Recent Submissions

  • Gibbon: An availability evaluation framework for distributed databases 

    Beitrag zu einer Konferenz
    Seybold, Daniel; Hauser, Christopher B.; Volpert, Simon; Domaschka, Jörg (Universität Ulm, 2018-12-31)
    Driven by new application domains, the database management systems (DBMSs) landscape has significantly evolved from single node DBMS to distributed database management systems (DDBMSs). In parallel, cloud computing became ...
  • The impact of the storage tier: A baseline performance analysis of containerized DBMS 

    Beitrag zu einer Konferenz
    Seybold, Daniel; Hauser, Christopher B.; Eisenhart, Georg; Volpert, Simon; Domaschka, Jörg (Universität Ulm, 2018-12-31)
    Containers emerged as cloud resource offerings. While the advantages of containers, such as easing the application deployment, orchestration and adaptation, work well for stateless applications, the feasibility of ...
  • Limiting potential level-i idle points for offset analysis 

    Beitrag zu einer Konferenz
    Sudhakar, Deepak Vedha Raj; Albers, Karsten; Slomka, Frank (Universität Ulm, 2020-01-29)
    Offset dependencies between tasks/messages ensure that there exists a fixed time interval between the activation of a set of tasks/ messages, thereby avoiding simultaneous activations. Offset-based analysis techniques ...
  • Generalized offset based response time analysis 

    Beitrag zu einer Konferenz
    Sudhakar, Deepak Vedha Raj; Albers, Karsten; Slomka, Frank (Universität Ulm, 2020-01-29)
    In real-time theory, there exist two approaches for computing the response time of tasks: the classical response time analysis (RTA) approach and the modular performance analysis with the Real-Time Calculus (MPA-RTC). The ...
  • A wideband variable width microstrip grid array antenna 

    Beitrag zu einer Konferenz
    Khan, Osama; Pontes, Juan; Li, Xuyang; Waldschmidt, Christian (Universität Ulm, 2014-12-18)
    A wideband planar microstrip grid array antenna is presented. The antenna is realized on a standard Rogers RO3003 substrate. It is fed using two centrally located microstrip vias through a ground aperture. Measured results ...
  • Substrate integrated waveguide slot-fed grid array antenna 

    Beitrag zu einer Konferenz
    Khan, Osama; Meyer, Johannes; Baur, Klaus; Waldschmidt, Christian (Universität Ulm, 2015-12-03)
    A planar substrate integrated waveguide slot-fed microstrip grid array antenna for the frequency range 76-81 GHz is presented. The antenna is realized on a standard soft RF substrate. It is fed using a transverse slot in ...
  • Evolution strategies for constrained optimization 

    Dissertation
    Spettel, Patrick (Universität Ulm, 2020-01-23)
    Evolution strategies are population-based randomized optimization strategies derived from a simplified model of Darwinian evolution. Being based on that principle, they are well-suited for black-box optimization. In that ...
  • Response time analyses of adaptive variable-rate-tasks 

    Dissertation
    Feld, Timo (Universität Ulm, 2020-01-23)
    A real-time system is a computer system that is characterized by timing correctness. One example of such a system is the electronic control unit (ECU) of a production car engine. It executes a number of tasks that share ...
  • The relevance of perceived academic control and achievement emotions for undergraduate academic success 

    Dissertation
    Respondek, Lisa (Universität Ulm, 2020-01-23)
    High dropout rates within tertiary education worldwide document challenges students have to overcome in order to succeed (e.g., OECD, 2012). For instance, they have to uphold motivation for the long term (e.g., Robbins et ...
  • Nitridische Halbleiter-Nanostrukturen als optisch auslesbare Sensoren 

    Dissertation
    Heinz, Dominik José (Universität Ulm, 2020-01-23)
    An optochemical sensor concept is presented based on the transducing properties of near-surface indium gallium nitride quantum wells. In contrast to the established electrical read-out in chemical sensing, the photoluminescence ...

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