Verification of high-level transformations with inductive refinement types

International audienceHigh-level transformation languages like Rascal include expressive features for manipulating large abstract syntax trees: first-class traversals, expressive pattern matching, backtrack-ing and generalized iterators. We present the design and implementation of an abstract interpretation tool, Rabit, for verifying inductive type and shape properties for transformations written in such languages. We describe how to perform abstract interpretation based on operational semantics, specifically focusing on the challenges arising when analyzing the expressive traversals and pattern matching. Finally, we evaluate Rabit on a series of transformations (normaliza-tion, desugaring, refactoring, code generators, type inference, etc.) showing that we can effectively verify stated properties. CCS Concepts • Software and its engineering → General programming languages; • Social and professional topics → History of programming languages

Best Practices of Honor Societies

Academic honor societies are widely available within university communities. These student organizations can fill valuable roles within engineering departments. The inception of engineering-related honor societies followed the establishment of engineering education within American universities. Honor societies with their student focus grew as complementary organizations to the professional societies for engineering disciplines. The national or international structure of honor societies generally provides considerable resources for professional education, leadership training, and service activity. For departments, an honor society chapter can provide engagement with students, alumni, community, etc. However, the existence of an honor society chapter at an institution does not necessarily mean that the chapter is effectively serving the host department(s) and its engineering students. This paper describes commonalities among engineering honor societies, the possible roles of an honor society within an engineering department, and some best practices for effective honor society chapters. Specific examples from the operation of IEEE-Eta Kappa Nu (IEEE-HKN), the honor society of the Institute of Electrical and Electronics Engineers (IEEE), are given.Cockrell School of Engineerin

Particulate emissions from energy systems

General models of aerosol dynamics, originally developed to simulate atmospheric aerosol behavior, have been extended for application to combustion and other high temperature processes. These models are now being used to study the fate of ash vapors in conventional pulverized-coal combustion. Field measurements have shown that the vapors condense preferentially on the surfaces of the smaller ash particles. Previous simplified calculations have suggested that large numbers of very small particles may also be formed by the condensation of these vapors. The new, exact calculations will be used to explore the relative importance of new particle formation and condensation on existing particles, the size distributions of the particles produced under various combustion conditions, and the distribution of chemical composition with respect to particle size

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Requests of Brown by LC Classification: May 2003

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