197 research outputs found
Extreme plasma states in laser-governed vacuum breakdown
Triggering vacuum breakdown at the upcoming laser facilities can provide
rapid electron-positron pair production for studies in laboratory astrophysics
and fundamental physics. However, the density of the emerging plasma should
seemingly stop rising at the relativistic critical density, when the plasma
becomes opaque. Here we identify the opportunity of breaking this limit using
optimal beam configuration of petawatt-class lasers. Tightly focused laser
fields allow plasma generation in a small focal volume much less than
, and creating extreme plasma states in terms of density and
produced currents. These states can be regarded as a new object of nonlinear
plasma physics. Using 3D QED-PIC simulations we demonstrate the possibility of
reaching densities of more than cm, which is an order of
magnitude higher than previously expected. Controlling the process via the
initial target parameters gives the opportunity to reach the discovered plasma
states at the upcoming laser facilities
Mineral Water Tib-2 in Treatment of Patients with Nonalcoholic Steatohepatitis
Purpose: To examine the role of drinking mineral water Tib-2 in complex rehabilitation of patients in the NASH stationary phase. Material and methods. Observations of 60 patients with nonalcoholic steatohepatitis with minimal activity of the pathological process are carried out. Results. The positive dynamics of main indicators of hepato-biliary system function (lipid metabolism, lipid peroxidation, and cytokine status hemocoagulation) in complex application of spa phytofactors and drugs is significantly more pronounced (18.5%) compared to only medical and physiotherapy. Summary. The use of brackish drinking mineral water on the stationary phase of treatment of patients with NASH is feasible and promising
The Study of the Properties of Uranium Dioxide Pellets Depending on the Parameters of Pressing and Sintering
The paper presents dilatometric research of uranium dioxide pellets, fabricated by compaction at different pressure values. Temperature observed at sintering start is determined and it is pointed out that this temperature doesnβt depend on compaction pressure.
Keywords: uranium dioxide, compaction, sintering, dilatometry, shrink curves, geometric density, pycnometric density
The investigation of quasi-characteristic radiation of electrons channeled along the charged axes in the crystals of zinc blende
For slight relativistic electrons moving along the main charged [100] and [110] axes in the crystals of zinc blende there was made a numerical calculation of the transverse energy levels and corresponding wave functions. It was done the calculation and the comparison of quasi-characteristic radiation spectra for these axe
Origin of magnetic moments and presence of a resonating valence bond state in BaYIrO
While it was speculated that 5 systems would possess non-magnetic
~=~0 ground state due to strong Spin-Orbit Coupling (SOC), all such systems
have invariably shown presence of magnetic moments so far. A puzzling case is
that of BaYIrO, which in spite of having a perfectly cubic structure
with largely separated Ir () ions, has consistently shown presence
of weak magnetic moments. Moreover, we clearly show from Muon Spin Relaxation
(SR) measurements that a change in the magnetic environment of the
implanted muons in BaYIrO occurs as temperature is lowered below 10~K.
This observation becomes counterintuitive, as the estimated value of SOC
obtained by fitting the RIXS spectrum of BaYIrO with an atomic
model is found to be as high as 0.39~eV, meaning that the system within this
model is neither expected to possess moments nor exhibit temperature dependent
magnetic response. Therefore we argue that the atomic coupling
description is not sufficient to explain the ground state of such systems,
where despite having strong SOC, presence of hopping triggers delocalisation of
holes, resulting in spontaneous generation of magnetic moments. Our theoretical
calculations further indicate that these moments favour formation of
spin-orbital singlets in the case of BaYIrO, which is manifested in
SR experiments measured down to 60~mK.Comment: 20 Pages, 7 Figure
Features of testing a powerful integrated circuit or semiconductor device in the temperature range
Π’Π΅ΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ - ΡΡΠΎ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠ΅ ΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΌΠΈΠΊΡΠΎΡΡ
Π΅ΠΌ ΠΈ ΠΏΠΎΠ»ΡΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΈΠΊΠΎΠ²ΡΡ
ΠΏΡΠΈΠ±ΠΎΡΠΎΠ² ΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠ½ΡΡΠΎΠ»Ρ ΠΌΠΈΠΊΡΠΎΡΡ
Π΅ΠΌ. ΠΠΎΡΠΊΠΎΠ»ΡΠΊΡ ΠΌΠΎΡΠ½ΡΠ΅ ΠΌΠΈΠΊΡΠΎΡΡ
Π΅ΠΌΡ ΠΈ ΠΏΠΎΠ»ΡΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΈΠΊΠΎΠ²ΡΠ΅ ΠΏΡΠΈΠ±ΠΎΡΡ ΡΠ²Π»ΡΡΡΡΡ ΡΠ΅ΠΏΠ»ΠΎΠ²ΡΠ΄Π΅Π»ΡΡΡΠΈΠΌΠΈ, ΠΈΡ
ΡΠ΅ΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π΄ΠΎΠ»ΠΆΠ½ΠΎ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΡΡΡΡ Ρ
ΡΡΠ΅ΡΠΎΠΌ ΠΏΠ΅ΡΠ΅Π³ΡΠ΅Π²Π° ΠΊΡΠΈΡΡΠ°Π»Π»Π°. Π ΡΠ°Π±ΠΎΡΠ΅ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΡΠ΅ ΡΠΏΠΎΡΠΎΠ±Ρ ΠΈΡ
ΡΠ΅ΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ, Π² ΡΠΎΠΌ ΡΠΈΡΠ»Π΅
ΡΡΠΈΡΡΠ²Π°ΡΡΠΈΠ΅ ΠΏΠ΅ΡΠ΅Π³ΡΠ΅Π² ΠΊΡΠΈΡΡΠ°Π»Π»Π°. Testing is the measurement of electrical parameters of microcircuits and semiconductor devices and carrying out functional control of microcircuits. Since high-power chips and semiconductor devices are heatgenerating, their testing should be carried out taking into account the overheating of the crystal. The paper considers possible ways of testing them, including taking into account the overheating of the crystal
Prospects of the Resort Stage of Regenerative Treatment Patients with Complicated Forms of Pathology of the Digestive Organs (New Technologies)
The study which allows to speak with confidence about the feasibility and efficiency resort rehabilitation of patients with complicated forms of pathology of the digestive organs including in the early period after surgery were conducted in Pyatigorsk State Research Institute of Balneology FMBA of Russia. New medical technologies sanatorium treatment of complicated forms of pathology of the digestive system are developed. These techniques led to improved spa treatment and improve the quality of life for patients
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