Results 131 to 140 of about 99,371 (246)

Trans-Sasakian 3-Manifolds with Reeb Flow Invariant Ricci Operator

open access: yesMathematics, 2018
Let M be a three-dimensional trans-Sasakian manifold of type ( α , β ) . In this paper, we obtain that the Ricci operator of M is invariant along Reeb flow if and only if M is an α -Sasakian manifold, cosymplectic manifold or a
Yan Zhao, Wenjie Wang, Ximin Liu
doaj   +1 more source

Ricci Solitons in β-Kenmotsu Manifolds

open access: yesAnnals of the West University of Timisoara: Mathematics and Computer Science, 2018
The object of the present paper is to study Ricci soliton in β-Kenmotsu manifolds. Here it is proved that a symmetric parallel second order covariant tensor in a β-Kenmotsu manifold is a constant multiple of the metric tensor.
Kumar Rajesh
doaj   +1 more source

Chromosome‐Level Genome Assembly of the Loach Goby Rhyacichthys aspro Offers Insights Into Gobioidei Evolution

open access: yesMolecular Ecology Resources, Volume 25, Issue 7, October 2025.
ABSTRACT The percomorph fish clade Gobioidei is a suborder that comprises over 2200 species distributed in nearly all aquatic habitats. To understand the genetics underlying their species diversification, we sequenced and annotated the genome of the loach goby, Rhyacichthys aspro, an early‐diverging group, and compared it with nine additional Gobioidei
Tzi‐Yuan Wang   +10 more
wiley   +1 more source

Biodiversity in mountain soils above the treeline

open access: yesBiological Reviews, Volume 100, Issue 5, Page 1877-1949, October 2025.
ABSTRACT Biological diversity in mountain ecosystems has been increasingly studied over the last decade. This is also the case for mountain soils, but no study to date has provided an overall synthesis of the current state of knowledge. Here we fill this gap with a first global analysis of published research on cryptogams, microorganisms, and fauna in ...
Nadine Praeg   +36 more
wiley   +1 more source

AI‐Driven Defect Engineering for Advanced Thermoelectric Materials

open access: yesAdvanced Materials, Volume 37, Issue 35, September 4, 2025.
This review presents how AI accelerates the design of defect‐tuned thermoelectric materials. By integrating machine learning with high‐throughput data and physics‐informed representations, it enables efficient prediction of thermoelectric performance from complex defect landscapes.
Chu‐Liang Fu   +9 more
wiley   +1 more source

Introduction of the G2-Ricci flow: Geometric implications for spontaneous symmetry breaking and gauge boson masses

open access: yesNuclear Physics B
This work introduces the G2-Ricci flow on seven-dimensional manifolds with non-zero torsion and explores its physical implications. By extending the Ricci flow to manifolds with G2 structures, we study the evolution of solitonic solutions and their role ...
Richard Pinčák   +3 more
doaj   +1 more source

Heterogeneity of Green Investments, Firms' Sales, and Wages: Italian Evidence on Circular Economy, Resource‐Saving, and Energy Efficiency Investments

open access: yesBusiness Strategy and the Environment, Volume 34, Issue 6, Page 6991-7015, September 2025.
ABSTRACT This paper analyses the relationship between firms' investment in green technologies and competitive performance. We take advantage of new data on the adoption of different green technologies (circular economy, technical advancements, energy savings, and efficiency gains) from a large representative sample of Italian firms.
F. Quatraro, A. Ricci
wiley   +1 more source

Anti‐Lung Cancer Effects and Related Mechanisms of α‐Caryophyllene In Vitro and In Vivo

open access: yesFood Science &Nutrition, Volume 13, Issue 9, September 2025.
α‐Caryophyllene is a natural condiment and flavoring additive. In this study, α‐caryophyllene suppressed the proliferation of A549 cells, induced apoptosis via the mitochondrial pathway, and restricted cell metastasis in vitro. Besides, it repressed the growth of A549 transplantation tumors by causing apoptosis of tumor cells in vivo.
Lu Jin   +9 more
wiley   +1 more source

Moderate Laryngeal Dysplasia in the Context of Classification Systems and Clinical Decision Making

open access: yesThe Laryngoscope, Volume 135, Issue 9, Page 3296-3305, September 2025.
There is still an ongoing debate about the classification of laryngeal dysplasia. In a large retrospective analysis of 392 patients, the progression of dysplasia and the risk of a de novo occurrence of invasive carcinoma were evaluated. Here especially the high rate of occurrence of invasive carcinoma in the group of moderate dysplasia with 44% is of ...
Flurin Mueller‐Diesing   +11 more
wiley   +1 more source

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