132 research outputs found
Observation of asymmetric spectrum broadening induced by silver nanoparticles in a heavy-metal oxide glass
We demonstrate experimentally and support by a theoretical analysis an effect
of asymmetric spectrum broadening, which results from doping of silver
nanoparticles into a heavy-glass matrix, 90(0.5WO3-0.3SbPO4-0.2PbO)-10AgCl. The
strong dispersion of the effective nonlinear coefficient of the composite
significantly influences the spectral broadening via the self-phase modulation,
and leads to a blue upshift of the spectrum. Further extension of the spectrum
towards shorter wavelengths is suppressed by a growing loss caused by the
plasmon resonance in the silver particles. The red-edge spectral broadening is
dominated by the stimulated Raman Scattering.Comment: Accepted for publishing epl13477; EPL Journal 201
Routes to multiphoton double ionization in combined extreme ultraviolet and infrared laser pulses
Xenon multiphoton double ionization pathways are studied in a reaction microscope using a pump-probe arrangement of extreme ultraviolet high harmonic and infrared laser radiation. The momentum of photoelectrons is recorded in coincidence with singly or doubly charged ions. Among all possible routes to multiphoton double ionization, sequential processes using ionic excited states as intermediate steps are clearly identified
Communication: XUV transient absorption spectroscopy of iodomethane and iodobenzene photodissociation
Time-resolved extreme ultraviolet (XUV) transient absorption spectroscopy of
iodomethane and iodobenzene photodissociation at the iodine pre-N4,5 edge is
presented, using femtosecond UV pump pulses and XUV probe pulses from high
harmonic generation. For both molecules the molecular core-to-valence
absorption lines fade immediately, within the pump-probe time-resolution.
Absorption lines converging to the atomic iodine product emerge promptly in
CH3I but are time-delayed in C6H5I. We attribute this delay to the initial Ο β
Ο* excitation in iodobenzene, which is distant from the iodine reporter atom.
We measure a continuous shift in energy of the emerging atomic absorption
lines in CH3I, attributed to relaxation of the excited valence shell. An
independent particle model is used to rationalize the observed experimental
findings
Reaching the nonlinear regime of Raman amplification of ultrashort laser pulses
The intensity of a subpicosecond laser pulse was amplified by a factor of up to 1000 using the Raman backscatter interaction in a 2 mm long gas jet plasma. The process of Raman amplification reached the nonlinear regime, with the intensity of the amplified pulse exceeding that of the pump pulse by more than an order of magnitude. Features unique to the nonlinear regime such as gain saturation, bandwidth broadening, and pulse shortening were observed. Simulation and theory are in qualitative agreement with the measurements.open695
Multiorder coherent Raman scattering of a quantum probe field
We study the multiorder coherent Raman scattering of a quantum probe field in
a far-off-resonance medium with a prepared coherence. Under the conditions of
negligible dispersion and limited bandwidth, we derive a Bessel-function
solution for the sideband field operators. We analytically and numerically
calculate various quantum statistical characteristics of the sideband fields.
We show that the multiorder coherent Raman process can replicate the
statistical properties of a single-mode quantum probe field into a broad comb
of generated Raman sidebands. We also study the mixing and modulation of photon
statistical properties in the case of two-mode input. We show that the prepared
Raman coherence and the medium length can be used as control parameters to
switch a sideband field from one type of photon statistics to another type, or
from a non-squeezed state to a squeezed state and vice versa.Comment: 12 pages, 7 figures, to be published in Phys. Rev.
Disability quotas: past or future policy?
