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IEEE Symposium on visual Languages and Human-Centric Computing (VL/HCC)

作者： Repenning, Alexander AgentSheets Inc Boulder CO 80301 USA

ISBN: (纸本)9781457712456

Accelerated by the Do-It-Yourself mindset of the Web 2.0 culture, end-user programming-programming by end users with limited or even no formal programming background-is growing rapidly. Especially in educational settings, children are exposed to computational thinking by making games, building scientific simulations and creating stories. Early educational programming languages such as Logo have made programming substantially more accessible to end-users. More recent approaches include visual programming with a drag-and-drop style of programming that makes it nearly impossible to compose syntactically incorrect programs. However, as the syntactic challenges of end-user programming are gradually fading into the past, the new frontier of semantic programming support emerges. This demonstration introduces Conversational programming, a system to make programming more conversational. A conversational programming agent runs programs one step into the future in order to help end-users visualize discrepancies between the programs they intended to write and their actual programming results.

关键词： Game design computational thinking debugging end-user programming visual programming

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visual programming with analogical representations: Inspirations from a semiotic analysis of comics

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JOURNAL OF visual LANGUAGES AND COMPUTING 2007年第2期18卷 99-125页

作者： Kindborg, Mikael McGee, Kevin Linkoping Univ Dept Comp & Informat Sci SE-58183 Linkoping Sweden

Analogical representations based on pictures of domain objects can be used in visual programming to provide a close mapping between the program and the resulting runtime display, which can make programming easier for children and other users. The use of graphical rewrite rules with before and after pictures is an example of this approach. Graphical rewrite rules have some similarities with comics strips, which also use picture sequences of graphical objects to describe dynamics in a static form. However, the visual language of comics is not used to its full potential in visual programming. We discuss how a semiotic analysis of comics can be used to address some of the limitations of graphical rewrite rules. We use a visual programming system we have designed to illustrate that comic strips can express more general computations and be more intuitive and flexible than traditional graphical rewrites. Our conclusion is that the visual language of comics has a strong potential for increasing the expressiveness and flexibility of visual programming with analogical representations of domain objects, while maintaining a direct mapping between the program representation and the runtime representation. (C) 2007 Elsevier Ltd. All rights reserved.

关键词： visual programming comics graphical rewrite rules semiotics children

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Frameworks Generate Domain-Specific Languages: A Case Study in the Multimedia Domain

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IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 2011年第4期37卷 544-558页

作者： Amatriain, Xavier Arumi, Pau Telefon Res Barcelona 08021 Spain Barcelona Media Barcelona 08018 Spain

We present an approach to software framework development that includes the generation of domain-specific languages (DSLs) and pattern languages as goals for the process. Our model is made of three workflows-framework, metamodel, and patterns-and three phases-inception, construction, and formalization. The main conclusion is that when developing a framework, we can produce with minimal overhead-almost as a side effect-a metamodel with an associated DSL and a pattern language. Both outputs will not only help the framework evolve in the right direction, but will also be valuable in themselves. In order to illustrate these ideas, we present a case study in the multimedia domain. For several years, we have been developing a multimedia framework. The process has produced a full-fledged domain-specific metamodel for the multimedia domain, with an associated DSL and a pattern language.

关键词： Domain-specific architectures visual programming life cycle CASE

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WSN Open Source Development Platform: Application to Green Learning

WSN Open Source Development Platform: Application to Green L...

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25th Eurosensors Conference

作者： Hloupis, George Stavrakas, Ilias Moutzouris, Konstantinos Alexandridis, Alex Triantis, Dimos Technol Educ Inst Athens Dept Elect Agiou Spyridonos 12210 Egaleo Greece

The dominance of Wireless Sensor Networks (WSNs) in the area of physical computing is expected and is unquestionable. As happened to all the emerging technologies after receiving the attention of a significant number of researchers, in order to ensure long term existence, the dissemination of their use must spread over a wider audience through simple and efficient educational projects. Towards this direction the current paper presents the development of a prototype, open source, multilevel, educational system based on WSN principles and oriented to "green" technology applications. (C) 2011 Published by Elsevier Ltd.

