Results 1 to 10 of about 2,734,185 (277)

Non-Mechanical Beam Steering with Polarization Gratings: A Review

open access: yesCrystals, 2021
Polarization gratings (PGs) enable a novel architecture for dynamic non-mechanical steering of light over large angles and with large clear apertures. This beam steering approach has many applications in active sensing and optical communications. In this
Christopher Hoy   +5 more
doaj   +1 more source

Evaluation of POD based surrogate models of fields resulting from nonlinear FEM simulations

open access: yesAdvanced Modeling and Simulation in Engineering Sciences, 2021
Surrogate modelling is a powerful tool to replace computationally expensive nonlinear numerical simulations, with fast representations thereof, for inverse analysis, model-based control or optimization.
Boukje M. de Gooijer   +3 more
doaj   +1 more source

Comprehensive review of various control strategies for quadrotor unmanned aerial vehicles [PDF]

open access: yesFME Transactions, 2023
The Quadrotor Unmanned Aerial Vehicles (UAVs) have gained significant attention in recent years due to their versatile applications in civilian and military sectors.
Singh Brajesh Kumar   +2 more
doaj   +1 more source

Time-resolved photoelectron spectroscopy of organic molecules in aqueous solutions [PDF]

open access: yesEPJ Web of Conferences, 2019
We use time-resolved photoelectron spectroscopy with wavelength-selected XUV femtosecond pulses to study photoinduced dynamics of organic molecules in solutions at millimolar concentrations.
Hummert Johan   +5 more
doaj   +1 more source

ADVANCED OPTICAL TECHNIQUES TO EXPLORE BRAIN STRUCTURE AND FUNCTION [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2013
Understanding brain structure and function, and the complex relationships between them, is one of the grand challenges of contemporary sciences. Thanks to their flexibility, optical techniques could be the key to explore this complex network.
L. SILVESTRI   +4 more
doaj   +1 more source

Higher order solitary solutions to the meta-model of diffusively coupled Lotka–Volterra systems

open access: yesAdvances in Difference Equations, 2021
A meta-model of diffusively coupled Lotka–Volterra systems used to model various biomedical phenomena is considered in this paper. Necessary and sufficient conditions for the existence of nth order solitary solutions are derived via a modified inverse ...
Inga Timofejeva   +4 more
doaj   +1 more source

Optical inter-site spin transfer probed by energy and spin-resolved transient absorption spectroscopy

open access: yesNature Communications, 2020
Optically driven spin transfer is the fastest process to manipulate magnetism. Here, the authors show that this process emerges as the dominant mechanism in femtosecond spin dynamics enabling to the engineering of functional magnetic systems for future ...
Felix Willems   +8 more
doaj   +1 more source

Distinct clusters of movement entropy in children’s exploration of a virtual reality balance beam

open access: yesFrontiers in Psychology, 2023
Although assessing motor competence is vital to advancing current understandings of motor development and its significance in various fields, no consensus exists on how the construct should be operationalised and measured.
Håvard Lorås   +4 more
doaj   +1 more source

Seismic nonlinear vibration control algorithm for high-rise buildings

open access: yesNonlinear Engineering, 2022
It is necessary to study the seismic problem of buildings and structures for various safety reasons. Such as prevent and to reduce the damage caused by earthquakes to the greatest extent possible, research feasible analysis methods, and simulate the ...
Liu Qian   +3 more
doaj   +1 more source

No Chattering and Adaptive Sliding Mode Control of a Fractional-Order Phase Converter with Disturbances and Parameter Uncertainties

open access: yesComplexity, 2018
Discussing the dynamical properties of various power system models is of significant importance in order to understand its complete behavior. Even though there are many literatures discussing about the chaotic behavior shown by phase converter circuits ...
Karthikeyan Rajagopal   +4 more
doaj   +1 more source

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