Results 51 to 60 of about 4,749,396 (175)

Tensionless string limits in 4d conformal manifolds

Journal of High Energy Physics
Drawing on insights from the Swampland program, we initiate a classification of infinite distance limits in the conformal manifolds of 4d SCFTs. Each limit is characterized by a Hagedorn-like behavior of the large N density of states, which we argue ...
José Calderón-Infante, Irene Valenzuela   +1 more
doaj   +1 more source

Looking at Soil as It Is: Evolution of Microscopic Soil Characterization From Kubiëna to Artificial Intelligence

Journal of Plant Nutrition and Soil Science, EarlyView.
We provide a historic overview of microscopic soil structure characterization from its founding father, Walter Kubiëna, to several technical revolutions like automation, digitalization, and artificial intelligence. In addition to technical advancements, we explore how concepts and research questions have evolved in time.
Steffen Schlüter, Maik Geers‐Lucas, Peter Kühn, Hans‐Jörg Vogel   +3 more
wiley   +1 more source

On super quasi Einstein manifold

, 2011
We study super quasi Einstein manifold and viscous fluid super quasi Einstein spacetime. The existence of super quasi Einstein manifold and viscous fluid super quasi Einstein spacetime are shown by two closely related examples.
Arabinda Konar, Pratyay Debnath
core   +1 more source

Curvature-induced dynamical effective spacetime dimension in an extension of general relativity

European Physical Journal C: Particles and Fields
We propose a covariant extension of general relativity in which the local effective dimension of spacetime is promoted to a dynamical, curvature-induced field on an underlying four-dimensional manifold.
L. Yıldız, D. Kaykı, E. Güdekli
doaj   +1 more source

Unveiling New Perspectives on the Hirota–Maccari System With Multiplicative White Noise

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In this study, we delve into the stochastic Hirota–Maccari system, which is subjected to multiplicative noise according to the Itô sense. The stochastic Hirota–Maccari system is significant for its ability to accurately model how stochastic affects nonlinear wave propagation, providing valuable insights into complex systems like fluid dynamics
Mohamed E. M. Alngar, Khaled A. Gepreel, Reham M. A. Shohib, Yakup Yildirim   +3 more
wiley   +1 more source

Generalized B-Curvature Tensor in Lorentzian Para-Kenmotsu Manifold with Semi-Symmetric Metric Connection

AppliedMath
The main object of this work is to study the generalized B-curvature tensor in an n-dimensional Lorentzian para-Kenmotsu (briefly, (LPK)n) manifold along a semi-symmetric metric connection ∇¯.
Rajendra Prasad, Najwa Mohammed Al-Asmari, Abdul Haseeb, Sushmita Sen   +3 more
doaj   +1 more source

Conformally flat Einstein-like 4-manifolds and conformally flat Riemannian 4-manifolds all of whose Jacobi operators have parallel eigenspaces along every geodesic

, 1997
A local classification of locally conformal flat Riemannian Einstein-like four-manifolds as well as a local classification of all locally conformal flat Riemannian four-manifolds for which all Jacobi operators have parallel eigenspaces along every geodesic is given. Non-trivial explicit examples are presented.
Ivanov, Stefan, Petrova, Irina
openaire   +2 more sources

Plant‐derived nanovesicles as potential drug delivery systems for topical use: Emerging applications in dermatology and cosmetology

VIEW, EarlyView.
Plant‐derived nanovesicles (PDNVs) are naturally secreted by fruit, vegetables, seeds, leaves and other natural sources. Used as drug delivery systems, they can combine intrinsic therapeutic activity, enhanced skin permeation and cargo‐carrying capacity, suitable for dermatological and cosmetic applications including hydration, antioxidant/anti ...
Dorotea Fiore, Beatrice Pellegrini, Antonia Mancuso, Maria Chiara Cristiano, Salvatore Panza, Donatella Paolino   +5 more
wiley   +1 more source

Characterization on N(k)-Mixed Quasi-Einstein Manifold

, 2019
[[abstract]]In the present paper we study characterizations of odd and even dimensional N(k)-mixed quasi-Einstein manifold and finally prove that a N(k)-mixed quasi-Einstein manifold is a semi mixed quasi- Einstein manifold under a certain condi ...
Arindam Bhattacharyya, Dipankar Debnath
core  

Depth‐resolved X‐ray residual stress analysis on samples with cylindrically shaped surface topography

Journal of Applied Crystallography, EarlyView.
Modifications of the fundamental equation of X‐ray stress analysis are proposed that allow correction of the hoop and longitudinal stresses obtained from sin2ψ measurements on samples featuring an inhomogeneous surface topography. The formalism is verified by angle‐ and energy‐dispersive measurements performed on a ferritic steel sample with ...
Manuela Klaus, Daniel Apel, Mirko Boin, Robert Wimpory, Christoph Genzel   +4 more
wiley   +1 more source