Results 11 to 20 of about 2,180,154 (198)

Seismo‐ and Tsunami‐Traveling Ionospheric Disturbances of the 29 July 2025 M8.8 Kamchatka Earthquake Observed by CW‐HF Doppler Sounding Systems and Ionosondes in Taiwan and Japan

Geophysical Research Letters
Doppler frequency shifts (DFSs) recorded by continuous wave‐high frequency Doppler sounding systems and ionograms observed by five ionosondes in Taiwan and Japan are used to study three‐dimensionally seismo‐ and tsunami‐traveling ionospheric disturbances
Yao‐Chun Chen, Jann‐Yenq Liu, Tien‐Chi Liu, Katsumi Hattori, Jaroslav Chum, Chieh‐Hung Chen, Wen‐Yen Chang, Bor‐Shouh Huang, Rui Song, Horng‐Yuan Yen   +9 more
doaj   +2 more sources

DOPPLER BANDWIDTH CHARACTERIZATION OF ARTM CHANNEL SOUNDING DATA

, 1999
International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, NevadaData from ARTM channel sounding test flights is examined to characterize the dynamic channel behavior of aeronautical ...
Landon, David
core   +5 more sources

Acute hypoxia diminishes the relationship between blood pressure and subarachnoid space width oscillations at the human cardiac frequency. [PDF]

PLoS ONE, 2017
BACKGROUND:Acute hypoxia exerts strong effects on the cardiovascular system. Heart-generated pulsatile cerebrospinal fluid motion is recognised as a key factor ensuring brain homeostasis.
Magdalena Wszedybyl-Winklewska, Jacek Wolf, Ewa Swierblewska, Katarzyna Kunicka, Agnieszka Gruszecka, Marcin Gruszecki, Wieslawa Kucharska, Pawel J Winklewski, Joanna Zabulewicz, Wojciech Guminski, Michal Pietrewicz, Andrzej F Frydrychowski, Leszek Bieniaszewski, Krzysztof Narkiewicz   +13 more
doaj   +1 more source

Parameters of traveling ionospheric disturbances: results from spaced oblique HF sounding

Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2022
Urgency. A characteristic feature of the ionospheric radio channel is that its parameters depend on season, local time, solar activity, geographic coordinates, the state of the sun, the state of atmospheric-space weather, etc. The state of the atmosphere
L. F. Chernogor, K. P. Garmash, Q. Guo, Y. H. Zhdanko, V. F. Pushin, A. M. Tsymbal, Yu. Zheng   +6 more
doaj   +1 more source

Increased inspiratory resistance affects the dynamic relationship between blood pressure changes and subarachnoid space width oscillations. [PDF]

PLoS ONE, 2017
Respiration is known to affect cerebrospinal fluid (CSF) movement. We hypothesised that increased inspiratory resistance would affect the dynamic relationship between blood pressure (BP) changes and subarachnoid space width (SAS) oscillations.Experiments
Magdalena Wszedybyl-Winklewska, Jacek Wolf, Ewa Swierblewska, Katarzyna Kunicka, Kamila Mazur, Marcin Gruszecki, Pawel J Winklewski, Andrzej F Frydrychowski, Leszek Bieniaszewski, Krzysztof Narkiewicz   +9 more
doaj   +1 more source

Multiscale Characteristics of Two Supercell Tornados of Heilongjiang in 2021

应用气象学报, 2022
Two strong supercell tornados hit Shangzhi Acheng of Harbin and Meilisi of Qiqihar, Heilongjiang Province on 1 June ("6·1" Tornado) and 9 June ("6·9" Tornado) in 2021. Using the conventional meteorological observations and Doppler weather radar data, the
Xu Yue, Shao Meirong, Tang Kai, Zhang Libao, Du Jing, Wang Yongchao   +5 more
doaj   +1 more source

Single camera three component planar velocity measurements, using two frequency Planar Doppler Velocimetry (2v-PDV) (2005) [PDF]

, 2005
The work presented here describes a method that allows three component velocity measurements to be made, quickly and non-intrusively, across a plane in a flow defined by a laser light sheet. The method, two frequency planar Doppler Velocimetry (2v-PDV)
Charrett, Thomas O. H., Helen D. Ford, Ralph P. Tatam, Tatam, Ralph P., Tom O. H. Charrett, Ford, Helen D.   +5 more
core   +1 more source

Co-seismic infrasound in the ionosphere over Central Europe from the M_8.8 Kamchatka 2025 earthquake observed by Doppler sounding at record heights [PDF]

Atmospheric Chemistry and Physics
Unique observations of co-seismic infrasound waves and disturbances in the ionosphere recorded by continuous Doppler sounding systems (CDSS) in Czechia and Slovakia during geomagnetically quiet period and associated with the Kamchatka M8.8 earthquake on ...
J. Chum, Z. Mošna, J. Baše, J. Zedník, C. Schmidt, P. Hannawald, J. Rusz, J. Urbář, Š. Mackovjak   +8 more
doaj   +1 more source

An overview of methodologies for real-time detection, characterisation and tracking of traveling ionospheric disturbances developed in the TechTIDE project

Journal of Space Weather and Space Climate, 2020
The main objective of the TechTIDE project (warning and mitigation technologies for travelling ionospheric disturbances effects) is the development of an identification and tracking system for travelling ionospheric disturbances (TIDs) which will issue ...
Belehaki Anna, Tsagouri Ioanna, Altadill David, Blanch Estefania, Borries Claudia, Buresova Dalia, Chum Jaroslav, Galkin Ivan, Juan José Miguel, Segarra Antoni, Timoté Cristhian Camilo, Tziotziou Kostas, Verhulst Tobias G. W., Watermann Jurgen   +13 more
doaj   +1 more source

Sympathetic Activation Does Not Affect the Cardiac and Respiratory Contribution to the Relationship between Blood Pressure and Pial Artery Pulsation Oscillations in Healthy Subjects. [PDF]

PLoS ONE, 2015
Using a novel method called near-infrared transillumination backscattering sounding (NIR-T/BSS) that allows for the non-invasive measurement of pial artery pulsation (cc-TQ) and subarachnoid width (sas-TQ) in humans, we assessed the influence of ...
Pawel J Winklewski, Yurii Tkachenko, Kamila Mazur, Jacek Kot, Marcin Gruszecki, Wojciech Guminski, Krzysztof Czuszynski, Jerzy Wtorek, Andrzej F Frydrychowski   +8 more
doaj   +1 more source