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Use of unmanned aerial systems for communication and air mobility in Arctic region
Gennady V., Chechin,Valentin E., Kolesnichenko,Anton I., Selin Techno-Press 2022 Advances in aircraft and spacecraft science Vol.9 No.6
The current state of telecommunications infrastructure in the Arctic does not allow providing a wide range of required services for people, businesses and other categories, which necessitates the use of non-traditional approaches to its organization. The paper proposes an innovative approach to building a combined communication network based on tethered high-altitude platform station (HAPS) located at an altitude of 1-7 km and connected via radio channels with terrestrial and satellite communication networks. Network configuration and composition of telecommunication equipment placed on HAPS and located on the terrestrial and satellite segment of the network was justified. The availability of modern equipment and the distributed structure of such an integrated network will allow, unlike existing networks (Iridium, Gonets, etc.), to organize personal mobile communications, data transmission and broadband Internet up to 100 Mbps access for mobile and fixed subscribers, rapid transmission of information from Internet of Things (IoT) sensors and unmanned aerial vehicles (UAV). A substantiation of the possibility of achieving high network capacity in various paths is presented: inter-platform radio links, subscriber radio links, HAPS feeder lines - terrestrial network gateway, HAPS radio links - satellite retransmitter (SR), etc. The economic efficiency of the proposed solution is assessed.
Use of unmanned aerial systems for communication and air mobility in Arctic region
Gennady V., Chechin,Valentin E., Kolesnichenko,Anton I., Selin Techno-Press 2022 Advances in aircraft and spacecraft science Vol.9 No.6
The current state of telecommunications infrastructure in the Arctic does not allow providing a wide range of required services for people, businesses and other categories, which necessitates the use of non-traditional approaches to its organization. The paper proposes an innovative approach to building a combined communication network based on tethered high-altitude platform station (HAPS) located at an altitude of 1-7 km and connected via radio channels with terrestrial and satellite communication networks. Network configuration and composition of telecommunication equipment placed on HAPS and located on the terrestrial and satellite segment of the network was justified. The availability of modern equipment and the distributed structure of such an integrated network will allow, unlike existing networks (Iridium, Gonets, etc.), to organize personal mobile communications, data transmission and broadband Internet up to 100 Mbps access for mobile and fixed subscribers, rapid transmission of information from Internet of Things (IoT) sensors and unmanned aerial vehicles (UAV). A substantiation of the possibility of achieving high network capacity in various paths is presented: inter-platform radio links, subscriber radio links, HAPS feeder lines - terrestrial network gateway, HAPS radio links - satellite retransmitter (SR), etc. The economic efficiency of the proposed solution is assessed.
Gennady N. Vlaskin,Sergey V. Bedenko,Nima Ghal-Eh,Hector R. Vega-Carrillo 한국원자력학회 2021 Nuclear Engineering and Technology Vol.53 No.12
The 13C (a,n)16O reaction cross-section is important data for nuclear physics, astrophysical, and neutrinophysics experiments, however, they exhibit uncertainties due to the discrepancies in the experimentaldata. In this study, using the Nedis-2m program code, the energy spectrum of a-induced neutrons in athin carbon target was calculated and the corresponding reaction cross-section was refined in the alphaparticle energy range of 5e8 MeV. The results were used to calculate the intensity and energy spectrumof background neutrons produced in the liquid scintillator of KamLAND. The results will be useful in avariety of astrophysical and neutrino experiments especially those based on LS or Gd-LS detectors.
Novosibirsk Free Electron Laser—Facility Description and Recent Experiments
Kulipanov, Gennady N.,Bagryanskaya, Elena G.,Chesnokov, Evgeniy N.,Choporova, Yulia Yu,Gerasimov, Vasily V.,Getmanov, Yaroslav V.,Kiselev, Sergey L.,Knyazev, Boris A.,Kubarev, Vitali V.,Peltek, Sergey IEEE 2015 IEEE transactions on terahertz science and technol Vol.5 No.5
<P>The design and operational characteristics of the Novosibirsk free electron laser facility are described. Selected experiments in the terahertz range carried out recently at the user stations are surveyed in brief.</P>
Switched Reluctance Motors for Electric Drive of Overland Belt Conveyor
Ptakh, Gennady K.,Evsin, Nicholas F.,Zvezdunov, D. Alex,Rozhkov, Dmitry V.,Yakovenko, Alexander E. Journal of International Conference on Electrical 2014 Journal of international Conference on Electrical Vol.3 No.4
The parameters and operating characteristics of the switched reluctance motor (SRM) for the electric drive of the overland belt conveyor CLM-4500 have been presented. The motor power capacity has been equal to 1250 kW, the motor speed - 1000 min-1. SRM power supply has been provided by a three-phase voltage inverter and a 12-pulse rectifier circuit. The group electric drive has been installed on sections number 2 and 3, 3770 m and 3375 m length, respectively, on the areas of "Berezovsky Strip" JSC, a member of the Siberian Coal Energy Company.
