Results 61 to 70 of about 2,433,812 (201)

Pole‐To‐Pole 3D Radial Trajectory Designs Improve Image Quality and Quantitative Parametric Mapping in the Brain and Heart

Magnetic Resonance in Medicine, Volume 95, Issue 5, Page 2627-2643, May 2026.
ABSTRACT Purpose To design 3D radial spiral phyllotaxis trajectories aimed at removing phase inconsistencies, improving image quality, and enhancing parametric mapping accuracy by acquiring nearly opposing spokes starting from both hemispheres in 3D radial k‐space. Methods Two 3D radial trajectories, pole‐to‐pole and continuous spiral phyllotaxis, were
Eva S. Peper, Grzegorz Bauman, Matteo Tagliabue, Berk C. Açikgöz, Nils M. J. Plähn, Adèle L. C. Mackowiak, Yasaman Safarkhanlo, Joseph G. Woods, Davide Piccini, Li Feng, Christopher W. Roy, Oliver Bieri, Jessica A. M. Bastiaansen   +12 more
wiley   +1 more source

Modeling Fluid’s Dynamics with Master Equations in Ultrametric Spaces Representing the Treelike Structure of Capillary Networks

Entropy, 2016
We present a new conceptual approach for modeling of fluid flows in random porous media based on explicit exploration of the treelike geometry of complex capillary networks.
Andrei Khrennikov, Klaudia Oleschko, María de Jesús Correa López   +2 more
doaj   +1 more source

Risk Times in Mission‐Oriented Systems

Quality and Reliability Engineering International, Volume 42, Issue 3, Page 1380-1398, April 2026.
ABSTRACT This article assesses risk times in mission‐oriented systems with high safety standards. We examine critical times under two safety policies. The first requires that the system's reliability function, known the first failure of the components, must exceed a reliability level throughout the mission.
Antonio Arriaza, Jorge Navarro, Patricia Ortega‐Jiménez   +2 more
wiley   +1 more source

Scaling of Latitude‐Dependent Heat Transport in Geostrophic Convection

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Latitudinal variations in heat transport shape the thermal and magnetic evolution of rapidly rotating planets, stars, and icy moons. Although global simulations have revealed strong equatorial–polar contrasts, a predictive scaling theory has been lacking.
Veeraraghavan Kannan, Varghese Mathai, Xiaojue Zhu   +2 more
wiley   +1 more source

Patterning the Void: Combining L‐Systems with Archimedean Tessellations as a Perspective for Tissue Engineering Scaffolds

Advanced Functional Materials, Volume 36, Issue 23, 19 March 2026.
This study introduces a novel multi‐scale scaffold design using L‐fractals arranged in Archimedean tessellations for tissue regeneration. Despite similar porosity, tiles display vastly different tensile responses (1–100 MPa) and deformation modes. In vitro experiments with hMSCs show geometry‐dependent growth and activity. Over 55 000 tile combinations
Maria Kalogeropoulou, Kenny A. van Kampen, Pierpaolo Fucile, Carlos Mota, Lorenzo Moroni   +4 more
wiley   +1 more source

Performance Analysis of RIS-Assisted Communication With Direct Link: A New Copula Application

IEEE Open Journal of the Communications Society
Reconfigurable intelligent surface (RIS) has received remarkable attention as a promising solution to enhance the capacity and coverage of wireless cellular networks. In this paper, we evaluate the performance of RIS-assisted communication systems in the
Damoon Shahbaztabar, Imene Trigui, Wei-Ping Zhu, Wessam Ajib   +3 more
doaj   +1 more source

Unexpected {Pu60} Cage Cluster Units in New Plutonium(VI) Oxido‐Hydroxides

Angewandte Chemie Novit, Volume 2, Issue 1, March 2026.
Plutonium(VI) hydrolysis in strongly alkaline NaCl‐NaOH solutions yields needle‐ and platelet‐like crystals. They are built from unprecedented spherical [(PuO2)60O20(OH)120]40− cages that adopt a truncated dodecahedral (Archimedean) topology. Each {Pu60} cage contains 20 identical trimeric subunits, which self‐assemble from Pu(VI) solution trimers ...
David Fellhauer, Olaf Walter, Jörg Rothe, Kathy Dardenne, Dieter Schild, Roland Meier, Philipp Müller, Yongheum Jo, Xavier Gaona, Marcus Altmaier, Horst Geckeis   +10 more
wiley   +1 more source

Bivariate Flood Frequency Analysis Using the Copula Functions [PDF]

علوم و مهندسی آبیاری, 2015
In the conventional methods of flood frequency analysis, the flood peak variable is just considered and assumed that this variable follows some specific parametric distribution function.
meysam salari, Ali Mohammad Akhond Ali, Arash Adib, Ali Reza Dneshkhah   +3 more
doaj  

Subuniformity of harmonic mean p$$ p $$‐values

Canadian Journal of Statistics, Volume 54, Issue 1, March 2026.
Abstract We obtain several inequalities on the generalized means of dependent p$$ p $$‐values. In particular, the weighted harmonic mean of p$$ p $$‐values is strictly subuniform under several dependence assumptions of p$$ p $$‐values, including independence, negative upper orthant dependence, the class of extremal mixture copulas, and some Clayton ...
Yuyu Chen, Ruodu Wang, Yuming Wang, Wenhao Zhu   +3 more
wiley   +1 more source

Asymptotic independence in more than two dimensions and its implications on risk management

Canadian Journal of Statistics, Volume 54, Issue 1, March 2026.
Abstract In extreme value theory, the presence of asymptotic independence signifies that joint extreme events across multiple variables are unlikely. Although well understood in a bivariate context, the concept remains relatively unexplored when addressing the nuances of simultaneous occurrence of extremes in higher dimensions.
Bikramjit Das, Vicky Fasen‐Hartmann
wiley   +1 more source