Spatial Structure of Large-Scale Plasma Density Perturbations HF-Induced in the Ionospheric F<inf>2</inf> Region

© 2016 Springer Science+Business Media New YorkWe consider the experimental results obtained by studying the large-scale structure of the HF-disturbed ionospheric region. The experiments were performed using the SURA heating facility. The disturbed ionospheric region was sounded by signals radiated by GPS navigation satellite beacons as well as by signals of low-orbit satellites (radio tomography). The results of the experiments show that large-scale plasma density perturbations induced at altitudes higher than the F2 layer maximum can contribute significantly to the measured variations of the total electron density and can, with a certain arrangement of the reception points, be measured by the GPS sounding method

Spatial Structure of Large-Scale Plasma Density Perturbations HF-Induced in the Ionospheric F <inf>2</inf> Region

© 2016, Springer Science+Business Media New York.We consider the experimental results obtained by studying the large-scale structure of the HF-disturbed ionospheric region. The experiments were performed using the SURA heating facility. The disturbed ionospheric region was sounded by signals radiated by GPS navigation satellite beacons as well as by signals of low-orbit satellites (radio tomography). The results of the experiments show that large-scale plasma density perturbations induced at altitudes higher than the F2 layer maximum can contribute significantly to the measured variations of the total electron density and can, with a certain arrangement of the reception points, be measured by the GPS sounding method

ИСПОЛЬЗОВАНИЕ ПОЛИПЕПТИДНОГО СТИМУЛЯТОРА В КОМПЛЕКСНОМ ЛЕЧЕНИИ КОГНИТИВНЫХ НАРУШЕНИЙ У ДЕТЕЙ С ЗАБОЛЕВАНИЯМИ ЦЕНТРАЛЬНОЙ НЕРВНОЙ СИСТЕМЫ

The results of the review of studies on the polypeptide nootropic neurometabolic stimulator in a complex correction of cognitive impairment in children with diseases of the central nervous system are given in the article. It is shown that cognitive-modulating effect is the leading feature of the drug, and in a combination with nootropic, neurotrophic, neuroprotective, reparative and anticonvulsive effects, as well as antioxidant, anti-stress and metabolic actions, which determines its high therapeutic efficacy in a complex correction of cognitive impairment in various central nervous system diseases in children.В статье приведены результаты обзора исследований, посвященных применению полипептидного ноотропного и нейрометаболического стимулятора в комплексной коррекции когнитивных нарушений у детей с заболеваниями центральной нервной системы. Показано, что ведущим свойством данного препарата является когнитивно-модулирующий эффект в сочетании с ноотропным, нейротрофическим, нейропротекторным, репаративным, антиконвульсивным, а также антиоксидантным, метаболическим и антистрессорным действием, что определяет его высокие терапевтические свойства в комплексной коррекции когнитивных нарушений при различных заболеваниях центральной нервной системы у детей

Дифференциальная диагностика митохондриальной нейрогастроинтестинальной энцефаломиопатии. Первое клиническое описание в России

Mitochondrial neurogastrointestinal encephalomyopathy syndrome (MNGIE) is a rare autosomal recessive progressive multisystem disorder. Most of MNGIE is caused by mutations in the gene encoding thymidine phosphorylase (TYMP), locus 22q13. Mitochondrial dysfunction represents multiple deletions and depletion of mtDNA. We present a case of MNGIE with a novel mutation in the position c.1001T&gt;G of TYMP gene, hypergonadotropic hypogonadism, decrement of compound muscle action potential following repetitive nerve stimulation on EMG which was not previously described in literature and differential diagnoses MNGIE with other conditions.Митохондриальная нейрогастроинтестинальная энцефаломиопатия (МНГИЭ) – генетически гетерогенная группа редких, неуклонно прогрессирующих аутосомно-рецессивных заболеваний. МНГИЭ вызывается мутациями в генах ядерной ДНК, вторично приводящими к множественным делециям и истощению митохондриальной ДНК. Наиболее частой причиной МНГИЭ являются мутации в гене тимидинфосфорилазы (TYMP), локусе 22q13. Экспрессия измененного белка TYMP приводит к поражению тканей в пищеварительной и нервной системе и определяет основные клинические проявления МНГИЭ. Ранняя постановка диагноза и своевременно начатое лечение больных позволяет отсрочить появление летальных осложнений при МНГИЭ. Однако своевременную диагностику МНГИЭ затрудняют выраженный клинический полиморфизм, полисистемный характер нарушений, манифестация с поражения различных органов и систем, протекающих часто схоже с большой группой наследственных и приобретенных заболеваний. Мы представляем подробное описание случая МНГИЭ с новой мутацией c.1001T&gt;G в гене TYMP, гипергонадотропным гипогонадизмом, декрементом при ритмической стимуляции, не описанным ранее в литературе, и разбор дифференциальной диагностики МНГИЭ и схожих заболеваний