This article considers the issues associated with the use of quota systems for the employment of workers with a disability. It examines the use and experiences of such quotas in Italy, Russia and the United Kingdom. Italy has a long established quota for the employment of such workers, whilst the modern Russian system it is a more recent innovation. In contrast the UK abandoned its quotas in the 1990s. We draw on the experiences of the three countries to consider generally whether the use of quotas is either an acceptable means of encouraging employers to take on disabled workers, or is necessary to achieve this objective
ΠΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΡΠ°ΡΠΏΡΠΎΡΡΡΠ°Π½Π΅Π½ΠΈΡ ΠΏΠΎΠ΄ΠΏΠΎΠ²Π΅ΡΡ Π½ΠΎΡΡΠ½ΡΡ ΠΈ ΠΏΠΎΠ²Π΅ΡΡ Π½ΠΎΡΡΠ½ΡΡ Π²ΠΎΠ»Π½ Π² ΠΎΠ±ΡΠ΅ΠΊΡΠ°Ρ ΡΠΎ ΡΠ»ΠΎΠΈΡΡΠΎΠΉ ΡΡΡΡΠΊΡΡΡΠΎΠΉ. Π§. 1. ΠΠ»ΠΈΡΠ½ΠΈΠ΅ Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΎΠ±ΡΠ΅ΠΊΡΠ°
Application of surface and subsurface waves for control of objects with a double-layer structure allows to extend possibilities of diagnostics of their physico-mechanical properties. The purpose of work was to determine conditions and offer recommendations providing measuring of ultrasonic velocity and amplitude of the former modes in protective layers and in basis of object at one-sided access to its surface.The analysis of an acoustic path of a measuring system in relation to ultrasonic evaluation of the objects having the restricted sizes and the protective coating according to velocity data of the surface and subsurface waves propagation is made. On the basis of representations of beam acoustics the dependences connecting a wavelength of the excited surface and subsurface modes, thickness and width of a controlled object, acoustic base of a sounding are defined. There are to provide a condition leveling of the influence of an acoustical noise created by the reflected and accompanying waves on parameters of acoustic signal with the given quantity of oscillations in an impulse.The principle opportunity is shown and conditions for determination of velocity of subsurface body waves in the base material which is under a protective coating layer are established. For these purposes on the basis of use of the block of ultrasonic probes the optimum scheme of a sounding is offered and the analytical expression for calculation of required velocity considering varying of thickness of a covering is received.The method of acoustical measuring realized by a direct and reverse sounding of the objects with small aperture and angle probes was analysed and formulas for determination of speed of subsurface wave under protective layer of the wedge form have been got. An ultrasonic device is suggested