Quark-diquark model for p(\bar p)-p elastic scattering at high energies

A model for elastic scattering of protons at high energies based on the quark-diquark representation of the proton is discussed. The predictions of the model are compared with experimental data for the differential elastic cross-sections from available databasesComment: 4 pages, 5 figure

Study of non-collinear parton dynamics in the prompt photon photoproduction at HERA

We investigate the prompt photon photoproduction at HERA within the framework of kt-factorization QCD approach. Our consideration is based on the off-shell matrix elements for the underlying partonic subprocesses. The unintegrated parton densities in a proton and in a photon are determined using the Kimber-Martin-Ryskin (KMR) prescription. Additionally, we use the CCFM-evolved unintegrated gluon as well as valence and sea quark distributions in a proton. A conservative error analisys is performed. Both inclusive and associated with the hadronic jet production rates are investigated. The theoretical results are compared with the recent experimental data taken by the H1 and ZEUS collaborations. We study also the specific kinematical properties of the photon-jet system which are strongly sensitive to the transverse momentum of incoming partons. Using the KMR scheme, the contribution from the quarks emerging from the earlier steps of the parton evolution is estimated and found to be of 15 - 20 approximately.Comment: 22 pages, 13 figures, 2 tabl

Новые технологии управления финансированием инноваций в промышленности

The subject of the study is new technologies for managing industrial innovation funding. The aim of the article is to form an optimal mechanism for the application of technologies for managing industrial innovation funding based on the use of new financial instruments. The relevance of the research is due to the increasing role of innovation in ensuring competitive advantages and market stability of industrial enterprises, as well as the growing need to attract funding. The scientific novelty consists in grouping the existing financing technologies into three main groups: traditional, modern and new. The research methods are analysis, systematization, synthesis, induction, deduction, modeling. The authors built a model of the mutual influence of innovative industrial development and the subsequent development of financing technologies in the financial sector. In the course of the study, the author obtained the following results: a mechanism for applying new technologies to manage innovation funding was developed, a priority financial instrument was identified for use within the framework of the developed mechanism. The authors conclude that the role of digital technologies in the activities of an industrial enterprise and, accordingly, in innovation funding is increasing. At the same time, the activities of an enterprise in attracting resources by issuing digital securities (shares) to finance innovations are of the greatest practical interest.Предметом исследования выступают новые технологии управления финансированием инноваций в промышленности. Целью работы является формирование оптимального механизма применения технологий управления финансированием инноваций в промышленности на основе применения новых финансовых инструментов. Актуальность исследования обусловлена возрастанием роли инноваций в обеспечении конкурентных преимуществ и рыночной устойчивости промышленных предприятий, а также возрастанием потребности в привлечении финансирования. Научная новизна состоит в группировке применяемых на настоящий момент технологий финансирования на три основные группы: традиционные, современные и новые. Методами исследования выступают: анализ, систематизация, синтез, индукция, дедукция, моделирование. При этом разработана модель взаимного влияния инновационного развития в промышленности и последующего развития технологий финансирования в финансовом секторе. В ходе исследования авторы получили следующие результаты: разработан механизм применения новых технологий управления финансированием инноваций, определен приоритетный финансовый инструмент для использования в рамках разработанного механизма. Авторы делают вывод о возрастании роли цифровых технологий в деятельности промышленного предприятия и, соответственно, в финансировании инновационной деятельности. При этом наибольший практический интерес представляет деятельность предприятия по привлечению ресурсов посредством выпуска цифровых ценных бумаг (акций) для финансирования инноваций

Region of Excessive Flux of PeV Cosmic Rays in the Direction Toward Pulsars PSR J1840+5640 and LAT PSR J1836+5925

An analysis of arrival directions of extensive air showers (EAS) registered with the EAS MSU and EAS-1000 prototype arrays has revealed a region of excessive flux of PeV cosmic rays in the direction toward pulsars PSR J1840+5640 and LAT PSR J1836+5925 at significance level up to 4.5sigma. The first of the pulsars was discovered almost 30 years ago and is a well-studied old radio pulsar located at the distance of 1.7pc from the Solar system. The second pulsar belongs to a new type of pulsars, discovered by the space gamma-ray observatory Fermi, pulsations of which are not observed in optical and radio wavelengths but only in the gamma-ray range of energies (gamma-ray-only pulsars). In our opinion, the existence of the region of excessive flux of cosmic rays registered with two different arrays provides a strong evidence that isolated pulsars can give a noticeable contribution to the flux of Galactic cosmic rays in the PeV energy range.Comment: 14 pages; v.2: a few remarks to match a version accepted for Astronomy Letters added. They can be found by redefining the \NEW command in the preamble of the LaTeX fil

Strong-Pinning Effects in Low-Temperature Creep: Charge-Density Waves in TaS_3

Nonlinear conduction in the quasi-one dimensional conductor o-TaS_3 has been studied in the low-temperature region down to 30 mK. It was found that at temperatures below a few Kelvins the current-voltage (I-V) characteristics consist of several branches. The temperature evolution of the I-V curve proceeds through sequential freezing-out of the branches. The origin of each branch is attributed to a particular strong pinning impurity type. Similar behavior is expected for other physical systems with collective transport (spin-density waves, Wigner crystals, vortex lattices in type-II superconductors etc.) in the presence of strong pinning centers.Comment: 11 pages, 3 ps figures, Revtex, To be published in Phys. Rev. Letters (1997