Sökning: "Michael Speed"

Visar resultat 1 - 5 av 42 avhandlingar innehållade orden Michael Speed.

  1. 1. Calculation of scatter in cone beam CT : Steps towards a virtual tomograph

    Författare :Alexandr Malusek; Michael Sandborg; Gudrun Alm Carlsson; Michael Ljungberg; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; Radiologi;

    Sammanfattning : Scattered photons—shortly scatter—are generated by interaction processes when photon beams interact with matter. In diagnostic radiology, they deteriorate image quality since they add an undesirable signal that lowers the contrast in projection radiography and causes cupping and streak artefacts in computed tomography (CT). LÄS MER

  3. 2. Predator psychology and mimicry evolution - a theoretical analysis

    Författare :Alexandra Balogh; Olof Leimar; Michael Speed; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Müllerian mimicry; two-step evolution; gradual evolution; mutualism; predator psychology; Ethology and behavioural ecology; Etologi och beteendeekologi; etologi; Ethology;

    Sammanfattning : The evolution of Müllerian mimicry depends on many factors, among which predator psychology is the most important one. Predator avoidance learning, generalization and discrimination are primary selective agents during the evolutionary process. LÄS MER

  4. 3. Aposematism, Crypsis and Population Differentiation in the Strawberry Poison Frog

    Författare :Andreas Rudh; Anna Qvarnström; Jacob Höglund; Michael Speed; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; co-evolution; population divergence; natural selection; sexual selection; warning colouration; Oophaga pumilio; Dendrobates pumilio; aggression; explorative behaviour; colour patterns; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

    Sammanfattning : Evolutionary transitions between the two major predator avoidance strategies aposematism and crypsis are expected to be associated with changes in many important traits of animals. However, empirical studies on populations experiencing ongoing or recent transitions between these strategies are rare. LÄS MER

  5. 4. Figures of time : on the phenomenology of cinema and temporality

    Författare :Malin Wahlberg; Michael Renov; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; film theory; phenomenology; aesthetic theory; temporality; duration; speed; photography; city film; documentary; experimental cinema; Film; Filmvetenskap; Cinema Studies; filmvetenskap;

    Sammanfattning : Image and time represent a favored issue among theorists and practitioners in the history of cinema, where discussion is related to the ingenious machine, the new art, as well as the experience of film. Looking back on this debate, and considering recent accounts of 'time-images,' it is striking to note how the problem has always oscillated between issues of the medium specific and issues of film experience; that is, the ontology of cinema as a time-bound medium, the quality of rhythm, duration, and recorded views, and, not least, the sensory and affective impact of mediated sound-images. LÄS MER

  7. 5. Investigation of high speed high resolution folding A/D converters

    Författare :Michael Wang; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER