Six Unpublished Nabataean Drachms: Filling some Gaps

Sechs bisher unbekannte nabatäische Drachmen aus der Regierungszeit von Aretas IV., Malichus II. und Rabbel II. werden in diesem Artikel vorgestellt. Die jeweils datierten Münzen schließen einige der zeitlichen Lücken in der Silberprägung dieser Zeit. Einblick in die Silberknappheit im nabatäischen Königreichs während dieser Periode wird gegeben. Für bislang (noch) nicht nachgewiesene datierte Drachmen lassen sich Vermutungen aufstellen.Six hitherto unknown dated Nabataean drachms from the reigns of Aretas IV, Malichus II, and Rabbel II are described in this article. The existence of these coins tightens some of the temporal gaps in the dated silver coinage of this period. Insight into the scarcity of silver within the Nabataean kingdom during this period is demonstrated. Suggestions as to yet undiscovered dated drachms are also made

Equation level matching: An extension of the method of matched asymptotic expansion for problems of wave propagation

We introduce an alternative to the method of matched asymptotic expansions. In the "traditional" implementation, approximate solutions, valid in different (but overlapping) regions are matched by using "intermediate" variables. Here we propose to match at the level of the equations involved, via a "uniform expansion" whose equations enfold those of the approximations to be matched. This has the advantage that one does not need to explicitly solve the asymptotic equations to do the matching, which can be quite impossible for some problems. In addition, it allows matching to proceed in certain wave situations where the traditional approach fails because the time behaviors differ (e.g., one of the expansions does not include dissipation). On the other hand, this approach does not provide the fairly explicit approximations resulting from standard matching. In fact, this is not even its aim, which to produce the "simplest" set of equations that capture the behavior

Simple Viscous Flows: from Boundary Layers to the Renormalization Group

The seemingly simple problem of determining the drag on a body moving through a very viscous fluid has, for over 150 years, been a source of theoretical confusion, mathematical paradoxes, and experimental artifacts, primarily arising from the complex boundary layer structure of the flow near the body and at infinity. We review the extensive experimental and theoretical literature on this problem, with special emphasis on the logical relationship between different approaches. The survey begins with the developments of matched asymptotic expansions, and concludes with a discussion of perturbative renormalization group techniques, adapted from quantum field theory to differential equations. The renormalization group calculations lead to a new prediction for the drag coefficient, one which can both reproduce and surpass the results of matched asymptotics

Ресурсо-інноваційна модель підвищення рівня автономії вищих навчальних закладів

The importance of expanding university autonomy was and remains one of the priorities of educational policy of Ukraine, the main precondition for universities to integrate Ukraine into the global academic community. Reasonable is the development and practical implementation of resource-innovative models of raising autonomy level of higher education institutions to enhance the independence and accountability of the University in decision making of academic freedom, organization of educational process, research, internal management. The implementation of resource-innovation model as alternative of academic (university) entrepreneurship would allow Ukrainian universities to move to a new type of commercially-oriented business relations on the principles of market economy, develop academic-educational, scientific, design and engineering work.Важливість розширення університетської автономії було і залишається одним із пріоритетів освітньої політики України, головною передумовою інтеграції університетів України до світової академічної спільноти. Доцільним є розробка та практичне впровадження ресурсо-інноваційної моделі підвищення рівня автономії вищих навчальних закладів з метою підвищення рівня самостійності, незалежності та відповідальності університету в прийнятті рішень відносно розвитку академічних свобод, організації освітнього процесу, наукових досліджень, внутрішнього управління. Впровадження ресурсо-інноваційної моделі як варіанту академічного (університетського) підприємництва дозволить перейти українським ВНЗ до нового типу комерційно-орієнтованих підприємницьких відносин на принципах ринкової економіки, розвинути академічно-освітню, наукову, проектно-конструкторську та інженерно-технічну діяльність

Method of calculation time and the path acceleration

Запропоновано методику та алгоритм виконання розрахунків динамічної характеристики часу та шляху розгону автомобіля,що дозволить мати наближені до експериментальних параметри.Proposed the method and algorithm of the calculations of the dynamic characteristics, time and path of acceleration, which will have close to the experimental parameters

The Introduction of DTT in Latin America: Politics and Policies

The switch to digital terrestrial television is now a global trend. In Latin America, where the terrestrial platform has a dominant role, the introduction of DTT raises important questions for economic and industrial development, as well as pluralism. This article focuses on the earliest experiences (Brazil, México and Argentina) and those of the newcomers (Chile, Colombia and Uruguay). The aim is to outline the differences between the various political decision processes and the way with which they have been turned into communication policies, so as to draw some conclusions that contribute to visualizing the future of television in the region.Publicad

A separation of electrons and protons in the GAMMA-400 gamma-ray telescope

The GAMMA-400 gamma-ray telescope is intended to measure the fluxes of gamma rays and cosmic-ray electrons and positrons in the energy range from 100 MeV to several TeV. Such measurements concern with the following scientific goals: search for signatures of dark matter, investigation of gamma-ray point and extended sources, studies of the energy spectra of Galactic and extragalactic diffuse emission, studies of gamma-ray bursts and gamma-ray emission from the active Sun, as well as high-precision measurements of spectra of high-energy electrons and positrons, protons, and nuclei up to the knee. The main components of cosmic rays are protons and helium nuclei, whereas the part of lepton component in the total flux is ~10E-3 for high energies. In present paper, the capability of the GAMMA-400 gamma-ray telescope to distinguish electrons and positrons from protons in cosmic rays is investigated. The individual contribution to the proton rejection is studied for each detector system of the GAMMA-400 gamma-ray telescope. Using combined information from all detector systems allow us to provide the proton rejection from electrons with a factor of ~4x10E5 for vertical incident particles and ~3x10E5 for particles with initial inclination of 30 degrees. The calculations were performed for the electron energy range from 50 GeV to 1 TeV.Comment: 19 pages, 10 figures, submitted to Advances and Space Researc

The GAMMA-400 space observatory: status and perspectives

The present design of the new space observatory GAMMA-400 is presented in this paper. The instrument has been designed for the optimal detection of gamma rays in a broad energy range (from ~100 MeV up to 3 TeV), with excellent angular and energy resolution. The observatory will also allow precise and high statistic studies of the electron component in the cosmic rays up to the multi TeV region, as well as protons and nuclei spectra up to the knee region. The GAMMA-400 observatory will allow to address a broad range of science topics, like search for signatures of dark matter, studies of Galactic and extragalactic gamma-ray sources, Galactic and extragalactic diffuse emission, gamma-ray bursts and charged cosmic rays acceleration and diffusion mechanism up to the knee