1,299 research outputs found
Report of the Terrestrial Bodies Science Working Group. Volume 7: The Galilean satellites
The formational and evolutionary history of natural satellites, their mineralogical composition and other phenomena of scientific interest are discussed. Key scientific questions about IO, Ganymede, Callisto, and Europa are posed and the measurements and instruments required for a Galilean satellite lander in the 1980's are described
Report of the Terrestrial Bodies Science Working Group. Volume 2: Mercury
The objectives and rationale for scientific investigation of Mercury are explored. Knowledge already obtained by astronomical observations and Mariner 10 spacecraft is reviewed and measurements required for the principal scientific goals are described. The use of low thrust propulsion systems is recommended so that maximum scientific return may be achieved and the reconnaissance phase of Mercury exploration may be completed in a single mission. Accelerated development is recommended on solar electric propulsion, solar sails, passive and active cooling mechanisms, and single rough landers
Research of the thorium purification at monazite refinement processes
This paper is aimed to the research of the thorium purification processes at monazite refinement processes. We have investigated different solution containing thorium with different mix of rare-earth elements. It was found that the application of cation resin is well- recommended if we want to reach the highest yields of thorium purification process
Diffusion and Deformations in Heterosystems with GaN/AlN Superlattices, According to Data from EXAFS Spectroscopy
Multilayered samples with extremely narrow GaN
quantum wells in an AlN host are synthesized
via ammonia MBE. The parameters of the microstructu
re are determined by means of EXAFS spectroscopy,
high-resolution electron microscopy, and low-angle sc
attering. Their relationship to the morphology of
GaN/AlN superlattices is established. The influence of
growth conditions and the thickness of superlattices
on their optical properties and mixing in the near-boundary layers is established
Report of the Terrestrial Bodies Science Working Group. Volume 4: The moon
A rationale for furture exploration of the moon is given. Topics discussed include the objectives of the lunar polar orbiter mission, the mission profile, and general characteristics of the spacraft to be used
VETA x ray data acquisition and control system
