Titlebook: Unifying Theories of Programming; Third International Shengchao Qin Conference proceedings 2010 The Editor(s) (if applicable) and The Auth

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Generating Denotational Semantics from Algebraic Semantics for Event-Driven System-Level Language,tics for SystemC. A complete set of algebraic laws is explored.The concept of head normal from is applied in supporting the calculation. We also explore the simulation of algebraic laws and head normal form. Based on this, the mechanical derivation of denotational semantics from algebraic semantics is also studied.

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On Modelling User Observations in the UTP,haviour from those observations. To demonstrate how this approach can be applied in practical software development, we propose some alternative refinement relations that offer greater flexibility than classical refinement by utilising knowledge of the observational abilities of users.

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,Halting Still Standing – Programs versus Specifications,ation case. We formalize his argument in UTP-style. This enables us to show that there is a subtle tacit assumption being made about the recursive definition that is used to arrive at the contradiction, namely that the defining equation has a solution. We also explain why this does not affect the pr

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Probabilistic Choice, Reversibility, Loops, and Miracles, termination in the context of a formalism in which a small probability of non-termination can dominate our calculations, proposing a method of limits to avoid this problem. The formal programming constructs described have been implemented in a reversible virtual machine (RVM).

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Ana Cavalcanti,Marie-Claude Gaudelnd a single exchange parameter, and by taking into account the magnetostrictive contribution to the anisotropy. Neutron inelastic scattering measurements of the excitation spectrum show clearly that one of the reasons mean field theory works so well for these materials is that the low lying magnetic

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He Jifenglow­ energy X-rays and the optical and ultraviolet light, hiding the black hole from view at these wavelengths. Until recently, this low-energy absorption presented a major obstacle in observational efforts to map the accretion history of the universe. In 1999 and 2000, the launches of the Chandra a