Results 31 to 40 of about 274,651 (285)

Discrete Nonholonomic Lagrangian Systems on Lie Groupoids [PDF]

, 2007
This paper studies the construction of geometric integrators for nonholonomic systems. We derive the nonholonomic discrete Euler-Lagrange equations in a setting which permits to deduce geometric integrators for continuous nonholonomic systems (reduced or
A. Coste, A. Weinstein, A.I. Bobenko, A.I. Bobenko, A.M. Bloch, A.M. Bloch, A.P. Veselov, B. Leimkuhler, D. Saunders, D. Zenkov, David Iglesias, David Martín de Diego, E. Hairer, E. Martínez, Eduardo Martínez, F. Cantrijn, F. Cantrijn, J. Cortés, J. Cortés, J. Cortés, J. Koiller, J. Moser, J. Neimark, J.C. Marrero, J.E. Marsden, J.E. Marsden, J.E. Marsden, J.E. Marsden, J.E. Marsden, J.M. Sanz-Serna, Juan C. Marrero, K. Mackenzie, L. Bates, M. León de, M. León de, M. León de, M. León de, R. McLachlan, R. McLachlan, S.M. Jalnapurkar, T. Mestdag, T. Mestdag, V.I. Arnold, Y.N. Fedorov, Y.N. Fedorov, Y.N. Fedorov, Y.N. Fedorov   +46 more
core   +2 more sources

Dual-Time Topological Geometry and the Emergence of Temporal Asymmetry in Non-Equilibrium Dynamics

Mathematics
We develop a dual-time topological framework for the mathematical description of non-equilibrium systems, aimed at reconciling time-reversible microscopic dynamics with irreversible macroscopic behavior.
Mohamed Haj Yousef
doaj   +1 more source

Dynamic fitness landscapes: Expansions for small mutation rates [PDF]

, 2000
We study the evolution of asexual microorganisms with small mutation rate in fluctuating environments, and develop techniques that allow us to expand the formal solution of the evolution equations to first order in the mutation rate.
Demetrius, Drake, Eigen, Eigen, Eigen, Jones, Jones, Leuthäusser, Levin, Nilsson, Ronnewinkel, Swetina, Tarazona, Wilke, Yoshimura   +14 more
core   +3 more sources

Finite element methods for fourth order axisymmetric geometric evolution equations [PDF]

Journal of Computational Physics, 2019
Fourth order curvature driven interface evolution equations frequently appear in the natural sciences. Often axisymmetric geometries are of interest, and in this situation numerical computations are much more efficient. We will introduce and analyze several new finite element schemes for fourth order geometric evolution equations in an axisymmetric ...
Barrett J. W., Garcke H., Nürnberg R.
openaire   +4 more sources

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

Bianchi Type I Cosmological Models in Eddington-inspired Born–Infeld Gravity

Galaxies, 2014
We consider the dynamics of a barotropic cosmological fluid in an anisotropic, Bianchi type I space-time in Eddington-inspired Born–Infeld (EiBI) gravity.
Tiberiu Harko, Francisco S.N. Lobo, Man Kwong Mak   +2 more
doaj   +1 more source

Dynamical system analysis of self-interacting three-form field cosmological model: stability and bifurcation

European Physical Journal C: Particles and Fields, 2021
The present work deals with Cosmological model of a three-form field, minimally coupled to gravity and interacting with cold dark matter in the background of flat FLRW space-time. By suitable choice of the dimensionless variables, the evolution equations
Soumya Chakraborty, Sudip Mishra, Subenoy Chakraborty   +2 more
doaj   +1 more source

QCD Saturation Equations including Dipole-Dipole Correlation

, 2004
We derive two coupled non-linear evolution equations corresponding to the truncation of the Balitsky infinite hierarchy of saturation equations after inclusion of dipole-dipole correlations, i.e. one step beyond the Balitsky-Kovchegov (BK) equation.
E. A. Kuraev, G. Parisi, I. I. Balitsky, L. N. Lipatov, L. N. Lipatov, L. N. Lipatov, R. Peschanski, Romuald A. Janik   +7 more
core   +1 more source

Proof of the Thin Sandwich Conjecture [PDF]

, 1993
We prove that the Thin Sandwich Conjecture in general relativity is valid, provided that the data $(g_{ab},\dot g_{ab})$ satisfy certain geometric conditions.
A. E. Fischer, A. Komar, C. M. Pereira, C. W. Misner, D. Christodoulou, E. P. Belasco, Gyula Fodor, J. M. Arms, P. G. Bergmann, R. F. Baierlein, Robert Bartnik, T. Hughes, V. Moncrief, Y. Choquet-Bruhat, Y. Choquet-Bruhat, Y. Choquet-Bruhat   +15 more
core   +2 more sources

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

FEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai, Mizuki Seo, Gyath Karadsheh, Fachrur Rizal Mahendra, Máté Á Demény, Ferenc Győry, János András Mótyán, László Fésüs, Endre Kristóf, Rini Arianti   +9 more
wiley   +1 more source