Bachelor's and Master's Projects and Theses at the Chair for Algorithms and Data Structures.

Application for a project or thesis

If you are interested in doing a project or theses with us, please carefully read this page first and then send an e-mail to the prospective supervisor with the following information:

1. Acknowledge that you have carefully read this whole page (not just the first section).
2. Which courses have you already taken with us.
3. A very short description of your interests and your strengths (concerning work on a project/thesis).
4. A transcript of the grades of the courses you have take so far.
5. If you have an own project in mind (not necessary): a very short description of the goal and the scientific merit.

Thesis with supervision from an external company

If you want to do your thesis with a company, please provide the following additional (to the list above) information in a concise format (one understandable and informative paragraph for each of the items below):

1. What is the expected / aimed at outcome?

2. How does your approach and the expected result differ from the state of the art? See the section on "Related Work" in our guidelines.

3. How do you plan to evaluate your work. See the sections on "Theoretical Analysis" and "Empirical Analysis" in our guidelines.

4. Supervision must be provided by the company and the supervisor should provide an evaluation report at the end of the thesis, in a format to be discussed with us.

Deliverables of a project or thesis

B.Sc. and M.Sc. projects

1. Your code and your data, which allows reproducibility of your results. This is explained in detail on our Reproducibility page, together with a simple working example.

2. A project website. Here is a long list of examples. The pages must be in a subfolder www in your folder in our SVN. They should not require any special installation, but work just by copying them somewhere. Note that this does not exclude interactive elements, as long as all the required (JavaScript) code is also contained in the www subfolder.

B.Sc. and M.Sc. thesis

1. Your code and your data, which allows reproducibility of your results. This is explained in detail on our Reproducibility page, together with a simple working example.

2. A written thesis. See our Guidelines for how to write a proper thesis. Here is a long list of examples.

3. An oral presentation. Duration: 20 minutes for the presentation + time for questions afterwards. Place: Room 028, 2nd Floor, Building 51. You should be there 15 minutes earlier for setup and testing.

Grading scheme for the theses

Your final grade for the thesis will be an average of four grades, one for each of the following four aspects:

1. Quality of the conceptual/theoretical work. This includes aspects such as:
   1. How well were the ideas thought out / the details worked out
   2. How independent was the work
   3. How meaningful and interesting/useful were the results.
2. Quality of the implementation work. This includes aspects such as:
   1. Are the installation instructions easy to understand
   2. Can we run your code and reproduce your results
   3. Is the code well documented, did you adhere to a proper coding style, are there unit tests (these are all basic requirements in every course offered by our chair).
3. Quality of the evaluation. This includes aspects such as:
   1. Is the experimental setup well described
   2. Is the selection of datasets reasonable (there should be at least two, with different characteristics)
   3. Is there a comparison with a reasonable baseline or competitor method
   4. Are the results correct
   5. Are the results properly discussed

4. Quality of the write-up. This includes the aspects described in our guidelines for writing a thesis

Available and ongoing projects and theses

= Available; = Ongoing

Click on the titles for a more detailed description of the project, including background info, goals, and first steps. Note that for some topics, it can make sense if several people work on them concurrently. So ongoing does not necessarily mean, that the topic is no longer available.

Generating Regular-Interval Maps from Public Transit Data (project or thesis, ongoing): We are looking for well-structured input data for our transit-map drawing algorithm. The goal of this topic is to provide the transit-mapper with a graph from which it can render regular-intervall timetable maps ("Taktfahrplankarten") like this. You should be a fan of huge datasets, timetable data and of course graphs (but who isn't). As a bachelor or master project with the possibility of continuation as a thesis. Supervised by Patrick Brosi.

Merging Overlapping GTFS Feeds (Bachelor project or thesis, ongoing): Many transportation companies publish their timetable data either directly as GTFS feeds or in formats that can be converted to GTFS. As soon as you have two GTFS feeds (two sets of timetable data) that cover either the same or adjacent areas, the problem of duplicate trips arises. You should develop a tool that merges two or more GTFS feeds and solves duplication / fragmentation issues. As a bachelor project or thesis. Supervised by Patrick Brosi.

GTFS Browser Web App (Bachelor project or thesis): Develop a web-application that can be used to analyze huge GTFS datasets. There are already some tools available (for example, ScheduleViewer) but they all feel and look quite clumsy, are incredible slow and cannot handle large datasets. Supervised by Patrick Brosi.

Merging Hyphenated Words & Guessing Ligatures (Master thesis, ongoing): PDF is a layout-based format: it specifies the positions and fonts of the individual characters, of which the text is composed, but usually does not provide any information about words, paragraphs and sections. You should write code, that (1) merges hyphenated words with respect to compound words and (2) "guesses" characters (e.g., ligatures) that can't be identified as textual content. Supervised by Claudius Korzen.

Extract and Analyze Scientist's Homepages (project and/or thesis): Extract a large number of scientist's homepages from the CommonCrawl web crawl. Extract the central information from these pages, including: name, profession, gender, affiliation. It will be relativel straightforward to get results of medium quality. The challenge is to achieve results of high quality. Machine learning will be crucial to achieve that. Exploring suitable methods is part of the challenge. Supervised by Hannah Bast.

Tokenization Repair (project and/or thesis): Interesting and well-defined problem, the solution of which is relevant in a variety of information retrieval scenarios. Simple rule-based solutions come to mind easily, but machine learning is key to get very good results. A background in machine learning, or a strong willingness to aquire one as part of the project/thesis, is therefore mandatory for this project. Supervised by Hannah Bast.

