Results 51 to 60 of about 926,286 (251)

Solar cycle dependence of polar cap patch activity [PDF]

Radio Science, 2002
Ionospheric foF2 data from two stations, Sondrestromfjord and Qaanaq, Greenland, for 4 years corresponding to four different levels of sunspot activity (sunspot number (SSN) = 150 ± 50, 125 ± 50, 40 ± 20, and 10 ± 10) are used to study the dependence of occurrence and intensity of polar cap patches on solar cycle activity.
openaire   +1 more source

Impact of the substorms and polar cap patches on GPS radio waves at polar latitudes.

Proceedings of the 43rdAnnual Seminar, 2020
The comparative research of the influence of substrorm precipitation and polar cap patches (PCP) on the GPS signals disturbances in the polar ionosphere was done. For this aim we use the GPS scintillation receivers at Ny-Ålesund, operated by the University of Oslo.
Vladimir Belakhovsky, Yaqi Jin, Wojciech Miloch   +2 more
openaire   +1 more source

Two‐dimensional direct imaging of structuring of polar cap patches [PDF]

Journal of Geophysical Research: Space Physics, 2013
A highly sensitive all‐sky electron multiplier charge‐coupled device airglow imager has been operative in Longyearbyen, Norway (78.1°N, 15.5°E), since October 2011. The imager obtains the 630.0 nm all‐sky images with an exposure time of 4 s, which is about 10 times shorter than the conventional cooled CCD airglow imagers.
K. Hosokawa, S. Taguchi, Y. Ogawa, J. Sakai   +3 more
openaire   +1 more source

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

The High Latitude Ionospheric Response to the Major May 2024 Geomagnetic Storm: A Synoptic View

Geophysical Research Letters
The high latitude ionospheric evolution of the May 10‐11, 2024, geomagnetic storm is investigated in terms of Total Electron Content and contextualized with Incoherent Scatter Radar and ionosonde observations.
David R. Themens, Sean Elvidge, Anthony McCaffrey, P. T. Jayachandran, Anthea Coster, Roger H. Varney, Ivan Galkin, Lindsay V. Goodwin, Chris Watson, Sophie Maguire, Andrew J. Kavanagh, Shun‐Rong Zhang, Larisa Goncharenko, Asti Bhatt, Gareth Dorrian, Keith Groves, Alan G. Wood, Ben Reid   +17 more
doaj   +1 more source

Achieving High ON State Current through Ferroelectric Polarization‐Dependent Interfacial Resistance Switching in Undoped Orthorhombic HfO2 Films

Advanced Functional Materials, EarlyView.
Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand, Nuno Estrócio, Ji S. Kim, Babak Bakhit, Marian C. Istrate, Corneliu Ghica, Tiago Rebelo, Nives Strkalj, Abin Varghese, Bernardo Almeida, Luís S. Marques, Bipin Rajendran, Judith L. MacManus‐Driscoll, José P. B. Silva   +13 more
wiley   +1 more source

Direct Observations of a Polar Cap Patch Formation Associated With Dayside Reconnection Driven Fast Flow [PDF]

, 2020
Dayside solar‐produced concentrated F region plasma can be transported from the midlatitude region into the polar cap during geomagnetically disturbed period, creating plasma density irregularities like polar cap patches, which can cause scintillation ...
Michael Ruohoniemi, Jiaen Ren, Ren, Jiaen, Ruohoniemi, Michael, Elizabeth Kendall, Shasha Zou, Kevin Sterne, Coster, Anthea, Kendall, Elizabeth, Sterne, Kevin, Anthea Coster, Zou, Shasha   +11 more
core   +1 more source

Tracking of polar cap ionospheric patches using data assimilation [PDF]

Journal of Geophysical Research: Space Physics, 2007
Ionospheric F‐region patches are 2–10 larger than background electron densities in the polar ionosphere. The EISCAT Svalbard incoherent radar (ESR) observed a sequence of patches between 2000–2200 UT on 12 December 2001. In this paper the source of these structures is investigated using several other data sets, together with a convection‐driven ...
G. S. Bust, G. Crowley
openaire   +1 more source

Biodegradable and Biocompatible Functional Polymers for Biomedical Applications

Advanced Functional Materials, EarlyView.
Biodegradable and biocompatible functional polymers integrate electrical, mechanical, and stimuli‐responsive functionalities while enabling programmed degradation under physiological conditions. This review introduces recent advances in conductive, shape‐memory, self‐healing, photocurable, and adhesive polymer systems, emphasizing material design ...
Won Bae Han, Shuvra Mondal, Sungkeun Han, Chan‐Hwi Eom, Venkata Ramesh Naganaboina, Suk‐Won Hwang   +5 more
wiley   +1 more source

A statistical survey of polar cap cold and hot patches in the Southern Hemisphere using a DMSP Satellite

Earth and Planetary Physics
This paper is a statistical survey of Southern Hemisphere cold and hot polar cap patches, in relation to the interplanetary magnetic field (IMF) and ionospheric convection geometry. A total of 11,946 patch events were identified by Defense Meteorological
Duan Zhang, QingHe Zhang, Kjellmar Oksavik, ZanYang Xing, L. R. Lyons, HuiGen Yang, Tong Xu, Marc Hairston, XiangYu Wang, YuZhang Ma, GuoJun Li, Yong Wang, Sheng Lu, Jin Wang   +13 more
doaj   +1 more source