Sitting in our offices early in the morning of September 11, 2001, we, like many across the world, watched with incredulity the twin terrorist strikes on the World Trade Centre. Riveted to the television screen, we witnessed the beginnings of a nightmare whose images will likely remain with us for a long time. September 11, and the events that followed, changed our assumptions of world terroris...

Rock art is a widespread cultural heritage, representing an immovable element of the material culture created on natural rocky supports. Paintings and petroglyphs can be found within caves rock shelters or in open-air contexts for that reason they are not isolated from processes acting at Earth surface. Consequently, represents sort ecosystem because it part complex multidirectional interplay b...

Since the late 1970s, Libyan leader Colonel Muammar Qadhafi has sought to obtain weapons of mass destruction (WMD), particularly chemical and biological weapons (CBW). By the late 1980s, Libya had developed a rudimentary capability to produce such weapons. Western experts view the pursuit of CBW as a means of bolstering Libya’s military capability, since the country lacks effective conventional...

Uncertainty about behavior: Uncertainty about behavior refers to uncertainty regarding the actions taken by others. Sometimes it is hard to know what other states are doing – in particular, if they are cooperating or defecting. Consider weapons of mass destruction. Whatever a state may say publicly, it is very difficult for others to ascertain whether it is pursuing technologies associated with...

The article presents the results of theoretical studies describing process crack growth during processing rocks in mills. mathematical apparatus theory oscillation round plates is used to determine energy parameters propagation process. An expression found for identifying deformation wall as a result impact. shock pulse acting on are determined. value impact necessary destruction rock has been ...

With changes in mining depth, the dynamic mechanical characteristics of same type rock also change, so that blasting excavation process must be constantly adjusted and optimized to meet requirements safe efficient mining. To study energy evolution law fractal deep marble during destruction process, impact tests under different strain rates were carried out on a sample using three-axis combinati...

The destruction process of the rock by tool impact device occurs with an impulsive load on from recoil reaction side rock, not only in axial, but also transverse direction. A model part is considered, which takes into account and longitudinal oscillations. has form a rod for loading beam constant cross section loading. Transverse oscillations sections are considered independent. When calculatin...

Analyzes that granite AE signal parameters under uniaxial loading by that way of Pearson linear correlation, research that correlation of characterization parameters within that separate group with various characteristics, and analyzes that relationship between each parameter and destruction. This study shows that: impact, events and ringing are mainly used to describe the damage degree of rock...

The large load and poor heat dissipation of moon rock core drilling leads to the difficulty breaking low sampling efficiency. As a new auxiliary method, laser is expected be applied perturbation in lunar drilling. Revealing fracture characteristics mechanism under irradiation an important basis for realizing laser-assisted sampling. Basalt was used as simulated sample, its mechanical response w...