Results 41 to 50 of about 196,816 (332)
Network topology drives population temporal variability in experimental habitat networks
Population Ecology, EarlyView.Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu +3 more
wiley +1 more source
The quantum Cartan algebra associated to a bicovariant differential calculus
, 2010 We associate to any (suitable) bicovariant differential calculus on a quantum group a Cartan Hopf algebra which has a left, respectively right, representation in terms of left, respectively right, Cartan calculus operators.
Cirio, Lucio S. +2 more
core +1 more source
Covariant four dimensional differential calculus in κ-Minkowski
Physics Letters B, 2022 It is generally believed that it is not possible to have a four dimensional differential calculus in κ-Minkowski spacetime, with κ-Poincaré relativistic symmetries, covariant under (κ-deformed) Lorentz transformations.
Giacomo Rosati
doaj
A Differentiation Theory for Itô's Calculus [PDF]
Stochastic Analysis and Applications, 2006 A peculiar feature of It 's calculus is that it is an integral calculus that gives no explicit derivative with a systematic differentiation theory counterpart, as in elementary calculus. So, can we define a pathwise stochastic derivative of semimartingales with respect to Brownian motion that leads to a differentiation theory counterpart to It 's ...
openaire +4 more sources
FEBS Letters, EarlyView.The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang +2 more
wiley +1 more source
Abstract and Applied Analysis, 2013 The traditional integer-order partial differential equation-based image denoising approaches often blur the edge and complex texture detail; thus, their denoising effects for texture image are not very good.
Yi-Fei Pu +4 more
doaj +1 more source
The British Journal of Radiology, 1995 A previously well 8-year-old girl presented to a casualty department with a 3-week history of urinary frequency, dysuria and nocturia associated with intermittent abdominal pain. She had also had 10 days of watery diarrhoea following antibiotic treatment given by her general practitioner.
D J Roebuck, L M MacDonald
openaire +3 more sources
A stepwise emergence of evolution in the RNA world
FEBS Letters, EarlyView.How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley +1 more source
Polyhedral representations of discrete differential manifolds
, 1996 Any discrete differential manifold $M$ (finite set endowed with an algebraic differential calculus) can be represented by appropriate polyhedron ${\cal P}(M)$.
Zapatrin, Roman R.
core +1 more source
Optimal Tax Trajectory of a Commercial Organisation: Economic and Mathematical Approach
MathematicsThe aim of this study is to form a new concept of tax burden calculation—optimal tax trajectory, which meets the needs of economic entities in view of the optimisation of tax payments and state authorities in terms of budget replenishment and subsequent ...
Kristina Alekseyevna Zakharova +3 more
doaj +1 more source