54 research outputs found
Particle acceleration in the vacuum gaps in black hole magnetospheres
We consider particle acceleration in vacuum gaps in magnetospheres of black
holes powered through Blandford-Znajek mechanism and embedded into
radiatively-inefficient accretion flow (RIAF) environment. In such situation
the gap height is limited by the onset of gamma-gamma pair production on the
infrared photons originating from the RIAF. We numerically calculate
acceleration and propagation of charged particles taking into account the
detailed structure of electric and magnetic field in the gap and in the entire
black hole magnetosphere, radiative energy losses and interactions of gamma
rays produced by the propagated charged particles with the background radiation
field of RIAF. We show that the presence of the vacuum gap has clear
observational signatures. The spectra of emission from gaps embedded into a
relatively high luminosity RIAF are dominated by the inverse Compton emission
with a sharp, super-exponential cut-off in the very-high-energy gamma-ray band.
The cut-off energy is determined by the properties of the RIAF and is largely
independent of the structure of magnetosphere and geometry of the gap.The
spectra of the gap residing in low-luminosity RIAFs are dominated by
synchrotron / curvature emission with the spectra extending into 1-100 GeV
energy range. We also consider the effect of possible acceleration of protons
in the gap and find that proton energies could reach the ultra-high-energy
cosmic ray (UHECR) range only in extremely low luminosity RIAFs.Comment: 10 pages, 15 figure
Fund assessment tools final certification of masters for the educational program «Communication Technologies»
Presented by the fund valuation means the final certification of students to graduate educational program «Communication Technologies». Identified the key components o f the fund evaluation tools. The content of the key components. We describe the criteria for assessment of final qualifying works of studentsПредставлено назначение фонда оценочных средств итоговой аттестации студентов для образовательной программы магистратуры «Коммуникационные технологии». Определены ключевые компоненты фонда оценочных средств. Раскрыто содержание ключевых компонент. Описаны критерии оценивания выпускных квалификационных работ студенто
Preparation of masters of technology research and educational environments
Presenting the program of the discipline «Technology research and educational environments». The groups of students competencies. Disclosed competence of each group. We describe the knowledge, skills and abilities of studentsПредставлена программа дисциплины «Технологии научно-образовательных сред». Определены группы компетенций студентов. Раскрыты компетенции каждой группы. Описаны знания, навыки и умения обучающихс
Towards a model of population of astrophysical sources of ultra-high-energy cosmic rays
We construct and discuss a toy model of the population of numerous
non-identical extragalactic sources of ultra-high-energy cosmic rays. In the
model, cosmic-ray particles are accelerated in magnetospheres of supermassive
black holes in galactic nuclei, the key parameter of acceleration being the
black-hole mass. We use astrophysical data on the redshift-dependent black-hole
mass function to describe the population of these cosmic-ray accelerators, from
weak to powerful, and confront the model with cosmic-ray data.Comment: 9 pages, 4 figures, Revtex 4.
New segment methodology and service design intelligent information agent for large-scale networks
Presented by expanding design methodology intelligent software agents for large-scale networksПредставлено расширение методологии проектирования интеллектуальных программных агентов для крупномасштабных сете
Expansion of knowledge about information protection in educational programs of mast
Presents the conditions for the development of the digital economy, considered the objective prerequisites for the expansion of knowledge about information security in graduate education programs, describes the techniques for studying the dynamic characteristics of quantum means of cryptographic protection, proposed ways of end-to-end connectivity of quantum technologies and information security technologiesПредставлены условия для развития цифровой экономики, рассмотрены объективные предпосылки для расширения знаний о защите информации в образовательных программах магистратуры, описаны приёмы исследования динамических характеристик квантовых средств криптозащиты, предложены способы сквозной связности квантовых технологий и технологий информационной безопасност
New components of information technology definitions and evaluation of dynamic characteristics of formal model profiles agent systems
The extension of the functionality of the methodology of forming a model of information-analytical intelligence agentsПредложено расширение функциональных возможностей методологии формирования модельно-аналитического интеллекта информационных агенто
Search for single sources of ultra high energy cosmic rays on the sky
In this paper, we suggest a new way to identify single bright sources of
Ultra High Energy Cosmic Rays (UHECR) on the sky, on top of background. We look
for doublets of events at the highest energies, E > 6 x 10^19 eV, and identify
low energy tails, which are deflected by the Galactic Magnetic Field (GMF). For
the sources which are detected, we can recover their angular positions on the
sky within one degree from the real ones in 68% of cases. The reconstruction of
the deflection power of the regular GMF is strongly affected by the value of
the turbulent GMF. For typical values of 4 microG near the Earth, one can
reconstruct the deflection power with 25% precision in 68% of cases.Comment: 20 pages, 10 figures. Corresponds to the version published in JCA
Sources of UHECRs in view of the TUS and JEM-EUSO experiments
The origin of ultra-high-energy cosmic rays (UHECRs) is one of the most
intriguing problems of modern cosmic ray physics. We briefly review the main
astrophysical models of their origin and the forthcoming orbital experiments
TUS and JEM-EUSO, and discuss how the new data can help one solve the
long-standing puzzle.Comment: 4 pages; prepared for ECRS-2012 (http://ecrs2012.sinp.msu.ru/); v2: a
reference adde
EXTENSION OF KNOWLEDGE ABOUT EARLY DETECTION OF APPEARING CHANGES
The reasons for the development of software for early detection of emerging changes are presented. The conditions for detecting emerging changes are described. A promising technique for the intellectualization of early detection systems based on the connection of model-analytical intelligence is proposed. The method for detecting emerging changes has been selected. The basic techniques for the formation of model-analytical intelligence for early detection systems of emerging changes are determined.Представлены основания для развития математического обеспечения систем раннего обнаружения появляющихся изменений. Описаны условия обнаружения появляющихся изменений. Предложен перспективный прием интеллектуализации систем раннего обнаружения на основе подключения модельно-аналитического интеллекта. Выбран метод обнаружения появляющихся изменений. Определены основные приемы формирования модельно-аналитического интеллекта для систем раннего обнаружения появляющихся изменений
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