We describe the X-ray Data Acquisition and Control System (XDACS) used together with the X-ray Detection System (XDS) to characterize the X-ray image during testing of the AXAF P1/H1 mirror pair at the MSFC X-ray Calibration Facility. A variety of X-ray data were acquired, analyzed and archived during the testing including: mirror alignment, encircled energy, effective area, point spread function, system housekeeping and proportional counter window uniformity data. The system architecture is presented with emphasis placed on key features that include a layered UNIX tool approach, dedicated subsystem controllers, real-time X-window displays, flexibility in combining tools, network connectivity and system extensibility. The VETA test data archive is also described
High surface area activated carbon prepared from wood-based spent mushroom substrate for supercapacitors and water treatment
Edible white-rot fungi are commonly cultivated on wood-based substrates and selectively degrade lignin to a larger extent during their growth. Spent mushroom substrate (SMS) is produced in huge amounts by the mushroom industry and today there is a lack of proven methods to valorize this kind of biomass waste, which in most cases is landfilled or used as fuel. This study demonstrates that birch wood-based SMS from the cultivation of oyster mushrooms can be converted into high-quality activated carbon (AC) with an extremely high surface area of about 3000 m2 /g. These activated carbons showed good performance when used in electrodes for supercapacitors, with energy storage parameters nearly identical to AC produced from high-quality virgin birch wood. Moreover, AC produced from SMS showed high potential as an adsorbent for cleaning reactive orange-16 azo dye from aqueous solutions as well as contaminants from synthetic effluents and from real sewage water. The kinetics of adsorption were well represented by the Avrami fractional order model and isotherms of adsorption by the Liu model. The theoretical maximum reactive orange-16 adsorption capacities were approximately 519 mg/g (SMS-based carbon) and 553 mg/g (virgin birch-based carbon). The removal of contaminants from synthetic effluents made of different dyes and inorganic compounds was around 95% and 83% depending on the effluent composition. The removal of contaminants from raw sewage water was around 84%, and from treated sewage water was around 68%. Overall, the results showed that activated carbon prepared from waste generated during cultivation of white-rot fungi is as good as activated carbon prepared from high-quality virgin wood
