Sökning: "Performance anomalies"

Visar resultat 16 - 20 av 39 avhandlingar innehållade orden Performance anomalies.

1. 16. Multifaceted Defense Against Distributed Denial of Service Attacks: Prevention, Detection, Mitigation

   Författare :Zhang Fu; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Data Streaming; Network Security; Overlay; Distributed Denial-of-Service; System Design; DDoS Detection; Distributed Computing;

   Sammanfattning : Distributed Denial of Service (DDoS) attacks can be so powerful that they can easily deplete the computing resources or bandwidth of the potential targets, by flooding massive packets. Internet infrastructures and network applications, including social services and communication systems for emergency management, are under the threat of the DDoS problem. LÄS MER

3. 17. Data-driven models for railway track geometry maintenance

   Författare :Hamid Khajehei; Alireza Ahmadi; John Andrews; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Data-driven models; degradation; maintenance; tamping; track geometry; planning and scheduling; railway infrastructure; Drift och underhållsteknik; Operation and Maintenance;

   Sammanfattning : Railways are currently experiencing higher demands on safety, infrastructure performance, network capacity and service quality, etc. As a result, a high level of track availability, service quality and infrastructure robustness against unexpected events is required, at reduced cost, to meet the demands. LÄS MER

4. 18. Machine Learning-Based Prediction Models and Threat Detection for Lane-Keeping Assistance

   Författare :John Dahl; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine learning; ADAS; Threat detection; Threat assessment;

   Sammanfattning : Traffic accidents have been an ongoing problem for over a century and many efforts have been made to improve traffic safety. Historically, the focus has been on passive safety with innovations, such as crumpling zones, three-point seat belts, and airbags, that aim to mitigate the impact of collisions. LÄS MER

5. 19. Adaptive Real-time Anomaly Detection for Safeguarding Critical Networks

   Författare :Kalle Ring Burbeck; Simin Nadjm-Tehrani; Erland Jonsson; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; intrusion detection; anomaly detection; real-time; clustering; adaptation; IP networks; Computer science; Datalogi;

   Sammanfattning : Critical networks require defence in depth incorporating many different security technologies including intrusion detection. One important intrusion detection approach is called anomaly detection where normal (good) behaviour of users of the protected system is modelled, often using machine learning or data mining techniques. LÄS MER

7. 20. Miniprojects and Context Rich Problems : Case studies with qualitative analysis of motivation, learner ownership and competence in small group work in physics

   Författare :Margareta Enghag; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Social sciences; context rich problems; CRP; mini projects; MP; physics in upper secondary school; Students’ ownership of learning; SOL; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Physics;

   Sammanfattning : This thesis reports case studies of students working with context rich problems (CRP) and mini projects (MP) in physics in an upper secondary school class and in a physics teacher education class at university. The students report a big shift from physics in secondary school as fun and easy, to physics in upper secondary school as boring, difficult and with lack of time for reflections and physics talking, but they also found physics as interesting in itself. LÄS MER