Results 21 to 30 of about 915,662 (288)

Nonlocal Transformations for Accelerated Observers [PDF]

open access: yes, 2009
According to the locality postulate of special relativity, the measurements of physical fields by accelerated observers at a given event in Minkowski spacetime are related to each other by the representations of the Lorentz group.
Mashhoon, Bahram
core   +2 more sources

Observers in an accelerated universe [PDF]

open access: yes, 2011
If the current acceleration of our Universe is due to a cosmological constant, then a Coleman-De Luccia bubble will nucleate in our Universe. In this work, we consider that our observations could be likely in this framework, consisting in two infinite ...
A.D. Linde   +25 more
core   +3 more sources

Patterns of Eye Movements When Observers Judge Female Facial Attractiveness

open access: yesFrontiers in Psychology, 2017
The purpose of the present study is to explore the fixed model for the explicit judgments of attractiveness and infer which features are important to judge the facial attractiveness.
Yan Zhang   +5 more
doaj   +1 more source

Dynamic Positioning System for a Ship on Harbour Manoeuvring with Different Observers. Experimental Results

open access: yesPolish Maritime Research, 2014
In cases when the navigational space of the manoeuvre performed by the ship is severely limited, the procedures making use of the rudder blade, propeller screw, and thrusters are very complicated.
Tomera Mirosław
doaj   +1 more source

Observer-Based Fault-Tolerant Predictive Control for LPV Systems with Sensor Faults: An Active Car Suspension Application

open access: yesApplied Sciences, 2022
In this paper, an observer-based robust fault-tolerant predictive control (ORFTPC) strategy is proposed for Linear Parameter-Varying (LPV) systems subject to input constraints and sensor failures.
Abdelaziz Abboudi   +4 more
doaj   +1 more source

SoC Estimation in Lithium-Ion Batteries with Noisy Measurements and Absence of Excitation

open access: yesBatteries, 2023
Accurate State-of-Charge estimation is crucial for applications that utilise lithium-ion batteries. In real-time scenarios, battery models tend to present significant uncertainty, making it desirable to jointly estimate both the State of Charge and ...
Miquel Martí-Florences   +3 more
doaj   +1 more source

Passive States for Essential Observers

open access: yes, 2008
The aim of this note is to present a unified approach to the results given in \cite{bb99} and \cite{bs04} which also covers examples of models not presented in these two papers (e.g. $d$-dimensional Minkowski space-time for $d\geq 3$).
Borchers H. J.   +10 more
core   +2 more sources

Two observers calculate the trace anomaly [PDF]

open access: yes, 1995
We adapt a calculation due to Massacand and Schmid to the coordinate independent definition of time and vacuum given by Capri and Roy in order to compute the trace anomaly for a massless scalar field in a curved spacetime in 1+1 dimensions.
Capri, A. Z., Kobayashi, M., Lamb, D. J.
core   +2 more sources

Linear, Nonlinear, and Distributed-Parameter Observers Used for (Renewable) Energy Processes and Systems—An Overview

open access: yesEnergies
Full- and reduced-order observers have been used in many engineering applications, particularly for energy systems. Applications of observers to energy systems are twofold: (1) the use of observed variables of dynamic systems for the purpose of feedback ...
Verica Radisavljevic-Gajic   +2 more
doaj   +1 more source

Non-Bilocal Measurement via Entangled State

open access: yes, 2005
Two observers, who share a pair of particles in an entangled mixed state, can use it to perform some non-bilocal measurement over another bipartite system. In particular, one can construct a specific game played by the observers against a coordinator, in
Eran Shmaya   +3 more
core   +1 more source

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