Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
71
18
2012
ANALYSIS OF REFRACTION PROPERTIES OF THE TROPOSPHERE USING A RADIO INTERFEROMETER
1627-1634
10.1615/TelecomRadEng.v71.i18.10
Stanislav I.
Khomenko
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
G. I.
Khlopov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine
D. D.
Khalameyda
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
refraction
interferometer
geostationary satellite
gradient of refraction factor
exponential model of troposphere
The results of the six-month cycle of measurements of the refraction factor gradient of the troposphere that were taken during the winter to the summer period are presented. The results are based on measurements of the angle of arrival taken using a radio interferometer that
receives radio signals from the geostationary Earth satellite Asiasat 3S. Analysis has been
performed and the results obtained have been confirmed. Some phenomena that occur in the troposphere and result in abnormally large values of the refraction factor gradient that we observed during measurements have been investigated.
SCATTERING OF ANHARMONIC SIGNALS ON FINITE-LENGTH DIFFRACTION LATTICES OF ARBITRARY PROFILE
1635-1642
10.1615/TelecomRadEng.v71.i18.20
S. E.
Shaldaev
Scientific Research Center, Branch of Federal State Institution "4 Central Scientific Research Institute of the Ministry of Defense", St. Petersburg, Russian Federation
diffraction
periodic structure
ultrabroadband pulse
The aperture method was used to obtain general expressions for calculating the scattered field characteristics on finite-length diffraction lattices of arbitrary profile which scatter both harmonic and anharmonic signals. Examples of calculations of ultrabroadband pulse (UBBP) responses are
given.
METHOD FOR RECOGNITION OF SIGNALS IN COLOR FACSIMILE MESSAGES UNDER THE CONDITIONS OF INTERFERENCE
1643-1650
10.1615/TelecomRadEng.v71.i18.30
A. V.
Varganov
Kursk State technical University, Kursk, Russian Federation
A. S.
Sizov
Federal State Unitary Enterprise, Kursk Research Institute, Russian Ministry of Defense, Kursk, Russian Federation
recognition reliability
proximity function
color facsimile message
A method and an algorithm for recognition of color facsimile messages under the conditions of
interference, based on the procedure of incomplete syntax analysis and a proximity function, are proposed. Results of theoretical investigations of the recognition reliability of the proposed method are presented.
PRINCIPLES OF PREDICTION OF INFORMATION PROTECTION IN THE COMMUNICATION NETWORK
1651-1663
10.1615/TelecomRadEng.v71.i18.40
E. A.
Lidskii
Institute of Radioelectronics, Ural State Technical University-Ural Polytechnic Institute, Yekaterinburg, Russian Federation
U. A.
Mikhaleva
Institute of Radioelectronics, Ural State Technical University-Ural Polytechnic Institute, Yekaterinburg, Russian Federation
vulnerability
database
information security
attack
protection
payoff matrix
estimation
efficiency
software
threat
An active method for combating unauthorized intrusion into the communication network operation is discussed. Preventive measures are planned based on known data on vulnerability of software products. An open NVD database is used. The most dangerous threats are predicted in the form of a game between two partners: the attacker and the defender. The game results in recommendations on information protection for the studied program system.
A HIGH-EFFICIENCY METHOD OF DETECTION OF FAST NEUTRONS FOR DETECTION SYSTEMS OF FISSIONABLE RADIOACTIVE MATERIALS
1665-1686
10.1615/TelecomRadEng.v71.i18.50
V. D.
Ryzhikov
STC for Radiation Instruments of STC "Institute for Single Crystals", Kharkov; Institute for Scintillation Materials of NAS of Ukraine, Kharkiv; NSC "Institute of Metrology", Kharkiv, Ukraine State Customs Service of Ukraine, Kyiv, Ukraine
B. V.
Grynyov
Institute for Scintillation Materials of NAS of Ukraine, Kharkiv; NSC "Institute of Metrology", Kharkiv, Ukraine State Customs Service of Ukraine, Kyiv, Ukraine
G. M.
Onishchenko
Institute for Scientillation Materials, Science Technology Center "Institute for Single Crystals", National Academy of Science of Ukraine, Kharkiv; V. Karazin National University of Kharkiv, 4, Svoboda Sq., Kharkiv, 61077, Ukraine
L. A.
Piven
Institute for Scientillation Materials, Science Technology Center "Institute for Single Crystals", National Academy of Science of Ukraine, Kharkiv
O. K.
Lysetska
Institute for Scientillation Materials, Science Technology Center "Institute for Single Crystals", National Academy of Science of Ukraine, Kharkiv
L. L.
Nagornata
Institute for Scientillation Materials, Science Technology Center "Institute for Single Crystals", National Academy of Science of Ukraine, Kharkiv
I. M.
Zenya
Institute for Scientillation Materials, Science Technology Center "Institute for Single Crystals", National Academy of Science of Ukraine, Kharkiv
