We use microlocal arguments to suggest that Lorentz symmetry breaking must occur in a reasonably behaved tachyonic quantum field theory that permits renormalizability. In view of this, we present a scalar tachyonic quantum field model with manifestly broken Lorentz symmetry and without exponentially growing/decaying modes. A notion of causality, in which anti-telephones are excluded, and which ...

Making Iranian Schools Smart: From Policy to Practice E. Talaa’ee, Ph.D. N. Ansaari M. Pahlavaan Z. Abootaalebi To assess both the essence and ways of operationalization of a recently adopted policy by the MOE with the aim of making Iranian schools smart, four such schools were purposefully selected, observed, and questioned. The collected data have been analyzed using th...

In the very last published article of his long and distinguished career, the eminent historian of computing Michael Mahoney asked a simple but profound question: “What makes the history of soŸware hard?’’ In his characteristically playful style, Mike was engaging both with an issue of central importance to historians – namely, how can we begin to come to grips with the formidable challenges of ...

The various quantum Hall effects are among the most remarkable many-body phenomena discovered in the second half of the twentieth century. 2, 3, 4 The fractional effect has yielded fractional charge, spin and statistics, as well as unprecedented order parameters. There are beautiful connections with a variety of different topological and conformal field theories of interest in nuclear and high ...

Elevated water tanks supported by the reinforced concrete (RC) Staging are classified as inverted pendulum structures. These are considered as structures of high post-earthquake importance and should remain functional after the seismic events. National codes of various countries recommend Force-Based Design (FBD) procedure for water tank staging, which does not ensure nonlinear performance leve...

The increased frequency of sudden cardiac death after earthquakes and bombings has long proposed that emotional distress plays a role in acute coronary syndromes and arrhythmias. Since the 1960s, several controlled, prospective, epidemiological studies have reported emotional distress as a major risk factor for the onset and worsening of coronary heart disease (CHD) [1]. The Interheart study, a...

Recent transport experiments have established that two-dimensional electron systems with high-index partial Landau level filling, ν∗ = ν − [ν], have ground states with broken orientational symmetry. In a mean-field theory, the broken symmetry state consists of electron stripes with local filling factor [ν] + 1, separated by hole stripes with filling factor [ν]. We have recently developed a theo...