lakish dialect in darrehshahr belongs to kurdish language (southern kurdish) and is the common dialect of people who live in darrehshehr town of ilam county that is situated in the west part of iran which is highly changing under the influence of standard persian. the present article surveys linguistic relativity with the emphasis on kinship words of the lakish dialect in darrehshahr. firstly, ...

Deformed Special Relativity is usually presented as a deformation of Special Relativity accommodating a new universal constant, the Planck mass, while respecting the relativity principle. In order to avoid some fundamental problems (e.g. soccer ball problem), we argue that we should switch point of view and consider instead the Newton constant G as the universal constant.

Several factors make special relativity initially difficult to understand. One factor is the strongly counterintuitive nature of some of the important results, especially the relativity of simultaneity, time dilation, and length contraction. Another factor is that special relativity is usually taught, both in the classroom and textbooks, differently from other areas of physics in the undergradu...

The quantum theory of General Relativity at low energy exists and is of the form called ”effective field theory”. In this talk I describe the ideas of effective field theory and its application to General Relativity. Invited plenary talk at the Eighth Marcel Grossmann Conference on General Relativity, Jerusalem, June 1997, to be published in the proceedings.

We show a very simple yet rigorous derivation of the invariance of the space-time interval (and hence the whole special relativity) just from the isotropy, homogeneity and a principle of relativity, without the need of the speed of light axiom. This article is intended as a textbook explanation of the special relativity.

We study relativity theory as a theory in the sense of mathematical logic. We use first-order logic (FOL) as a framework to do so. We aim at an “analysis of the logical structure of relativity theories”. First we build up (the kinematics of) special relativity in FOL, then analyze it, and then we experiment with generalizations in the direction of general relativity. The present paper gives sam...

The invariance of the speed of light in all inertial frames is shown to be an inevitable consequence of the relativity principle of special relativity contrary to the view held by Hsu and Hsu in taiji relativity where the speed of light is no longer a universal constant.The present approach is not only new but also much simpler than the existing approaches .

Though Einstein and other physicists recognized the importance of an observer being at rest in an inertial reference frame for the special theory of relativity, the supporting psychological structures were not discussed much by physicists. On the other hand, Rock wrote of the factors involved in the perception of motion, including oneÕs own motion. Rock thus came to discuss issues of significan...

Einstein offered the principle of general covariance as the fundamental physical principle of his general theory of relativity and as responsible for extending the principle of relativity to accelerated motion. This view was disputed almost immediately with the counter-claim that the principle was no relativity principle and was physically vacuous. The disagreement persists today. This article ...