Results 61 to 70 of about 452,012 (153)

HF Doppler Radar Observations of Geomagnetic Pulsations

, 2014
Geomagnetic pulsations interact with the ionosphere, which influences the propagation properties of high frequency (HF) radio waves. In this work we present results of an experimental study focused on investigation of relations between the geomagnetic
Fišer, Jiří
core  

Recent Advances in Stimulated Brillouin Scattering in Integrated Photonics

Advanced Physics Research, Volume 5, Issue 7, July 2026.
This review systematically surveys recent advances in stimulated Brillouin scattering (SBS) within integrated photonics. It begins by elucidating the fundamental mechanisms of stimulated coupling between photons and acoustic phonons in nanoscale waveguides, enhanced by the photoelastic and moving boundary effects.
Songyue Liu, Qi Lu, Pan Hu, Yuan Zhong, Yu He, Yaojing Zhang, Young‐Ik Sohn, Yikai Su, Lu Sun   +8 more
wiley   +1 more source

Osteoarthritis: Epidemiology, Diagnosis, and Treatment

MedComm, Volume 7, Issue 7, July 2026.
Osteoarthritis (OA) is a multifactorial degenerative joint disease and a leading cause of disability worldwide. This graphical abstract summarizes the epidemiology, diagnostic strategies, and therapeutic approaches of OA. OA development is driven by aging, metabolic dysregulation, and mechanical stress, leading to progressive joint degeneration ...
Qin Ru, Dongliang Yuan, Shide Jiang, Xiaoxuan Zhao, Xu Liu, Yusheng Li, Shuguang Liu, Yuxiang Wu   +7 more
wiley   +1 more source

The resolving power of radio sounding methods for ionospheric parameter reconstruction

, 2001
The r.m.s. errors in ionospheric parameters studied by the vertical HF-sounding method were determined for a monotonic height distribution of the electron density.
P.F. Denisenko (16044290), D.A. Noranovich (16044293), M.P. Gough (16044296), Natalia Beloff (4461595)   +3 more
core   +3 more sources

New sounding modes for SuperDARN HF radars [PDF]

, 2001
P(論文)We have developed several new sounding modes for SuperDARN HF radars to increase operation flexibility ("Nasu" mode, etc.) as well as to obtain both higher time resolution special camping beams data and global convection patterns simultaneously ...
Yamagishi, Hisao, Yukimatu, Akira Sessai, Sato, Natsuo   +2 more
core   +1 more source

Errors of ionospheric parameter diagnostics by vertical sounding method

, 2001
The problem of RMS error determination in ionospheric parameters measured by the method of vertical HF sounding is considered here. This problem is solved for the case of topside ionospheric sounding when the height distribution of electron density is ...
P F Denisenko (16041920), M P Gough (16041923), D. A. Noranovich, M. P. Gough, P. F. Denisenko, D A Noranovich (16078619), Natalia Beloff (4461595), N. Beloff   +7 more
core   +1 more source

Complexity and Nonlinear Dependence of Ionospheric Electron Content and Doppler Frequency Shifts in Propagating HF Radio Signals within Equatorial Regions

Atmosphere
The abundance of ions within the ionosphere makes it an important region for both long range and satellite communication systems. However, characterizing the complexity in the ionosphere within the equatorial region of Abuja, with geographic coordinates ...
Aderonke Akerele, Babatunde Rabiu, Samuel Ogunjo, Daniel Okoh, Anton Kascheyev, Bruno Nava, Olawale Bolaji, Ibiyinka Fuwape, Elijah Oyeyemi, Busola Olugbon, Jacob Akinpelu, Olumide Ajani   +11 more
doaj   +1 more source

Exploring the Interior of Europa with the Europa Clipper. [PDF]

Space Sci Rev, 2023
Roberts JH, McKinnon WB, Elder CM, Tobie G, Biersteker JB, Young D, Park RS, Steinbrügge G, Nimmo F, Howell SM, Castillo-Rogez JC, Cable ML, Abrahams JN, Bland MT, Chivers C, Cochrane CJ, Dombard AJ, Ernst C, Genova A, Gerekos C, Glein C, Harris CD, Hay HCFC, Hayne PO, Hedman M, Hussmann H, Jia X, Khurana K, Kiefer WS, Kirk R, Kivelson M, Lawrence J, Leonard EJ, Lunine JI, Mazarico E, McCord TB, McEwen A, Paty C, Quick LC, Raymond CA, Retherford KD, Roth L, Rymer A, Saur J, Scanlan K, Schroeder DM, Senske DA, Shao W, Soderlund K, Spiers E, Styczinski MJ, Tortora P, Vance SD, Villarreal MN, Weiss BP, Westlake JH, Withers P, Wolfenbarger N, Buratti B, Korth H, Pappalardo RT, Interior Thematic Working Group.   +61 more
europepmc   +1 more source

Overview of Promising Solutions in Subsurface Sounding Equipment. [PDF]

Sensors (Basel), 2023
Bryakin IV, Bochkarev IV, Khramshin VR, Gasiyarov VR.   +3 more
europepmc   +1 more source

Driving Influences of the Doppler Flash Observed by SuperDARN HF Radars in Response to Solar Flares. [PDF]

J Geophys Res Space Phys, 2022
Chakraborty S, Qian L, Baker JBH, Ruohoniemi JM, Kuyeng K, Mclnerney JM.   +5 more
europepmc   +1 more source