Results 41 to 50 of about 3,039,671 (230)

Dynamics and spatio-temporal distribution of geomagnetic disturbances during periods of increased solar activity and magnetic storms [PDF]

E3S Web of Conferences, 2020
A detailed spatio-temporal analysis of magnetic data was performed during the periods of magnetic storms on October 02, 2013 and September 27, 2019 based on measurements of the station network.
Mandrikova Oksana, Rodomanskay Anastasia
doaj   +1 more source

Determining Wind Shear Threshold by Using Historical Sounding Data in Experimental Area

Atmosphere
This paper conducts a technical study on a method for determining the occurrence threshold of wind shear based on historical sounding data. After analyzing the impact of low-altitude wind shear on aircraft flight safety, a method for determining the ...
Tingting Shu, Qinglin Zhu, Xiang Dong, Houcai Chen, Leke Lin, Xuan Liu   +5 more
doaj   +1 more source

Magnetic location of a possible earthquake epicentre area: a mathematical model

Geomatics, Natural Hazards & Risk, 2016
We study one of the problems of the theory of seismo-electromagnetic methods of earthquake prediction, namely, the physical nature of magnetic location of a future epicentre.
O.B. Novik, S.V. Ershov, M.N. Volgin, A.O. Novik   +3 more
doaj   +1 more source

Lidar diagnostics of ionosphere precipitations

E3S Web of Conferences, 2018
Lidar is considered as an electron energy detector of ionosphere precipitations, and the cleaning of radiation belts is like the energy pumping of the ionosphere layer.
Shevtsov Boris, Perezhogin Andrey, Seredkin Ilya   +2 more
doaj   +1 more source

Changes of geoacoustic emission directivity at «Mikizha» site associated with earthquakes in Kamchatka

E3S Web of Conferences, 2016
To investigate high frequency geoacoustic emission, a receiving system based on a compound vector receiver was installed in Kamchatka. It allows the authors to determine the direction of sound wave arrival.
Marapulets Yuriy, Solodchuk Alexandra, Shcherbina Albert   +2 more
doaj   +1 more source

Indoor 3-D RT Radio Wave Propagation Prediction Method: PL and RSSI Modeling Validation by Measurement at 4.5 GHz

Electronics, 2019
This article introduces an efficient analysis of indoor 4.5 GHz radio wave propagation by using a proposed three-dimensional (3-D) ray-tracing (RT) modeling and measurement. The attractive facilities of this frequency band have significantly increased in
Ferdous Hossain, Tan Kim Geok, Tharek Abd. Rahman, Mohammad Nour Hindia, K. Dimyati, Sharif Ahmed, Chih-Ping Tso, Azlan Abdaziz, W. Lim, Azwan Mahmud, Tan Choo Peng, Chia Pao Liew, V. Thiruchelvam   +12 more
semanticscholar   +1 more source

Reconfigurable wideband patch antenna for cognitive radio [PDF]

, 2009
Cognitive radio communication is envisaged to be a new paradigm of methodologies for enhancing the performance of radio communication systems through the efficient utilization of radio spectrum.
AbuTarboush, HF, D. Budimir, Khan, S, Budimir, D, S. Khan, H. F. Abu Tarboush, R. Nilavalan, Nilavalan, R., Budimir, D., Khan, S., Nilavalan, R, Al-Raweshidy, H.S., AbuTarboush, H.F., Al-Raweshidy, H, H. S. Al-Raweshidy   +14 more
core   +1 more source

Diagnostics of geomagnetically-induced currents in high-tension electric transmission lines [PDF]

E3S Web of Conferences, 2019
The problem of geomagnetically-induced currents (GIC) effect on electrotechnical systems is topical as long as uninterrupted power distribution is critically important for all the spheres of human activity.
Sivokon Vladimir, Cherneva Nina, Malkin Evgeniy   +2 more
doaj   +1 more source

Radio Wave Propagation [PDF]

Nature, 1963
Monograph on Radio-Wave Propagation in the Troposphere Proceedings of Commission II on Radio and Troposphere during the XIIIth General Assembly of URSI, London, September 1961. Edited by J. A. Saxton. Pp. viii + 200. (Amsterdam and New York: Elsevier Publishing Company, 1962.) 48s. Monograph on Ionospheric Radio XIIIth General Assembly of URSI, London,
openaire   +1 more source

A reciprocity related result and its application to radio wave propagation

, 2006
Copyright © 2006 IEEEIn the paper, we consider a reciprocity related result that incorporates perturbations in the propagation medium.
C.J. Coleman, Coleman, C.
core   +1 more source