893 research outputs found
On the training of specialists in the creation and maintenance of software for processing and presentation of geospatial data
ΠΠΎΠΊΠ°Π·Π°Π½Π° Π°ΠΊΡΡΠ°Π»ΡΠ½ΡΡΡΡ Π²ΡΠ΄ΠΊΡΠΈΡΡΡ ΠΏΡΠ΄Π³ΠΎΡΠΎΠ²ΠΊΠΈ Π² Π²ΡΠ·Π°Ρ
ΠΡΠ»ΠΎΡΡΡΡ ΠΏΡΠΎΠ³ΡΠ°ΠΌΡΡΡΡΠ² Π³Π΅ΠΎΠ΄Π΅Π·ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΡΡΠ»Ρ.=The relevance of the opening of training in the universities of Belarus for geodetic programmers is shown
GAMMA-RAY SPECTROMETRY OF HOT PLASMAS
Gamma-ray spectrometry provides diagnostics of fast ion behavior in plasmas of large tokamaks. Information acquiring with the gamma-ray diagnostics gives possibility to identify and distinguish simultaneously presence of fast alpha-particles and other ions He), to obtain its relative densities and also to perform tomographic radial profile reconstruction of the gammaemission sources
Radioluminescence properties of nanocomposite scintillators with BaF 2 fillers
In this paper, studies of the luminescence properties of nanocrystalline BaF 2 samples synthesized by laser ablation and pulse electron beam evaporation method are presented. The measurements of X-ray excited luminescence (XEL) showed the dependence between luminescence intensity and the shape of the spectrum on the morphology and particle size. Also, studies of X-ray excited luminescence, decay curves and optical transmittance for nanocomposite materials containing BaF 2 nanopowder are presented. Barium fluoride nanopowder, obtained by pulsed electron beam evaporation method is characterized by a lower intensity than the initial microcrystalline powder, but at the same time, XEL spectrum of the nanocomposite material with this nanocrystalline filler is more intense, then that for nanocomposite material with initial powder. Β© Published under licence by IOP Publishing Ltd
Ultrafast hybrid nanocomposite scintillators: A review
In recent years, demand for scintillation detectors with high time resolution (better than 100 ps) has emerged in high-energy physics and medical imaging applications. In particular, time of flight positron emission tomography (TOF-PET) can greatly benefit from increasing time resolution of scintillators, which leads to the increase of signal-to-noise ratio, decrease of patient dose, and achievement of the superior spatial resolution of PET images. Currently, extensive research of various types of materials is carried out to achieve the best time resolution. In this review, the recent progress of various approaches is summarized and scintillation compounds with the best temporal characteristics are first reviewed. The review presents the physical processes causing fast luminescence in inorganic and organic materials. Special attention is paid to nanocomposites which belong to a new perspective class of scintillating materials, consisting of a plastic matrix, inorganic nanocrystalline fillers, and organic or inorganic luminescence activators and shifters. The main features and functions of all parts of existing and prospective nanocomposite scintillators are also discussed. A number of currently created and investigated nanocomposite materials with various compounds and structures are reviewed. Β© 2021 Elsevier B.V.Eesti Teadusagentuur,Β ETAg: PRG111,Β PRG629;Β European Regional Development Fund,Β ERDF: 2014-2020.4.01.15β0011,Β TK141Authors thank Minobrnauki project FEUZ-2020-0059 and Estonian Research Council (grants PRG629 and PRG111 ) for financial support. Authors are also grateful for partial support from the European Regional Development Fund (DoRA Pluss program) and the ERDF funding in Estonia granted to the Center of Excellence TK141 β Advanced materials and high-technology devices for sustainable energetics, sensorics and nanoelectronics β (project No. 2014-2020.4.01.15β0011 )
