We present results for two colliding black holes (BHs), with angular momentum, spin, and unequal mass. For the first time, gravitational waveforms are computed for a grazing collision from a full 3D numerical evolution. The collision can be followed through the merger to form a single BH, and through part of the ringdown period of the final BH. The apparent horizon is tracked and studied, and p...

Clinical experience (Browne, Beck, and McCallum, 1949) and rising certification figures by the Pneumoconiosis Medical Board show that there is a pneumoconiosis problem amongst Durham coalminers. Moreover, a study of large films, taken following routine mass miniature radiography (M.M.R.) at eight Durham pits (McCallum, 1952), suggested that at least 3 to 6% of miners at these pits had well mark...

It is shown how to transform the three dimensional BTZ black hole into a four dimensional cylindrical black hole (i.e., black string) in general relativity. This process is identical to the transformation of a point particle in three dimensions into a straight cosmic string in four dimensions. PACS numbers: 04.40.Nr, 04.20.Cv.

Apart from the history and traditions associated with this material, there are several questions that need to be answered. What exactly is Spanish jet? What is its nature? What are the reasons for its special properties and, above all, why has it retained its reputation over so many years as an unalterable material throughout time? Spanish jet is a humic coal, conventionally assimilated to a va...

This study identifies the number of pneumoconiosis patients after eliminating deceased patients between 2003 and 2008 as of January 1st and estimates it for the next five years. From 2003 to 2008, the pneumoconiosis patients were 16,929, 17,224, 17,366, 17,566, 17,542, and 17,546, respectively. The number of pneumoconiosis patients will have increased by 1,014 from 2008 to 18,560 in 2013 after ...

This paper aims to investigate the assumptions under which the binomial option pricing model converges to the Black-Scholes formula. The results are not original; the paper mostly follows the outline of Cox, Ross, and Rubenstein[1]. However, the convergence is treated in greater detail than I have found elsewhere in the literature. This exercise clarifies the assumptions behind the binomial mod...