Measurement of the Spin-Dependence of the pbar-p Interaction at the AD-Ring

We propose to use an internal polarized hydrogen storage cell gas target in the AD ring to determine for the first time the two total spin-dependent pbar-p cross sections sigma_1 and sigma_2 at antiproton beam energies in the range from 50 to 450 MeV. The data obtained are of interest by themselves for the general theory of pbar-p interactions since they will provide a first experimental constraint of the spin-spin dependence of the nucleon-antinucleon potential in the energy range of interest. In addition, measurements of the polarization buildup of stored antiprotons are required to define the optimum parameters of a future, dedicated Antiproton Polarizer Ring (APR), intended to feed a double-polarized asymmetric pbar-p collider with polarized antiprotons. Such a machine has recently been proposed by the PAX collaboration for the new Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt, Germany. The availability of an intense stored beam of polarized antiprotons will provide access to a wealth of single- and double-spin observables, thereby opening a new window on QCD spin physics.Comment: 51 pages, 23 figures, proposal submitted to the SPS committee of CER

The SHiP experiment at the proposed CERN SPS Beam Dump Facility

The Search for Hidden Particles (SHiP) Collaboration has proposed a general-purpose experimental facility operating in beam-dump mode at the CERN SPS accelerator to search for light, feebly interacting particles. In the baseline configuration, the SHiP experiment incorporates two complementary detectors. The upstream detector is designed for recoil signatures of light dark matter (LDM) scattering and for neutrino physics, in particular with tau neutrinos. It consists of a spectrometer magnet housing a layered detector system with high-density LDM/neutrino target plates, emulsion-film technology and electronic high-precision tracking. The total detector target mass amounts to about eight tonnes. The downstream detector system aims at measuring visible decays of feebly interacting particles to both fully reconstructed final states and to partially reconstructed final states with neutrinos, in a nearly background-free environment. The detector consists of a 50 m long decay volume under vacuum followed by a spectrometer and particle identification system with a rectangular acceptance of 5 m in width and 10 m in height. Using the high-intensity beam of 400 GeV protons, the experiment aims at profiting from the 4 x 10(19) protons per year that are currently unexploited at the SPS, over a period of 5-10 years. This allows probing dark photons, dark scalars and pseudo-scalars, and heavy neutral leptons with GeV-scale masses in the direct searches at sensitivities that largely exceed those of existing and projected experiments. The sensitivity to light dark matter through scattering reaches well below the dark matter relic density limits in the range from a few MeV/c(2) up to 100 MeV-scale masses, and it will be possible to study tau neutrino interactions with unprecedented statistics. This paper describes the SHiP experiment baseline setup and the detector systems, together with performance results from prototypes in test beams, as it was prepared for the 2020 Update of the European Strategy for Particle Physics. The expected detector performance from simulation is summarised at the end

Measurement of associated charm production induced by 400 GeV/c protons

An important input for the interpretation of the measurements of the SHiP ex- periment is a good knowledge of the differential charm production cross section, including cascade production. This is a proposal to measure the associated charm production cross section, employing the SPS 400 GeV/c proton beam and a replica of the first two interaction lengths of the SHiP target. The detection of the produc- tion and decay of charmed hadron in the target will be performed through nuclear emulsion films, employed in an Emulsion Cloud Chamber target structure. In order to measure charge and momentum of decay daughters, we intend to build a mag- netic spectrometer using silicon pixel, scintillating fibre and drift tube detectors. A muon tagger will be built using RPCs. An optimization run is scheduled in 2018, while the full measurement will be performed after the second LHC Long Shutdown

Modern Trends of Organic Chemistry in Russian Universities

© 2018, Pleiades Publishing, Ltd. This review is devoted to the scientific achievements of the departments of organic chemistry in higher schools of Russia within the past decade