We study dynamics of a scalar field in the near-horizon region described by a static Klein-Gordon operator which is the Hamiltonian of the system. The explicite construction of a time operator near-horizon is given and its self-adjointness discussed. ⋆ Expanded version of a poster presented at the 5 European Advanced Study Conference in Ancient Olympia, Greece, May 2004. Preprint submitted to E...

This paper deals with some critical issues concerning the concept of sustainable environmental and cultural-economie development. It proposes a new methodology for the evaluation of such a development. Since the concept of sustainable development has become the corner stone of environmental-ecological economics, the present study aims to present both a conceptual and operational basis for susta...

Catalog Description: An introduction to the political, social, cultural, and economic events that distinguished Western Civilization from its earliest roots to the Thirty Years’ War (1648). Major topics include Ancient Near Eastern Civilizations, Greece and Rome, the Middle Ages, and the Renaissance and Reformation. Emphasis is placed on close readings of primary works, including literary and v...

recovering a part of the lost identity of iranian language and culture, the abbasid period is considered to have played an important role in persian language and history. the nationalist movement came to its maximum power in this period. the nationalists tried to prove the iranian talent the ancient persian civilization through a direct conflict by sword or pen. although both politics faced a s...

Around 700 BCE, a new military formation called the phalanx was established in ancient Greece: a tight column of heavy infantry carrying long spears, or pikes, used in a single prong of attack. Later, in the battle of Marathon described by Herodotus, the Greeks learned the advantages of multipronged attacks, a strategy still used in modern warfare. Is the immune system similar in its approach t...

A pneumothorax is defined as the presence of air between visceral and parietal pleura that leads to lung collapse. The term was used in the doctoral thesis of the French physician Itard in 1803, although the presence of an abnormal collection of air and fluid within the chest might have been inferred as early as the fifth century BC by physicians in ancient Greece who practiced the so-called Hi...

The Pyrrhonic Sceptics in ancient Greece employed a useful catchword, epoche ('suspension of judgment'), in philosophic argument.' The expression serves admirably to summarise the current state of knowledge concerning the unique retinopathy that affects prematurely born infants. There are renewed, intense debates about pathophysiological mechanisms that may lead to retinopathy of prematurity, a...

Submit Manuscript | http://medcraveonline.com of muscular adaptations presented by athletes from ancient Greece to modern times. Nowadays, muscle mass is indicated as one of the most essential elements in the organic system, once this demonstrated capacity to act as an active endocrine organ, secreting signaling molecules (i.e., myokines), which may alter the function of several systems, such a...