Here's a selection of possible bachelor and master topics. If you're interested in one of them, don't hesitate to contact us! We'll sit down, have tea, and talk about what we great things we could do together.

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Bachelor Topics

Graph Layout

• Implement Greedy Switch Heuristic for Crossing Minimization
  The order of nodes in a layer determines the number of crossings and is computed during the crossing minimization step. The results can usually be further improved by switching the order of nodes around, which we currently lack proper algorithms for. 
• Layering Algorithms
  Implement an alternative algorithm for the layer assignment problem used in the layer-based approach to graph layout.
• Tight Packing of Connected Components
  Different connected components of a graph are often laid out separately and combined again afterwards. This combination step often produces too much whitespace. Research relevant 2D packing literature and implement a better solution.
• Integrate KIML with JGraph
  Provide automatic layout through KIML for the JGraph diagram library and develop a simple JGraph-based graph editor to test the integration with.
• Improved Edge Label Placement
  Our layout algorithm already supports the placement of edge labels. However, there's still room for improvement...

Modeling Pragmatics

• Comment Attachment
  When computing a new layout for a diagram that contains comments (comparable to comments in source code), the comments often get placed far away of the nodes they refer to. This is because often the reference is not explicitly encoded in the original model. We have used a distance-based metric in the past to discover references automatically, but there are lots of ideas for improvement. This bachelor thesis would implement them, perhaps come up with additional ideas, and finally evaluate them in a thorough experiment.
• Control Flow Graph Exploration / Visualization
  Use pragmatics concepts (automatic layout, focus & context) for exploring/visualizing control flow graphs and specific paths, eg. as computed by OTAWA WCET analysis tool, eg. using Klighd.
• OMG DD Format
  Explore the mapping of KGraph / KRendering to the Diagram Definition format of the OMG.

Semantics and Synchronous Languages

• Validation Manager for Models
  Develop an integrated, flexible and generic syntactic validation framework for models (e.g. Esterel or SyncCharts).
• SCCharts compiler validation with Esterel
  Automate the validation of the SCCharts compiler using the Esterel simulation.
• Transformation from SCCharts to Esterel [possibly also Master Topic]
  Develop a transformation in Xtend2 to generate Esterel code for SCCharts.
• Hardware Synthesis from SCCharts to FPGA [possibly also Master Topic]
  Use the circuit-based code generation to produce code for FPGAs
• Automatic documentation generation [possibly also Master Topic]
  Develop an automatic SCCharts documentation system
• Optimizations for the SCCharts compiler [possibly also Master Topic]
  Profile the actual SCCharts compiler and apply optimizations
• Multi-core SCCharts compiler [possibly also Master Topic]
  Implement the possibility to use more than one core to compile large SCCharts
• Adding dataflow to SCCharts [possibly also Master Topic]
  Add dataflow to SCCharts 

Miscellaneous Topics

• Developing an Info Screen
  Info screens are screens that present data in ways that can be easily understood. This includes static data (project description graphics, members of a team, ...) as well as dynamically aggregated data (bug statistics, automatic build overviews, ...). This topic is about developing such an info screen for our group and making it easily configurable.

Master Topics

Graph Layout

• Layering Algorithms
  Develop an alternative algorithm for the layer assignment problem used in the layer-based approach to graph layout. The algorithm shall be extended to consider the number of edge crossings and an optimal aspect ratio.
• Node Placement
  Develop a new node placement algorithm that finds a good balance between keeping edges straight and keeping the drawing from getting too big.
• Compound Graph Layout
  Design and implement new concepts for computing layer-based layouts of compound graphs. The main focus shall be on maintainability: ensuring that the implementation can be kept working over the years.
• Force Based Drawing with Port Constraints
  Develop methods for integrating port constraints in force-based drawing approaches. The resulting node placement shall be evaluated using an edge router such as libavoid on the model library of Ptolemy.
• Combining Forces and Layers
  Design and implement a layout algorithm that combines the force-based and the layer-based approaches. The first three phases of the layer-based approach shall be replaced by a node distribution computed with a force-based approach.

Modeling Pragmatics

• Diagram Description Language
  Developing the concepts and implementation of a diagram description language based on Klighd, with SyncCharts as application example.

Semantics and Synchronous Languages

• Quartz
  Integrate the synchronous Quartz language into KIELER for validation purposes and teaching.
• Implementation of a priority-based compilation approach
  Implement the SyncCharts priority-based compilation approach into the SCCharts compiler chain.
• Curing Schizophrenia in SCCharts
  Develop new synchronizer to handle schizophrenia properly (e.g. depth join).
• Detecting tick boundaries in SCCharts
  Implement an algorithm that detects tick boundaries (in concurrent) threads and therefore improves the scheduling
• Preserving concurrency/parallelism for multi-core 
  Evaluate possibilities to preserve parallelism in SCCharts.
  
• Railway 2.0
  Design a new and modern hardware controlling (Version 4) for the railway installation.