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Examensarbeten och uppsatser / Final Theses

Framläggningar på IDA / Presentations at IDA


Se även framläggningar annonserade hos ISY och ITN i Norrköping / See also presentations announced at ISY and ITN in Norrköping (in Swedish)

If nothing is stated about the presentation language then the presentation is in Swedish.


WExUpp - kommande framläggningar
2023-01-31 - SaS
Usability of connected vehicle data for local winter road maintenance
Erik Lindgren
Avancerad (30hp)
kl 10:15, Donald Knuth (In English)
[Abstract]
NIRA is a company based in Linköping and operates within the automotive industry. NIRA’s Tire Grip Indicator is one of their products used to create friction values during normal driving conditions. This data is, together with additional sensor information from the vehicle, such as environmental sensors, collected in NIRA’s cloud environment RSI. Utilising hundreds of thousands of vehicles, several products are created and offered to the market. This master thesis will focus on the winter maintenance industry business where NIRA provides refined information to support decision making and quality control for the winter maintenance operations both in Sweden and internationally. The master thesis will be conducted in close cooperation with several actors active in the winter maintenance business within the scope of a collaboration project.
The thesis explores how road surface information can be used as decision support for actors within road maintenance. The thesis starts with a literature study describing different perspectives of winter maintenance and its relation to decision support systems. Through the study, several decision support systems are used to analyse the road climate and the maintenance operations in the city of Gothenburg. The analysis takes the form of a case study where each day during the winter season is analysed. Several features are extracted from the cases and are used to classify each case as one of 6 categories. Finally, the cases are valued within three cost areas: traffic accidents, accessibility, and fuel consumption.
The findings of the thesis show that the different systems within the project fulfill different functions in an efficient way where the forecasting tools can be seen as tools for planning measures. At the same time, friction data from fleets of connected vehicles can help evaluate the outcome of maintenance actions. This applies especially to the possibility
of implementing and evaluating preventive measures. The findings also show several potential benefits in using road surface forecasts and road friction data in terms of financial, socio-economic, and environmental perspectives.
2023-02-07 - HCS
Utveckling av stödverktyg för automatisering av datainsamling
David Sandborg
Grundnivå (16hp)
kl 10:15, John Von Neumann (På svenska)
[Abstract]
This work aims to improve data collection by automating some parts of the manual work involve in managing survey projects with mixed-method data collection and being able to use historical data to improve response rate and response inflow. Response rates has today a downward trend and by analyzing previous data we investigate whether there are specific times or days where different groups are more willing to answer a survey. By making predictions on dispatches, the system also aims to be able to achieve a more even inflow of responses spread over several days.
In this work, a web-based software is implemented and evaluated through tests on a real project. The tests shows that in the project the system is tested in, an increase in response rates can be achieved and prediction of responses can be made at sufficient level to achieve an even distribution.
2023-02-17 - ADIT
Integrating GraphQL APIs into an RDF federation
Wiktor Karlsson
Avancerad (30hp)
kl 13:00, Muhammad al-Khwarizmi (In English)
[Abstract]
As data interoperability have become increasingly more important as of late, so has the topic of database query language translations. Being able to translate between different query languages, both old and new, could potentially improve a lot of different systems. One of these hypothetical systems is HeFQUIN, a federated query engine that primarily focuses on querying many different RDF data sources by sending out SPARQL sub-queries. Exploring ways to extend this engine to include non-RDF data sources, like GraphQL for example, would naturally increase the uses of such an engine. This thesis presents, and implements, a generalized approach for translating SPARQL queries, primarily Basic Graph Patterns (BGPs), into GraphQL queries, after which the resulting JSON response received by executing the query is translated back to solution mappings. The performance of the translator implementation is then evaluated by using a set of pre-determined, specially designed, test queries. These queries are structured to encompass many different scenarios the translator could face. The results of the evaluation tests reveal that the translator implementation with its steps only constitute a comparatively small fraction of the full request to the GraphQL endpoints. Finally, it is concluded that due in part to the generalized nature of the approach, a wide range of different structured basic graph patterns are able to be translated, as long as they follow the set up requirements imposed on the BGP and the GraphQL endpoint.


Page responsible: Final Thesis Coordinator
Last updated: 2022-06-03