1,309 research outputs found
СИСТЕМА ЗАЖИГАНИЯ С АДАПТИРУЕМЫМ ПРЕОБРАЗОВАТЕЛЕМ
Starting of cold car internal combustion engine often becomes a problem. To ensure a consistent spark formation, certain conditions and efforts are required, including the choice of optimal operation of accumulator batteries, voltage indicators. This article provides general approaches to solving related tasks and evaluates the results of experimental studies of the ignition system when it is powered by an adaptive converter of electric energy pulse parameters at low temperatures.Пуск холодного автомобильного двигателя внутреннего сгорания зачастую превращается в проблему. Чтобы обеспечить бесперебойное искрообразование, нужны определенные условия и усилия, в том числе выбор оптимального режима работы аккумуляторных батарей, показателей напряжения тока. В статье даются общие подходы к решению связанных с этим задач и оцениваются результаты экспериментального исследования системы зажигания при ее питании от импульсного адаптивного преобразователя параметров электрической энергии в условиях низких температур
Tunka Advanced Instrument for cosmic rays and Gamma Astronomy
The paper is a script of a lecture given at the ISAPP-Baikal summer school in
2018. The lecture gives an overview of the Tunka Advanced Instrument for cosmic
rays and Gamma Astronomy (TAIGA) facility including historical introduction,
description of existing and future setups, and outreach and open data
activities.Comment: Lectures given at the ISAPP-Baikal Summer School 2018: Exploring the
Universe through multiple messengers, 12-21 July 2018, Bol'shie Koty, Russi
Метастатический кастрационно-резистентный рак предстательной железы: современный взгляд на медикаментозную терапию и альтернативная регуляция опухолевых клеток
Prostate cancer (PC) is one of the most common causes of death from malignant neoplasms in men in many countries around the world. Transmission of the signal in the androgenic axis of regulation is crucial for the development and progression of PC. Despite the constant dependence on androgen receptor signals in castration resistance, the use of new anti-androgenic drugs invariably leads to the stability of the ongoing treatment. The interaction of androgen receptor and alternative (phosphoinositide-3-kinases, PI3K) pathways in the regulation of cells can be one of the mechanisms of resistance to treatment. In this article, we describe current treatments for metastatic castration-resistant PC and the possible role of the PI3K pathway in the pathogenesis and progression of PC.Рак предстательной железы (РПЖ) является одной из самых частых причин смерти от злокачественных новообразований у мужчин во многих странах мира. Передача сигнала в андрогенной оси регуляции имеет решающее значение для развития и прогрессирования РПЖ. Несмотря на постоянную зависимость от сигналов андрогенных рецепторов при кастрационной резистентности, использование новых антиандрогенных препаратов неизменно приводит к развитию резистентности к лечению. Взаимодействие андрогенрецепторного и альтернативного (фосфатидилинозитол-3-киназа, PI3K) путей в регуляции опухолевых клеток может быть одним из механизмов развития резистентности к терапии. В настоящей статье описываются современные методы лечения метастатического кастрационно-резистентного РПЖ и возможная роль пути PI3K в патогенезе и прогрессировании РПЖ
Study of B -> \rho \pi decays at Belle
This paper describes a study of B meson decays to the pseudoscalar-vector
final state \rho\pi using 31.9\times 10^6 B\bar{B} events collected with the
Belle detector at KEKB. The branching fractions B(B^+ \to \rho^0\pi^+) =
(8.0^{+2.3+0.7}_{-2.0-0.7}) \times 10^{-6} and B(B^0 -> \rho^{+-} \pi^{-+}) =
(20.8^{+6.0+2.8}_{-6.3-3.1}) \times 10^{-6} are obtained. In addition, a 90%
confidence level upper limit of B(B^0 \to \rho^0\pi^0) < 5.3 \times 10^{-6}is
reported.Comment: 14 pages, 3 figures, to be submitted to Phys. Lett.
Search for a dark vector gauge boson decaying to using decays
We report a search for a dark vector gauge boson that couples to
quarks in the decay chain , . No signal is found and we set a
mass-dependent limit on the baryonic fine structure constant of in the mass range of 290 to 520 MeV/. This analysis is
based on a data sample of 976 fb collected by the Belle experiment at
the KEKB asymmetric-energy collider.Comment: 6 pages, 4 figure
Observation of and search for violation in radiative charm decays
We report the first observation of the radiative charm decay and the first search for violation in decays , , and , using a data sample of
943 fb collected with the Belle detector at the KEKB asymmetric-energy
collider. The branching fraction is measured to be , where the first
uncertainty is statistical and the second is systematic. The obtained
asymmetries, , , and
, are consistent with no violation. We also present an improved
measurement of the branching fractions and
Study of e+e- => B(*) B(*)-bar pi+- at sqrt(s)=10.866 GeV
We report the analysis of the three-body e+e- => B B-bar pi, B B*-bar pi, and
B* B*-bar pi processes, including the first observation of the Zb+-(10610) =>[B
B*-bar+c.c.]+- and Zb+-(10650) => [B*B*-bar]+- transitions. We measure visible
cross sections for the three-body production of sigma_vis(e+e- => [B
B*-bar+c.c.]+-pi-+=(11.2+-1.0(stat.)+-1.2(syst.)) pb and sigma_vis(e+e- =>
[B*B*-bar]+-pi-+)=(5.61+-0.73(stat.)+-0.66(syst.)) pb and set a 90% C.L. upper
limit of sigma_vis(e+e- => [BB-bar]+-pi-+)<2.1 pb. The results are based on a
121.4 1/fb data sample collected with the Belle detector at a center-of-mass
energy near the Y(5S) peak.Comment: 8 pages, 2 figure
Energy scan of the cross sections and evidence for decays into charged bottomonium-like states
Using data collected with the Belle detector at the KEKB asymmetric-energy
collider, we measure the energy dependence of the cross sections from thresholds up to GeV.
We find clear and peaks with little or no
continuum contribution. We study the resonant substructure of the
transitions and find evidence that they
proceed entirely via the intermediate isovector states and
. The relative fraction of these states is loosely constrained by
the current data: the hypothesis that only is produced is excluded
at the level of 3.3 standard deviations, while the hypothesis that only
is produced is not excluded at a significant level.Comment: 8 pages, 4 figures, submitted to Physical Review Letter
Search for the decay at Belle
We report a search for the rare charmless decay
using a data sample of
pairs collected at the resonance with
the Belle detector at the KEKB asymmetric-energy collider. No
statistically significant signal is found and a 90% confidence-level upper
limit is set on the decay branching fraction as .Comment: 8 pages, 3 figures, submitted to PRD(RC
- …