Robert N. C. Pfeifer

Learn More
Almost 100 years ago, two different expressions were proposed for the energy-momentum tensor of an electromagnetic wave in a dielectric. Minkowski's tensor predicted an increase in the linear momentum of the wave on entering a dielectric medium, whereas Abraham's tensor predicted its decrease. Theoretical arguments were advanced in favor of both sides, and(More)
Almost a hundred years ago, two different expressions were proposed for the energy–momentum tensor of an electromagnetic wave in a dielectric. Minkowski's tensor predicted an increase in the linear momentum of the wave on entering a dielectric medium, whereas Abraham's tensor predicted its decrease. Theoretical arguments were advanced in favour of both(More)
The Ring Ouzel (Turdus torquatus) has an arctic–alpine distribution, with small populations also occurring at the higher altitudes of the low mountain ranges north of the Alps. The populations of the Alps and mountain ranges are classified as the subspecies T. torquatus alpestris, and those of the northern populations as T. torquatus torquatus. Since birds(More)
With the advent in scientific language the terms «negative refraction coefficient» or «negative refraction» as well as related terms, researchers put some questions, which generally speaking have a much broader significance than the above words. The notion of «negative refraction coefficient» was shown for the first time probably in our early work 1.(More)
In this paper, a Cognitive Science theory of motivational cognitive and emotional processes is applied to clinical psychology. We are demonstrating that a dynamic view of psychiatric disturbances and diagnoses can be derived from this theory (part I). In part II it is shown that-as a by-product-the theory allows to classify from a neutral "meta-perspective"(More)
There are no generally accepted classification schemes for motivational and emotional disorders. One of the reasons is the difficulty in isolating motivational and emotional disorders from complex behaviors. Therefore, terms which characterize certain behaviors globally, such as clinical syndromes, are preferred in the clinical literature. Another, related(More)
  • 1