Results 11 to 20 of about 17,868,026 (137)

Spatiotemporal evolution of radio wave pump-induced ionospheric phenomena near the fourth electron gyroharmonic [PDF]

, 2007
On 12 November 2001, the European Incoherent Scatter (EISCAT) high-frequency (HF) radio wave transmitter facility, operating in O-mode at 5.423 MHz with 550 MW effective radiated power, produced artificial optical rings which appeared immediately at ...
Kosch, Mike J., Ashrafi, M., Isham, B., Kaila, K.   +3 more
core   +4 more sources

Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence [PDF]

, 2003
In recent years, large electron temperature increases of 300% (3000 K above background) caused by powerful HF-radio wave injection have been observed during nighttime using the EISCAT incoherent scatter radar near Tromsø in northern Norway.
Rietveld, M. T., Kosch, M., Leyser, T., Kosch, Mike J., Rietveld, M., Leyser, T. B., Blagoveshchenskaya, N., Blagoveshchenskaya, N. F., Kornienko, V. A., Yeoman, T. K., Kornienko, V., Yeoman, T.   +11 more
core   +5 more sources

Coordinated optical and radar observations of ionospheric pumping for a frequency pass through the second electron gyroharmonic at HAARP [PDF]

, 2007
On 4 February 2005, the High-frequency Active Auroral Research Program (HAARP) facility was operated in O and X mode while pointing into the magnetic zenith to produce artificial optical emissions in the ionospheric F layer. The pump frequency was set to
Senior, Andrew, Pedersen, T., Kosch, Mike J., Bristow, B., Mishin, E., Watkins, B., Hughes, J., Oyama, S.   +7 more
core   +4 more sources

Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer [PDF]

, 2006
International audienceA high frequency (HF) ionospheric modification experiment was carried out between 25 September and 8 October 2004, using the EISCAT HF transmitter located near Tromsø, Norway.
Khudukon, B. Z., Rietveld, Michael T., Yurik, R.Yu, Brekke, A., M. Grill, A. Brekke, Tereshchenko, E., Khudukon, B., Rietveld, M., M. T. Rietveld, B. Isham, Belyey, Vasyl, Khudukon, B.Z., Tereshchenko, E.D., R. Yu. Yurik, T. Hagfors, Belyey, V., Isham, B., Hagfors, T., B. Z. Khudukon, Brekke, Asgeir, Rietveld, M. T., V. Belyey, Grill, M., Yurik, R. Yu., Yurik, R., Tereshchenko, E. D., E. D. Tereshchenko   +27 more
core   +4 more sources

A new digital surface crack image monitoring technology for coal failure

Energy Science &Engineering, Volume 11, Issue 6, Page 2096-2109, June 2023., 2023
The laboratory coal specimen and the coal wall of the coal mining face will have associated electromagnetic radiation and cracks under the condition of stress failure, and the change rules of the two are relatively consistent. According to the surface crack propagation law of the specimen, the development of cracks in the mining face is deduced, which ...
Yankui Li, Xiaoguang Qiao, Baisheng Nie, Shiyue Wu, Tao Zhao, Yuxi Huang, Xinghua Zhang   +6 more
wiley   +1 more source

High-latitude artificial aurora using the EISCAT high-gain HF facility [PDF]

, 2002
The EISCAT high-frequency (HF) transmitter facility at Ramfjord, Norway, has been used to accelerate F-region electrons sufficiently to excite the oxygen atoms and nitrogen molecules, resulting in optical emissions at 630, 557.7 and 427.8 nm.
Rietveld, M. T., Senior, A., Kavanagh, A. J., Isham, B., Kosch, M. J., McCrea, I. W., Honary, F., Kaila, K., Jussila, J., Holma, H., Hagfors, T.   +10 more
core   +4 more sources

On the location and structure of the artificial 630-nm airglow patch over Sura facility [PDF]

, 2007
International audienceResults are presented of the artificial optical emission of the atomic oxygen red line (the radiation of level O(1D) with a wavelength of 630 nm) from the HF-pumped ionosphere, obtained in September 2004 at the SURA heating facility
Atroshenko, M. A., Grach, S. M., Kotov, P. V., M. A. Atroshenko, Yashnov, V. A., Kosch, M. J., Sergeev, E. N., M. J. Kosch, S. M. Grach, P. V. Kotov, E. N. Sergeev, V. A. Yashnov   +11 more
core   +5 more sources

ISOLATION AND CHARACTERIZATION OF HIGH AMBIENT ELECTROMAGNETIC RADIATION (EMR) BACTERIA

Malaysian applied biology, 2020
Low-frequency electromagnetic radiation (EMR) exists in our environment and remain unnoticeable. Studies show that EMR exposure may affect human health, animal, plants, and also living microorganisms.
N. A. Badaluddin, Seet Yong Yin, Roslan Umar, N. Sabri, N. Hasshim, Mohammad Ali, A. Mohamed   +6 more
semanticscholar   +1 more source

Persistent enhancement of the HF pump-induced plasma line measured with a UHF diagnostic radar at HAARP [PDF]

, 2006
Plasma lines excited by a powerful, high-frequency (HF) radio wave are studied using data obtained with an ultrahigh frequency (UHF) radar at HAARP (High Frequency Active Auroral Research Program) from 3 to 5 February 2005.
Bernhardt, P. A., Heinselman, C. J., Kosch, Mike J., Djuth, F. T., Watkins, B. J., Oyama, S.   +5 more
core   +4 more sources

An interferometer experiment to explore the aspect angle dependence of stimulated electromagnetic emission spectra [PDF]

, 2005
International audienceWhen the Earth's ionosphere is irradiated by a radiofrequency (RF) electromagnetic wave of sufficiently high power density and tuned to match a natural E- or F-region plasma frequency, ionospheric magnetoionic wave modes may be ...
Khudukon, B. Z., Rietveld, Michael T., Yurik, R.Yu, Brekke, A., Belyey, Tereshchenko, Tereshchenko, E., Khudukon, B., Rietveld, M., Hoz, C. La, Belyey, Vasyl, Tereshchenko, E.D., Hagfors, Yurik, R. Yu., Khudukon, Yu. Yurik, Heinselman, C., Grill, Brekke, Belyey, V., Isham, B., Rietveld, Hagfors, T., Heinselman, Brekke, Asgeir, Rietveld, M. T., La Hoz, C., Isham, null La Hoz, Grill, M., Yurik, Yu., null null, Yurik, R. Yu., Yurik, R., La Hoz, Cesar, Tereshchenko, E. D., La Hoz   +36 more
core   +2 more sources