Browsing by Author "Turunen, Arttu"

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  • Implementation of an automatic log analysis tool for health care applications
    (2024-03-11) Turunen, Arttu
     Sähkötekniikan korkeakoulu | Master's thesis
    Large software applications generate extensive amounts of log data to monitor behavior and diagnose software issues. While log data can be examined manually, the large volume of log data makes manual examination error-prone and time-consuming. Log data analysis software and methods have been developed to automate log data analysis, thereby enhancing software reliability and development. Commercial and open-source log analysis software exists, but this cannot always be used due to various restrictions, such as data security. In this case, an automatic log data analysis program has to be implemented from scratch. In this thesis, we designed and implemented an automatic log analysis program for the healthcare software Effector by seeking inspiration from studies and existing implementations. We tailored the implementation to the requirements of the Effector and implemented anomaly detection using statistical methods based on Z-score and sliding window. We tested the implementation against real data from Effector in real use cases and detected genuine anomalies in the production data. During the analysis of six months of log data, the log analysis program detected between 10 and 40 anomalies per week, depending on the size of the source data examined. For instance, the log analysis program detected a critical bug in the automatic import of patient data after an Effector version update. This bug would have gone unnoticed for a longer period without the assistance of the program.
  • The Past, Present and Future of Robot Operating System (ROS)
    (2020-05-25) Turunen, Arttu
     Sähkötekniikan korkeakoulu | Bachelor's thesis