Results 191 to 200 of about 261,856 (238)

Could dark energy be changing over time? [PDF]

Proc Natl Acad Sci U S A
Mann A.
europepmc   +1 more source

Cross‐Site Generalization of CNN‐Based B1+$$ {B}_1^{+} $$ Mapping in UHF MRI

NMR in Biomedicine, Volume 39, Issue 5, May 2026.
The study demonstrates that CNN%‐based B1+$$ {B}_1^{+} $$ mapping transfers across sites with only moderate accuracy loss: while on‐site RMSEs were as low as ~3%, cross‐site predictions increased errors but remained qualitatively robust. Despite these deviations, cross‐site maps successfully enabled dynamic 4kT‐points pulses, achieving flip‐angle ...
Kimon Hadjikiriakos, Felix Krüger, Felix Frederik Zimmermann, Johannes A. Grimm, Constantin Schorling, Max Lutz, Simon Schmidt, Layla Tabea Riemann, Katja Degenhardt, Tobias Schäffter, Mark E. Ladd, Gregory J. Metzger, Christoph Stefan Aigner, Sebastian Schmitter   +13 more
wiley   +1 more source

Martian ionospheric response during the may 2024 solar superstorm. [PDF]

Nat Commun
Parrott J, Sánchez-Cano B, Svedhem H, Witasse O, Meggi D, Wilson C, Cardesín-Moinelo A, Müller-Wodarg I.   +7 more
europepmc   +1 more source

Springtime Formation of Laminated Soil Carbonate Rinds and Changes in Fluvial Terrace Soils on Orbital Timescales at Rio Mesa, Utah, USA

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Laminated soil carbonate rinds are a Quaternary paleoclimate archive whose isotope composition is linked to soil formation conditions. At Rio Mesa, Utah (USA), we investigated the fidelity of rind records in a river terrace setting by determining the seasonal timing of rind formation and testing for inter‐record replication.
Tyler E. Huth, Thure E. Cerling, David W. Marchetti, Amy L. Ellwein, Shannon Mahan, David R. Bowling, Benjamin H. Passey, Victor J. Polyak, Yemane Asmerom   +8 more
wiley   +1 more source

Phase diagram and spectroscopic signatures of a supersolid in the quantum ising magnet K₂Co(SeO₃)₂. [PDF]

Nat Commun
Chen T, Ghasemi A, Zhang J, Shi L, Tagay Z, Chen Y, Chen L, Choi ES, Jaime M, Lee M, Hao Y, Cao H, Winn BL, Podlesnyak AA, Pajerowski DM, Zhong R, Xu X, Armitage NP, Cava R, Broholm C.   +19 more
europepmc   +1 more source

Cryptic Paleomagnetic Complexity in the Ediacaran Egersund Dikes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract The Ediacaran Period (∼635–539 Ma) represents a critical interval in Earth's evolution, yet its paleomagnetic record remains complex and contentious. One of the few Ediacaran paleomagnetic results from Baltica considered robust is a pole from the ca.
Yi Xue, Mathew Domeier, Petter Silkoset, Leandro C. Gallo, Justin A. D. Tonti‐Filippini, Harald J. Walderhaug   +5 more
wiley   +1 more source

Subgiants in NGC 188 reveal that rotationally induced mixing creates the main sequence Li-Dip. [PDF]

Nat Commun
Sun Q, Deliyannis CP, Anthony-Twarog BJ, Twarog BA, Xu XT, Steinhauer A, King JR.   +6 more
europepmc   +1 more source

Key New Evidence for the Hainan Mantle Plume Head: Ongoing Formation of a Large Igneous Province?

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract The process‐based surface magmatic expression of mantle plumes is typically a large igneous province (LIP) induced by the mantle plume head, followed by subsequent age‐progressive volcanic tracks resulting from plate drifting above the plume tail.
F. Yang, X. L. Huang, L. Liu, Y. G. Xu, Y. Hua, P. L. He, L. Zhang, W. F. Zhang, Y. Yu, H. Y. Li   +9 more
wiley   +1 more source

Horizontal and vertical exoplanet thermal structure from a JWST spectroscopic eclipse map. [PDF]

Nat Astron
Challener RC, Weiner Mansfield M, Cubillos PE, Piette AAA, Coulombe LP, Beltz H, Blecic J, Rauscher E, Bean JL, Benneke B, Kempton EM, Harrington J, Komacek TD, Parmentier V, Casewell SL, Iro N, Mancini L, Nixon MC, Radica M, Steinrueck ME, Welbanks L, Batalha NM, Caceres C, Crossfield IJM, Crouzet N, Désert JM, Molaverdikhani K, Nikolov NK, Palle E, Rackham BV, Schlawin E, Sing DK, Stevenson KB, Tan X, Turner JD, Zhang X.   +35 more
europepmc   +1 more source

A Machine Learning Parameterization for the Internal Gravity Wave Spectrum

Journal of Geophysical Research: Oceans, Volume 131, Issue 5, May 2026.
Abstract We introduce a stochastic model designed to parametrize the spectral properties of internal waves, using two functions that represent the semidiurnal spectral tidal cusps and the energy continuum between the inertial and the buoyancy frequencies.
Yutao Zheng, Matthew D. Rayson, Nicole L. Jones, Lachlan C. Astfalck   +3 more
wiley   +1 more source