Results 21 to 30 of about 91,410 (58)
Accelerated 3D metabolite T1 mapping of the brain using variable‐flip‐angle SPICE
Magnetic Resonance in Medicine, Volume 92, Issue 4, Page 1310-1322, October 2024.Abstract Purpose To develop a practical method to enable 3D T1 mapping of brain metabolites. Theory and Methods Due to the high dimensionality of the imaging problem underlying metabolite T1 mapping, measurement of metabolite T1 values has been currently limited to a single voxel or slice.
Yibo Zhao +9 more
wiley +1 more source
An analysis of high order FEM and IGA for explicit dynamics: Mass lumping and immersed boundaries
International Journal for Numerical Methods in Engineering, Volume 125, Issue 16, 30 August 2024.Summary We investigate the behavior of different shape functions for the discretization of hyperbolic problems. In particular, we consider classical Lagrange polynomials and B‐splines. The studies focus on the performance of the these functions as a spatial discretization approach combined with an explicit time marching scheme.
Lars Radtke +5 more
wiley +1 more source
Odd Scalar Curvature in Field-Antifield Formalism
, 2008 We consider the possibility of adding a Grassmann-odd function \nu to the odd Laplacian. Requiring the total \Delta operator to be nilpotent leads to a differential condition for \nu, which is integrable.
Batalin, Igor A., Bering, Klaus
core +1 more source
NMR in Biomedicine, Volume 37, Issue 8, August 2024.Dynamic images can be modeled as points on a smooth nonlinear manifold embedded in a high dimensional ambient space. The manifold regularization exploits the neighborhood relations of points on this manifold. Image frames sharing similar vocal tract postures are mapped as neighbors on the manifold even if they occur at different times (see the red and ...
Rushdi Zahid Rusho +8 more
wiley +1 more source
Gravitational waves in theories with a non-minimal curvature-matter coupling
, 2018 Gravitational waves in the presence of a non-minimal curvature-matter coupling are analysed, both in the Newman-Penrose and perturbation theory formalisms.
Bertolami, Orfeu +2 more
core +1 more source
On the optimal control of kinetic epidemic models with uncertain social features
Optimal Control Applications and Methods, Volume 45, Issue 2, Page 494-522, March/April 2024.We introduce a kinetic description of the impact of social heterogeneity in the spread of infectious diseases. An optimal control strategy is then designed to reduce the number of infected cases. We analyze the robustness of the defined protocols in driving the system towards a prescribed target even in the presence of limited information on the ...
Jonathan Franceschi +2 more
wiley +1 more source
Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
, 2006 A continuum model for the effective spin orbit interaction in graphene is derived from a tight-binding model which includes the $\pi$ and $\sigma$ bands.
Arne Brataas +9 more
core +1 more source
Relativistic Quantum Scattering on a Cone
, 2000 We study the relativistic quantum mechanical scattering of a bosonic particle by an infinite straight cosmic string, considering the non-minimal coupling between the bosonic field and the scalar curvature. In this case, an effective two-dimensional delta-
Abeverio S +17 more
core +1 more source
Effects of Variable Newton Constant During Inflation
, 2012 In this paper the effects of time-dependent Newton constant G during inflation are studied. We present the formalism of curvature perturbations in an inflationary system with a time-dependent Newton constant.
A. A. Starobinsky +10 more
core +1 more source
L p -estimates for the heat semigroup on differential forms, and related problems [PDF]
, 2017 We consider a complete non-compact Riemannian manifold satisfying the volume doubling property and a Gaussian upper bound for its heat kernel (on functions).
Magniez, Jocelyn, Ouhabaz, El Maati
core +2 more sources