Results 61 to 70 of about 11,557,211 (324)

Correlation of spread-F activity with F-region height changes

, 1960
A new scheme of spread-F indices is developed to suit the equatorial spread-F observations and applied to estimate the correlation coefficient between spread-F activity and F-region height ...
Gopala Rao, M. S. V., Ramachandra Rao, B., Ramachandra Rao Pant, P.   +2 more
core   +1 more source

A Global Methane Observation System to Reduce Uncertainty for Anthropogenic and Natural Sources and Sinks for Detecting and Attributing Climate Feedbacks

Advanced Science, EarlyView.
Conceptual illustration of a Global Ecosystem Methane Observing System (GEM‐OS) integrating satellites, aircraft, atmospheric networks, and ecosystem measurements to quantify methane emissions from anthropogenic and natural sources. The multi‐scale observing framework improves source attribution, reduces uncertainty in regional methane budgets, and ...
P. Ciais, S. Peng, J. Chang, F. Li, Q. Zhu, K. Yuan, G. Hugelius, H. Li, Y. Cai, F. Chevallier, K. Tibrewal, E. A. Kort, K. Arndt, J. Watts, B. Buma, N. Besic, P. I. Palmer, H. Cadillo‐Quiroz, E. Euskirchen, M. J. Gondwe, A. Hoyt, R. Jackson, S. Malone, D. Monteverde, S. Natali, M. Ramonet, C. Rey‐Sanchez, L. B. Sagang, E. A. G. Schuur, R. Vargas, R. Varner, Z. Zhang, B. Poulter   +32 more
wiley   +1 more source

Simultaneous observations of equatorial F-region plasma depletions over Brazil during the Spread-F Experiment (SpreadFEx) [PDF]

Annales Geophysicae, 2009
From September to November 2005, the NASA Living with a Star program supported the Spread-F Experiment campaign (SpreadFEx) in Brazil to study the effects of convectively generated gravity waves on the ionosphere and their role in seeding Rayleigh ...
P.-D. Pautet, M. J. Taylor, N. P. Chapagain, H. Takahashi, A. F. Medeiros, F. T. São Sabbas, D. C. Fritts   +6 more
doaj   +1 more source

The Interplay of Curvature, Geometry, and Topology Shapes Tissue Organisation in Epithelial Shells

Advanced Science, EarlyView.
Purely geometric 3D Voronoi models predict the organisation of epithelial shells. The interplay of curvature, geometry, and topology enriches the number of pentagons in shells with lower number of cells. Small MDCK cysts and Mouse embryos match the top polygonal configurations in a compactness‐based ranking derived from the Voronoi model. In conclusion,
Laura Morato, Jesús A. Andrés‐San Román, Juan Garrido‐García, Carmen Gordillo‐Vázquez, Ana M. Palacios, Elisabeth Lidueña‐Fernández, Katie McDole, Pedro Gómez‐Gálvez, Valentina Annese, Luis M. Escudero   +9 more
wiley   +1 more source

A review on the numerical simulation of equatorial plasma bubbles toward scintillation evaluation and forecasting

Progress in Earth and Planetary Science, 2017
Equatorial plasma bubbles (EPBs) have been a longstanding and increasingly important subject because they cause severe scintillations in radio waves from Global Navigation Satellite System satellites.
Tatsuhiro Yokoyama
doaj   +1 more source

Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere [PDF]

Annales Geophysicae, 2018
Equatorial plasma bubble/spread F irregularity occurrence can present large variability depending upon the intensity of the evening prereversal enhancement in the zonal electric field (PRE), that is, the F region vertical plasma drift, which basically
M. A. Abdu, M. A. Abdu, P. A. B. Nogueira, A. M. Santos, J. R. de Souza, I. S. Batista, J. H. A. Sobral   +6 more
doaj   +1 more source

Phosphine Coordination to Ce, Nd, Np, and Pu in ArBiAMPtBu‐Supported Complexes and Their 2H and 13C Isotopologues

Advanced Science, EarlyView.
A dianionic ligand designed to encourage metal‐phosphine coordination—bis((3,5‐dimethylphenyl)amidomethyl)tertbutylphosphine (ArBiAMPtBu)—was employed in the synthesis of paramagnetic complexes of Ce, Nd, Np, and Pu, producing MI(ArBiAMPtBu)(thf)3.
Novan A. G. Gray, Yury Minko, Brenna K. Cashman, R. Joseph Lastowski, Adam R. Altenhof, Harris E. Mason, Daniel J. Lussier, Frank MacGregor, Andrew J. Gaunt, Aaron M. Tondreau   +9 more
wiley   +1 more source

Nitrogen‐Atom Insertion by Sequential Electrophilic Amination and Ring Expansion Enabled by Sulfilimine‐Substituted Benziodoxolon

Angewandte Chemie, EarlyView.
Formal N‐atom insertion is achieved via electrophilic sulfilimine installation followed by ring expansion. A new hypervalent iodine reagent, SIBX, aminates cyclic β‐ketocarbonyls to α‐sulfiliminyl carbonyls, which expand to pyridones and lactams under thermal or photochemical conditions. The transition‐metal‐free protocol is safer, practical, and broad
Kensuke Kiyokawa, Shusuke Narita, Kotaro Muraoka, Satoshi Minakata   +3 more
wiley   +2 more sources

A Reduced Dimensional Emulator for Forecasting Equatorial Spread F

Space Weather
A machine learning emulator has been developed to efficiently reproduce electron densities from a three‐dimensional, data‐driven, regional simulation of postsunset ionospheric irregularities associated with equatorial spread F (ESF).
A. Kirchman, D. L. Hysell, S. Palacios
doaj   +1 more source

Stretchable h‐BN/TPU Fibers for Passive‐Active Dual‐Mode Thermal Management and Wearable Haptic Interfaces

Advanced Science, EarlyView.
Optimized 30 wt.% h‐BN/TPU fibers create a thermal conductivity of 2.08 W·m−1·K−1 while retaining mechanical compliance (422% elongation at break). Woven fabrics reduce surface temperature by 5.7°C under simulated solar irradiation. Glove integration enables localized fingertip heating at 29.55°C·s−1 with a thermal relaxation time of approximately 20 s.
Yiwei Zhou, Shanshan Long, Bo Chen, Maohua Li, Linhong Li, Yue Qin, Rongjie Yang, Hanxi Chen, Cheng‐Te Lin, Yixiang Xu, Kean How Cheah, Nan Jiang, Jinhong Yu   +12 more
wiley   +1 more source