A new theory of the magnetization process in plastically deformed nickel single crystals of single slip orientation is outlined. It is based on the interaction between the (101)180°-domain walls and the three types of primary edge dislocation dipole and multipole arrangements dominating in stage I, in the transition region and in stage II of the stressstrain curve, respectively, i . e . the [12...

We define the stability of a subgroup under a class of maps, and establish the basic properties of this notion. Loosely speaking, we will say that a normal subgroup, or more generally a normal series {An} of a group A, is stable under a class of homomorphisms H if whenever f : A → B lies in H, we have that f(a) ∈ Bn if and only if a ∈ An. This translates to saying that each element of H induces...

We study the dynamics of a ferromagnetic domain wall driven by an external magnetic field through a disordered medium. The avalanchelike motion of the domain walls between pinned configurations produces a noise known as the Barkhausen effect. We discuss experimental results on soft ferromagnetic materials, with reference to the domain structure and the sample geometry, and report Barkhausen noi...

There is a gap in the proof of Lemma VII.4 in [1]. We present an alternative proof of Theorem B (C 1 Ω-stable vector fields satisfy Axiom A) in [1]. The novel and essential part in the proof of the stability and Ω-stability conjectures for flows is the connecting lemma introduced in [1]. A mistake in the proof of the last conjecture was pointed out to me by Toyoshiba [5], who later also provide...

In this paper numerical results are reviewed ([13]) that demonstrate that common second-order operator-splitting methods can exhibit instabilities when integrating the Brusselator equations out to moderate times of about seven periods of oscillation. These instabilities are manifested as high wave number spatial errors. In this paper we further analyze this problem and present a theorem for sta...

„A roma kultúra reprezentációja a tartalomszabályozók, tartalomhordozók körében, valamint ezek fejlesztési lehetőségei” című kutatás során azt vizsgáltuk, hogy közoktatásban környezetismeret, természetismeret és földrajz tanításához választható tankönyvek listáján szereplő tananyaghordozók hazai nemzetiségekről, fókuszáltan cigány, népességről tartalmaznak-e olyan releváns információkat, amelye...

‎semidiscrete finite element approximation of a hyperbolic type‎ ‎integro-differential equation is studied. the model problem is‎ ‎treated as the wave equation which is perturbed with a memory term.‎ ‎stability estimates are obtained for a slightly more general problem.‎ ‎these, based on energy method, are used to prove optimal order‎ ‎a priori error estimates.‎