The growing need for communication, visualization and organization technologies in the field of e-learning environments has led to the application of virtual reality and the use of collaborativeâ€¦ (More)

Magnetic reconnection can be interpreted as a process in which the electromagnetic eld is frozen into a four-velocity eld in Minkowski space. For reconnec-tion to occur the four-velocity eld has toâ€¦ (More)

Newly emerging magnetic flux can show a complicated linked or interwoven topology of the magnetic field. The complexity of this linkage or knottedness of magnetic flux is related to the free energyâ€¦ (More)

BACKGROUND
Nitrate is known to be a precursor in the endogenous formation of N-nitroso compounds which are thought to be associated with the development of brain tumours.
METHODS
We conducted aâ€¦ (More)

Magnetohydrodynamic dynamos operating in stellar interiors produce the diverse range of magnetic activity observed in solar-like stars. Sophisticated dynamo models including realistic physics ofâ€¦ (More)

An expression for a third-order link integral of three magnetic fields is presented. It is a topological invariant and therefore an invariant of ideal magnetohydrodynamics. The integral generalizesâ€¦ (More)

The final state of turbulent magnetic relaxation in a reversed field pinch is well explained by Taylor's hypothesis. However, recent resistive-magnetohydrodynamic simulations of the relaxation ofâ€¦ (More)

The cross-helicity integral is known in fluid dynamics and plasma physics as a topological invariant which measures the mutual linkage of two divergence-free vector fields, e.g., magnetic fields, onâ€¦ (More)

Magnetic reconnection is simulated with the help of covariant transport equations for the electromagnetic eld. They include an induction equation for the magnetic as well as the electric eld. Theâ€¦ (More)