Results 41 to 50 of about 731,067 (193)

Stability Issues for w < -1 Dark Energy [PDF]

open access: yes, 2003
Precision cosmological data hint that a dark energy with equation of state $w = P/\rho < -1$ and hence dubious stability is viable. Here we discuss for any $w$ nucleation from $\Lambda > 0$ to $\Lambda = 0$ in a first-order phase transition. The critical
Carroll S. M., PAUL H. FRAMPTON
core   +2 more sources

On stability of an optimal situation in a finite cooperative game with a parametric concept of equilibrium (from lexicographic optimality to Nash equilibrium) [PDF]

open access: yesComputer Science Journal of Moldova, 2005
A parametric concept of equilibrium (principle of optimality) in a finite cooperative game in normal form of several players is introduced. This concept is defined by means of the partition of players into coalitions.
Sergey E. Bukhtoyarov   +1 more
doaj  

Iron fluorescence from within the innermost stable orbit of black hole accretion disks [PDF]

open access: yes, 1997
The fluorescent iron Ka line is a powerful observational probe of the inner regions of black holes accretion disks. Previous studies have assumed that only material outside the radius of marginal stability can contribute to the observed line emission ...
Blandford R. D.   +21 more
core   +2 more sources

On Stable Instances of MINCUT

open access: yesМоделирование и анализ информационных систем, 2014
A combinatorial optimization problem is called stable if its solution is preserved under perturbation of the input parameters that do not exceed a certain threshold – the stability radius.
I. V. Kozlov
doaj   +1 more source

Modeling Car-Following Behaviour of Turning Movements at Intersections with Consideration of Turning Radius

open access: yesJournal of Advanced Transportation, 2020
In order to deeply analyze and describe the characteristics of car-following behaviour of turning vehicles at intersections, the features and application conditions of classic car-following models were analyzed firstly.
Fulu Wei   +5 more
doaj   +1 more source

Elderly unstable distal radius fractures a prospective cohort study of bone substitutes-augmented percutaneous pinning

open access: yesBMC Musculoskeletal Disorders, 2022
Highlights 1- When used to augment percutaneous pinning of elderly unstable distal radius fractures, bone substitutes did not significantly offer additional postoperative mechanical stability of fixation construct.
Amr Abdel-Mordy Kandeel
doaj   +1 more source

On Some Sufficiency-Type Stability and Linear State-Feedback Stabilization Conditions for a Class of Multirate Discrete-Time Systems

open access: yesMathematics, 2018
This paper presents and discusses the stability of a discrete multirate sampling system whose sets of sampling rates (or sampling periods) are the integer multiple of those operating on all the preceding substates.
M. De la Sen
doaj   +1 more source

Analytical stability models for turning and boring operations [PDF]

open access: yes, 2006
In this paper an analytical model for stability limit predictions in turning and boring operations is proposed. The multi-dimensional model includes the 3D geometry of the processes. In addition a model for the chip thickness at the insert nose radius is
Budak, Erhan, Ozlu, Emre, Özlü, Emre
core  

Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History [PDF]

open access: yes, 1998
We make a detailed study of boson star configurations in Jordan--Brans--Dicke theory, studying both equilibrium properties and stability, and considering boson stars existing at different cosmic epochs.
Andrew R Liddle   +17 more
core   +2 more sources

Efficient Method for Computing Lower Bounds on the $p$-radius of Switched Linear Systems

open access: yes, 2016
This paper proposes lower bounds on a quantity called $L^p$-norm joint spectral radius, or in short, $p$-radius, of a finite set of matrices. Despite its wide range of applications to, for example, stability analysis of switched linear systems and the ...
Brewer   +21 more
core   +1 more source

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