Search results for "BIF"
showing 10 items of 539 documents
On some bifurcation analysis techniques for continuous systems
2016
This paper is devoted to techniques in bifurcation analysis for continuous mechanical systems, concentrating on polynomial equations and implicitly given functions. These are often encountered in problems of mechanics and especially in stability analysis. Taking a classical approach, we summarize the relevant features of the cubic polynomial equation, and present some new aspects for asymptotics and parametric representation of the solutions. This is followed by a brief look into the implicit function theorem as a tool for analyzing bifurcations. As an example from mechanics, we consider bifurcations in the transverse free vibration problem of an axially compressed beam. peerReviewed
The Australian Sheep-Goat Scale: An Evaluation of Factor Structure and Convergent Validity.
2018
The Australian Sheep-Goat Scale (ASGS) is a commonly used measure of belief in the paranormal. The scale contains items that index extrasensory perception (ESP), psychokinesis (PK), and life after death (LAD). Although, research employs the ASGS as both a general (unidimensional) and factorial (multidimensional) measure, few studies have examined the appropriateness of these solutions. Accordingly, the present paper tested the psychometric integrity of the ASGS via two studies. Study 1 assessed ASGS factorial structure using confirmatory factor analysis. To achieve this, merging of ASGS data from previously published studies and ongoing work created a heterogeneous sample of 1,601 responses…
KERNEL ESTIMATION OF THE TRANSITION DENSITY IN BIFURCATING MARKOV CHAINS
2023
We study the kernel estimator of the transition density of bifurcating Markov chains. Under some ergodic and regularity properties, we prove that this estimator is consistent and asymptotically normal. Next, in the numerical studies, we propose two data-driven methods to choose the bandwidth parameters. These methods are based on the so-called two bandwidths approach.
Plazmas vienādojuma analīze
2017
Darbā tiek apskatīta trīs dimensiju autonomu parasto diferenciālvienādojumu sistēmu, kas modelē plazmas dinamiku. Īsi aprakstīts tās izvedums, tās galvenās īpašības un, izmantojot skaitliskas un kvalitatīvas metodes, tiek pētīta stacionāro punktu lokālā un globālā stabilitāte, kā arī bifurkācijas, kas rodas pie konkrētiem parametriem. Pētījumā izmantota Ļapunova tipa funkcija un centra varietātes teorēma.
Ectopia ureterale bilaterale in distretto singolo in paziente con sindrome da regressione caudale
2008
Models of the population playing the Rock-Paper-Scissors game
2018
We consider discrete dynamical systems coming from the models of evolution of populations playing rock - paper - scissors game . Asymptotic behaviour of trajectories of these systems is described, occurrence of the Neimark-Sacker bifurcation and nonexistence of time averages are proved.
Central limit theorem for bifurcating Markov chains under L 2 -ergodic conditions
2021
Bifurcating Markov chains (BMC) are Markov chains indexed by a full binary tree representing the evolution of a trait along a population where each individual has two children. We provide a central limit theorem for additive functionals of BMC under L 2-ergodic conditions with three different regimes. This completes the pointwise approach developed in a previous work. As application, we study the elementary case of symmetric bifurcating autoregressive process, which justify the non-trivial hypothesis considered on the kernel transition of the BMC. We illustrate in this example the phase transition observed in the fluctuations.
Un témoignage de gestes funéraires antiques à Bonneuil-en-France (Val-d’Oise)
2022
Eine Suchschnittprospektion bei Bonneuil-en-France (Val-d’Oise), hat eine stark holzkohlehaltige Schicht zum Vorschein gebracht, die reich an verbrannten oder durch Feuereinwirkung beeinträchtigten archäologischem Fundgut war. Dieses kann in die zweite Hälfte des 1. oder an den Beginn des 2. Jh. n. Chr. datiert werden. Die archäologische Fundstelle, die sich im Talboden am Zusammenfluss von Crould und Morée befindet, gehört zu einer seit der späten Hallstattzeit genutzten Gräberlandschaft. Mehrere Argumente sprechen dafür, dass es sich hier um eine Schüttung von Überresten einer Brandbestattung handelt, bei der durch ein Auslesen der Leichenbrandreste nur wenige menschliche Knochen erhalten…
Geometric and morphologic evolution of normal fault planes and traces from 2D to 4D data
2003
Abstract The detailed 3D geometry of normal fault planes is described and analysed using datasets from outcrop studies (2D), seismic surveys (3D) and analogue models (4D). Different geometric configurations of simple isolated normal faults are studied by reference to processes of normal fault propagation. When a normal fault propagates without interacting with other fault zones, the entire border of the principal plane displays characteristic connected secondary structures. These secondary structures cause bifurcations of the principal fault terminations. The along-strike terminations of the principal plane display typical bifurcation configurations (‘ear geometry‘). The orientation of the …