Combined SPARQL+Text search (project or thesis): This is well-suited as a project (B.Sc. or M.Sc.) but also provides ample opportunity for continuation with a theses (B.Sc. or M.Sc). You should be fond of good user interfaces and have a good taste concerning layout and colors and such things. You should also like knowledge bases and big datasets and searching in them. Supervised by Hannah Bast.

Synonym Finder (project and/or theses): Find synonyms for all entities from Freebase or WikiData or Wikipedia. Evaluate the quality and compare it to existing synonym databases like CrossWikis. Motivation: Most entities are known under several names. For example, a person like "Ellen DeGeneres" is also known as just "Ellen". A profession like "Astronaut" is also known as "Spaceman", "Spacewoman" or "Cosmsonaut". Knowing these synonyms is key for many NLP (Natural Lanuage Processing) problems. Including complex problems like semantic search and question answering. Supervised by Hannah Bast.

A Search Engine for OpenStreetMap Data (project and/or thesis): Implement the backend for a search engine for OpenStreetMap data. Your server should load an arbitrary .osm file and answer (fuzzy) string searches over the entire dataset. This is a nice project to familiarize yourself with different index structures. Continuation as a thesis is possible. Preferably you have visited our lecture Information Retrieval, but this is not required. Code should be written in C++. Supervised by Patrick Brosi.

Tabular Information Extraction (project and/or thesis): Extract data from a knowledge base in a tabular format. This could for example be a list of cities with columns for the country they are in, population count and coordinates but really anything fitting in a table should be possible. Think of the typically hand crafted summary tables on Wikipedia. This is well-suited as a project (B.Sc. or M.Sc.) with possible continuation as a thesis. You should be interested in knowledge bases, big datasets and searching in them. Supervised by Niklas Schnelle.

Conversational Aqqu (project and/or thesis): In this project you will be working on an extension to our Question Answering system Aqqu. This extension will enable follow-up questions and thus a more natural interface. Supervised by Niklas Schnelle.

Question Anwering on WikiData: make our question answering work on WikiData. WikiData is currently growing fast and will become the new Freebase. It's an exciting dataset. Supervised by Hannah Bast.

A Simple chat bot: Build a simple chat bot using deep learning. For a recent example of such a chatbot, see Woebot. This topic gives you a lot of freedom concerning the outcome, but it is also free in the sense that you have to research yourself what is out there already and what can realistically be achieved in six months yourself. Supervised by Hannah Bast.

Error Correction for Question Answering: Design and build a system that accepts a (relatively simple) question in natural language and automatically corrects typos etc. This should be realized with a character-based language model learned using deep learning (e.g., with an RNN). Supervised by Hannah Bast.

Crawling and Analysis of Scientist Homepages: Design and build a system that crawls as many homepages of scientists as possible and creates a neat knowledge base from this information (Name of Scientist, Affiliation, Gender, Title). In previous work, we tried extracting this information from the CommonCrawl archive, but that turned out to be much too incomplete and unreliable. This is a challenging problem with large practical value. Supervised by Hannah Bast.

Bitcoin trading app Design and implement a reasonably clever (not to reckless and not to conservative) algorithm for trading bitcoins. Evaluate on historical data and implement an API and a web app to monitor on live data. Take into account all the actual costs incurred (like taxes and fees). Analyse the return of investment that can be reasonably expected. Supervised by Hannah Bast.

Entity Recognition on a Web Corpus Design and implement a named-entity recognizer for a web-size corpus. Supervised by Hannah Bast.

Context Decomposition of a Web Corpus Decompose the sentences of a given web-size corpus into their semantic components, using fancy technology developed in our group. Supervised by Hannah Bast.

Instructions for students and supervisors

First meeting

In the first meeting with the supervisor, create a Google Doc where you copy and fill out the following template. The Google Doc must be named Firstname Lastname and it should be shared with at least the following people: Student, Supervisor(s), Hannah Bast ( bast.hannah@gmail.com ), Frank Dal-Ri ( nirlad@gmail.com , our system administrator), Heike Hägle ( hhaegle@gmail.com , our secretary).

Type: [one of: Bachelor Project, Bachelor Thesis, Master Project, Master Thesis] 
Short working title of project/thesis: [this may change later]

RZ Account: [initials + number, e.g. ''es437'']
Department Account: [usually the first seven letters of the given name + the initial of the first name, e.g. ''scissore'']
Primary e-mail adress:
SVN: [subdirectory in student-projects or student-theses, named firstname-lastname, e.g. ''edward-scissorhands'']]
Special RAM requirements:
Special Disk space requirements:
Actual beginning of work:
Planned end of work:


Goal:
Subgoals:
First steps:
Deadline for first steps:

The first steps should be something relative fail-safe which can just "be done". If the first steps are not even remotely finished by the agreed-upon deadline, we might not want to supervise you further. Supervision is a considerable effort for us and we care a lot about it. In particular, we spent a lot of thought and effort on formulating interesting topics (and goals, and subgoals, and first steps) which are interesting and relevant and related to our actual research. We care about the results of these projects/theses, so you should also care working on them.

Follow-up meetings

It usually makes sense to have a few follow-up / progress meetings over the course of the projects. They usually take place, after certain milestones have been reached. Students should come well-prepared to these meetings. Here is a checklist:

1. Concise(!!) list of what has been done in the Google Doc (at the top)
2. Concise list of questions, if you have any
3. Code written so far should be in the SVN, not (only) on your local computer
4. All relevant files should be on our file system, not (only) on your local computer
5. A working demo of whatever you have done so far
6. The demo should run on our servers, not just locally on your computer
7. Bring your laptop (just in case there is uncommitted stuff)

Completed projects and theses

List of completed B.Sc. and M.Sc. theses (each with the written thesis and presentation)

List of completed B.Sc. and M.Sc. projects (each with a project website)