关键词： WSN Open Source Prototyping Green Learning visual programming

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FORECASTING BANK STOCK MARKET PRICES WITH A HYBRID METHOD: THE CASE OF ALPHA BANK

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JOURNAL OF BUSINESS ECONOMICS AND MANAGEMENT 2011年第1期12卷 144-163页

作者： Koutroumanidis, Theodoros Ioannou, Konstantinos Zafeiriou, Eleni Democritus Univ Thrace Dept Agr Dev Orestiada 68200 Greece Aristotle Univ Thessaloniki Sch Forestry & Nat Environm Lab Forest Informat Thessaloniki 54124 Greece

The present study aims at constructing Confidence Intervals (C.I) for the predicted values of a Time Series with the application of a Hybrid method. The presented methodology is complicated and thus is completed in different stages. Initially the Artificial Neural Networks (ANNs) is applied on the raw time series in order to estimate C.I of the forecasts. Then, the Bootstrap method is employed on the residuals generated by the preceded process. On the upper and lower limit of the estimated C.I., two new ANNs are employed in order to make point estimations (of the upper and lower limits) using of Object Oriented programming. For the empirical analysis daily observations of the closing prices of Alpha Bank stocks have been used. The sample period is extended from 28/01/2004 until 30/11/2005. The nonstationarity of the time series employed in our study is not a forbidding condition for the estimation of the confidence intervals, in our case, since the level of bootstrap still provides a satisfactory approximation for the roots arbitrarily close to unity (Berkowitz, Kilian 1996). The accuracy of the forecasts was surveyed with the use of different criteria and the results were satisfactory.

关键词： Artificial Neural Networks Confidence interval Bootstrap method visual programming Stock Markets Time Series

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Development of a Didactic Model of the Hydrologic Cycle Using the TerraME Graphical Interface for Modeling and Simulation

Development of a Didactic Model of the Hydrologic Cycle Usin...

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11th International Conference on Computational Science and Its Applications (ICCSA)

作者： Lima, Tiago Faria, Sergio Carneiro, Tiago Univ Fed Ouro Preto Dept Comp Sci TerraLAB Ouro Preto MG Brazil Univ Fed Minas Gerais Dept Cartog Belo Horizonte MG Brazil

ISBN: (纸本)9783642218989;9783642218972

Many modeling and simulation platforms provide general programming languages as interfaces for model construction. Some offers high-level modeling languages with conceptual basis and services to represent data structures and rules that will determine the model behavior. However, the direct use of a computational language is still a limiting factor to the broad usage of these platforms. Modelers often have different scientific backgrounds, presenting a lack of background on algorithms and programming techniques. Furthermore, there is no established methodology for model development. These problems confuse the modelers forcing them to deviate their attention from the problem being solved. We argue that a visual integrated development environment (IDE) can solve these problems, making easy the understanding and communication of the model conception and design. An IDE can also enforce the use of a common model development methodology. In this paper we describe a methodology for modeling Earth system phenomena using the TerraME GIMS tool, which is a visual IDE for the TerraME modeling and simulation platform. It enables users to build environmental models through visual metaphors that graphically describe models structure. We demonstrate the use of TerraME GIMS and present our methodology for the development of a didactic model for the hydrologic cycle. Future works include the development of diagrams to better describe the model behavior, including agent synchronization and communication.

关键词： Environmental Modeling Modeling Methodology visual programming TerraME GIMS Integrated Development Environment

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USING PEARSON TYPE IV AND OTHER CINDERELLA DISTRIBUTIONS IN SIMULATION

USING PEARSON TYPE IV AND OTHER CINDERELLA DISTRIBUTIONS IN ...

