Results 51 to 60 of about 170,832 (317)

A dynamical analysis of the proposed HU Aquarii planetary system [PDF]

open access: yes, 2011
It has recently been suggested that the eclipsing polar HU Aquarii is a host to at least two giant planets. We have performed highly detailed dynamical analyses of the orbits of those planets and showed that the proposed system is highly unstable on time-
Tinney, C. G.   +7 more
core   +1 more source

Bilinear dynamical systems [PDF]

open access: yesPhilosophical Transactions of the Royal Society B: Biological Sciences, 2005
In this paper, we propose the use of bilinear dynamical systems (BDS)s for model-based deconvolution of fMRI time-series. The importance of this work lies in being able to deconvolve haemodynamic time-series, in an informed way, to disclose the underlying neuronal activity.
W, Penny, Z, Ghahramani, K, Friston
openaire   +2 more sources

Holographic memory updated by contradictory information: influence of low frequency attenuation on response stability

open access: yesКомпьютерная оптика, 2020
A 6f-scheme of Fourier holography with resonant architecture is considered, which implements memory replenishment with new information that contradicts the previously recorded. It is shown that the low-frequency attenuation due to the nonlinearity of the
A.V. Pavlov
doaj   +1 more source

Oscillation thresholds via the novel MBR method with application to oncolytic virotherapy

open access: yesNonlinear Analysis, 2022
Oncolytic virotherapy is a therapy for the treatment of malignant tumours. In some undesirable cases, the injection of viral particles can lead to stationary oscillations, thus preventing the full destruction of the tumour mass.
Bruno Buonomo   +2 more
doaj   +1 more source

Dynamic Reasoning Systems [PDF]

open access: yesACM Transactions on Computational Logic, 2015
A dynamic reasoning system (DRS) is an adaptation of a conventional formal logical system that explicitly portrays reasoning as a temporal activity, with each extralogical input to the system and each inference rule application being viewed as occurring at a distinct timestep.
openaire   +2 more sources

Towards a Generalized Cayley–Dickson Construction through Involutive Dimagmas

open access: yesMathematics
A generalized construction procedure for algebraic number systems is hereby presented. This procedure offers an efficient representation and computation method for complex numbers, quaternions, and other algebraic structures.
Nelson Martins-Ferreira   +1 more
doaj   +1 more source

Temporal Asymmetry, Entropic Irreversibility, and Finite-Time Thermodynamics: From Parmenides–Einstein Time-Reversal Symmetry to the Heraclitan Entropic Arrow of Time

open access: yesEntropy, 2012
In this paper, we combine the two universalisms of thermodynamics and dynamical systems theory to develop a dynamical system formalism for classical thermodynamics. Specifically, using a compartmental dynamical system energy flow model we develop a state-
Wassim M. Haddad
doaj   +1 more source

Planar Bistable Structures Detection via the Conley Index and Applications to Biological Systems

open access: yesMathematics, 2023
Bistability is a ubiquitous phenomenon in life sciences. In this paper, two kinds of bistable structures in two-dimensional dynamical systems are studied: one is two one-point attractors, another is a one-point attractor accompanied by a cycle attractor.
Junbo Jia   +5 more
doaj   +1 more source

Dynamic system classifier [PDF]

open access: yesPhysical Review E, 2016
Stochastic differential equations describe well many physical, biological and sociological systems, despite the simplification often made in their derivation. Here the usage of simple stochastic differential equations to characterize and classify complex dynamical systems is proposed within a Bayesian framework. To this end, we develop a dynamic system
Pumpe, D.   +3 more
openaire   +4 more sources

The Dynamical History of 2060 Chiron and Its Proposed Ring System [PDF]

open access: yes, 2017
The surprising discovery of a ring system around the Centaur 10199 Chariklo in 2013 led to a reanalysis of archival stellar occultation data for the Centaur 2060 Chiron by Ortiz et al.
Jeremy Wood   +7 more
core   +1 more source

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