Results 31 to 40 of about 144 (139)

Quaternion CR-submanifolds of a quaternion Kaehler manifold

International Journal of Mathematics and Mathematical Sciences, 2001
We study the quaternion CR-submanifolds of a quaternion Kaehler manifold. More specifically we study the properties of the canonical structures and the geometry of the canonical foliations by using the Bott connection and the index of a quaternion CR ...
Bassil J. Papantoniou, M. Hasan Shahid
doaj   +1 more source

Compact Totally Real Minimal Submanifolds in a Bochner-Kaehler Manifold

Universal Journal of Mathematics and Applications, 2018
In this paper, we establish the following results: Let $M$ be an $% m-$dimensional compact totally real minimal submanifold immersed in a locally symmetric Bochner-Kaehler manifold $\tilde{M}$ with Ricci curvature bounded from below. Then either $M$ is a
Mehmet Bektaş, Zühal Küçükarslan Yüzbaşı, Münevver Yıldırım Yılmaz   +2 more
doaj   +1 more source

Historical and Future Global Irrigation Energy Consumption by Fuel and Region

Earth's Future, Volume 14, Issue 5, May 2026.
Abstract Irrigation energy use is a significant component of agricultural production costs, contributing directly to the energy and emissions intensity of crop production and ultimately to food prices. Understanding the existing structure of irrigation energy consumption help achieve food‐energy‐water security and environmental goals.
Ying Zhang, Steven J. Smith, Kelly Casper   +2 more
wiley   +1 more source

Signature of quaternionic Kaehler manifolds

Proceedings of the Japan Academy, Series A, Mathematical Sciences, 1983
Quaternionic Kähler manifolds have analogues of the Hard-Lefschetz theorem and the Hodge index theorem. The latter on the signature is simpler and clear cut. Let M be a compact connected quaternionic Kähler manifold of positive scalar curvature with dimension 4n. Theorem 1. \[ H^{2p}(M)=\sum_{2k\leq p}(L_{\Omega})^ k P^{2p-4k}(M),\quad p\leq n, \] and \
Nagano, Tadashi, Takeuchi, Masaru
openaire   +2 more sources

Timing Is Everything: The Effect of Exposure to Pollution on Wildlife Gut Microbiota Is Contingent on Season

Molecular Ecology, Volume 35, Issue 8, April 2026.
ABSTRACT Exposure to environmental pollutants can disrupt the gut microbiota, but how pollutants impact natural, seasonal changes in wildlife gut microbiota remains unknown. We quantified how exposure to radionuclides affected temporal changes in the gut microbiota of bank voles (Clethrionomys glareolus) inhabiting the Chornobyl Exclusion Zone (CEZ ...
Andrii Vasylenko, Eugene Tukalenko, Anton Lavrinienko, Timothy A. Mousseau, Tapio Mappes, Phillip C. Watts   +5 more
wiley   +1 more source

On totally umbilical CR-submanifolds of a Kaehler manifold

International Journal of Mathematics and Mathematical Sciences, 1993
Let M be a compact 3-dimensional totally umbilical CR-submanifold of a Kaehler manifold of positive holomorphic sectional curvature. We prove that if the length of the mean curvature vector of M does not vanish, then M is either diffeomorphic to S3 or ...
M. A. Bashir
doaj   +1 more source

Climatology of Medium‐Scale Traveling Ionospheric Disturbances Over Continental US Using GNSS TEC From 2012 to 2023

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Medium‐Scale Traveling Ionospheric Disturbances (MSTIDs) have long been a subject of interest in ionospheric research. However, their spatiotemporal variability across regions, local times, seasons, and solar cycles is very complicated and remains not well established.
Jing Liu, Shun‐Rong Zhang, Anthea J. Coster, Philip J. Erickson, Hanli Liu   +4 more
wiley   +1 more source

Functional generalism in plant–hummingbird interactions: Causes and consequences from a plant perspective

Functional Ecology, Volume 39, Issue 11, Page 3339-3350, November 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant species pollinated by animals differ in the pool of visitors they attract. Some attract functionally similar animals, while others engage with a broader set of functionally distinct visitors; we term this species‐level variation functional generalism.
Ricardo Sánchez‐Martín, Elisa Barreto, François Duchenne, Isabela Galarda Varassin, María Maglianesi, Boris Tinoco, Catherine H. Graham   +6 more
wiley   +1 more source

Hummingbird flower visitation rates vary with species traits, floral abundance and phenology across bioregions

Oikos, Volume 2025, Issue 9, September 2025.
A myriad of factors influence species interactions, and determining their relative importance is a major challenge in community ecology. Here, we explored the multiple factors influencing hummingbird visitation rates to flowers by considering pollinator and floral traits alongside the broader ecological context (i.e.
Elisa Barreto, François Duchenne, Holger Beck, Carolina Bello, Rafaela Bobato, Emanuel Brenes, Daniela Bôlla, Nicole Büttner, Ana Paula Caron, José Alejandro Castro, Nelson Chaves‐Elizondo, María José Gavilanes, Esteban A. Guevara, Miriam Kaehler, Tiago Machado‐de‐Souza, Miguel Machnicki-Reis, Andrés S. Marcayata‐Fajardo, Cauã G. de Menezes, Andrea Nieto, Rafael de Oliveira, Ricardo A. C. de Oliveira, Alejandro Restrepo-González, Friederike Richter, Bryan G. Rojas, Luciele L. Romanowski, Ricardo Sánchez-Martín, Romulo C. da Silva, Wellinton Luiz de Souza, Danila S. Veluza, Ben Weinstein, Rafael Wüest, Thais B. Zanata, Krystal Zuniga, Tatiana Santander, Maria A. Maglianesi, Isabela G. Varassin, Catherine H. Graham   +36 more
wiley   +1 more source

Research Review: Mechanisms of change and between‐family differences in parenting interventions for children with ADHD – an individual participant data meta‐analysis

Journal of Child Psychology and Psychiatry, Volume 66, Issue 9, Page 1304-1319, September 2025.
Background Understanding the mechanisms of change and between‐family differences in behavioural parenting interventions for children with attention‐deficit/hyperactivity disorder (ADHD) may help personalise interventions. Therefore, we examined whether improvements in parenting are associated with changes in child behaviour and functional outcomes, and
Constantina Psyllou, Marjolein Luman, Barbara J. van den Hoofdakker, Saskia Van der Oord, Asma Aghebati, Bianca Boyer, Jan Buitelaar, Andrea Chronis‐Tuscano, David Daley, Tycho J. Dekkers, George J. DuPaul, Gregory A. Fabiano, Maite Ferrin, Nike Franke, Naama Gershy Tsahor, Elizabeth Harvey, Timo Hennig, Sharonne Herbert, Pieter J. Hoekstra, Lee Kern, Jennifer A. Mautone, Amori Yee Mikami, Sébastien Normand, Linda J. Pfiffner, Shizuka Shimabukuro, Satyam Antonio Schramm, Julie B. Schweitzer, Margaret H. Sibley, Edmund Sonuga‐Barke, Catherine Thompson, Margaret J. Thompson, Gail Tripp, Carolyn Webster‐Stratton, Yuhuan Xie, Patty Leijten, Annabeth P. Groenman   +35 more
wiley   +1 more source