Notable Astronomers of Past Ages. II-Ptolemy
نویسندگان
چکیده
منابع مشابه
Modeling Distributed Hybrid Systems in Ptolemy II
Ptolemy II [2] supports the modeling of heterogeneous systems by using a hierarchical component-based architecture and well-defined models of computation. The basic component in Ptolemy II is called an actor. Actors have por t s , which are their communication interface to other actors. An aggregation of actors and their connections is called a comp o s i t e ac tor . A composi te actor can hav...
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Networked sensors are becoming an increasingly important field of research as power and size requirements grow smaller and it becomes easier to embed thousands or millions of these devices in our environment. However, there is currently very little programming support for these and other event-based systems. In this paper, we focus on TinyOS, an event-based operating system for Smart Dust netwo...
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TinyOS is a component-based operating system designed for wireless embedded sensor networks. TOSSIM provides discrete event simulation of homogeneous TinyOS programs at the interrupt level. This paper presents PtinyOS, an integrated development environment built in Ptolemy II for developing and simulating heterogeneous TinyOS programs. PtinyOS will allow application developers to easily transit...
متن کاملNew Width Inference Algorithm for Ptolemy II
In Ptolemy II, the widths of the relations between actors have an important role in specifying the semantics of a model. In some situations, however, explicit relation widths break the modularity of a model. In these cases, we would like to infer the widths of relations from the widths of neighboring relations. There is an existing implementation in Ptolemy, but it has some severe limitations. ...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1927
ISSN: 0004-6280,1538-3873
DOI: 10.1086/123689