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Observations by the MACHO collaboration suggest that a significant proportion of the galactic halo dark matter is in the form of compact objects with typical masses M ∼ 0.5M ⊙. One of the current mysteries is the nature and origin of these objects. We suggest that these objects are stars composed of mirror matter. This interpretation provides a plausible explanation for the inferred masses and ...
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...
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...
The Canadian economy entered a recession in the second quarter of 1990, following a period of slowing real growth over the previous year. The recession technically lasted four quarters,1 about average length for postWorld War II recessions in Canada. However, the recovery, which began with a one-quarter growth spurt in the second quarter of 1991, has been anaemic. Real growth over the first sev...
abstract when in administrative law the matter of administrative offences are raised, these offences would have legal nature if they are force able, some of these offences are related to administrative law, where as some other pelts are common in civil or penal law. the current research intends not only to consider the concept and foundation of administrative execution rules but also compares...
in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...
The paper aims at reevaluating a conception of the aesthetic that was developed by Kant and Hegel but that has been widely neglected due to the fact that their positions in aesthetics have been wrongly considered to be antagonistic to one another. The conception states that the aesthetic is a practice of reflecting on other human practices. Kant was the first to articulate this conception, but ...
This paper is an attempt to present some strategies for regeneration of country historical textures that are worth of heritage and are in the center of urban discourse. In this regard cultural regeneration as the basis of theoretical discussion is considered. In this approach, culture is known as the main urban asset. The city of Qazvin with its worth historical context, potential for cultur...
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