Results 61 to 70 of about 1,029,283 (311)

Mechanisms of parasite‐mediated disruption of brain vessels

FEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira, Sílvia Arroz‐Madeira, Cláudio A. Franco, Sara Silva Pereira   +3 more
wiley   +1 more source

Event Systems and Access Control [PDF]

, 2006
We consider the interpretations of notions of access control (permissions, interdictions, obligations, and user rights) as run-time properties of information systems specified as event systems with fairness.
Merz, Stephan, Méry, Dominique
core   +3 more sources

PROFESSIONAL HEALTH OF THE PENITENTIARY SYSTEM STAFF: COMPONENTS AND CONDITIONS OF PRESERVATION [PDF]

, 2022
R. N. Kiseleva
openalex   +1 more source

Linear energy-preserving integrators for Poisson systems [PDF]

BIT Numerical Mathematics, 2011
The authors introduce a new class of energy conserving integrators in order to solve initial value problems for non-canonical Hamiltonian systems. In contrast to similar integrators, these are invariant to linear transformations. They also conserve quadratic Casimir functions and they are of arbitrarily order of accuracy.
Cohen, David, Hairer, Ernst
openaire   +5 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Discrete Nonholonomic LL Systems on Lie Groups

, 2004
This paper applies the recently developed theory of discrete nonholonomic mechanics to the study of discrete nonholonomic left-invariant dynamics on Lie groups.
, Arnold V I, Bloch A M, Bloch A M, Bobenko A I, Chaplygin S A, Cortés J, de León M Martín de Diego D Santamaría Merino A, Dmitry V Zenkov, Fedorov Yu N, Fedorov Yu N, Gray A, Helgason S, Jovanović B, Kozlov V V, Kozlov V V, Marsden J E, Marsden J E, Marsden J E, McLachlan R, Moser J, Neimark Ju I, Suslov G, Veselov A P, Veselov A P, Wendland J M, Whittaker E T, Yuri N Fedorov, Zenkov D V, Zenkov D V, Zenkov D V   +30 more
core   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Energy-Preserving Integrators Applied to Nonholonomic Systems [PDF]

Journal of Nonlinear Science, 2019
We introduce energy-preserving integrators for nonholonomic mechanical systems. We will see that the nonholonomic dynamics is completely determined by a triple $({\mathcal D}^*, Π, \mathcal{H})$, where ${\mathcal D}^*$ is the dual of the vector bundle determined by the nonholonomic constraints, $Π$ is an almost-Poisson bracket (the nonholonomic bracket)
Elena Celledoni, Marta Farré Puiggalí, Eirik Hoel Høiseth, David Martín de Diego   +3 more
openaire   +5 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Geometric analysis of noisy perturbations to nonholonomic constraints

, 2017
We propose two types of stochastic extensions of nonholonomic constraints for mechanical systems. Our approach relies on a stochastic extension of the Lagrange-d'Alembert framework. We consider in details the case of invariant nonholonomic systems on the
AM Bloch, AM Bloch, D Schneider, D Shi, DD Holm, DD Holm, F Gay-Balmaz, F Gay-Balmaz, G Pavliotis, G Suslov, J-A Lázaro-Camí, N Bou-Rabee, S Hochgerner, S Hochgerner, VI Arnold, VV Kozlov, VV Kozlov   +16 more
core   +1 more source