Models of the geomagnetic field rely on magnetic data high spatial and temporal resolution. The from low-Earth orbit satellites dedicated survey missions such as CHAMP Swarm play a key role in construction models. Unfortunately, there are no after end 2010 before launch late 2013. This limits our ability to recover signals timescales 3 years less during this gap period. platform magnetometers c...

The rate of secular variation occasionally undergoes a sudden, sharp change, called a geomagnetic jerk. Such jerks have been detected in geomagnetic time series, centered—over the last four decades—around 1971, 1980, 1991, and 1999; others have been inferred from historical records. The geomagnetic jerks represent a reorganization of the secular variation, implying an internal origin, as establ...

[1] The Potsdam Magnetic Model of the Earth (POMME) is a geomagnetic field model providing an estimate of the Earth’s core, crustal, magnetospheric, and induced magnetic fields. The internal field is represented to spherical harmonic (SH) degree 90, while the secular variation and acceleration are given to SH degree 16. Static and time-varying magnetospheric fields are parameterized in Geocentr...

Abstract The paper presents research of the evolution resolution capabilities and approximation accuracy last decade global geopotential models based on space gravimetric measurements CHAMP, GRACE GOCE missions using their spectral characteristics. comparison between model data with point gravity anomalies quasigeoid heights for territory Novosibirsk region is shown. Based results conclusion wa...

2.2. La Maîtrise universitaire en sciences de l’éducation Formation des adultes vise essentiellement à développer chez tous les étudiants une double capacité d’analyse et d’intervention dans le champ de la formation des adultes. Le programme prend en compte la diversité qui caractérise ce champ de pratiques sociales ainsi que les métiers y afférant. Il s’appuie à cette fin sur la transmission d...

We consider the three-dimensional Schrödinger operator with constant magnetic field and bounded random electric potential. We investigate the asymptotic behaviour of the integrated density of states for this operator as the norm of the magnetic field tends to infinity. Résumé On considère l’opérateur de Schrödinger tridimensionnel avec un champ magnétique constant et un potentiel électrique alé...

In the classical approach to elasticity problems, the components of the displacement field are the primary unknowns. In an “intrinsic” approach, new unknowns with more physical or geometrical meanings, such as a strain tensor field or a rotation field for instance, are instead taken as the primary unknowns. We survey here recent progress about the mathematical analysis of such methods applied t...

Dynamical hysteresis is a phenomenon which arises in ferromagnetic systems below the critical temperature as a response to adiabatic variations of the external magnetic field. We study the problem in the context of the mean-field Ising model with Glauber dynamics, proving that for frequencies of the magnetic field oscillations of order N−2/3, N the size of the system, the “critical” hysteresis ...