for the excitationreception of subsurface waves with different speed in objects (on 20β35 %) using for the acoustic concordance of environments of metallic sound duct as a wedge. Possibility of leveling of interference in a protective layer to control efects in basis of material by a volume wave by creation of supporting echo-signal of longitudinal wave of the set frequency and entered normally to the surface of object was studied.ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
ΠΈ ΠΏΠΎΠ΄ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
Π²ΠΎΠ»Π½ Π΄Π»Ρ ΠΊΠΎΠ½ΡΡΠΎΠ»Ρ ΠΈΠ·Π΄Π΅Π»ΠΈΠΉ Ρ Π΄Π²ΡΡ
ΡΠ»ΠΎΠΉΠ½ΠΎΠΉ ΡΡΡΡΠΊΡΡΡΠΎΠΉ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΡΠ°ΡΡΠΈΡΠΈΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠΈΠ·ΠΈΠΊΠΎ-ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ². Π¦Π΅Π»Ρ ΡΠ°Π±ΠΎΡΡ ΡΠΎΡΡΠΎΡΠ»Π° Π² ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΠΈ ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΠΈ Π²ΡΠ΄Π°ΡΠ΅ ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°ΡΠΈΠΉ, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°ΡΡΠΈΡ
ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠ΅ ΡΠΊΠΎΡΠΎΡΡΠΈ ΠΈ Π°ΠΌΠΏΠ»ΠΈΡΡΠ΄Ρ ΡΠΏΡΡΠ³ΠΈΡ
ΠΌΠΎΠ΄ Π² Π·Π°ΡΠΈΡΠ½ΠΎΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠΈ ΠΈ Π² ΠΎΡΠ½ΠΎΠ²Π΅ ΠΎΠ±ΡΠ΅ΠΊΡΠ° ΠΏΡΠΈ ΠΎΠ΄Π½ΠΎΡΡΠΎΡΠΎΠ½Π½Π΅ΠΌ Π΄ΠΎΡΡΡΠΏΠ΅ ΠΊ Π΅Π³ΠΎ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ.ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΈΠΉ Π»ΡΡΠ΅Π²ΠΎΠΉ Π°ΠΊΡΡΡΠΈΠΊΠΈ ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½ Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΡΠ°ΠΊΡ ΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ ΡΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΠΌΠ΅ΠΆΠ΄Ρ Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌΠΈ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ², Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π±Π°Π·ΠΎΠΉ ΠΏΡΠΎΠ·Π²ΡΡΠΈΠ²Π°Π½ΠΈΡ, Π΄Π»ΠΈΠ½ΠΎΠΉ Π²ΠΎΠ»Π½Ρ ΡΠΏΡΡΠ³ΠΈΡ
ΠΌΠΎΠ΄, ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²ΠΎΠΌ ΠΎΡΡΠΈΠ»Π»ΡΡΠΈΠΉ Π² ΠΈΠΌΠΏΡΠ»ΡΡΠ΅, Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΡΠ΅ Π΄Π»Ρ Π½ΠΈΠ²Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΡΠΌΠ° ΠΏΡΠΈ Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΡΡ
.ΠΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΡΠΎΠΏΠΎΡΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ Π΄Π°Π½Π½ΡΡ
ΡΠ°ΡΡΠ΅ΡΠ½ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ Ρ ΠΎΠΏΡΡΠ½ΡΠΌΠΈ Π΄Π°Π½Π½ΡΠΌΠΈ, ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΡΠΌΠΈ Π΄Π»Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΎΠΏΠΎΡΠ½ΡΡ
Π΄Π»Ρ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΡ
ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΡΠΊΠΎΡΠΎΡΡΠΈ ΡΠΏΡΡΠ³ΠΈΡ
