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Completeness and incompleteness in nominal Kleene algebra

JOURNAL OF logicAL AND ALGEBRAIC METHODS IN programming 2017年第Oct.期91卷 17-32页

作者： Kozen, Dexter Mamouras, Konstantinos Silva, Alexandra Cornell Univ Dept Comp Sci Ithaca NY 14853 USA Univ Penn CIS Dept Philadelphia PA 19104 USA UCL Dept Comp Sci London WC1E 6BT England

Gabbay and Ciancia (2011) presented a nominal extension of Kleene algebra as a framework for trace semantics with statically scoped allocation of resources, along with a semantics consisting of nominal languages. They also provided an axiomatization that captures the behavior of the scoping operator and its interaction with the Kleene algebra operators and proved soundness over nominal languages. In this paper, we show that the axioms proposed by Gabbay and Ciancia are not complete over the semantic interpretation they propose. We then identify a slightly wider class of language models over which they are sound and complete. (C) 2017 Elsevier Inc. All rights reserved.

关键词： Kleene algebra Nominal sets programming logic

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Analogy Mapping for Different Learning Style of Learners in programming 3

Analogy Mapping for Different Learning Style of Learners in ...

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3rd International Conference on Science in Information Technology (ICSITech)

作者： Sukamto, Rosa Ariani Megasari, Rani Univ Pendidikan Indonesia Comp Sci Educ Dept Bandung Indonesia

ISBN: (纸本)9781509058662

programming logic is often hard to understand for novice, but in the other side, programming is one of the most important subjects in computer science program. Analogy Mapping is a media which converts source code to analogies images using state machine in order to help students understanding programming logic easily. Therefore this paper reports our work about the effectivity of Analogy Mapping in learning process for basic programming subject students with different learning style.

关键词： programming learner programming logic logic thinking Analogy Analogy Mapping

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Web Application for Automatic Code Generator Using a Structured Flowchart 8

Web Application for Automatic Code Generator Using a Structu...

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8th IEEE International Conference on Software Engineering and Service Science (ICSESS)

作者： Supaartagorn, Chanchai Ubon Ratchathani Univ Fac Sci Dept Math Stat & Comp Ubon Ratchathani Thailand

ISBN: (纸本)9781538604977

A flowchart can be a graphic diagram representation of a programming logic. There are shapes and connectors that represent the different types of actions or steps in a process. A flowchart is a very important tool in the planning phase in a program development cycle. Programmers can use it to design and develop an algorithm of a program. Moreover, a flowchart is also very effective for visual learners to write and comprehend algorithms in computer programming courses. This paper aims to provide a tool which serves as an automatic code generator using a structured flowchart. The tool is composed of basic flowchart shapes to be combined into a structured flowchart that can be converted into source codes. In addition, the system's performance has been evaluated by two groups: 5 experts and 93 general users. The results showed the average values of the satisfaction levels were 4.48 and 4.27 with standard deviations at 0.59 and 0.64 for the experts and the general users respectively. It was found that the system performance of the tool reached an agree level. It was revealed that the developed system can be used precisely as intended in an effective manner.

关键词： Automatic code generator Structured flowchart programming logic Algorithm

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Effects of a situated 3D computational problem-solving and programming game-based learning model on students' learning perception and cognitive loads 6

Effects of a situated 3D computational problem-solving and p...

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6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

作者： Hong, Tzu-Yin Chu, Hui-Chun Soochow Univ Dept Comp Sci & Informat Management Taipei Taiwan

ISBN: (纸本)9781538606216

This study develops a situated 3D computational problem-solving and programming game-based learning (GBL) approach to engage students in learning and practicing their programming skills. programming and computational problem solving have received a great emphasis from educators in recent years. Besides, game-based learning not only provides a learning method different from conventional one-directional classes for learners to absorb knowledge but also engages learners in learning activities. Therefore, a situated 3D computational problem-solving and programming game-based learning model was developed to cultivate learners in a department of computers science and information management to use programming logic to solve problems. A quasi-experimental design was adopted. The control group used a conventional programming course while the experimental group adopted the situated 3D programming game-based learning model to investigate the effects of program-logic problem solving ability, degree of satisfaction with the learning approach and cognitive loads. It was found that although the proposed mode did not promote learners' program-logic problem solving ability immediately in a short-term, students showed a better satisfaction in solving program-logic problems and devoted more time in the games. Almost all students completed all program-logic missions. Furthermore, it was also found that the learners in the experimental group showed better degree of satisfaction with the learning approach and had lower mental efforts, implying that using the situated 3D programming game-based learning mode can effectively lower students' cognitive load and engage them in the situated game to complete the program-logic learning in the course.

关键词： Computational problem-solving game-based learning cognitive load programming logic

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programming Teaching in High Schools: an analysis based on the Discourse of Collective Subject 45

Programming Teaching in High Schools: an analysis based on t...

