منابع مشابه
Spas and sensibilities: Darwin at Malvern.
In 1842 when Captain Richard Claridge first described a new form of hydrotherapy to British patients' there were only two places in England that could be visited in order to see what the system offered.2 Ten years later, however, despite scandals about the dramatic death of at least one aristocratic patient,3 there were 24 water-cure establishments in Britain and Ireland, many of which were fam...
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A study of the shocked Coconino sandstone from Meteor Crater, Arizona, was undertaken to examine the role of porosity in the compression of rocks and in the formation of highpressure phases. A suite of shocked Coconino. specimens collected at the crater is divided into five classes, arranged in .order of decreasing quartz content. The amounts of coesite, stishovite (measured by quantitative X-r...
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Snow is a porous disordered medium consisting of air and three water phases: ice, vapor, and liquid. The ice phase consists of an assemblage of grains, ice matrix, initially arranged over a random load bearing skeleton. The quantitative relationship between density and morphological characteristics of different snow microstructures is still an open issue. In this work, a three-dimensional fract...
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Metamorphic malware apply semantics-preserving transformations to their own code in order to foil detection systems based on signature matching. In this paper we consider the problem of automatically extract metamorphic signatures from these malware. We introduce a semantics for self-modifying code, later called phase semantics, and prove its correctness by showing that it is an abstract interp...
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This paper presents a formalisation of the different existing code mutation techniques (polymorphism and metamorphism) by means of formal grammars. While very few theoretical results are known about the detection complexity of viral mutation techniques, we exhaustively address this critical issue by considering the Chomsky classification of formal grammars. This enables us to determine which fa...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1895
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800129875