Study of High Energy Gamma-Quanta Beyond the Atmosphere

Measurements of primary cosmic radiation gamma quanta from Proton I and II satellite

Распространенность избыточной дневной сонливости в Российской Федерации

Background. Excessive daytime sleepiness is a very important symptom of a wide range of pathological conditions and has a significant impact on both the individual patient and the society as a whole. Estimation of the prevalence of excessive daytime sleepiness, identifying the cause, and also its elimination is an important socio-economic task.Objective to estimate the prevalence of excessive daytime sleepiness in the population of the Russian Federation according to the Internet survey data and the distribution of the estimate of the daytime sleepiness by age and body mass index.Materials and methods. One-time study according to the Internet survey data on the Epworth drowsiness scale (ESS).Results. Excessive daytime sleepiness (more than 10 points on the ESS scale) was observed in 40,9% of respondents.Conclusion. According to the results of the study, excessive daytime sleepiness is widespread in the Russian Federation, which speaks of its socio-economic significance, the need for measures to identify its causes and their elimination.Введение. Избыточная дневная сонливость является очень важным симптомом широкого спектра патологических состояний и оказывает существенное воздействие как на самого человека, так и на социум в целом. Оценка распространенности избыточной дневной сонливости, выявление причины, а также ее устранение является важной социально-экономической задачей.Цель исследования – оценить распространенность избыточной дневной сонливости в популяции Российской Федерации с помощью интернет-опроса, а также оценить распределение показателей дневной сонливости по возрасту и индексу массы тела.Материалы и методы. Одномоментное исследование по шкале сонливости Эпворта (ESS) при помощи интернет-опроса.Результаты. Избыточная дневная сонливость (>10 баллов по шкале ESS) отмечена у 40,9 % респондентов.Заключение. По результатам проведенного исследования избыточная дневная сонливость имеет широкую распространенность в Российской Федерации, что говорит об ее социально-экономической значимости, необходимости мер по выявлению причин данного состояния и их устранению

Experimental study of the vidicon system for information recording using the wide-gap spark chamber of gamma - telescope gamma-I

The development of the gamma ray telescope is investigated. The wide gap spark chambers, used to identify the gamma quanta and to determine the directions of their arrival, are examined. Two systems of information recording with the spark chambers photographic and vidicon system are compared

The gamma-ray telescope Gamma-1

French and Soviet specialists have designed and built the gamma-ray telescope GAMMA-1 to detect cosmic gamma rays above 50 MeV. The sensitive area of the detector is 1400 sq cm, energy resolution is 30% at 300 MeV, and angular resolution 1.2 deg at 300 MeV (and less than 20' arc when a coded aperture mask is used). Results on calibration of the qualification model and Monte-Carlo calculations are presented

Воспалительные заболевания кишечника, сопровождающиеся анемией, как фактор риска развития синдрома беспокойных ног. Обзор литературы

Restless legs syndrome (RLS) is a neurological, sensorimotor disorder. It is characterized by the uncomfortable and unpleasant sensations in the legs which begin or worsen during periods of rest, primarily in the evening or night, and are relieved by movement. Central iron deficiency plays a vital role in the pathogenesis of RLS. There is evidence that chronic inflammation is an additional risk factor for RLS. Anemia is the most common complication and extraintestinal manifestation of inflammatory bowel disease, therefore the prevalence of RLS in these patients is a problem of great interest. In addition, inflammatory bowel disease patients’ sleep disturbances directly influence the disease’s clinical course and can be the preclinical marker of exacerbation. It is essential for clinicians to be aware of RLS as a possible reason for sleep disturbance and as a factor that negatively affects the quality of life in inflammatory bowel disease patients.Синдром беспокойных ног (СБН) – это неврологическое сенсомоторное заболевание, характеризующееся неприятными ощущениями в нижних конечностях, которые возникают преимущественно в покое, в вечернее или ночное время суток и облегчаются при движении. Важную роль в патогенезе СБН играет дефицит железа в центральной нервной системе. Есть данные о том, что фактором риска развития СБН также является хроническое воспаление. Анемия – самое частое осложнение и внекишечное проявление воспалительных заболеваний кишечника, поэтому вопрос распространенности СБН у данной группы пациентов представляет особый интерес. При этом нарушения сна у пациентов с воспалительными заболеваниями кишечника влияют на течение основного заболевания и могут являться доклиническими маркерами обострения. Необходимо помнить о СБН как о возможной причине нарушения сна и снижения качества жизни у данной группы пациентов