A. Y.
Berezhnoy
Institute of High-Energy Physics and Nuclear Physics, NSC Kharkiv Institute of Physics and Technology NAS of Ukraine, Kharkiv
detection efficiency
fast neutrons
inelastic scattering
inspection systems
fissionable
heavy oxide scintillators
neutron detector
Comparative measurements and detection efficiency analysis were carried out for fast neutrons from 239Pu-Be source in a broad energy range of En ∼ 0.1 ÷ 10 MeV using oxide scintillators BiGe3O12, Gd2SiO5, CdWO4, ZnWO4, ZnSe(Te,O) as well as NaI(TI), Csl(TI) and 6LiI(Eu). The experimentally obtained fast neutron detection efficiency by heavy inorganic (oxide) scintillators (Z ≥ 50) reaches ∼ 40-50%. One of the most probable mechanisms ensuring such high efficiency of fast neutron by oxide scintillators is the inelastic scattering reaction (n,n'γ) . It is concluded that heavy oxide scintillators, which at the same time are efficient gamma-detector, allow creation of a highly efficient gamma-neutron detector, which ensures high efficiency of detection of fissionable radioactive materials./i
THE IONOSPHERIC PRECURSOR TO THE 2011 MARCH 11 EARTHQUAKE AS BASED ON THE JAPAN-PACIFIC SUBIONOSPHERIC VLF/LF NETWORK OBSERVATION
1687-1706
10.1615/TelecomRadEng.v71.i18.60
Masashi
Hayakawa
Hayakawa Institute of Seismo Electromagnetics Co. Ltd.(Hi-SEM), The University of Electro-Communications (UEC) Alliance Center #521, Advanced & Wireless and Communications Research Center, UEC, Chofu, Tokyo, 182-8585, Japan
Y.
Hobara
Research Station on Seismo Electromagnetics; UEC, Graduate School of Informatics and Engineering, Chofu Tokyo, Japan
A.
Rozhnoi
Institute of Physics of the Earth, Russian Academy of Sciences, 10 Gruzinskaya, Moscow 123810, Russia
M.
Solovieva
Institute of Physics of the Earth, Russian Academy of Sciences, 10 Gruzinskaya, Moscow 123810, Russia
K.
Ohta
Chubu University, 1200 Matsumoto-cho, Kasugai Aichi 487-8501, Japan
J.
Izutsu
Chubu University, 1200 Matsumoto-cho, Kasugai Aichi 487-8501, Japan
T.
Nakamura
Kochi University, Akebono-cho, Kochi, Japan
Y.
Yasuda
Hayakawa Institute of Seismo-Electromagnetics, Co. Ltd., UEC Incubation Center, Chofu Tokyo, Japan
H.
Yamaguchi
Earthquake Analysis Laboratory, Information Systems Inc., Kita-aoyama 2-12-42- 305, Minato-ku Tokyo 107-0061, Japan
Y.
Kasahara
UEC, Graduate School of Informatics and Engineering, Chofu Tokyo, Japan
ionospheric precursor
VLF/LF propagation
2011/03/11 Japan EQ
By using the network observations of sub-ionospheric VLF/LF signals in Japan and Russia, we found a significant ionospheric perturbation prior to the 2011/3/11 Japan earthquake (EQ). A remarkable decrease was detected in the nighttime amplitude and increase in the dispersion on March 5 and 6, on the paths from NLK (Seattle, USA) to Chofu, Kochi and Kasugai. We found also the anomalies in March 1-6 period and minima in the nighttime amplitude on March 3 and 4 on the path JJI (Miyazaki, Kyushu) - Kamchatka, Russia. We describe perturbations and discuss the relevant geophysical environment. Data are compared with perturbations of many inland EQs, and with the spatial scale of similar oceanic Sumatra EQ in 2004. The generation mechanism of ionospheric perturbations is outlined.
ULF MAGNETIC FIELD DEPRESSION AS A POSSIBLE PRECURSOR TO THE 2011/3.11JAPAN EARTHQUAKE
1707-1718
10.1615/TelecomRadEng.v71.i18.70
A. Yu.
Schekotov
Schmidt Institute of Earth Physics, Russian Academy of Sciences, 10 B. Gruzinskaya St., Moscow, 123995, Russia
E. I.
Fedorov
Institute of Physics of the Earth, Russian Academy of Sciences, 10, Bolshaya Gruzinskaya, 124995, Moscow, Russia
Y.
Hobara
Research Station on Seismo Electromagnetics; UEC, Graduate School of Informatics and Engineering, Chofu Tokyo, Japan
Masashi
Hayakawa
Hayakawa Institute of Seismo Electromagnetics Co. Ltd.(Hi-SEM), The University of Electro-Communications (UEC) Alliance Center #521, Advanced & Wireless and Communications Research Center, UEC, Chofu, Tokyo, 182-8585, Japan
earthquakes (EQs)
short-term precursors
ULF magnetic field depression
seismo-ionospheric depression
seismo- electromagnetics
The depression (reduction in amplitude) of ULF magnetic field variations of magnetospheric origin is studied at various distances from the epicenter of the strongest earthquake (EQ) which occurred in Japan on March 11, 2011. For this purpose, we have used the ULF data in Japan
observed by fluxgate magnetometers at three places located at distances of ∼ 300 km to ∼ 1300 km from the epicenter of the main shock. The period of data analysis is from December 1, 2010 to May 31, 2011. We have found a sharp increase in depression of the horizontal ULF magnetic field component at the frequency of 0.03 - 0.05 Hz (30-50 mHz) at all of three Japanese observatories (Kakioka, Memambetsu and Kanoya) three days before the
first strong foreshock (Mω = 7.5) and five days before the main shock (Mω = 9). This peak in depression is found to be several times greater than all previous values, but the depression seems to be most enhanced at Kakioka, the station nearest to the EQ epicenter. So that it is likely that this phenomenon could be a possible precursor to the huge 3.11 EQ.