ΠΌΠΎΠ΄, Π°ΠΌΠΏΠ»ΠΈΡΡΠ΄Ρ, ΡΠΏΠ΅ΠΊΡΡΠ° ΡΠΈΠ³Π½Π°Π»Π° ΠΈ Π΄Ρ. ΠΠ·ΡΡΠ΅Π½Ρ ΡΡΠ»ΠΎΠ²ΠΈΡ ΡΡΡΡΠ°Π½Π΅Π½ΠΈΡ ΠΏΠ°ΡΠ°Π·ΠΈΡΠ½ΠΎΠ³ΠΎ Π²Π»ΠΈΡΠ½ΠΈΡ Π²ΡΠ°ΡΠ°ΡΡΠΈΡ
ΡΡ ΠΌΠΎΠ΄ Π½Π° ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΠΏΡΠΈ ΠΎΡΠ΅Π²ΠΎΠΌ ΠΏΡΠΎΠ·Π²ΡΡΠΈΠ²Π°Π½ΠΈΠΈ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠΉ Π²ΠΎΠ»Π½ΠΎΠΉ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΎΠ±ΡΠ΅ΠΊΡΠ°.ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½ ΡΠΏΠΎΡΠΎΠ± ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ, ΡΠ΅Π°Π»ΠΈΠ·ΡΠ΅ΠΌΡΠΉ ΠΏΡΡΠ΅ΠΌ ΠΏΡΡΠΌΠΎΠ³ΠΎ ΠΈ ΠΎΠ±ΡΠ°ΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ·Π²ΡΡΠΈΠ²Π°Π½ΠΈΡ ΠΎΠ±ΡΠ΅ΠΊΡΠ° ΠΌΠ°Π»ΠΎΠ°ΠΏΠ΅ΡΡΡΡΠ½ΡΠΌΠΈ ΠΈ Π½Π°ΠΊΠ»ΠΎΠ½Π½ΡΠΌΠΈ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»ΡΠΌΠΈ, ΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΡ Π΄Π»Ρ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΡΠΊΠΎΡΠΎΡΡΠΈ ΠΏΠΎΠ΄ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠΉ Π²ΠΎΠ»Π½Ρ ΠΏΠΎΠ΄ Π·Π°ΡΠΈΡΠ½ΡΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠ΅ΠΌ Π² Π²ΠΈΠ΄Π΅ ΠΊΠ»ΠΈΠ½Π°. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ΠΎ ΡΠ»ΡΡΡΠ°Π·Π²ΡΠΊΠΎΠ²ΠΎΠ΅ ΡΡΡΡΠΎΠΉΡΡΠ²ΠΎ Π΄Π»Ρ Π²ΠΎΠ·Π±ΡΠΆΠ΄Π΅Π½ΠΈΡ-ΠΏΡΠΈΠ΅ΠΌΠ° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
Π²ΠΎΠ»Π½ Ρ ΡΠ°Π·Π½ΠΎΠΉ ΡΠΊΠΎΡΠΎΡΡΡΡ ΡΠ°ΡΠΏΡΠΎΡΡΡΠ°Π½Π΅Π½ΠΈΡ Π² ΠΎΠ±ΡΠ΅ΠΊΡΠ°Ρ
(ΠΈΠ·ΠΌΠ΅Π½ΡΡΡΠ΅ΠΉΡΡ Π½Π° 20β35 %), ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡΠ΅Π΅ Π΄Π»Ρ Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΠ³Π»Π°ΡΠΎΠ²Π°Π½ΠΈΡ ΡΡΠ΅Π΄ ΠΌΠ΅ΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π·Π²ΡΠΊΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π° Π² Π²ΠΈΠ΄Π΅ ΠΊΠ»ΠΈΠ½Π°. ΠΠ·ΡΡΠ΅Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π½ΠΈΠ²Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π²Π»ΠΈΡΠ½ΠΈΡ ΠΈΠ½ΡΠ΅ΡΡΠ΅ΡΠ΅Π½ΡΠΈΠΈ Π² Π·Π°ΡΠΈΡΠ½ΠΎΠΌ ΡΠ»ΠΎΠ΅ Π½Π° Π²ΡΡΠ²Π»ΡΠ΅ΠΌΠΎΡΡΡ Π΄Π΅ΡΠ΅ΠΊΡΠΎΠ² Π² ΠΎΡΠ½ΠΎΠ²Π΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° ΠΎΠ±ΡΠ΅ΠΌΠ½ΠΎΠΉ Π²ΠΎΠ»Π½ΠΎΠΉ ΠΏΡΡΠ΅ΠΌ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΠΎΠΏΠΎΡΠ½ΠΎΠ³ΠΎ ΡΡ
ΠΎ-ΡΠΈΠ³Π½Π°Π»Π° ΠΏΡΠΎΠ΄ΠΎΠ»ΡΠ½ΠΎΠΉ Π²ΠΎΠ»Π½Ρ Π·Π°Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°ΡΡΠΎΡΡ ΠΈ Π²Π²ΠΎΠ΄ΠΈΠΌΠΎΠΉ Π½ΠΎΡΠΌΠ°Π»ΡΠ½ΠΎ ΠΊ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΎΠ±ΡΠ΅ΠΊΡΠ°
Test Results of Fuel Additive in the Boiler with Grate Firing of Coal
Π Π½Π°ΡΡΠΎΡΡΠ΅Π΅ Π²ΡΠ΅ΠΌΡ Π² ΠΎΡΠ΅ΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΡΠ΅ΠΏΠ»ΠΎΡΠ½Π΅ΡΠ³Π΅ΡΠΈΠΊΠ΅ ΠΎΡΡΡΡΡΡΠ²ΡΠ΅Ρ ΠΎΠΏΡΡ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ
ΡΠΎΠΏΠ»ΠΈΠ²Π½ΡΡ
ΠΏΡΠΈΡΠ°Π΄ΠΎΠΊ Π΄Π»Ρ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΎΠΏΠ»ΠΈΠ²ΠΎΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π² ΡΠ³ΠΎΠ»ΡΠ½ΡΡ
ΠΊΠΎΡΠ»Π°Ρ
.