Hermitian Young Operators
Starting from conventional Young operators we construct Hermitian operators
which project orthogonally onto irreducible representations of the (special)
unitary group.Comment: 15 page
ΠΡΠ΅Π½ΠΊΠ° ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΊΠ°ΡΠΈΠΎΠ½ΠΈΡΠ° ΠΠ£-2-8 ΠΏΡΠΈ ΠΈΠ·Π²Π»Π΅ΡΠ΅Π½ΠΈΠΈ ΠΈΠΎΠ½ΠΎΠ² ΠΌΠ΅Π΄ΠΈ ΠΈΠ· Π²ΠΎΠ΄Ρ Π² ΠΏΡΠΈΡΡΡΡΡΠ²ΠΈΠΈ ΠΈΠΎΠ½ΠΎΠ² ΠΆΠ΅ΡΡΠΊΠΎΡΡΠΈ
ΠΠ°Π²Π΅Π΄Π΅Π½ΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ Π· Π²ΠΈΠ·Π½Π°ΡΠ΅Π½Π½Ρ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΊΠ°ΡΡΠΎΠ½ΡΡΡ ΠΠ£-2-8 ΠΏΡΠ΄ ΡΠ°Ρ Π²ΠΈΠ»ΡΡΠ΅Π½Π½Ρ ΠΉΠΎΠ½ΡΠ² ΠΌΡΠ΄Ρ Π· Π²ΠΎΠ΄ΠΈ Π² ΠΏΡΠΈΡΡΡΠ½ΠΎΡΡΡ ΠΉΠΎΠ½ΡΠ² ΠΆΠΎΡΡΡΠΊΠΎΡΡΡ Π·Π° Π½ΠΈΠ·ΡΠΊΠΈΡ
ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΡΠΉ ΠΉΠΎΠ½ΡΠ² ΠΌΡΠ΄Ρ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΠΎ Π² ΡΡΠ°ΡΠΈΡΠ½ΠΈΡ
ΡΠΌΠΎΠ²Π°Ρ
ΠΏΡΠΈ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΡΡ ΠΌΡΠ΄Ρ Π²ΡΠ΄ 1 Π΄ΠΎ 30 ΠΌΠ³/Π΄ΠΌ3 Π²ΠΈΠ»ΡΡΠ΅Π½Π½Ρ ΠΌΡΠ΄Ρ ΠΏΡΠΎΡ
ΠΎΠ΄ΠΈΡΡ Π½Π΅Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎ ΡΠΊ Π· Π΄ΠΈΡΡΠΈΠ»ΡΠΎΠ²Π°Π½ΠΎΡ, ΡΠ°ΠΊ Ρ Π· Π²ΠΎΠ΄ΠΎΠΏΡΠΎΠ²ΡΠ΄Π½ΠΎΡ Π²ΠΎΠ΄ΠΈ Π½Π΅Π·Π°Π»Π΅ΠΆΠ½ΠΎ Π²ΡΠ΄ ΡΠΎΡΠΌΠΈ ΠΉΠΎΠ½ΡΡΡ. ΠΠ°Π½ΠΈΠΉ ΠΏΠΎΠΊΠ°Π·Π½ΠΈΠΊ Π·Π½ΠΈΠΆΡΡΡΡΡΡ ΠΏΡΠ΄ ΡΠ°Ρ Π·Π±ΡΠ»ΡΡΠ΅Π½Π½Ρ ΠΎΠ±βΡΠΌΡ ΡΠΎΠ·ΡΠΈΠ½Ρ ΠΏΡΠΈ ΡΡΠΊΡΠΎΠ²Π°Π½ΠΎΠΌΡ ΠΎΠ±βΡΠΌΡ ΠΉΠΎΠ½ΡΡΡ. Π‘ΡΡΡΡΠ²ΠΎΠ³ΠΎ ΠΏΡΠ΄Π²ΠΈΡΠ΅Π½Π½Ρ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ Π²ΠΈΠ»ΡΡΠ΅Π½Π½Ρ ΠΉΠΎΠ½ΡΠ² ΠΌΡΠ΄Ρ Π½Π° Π΄Π°Π½ΠΎΠΌΡ ΠΊΠ°ΡΡΠΎΠ½ΡΡΡ Π΄ΠΎΡΡΠ³Π½ΡΡΠΎ Π² Π΄ΠΈΠ½Π°ΠΌΡΡΠ½ΠΈΡ
ΡΠΌΠΎΠ²Π°Ρ
ΠΏΡΠΈ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ ΠΉΠΎΠ½ΡΡΡ Π² ΠΊΠΈΡΠ»ΡΠΉ ΡΠ° ΡΠΎΠ»ΡΠΎΠ²ΡΠΉ ΡΠΎΡΠΌΡ Ρ Π½Π°ΡΠ²Π½ΠΎΡΡΡ Π² ΡΠΎΠ·ΡΠΈΠ½Ρ ΠΉΠΎΠ½ΡΠ² ΠΆΠΎΡΡΡΠΊΠΎΡΡΡ. ΠΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΠΎ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡΡΡ Π΄Π΅ΡΠΎΡΠ±ΡΡΡ ΠΉΠΎΠ½ΡΠ² ΠΌΡΠ΄Ρ ΡΠΎΠ·ΡΠΈΠ½Π°ΠΌΠΈ Ρ
Π»ΠΎΡΠΈΠ΄Π½ΠΎΡ ΠΊΠΈΡΠ»ΠΎΡΠΈ Π² ΡΡΠ°ΡΠΈΡΠ½ΠΈΡ
ΡΠΌΠΎΠ²Π°Ρ
Π±ΡΠ»Π° Π½ΠΈΠ·ΡΠΊΠΎΡ. Π Π΄ΠΈΠ½Π°ΠΌΡΡΠ½ΠΈΡ
ΡΠΌΠΎΠ²Π°Ρ
Π΄ΠΎΡΡΠ³Π½ΡΡΠΎ ΠΏΡΠ°ΠΊΡΠΈΡΠ½ΠΎ ΠΏΠΎΠ²Π½ΠΎΠ³ΠΎ Π²ΠΈΠ»ΡΡΠ΅Π½Π½Ρ ΠΉΠΎΠ½ΡΠ² ΠΌΡΠ΄Ρ ΡΠΎΠ·ΡΠΈΠ½Π°ΠΌΠΈ Ρ
Π»ΠΎΡΠΈΠ΄Π½ΠΎΡ ΠΊΠΈΡΠ»ΠΎΡΠΈ.The results of studies to determine the effectiveness of KU-2-8 cation extracting copper ions from water hardness ions in the presence of low concentrations of copper ions. It is shown that at concentration of copper from 1 to 30 mg/dm3 extraction of copper takes place in static conditions inefficiently both from distilled and from tap water irrespective of an ionite form. This