Results 31 to 40 of about 452,012 (153)

A comprehensive sounding of the ionospheric HF radio link from Antarctica to Spain [PDF]

, 2013
Since 2003, our group has been investigating the performance of different transmission techniques for low-power low-interference High Frequency (HF) ionospheric communication systems. Specifically, we have focused on the link between the Spanish Antarctic
Bardají Benach, Raúl, Ads, Ahmed Gamal, Vilella Parra, Carles, Mauricio Ferré, Juan, Regué, Joan Ramon, Bergadà Caramés, Pau, Pijoan Vidal, Joan Lluís   +6 more
core   +2 more sources

Software and hardware system of multi-frequency oblique sounding the ionosphere

Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2020
Background. The ionosphere was and will be the main channel for the propagation of radio waves of various bands (from extremely low to super-high frequencies).
L. F. Chernogor, K. P. Garmash, Y. H. Zhdanko, S. G. Leus, V. A. Podnos   +4 more
doaj   +1 more source

MONITORING OF REGULAR AND SPORADIC IONOSPHERIC VARIATIONS ON THE SINGLE-HOP HF RADIO PATHS [PDF]

Radio Physics and Radio Astronomy, 2018
Purpose: Diagnostics of regular and sporadic ionospheric variations using coherent systematic monitoring of spectral characteristics of the probe HF signals on the inclined singlehop radio paths.
A. I. Reznychenko, A. V. Koloskov, Y. M. Yampolski   +2 more
doaj   +1 more source

Propagation characteristics of sporadic E and medium-scale traveling ionospheric disturbances (MSTIDs): statistics using HF Doppler and GPS-TEC data in Japan

Earth, Planets and Space, 2022
We carried out a statistical analysis of the propagation characteristics of Es and Medium-Scale Traveling Ionospheric Disturbances (MSTIDs) by combining data of HF Doppler (HFD) sounder and Total Electron Content (TEC) obtained from the GPS receivers of ...
Ryo Matsushima, Keisuke Hosokawa, Jun Sakai, Yuichi Otsuka, Mitsumu K. Ejiri, Michi Nishioka, Takuya Tsugawa   +6 more
doaj   +1 more source

Observations of traveling ionospheric disturbances driven by gravity waves from sources in the upper and lower atmosphere [PDF]

Annales Geophysicae
The observed traveling ionospheric disturbances (TIDs) are attributed to atmospheric gravity waves generated by auroral sources in the lower thermosphere or gravity waves generated in the troposphere by midlatitude weather systems.
P. Prikryl, D. R. Themens, D. R. Themens, J. Chum, S. Chakraborty, R. G. Gillies, J. M. Weygand   +6 more
doaj   +1 more source

On the relationship between the velocity of E-region HF echoes and E B plasma drift [PDF]

, 2005
International audienceIn this study, velocities of E-region HF echoes observed by the Stokkseyri HF radar are compared with ExB plasma drifts in the F-region measured by the DMSP satellites.
D. W. Danskin, Koustov, A. V., J. D. Gorin, Makarevitch, R. A., Gorin, J. D., A. V. Koustov, R. A. Makarevitch, Danskin, D. W.   +7 more
core   +2 more sources

Technology Assisted Intraoperative Anatomic Visualization: Surgeon Perspectives and Unmet Needs

World Journal of Surgery, EarlyView.
Iatrogenic injury to critical anatomic structures remains a leading source of surgical morbidity, most commonly due to visual misperception rather than technical error. Despite a rapidly expanding ecosystem of intraoperative visualization adjuncts, the surgeon's perspective on current limitations and unmet needs has not been evaluated. The objective of
Yann Sakref, Madeline Elizabeth Adams, Peiqi Chen, Zaria Cosby, Kristen Davis‐Lopez, Arden M. Morris, Zhongming Li, F. Christopher Holsinger, Jeffrey K. Jopling, Lisa M. Knowlton   +9 more
wiley   +1 more source

Physical Layer Definition for a Long-Haul HF Antarctica to Spain Radio Link

Remote Sensing, 2016
La Salle and the Observatori de l’Ebre (OE) have been involved in a remote sensing project in Antarctica for the last 11 years. The OE has been monitoring the geomagnetic activity for more than twenty years and also the ionospheric activity of the last ...
Rosa Ma Alsina-Pagès, Marcos Hervás, Ferran Orga, Joan Lluís Pijoan, David Badia, David Altadill   +5 more
doaj   +1 more source

Renal‐vascular axis: unmasking its role in vascular endothelial growth factor‐inhibitor vascular toxicity in cancer patients

British Journal of Pharmacology, EarlyView.
Abstract Vascular toxicity is a growing concern in cancer patients receiving vascular endothelial growth factor inhibitor (VEGFi) therapy, posing a significant threat to patient prognosis. While the primary mechanism of VEGFi‐induced vascular toxicity is linked to redox‐sensitive reactions that disrupt vascular tone, leading to hypertension and ...
Grace Whelan, Karla B. Neves
wiley   +1 more source

Revitalization Treatment in Endodontics: A State‐Of‐The‐Art Review

International Endodontic Journal, EarlyView.
ABSTRACT Ten years after the European Society of Endodontology (ESE) issued its inaugural Position Statement in 2016, revitalization (BrE: revitalisation) treatment has progressed from an experimental approach to a cornerstone of contemporary endodontic practice.
M. Widbiller, X. Petridis, G. Krastl, N. Meschi, J. Camilleri, H. F. Duncan, M. T. Arias‐Moliz, J. G. Leprince, G. Van Gorp, M. Arnold, K. M. Galler, S. Simon, B. Kahler   +12 more
wiley   +1 more source