We discuss the electromagnetic energy-momentum distribution and the mechanical forces of the electromagnetic field in material media. There is a long-standing controversy on these notions. The Minkowski and the Abraham energy-momentum tensors are the most well-known ones. We propose a solution of this problem which appears to be natural and self-consistent from both a theoretical and an experim...

It is easy for a theorist to talk about expectations for particle reactions at higher energies. He knows the answer: he will be wrong. Nevertheless, he is derelict in his duty if he doesn't try to guess. These days the word tTpredictionll is often meant to be the explanation of last year's experiments. We should strive for more, lest it be said that the science of high-energy physics is more ba...

Ž . Yagi arrays consisting of closely spaced metal rods spacings2 mm, heights14 mm were investigated as guiding structures for Ž . electromagnetic energy in the microwave regime at 8 GHz ls37 mm both by experiment and simulation. Information transport is possible at a group velocity of 0.6c. Ninety percent of the electromagnetic energy is confined within a distance of 0.05l from the guiding str...

Sir In reference to the article on teaching trauma management in the accident and emergency department (Williams et al., 1991), we are concerned that it may perpetuate the myth that junior staff can and indeed should continue to manage critically injured patients. Many studies have shown that preventable trauma deaths can be reduced from 20-30% to less than 5% with appropriate organizational an...

Classical relativistic field theory is used as a basis for a general discussion of the problem of splitting up the total energy-momentum tensor ofa system into contributions from its component subsystems. Both the Minkowski and Abraham forms (including electrostriction) arise naturally in alternative split-up procedures applied to a nondispersive dielectric fluid. The case of an electromagnetic...

It is pointed out that the previous energy-momentum tensors of Minkowski and Abraham for the electromagnetic field in continuous media are based on a covariant formulation which does not reflect a symmetry inherent to the system. Instead, taking into account the intrinsic invariance under Lorentz transformations involving the reduced speed of light in such a medium, a compact and fully consiste...

Therapy using pulsed electromagnetic energy is now used widely in the UK and many claims are made regarding its clinical effectiveness. The technique developed about 40 years ago from that of continuous short-wave diathermy, to which it is similar in many respects. There are, however, certain important differences between these therapies that influence significantly their clinical application. ...

The problem of the electromagnetic energy-momentum tensor is among the oldest and the most controversial in macroscopic electrodynamics. In the center of the issue is a dispute about the Minkowski and the Abraham tensors for moving media. An overview of the current situation is presented. After putting the discussion into a general Lagrange-Noether framework, the Minkowski tensor is recovered a...

An exact charged axially symmetric solution of the coupled gravitational and electromagnetic fields in the teleparallel equivalent of Einstein theory is derived. It is characterized by three parameters " the gravitational mass M, the charge parameter Q and the rotation parameter a " and its associated metric gives Kerr-Newman spacetime. The parallel vector field and the electromagnetic vector p...

Life on Earth has formed and evolved under exposure to electromagnetic radiation (EMR) of the Sun, which is the most potent natural source of electromagnetic waves. Besides the Sun, electromagnetic oscillations form during lightning strikes. Also, there is geomagnetic background of our planet. Artificial electromagnetic radiation is produced by different electrical equipment, electric motors, r...