منابع مشابه
A Quick Look At
State Machine Tools For more than 15 years, abstract state machines have been studied, practiced, and applied in modeling and specification of systems to bridge the gap between formal and pragmatic approaches. ASMs have become a well-known technique and assumed a major role in providing a solid and flexible mathematical framework for specification and modeling of virtually all kinds of discrete...
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Renormalons as a pure theoretical construct are known since 1977 [1]. The first attempts to develop a renormalon-based phenomenology are more recent [2,3]. Nowadays it is a fast developing field and a concise review is obviously beyond the scope of the present contribution. Instead, this paper is a compromise between an original paper and a mini-review. Namely we try to put the topics discussed...
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Ross A. Beyer, NASA Ames Research Center, MS 245-3, Moffett Field, CA, USA ([email protected]) Ganges Mensa is a large mesa-like structure located near 311 E, 7.5 S on Mars within the Ganges Chasma. The slopes and surfaces of Ganges Mensa display a variety of morphologies, indicating that units of variable lithology constitute the stratigraphic stack of the mensa as observed by many previous ...
متن کاملA Quick Glance at Quantum Cryptography
The recent application of the principles of quantum mechanics to cryptography has led to a remarkable new dimension in secret communication. As a result of these new developments, it is now possible to construct cryptographic communication systems which detect unauthorized eavesdropping should it occur, and which give a guarantee of no eavesdropping should it not occur.
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Lipids are a group of naturally occurring compounds and hydrophobic or amphiphilic molecules that form structures such as vesicles, liposomes or membranes in an aqueous environment. They are a large and diverse group of organic macromolecules; hence, it is always difficult for scientists to provide a specific definition for the word “lipid”. Therefore, due to the absence of a widely-accepted de...
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ژورنال
عنوان ژورنال: Nature
سال: 2007
ISSN: 0028-0836,1476-4687
DOI: 10.1038/450360a