92 citations · 359 across the 12 of their papers we have counts for
12 papers
Axiomatics of classical electrodynamics and its relation to gauge field theory
Frank Gronwald, Friedrich W. Hehl, Jürgen Nitsch
We give a concise axiomatic introduction into the fundamental structure of classical electrodynamics: It is based on electric charge conservation, the Lorentz force, magnetic flux…
Some aspects on the observation of the gravitomagnetic clock effect
H. Lichtenegger, W. Hausleitner, F. Gronwald +1
As a consequence of gravitomagnetism, which is a fundamental weak-field prediction of general relativity and ubiquitous in gravitational phenomena, clocks show a difference in thei…
Gravitomagnetism and the Clock Effect
B. Mashhoon, F. Gronwald, H. I. M. Lichtenegger
The main theoretical aspects of gravitomagnetism are reviewed. It is shown that the gravitomagnetic precession of a gyroscope is intimately connected with the special temporal stru…
On detecting the gravitomagnetic field of the earth by means of orbiting clocks
H. I. M. Lichtenegger, F. Gronwald, B. Mashhoon
Based on the recent finding that the difference in proper time of two clocks in prograde and retrograde equatorial orbits about the Earth is of the order 10^{-7}s per revolution, t…
A small guide to variations in teleparallel gauge theories of gravity and the Kaniel-Itin model
Uwe Muench, Frank Gronwald, Friedrich W. Hehl
Recently Kaniel & Itin proposed a gravitational model with the wave type equation [\square+λ(x)]\vartheta^α=0 as vacuum field equation, where \vartheta^αdenotes the coframe of spac…
Volume elements of spacetime and a quartet of scalar fields
Frank Gronwald, Uwe Muench, Alfredo Macías +1
Starting with a `bare' 4-dimensional differential manifold as a model of spacetime, we discuss the options one has for defining a volume element which can be used for physical theo…