منابع مشابه
Mobile Objects "Must" Move Safely
Øjeblik is a lexically-scoped, object-based calculus that represents a distribution-free subset of the LAN-based programming language Obliq. The surrogate operation on Øjeblik-objects, which is the abstraction of migration on Obliqobjects, is a combined operation derived from the more primitive operations cloning and aliasing. In short, surrogation on an object turns the object into an alias fo...
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A century ago, malaria was prevalent across much of the inhabited world. With improvements in housing, environmental management, access to antimalarial drugs (quinine, followed by chloroquine), and use of the insecticide DDT, malaria was driven from Europe, North America, and the Union of Soviet Socialist Republics. Building on these early successes, the World Health Organization launched the f...
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The Policing and Reducing Crime Unit (PRC) was formed in 1998 as a result of the merger of the Police Research Group (PRG) and the Research and Statistics Directorate. PRC Unit is now part of the Research, Development and Statistics Directorate of the Home Office. The PRC Unit carries out and commissions research in the social and management sciences on policing and crime reduction, broadening ...
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ژورنال
عنوان ژورنال: Nature
سال: 1973
ISSN: 0028-0836,1476-4687
DOI: 10.1038/246243b0