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Winter Simulation Conference (WSC)/Conference on Modeling and Analysis for Semiconductor Manufacturing (MASM)

作者： Cheng, Russell Univ Southampton Southampton SO17 1BJ Hants England

ISBN: (纸本)9781457721090

Univariate continuous distributions with unbounded range of variation have not been so widely used in simulation as those that are bounded (usually to the left). However situations do occur when they are needed, particularly in operations research and financial applications. Two distributions that have such unbounded range are the Pearson Type IV and Johnson SU distributions. Though both are well known in statistics, there is still a lack of methods in the literature for fitting these distributions to data which are both efficient and comprehensively reliable. Indeed the Pearson Type IV has the reputation of being difficult to fit. In this paper we identify the pitfalls and propose a fitting method that avoids them. We also show how to test the goodness of fit of estimated distributions. All the procedures described are included as VBA code in an accompanying Excel workbook available online. Two numerical examples are described in detail.

关键词： Excel workbook Fitting Johnson SU distributions Maximum likelihood estimation Moment methods Optimization Pearson Type IV Pearson type IV Probability density function Reliability VBA code cinderella distributions computational complexity continuous distributions financial applications mathematics computing spreadsheet programs statistical distributions visual programming

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PRESTI Neuroscience Stimuli Presentation Software

PRESTI <i>Neuroscience Stimuli Presentation Software</i>

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International Conference on Knowledge Management and Information Sharing

作者： Jaros, Petr Haka, Petr Moucek, Roman Univ West Bohemia Dept Comp Sci & Engn Univ 8 Plzen Czech Republic

ISBN: (纸本)9789898425812

This paper summarizes a new approach for creating test scenarios and stimuli presentation in neuroinformatics ERP experiments. The approach uses visual programming that allows creation of test scenarios without a need of any programming language knowledge. The newly designed programming language is described in this paper. Solution for weaknesses of visual programming is provided. The next part deals with performance of stimuli presentation software to ensure lowest possible latency between stimuli presentation and synchronisation with electroencephalograph.

关键词： Stimulus ERP experiment visual programming Neuroscience Performance

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App Inventor and Real-World Motivation 11

App Inventor and Real-World Motivation

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42nd ACM Technical Symposium on Computer Science Education

作者： Wolber, David Univ San Francisco Dept Comp Sci San Francisco CA 94117 USA

ISBN: (纸本)9781450305006

App Inventor is a visual "blocks" language for creating mobile apps. As part of a Google pilot program, App Inventor was taught to university students in a core curriculum course at the University of San Francisco. This paper introduces App Inventor and the course, focusing on how the language facilitated interactions with the world outside of the classroom.

关键词： visual programming Blocks programming Motivation

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Application of visual programming to Web mash up development 1

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12th International Conference on Human-Computer Interaction (HCI International 2007)

作者： Lim, Seung Chan Lowe, Sandi Koempel, Jeremy MAYA Design 2730 Sydney St Building 2 Suite 300 Pittsburgh PA 15203 USA

ISBN: (数字)9783540731054

ISBN: (纸本)9783540731047

The ongoing adoption of the latest Web development patterns such as AJAX is helping to enhance the user experience on the Web. Moreover, there is now API-based support from various vendors that allow seamless fusion of disparate data sources into a single application. However, the barrier for Web designers to integrate such features into their Web applications remains high. This hampers a wider proliferation of such novel Web applications. In this paper, we conduct an experiment to see whether visual programming is appropriate for allowing Web designers integrate the aforementioned features. For the experiment, we have developed a prototype, tentatively named WIPER that allows Web designers to incorporate pre-built JavaScript components into live Web pages using drag-and-drop. We combined rapid revision with usability testing to iteratively advance our prototype. Working with users, we have learned that with some targeted refinements, visual programming paradigm can be very effective in achieving our goal.

关键词： visual programming dataflow architecture JavaScript rapid prototyping end-user programming

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