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45th Annual Frontiers in Education Conference (FIE)

作者： Mota, Fernando P. Adamatti, Diana F. Fed Univ Rio Grande Ctr Comp Sci Rio Grande Brazil

ISBN: (纸本)9781479984541

This paper presents a qualitative study about programming logic teaching in high school, based on the Discourse of Collective Subject. The project where this study is embedded aims to encourage a greater number of students in the areas of engineering and natural sciences, primarily girls. The main goal is to present how the high school students participating in this project understand issues related to computing learning and women inclusion in this area.

关键词： high school girl programming logic discourse of collective subject

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A formal nethod (a networked formal method)

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INNOVATIONS IN SYSTEMS AND SOFTWARE ENGINEERING 2010年第4期6卷 255-268页

作者： Breuer, Peter T. Pickin, Simon Univ Birmingham Dept Comp Sci Birmingham W Midlands England Univ Carlos III Dept Ing Telemat Madrid Spain

A year-long trial has seen a large lightweight verification problem treated by an ad hoc distributed network of identical solvers. The trialled problem is the semantic analysis of the C code in the Linux kernel to exclude a common deadlock possibility. The aim of the programme behind the experiment is to develop a viable loosely coupled distributed formal method which a community of interested part-time helpers on the net can lend their computing cycles to as they will, or send their own verification problems to for solving.

关键词： Formal methods programming logic Static analysis Linux kernel C Open source Distributed programming

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Approximate verification in an open source world

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INNOVATIONS IN SYSTEMS AND SOFTWARE ENGINEERING 2008年第1期4卷 87-105页

作者： Breuer, Peter T. Pickin, Simon Univ Birmingham Dept Comp Sci Birmingham W Midlands England Univ Carlos III Madrid Dpto Ingn Telemat Leganes Madrid Spain

This article details advances in a lightweight technology we have evolved to handle post hoc verification in the very large, uncontrolled and rapidly evolving code-bases exemplified by C language open source projects such as the Linux kernel. Successful operation in this context means timeliness, and we are currently treating millions of lines of unrestricted mixed C and assembler source code in a few hours on very modest platforms. The technology is soundly based, in that it delivers false alarms (in a ratio of about 8 to 1 in practice), rather than misses true alarms. Speed of operation is traded off against accuracy via configuration of a program logic tailored to each analysis. The program logic specification language and the theory behind it will be described here.

关键词： Open source Static analysis Linux kernel programming logic Verification

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Rapid prototyping for pervasive applications

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IEEE PERVASIVE COMPUTING 2007年第2期6卷 76-84页

作者： Weis, Torben Knoll, Mirko Ulbrich, Andreas Muehl, Gero Brandle, Alexander Univ Stuttgart D-7000 Stuttgart Germany Tech Univ Berlin D-1000 Berlin Germany

VisualRDK is a high-level programming language for prototyping pervasive applications. Context is tightly integrated into the language itself, so developers can attach functionality to locations, persons, or situation... 详细信息

关键词： Debugging Prototype Context Aware Application logic programming logic

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Strength Induction in a Haskell Program Verifier

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ELECTRONIC NOTES IN THEORETICAL COMPUTER SCIENCE 2007年 193卷 61-79页

作者： Kieburtz, Richard B. Portland State Univ Portland OR 97201 USA

Haskell employs a melange of strict and non-strict evaluation semantics, hence a Haskell verifier should be capable of checking assumptions that program variables may or may not denote well-defined values. The paper introduces a new strategy, called strength induction, that supports automatic checking of definedness assumptions. Strength induction has been implemented in Plover, an automated property-verifier for Haskell programs that has been under development for the past three years as a component of the Programatica project. In Programatica, predicate definitions and property assertions written in P-logic, a programming logic for Haskell, can be embedded in the text of a Haskell program module. Properties refine the type system of Haskell but cannot be verified by type-checking alone;a more powerful logical verifier is required. Plover codes the proof rules of P-logic, and additionally, embeds strategies and decision procedures for their application and discharge. It integrates a reduction system that implements a rewriting semantics for Haskell terms with a congruence-closure algorithm that supports reasoning with equality.

关键词： Haskell automatic verification programming logic rewriting strategies Stratego reduction normal forms theorem proving structure splitting strength induction lazy evaluation strictness

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A principled approach to operating system construction in Haskell

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ACM SIGPLAN NOTICES 2005年第9期40卷 116-128页

作者： Hallgren, T Jones, MP Leslie, R Tolmach, A Oregon Hlth Sci Univ OGI Sch Sci & Engn Portland OR 97201 USA Portland State Univ Dept Comp Sci Portland OR 97207 USA

We describe a monadic interface to low-level hardware features that is a suitable basis for building operating systems in Haskell. The interface includes primitives for controlling memory management hardware, user-mode process execution, and low-level device I/O. The interface enforces memory safety in nearly all circumstances. Its behavior is specified in part by formal assertions written in a programming logic called P-logic. The interface has been implemented on bare IA32 hardware using the Glasgow Haskell Compiler (GHC) runtime system. We show how a variety of simple O/S kernels can be constructed on top of the interface, including a simple separation kernel and a demonstration system in which the kernel, window system, and all device drivers are written in Haskell.

关键词： languages design verification operating systems Haskell hardware interface monads programming logic verification

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