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Visar resultat 1 - 5 av 13 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Aspects of Modeling Fraud Prevention of Online Financial Services

    Författare :Gorton Dan; Lars-Göran Mattsson; Simin Nadjm-Tehrani; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Online banking; fraud; incident response; metrics; incident response tree IRT ; value at risk VaR ; simulation; Transportvetenskap; Transport Science;

    Sammanfattning : Banking and online financial services are part of our critical infrastructure. As such, they comprise an Achilles heel in society and need to be protected accordingly. The last ten years have seen a steady shift from traditional show-off hacking towards cybercrime with great economic consequences for society. LÄS MER

  3. 2. Development of New Methods for Inferring and Evaluating Phylogenetic Trees

    Författare :Tobias Hill; Helgi Schiöth; Robert Fredriksson; Mark Wilkinson; Uppsala universitet; []
    Nyckelord :Pharmacology; Evolution; Phylogeny; SPR; Genetic Algorithm; Tree metrics; Farmakologi;

    Sammanfattning : Inferring phylogeny is a difficult computational problem. Heuristics are necessary to minimize the time spent evaluating non optimal trees. In paper I, we developed an approach for heuristic searching, using a genetic algorithm. Genetic algorithms mimic the natural selections ability to solve complex problems. LÄS MER

  4. 3. Remote Sensing of Urbanization and Environmental Impacts

    Författare :Jan Haas; Yifang Ban; Lars Eklund; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Remote Sensing; Classification; Land Use Land Cover; Support Vector Machine; Random Forest; Urbaniztion; Environmental Impact; Landscape Metrics; Ecosystem Services; Geomatik; Geomatics;

    Sammanfattning : The unprecedented growth of urban areas all over the globe is nowadays maybe most apparent in China having undergone rapid urbanization since the late 1970s. The need for new residential, commercial and industrial areas leads to new urban regions challenging sustainable development and the maintenance and creation of a high living standard as well as the preservation of ecological functionality. LÄS MER

  5. 4. Progress in Hierarchical Clustering & Minimum Weight Triangulation

    Författare :Drago Krznaric; Institutionen för datavetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; computer technology; Systems engineering; minimum spanning tree; complete linkage; hierarchical clustering; minimum weight triangulation; greedy triangulation; Data- och systemvetenskap;

    Sammanfattning : In this thesis we study efficient computational methods for geometrical problems of practical importance and theoretical interest. The problems that we consider are primarily complete linkage clustering, minimum spanning trees, and approximating minimum weight triangulation. Below is a list of the main results proved in the thesis. LÄS MER

  7. 5. Adaptive Real-time Monitoring for Large-scale Networked Systems

    Författare :Alberto Gonzalez Prieto; Rolf Stadler; George Pavlou; KTH; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Large-scale networked systems, such as the Internet and server clusters, are omnipresent today. They increasingly deliver services that are critical to both businesses and the society at large, and therefore their continuous and correct operation must be guaranteed. LÄS MER