The axion [1{4] is the Nambu-Goldstone boson associated with the Peccei-Quinn symmetry breaking which was invented as the most natural solution to the strong CP problem [5] of QCD. The Peccei-Quinn symmetry breaking scale Fa is stringently constrained by the consideration of accelerator experiments, stellar cooling and cosmology. The allowed range of Fa=N ( axion window ) is between 10GeV and 1...

Two classes of metrics obtained from non-Riemannian gravitational collapse are presented.The first is the Taub planar symmetric exact solutions of Einstein-Cartan field equations of gravity describing torsion walls which are obtained from gravitational collapse of time dependent perturbation of Riemannian Taub symmetric solutions of General Relativity.The second is a modification of the Vilenki...

Some may recall, or have read about, those heady days when history allegedly ended, as the Berlin Wall collapsed. When the wall came down it seemed to may observers as if, with the end of communism – at least in Europe – the only threat to existing democratic political power was vanquished. Liberal, plural democracy, the open society and open organizations seemed to stretch as a vista into a fu...

OBJECTIVE Our objective was to assess potential causative factors of stent-graft collapse after thoracic endovascular aortic repair. METHODS We retrospectively reviewed clinical data and preoperative and postoperative computed tomographic scans of patients with thoracic stent-graft collapse in 2 French departments of vascular surgery. Aortic arch angulation, length of the lack of device wall ...

This case study of “Virtuelle Mauer/ReConstructing the Wall,” a prize-winning interactive 3D installation on the Berlin Wall, describes an approach using artistic concepts of abstraction and interactive narratology to simplify production and focus on subtle but powerful user interactions with the virtual world. Interactivity is predetermined and invariable, but after two years of exhibitions in...

acute respiratory distress syndrome (ards) is a complex disorder of heterogeneous etiologies characterized by a consistent, recognizable pattern of lung injury and a potentially devastating form of acute inflammatory lung injury with a high short-term mortality rate and significant long-term consequences among survivors. recently, the new definition of ards has been published, and this definiti...

This paper criticizes Hirschman's interpretation of •gthe events of the autumn of 1989•h that is representative of the popular interpretation. According to the popular interpretation, the process started just by change of the Hungarian west border in May, 1989. Hirschman (1995) has written the same. Using only this framework he studied why and how the Exodus and the reform movement tied up in E...

Velocity measurements are presented for a vertically shaken granular layer. For frequencies around 110 Hz and accelerations larger than gravity, the layer develops a convective motion in the form of one or more rolls. The velocity of the grains near the wall has been measured. It grows linearly with the acceleration, then the growth rate slows down. A rescaling with the amplitude of the wall ve...

A revised procedure for the design of steel plate shear walls is proposed. In this procedure, the thickness of the infill plate is found using equations that are derived from plastic analysis of the strip model, which is widely accepted for the representation of steel plate shear walls. Equations are derived from a basic steel plate shear wall configuration but are shown to be conservative for ...