Andy Gill, Terrance Swift's Practical Aspects of Declarative Languages: 11th PDF

By Andy Gill, Terrance Swift

This publication constitutes the refereed court cases of the eleventh foreign Symposium on useful features of Declarative Languages, PADL 2009, held in Savannah, GA, united states, in January 2009, collocated with POPL 2009, the Symposium on ideas of Programming Languages. The 18 revised complete papers provided including 1 invited speak have been rigorously reviewed and chosen from forty eight submissions. the quantity gains unique paintings emphasizing novel functions and implementation suggestions for all kinds of declarative techniques, together with capabilities, kinfolk, good judgment, and constraints. The papers tackle all present features of declarative programming; they're equipped in topical sections on person interfaces and environments, networks and information, multi-threading and parallelism, databases and massive information units, tabling and optimization, in addition to language extensions and implementation.

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Additional info for Practical Aspects of Declarative Languages: 11th International Symposium, PADL 2009, Savannah, GA, USA, January 19-20, 2009, Proceedings (Lecture Notes ... Programming and Software Engineering)

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A standard strategy in visualization is to first gain an overview of the data, and then descend into lower levels of detail, saving unnecessary computation. – Our volume renderer has a very simple implementation, but one based on nested lists, and could not render the volume at full resolution. 1). So we needed a flexible mechanism for extracting subsets of the data, both by downsampling, and/or by restricting the range of one or more dimensions. Our implementation consisted of three components: – a regular naming scheme for resources (files) that encodes information about the spatial bounds, sampling, and fields; – a high-level planner that, given the specification of a required resource, computes the cheapest plan for generating that resource from the available files; and – a worker program that implements a given plan.

Experience gained in implementing these algorithms is reported in [7]. For addressing the contest tasks, three further techniques were implemented: – slice visualization; – 2D contouring; and – 3D scatterplot. Building on the Stage I work, we were easily able to adapt our infrastructure to process contest datasets, obtaining initial results such as the volume rendering of gas density, and isosurfaces of gas temperature, shown in Figure 2. Fig. 2. Left: gas density as a volume rendering. 5K (blue), 16K (green) and 20K Kelvin (red).

Specifically, we have extended ACL2’s language with modules and produced two translations for modular programs: a compiler to ACL2 executables and a logic translator to ACL2 proof obligations. With the latter, programmers can now reason locally about individual modules. One goal is to empower ACL2 programmers with large code bases to gradually migrate their monolithic program into a modular world. Another goal is to expand Rex Page’s [5] use of this industrial-strength theorem prover in software engineering courses to teach theorem proving in a modular setting.

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