerase (RNAP) subunits, are conserved between archaea and eukaryotes, no archaeal homologs of the small RPB8 subunit of eukaryotic RNAP have been detected. We report that orthologs of RPB8 are encoded in all sequenced genomes of hyperthermophilic Crenarchaeota and a recently sequenced "korarchaeal" genome, but not in Euryarchaeota or the mesophilic crenarchaeon Cenarchaeum symbiosum. These findings suggest that all 12 core subunits of eukaryotic RNAPs were already present in the last common ancestor of the extant archaea

Practical Recommendations on Supplemental Feeding Introduction

Despite the availability of a national consensus document describing in detail modern approaches to feeding infants, pediatricians keep on giving most diverse recommendations on the time of supplemental feeding introduction. The article presents a brief historical review, as well the modern view on the issue of introduction of supplemental feeding to children. In the previous century, it was common both in Russia and most European countries to introduce supplemental feeding to children at the age of 2 or even 1.5 months. In 2002, the World Health Organization put forward an initiative in support of breastfeeding and recommended not to introduce supplemental feeding before the age of 6 months. A certain “golden mean” has apparently been achieved on the basis of results of studies and a longterm discussion among the specialists in feeding from different countries — all scientific communities and national recommendations of most countries define the optimal age for supplemental feeding introduction as “from 4 (completed) months to 6 (completed) months” with certain individual approach

The right hippocampus leads the bilateral integration of gamma-parsed lateralized information

It is unclear whether the two hippocampal lobes convey similar or different activities and how they cooperate. Spatial discrimination of electric fields in anesthetized rats allowed us to compare the pathway-specific field potentials corresponding to the gamma-paced CA3 output (CA1 Schaffer potentials) and CA3 somatic inhibition within and between sides. Bilateral excitatory Schaffer gamma waves are generally larger and lead from the right hemisphere with only moderate covariation of amplitude, and drive CA1 pyramidal units more strongly than unilateral waves. CA3 waves lock to the ipsilateral Schaffer potentials, although bilateral coherence was weak. Notably, Schaffer activity may run laterally, as seen after the disruption of the connecting pathways. Thus, asymmetric operations promote the entrainment of CA3-autonomous gamma oscillators bilaterally, synchronizing lateralized gamma strings to converge optimally on CA1 targets. The findings support the view that interhippocampal connections integrate different aspects of information that flow through the left and right lobes

Affiliative and communicative personal qualities and loneliness of university students

Introduction This article is dedicated to the study of affiliative and communicative personal qualities and experience of loneliness in of university students. The loneliness experience nature is associated with a variety of psychological characteristics of an individual. The affiliative and motivational phenomena that are often repeated over time also become stable psychological personal qualities. The study results are given in the text of this work. Methods Special psychological methods of information collection were used: questionnaire, H.Eysenck Personality Questionnaire, A.Mehrabian Affiliation Tendency Questionnaire (Rogov E.I., 1996, 529 p). Results Results of the study according to A.Mehrabian procedure found associations between the intensity of motives "desire for acceptance" (DA) and "fear of rejection" (FR), on the one hand, and the presence of both objective and subjective loneliness in students - on the other hand. Thus, in combination with data on extraversion and introversion, it can be concluded that the probability of being in a situation of loneliness or consider him/herself lonely exists for introverted types and students with a developed "fear of rejection" in interpersonal relations. Presence of correlation connections between indicators of extraversion and introversion and both affiliative motives is also a corresponding proof. Across the sample, the correlation coefficient r between individual indices DA and FR is 0.474, between extraversion and DA - 0.267, between extraversion and FR - 0.172. Existence of connections is expressed most clearly in the groups of students avoiding loneliness: 0.555, 0.298 and 0.242, respectively (all coefficients are statistically significant at the level of 0.01). DiscussionThese results indicate that the negative and positive experience of loneliness, which is expressed in the presence or absence of desire for its avoidance, as well as subjective definition of him/herself as a lonely or not lonely person, are associated with expression of a number of psychological characteristics of students' personality. Final report Loneliness is a phenomenon that is associated with human relationships and interaction resulting in some experience. The close communication relationship is one of the important criteria to prevent loneliness, but it does not play a decisive role in defining him/herself as a lonely person. The results of empirical study are of practical importance

First-Principles Study of Substitutional Metal Impurities in Graphene: Structural, Electronic and Magnetic Properties

We present a theoretical study using density functional calculations of the structural, electronic and magnetic properties of 3d transition metal, noble metal and Zn atoms interacting with carbon monovacancies in graphene. We pay special attention to the electronic and magnetic properties of these substitutional impurities and found that they can be fully understood using a simple model based on the hybridization between the states of the metal atom, particularly the d shell, and the defect levels associated with an unreconstructed D3h carbon vacancy. We identify three different regimes associated with the occupation of different carbon-metal hybridized electronic levels: (i) bonding states are completely filled for Sc and Ti, and these impurities are non-magnetic; (ii) the non-bonding d shell is partially occupied for V, Cr and Mn and, correspondingly, these impurties present large and localized spin moments; (iii) antibonding states with increasing carbon character are progressively filled for Co, Ni, the noble metals and Zn. The spin moments of these impurities oscillate between 0 and 1 Bohr magnetons and are increasingly delocalized. The substitutional Zn suffers a Jahn-Teller-like distortion from the C3v symmetry and, as a consequence, has a zero spin moment. Fe occupies a distinct position at the border between regimes (ii) and (iii) and shows a more complex behavior: while is non-magnetic at the level of GGA calculations, its spin moment can be switched on using GGA+U calculations with moderate values of the U parameter.Comment: 13 figures, 4 tables. Submitted to Phys. Rev. B on September 26th, 200

Manifestation of finite temperature size effects in nanogranular magnetic graphite

In addition to the double phase transition (with the Curie temperatures T_C=300K and T_{Ct}=144K), a low-temperature anomaly in the dependence of the magnetization is observed in the bulk magnetic graphite (with an average granular size of L=10nm), which is attributed to manifestation of the size effects below the quantum temperature. The best fits of the high-temperature data (using the mean-field Curie-Weiss and Bloch expressions) produced reasonable estimates for the model parameters, such as defects mediated effective spin exchange energy J=12meV (which defines the intragranular Curie temperature T_C) and proximity mediated interactions between neighboring grains (through potential barriers created by thin layers of non-magnetic graphite) with energy J_t=exp(-d/s)J=5.8meV (which defines the intergranular Curie temperature T_{Ct}) with d=1.5nm and s=2nm being the intergranular distance and characteristic length, respectively