Recently there is a suggestion about the star RXJ1856.5−3754, being a possible candidate for quark star. While from the estimates of the radiation radius, given by the authors, it does not seem to fit with any of the known models for such stars, the mass radius diagram admits the possibility of this being a quark star of mass M ⊙ < M < 1.4M ⊙ , provided the radius mentioned is the actual radius...

This paper describes the design of the “Spotter” unmanned aerial vehicle, developed by the University of Southampton as part of the 2SEAS-3i European Interreg project. Spotter is a twin engine, 4m wing span, fixed-wing aircraft which has been designed to perform long-endurance, all-weather patrol missions in coastal and maritime environments. Reliability and safety have been among the strongest...

Slow-moving (v ∼ 15 km/s) ‘dark matter particles’ have allegedly been discovered in a recent experiment. We explore the possibility that these slow moving dark matter particles are small mirror matter dust particles originating from our solar system. Ways of further testing our hypothesis, including the possibility of observing these dust particles in cryogenic detectors such as NAUTILUS, are a...

Stephen Jay Gould, remarkable paleontologist and revered popularizer of science, died of cancer on May 20, 2002. With his death, he passed into the history that he loved; a history, as he well knew, whose mills grind exceedingly fine. Those mills have started work on his writings, just as he ruminated memorably over books by Lamarck, Cuvier, Goethe, Geoffrey St. Hilaire, Darwin, Weismann, de Vr...

BACKGROUND Cough is a common symptom for which patients often seek medical advice and consume vast amounts of drugs. It is a real challenge for both the physician and the clinical researcher to evaluate a cough's clinical importance and its precise response to treatment. OBJECTIVES This systematic literature review has the following objectives: first, to make an inventory of the validated too...