Parameter selection for the supply system in a Pilger mill

The braking chamber in the supply system of a Pilger pipe mill is modernized. The influence of constant and variable parameters of the supply system on braking is studied. © 2013 Allerton Press, Inc

Rapid evolution of hybrid breakdown following recent divergence with gene flow in Senecio species on Mount Etna, Sicily

How do nascent species evolve reproductive isolation during speciation with on-going gene flow? How do hybrid lineages become stabilised hybrid species? While commonly used genomic approaches provide an indirect way to identify species incompatibility factors, synthetic hybrids generated from interspecific crosses allow direct pinpointing of phenotypic traits involved in incompatibilities and the traits that are potentially adaptive in hybrid species. Here we report the analysis of phenotypic variation and hybrid breakdown in crosses between closely-related Senecio aethnensis and S. chrysanthemifolius, and their homoploid hybrid species, S. squalidus. The two former species represent a likely case of recent (<200 ky) speciation with gene flow driven by adaptation to contrasting conditions of high- and low-elevations on Mount Etna, Sicily. As these species form viable and fertile hybrids, it remains unclear whether they have started to evolve reproductive incompatibility. Our analysis represents the first study of phenotypic variation and hybrid breakdown involving multiple Senecio hybrid families. It revealed wide range of variation in multiple traits, including the traits previously unrecorded in synthetic hybrids. Leaf shape, highly distinct between S. aethnensis and S. chrysanthemifolius, was extremely variable in F2 hybrids, but more consistent in S. squalidus. Our study demonstrates that interspecific incompatibilities can evolve rapidly despite on-going gene flow between the species. Further work is necessary to understand the genetic bases of these incompatibilities and their role in speciation with gene flow.info:eu-repo/semantics/publishedVersio

Spin Response Function for Spin Transparency Mode of RHIC

In the Spin Transparency (ST) mode of RHIC, the axes of its Siberian snakes are parallel. The spin tune in the ST mode is zero and the spin motion becomes degenerate: any spin direction repeats every particle turn. In contrast, the lattice of a conventional collider determines a unique stable periodic spin direction, so that the collider operates in the Preferred Spin (PS) mode. Contributions of perturbing magnetic fields to the spin resonance strengths in the PS mode are usually calculated using the spin response function. However, in that form, it is not applicable in the ST mode. This paper presents a response function formalism expanded for the ST mode of operation of conventional colliders with two identical Siberian snakes in the highly-relativistic limit. We present calculations of the spin response function for RHIC in the ST mode

Experimental Verification of Transparent Spin Mode in RHIC

High electron and ion polarizations are some of the key design requirements of a future Electron Ion Collider (EIC). The transparent spin mode, a concept inspired by the figure 8 ring design of JLEIC, is a novel technique for preservation and control of electron and ion spin polarizations in a collider or storage ring. It makes the ring lattice invisible to the spin and allows for polarization control by small quasi-static magnetic fields with practically no effect on the beam’s orbital characteristics. It offers unique opportunities for polarization maintenance and control in Jefferson Lab’s JLEIC and in BNL’s eRHIC. The transparent spin mode has been demonstrated in simulations and we now plan to test it experimentally. We present a design of an experiment using a polarized proton beam stored in one of the RHIC rings. In the experiment, one of the RHIC rings is configured in the transparent spin mode by aligning the axes of its two Siberian snakes. The experiment goals, procedures, hardware requirements and expected results are presented

Laser acceleration of ion beams

We consider methods of charged particle acceleration by means of high-intensity lasers. As an application we discuss a laser booster for heavy ion beams provided, e.g. by the Dubna nuclotron. Simple estimates show that a cascade of crossed laser beams would be necessary to provide additional acceleration to gold ions of the order of GeV/nucleon.Comment: 4 pages, 4 figures, Talk at the Helmholtz International Summer School "Dense Matter in heavy Ion Collisions and Astrophysics", August 21 - September 1, 2006, JINR Dubna, Russia; v2, misprints correcte

Wireless digital traffic signs of the future

[EN] Traffic signs have come a long way since the first automobile was invented. They have long served the purpose of warning and guiding drivers and also enforcing the traffic laws governing speed, parking, turns, and stopping. In this study, the authors discuss the issues and challenges facing current traffic signs, and how it will evolve into a next-generation traffic sign architecture using advanced wireless communications technologies. With technological advances in the areas of wireless communications and embedded electronics and software, we foresee that, in the future, digital traffic sign posts will be capable of transmitting the traffic sign information wirelessly to road users, and this will transform our roads into intelligent roads, where signs will appear promptly and automatically on in-vehicle displays to alert the driver. There is no longer the need to watch out for traffic signs since the detection will be automatic and performed wirelessly. This transformation will lessen burden on the drivers, so that they can then focus more on the traffic ahead while driving. Also, this evolution into wireless digital sign posts will fit well with the vision of future smart cities, where smart transportation technologies will be present to transform how we drive and commute, yielding greater safety, ease, and assistance to drivers.Toh, CK.; Cano, J.; Fernandez-Laguia, C.; Manzoni, P.; Tavares De Araujo Cesariny Calafate, CM. (2019). Wireless digital traffic signs of the future. IET Networks. 8(1):74-78. https://doi.org/10.1049/iet-net.2018.5127S74788

Designing efficient textbook for teaching chinese students “information technologies in art history” within english-speaking educational environment

In the paper, the challenges of teaching Chinese students in Belarus within an English-speaking educational environment are discussed. Main principles of elaborating effective textbooks on special disciplines for supporting educational processes in multicultural students groups are proposed. The successful example of the English-language textbook «Information Technologies in Art History » for teaching Chinese students is presented

Органические растворители и свойства прядильных растворов

The given article represents the bases of selection of solvents for polymer solutions. The results of the research indicate that the solvent is an effective instrument which allows the combination of polymers through the solutions. These solutions are employed for creating fibrous materials.В представленной работе отражены основные аспекты выбора растворителей при создании фильтрующих материалов ФП (Фильтр Петрянова®). Представлены результаты исследования, характеризующие растворитель как эффективный инструмент, позволяющий совмещать полимеры через растворы и получать прядильные растворы, используемые в ЭФВ-процессе (процессе эектроформования волокнистых материалов)

Исследование процесса электроформования смесей фторполимеров и свойств получаемых материалов

To substitute the foreign filtering membrane Millipore FSLW, which currently in use on some of Russian and Ukrainian NPP the nonwoven fibrous material, obtained by means of electrospinning from spinning solutions of mixtured fluoropolymers F-42 and SKF-26, have been produced. The influence of polymer ratio on fibrous material properties was investigated.С целью замены применяемой в настоящее время на ряде российских и украинских АЭС импортной фильтрующей мембраны Millipore FSLW был разработан отечественный нетканый волокнистый материал, полученный методом электроформования из формовочных растворов на основе смеси фторполимеров Ф-42 и СКФ-26. Исследовано влияние соотношения полимеров на свойства волокнистого материала