ΠΠ΄Π½Π°ΠΊΠΎ Π·Π° ΡΡΠ±Π΅ΠΆΠΎΠΌ Π΄Π°Π½Π½ΠΎΠ΅ Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΆΠΈΠ³Π°Π½ΠΈΡ ΡΠ²Π΅ΡΠ΄ΡΡ
ΡΠΎΠΏΠ»ΠΈΠ²
ΠΏΠΎΠ»ΡΡΠΈΠ»ΠΎ ΡΠΈΡΠΎΠΊΠΎΠ΅ ΡΠ°ΡΠΏΡΠΎΡΡΡΠ°Π½Π΅Π½ΠΈΠ΅, ΡΡΠΎ, Π² ΠΏΠ΅ΡΠ²ΡΡ ΠΎΡΠ΅ΡΠ΅Π΄Ρ, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½ΠΎ ΠΏΠΎΠΈΡΠΊΠΎΠΌ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ
Β«ΡΠΊΠΎΠ»ΠΎΠ³ΠΈΠ·Π°ΡΠΈΠΈΒ» ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Β«Π³ΡΡΠ·Π½ΠΎΠ³ΠΎΒ» ΡΠ³Π»Ρ. Π ΡΡΠ°ΡΡΠ΅ ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡΡΡ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΏΡΠΎΠΌΡΡΠ»Π΅Π½Π½ΡΡ
ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΠΎΠΉ ΡΠΎΠΏΠ»ΠΈΠ²Π½ΠΎΠΉ ΠΏΡΠΈΡΠ°Π΄ΠΊΠΈ ΠΊΠ°ΡΠ°Π»ΠΈΠ·ΠΈΡΡΡΡΠ΅Π³ΠΎ ΠΈ ΠΌΠΎΠ΄ΠΈΡΠΈΡΠΈΡΡΡΡΠ΅Π³ΠΎ Π΄Π΅ΠΉΡΡΠ²ΠΈΡ
Π½Π° ΡΠ³ΠΎΠ»ΡΠ½ΠΎΠΌ ΠΊΠΎΡΠ»Π΅ ΠΠ-Ρ-11.63-115 Π² ΠΎΠ΄Π½ΠΎΠΉ ΠΈΠ· ΠΊΠΎΡΠ΅Π»ΡΠ½ΡΡ
Π³. ΠΠΎΠ²ΠΎΠΊΡΠ·Π½Π΅ΡΠΊΠ° ΠΠ΅ΠΌΠ΅ΡΠΎΠ²ΡΠΊΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ.
ΠΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌ ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ Π·Π°ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΎ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΠ΅ ΠΊ.ΠΏ.Π΄. Π±ΡΡΡΡΠΎ ΠΊΠΎΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ Π°Π³ΡΠ΅Π³Π°ΡΠ°
Π½Π° 5,1 % (Π°Π±Ρ.) ΠΏΡΠΈ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠ΅ΠΌ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠΈ ΡΠ°ΡΡ
ΠΎΠ΄Π° ΡΡΠ»ΠΎΠ²Π½ΠΎΠ³ΠΎ ΡΠΎΠΏΠ»ΠΈΠ²Π° Π½Π° Π²ΡΡΠ°Π±ΠΎΡΠΊΡ
Π΅Π΄ΠΈΠ½ΠΈΡΡ ΡΠ΅ΠΏΠ»ΠΎΠ²ΠΎΠΉ ΡΠ½Π΅ΡΠ³ΠΈΠΈ. ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΏΡΠΈΡΠ°Π΄ΠΊΠΈ ΠΏΡΠΈΠ²Π΅Π»ΠΎ ΡΠ°ΠΊΠΆΠ΅ ΠΊ ΠΎΡΠΈΡΡΠΊΠ΅ ΡΠΊΡΠ°Π½Π½ΡΡ
ΡΡΡΠ± ΠΎΡ
ΡΠ»ΠΎΡ Π½Π°ΡΡΡΠ±Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ ΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΡΡΡΠΊΡΡΡΡ ΠΎΠ±ΡΠ°Π·ΡΡΡΠ΅Π³ΠΎΡΡ ΠΏΡΠΈ ΡΠ³ΠΎΡΠ°Π½ΠΈΠΈ ΡΠ³Π»Ρ ΡΠ»Π°ΠΊΠ°,
ΠΊΠΎΡΠΎΡΡΠΉ ΡΡΠ°Π» Π±ΠΎΠ»Π΅Π΅ ΠΎΠ΄Π½ΠΎΡΠΎΠ΄Π½ΡΠΌ ΠΈ Π±Π΅Π· ΠΎΡΠ°Π³ΠΎΠ² Π°Π³Π»ΠΎΠΌΠ΅ΡΠ°ΡΠΈΠΈNow the domestic heat-and-power engineering has no experience of use of fuel additives to
increase efficiency of fuel usage in coal boilers. However abroad this direction of increase in
efficiency of combustion of solid fuels has been widely adopted, that, first of all, is caused by
search of technologies for βecologizationβ of use of βdirtyβ coal. The article contains the results
of industrial tests of complex fuel additive of catalyzing and modifying action in the coal boiler
KV-r-11.63-115 in one of the boiler houses in Novokuznetsk, Kemerovo region. The test results
showed increase in gross efficiency of the boiler unit for 5,1 % (abs.) along with the corresponding
decrease in consumption of coal fuel to produce one unit of heat energy. Application of the
additive also led to cleaning of furnace tube from a layer of deposits and changing of structure of
slag formed at combustion of coal which became more homogeneous and without agglomeration
center
Africaβs response to the COVID-19 pandemic : A review of the nature of the virus, impacts and implications for preparedness
Background: COVID-19 continues to wreak havoc in different countries across the world, claiming thousands of lives, increasing morbidity and disrupting lifestyles. The global scientific community is in urgent need of relevant evidence, to understand the challenges and knowledge gaps, as well as the opportunities to contain the spread of the virus. Considering the unique socio-economic, demographic, political, ecological and climatic contexts in Africa, the responses which may prove to be successful in other regions may not be appropriate on the continent. This paper aims to provide insight for scientists, policy makers and international agencies to contain the virus and to mitigate its impact at all levels. Methods: The Affiliates of the African Academy of Sciences (AAS), came together to synthesize the current evidence, identify the challenges and opportunities to enhance the understanding of the disease. We assess the potential impact of this pandemic and the unique challenges of the disease on African nations. We examine the state of Africaβs preparedness and make recommendations for steps needed to win the war against this pandemic and combat potential resurgence. Results: We identified gaps and opportunities among cross-cutting issueswhich must be addressed or harnessed in this pandemic. Factors such as the nature of the virus and the opportunities for drug targeting, point of care diagnostics, health surveillance systems, food security, mental health, xenophobia and gender-based violence, shelter for the homeless, water and sanitation, telecommunications challenges, domestic regional coordination and financing. Conclusion: Based on our synthesis of the current evidence, while there are plans for preparedness in several African countries, there are significant limitations. A multi-sectoral efforts from the science, education, medical, technology, communication, business, and industry sectors, as well as local communities, must work collaboratively to assist countries in order to win this fight
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