indicator decreases at increase in volume of solution at the fixed ionite volume. Significant efficiency removal of copper ions in this cation achieved in dynamic conditions using resin in acid and salt form in the presence of ions in solution stiffness. It was established that the efficiency of desorption of copper ions hydrochloric acid solutions in static conditions was low. In dynamic conditions reached almost complete desorption of copper ions by solutions of hydrochloric acid.ΠΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΏΠΎ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΊΠ°ΡΠΈΠΎΠ½ΠΈΡΠ° ΠΠ£-2-8 ΠΏΡΠΈ ΠΈΠ·Π²Π»Π΅ΡΠ΅Π½ΠΈΠΈ ΠΈΠΎΠ½ΠΎΠ² ΠΌΠ΅Π΄ΠΈ ΠΈΠ· Π²ΠΎΠ΄Ρ Π² ΠΏΡΠΈΡΡΡΡΡΠ²ΠΈΠΈ ΠΈΠΎΠ½ΠΎΠ² ΠΆΠ΅ΡΡΠΊΠΎΡΡΠΈ ΠΏΡΠΈ Π½ΠΈΠ·ΠΊΠΈΡ
ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΡΡ
ΠΈΠΎΠ½ΠΎΠ² ΠΌΠ΅Π΄ΠΈ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π² ΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΏΡΠΈ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ ΠΌΠ΅Π΄ΠΈ ΠΎΡ 1 Π΄ΠΎ 30 ΠΌΠ³/Π΄ΠΌ3 ΠΈΠ·Π²Π»Π΅ΡΠ΅Π½ΠΈΠ΅ ΠΌΠ΅Π΄ΠΈ ΠΏΡΠΎΡ
ΠΎΠ΄ΠΈΡ Π½Π΅ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎ ΠΊΠ°ΠΊ ΠΈΠ· Π΄ΠΈΡΡΠΈΠ»Π»ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ, ΡΠ°ΠΊ ΠΈ ΠΈΠ· Π²ΠΎΠ΄ΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΎΠΉ Π²ΠΎΠ΄Ρ Π½Π΅Π·Π°Π²ΠΈΡΠΈΠΌΠΎ ΠΎΡ ΡΠΎΡΠΌΡ ΠΈΠΎΠ½ΠΈΡΠ°. ΠΠ°Π½Π½ΡΠΉ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Ρ ΡΠ½ΠΈΠΆΠ°Π΅ΡΡΡ ΠΏΡΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ ΠΎΠ±ΡΠ΅ΠΌΠ° ΡΠ°ΡΡΠ²ΠΎΡΠ° ΠΏΡΠΈ ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΌ ΠΎΠ±ΡΠ΅ΠΌΠ΅ ΠΈΠΎΠ½ΠΈΡΠ°. Π‘ΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΈΠ·Π²Π»Π΅ΡΠ΅Π½ΠΈΡ ΠΈΠΎΠ½ΠΎΠ² ΠΌΠ΅Π΄ΠΈ Π½Π° Π΄Π°Π½Π½ΠΎΠΌ ΠΊΠ°ΡΠΈΠΎΠ½ΠΈΡΠ΅ Π΄ΠΎΡΡΠΈΠ³Π½ΡΡΠΎ Π² Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΏΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠΈ ΠΈΠΎΠ½ΠΈΡΠ° Π² ΠΊΠΈΡΠ»ΠΎΠΉ ΠΈ ΡΠΎΠ»Π΅Π²ΠΎΠΉ ΡΠΎΡΠΌΠ΅ ΠΏΡΠΈ Π½Π°Π»ΠΈΡΠΈΠΈ Π² ΡΠ°ΡΡΠ²ΠΎΡΠ΅ ΠΈΠΎΠ½ΠΎΠ² ΠΆΠ΅ΡΡΠΊΠΎΡΡΠΈ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ Π΄Π΅ΡΠΎΡΠ±ΡΠΈΠΈ ΠΈΠΎΠ½ΠΎΠ² ΠΌΠ΅Π΄ΠΈ ΡΠ°ΡΡΠ²ΠΎΡΠ°ΠΌΠΈ ΡΠΎΠ»ΡΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ Π² ΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Π±ΡΠ»Π° Π½ΠΈΠ·ΠΊΠΎΠΉ. Π Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Π΄ΠΎΡΡΠΈΠ³Π½ΡΡΠΎ ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΈ ΠΏΠΎΠ»Π½ΠΎΠΉ Π΄Π΅ΡΠΎΡΠ±ΡΠΈΠΈ ΠΈΠΎΠ½ΠΎΠ² ΠΌΠ΅Π΄ΠΈ ΡΠ°ΡΡΠ²ΠΎΡΠ°ΠΌΠΈ ΡΠΎΠ»ΡΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ
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