495 research outputs found
Position-sensitive detector for the 6-meter optical telescope
The Position-Sensitive Detector (PSD) for photometrical and spectral
observation on the 6-meter optical telescope of the Special Astrophysical
Observatory (Russia) is described. The PSD consists of a position-sensitive
tube, amplifiers of output signals, analog-to-digital converters (ADC) and a
digital logic plate, which produces a signal for ADC start and an external
strob pulse for reading information by registration system. If necessary, the
thermoelectric cooler can be used. The position-sensitive tube has the
following main elements: a photocathode, electrodes of inverting optics, a
block of microchannel plates (MCP) and a position-sensitive collector of
quadrant type. The main parameters of the PSD are the diameter of the sensitive
surface is 25 mm, the spatial resolution is better than 100 (\mu)m in the
centre and a little worse on the periphery; the dead time is near 0.5 (\mu)s;
the detection quantum efficiency is defined by the photocathode and it is not
less than 0.1, as a rule; dark current is about hundreds of cps, or less, when
cooling. PSD spectral sensitivity depends on the type of photocathode and input
window material. We use a multialkali photocathode and a fiber or UV-glass,
which gives the short- wave cut of 360 nm or 250 nm, respectively.Comment: 4 pages, 7 figures, to be published in Nuclear Instruments & Methods
in Physics Researc
Cooperation in R&D as a leading indicator of innovative activity growth
Purpose: The article is focused on new trends in cooperation activity in research and development in the manufacturing industries of Russia. Various types of cooperation are considered, special attention is paid to research organizations and universities.
Design/Methodology/Approach: In the context of this issue, it seems necessary to consider the conceptual framework and information basis for the analysis of scientific activity, to study the problems of scientific and technical cooperation, based on the works of foreign and domestic scientists and to develop indicators of cooperative activities.
Finding: Authors proposed to rank the regions of Russia by the level of cooperation activity based on a specially developed hidden indicator. Comparison of the results obtained with regional layers of the costs of R&D suggests that joint research and development activities are typical for those regions that pay considerable attention to development of science. Ranking regions of Russia in terms of cooperative activity allowed identifying the leaders and outsiders of this process.
Practical implications: The results of the study can be used in the development of measures of regional development of the country in the implementation of R&D.
Originality/Value: To study the impact of the resource base on the cooperative activities of the organization, the authors proposed a composite indicator that includes a wide range of indicators that consider various aspects of cooperative activity.This work was supported by a grant of Russian Foundation for Basic Research №18-010-00564 Modern Tendencies and Social and Economic Consequences of Digital Technologies Development in Russia.peer-reviewe
Current status of cosmological MDM model
An analysis of cosmological models in spatially flat Friedmann Universe with
cosmic gravitational wave background and zero -term is presented. The
number of free parameters is equal to 5, they are , ,
, , and . The normalization of the spectrum of density
perturbations on galaxy cluster abundance () has been
used to calculate numerically the value of the large scale CMB anisotropy
() and the relative contribution of cosmological gravitational
waves T/S. Increasing weaken the requirements to the value of T/S,
however even for the models with suggest
considerable abundance of gravitational waves: T/S. In models
with and scale-invariant spectrum of density perturbations
(): T/S. Minimization of the value T/S is possible
only in the range of the red spectra () and small (). It is
shown that the models with T/S admit both moderate red and blue
spectra of density perturbations, , with rather high abundance
hot dark matter, . Any condition, or
, decreases the relative amplitude of the first acoustic peak
for more than 30% in comparison with its hight in the standard CDM normalized
by COBE data.Comment: 4 pages, 2 figures included; contribution to the Proceedings of
Moriond 2000 "Energy Densities in the Universe", Les Arcs, France, January
22-29 200
Crowd voting via online platforms as a way of citizens’ public participation in the development of municipalities (The active citizen case, Moscow)
Based on the theory of S. Arnstein, the paper considers crowd voting as one of the management levels available to citizens. The authors analyzed the Moscow online voting platform Active Citizen. Proceeding from the open data on the platform, the authors composed the socio-demographic profile of users, evaluated the proportion of active participation, the extent of their engagement in the voting processes depending on the themes of the problems brought to the attention of the townspeople
Effect of initial microtopography and ultrasonic treatment mode on steel surface layer quality
The article presents results of studies on the effect of pre-lathed surface micro-relief on surface micro-hardness after ultrasonic plastic treatment, as well as the effect of ultrasonic treatment on structure and properties of surface layers of steels 20 and 40X. The effect of ultrasonic treatment processing modes on roughness and micro-hardness of the surface layers was studied. It is shown that roughness values as well as form of ridges and grooves, obtained by pre-lathing, effect the growth of micro-hardness values after ultrasonic plastic treatment
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