Results 11 to 20 of about 143 (140)

Magnetic exchange interactions in binuclear and tetranuclear iron(III) complexes described by spin-flip DFT and Heisenberg effective Hamiltonians. [PDF]

open access: yesJ Comput Chem, 2023
Exchange interactions in polynuclear Fe (III) compounds are derived from ab initio calculations based on a single spin‐flip (1SF) approach. Abstract Low‐energy spectra of single‐molecule magnets (SMMs) are often described by Heisenberg Hamiltonians.
Kotaru S   +3 more
europepmc   +2 more sources

Critical review of 16S rRNA gene sequencing workflow in microbiome studies: From primer selection to advanced data analysis

open access: yesMolecular Oral Microbiology, Volume 38, Issue 5, Page 347-399, October 2023., 2023
Abstract The multi‐batch reanalysis approach of jointly reevaluating gene/genome sequences from different works has gained particular relevance in the literature in recent years. The large amount of 16S ribosomal ribonucleic acid (rRNA) gene sequence data stored in public repositories and information in taxonomic databases of the same gene far exceeds ...
Alba Regueira‐Iglesias   +3 more
wiley   +1 more source

Examining the production, export, and immediate fate of kelp detritus on open‐coast subtidal reefs in the Northeast Atlantic

open access: yesLimnology and Oceanography, Volume 67, Issue S2, Page S36-S49, November 2022., 2022
Abstract Kelp forests are highly productive coastal habitats and are emerging as important sources of organic matter for other ecosystems. Although their high rates of productivity and detritus release are expected to lead to substantial export of carbon, few studies have actually quantified rates of export or the persistence of detritus.
Dan A. Smale   +3 more
wiley   +1 more source

∗‐Ricci Tensor on α‐Cosymplectic Manifolds

open access: yesAdvances in Mathematical Physics, Volume 2022, Issue 1, 2022., 2022
In this paper, we study α‐cosymplectic manifold M admitting ∗‐Ricci tensor. First, it is shown that a ∗‐Ricci semisymmetric manifold M is ∗‐Ricci flat and a ϕ‐conformally flat manifold M is an η‐Einstein manifold. Furthermore, the ∗‐Weyl curvature tensor W∗ on M has been considered.
M. R. Amruthalakshmi   +4 more
wiley   +1 more source

Financialization, common stochastic trends, and commodity prices

open access: yesJournal of Futures Markets, Volume 41, Issue 12, Page 1988-2008, December 2021., 2021
Abstract Commodity financialization has been a subject of discussion since the 2008 financial crisis. It is estimated that between 2003 and 2008, index investorsʼ positions increased from $13 billion to $317 billion. Surprisingly, most studies, predominantly based on Granger‐causality testing, find no relationship between financialization and commodity
Moses M. Kupabado, Juergen Kaehler
wiley   +1 more source

Kant's a priori history of metaphysics: Systematicity, progress, and the ends of reason

open access: yesEuropean Journal of Philosophy, Volume 29, Issue 4, Page 811-826, December 2021., 2021
Abstract This paper explores Kant's conception of the relation between philosophy and its history. The idea that philosophy must account for its historical development is often associated with German Idealism. On the traditional view, the German Idealists departed from the ahistorical Kantian framework by conceiving of reason in a developmental manner,
Pavel Reichl
wiley   +1 more source

Robotic Assay for Drought (RoAD): an automated phenotyping system for brassinosteroid and drought responses

open access: yesThe Plant Journal, Volume 107, Issue 6, Page 1837-1853, September 2021., 2021
Significance Statement RoAD is an automated phenotyping system for assessing brassinosteroid and drought responses in soil‐grown Arabidopsis plants. The system performs daily weighing, watering, and imaging tasks and is capable of accurately measuring morphological and growth‐related traits of Arabidopsis in 3D.
Lirong Xiang   +14 more
wiley   +1 more source

On canonscal quasi-geodesic mappings of recurrent-parabolic spaces

open access: yesPracì Mìžnarodnogo Geometričnogo Centru, 2018
The article is devoted to the problem of holomorphically projective transformations of locally conformal Kaehler manifolds. it's worth to be noted,  that J. Mikes and Z.
Yevhen Cherevko, Olena Chepurna
doaj   +1 more source

Chen‐Ricci Inequalities with a Quarter Symmetric Connection in Generalized Space Forms

open access: yesAdvances in Mathematical Physics, Volume 2021, Issue 1, 2021., 2021
In this article, we obtain improved Chen‐Ricci inequalities for submanifolds of generalized space forms with quarter‐symmetric metric connection, with the help of which we completely characterized the Lagrangian submanifold in generalized complex space form and a Legendrian submanifold in a generalized Sasakian space form.
Ali H. Al-Khaldi   +4 more
wiley   +1 more source

Integrability of almost Kaehler manifolds [PDF]

open access: yesProceedings of the American Mathematical Society, 1969
The tangent bundle of a nonflat Riemannian manifold is the only known example of a non Kählerian almost Kähler manifold, flatness being the integrability condition of the almost complex structure. These spaces are not compact. For those which are, it is a strong conjecture that if the almost hermitian metric is an Einstein metric the manifold is ...
openaire   +2 more sources

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