Sökning: "Cellular Neural Network"

Visar resultat 11 - 15 av 35 avhandlingar innehållade orden Cellular Neural Network.

  1. 11. On Enhancement and Quality Assessment of Audio and Video in Communication Systems

    Författare :Andreas Rossholm; Blekinge Tekniska Högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; QoE; video quality assessment; video quality metric; multi-linear regression; artificial neural network; support vector machine; quality predictor; machine learning; temporal scaling; spatial scaling; video compression; deblocking filter; noise cancelling; synchronization; audio delay; video delay; GSM interference signal; noise cancellation; notch filtering;

    Sammanfattning : The use of audio and video communication has increased exponentially over the last decade and has gone from speech over GSM to HD resolution video conference between continents on mobile devices. As the use becomes more widespread the interest in delivering high quality media increases even on devices with limited resources. LÄS MER

  3. 12. Computational modeling of the neural mechanisms underlying working memory

    Författare :Julian Macoveanu; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : The performance on various cognitive tasks, from language to selective attention and guiding future actions depends on working memory (WM), the capacity to hold and manipulate limited items of information. However, neural basis of WM and the capacity limitation are still unclear. LÄS MER

  4. 13. Neural mechanisms underlying working memory : computational and neuroimaging studies

    Författare :Julian Macoveanu; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The performance on various cognitive tasks, from language to selective attention and guidance of future actions depends on working memory (WM), the ability to hold and manipulate limited items of information for a period of up to a few seconds. During childhood development, WM capacity, the number of items one can maintain in WM, increases. LÄS MER

  5. 14. Induced pluripotent stem cell (iPSC) modelling for the identification of mechanisms behind neurodevelopmental disorders

    Författare :Loora Laan; Niklas Dahl; Jens Schuster; Joakim Klar; Anna Falk; Jared Sterneckert; Uppsala universitet; []
    Nyckelord :Induced pluripotent stem cells; Neurogenesis; Neural differentiation; Down syndrome; Dravet syndrome; Ataxia; Medical Cell Biology; Medicinsk cellbiologi;

    Sammanfattning : Human induced pluripotent stem cells (iPSCs) have opened new possibilities to recapitulate disease mechanisms and to model disorders in vitro. In the studies presented here, iPSCs were established to model neural differentiation in Down syndrome (DS), caused by trisomy for chromosome 21 (T21); Dravet syndrome (DRS), caused by variants in the SCN1A gene; and an ataxia syndrome, caused by a variant in the NFASC gene. LÄS MER

  7. 15. Calcium signaling and network activity : mathematical modeling and molecular mechanisms

    Författare :Erik Smedler; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The calcium (Ca2+) ion is a versatile second messenger present in all cells. It is involved in such diverse processes as cell division, differentiation, vesicle transport and muscle contraction. Its widespread applicability is partially explained by its wide temporal and spatial dynamics. LÄS MER