Sökning: "Johan Sandberg"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden Johan Sandberg.

  1. 1. Ambiguity Domain Definitions and Covariance Function Estimation for Non-Stationary Random Processes in Discrete Time

    Författare :Johan Sandberg; Lunds universitet.; Lund University.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The ambiguity domain plays a central role in estimating the time-varying spectrum of a non-stationary random process in continuous time, since multiplication in this domain is equivalent with estimating the covariance function of the random process using an intuitively appealing estimator. For processes in discrete time there exists a corresponding covariance function estimator. LÄS MER

  2. 2. CD8+ T cell specificity in thymic selection and in the recognition of antigen

    Detta är en avhandling från Stockholm : Karolinska Institutet, Microbiology and Tumor Biology Center (MTC)

    Författare :Johan Sandberg; Karolinska Institutet.; Karolinska Institutet.; [1999]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; T cell; specificity; MHC class 1; selection; tolerance;

    Sammanfattning : Specificity mediated by the T cell receptor (TCR) is of fundamental importance for the ability of T cells to function, and regulate humoral immunity and effector mechanisms of the innate immune system. T cells recognize composite molecules consisting of products of the major histocompatibility complex (MHC) class I or class 11 loci, in complex with a short peptide fragment derived from endogenous or antigenic proteins. LÄS MER

  3. 3. Discrete Stochastic Time-Frequency Analysis and Cepstrum Estimation

    Detta är en avhandling från Lund University

    Författare :Johan Sandberg; Lunds universitet.; Lund University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ambiguity domain; time-frequency analysis; time-frequency representations; covariance function; non-stationary random processes; Speaker recognition; MFCC; cepstrum;

    Sammanfattning : Popular Abstract in Swedish Det är ofta fördelaktigt att i olika sammanhang representera våra observationer av verkligheten med en följd av tal. Så skilda exempel som ljud, bilder, hjärnvågor, havsvattenvågor, jordbävningar och aktiekurser kan låta sig beskrivas av följder av tal. LÄS MER

  4. 4. Process integration as a tool for energy systems analysis application to LKAB in Kiruna

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Johan Sandberg; Luleå tekniska universitet.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

    Sammanfattning : In recent years, increased concern over global warming has put focus on the emissions of fossil CO2 into the atmosphere. Due to a strong relationship between the use of energy and the burning of fossil fuels, reducing society’s energy use has become increasingly important. LÄS MER

  5. 5. Social Policy of Our Time? An Inquiry into Evidence, Assumptions, and Diffusion of Conditional Cash Transfers in Latin America

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Johan Sandberg; Lunds universitet.; Lund University.; [2014]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Social policy; conditional cash transfers; policy diffusion; poverty; human capital; Latin America; Uruguay; Guatemala;

    Sammanfattning : This dissertation presents an inquiry into existing evidence, underlying assumptions, and the rapid diffusion of conditional cash transfers (CCTs) in Latin America. Equally concerned with empirical research on CCTs’ assumed capabilities and the programmes’ political economy and social policy contexts, this inquiry combines systematic analyses and case studies from field work in Uruguay and Guatemala. LÄS MER