The tragic events of 9/11 and the concerns about the potential for a terrorist or hostile state attack with weapons of mass destruction have led to an increased emphasis on risk analysis for homeland security. Uncertain hazards (natural and engineering) have been successfully analyzed using probabilistic risk analysis (PRA). Unlike uncertain hazards, terrorists and hostile states are intelligen...

Enteropathogenic Escherichia coli delivers a subset of effectors into host cells via a type III secretion system, and this step is required for the progression of disease. Here, we show that the type III effectors, EspG and its homolog Orf3, trigger actin stress fiber formation and the destruction of the microtubule networks beneath adherent bacteria. Both effectors were shown to possess the ab...

When correlating brain size and structure with behavioural and environmental characteristics, a range of techniques can be utilised. This study used gobiid fishes to quantitatively compare brain volumes obtained via three different methods; these included the commonly used techniques of histology and approximating brain volume to an idealised ellipsoid, and the recently established technique of...

Based on the microseismic monitoring data of underground cavern Shuangjiangkou Hydropower Station, internal relationship between rockburst and events is analyzed occurrence mechanism slip-type in Station through change b value to warn risk level rockburst. The results show that are closely related excavation activities, reflects level. smaller is, more large magnitude greater possibility is. wa...

We have investigated U-Pb discordance and oxygen isotopic composition of zircon using high– spatial resolution !O measurement by ion microprobe. !O in both concordant and discordant zircon grains provides an indication of the relationship between fluid interaction and discordance. Our results suggest that three characteristics of zircon are interrelated: (1) U-Pb systematics and concomitant age...

NATO’s strategic transformation will have an important impact on the Alliance’s approach to the Mediterranean and on the future of its Mediterranean Initiative. During the Cold War, NATO’s strategy, doctrine, and military capabilities were oriented toward deterring a military threat from the Soviet Union. Today, the threats and challenges are more diverse—and more indirect. They range from ethn...

Once segmentation of 3D surface data of a rock pile has been performed, the next task is to determine the visibility of the surface rocks. A region boundary-following algorithm that accommodates irregularly spaced 3D coordinate data is presented for determining this visibility. We examine 3D surface segmentations of laboratory rock piles and determine which regions in the segmentation correspon...

Modern drilling machines designed for the destruction of rocks have a diverse structure, various performance characteristics and in most cases well-defined limited scope application. The common high strength are impact machines. One effective ways to increase productivity such is find rational geometric parameters colliding elements. article proposes substantiates methodology studying shock sys...