Results 51 to 60 of about 371,899 (263)
Feynman propagator in curved space-time
Physical Review D, 1977 The Wick rotation is generalized in a covariant manner so as to apply to curved manifolds in a way that is independent of the analytic properties of the manifold. This enables us to show that various methods for defining a Feynman propagator to be found in the literature are equivalent where they are applicable. We are also able to discuss the relation
Candelas, P, Raine, D
openaire +2 more sources
Explicit time-dependent Schrodinger propagators [PDF]
Journal of Physics A: Mathematical and General, 1986 We compute explicitly the time-dependent Schrödinger and heat propagator for the potentials \(-[\lambda^ 2m(m+1)]/\cosh^ 2\lambda x\), a \(\delta\) function potential, several cases of periodic \(\delta\) function potentials and a \(\delta\) function potential in a square well. We also discuss the semiclassical approximation for the \(\delta\) function
Gaveau, Bernard, Schulman, Lawrence S.
openaire +1 more source
FEBS Letters, EarlyView.Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi +5 more
wiley +1 more source
BuildingsReinforced concrete structures deteriorate over time when exposed to environmental effects throughout their service life, resulting in a loss of structural performance and ultimately a reduction in service life.
Seda Akduman
doaj +1 more source
Short-time quantum propagator and Bohmian trajectories [PDF]
Physics Letters A, 2013 We begin by giving correct expressions for the short-time action; following the work of one of us and Makri--Miller. We use these estimates to derive a correct expression modulo modulo delta(t)sqr for the quantum propagator and we show that the quantum potential is negligible modulo delta(t)sqr for a point source.
de Gosson, Maurice, Hiley, Basil J.
openaire +4 more sources
Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation
FEBS Letters, EarlyView.Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe +3 more
wiley +1 more source
AtmosphereDrought events have become more frequent worldwide under ongoing climate change. However, how precipitation deficits evolve into runoff deficits across contrasting dry and humid climate regions, and which factors control this transition, remains ...
Jingjing Fan +4 more
doaj +1 more source
Time Delays in Cosmic Ray Propagation [PDF]
Journal of Sciences, Islamic Republic of Iran, 2011 Cosmic Rays (CR) travel at speeds essentially indistinguishable from the speed of light. However whilst travelling through magnetic fields, both regular and turbulent, they are delayed behind the light since they are usually charged particles and their ...
P. Davoudifar
doaj
A Time-Integral Crack Propagation Model Considering Thickness Effect
IEEE Access, 2019 The crack propagation mechanism of thick plates is difficult to describe accurately, and thus, it is difficult to predict the lifetimes of thick plate structural cracks in extreme construction environments.
Junzhou Huo +5 more
doaj +1 more source
Equivalent Waveform Propagation for Static Timing Analysis [PDF]
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2004 This paper proposes a scheme that captures diverse input waveforms of CMOS gates for static timing analysis (STA).
Masanori Hashimoto +2 more
openaire +1 more source