We report here further results from the threedimensional particle-in-cell simulations of the electron-beam driven electron holes. We focus here on (i) the transformation of oscillatory waves driven by the electron-beam instability into electron holes, (ii) the continued evolution and propagation of electron holes after their formation, including merging of electron holes, and (iii) the effects ...

We have developed a new numerical code to study the evolution of distorted, rotating black holes. We discuss the numerical methods and gauge conditions we developed to evolve such spacetimes. The code has been put through a series of tests, and we report on (a) results of comparisons with codes designed to evolve non-rotating holes, (b) evolution of Kerr spacetimes for which analytic properties...

AIMS The reliability of scanning laser ophthalmoscope (SLO) microperimetry in differentiating full thickness macular holes from macular pseudoholes and impending macular holes was evaluated. METHODS 106 eyes with the clinical diagnosis of full thickness macular holes, macular pseudoholes, and impending (stage 1) macular holes were examined for the presence of deep or relative scotoma using SL...

Miniplates have been used during the last decade to facilitate stability between bony fragments in the maxillofacial region and are currently the preferred surgical method for the fixation of fractures and osteotomies. The aim of this study was to evaluate and compare the biomechanical behaviors of six different types of miniplates used to reconstruct mandibular body fractures: Group 1 (straigh...

X iv :0 70 5. 25 72 v1 [ ph ys ic s. ge nph ] 1 7 M ay 2 00 7 SUPERSYMMETRIC YANG MILLS FIELDS AND BLACK HOLES: IN TEN DIMENSIONAL UNIFIED FIELD THEORY AJAY PATWARDHAN Physics department, St Xavier’s college, Mumbai, India Visitor, Institute of Mathematical Sciences, Chennai, India ABSTRACT The ten dimensional unified field theory has a 4 dimensional Riemannian space time and six dimensional Ca...

The extreme Reissner-Nordström black holes have zero surface gravity. However, a semi-classical analysis seems to be ill-definite for these objects and apparently no notion of temperature exists for them. It is argued here that these properties are shared for all kind of black holes whose surface gravity is zero. Two examples are worked out explicitely: the scalar-tensor cold black holes and ex...