100 research outputs found
Science Requirements and Conceptual Design for a Polarized Medium Energy Electron-Ion Collider at Jefferson Lab
This report presents a brief summary of the science opportunities and program
of a polarized medium energy electron-ion collider at Jefferson Lab and a
comprehensive description of the conceptual design of such a collider based on
the CEBAF electron accelerator facility.Comment: 160 pages, ~93 figures This work was supported by the U.S. Department
of Energy, Office of Nuclear Physics, under Contract No. DE-AC05-06OR23177,
DE-AC02-06CH11357, DE-AC05-060R23177, and DESC0005823. The U.S. Government
retains a non-exclusive, paid-up, irrevocable, world-wide license to publish
or reproduce this manuscript for U.S. Government purpose
Inertial mechanism: dynamical mass as a source of particle creation
A kinetic theory of vacuum particle creation under the action of an inertial
mechanism is constructed within a nonpertrubative dynamical approach. At the
semi-phenomenological level, the inertial mechanism corresponds to quantum
field theory with a time-dependent mass. At the microscopic level, such a
dependence may be caused by different reasons: The non-stationary Higgs
mechanism, the influence of a mean field or condensate, the presence of the
conformal multiplier in the scalar-tensor gravitation theory etc. In what
follows, a kinetic theory in the collisionless approximation is developed for
scalar, spinor and massive vector fields in the framework of the oscillator
representation, which is an effective tool for transition to the quasiparticle
description and for derivation of non-Markovian kinetic equations. Properties
of these equations and relevant observables (particle number and energy
densities, pressure) are studied. The developed theory is applied here to
describe the vacuum matter creation in conformal cosmological models and
discuss the problem of the observed number density of photons in the cosmic
microwave background radiation. As other example, the self-consistent evolution
of scalar fields with non-monotonic self-interaction potentials (the
W-potential and Witten - Di Vecchia - Veneziano model) is considered. In
particular, conditions for appearance of tachyonic modes and a problem of the
relevant definition of a vacuum state are considered.Comment: 51 pages, 18 figures, submitted to PEPAN (JINR, Dubna); v2: added
reference
THE FIRST EXPERIENCE IN CLINICAL APPLICATION OF DOMESTIC CIRCULATORY SUPPORT DEVICE ON BASIS OF IMPLANTABLE AXIAL PUMP FOR TWO STAGE HEART TRANSPLANTATION
The paper describes the first clinical experience in RF of successful application of domestic circulatory support device based on implantable axial pump for two stage heart transplantation. This case demonstrate the effec- tiveness and safety of our device (АВК-Н) for a longtime (270 days) left ventricular bypass and the ability to perform a successful transplantation of donor,s heart after application of this system
ПЕРВЫЙ ОПЫТ КЛИНИЧЕСКОГО ПРИМЕНЕНИЯ ОТЕЧЕСТВЕННОГО АППАРАТА ВСПОМОГАТЕЛЬНОГО КРОВООБРАЩЕНИЯ НА БАЗЕ ИМПЛАНТИРУЕМОГО ОСЕВОГО НАСОСА ДЛЯ ДВУХЭТАПНОЙ ТРАНСПЛАНТАЦИИ СЕРДЦА
The paper describes the first clinical experience in RF of successful application of domestic circulatory support device based on implantable axial pump for two stage heart transplantation. This case demonstrate the effec- tiveness and safety of our device (АВК-Н) for a longtime (270 days) left ventricular bypass and the ability to perform a successful transplantation of donor,s heart after application of this system. В статье описан первый в РФ клинический опыт успешного применения отечественного аппарата вспомо- гательного кровообращения на базе имплантируемого осевого насоса для двухэтапной трансплантации сердца. Показана эффективность и безопасность использования системы АВК-Н с целью длительного (270 суток) обхода левого желудочка и возможность выполнения успешной трансплантации донорского сердца после эксплантации системы.
Fatigue strength of a glass laminate subjected to combined normal and interlaminar shear stresses
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