Synthesis of polymer - based inverted opal and transformation of its optical properties
Masalov, Vladimir M.,Dolganov, Pavel V.,Sukhinina, Nadezhda S.,Dolganov, Vladimir K.,Emelchenko, Gennadi A. Techno-Press 2014 Advances in nano research Vol.2 No.1
We have obtained opal-like photonic crystals based on opals and inverted opals exhibiting a shift of the selective reflection band toward longer and shorter wavelengths with respect to the diffraction band of the initial opal consisting of $SiO_2$ spheres. The contribution of frames forming three-dimensional periodic structures and that of fillers to the spectral arrangement of the diffraction bands has been determined.
Yoon, Im Taek,Lee, Sejoon,Roshchupkin, Dmitry V.,Panin, Gennady N. American Scientific Publishers 2018 Journal of nanoscience and nanotechnology Vol.18 No.6
<P>The influence of quantum well structure and growth temperature on a synthesized multilayer system composed of a five-layer InMnGaAs quantum well with an InGaAs buffer layer grown on semi-insulating (100)-oriented substrates prepared by low temperature molecular beam epitaxy was studied. The magnetization measurements using a superconducting quantum interference device indicated the existence of ferromagnetism with a Curie temperature above room temperature in the five-layer InGaMnAs quantum well structure with an InGaAs buffer layer in a GaAs matrix. X-ray diffraction and secondary ion mass spectroscopy measurements confirmed the second phase formation of ferromagnetic GaMn clusters. The ferromagnetism that exists in the five-layer of the InMnGaAs quantum well with the InGaAs buffer layer results from a superposition of the ferromagnetism of the low temperature region from the substitutional Mn ions into Ga sites or interstitial Mn ions as well as the presence of manganese ions dopant clusters such as GaMn clusters.</P>
VLADIMIR M. MASALOV,ELENA A. KUDRENKO,NATALIA A. GRIGORYEVA,KSENIA V. EZDAKOVA,VLADIMIR V. RODDATIS,NADEZHDA S. SUKHININA,MIKHAIL V. AREFEV,ALEXANDER A. MISTONOV,SERGEI V. GRIGORIEV,GENNADI A. EMELCHE 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.4
Ultramicrotomy was used to prepare a cross-section of shell-like amorphous SiO2 spherical particle synthesized by the multistage Stöber method which allowed performing first direct observations of the hierarchical structure of the SiO2 particle by transmission and scanning electron microscopy. The presence of primary, secondary and tertiary particles forming the inner structure of SiO2 spheres was established. The use of the small angle scattering of neutrons and synchrotron radiation techniques has enabled to define the size of the primary particles, the fractal parameters of their surface and the bulk density of the SiO2 spheres.
Phonon anharmonicities in supported graphene
Kolesov, Egor A.,Tivanov, Mikhail S.,Korolik, Olga V.,Kapitanova, Olesya O.,Cho, Hak Dong,Kang, Tae Won,Panin, Gennady N. Elsevier 2019 Carbon Vol.141 No.-
<P><B>Abstract</B></P> <P>The paper presents temperature-dependent Raman studies of anharmonic phonon properties of graphene as-grown on copper, transferred to copper, SiO<SUB>2</SUB>/Si, and Al<SUB>2</SUB>O<SUB>3</SUB>, as well as nitrogen-doped graphene on SiO<SUB>2</SUB>/Si. Different G and 2D peak position and linewidth temperature dependencies were obtained in the temperature range of 20–294 K, upon which anharmonic constants for 3- and 4-phonon processes were determined. Values of anharmonic constants obtained from G peak shift for undoped graphene on dielectric substrates were quantitatively close to both experimental results for unsupported graphene and theoretical predictions reported in the literature, while the values for graphene as-grown on copper were almost two orders of magnitude greater. The results were analyzed in terms of substrate effect on phonon properties of graphene. The present study is useful for taking into account anharmonic phonon effects in graphene when designing graphene-based nanoelectronic devices.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>