Results 41 to 50 of about 1,163,546 (321)

Singular Perturbations in Viscoelasticity

Rocky Mountain Journal of Mathematics, 1993
We study the singular perturbation for a class of partial integro- differential equations in viscoelasticity of the form \[ \rho u^ \rho_{tt} (t,x) = Eu^ \rho_{xx} (t,x) + \int ^ t _{-\infty} a (t-s) u^ \rho_{xx} (s,x) ds + \rho g (t,x) + f (x),\tag{a} \] when the density \(\rho\) of the material goes to zero. We will prove that when \(\rho \to 0\) the
Grimmer, Ronald, Liu, Hetao
openaire   +3 more sources

Avionic Air Data Sensors Fault Detection and Isolation by means of Singular Perturbation and Geometric Approach

Sensors, 2017
Singular Perturbations represent an advantageous theory to deal with systems characterized by a two-time scale separation, such as the longitudinal dynamics of aircraft which are called phugoid and short period.
Paolo Castaldi, Nicola Mimmo, Silvio Simani   +2 more
doaj   +1 more source

Cosmological Perturbations Through a Non-Singular Ghost-Condensate/Galileon Bounce [PDF]

, 2014
We study the propagation of super-horizon cosmological perturbations in a non-singular bounce spacetime. The model we consider combines a ghost condensate with a Galileon term in order to induce a ghost-free bounce.
Battarra, Lorenzo, Koehn, Michael, Lehners, Jean-Luc, Ovrut, Burt A.   +3 more
core   +3 more sources

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Quasinormal forms for systems of two equations with large delay [PDF]

Известия высших учебных заведений: Прикладная нелинейная динамика
A system of two equations with delay is considered. The purpose of this work is to study the local dynamics of this system under the assumption that the delay parameter is sufficiently large.
Kashchenko, Sergej Aleksandrovich, Tolbey, A. O.   +1 more
doaj   +1 more source

Singular perturbations and Lindblad-Kossakowski differential equations

, 2008
We consider an ensemble of quantum systems whose average evolution is described by a density matrix, solution of a Lindblad-Kossakowski differential equation.
Mirrahimi, Mazyar, Rouchon, Pierre
core   +3 more sources

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Motion Control of a Quadrotor Aircraft via Singular Perturbations

International Journal of Advanced Robotic Systems, 2013
In this paper, a new motion controller for a quadrotor aircraft is introduced. A reformulation of the control inputs of the dynamic model is discussed and then the control algorithm is given in a constructive form.
Salvador González-Vázquez, Javier Moreno-Valenzuela   +1 more
doaj   +1 more source

Kicking the Rugby Ball: Perturbations of 6D Gauged Chiral Supergravity [PDF]

, 2006
We analyze the axially-symmetric scalar perturbations of 6D chiral gauged supergravity compactified on the general warped geometries in the presence of two source branes.
A J Tolley, Aghabababie Y, Azuelos G, Beauchemin P H, Burgess C P, Burgess C P de Rham C Hoover D Tolley A J, Burgess C P Hoover D, C de Rham, C P Burgess, Callin P Burgess C P, Carroll S M Guica M M, Carter B M N Nielsen A B Wiltshire D L, Chen J-W, Cline J M, D Hoover, D Mason, de Rham C, Forste S, Garriga J, Ghilencea D M, Hoover D, Kainulainen K Sunhede D, Kaloper N, Kofinas G, Lee H M Ludeling C, Lee H M Papazoglou A, Matias J, Minamitsuji M Naylor W Sasaki M, Misner C W, Nair V P, Navarro I, Navarro I, Navarro I, Parameswaran S L Randjbar-Daemi S Salvio A, Parameswaran S L Tasinato G Zavala I, Polchinski J, Randjbar-Daemi S, Tolley A, Tolley A J Burgess C P de Rham C Hoover D, Tolley A J Burgess C P de Rham C Hoover D, Weinberg S   +40 more
core   +2 more sources