Webdemos: An Interactive, Web-Based Visualization and Simulation
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Webdemos: An Interactive, Web-Based Visualization and Simulation
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International Conference on Web & Open Access to Learning 2014, Dubai
Webdemos: An Interactive, Web-Based Visualization and Simulation Framework for Open Access David Rörich, Michael Bernhard, Thomas Handte and Stephan ten Brink
26 November 2014
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Introduction Example: Chromatic dispersion on optical fibers
Problem
Mathematical formulation is hard to interpret Only solvable numerically, in general
→ Use computer simulations
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Introduction Numerical simulation Length: 30 km Bit rate: 10 Gbit/s
But what, if we change...
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Outline
Introduction
Motivation
Design goals
Implementation
Examples
User survey
Conclusion
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Motivation Visualization in STEM
Simulation in STEM
Reveals complex relationships
Conveys information concisely
But: mostly static
Can save costs and time Ever more important engineering skill
But: rarely taught together with its application – if at all
→ Webdemo: An interactive simulation and visualization tool
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Design goals
Open access –
Motivate students by an active learning experience
Easy creation –
► Standard web technologies
Interactivity –
Accessible at any time, from anywhere, by anyone
► Reusable framework
Encourage authors to create new Webdemos
Demonstration –
Provide implementation examples of simulation systems
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► On-demand simulations
► Downloadable source code and open source software
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Implementation Server-side simulations
Client-side simulations
no transmission delay
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reduced client-side requirements
predictable simulation time
reuse of simulation models
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Implementation Server-side simulations
Client-side simulations
no transmission delay
reduced client-side requirements
predictable simulation time
reuse of simulation models
→ chosen here 26.11.2014
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Implementation Simulation core
GNU Octave
Many built-in functions (math, transforms, filters, statistics, ...)
Versatile visualizations
Compact source code
Widely compatible to Matlab
Free and open source www.gnu.org/software/octave
→ Students can download, execute and change the simulation scripts
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Implementation
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Examples Webdemo: Chromatic dispersion Webdemo: Equalization using the Viterbi algorithm Webdemo: Tapped-Delay Line Channel Model Many more Webdemos can be found at www.inue.uni-stuttgart.de/webdemo
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User survey Agreement to the statement “Webdemos help to illustrate the topics of the lecture“
26.11.2014
Electrical engineering/information technology courses 149 participants undergraduate and graduate students German and international study courses
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Conclusion Summary
Future work
A novel interactive, web-based visualization and simulation framework
Minimum client-side requirements
Downloadable simulation scripts
Easy creation of new Webdemos
New input types like matrices, file upload, … New result types like animations, sounds, … Easy and fast comparions of parameter sets ...
Visit us on www.inue.uni-stuttgart.de/webdemo
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Visitor Statistics
Date range Visits Average visit duration Visits from Stuttgart Distinct countries Users with Java Plugin Users with Flash Plugin Existing Webdemos
