Results 31 to 40 of about 293,893 (299)
MachinesDC link power supply systems that integrate power electronic converters are increasingly being adopted. In particular, emerging “source–load” systems, in which the DC link interfaces with converters, have attracted increasing research interest due to ...
Dirui Yang +5 more
doaj +1 more source
Oscillation criteria for third order delay nonlinear differential equations
Electronic Journal of Qualitative Theory of Differential Equations, 2012 The purpose of this paper is to give oscillation criteria for the third order delay nonlinear differential equation \begin{equation*} \lbrack a_{2}(t)\{(a_{1}(t)(x^{\prime }(t))^{\alpha _{1}})^{\prime}\}^{\alpha _{2}}]^{\prime }+q(t)f(x(g(t)))=0, \end ...
E. Elabbasy +2 more
doaj +1 more source
Frontiers in Integrative Neuroscience, 2022 Synchronization of neuronal discharges on the millisecond scale has long been recognized as a prevalent and functionally important attribute of neural activity.
Kai S. Gansel
doaj +1 more source
Oscillation criteria for second order nonlinear neutral differential equations of mixed type
Electronic Journal of Qualitative Theory of Differential Equations, 2012 Some oscillation criteria are established for the second order nonlinear neutral differential equations of the form \begin{equation*} \left( \left( x(t)+a x(t-\tau_1)-b x(t+\tau_2)\right)^\alpha\right)''=q(t) x^\beta (t-\sigma_1)+p(t)x^\beta(t+\sigma_2)
Ethiraju Thandapani, Renu Rama
doaj +1 more source
Antiperiodic oscillations [PDF]
Scientific Reports, 2013 The investigation of regular and irregular patterns in nonlinear oscillators is an outstanding problem in physics and in all natural sciences. In general, regularity is understood as tantamount to periodicity. However, there is now a flurry of works proving the existence of "antiperiodicity", an unfamiliar type of regularity.
Freire, Joana G. +4 more
openaire +3 more sources
The role and implications of mammalian cellular circadian entrainment
FEBS Letters, EarlyView.At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley +1 more source
Comparison theorem for oscillation of fourth-order nonlinear retarded dynamic equations
Electronic Journal of Qualitative Theory of Differential Equations, 2013 This work is concerned with oscillation of a class of fourth-order nonlinear delay dynamic equations on a time scale. A new comparison theorem is established that improves related results reported in the literature.
Chenghui Zhang +2 more
doaj +1 more source
Set-Valued and Variational Analysis, 2017 In previous work by Beer and Levi [8, 9], the authors studied the oscillation $ (f,A)$ of a function $f$ between metric spaces $\langle X,d \rangle$ and $\langle Y, \rangle$ at a nonempty subset $A$ of $X$, defined so that when $A =\{x\}$, we get $ (f,\{x\}) = (f,x)$, where $ (f,x)$ denotes the classical notion of oscillation of $f$ at the point $
Beer, Gerald, Cao, Jiling
openaire +2 more sources
Molecular bases of circadian magnesium rhythms across eukaryotes
FEBS Letters, EarlyView.Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley +1 more source