A semantics comparison workbench for a concurrent, asynchronous, distributed programming language

A number of high-level languages and libraries have been proposed that offer novel and simple to use abstractions for concurrent, asynchronous, and distributed programming. The execution models that realise them, however, often change over time---whether to improve performance, or to extend them to new language features---potentially affecting behavioural and safety properties of existing programs. This is exemplified by SCOOP, a message-passing approach to concurrent object-oriented programming that has seen multiple changes proposed and implemented, with demonstrable consequences for an idiomatic usage of its core abstraction. We propose a semantics comparison workbench for SCOOP with fully and semi-automatic tools for analysing and comparing the state spaces of programs with respect to different execution models or semantics. We demonstrate its use in checking the consistency of properties across semantics by applying it to a set of representative programs, and highlighting a deadlock-related discrepancy between the principal execution models of SCOOP. Furthermore, we demonstrate the extensibility of the workbench by generalising the formalisation of an execution model to support recently proposed extensions for distributed programming. Our workbench is based on a modular and parameterisable graph transformation semantics implemented in the GROOVE tool. We discuss how graph transformations are leveraged to atomically model intricate language abstractions, how the visual yet algebraic nature of the model can be used to ascertain soundness, and highlight how the approach could be applied to similar languages.Comment: Accepted by Formal Aspects of Computin

Connie Caregiver\u27s Cook Book

Compiled by the staff of the Day Care Training Program for Regions I, II, III, and IV at the University of Nebraska at Omaha

It's picnic time: foods 1

By Marian Beebe and Flora Carl--Page 1.Title from caption

Effect of Music Intervention on Independence in Activities of Daily Living for Children with an Autism Spectrum Disorder

This study examined the effects of music intervention on performance of three activities of daily living (ADL) tasks by a child with an autism spectrum disorder (ASD) in the child’s preschool classroom at school. Researchers explored the impact of this intervention on the child’s ability to complete three self-care activities of daily living: putting on a jacket, handwashing, and eating with a spork

Paleo diet vs. modified paleo diet: A randomized control trial of health quality and benefit

Consuming a diet similar to our hunter-gatherer ancestors has been shown to confer numerous health benefits. Our purpose was to compare metabolic, physiological, and psychological improvements of participants consuming a full-scale Paleolithic-type diet (PD) or a modified Paleolithic-type diet (MPD). Twenty participants (WT 74.9+3.3kg; BMI 26+1kg/m2) aged 43+3 yrs were enrolled in a two-group, clinical 5-week dietary intervention study comparing a PD to a MPD. All participants were instructed to maintain current activity levels and turn in weekly diet compliance records. Both groups were instructed to consume only items that are included in a traditional Paleolithic-type diet (i.e. lean meats, f/v, eggs, nuts, and fish); however MPD participants were allowed to include three ‘unrestricted meals’ and two ‘unrestricted snacks’. Outcome measures included insulin sensitivity, body composition and weight, blood pressure, and lipid profiles. Five-week data showed a significant within group decline in WT (-3.3+0.4kg), BMI (- 1.2+0.2kg/m2), FFM (-0.9+0.3kg), Fat Mass (-2.2+0.3kg), and % Body Fat (-1.6+0.4%) over time, all p\u3c0.05. Clinically, all biochemical and blood pressure measures improved, however there were no significant between group differences. Both groups had 70% retention. Following both a full-scale or modified Paleolithic-type diet for 5-weeks resulted in significant reductions in body weight, fat mass, and percent body fat and may be beneficial for lowering blood pressure, and improving insulin sensitivity and lipid profiles. The present research suggests that following a modified Paleolithic-type diet can have similar physiological benefits as the more restrictive full-scale Paleolithic-type diet. More research needs to be conducted to examine the extent of these benefits

Documented Techniques in the Creation of Flatware

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