Coherent Cherenkov radiation as an intense THz source
Diffraction and Cherenkov radiation of relativistic electrons from a dielectric target has been proposed as mechanism for production of intense terahertz (THz) radiation. The use of an extremely short high-energy electron beam of a 4th generation light source (X-ray free electron laser) appears to be very promising. A moderate power from the electron beam can be extracted and converted into THz radiation with nearly zero absorption losses. The initial experiment on THz observation will be performed at CLARA/VELA FEL test facility in the UK to demonstrate the principle to a wider community and to develop the radiator prototype. In this paper, we present our theoretical predictions (based on the approach of polarization currents), which provides the basis for interpreting the future experimental measurements. We will also present our hardware design and discuss a plan of the future experiment
Π‘ΠΈΠ½Π΄ΡΠΎΠΌ ΠΏΠ°ΡΠΎΠΊΡΠΈΠ·ΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΈΠΌΠΏΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΠ°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ (ΠΎΠ±Π·ΠΎΡ)
Paroxysmal sympathetic hyperactivity (PSH) is one of the complications of acute severe brain injuries (traumatic brain injury, intracranial hemorrhage, ischemia, and posthypoxic conditions) in both adults and children. Its high incidence and severe sequelae including organ dysfunction, infectious complications, impaired blood supply to organs and tissues associate with increased disability and mortality. The choice of effective therapy can be challenging because of multifaceted manifestations, diagnostic diο¬culties, and lack of a clear understanding of the pathophysiology of PSH. Currently, there are various local and international treatment strategies for PSH.The aim of the review is to summarize clinical and scientific research data on diagnosis and treatment of PSH to aid in the selection of an effective therapy.Material and methods. Web of Science, Scopus and RSCI databases were employed to select 80 sources containing relevant clinical and research data on the subject of this review.Results. The key principles of diagnosis and treatment of paroxysmal sympathetic hyperactivity have been reviewed. The current views on etiology and pathogenesis of paroxysmal sympathetic hyperactivity development were outlined. The clinical data concerning complications and sequelae of paroxysmal sympathetic hyperactivity were analyzed. We conclude the review with a discussion of current methods of the syndrome prevention.Conclusion. Preventing PSH and its adequate and prompt treatment could help avoid the abnormal pathway development following a severe brain injury, reduce its negative consequences and rate of complications, along with the duration of mechanical lung ventilation, patient's stay in ICU, disability and mortality rates. Careful selection of pathogenetic, symptomatic and supportive therapy significantly improves the rehabilitation potential of patients.ΠΠ΄Π½ΠΈΠΌ ΠΈΠ· ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΠΉ ΠΎΡΡΡΠΎΠ³ΠΎ ΡΡΠΆΠ΅Π»ΠΎΠ³ΠΎ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΡ ΠΌΠΎΠ·Π³Π° (ΡΠ΅ΡΠ΅ΠΏΠ½ΠΎ-ΠΌΠΎΠ·Π³ΠΎΠ²Π°Ρ ΡΡΠ°Π²ΠΌΠ°, Π²Π½ΡΡΡΠΈΡΠ΅ΡΠ΅ΠΏΠ½ΡΠ΅ ΠΊΡΠΎΠ²ΠΎΠΈΠ·Π»ΠΈΡΠ½ΠΈΡ, ΠΈΡΠ΅ΠΌΠΈΡ, ΠΏΠΎΡΡΠ³ΠΈΠΏΠΎΠΊΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ) ΠΊΠ°ΠΊ Ρ Π²Π·ΡΠΎΡΠ»ΡΡ
