Results 61 to 70 of about 1,206,650 (354)
An Optimized Covering Spheroids by Spheres
Applied Sciences, 2020 Covering spheroids (ellipsoids of revolution) by different spheres is studied. The research is motivated by packing non-spherical particles arising in natural sciences, e.g., in powder technologies.
Alexander Pankratov +3 more
doaj +1 more source
A sharp convergence theorem for the mean curvature flow in spheres I [PDF]
arXiv, 2021 In this paper, we prove a sharp convergence theorem for the mean curvature flow of arbitrary codimension in spheres which improves Baker's convergence theorem. In particular, we obtain a new differentiable sphere theorem for submanifolds in spheres.
arxiv
Improved sphere packing lower bounds from Hurwitz lattices [PDF]
Advances in Mathematics 227 (2011), pp. 2144-2156, 2011 In this paper we prove an asymptotic lower bound for the sphere packing density in dimensions divisible by four. This asymptotic lower bound improves on previous asymptotic bounds by a constant factor and improves not just lower bounds for the sphere packing density, but also for the lattice sphere packing density and, in fact, the Hurwitz lattice ...
arxiv +1 more source
Making tau amyloid models in vitro: a crucial and underestimated challenge
FEBS Letters, EarlyView.This review highlights the challenges of producing in vitro amyloid assemblies of the tau protein. We review how accurately the existing protocols mimic tau deposits found in the brain of patients affected with tauopathies. We discuss the important properties that should be considered when forming amyloids and the benchmarks that should be used to ...
Julien Broc, Clara Piersson, Yann Fichou
wiley +1 more source
Analytic solutions to the Maxwell-London equations and levitation force for a superconducting sphere in a quadrupole field [PDF]
, 2018 Recent proposals suggest using magnetically trapped superconducting spheres in the Meissner state to create low-loss mechanical oscillators with long coherence times. In these proposals the derivation of the force on the superconducting sphere and the coupling to the sphere typically relies on a vanishing penetration depth $\lambda$ as well as a ...
arxiv +1 more source
Unraveling Mycobacterium tuberculosis acid resistance and pH homeostasis mechanisms
FEBS Letters, EarlyView.Mycobacterium tuberculosis exhibits a remarkable resilience to acid stress. In this Review, we discuss some of the molecular mechanisms and metabolic pathways used by the tubercle bacilli to adapt and resist host‐mediated acid stress. Mycobacterium tuberculosis (Mtb) is a successful pathogen that has developed a variety of strategies to survive and ...
Janïs Laudouze +3 more
wiley +1 more source
, 2003 We prove the existence of an abundance of new Einstein metrics on odd dimensional spheres including exotic spheres, many of them depending on continuous parameters. The number of families as well as the number of parameter grows double exponentially with
Boyer, Charles P. +2 more
core +3 more sources
Mathematical Modelling and Analysis, 2006 We consider flows on a spherical surface and use a streamfunction formulation to derive a nonlinear equation governing steady-state flows in that geometry. We present some new vortex solutions to this equation.
Alobaidi, G., Haslam, M. C., Mallier, R.
openaire +5 more sources
FEBS Letters, EarlyView.Toll‐like receptors (TLRs) are important in the innate immune system. This study explores the zinc‐binding ability of the TLR2 TIR domain (TLR2TIR). We found that TLR2TIR binds zinc with nanomolar affinity through its cysteine residues. Two of them, C673 and C713, are vital for receptor activation, indicating that zinc may play a role in initiating ...
Vladislav A. Lushpa +8 more
wiley +1 more source
Bulk and wetting phenomena in a colloidal mixture of hard spheres and platelets
, 2004 Density functional theory is used to study binary colloidal fluids consisting of hard spheres and thin platelets in their bulk and near a planar hard wall.
L. Harnau +3 more
core +1 more source