It has been recently discovered by Bell, Heinle and Levandovskyy that a large class of algebras, including the ubiquitous G-algebras, are finite factorization domains (FFD for short). Utilizing this result, we contribute an algorithm to find all distinct factorizations of a given element f ∈ G, where G is any G-algebra, with minor assumptions on the underlying field. Moreover, the property of b...

Step blasting is an important part of open-pit mining, which accompanied by hazards such as large blocks, flying stone splashing, noises, and dust during the process. In order to reduce harm caused blasting, this paper uses impact dynamics rock explain deformation damage motion law detonation material blocked gun hole. By simulating in hole, failure characteristics hole are revealed. paper, geo...

X-ray reflection spectroscopy is a powerful technique for probing the nature of gravity around black holes in so-called strong-field regime. One popular approach to look at theory-agnostic deviations away from Kerr solution, which only astrophysically relevant hole solution within classical general relativity, order verify whether astrophysical are described by metric. We have recently extended...

The drilling is well known as one of the most common hole making processes in the industry.Due to close tolerance requirement for drilled holes in the most of work pieces, onlinecontrolling of the diameter of drilled holes seems to be necessary. In the current work, an onlinedimensional controlling system was developed for drilling process. Doing this, drilling processwas executed in different ...

An exact heterotic string theory on an AdS2 × S2 background is found as deformation of an SL (2,R) × SU (2) wzw model.† ∗Unité mixte du CNRS et de l’École Polytechnique, UMR 7644. †Based on a talk given at NATO Advanced Study Institute and EC Summer School on String Theory: from Gauge Interactions to Cosmology, Cargese, Corsica, France, 7 Jun 19 Jun 2004. 1. Intro Anti de Sitter in three dimens...