Sökning: "Tommy Bengtsson"

Hittade 3 avhandlingar innehållade orden Tommy Bengtsson.

  1. 1. Hyperspectral Image Generation, Processing and Analysis

    Författare :Hamed Hamid Muhammed; Ewert Bengtsson; Tommy Lindell; Erkki Oja; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bildanalys; hyperspectral imaging; colour filter mosaics; remote sensing; crop reflectance; surface water quality; disease severity; plant density; linear system of equations; waste water detection; chlorophyll a; suspended paticulate matter; weighted fixed neural networks; weighted incremental neural networks; camera spectrometer; Bildanalys; Image analysis; Bildanalys;

    Sammanfattning : Hyperspectral reflectance data are utilised in many applications, where measured data are processed and converted into physical, chemical and/or biological properties of the target objects and/or processes being studied. It has been proven that crop reflectance data can be used to detect, characterise and quantify disease severity and plant density. LÄS MER

  3. 2. Return Migration from Sweden : A Longitudinal Analysis

    Författare :Martin Klinthäll; Tommy Bengtsson; Barry Chiswick; Lund Unviversity Department of Economic History; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Return migration; immigrants; labour migration; Economic history; Ekonomisk historia;

    Sammanfattning : Return migration is one of the least studied areas within migration research, although it has major implications for both sending and receiving societies. The importance of the phenomenon is shown by the fact that more than 50 percent of the immigrants who arrived in Sweden in 1970 had returned after twenty years. LÄS MER

  4. 3. Benefit Design, Retirement Decisions and Welfare Within and Across Generations in Defined Contribution Pension Schemes

    Författare :Yuwei Zhao de Gosson de Varennes; Per Johansson; Edward Palmer; Tommy Bengtsson; Uppsala universitet; []
    Nyckelord :NDC; ageing population; life expectancy projection; Lee-Carter Model; benefit design; social gap in life expectancy; rate of change in mortality; Economics; Nationalekonomi;

    Sammanfattning : Essay 1 (with Juha Alho and Edward Palmer): All around the world, public pension schemes are moving in the direction of non-financial (NDC) and financial defined contribution (DC) schemes.  Both rely on accurate projections of life expectancy in the creation of annuities. LÄS MER