Синдром беспокойных ног: патогенез, диагностика, лечение. Обзор литературы

Restless leg syndrome (RLS) is a chronic sensory‑motor disorder characterized by sensory discomfort in legs, appearing or worsening during rest in the evening or night time, evoking the urge to move. Despite its wide prevalence (around 5−10% in the population) and essential influence on the quality of life, not all the physicians, specialists of the primary care and even neurologists are common with this disorder. Because of that RLS stays commonly unrecognized.Синдром беспокойных ног является хроническим сенсомоторным расстройством, которое подразумевает сенсорный дискомфорт в ногах или других частях тела, возникающий или усиливающийся в покое, в вечернее/ночное время, и вызывающий потребность в движении. Несмотря на широкую распространенность (около 5−10 % в популяции) и значимое влияние на качество жизни, врачи общей практики, специалисты первого звена и сами неврологи недостаточно осведомлены о данном заболевании, в связи с чем оно часто остается ошибочно диагностируемым состоянием

Analysis of hadron production in nucleus-nucleus interactions up to and out of kinematical limit of free NN-collisions in the frame of FRITIOF model

In the framework of the modified FRITIOF model, the inclusive spectra of the cumulative $\pi ^0$-, $\pi ^-$-mesons and protons produced in the nucleus-nucleus interactions at 4.5 GeV/c/nucleon and 4.2 GeV/c/nucleon are calculated. It is shown that the model reproduces qualitatively, and in some cases quantitatively the main experimental regularities of $\pi$-mesons production, and "soft" part of the proton spectra. According to the model the production of the cumulative particles is connected with the mechanism of the "soft" nucleon-nucleon interaction.Comment: 12 pages, 11 figure

The study of the structure of anxiety in athletes

Objective: to study the structure of disorders caused by anxiety in athletes. Materials and methods: the objects of the first task of the research were different terminological definitions and classifications of anxiety disorders. Comparative analysis of the definitions and concepts used in psychology, physiology, sports medicine, theory and methodology of physical education has been carried out. The second task was to determine the leading factors characterizing the psychological status of athletes, and to give them the descriptive characteristics. A factor analysis was conducted on the results of testing 79 athletes of combat sports (34 men, 45 women) using the M Luscher color test and the integrative anxiety test by AP Bizyuk, LI Wasserman, BV Iovlev. Results: Luscher's test scores (total deviation from the autogenous rate, mental performance, vegetative coefficient) explained only 14.5% of the total variance. Simultaneously, the indicator of situational anxiety from Luscher's test was not included in any factor. The informativeness of more detailed integrative anxiety test was significantly higher: its indicators were included in 3 factors, explaining totally 49.5% of the total variance, as well as in the general factor, which explains 33% of the total variance. Conclusions: the emotional component (emotions which cause situational anxiety) contributes largely to the total anxiety level, some smaller contribution accounts for the social components (fear of condemnation, dependence on the opinions of others), finally, the personal anxiety contributes to it even less

Azimuthal anisotropy in U+U and Au+Au collisions at RHIC

Collisions between prolate uranium nuclei are used to study how particle production and azimuthal anisotropies depend on initial geometry in heavy-ion collisions. We report the two- and four-particle cumulants, $v_2\{2\}$ and $v_2\{4\}$, for charged hadrons from U+U collisions at $\sqrt{s_{\rm NN}}$ = 193 GeV and Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV. Nearly fully overlapping collisions are selected based on the amount of energy deposited by spectators in the STAR Zero Degree Calorimeters (ZDCs). Within this sample, the observed dependence of $v_2\{2\}$ on multiplicity demonstrates that ZDC information combined with multiplicity can preferentially select different overlap configurations in U+U collisions. An initial-state model with gluon saturation describes the slope of $v_2\{2\}$ as a function of multiplicity in central collisions better than one based on Glauber with a two-component multiplicity model.Comment: Final paper version accepted for publication in Phys. Rev. Lett. New version includes comparisons to a constituent quark glauber mode

Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au+Au collisions at sNN=19.6\sqrt{s_{NN}} = 19.6 and 200 GeV

The acceptance-corrected dielectron excess mass spectra, where the known hadronic sources have been subtracted from the inclusive dielectron mass spectra, are reported for the first time at mid-rapidity $|y_{ee}|<1$ in minimum-bias Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 and 200 GeV. The excess mass spectra are consistently described by a model calculation with a broadened $\rho$ spectral function for $M_{ee}<1.1$ GeV/$c^{2}$. The integrated dielectron excess yield at $\sqrt{s_{NN}}$ = 19.6 GeV for $0.4<M_{ee}<0.75$ GeV/$c^2$, normalized to the charged particle multiplicity at mid-rapidity, has a value similar to that in In+In collisions at $\sqrt{s_{NN}}$ = 17.3 GeV. For $\sqrt{s_{NN}}$ = 200 GeV, the normalized excess yield in central collisions is higher than that at $\sqrt{s_{NN}}$ = 17.3 GeV and increases from peripheral to central collisions. These measurements indicate that the lifetime of the hot, dense medium created in central Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV is longer than those in peripheral collisions and at lower energies.Comment: 9 pages, 6 figure