Results 31 to 40 of about 1,406,233 (296)

Microlensing Makes Lensed Quasar Time Delays Significantly Time Variable

open access: yes, 2017
The time delays of gravitationally lensed quasars are generally believed to be unique numbers whose measurement is limited only by the quality of the light curves and the models for the contaminating contribution of gravitational microlensing to the ...
Kochanek, C. S., Tie, S. S.
core   +1 more source

Quasar optical variability: searching for interband time delays [PDF]

open access: yes, 2006
Aims. The main purpose of this paper is to study time delays between the light variations in different wavebands for a sample of quasars. Measuring a reliable time delay for a large number of quasars may help constraint the models of their central ...
Sundar Rajan, B., Susinder Rajan, G.
core   +1 more source

Leader-Following Consensus Control for Multiple Fixed-Wing UAVs’ Attitude System With Time Delays and External Disturbances

open access: yesIEEE Access, 2019
This paper proposes an algorithm of leader-following consensus control of multiple fixed-wing unmanned aerial vehicles'(UAVs) attitudes with time delays and unknown external disturbances.
Yu Tang   +4 more
doaj   +1 more source

Non-Linear Prediction-Based Trajectory Tracking for Non-Holonomic Mobile Robots

open access: yesIEEE Access, 2023
This work addresses the trajectory tracking problem for a non-holonomic differential drive mobile robot with a constant time delay $h$ at the input signal.
Julio A. Baez-Hernandez   +2 more
doaj   +1 more source

The effect of distributed time-delays on the synchronization of neuronal networks

open access: yes, 2016
Here we investigate the synchronization of networks of FitzHugh-Nagumo neurons coupled in scale-free, small-world and random topologies, in the presence of distributed time delays in the coupling of neurons.
Kachhvah, Ajay Deep
core   +1 more source

Delays and the Capacity of Continuous-time Channels [PDF]

open access: yes, 2011
Any physical channel of communication offers two potential reasons why its capacity (the number of bits it can transmit in a unit of time) might be unbounded: (1) Infinitely many choices of signal strength at any given instant of time, and (2) Infinitely
Khanna, Sanjeev, Sudan, Madhu
core   +7 more sources

Paramedic versus physician-staffed ambulances and prehospital delays in the management of patients with ST-segment elevation myocardial infarction

open access: yesCardiology Journal, 2021
BACKGROUND: Time delays to reperfusion therapy in ST-segment elevation myocardial infarction (STEMI) still remain a considerable drawback in many healthcare systems.
Artur Borowicz   +5 more
doaj   +1 more source

Nearest neighbor embedding with different time delays

open access: yes, 2006
A nearest neighbor based selection of time delays for phase space reconstruction is proposed and compared to the standard use of time delayed mutual information. The possibility of using different time delays for consecutive dimensions is considered.
C. Shannon   +6 more
core   +1 more source

Adaptive elimination of synchronization in coupled oscillator

open access: yesNew Journal of Physics, 2017
We present here an adaptive control scheme with a feedback delay to achieve elimination of synchronization in a large population of coupled and synchronized oscillators.
Shijie Zhou   +5 more
doaj   +1 more source

Hopf bifurcation analysis in a fractional-order survival red blood cells model and PD α $\mathit{PD}^{\alpha} $ control

open access: yesAdvances in Difference Equations, 2018
In this paper, we put forward a fractional-order survival red blood cells model and study the dynamics through the Hopf bifurcation. When the delay transcends the threshold, a series of Hopf bifurcations occur at the positive equilibrium.
Qingshan Sun   +6 more
doaj   +1 more source

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