, ΡΠ°ΠΊ ΠΈ Ρ Π΄Π΅ΡΠ΅ΠΉ ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΠ°Π·Π²ΠΈΡΠΈΠ΅ ΡΠΈΠ½Π΄ΡΠΎΠΌΠ° ΠΏΠ°ΡΠΎΠΊΡΠΈΠ·ΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΈΠΌΠΏΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΠ°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ (ΠΠ‘ΠΠ). ΠΡΡΠΎΠΊΠ°Ρ ΡΠ°ΡΡΠΎΡΠ° Π΅Π³ΠΎ Π²ΡΡΡΠ΅ΡΠ°Π΅ΠΌΠΎΡΡΠΈ ΠΈ ΡΡΠΆΠ΅Π»ΡΠ΅ Π½Π΅Π³Π°ΡΠΈΠ²Π½ΡΠ΅ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΠ²ΠΈΡ: ΠΎΡΠ³Π°Π½Π½Π°Ρ Π΄ΠΈΡΡΡΠ½ΠΊΡΠΈΡ, ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΎΠ½Π½ΡΠ΅ ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΡ, Π½Π°ΡΡΡΠ΅Π½ΠΈΡ ΡΡΠΎΡΠΈΠΊΠΈ ΠΎΡΠ³Π°Π½ΠΎΠ² ΠΈ ΡΠΊΠ°Π½Π΅ΠΉ, ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡ ΠΊ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΠΈΠ½Π²Π°Π»ΠΈΠ΄ΠΈΠ·Π°ΡΠΈΠΈ ΠΈ ΡΠΌΠ΅ΡΡΠ½ΠΎΡΡΠΈ. Π‘Π»ΠΎΠΆΠ½ΠΎΡΡΠΈ Π² ΠΏΠΎΠ΄Π±ΠΎΡΠ΅ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΡΠ΅ΡΠ°ΠΏΠΈΠΈ ΡΠ²ΡΠ·Π°Π½Ρ Ρ ΠΌΠ½ΠΎΠ³ΠΎΠΎΠ±ΡΠ°Π·ΠΈΠ΅ΠΌ ΡΠΈΠΌΠΏΡΠΎΠΌΠΎΠ², ΡΡΡΠ΄Π½ΠΎΡΡΡΠΌΠΈ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠΈ, ΠΎΡΡΡΡΡΡΠ²ΠΈΠ΅ΠΌ ΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ½ΠΈΠΌΠ°Π½ΠΈΡ ΠΏΠ°ΡΠΎΡΠΈΠ·ΠΈΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΠ‘ΠΠ. Π Π½Π°ΡΡΠΎΡΡΠ΅Π΅ Π²ΡΠ΅ΠΌΡ ΡΡΡΠ΅ΡΡΠ²ΡΡΡ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠ΅ Π·Π°ΡΡΠ±Π΅ΠΆΠ½ΡΠ΅ ΠΈ ΠΎΡΠ΅ΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΠ΅ ΡΡ
Π΅ΠΌΡ Π»Π΅ΡΠ΅Π½ΠΈΡ ΠΠ‘ΠΠ.Π¦Π΅Π»Ρ ΠΎΠ±Π·ΠΎΡΠ° β ΠΎΠ±ΠΎΠ±ΡΠΈΡΡ Π΄Π°Π½Π½ΡΠ΅ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ Π½Π°ΡΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΏΠΎ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠ΅ ΠΈ Π»Π΅ΡΠ΅Π½ΠΈΡ ΡΠΈΠ½Π΄ΡΠΎΠΌΠ° ΠΠ‘ΠΠ Π΄Π»Ρ ΠΎΠ±Π»Π΅Π³ΡΠ΅Π½ΠΈΡ ΠΏΠΎΠ΄Π±ΠΎΡΠ° ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΡΠ΅ΡΠ°ΠΏΠΈΠΈ.ΠΠ°ΡΠ΅ΡΠΈΠ°Π». Π Π±Π°Π·Π°Ρ
Π΄Π°Π½Π½ΡΡ
Web of Science, Scopus ΠΈ Π ΠΠΠ¦ ΠΎΡΠΎΠ±ΡΠ°Π»ΠΈ 80 ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΎΠ², ΡΠΎΠ΄Π΅ΡΠΆΠ°Π²ΡΠΈΡ
Π°ΠΊΡΡΠ°Π»ΡΠ½ΡΠ΅ Π΄Π°Π½Π½ΡΠ΅ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ Π½Π°ΡΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΏΠΎ ΡΠ΅ΠΌΠ΅ Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΠΎΠ±Π·ΠΎΡΠ°.Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π»ΠΈ ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ ΠΏΡΠΈΠ½ΡΠΈΠΏΡ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠΈ ΠΈ Π»Π΅ΡΠ΅Π½ΠΈΡ ΠΏΠ°ΡΠΎΠΊΡΠΈΠ·ΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΈΠΌΠΏΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΠ°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ; ΠΎΠΏΠΈΡΠ°Π»ΠΈ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΎΠ± ΡΡΠΈΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΈ ΠΏΠ°ΡΠΎΠ³Π΅Π½Π΅Π·Π΅ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΠΏΠ°ΡΠΎΠΊΡΠΈΠ·ΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΈΠΌΠΏΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΠ°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ; ΠΏΡΠΈΠ²Π΅Π»ΠΈ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π΄Π°Π½Π½ΡΠ΅, ΠΊΠ°ΡΠ°ΡΡΠΈΠ΅ΡΡ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΠΉ ΠΏΠ°ΡΠΎΠΊΡΠΈΠ·ΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΈΠΌΠΏΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΠ°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ; ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π»ΠΈ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΠ²ΠΈΡ ΠΈ ΠΎΠΏΠΈΡΠ°Π»ΠΈ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΏΡΠΎΡΠΈΠ»Π°ΠΊΡΠΈΠΊΠΈ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΡΠΈΠ½Π΄ΡΠΎΠΌΠ° ΠΏΠ°ΡΠΎΠΊΡΠΈΠ·ΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΈΠΌΠΏΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΠ°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ.ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅. ΠΡΠΎΡΠΈΠ»Π°ΠΊΡΠΈΠΊΠ° ΡΠ°Π·Π²ΠΈΡΠΈΡ ΠΠ‘ΠΠ, Π΅Π³ΠΎ Π°Π΄Π΅ΠΊΠ²Π°ΡΠ½ΠΎΠ΅ ΠΈ ΡΠ²ΠΎΠ΅Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ΅ Π»Π΅ΡΠ΅Π½ΠΈΠ΅ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡ ΠΏΡΠ΅Π΄ΠΎΡΠ²ΡΠ°ΡΠΈΡΡ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠΉ Π΄ΠΎΠΌΠΈΠ½Π°Π½ΡΡ (ΠΌΡ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΠΌ ΠΠ‘ΠΠ ΠΈΠΌΠ΅Π½Π½ΠΎ ΠΊΠ°ΠΊ ΠΎΠ΄Π½Ρ ΠΈΠ· ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
Π΄ΠΎΠΌΠΈΠ½Π°Π½Ρ, ΡΠΎΡΠΌΠΈΡΡΡΡΠΈΡ
