Research briefs: Gamma-ray bursts and their possible cosmological implications, Peter Meszaros 12 Current activity and results in laboratory gravity, Riley Newman : : : : : : : : : : : : : 15 Update on representations of quantum gravity, Donald Marolf : : : : : : : : : : : : : : : : 19 Ligo project report: December 1993, Rochus E. Vogt : : : : : : : : : : : : : : : : : : : : : : : : : 23 Dark m...

In order to develop an IT-based RMSS, several determinants should be taken into consideration. In regards to operative forces, certain framework conditions need to be considered, especially when dealing with large-scale damage events to ensure acceptance and effective usage of additional devices. These framework conditions, determined by psychological and legal factors, are closely linked to sp...

A new species of the genus Zonana DeLong & Freytag, 1963 from Peru is described and illustrated: Z. petalacea sp. nov. This species is easily distinguished from other species of the genus by its peculiar aedeagus with a pair of slender ventral processes and a unique flattened petal-shaped dorsal process. A taxonomic key to the now four known species of Zonana is provided. 

The epicardium is a critical tissue that directs several aspects of heart development, particularly via the secretion of soluble factors. This review summarizes recent approaches that implicate the epicardium as the source of mitogenic factors promoting cardiomyocyte proliferation, as the source of instructive signals that direct compact zone organization (morphogenesis), and as the tissue that...

A small fraction of double radio sources show a peculiar and striking hybrid morphology; they have a distinctly FR I structure on one side of the nucleus, and a FR II structure on the other. We argue that the mere existence of these HYMORS is quite incompatible with the theoretical explanations for the Fanaroff–Riley dichotomy that are based upon the nature of the jet plasma, or those invoking ...

The RoboCup simulated soccer league (RoboCupSoccer) is an important and useful tool for multi-agent and machine learning research which provides a distributed, multi-agent environment in which agents have an incomplete and uncertain world view (Kitano et al., 1995; Kitano et al., 1997). The RoboCupSoccer state-space is extremely large, and the agent perception and action cycles in the RoboCupSo...

We present high-resolution VLA observations at 8.4 GHz of the seventeen FRII radio galaxies with 0:15 < z < 0:30 and LAS < 190 arcsec from the sample of Laing, Riley & Longair (1983), together with 5-GHz MERLIN observations of one source. Jets have been discovered in 3C20, 4C14.11, 3C 234 and 3C436, and well imaged for the rst time in a number of other objects; the fraction of objects in the sa...

A method is described of extracting linear features from images. The approach is to construct a series of lower-resolution versions of the original image (a pyramid), and to look for lines in these images. A line in a low-resolution image corresponds to a thicker linear feature in a high-resolution image. The position and extent of this linear feature is calculated from the low-resolution image...

Abstract. The so-called HYbrid MOrphology Radio Sources (HYMORS) are a class of objects that appear to have a mixed Fanaroff-Riley (FR) morphology in a single object; i.e. a HYMORS has an FR I-type lobe on one side of its nucleus and an FR II-type lobe on the other side. Because of this unique feature and given that the origin of the FR morphological dichotomy is still unclear, HYMORS may possi...

The study of mass communications is a broad, multidisciplinary field to which sociology has made major contributions. Some of these contributions have been reviewed in earlier works by Riley & Riley (1959), Larsen (1964), Janowitz (1968), McQuail (1969), Davison & Yu (1974), & Ball-Rokeach (1975), and Wright (1975a). Several chapters in Annual Review of Psychology, although not explicitly socio...