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  • 1.
    Albertsson, Kim
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab. CERN.
    Gleyze, Sergei
    University of Florida.
    Huwiler, Marc
    EPFL.
    Ilievski, Vladimir
    EPFL.
    Moneta, Lorenzo
    CERN.
    Shekar, Saurav
    ETH Zurich.
    Estrade, Victor
    CERN.
    Vashistha, Akshay
    CERN. Karlsruhe Institute of Technology.
    Wunsch, Stefan
    CERN. Karlsruhe Institute of Technology.
    Mesa, Omar Andres Zapata
    University of Antioquia. Metropolitan Institute of Technology.
    New Machine Learning Developments in ROOT/TMVA2019In: 23rd International Conference on Computing in High Energy and Nuclear Physics (CHEP 2018), EDP Sciences, 2019, Vol. 214, article id 06014Conference paper (Refereed)
    Abstract [en]

    The Toolkit for Multivariate Analysis, TMVA, the machine learning package integrated into the ROOT data analysis framework, has recently seen improvements to its deep learning module, parallelisation of multivariate methods and cross validation. Performance benchmarks on datasets from high-energy physics are presented with a particular focus on the new deep learning module which contains robust fully-connected, convolutional and recurrent deep neural networks implemented on CPU and GPU architectures. Both dense and convo-lutional layers are shown to be competitive on small-scale networks suitable for high-level physics analyses in both training and in single-event evaluation. Par-allelisation efforts show an asymptotical 3-fold reduction in boosted decision tree training time while the cross validation implementation shows significant speed up with parallel fold evaluation.

  • 2.
    Lindblom, William
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Overall Quality Measurement for Guideline Compliance: A Study in Software Quality2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 3.
    Rapp, Thomas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology. Julius-Maximilians University of Würzburg, Department of Mathematics and Computer Science, Chair of Aerospace Information Technology, Professorship of Space Technology.
    Development and Implementation of a Mission Planning Tool for SONATE2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In the scope of the master's project which is documented with the present thesis a mission planning tool (MPT) for SONATE was developed and implemented. After a thorough research on the current state of the art of MPTs and taking especially the early stage of the SONATE mission into account, it was decided to develop a generic timeline-based MPT. In contrast to existing MPTs a system is envisioned which is both powerful, regarding advanced features like resource control, and applicable for small satellite missions regarding the overall complexity and the associated configuration and training effort. Although it was obvious from an early stage that this vision cannot be reached in the scope of this project, it was kept during the project definition, object oriented analysis and early design stages in order to allow future extensions. Also the decision to develop the MPT on top of the Eclipse Rich Client Platform is mainly due to the argument of future extensibility.

    The MPT, which is released with this thesis, hence is a very basic generic timeline-based MPT omitting all possible advanced features like resource control or procedure validation, but featuring all essential parts of a MPT, i.e. modelling of procedures, scheduling of activities, and the generation of telecommand sequences. Furthermore, the user is supported by an intuitive graphical user interface. The thesis documents the development process, thus giving a broad understanding of the design and the implementation. For specific details of the implementation one may also refer to the separate technical documentation, while a user handbook included as appendix.

    The characteristics of the SONATE mission as a technology demonstrator for highly autonomous systems raise several important questions regarding the overall mission planning process. Therefore, besides the actual development of the MPT, those questions are discussed in a theoretical manner in the scope of this thesis, taking also account of the general emergence of highly autonomous satellites systems.Three concepts, Safe Planning, Sigma Resource Propagation, and Direct Telemetry Feedback, are proposed to face the challenges rising from the foreseen alternation of phases of classical mission operations and phases of autonomous operations of the satellite.

    Concluding the thesis, the final software product's features and capabilities are verified against the previously defined requirements and thus the overall success of the project is determined to be a 100% success fulfilling all primary project objectives. Finally, several fields for further research on the topic in general and work on the MPT itself are identified and outlined to pave the way for follow-up projects.

  • 4.
    Suteu, Silviu Cezar
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    OPS-SAT Software Simulator2016Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    OPS-SAT is an in-orbit laboratory mission designed to allow experimenters todeploy new on-board software and perform in-orbit demonstrations of new tech-nology and concepts related to mission operations. The NanoSat MO Frame-work facilitates the process of developing experimental on-board software for OPS-SAT by abstracting the complexities related to communication across the space toground link as well as the details of low-level device access. The objective of thisproject is to implement functional simulation models of OPS-SAT peripherals andorbit/attitude behavior, which integrated together with the NanoSat MO Frame-work provide a sufficiently realistic runtime environment for OPS-SAT on-boardsoftware experiment development. Essentially, the simulator exposes communi-cation interfaces for executing commands which affect the payload instrumentsand/or retrieve science data and telemetry. The commands can be run either fromthe MO Framework or manually, from an intuitive GUI which performs syntaxcheck. In this case, the output will be displayed for advanced debugging. The endresult of the thesis work is a virtual machine which has all the tools installed todevelop cutting edge technology space applications.

  • 5.
    Zdunek, Aleksander
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Automatic error detection and switching of redundant video signals, with focus on loop detection2018Independent thesis Advanced level (professional degree), 180 HE creditsStudent thesis
    Abstract [en]

    This report describes work done on implementing automatic detection of looping frame sequences in a video signal. The central loop detection algorithm is described. Hashing of video frames is used as a means of improving computational performance. Two video signals are compared with respect to containing loops, and switching of displayed stream is done based on evaluated stream qualities. Repeating sequences -distinct from looping sequences- are also discussed, as well as cursory thoughts for further work on implementing a more comprehensive error detection package for video signals.

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