Results 121 to 130 of about 5,383 (243)

Vertical and Spatial Geochemical Variations of Nishinoshima Volcaniclastic Deposits, Japan, During Episode 4

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Nishinoshima is a volcanic island in the Ogasawara Arc that has exhibited intermittent activity since 2013, including four major eruptive episodes: 2013–2015 (Episode 1), 2017 (Episode 2), 2018 (Episode 3), and 2019–2020 (Episode 4). Previous studies reported a change in eruption style—from a Strombolian eruption with lava flows (Episode 1 to the early
Erika Tanaka, Kenta Yoshida, Tomoki Sato, Yoshiro Nishio, Yoshihiko Tamura   +4 more
wiley   +1 more source

Signal Processing Methods to Improve Ocean Surface Wave Estimation from a High Frequency Surface Wave Radar [PDF]

, 2011
High frequency surface wave radars are operated as a remote sensor to measure ocean surface parameters to ranges exceeding 200-300 km from the coastline.
Wang, Wei
core  

Cluster spacecraft observations of a ULF wave enhanced by Space Plasma Exploration by Active Radar (SPEAR) [PDF]

, 2009
Space Plasma Exploration by Active Radar (SPEAR) is a high-latitude ionospheric heating facility capable of exciting ULF waves on local magnetic field lines. We examine an interval from 1 February 2006 when SPEAR was transmitting a 1 Hz modulation signal
T. R. Robinson (7590257), Tim K. Yeoman (7583066), Badman, S. V., Clausen, L. B. N., L. B. N. Clausen (7594130), R. C. Fear (7591262), S. V. Badman, Robinson, T. R., Wright, D. M., S. V. Badman (7590704), T. K. Yeoman, D. M. Wright (7583069), Fear, R. C., T. R. Robinson, D. M. Wright, Yeoman, T. K., R. C. Fear, L. B. N. Clausen   +17 more
core   +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  

First simultaneous observations of flux transfer events at the high-latitude magnetopause by the cluster spacecraft and pulsed radar signatures in the conjugate ionosphere by the CUTLASS and EISCAT radars [PDF]

, 2001
Cluster magnetic field data are studied during an outbound pass through the post-noon high-latitude magnetopause region on 14 February 2001. The onset of several minute perturbations in the magnetospheric field was observed in conjunction with a ...
A. Balogh (7591361), S. W. H. Cowley, H. Khan, Balogh, A., Georgescu, E., J. A. Davies (4412452), T. K. Yeoman (7601525), J. A. Wild (7591442), T. K. Yeoman, M. W. Dunlop, Stanley William Herbert Cowley (7627505), G. Provan, Dunlop, M. W., Yeoman, T. K., S. E. Milan (7594526), E. Georgescu, J. A. Davies, Fornacon, K.-H., G. Provan (7602020), M. W. Dunlop (7591493), H. Khan (723527), Milan, S. E., Provan, G., Lester, M., K.-H. Fornaçon, K. H. Fornacon (7612235), Wild, J. A., Khan, H., J. A. Wild, M. Lester, A. Balogh, M. Lester (7589660), Davies, J. A., S. E. Milan, Cowley, S. W. H., E. Georgescu (7612238)   +35 more
core   +1 more source

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  

Low training volume adaptive processing in HF skywave radar

, 2008
Adaptive processing in the HF radar environment suffers from the paucity of appropriate training data relative to the dimension of the required spatial filters.
Abramovich, Y., Yuri I. Abramovich, Johnson, B., Ben A. Johnson   +3 more
core   +1 more source

Application of a D‐Optimal Mixture Design for the Development and Optimization of a Pasta Enriched With Pumpkin Products

Journal of Food Science, Volume 91, Issue 6, June 2026.
ABSTRACT Fortification of wheat‐based products with high‐nutritional‐value ingredients is becoming of great interest as a strategy for producing high‐quality sustainable food products. Therefore, pumpkin products such as pulp (PPU), peel (PPE), and seed (PS) were blended into wheat pasta at different proportions and combinations using D‐optimal mixture
Amira Oufighou, Fatiha Brahmi, Sabiha Achat, Leila Smail‐Benazzouz, Younes Arroul, Sarah Slimani, Sidahmed Saadi, Lila Boulekbache‐Makhlouf, Francisco Artés‐Hernández, Noelia Castillejo   +9 more
wiley   +1 more source

DEDNet: Offshore Eddy Detection and Location with HF Radar by Deep Learning. [PDF]

Sensors (Basel), 2020
Liu F, Zhou H, Wen B.
europepmc   +1 more source

Modelling a Suitable Habitat for Nigeria–Cameroon Chimpanzees (Pan troglodytes ellioti, Matschie, 1914) in Mpem and Djim National Park, Central Cameroon

African Journal of Ecology, Volume 64, Issue 4, June 2026.
ABSTRACT Tropical forest mammalian communities, particularly those in ecological transition zones, are under constant threat from human activity. In many regions, there is a lack of baseline data on suitable habitats and the environmental factors influencing their suitability.
Ernest D. B. Fotsing, Meigang M. F. Kamkeng, Ogenrwot Ronald   +2 more
wiley   +1 more source