We report results from an exploratory analysis examining “last-minute” self-censorship, or content that is filtered after being written, on Facebook. We collected data from 3.9 million users over 17 days and associate self-censorship behavior with features describing users, their social graph, and the interactions between them. Our results indicate that 71% of users exhibited some level of last...

Exact solutions of the Einstein-Maxwell equations that describe moving black holes in a cosmological setting are discussed with the aim of discovering the global structure and testing cosmic censorship. Continuation beyond the horizons present in these solutions is necessary in order to identify the global structure. Therefore the possibilities and methods of analytic extension of geometries ar...

The Ernst spacetime is a solution of the Einstein-Maxwell equations describing two charged black holes accelerating apart in a uniform electric (or magnetic) field. As the field approaches a critical value, the black hole horizon appears to touch the acceleration horizon. We show that weak cosmic censorship cannot be violated by increasing the field past this critical value: The event horizon r...

Semiparametric random censorship (SRC) models (Dikta, 1998), derive their rationale from their ability to gainfully utilize parametric ideas within the random censorship environment. An extension of this approach is developed for Cox regression, producing new estimators of the regression parameter and baseline cumulative hazard function. Under correct parametric specification, the proposed esti...

Censorship in the random censorship model is described by a pro-portionality function (t), where (t) is a function of the survival function S T of the lifetimes, and the survival function S C of the censoring times. An estimator of (t) is proposed and asymptotic properties of the estimator are ascertained. A conndence band for (t) using the bootstrap is derived. We also develop a bootstrap test...

THISSELECTIVE BIBLIOGRAPHY concentrates on the Library Bill of Rights but also deals more broadly with intellectual freedom. The cited items are not intended to be comprehensive but rather a starting point for those interested in further reading on the topic. The title American Library Association Bulletin is used consistently to refer to all variants of the title of the periodical which it rep...

Abstract To what degree are news websites in autocracies resilient to online censorship? I explore this question Egypt, which has begun heavily censor recent years, alongside several other autocracies. Relying on a sample of 145 outlets, systematically how blocking affects traffic outlets and their current statuses. Statistical tests show that blocked Egyptian lost average 54–55 per cent global...