The macroscopic entropy-area formula for supersymmetric black holes in N=2,4,8 theories is found to be universal: in d=4 it is always given by the square of the largest of the central charges extremized in the moduli space. The proof of universality is based on the fact that the doubling of unbroken supersymmetry near the black hole horizon requires that all central charges other than Z=M vanis...

PURPOSE To evaluate the incidence of central hole-induced ring-shaped dysphotopsia after posterior chamber phakic implantable collamer lens (ICL) with central hole (hole ICL) implantation and to investigate the causes of central hole-induced dysphotopsia. METHODS The clinical study enrolled 29 eyes of 15 consecutive myopic patients implanted with hole ICL. The incidence of ring-shaped dysphot...

Accretion of gas onto a central supermassive black hole is generally accepted to be the source of the emitted energy in active galactic nuclei. The broad emission lines we observe in their optical spectra are probably formed in the wind of an accretion disk at distances of light days to light years from the central black hole. The variable fraction of the emission lines originates at typical di...

Let R be a non-singular m-factorial correlation matrix, i.e. R = D + AA0 with a diagonal matrixD > 0 and a not necessarily de nite matrix AA0 of the minimal possible rank m. From an expression for the general non-central multivariate distribution function with the accompanying correlation matrix R some simpler cases are derived: The p-variate central -distribution with q degrees of freedom is g...

Recent observations indicate that many if not all galaxies host massive central black holes. In this paper we explore the influence of black holes on the lensing properties. We model the lens as an isothermal ellipsoid with a finite core radius plus a central black hole. We show that the presence of the black hole substantially changes the critical curves and caustics. If the black hole mass is...

chronic subdural hematoma (csdh) is a curable entity frequently encountered by neurosurgeons. the present study was conducted to explore expert opinion and common practice in iran. besides, a review of randomized clinical trials in literature was performed. a questionnaire including six questions discussing major aspects of practice on csdh, with multiple choices was designed. a pilot study was...

The ethanol extract of the flowering top of Rosa damascena (Rosaceae) was assessed for neuropharmacological activities in mice using a number of experimental models. It significantly prolonged the pentobarbitone-induced sleeping time in mice, and showed mild to moderate central nervous system depressant activity when assessed by the hole cross and the open field tests in mice model when given...