1,068 research outputs found
Industrial-Strength Documentation for ACL2
The ACL2 theorem prover is a complex system. Its libraries are vast.
Industrial verification efforts may extend this base with hundreds of thousands
of lines of additional modeling tools, specifications, and proof scripts. High
quality documentation is vital for teams that are working together on projects
of this scale. We have developed XDOC, a flexible, scalable documentation tool
for ACL2 that can incorporate the documentation for ACL2 itself, the Community
Books, and an organization's internal formal verification projects, and which
has many features that help to keep the resulting manuals up to date. Using
this tool, we have produced a comprehensive, publicly available ACL2+Books
Manual that brings better documentation to all ACL2 users. We have also
developed an extended manual for use within Centaur Technology that extends the
public manual to cover Centaur's internal books. We expect that other
organizations using ACL2 will wish to develop similarly extended manuals.Comment: In Proceedings ACL2 2014, arXiv:1406.123
Improvements in turfgrass color and density resulting from comprehensive soil diagnostics
There are roughly 220 golf courses in Arkansas, and as many as 50% of these courses were constructed using common bermudagrass fairways. Although resilient, common bermudagrass loses density and quality over time. In this experiment physical and chemical properties of the soil were analyzed to determine the causes of decline in turf quality observed on several fairways of a local golf course. Once a particular fairway was selected for study and preliminary soil sampling conducted, GS+, a geostatistical computer program, was used to map the location of certain chemical deficiencies. A moderate to severe Mg deficiency was detected throughout the fairway. Twelve different fertility treatments were designed to enhance the overall density, texture, and color of the turf. Magnesium sulfate (MgSO4), Primo™ (a plant growth regulator), and Nitron (an organic nitrogen source) all showed significant improvements in turf quality. Extensive and comprehensive soil testing was found to be very beneficial; “hidden” nutrient deficiencies were discovered, which allowed site-specific treatments to be included in the test
Representations of Rank Two Affine Hecke Algebras at Roots of Unity
In this paper, we will fully describe the representations of the
crystallographic rank two affine Hecke algebras using elementary methods, for
all possible values of q. The focus is on the case when q is a root of unity of
small order.Comment: 53 page
Voting for Committees in Agreeable Societies
We examine the following voting situation. A committee of people is to be
formed from a pool of n candidates. The voters selecting the committee will
submit a list of candidates that they would prefer to be on the committee.
We assume that . For a chosen committee, a given voter is said to
be satisfied by that committee if her submitted list of candidates is a
subset of that committee. We examine how popular is the most popular committee.
In particular, we show there is always a committee that satisfies a certain
fraction of the voters and examine what characteristics of the voter data will
increase that fraction.Comment: 11 pages; to appear in Contemporary Mathematic
Connectionist modelling of lexical segmentation and vocabulary acquisition
Adults typically hear sentences in their native language as a sequence of separate words and we might therefeore assume, that words in speech are physically separated in the way that they are perceived. However, when listening to an unfamiliar language we no longer experience sequences of discrete words, but rather hear a continuous stream of speech with boundaries separating individual sentences or utterances. Theories of how adult listeners segment the speech stream into words emphasise the role that knowledge of individual words plays in the segmentation of speech. However, since words can not be learnt until the speech stream can be segmented, it seems unlikely that infants will be able to use word recognition to segment connected speech. For this reason, researchers have proposed a variety of strategies and cues that infants could use to identify word boundaries without being able to recognise the words that these boundaries delimit. This chapter, describes some computational simulations proposing ways in which these cues and strategies for the acquisition of lexical segmentation can be integrated with the infantsÂ’ acquisition of the meanings of words. The simulations reported here describe simple computational mechanisms and knowledge sources that may support these different aspects of language acquisition
Household costs and foster care
Household costs and foster car
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