ΡΡ ΠΏΡΠΈ ΡΡΠΆΠ΅Π»ΠΎΠΌ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠΈ ΠΠ), ΡΠΌΠ΅Π½ΡΡΠΈΡΡ Π½Π΅Π³Π°ΡΠΈΠ²Π½ΡΠ΅ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΠ²ΠΈΡ ΡΡΠΎΠ³ΠΎ ΡΠΈΠ½Π΄ΡΠΎΠΌΠ°, ΡΠ½ΠΈΠ·ΠΈΡΡ ΡΠΈΡΠ»ΠΎ ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΠΉ, Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΡ ΠΠΠ ΠΈ ΠΏΡΠ΅Π±ΡΠ²Π°Π½ΠΈΡ Π±ΠΎΠ»Ρ- Π½ΠΎΠ³ΠΎ Π² ΠΠ ΠΠ’, ΠΈΠ½Π²Π°Π»ΠΈΠ΄ΠΈΠ·Π°ΡΠΈΡ ΠΈ ΡΠΌΠ΅ΡΡΠ½ΠΎΡΡΡ. ΠΠΎΠ΄Π±ΠΎΡ ΠΏΠ°ΡΠΎΠ³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ, ΡΠΈΠΌΠΏΡΠΎΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ, Π° Π·Π°ΡΠ΅ΠΌ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΈΠ²Π°ΡΡΠ΅ΠΉ ΡΠ΅ΡΠ°ΠΏΠΈΠΈ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΡΠ»ΡΡΡΠ°Π΅Ρ ΡΠ΅Π°Π±ΠΈΠ»ΠΈΡΠ°ΡΠΈΠΎΠ½Π½ΡΠΉ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π» ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ²
Disperse aqueous systems based on (S)-lysine in a wide range of concentrations and physiologically important temperatures
Β© 2017, Springer Science+Business Media, LLC, part of Springer Nature. It was shown for the first time using a complex of physicochemical methods (dynamic and electrophoretic light scattering, nanoparticle tracking analysis, transmission electron and atomic force microscopy, conductometry, pH-metry) that in a temperature range of 25β60 Β°Π‘ (S)-lysine aqueous solutions (1β’10 β17 β1β’10 β2 mol L β1 ) are disperse systems, where the nature and parameters of the disperse phase change with dilution, which affects the nonmonotonic dependences of the specific conductivity and pH of the system. Nanoassociates hundreds of nanometers in size were found to contain ordered water structures that are responsible for the size and ΞΆ-potential of the disperse phase in the aqueous systems and also participate in the formation of spatially organized systems on the support
New Debris Disks Around Nearby Main Sequence Stars: Impact on The Direct Detection of Planets
Using the MIPS instrument on the Spitzer telescope, we have searched for
infrared excesses around a sample of 82 stars, mostly F, G, and K main-sequence
field stars, along with a small number of nearby M stars. These stars were
selected for their suitability for future observations by a variety of
planet-finding techniques. These observations provide information on the
asteroidal and cometary material orbiting these stars - data that can be
correlated with any planets that may eventually be found. We have found
significant excess 70um emission toward 12 stars. Combined with an earlier
study, we find an overall 70um excess detection rate of % for mature
cool stars. Unlike the trend for planets to be found preferentially toward
stars with high metallicity, the incidence of debris disks is uncorrelated with
metallicity. By newly identifying 4 of these stars as having weak 24um excesses
(fluxes 10% above the stellar photosphere), we confirm a trend found in
earlier studies wherein a weak 24um excess is associated with a strong 70um
excess. Interestingly, we find no evidence for debris disks around 23 stars
cooler than K1, a result that is bolstered by a lack of excess around any of
the 38 K1-M6 stars in 2 companion surveys. One motivation for this study is the
fact that strong zodiacal emission can make it hard or impossible to detect
planets directly with future observatories like the {\it Terrestrial Planet
Finder (TPF)}. The observations reported here exclude a few stars with very
high levels of emission, 1,000 times the emission of our zodiacal cloud,
from direct planet searches. For the remainder of the sample, we set relatively
high limits on dust emission from asteroid belt counterparts
Study of runaway electron dynamics at the ASDEX Upgrade tokamak during impurity injection using fast hard x-ray spectrometry
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