Search for dissertations about: "last 2000 year"

Showing result 1 - 5 of 37 swedish dissertations containing the words last 2000 year.

  2. 1. Hilbert space frames and bases : a comparison of Gabor and wavelet frames and applications to multicarrier digital communications

    Author : Niklas Grip; Luleå tekniska universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Abstract : Several signal processing applications today are based on the use of different transforms. The signals under consideration are written as a linear combination (or series) of some predefined set of functions. Traditionally, orthogonal bases have been used for this purpose, for example, in the discrete Fourier transform. READ MORE

  4. 2. Empirical essays on financial markets, firms, and derivatives

    Author : Niclas Hagelin; Ingrid M. Werner; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Financial markets; Stock markets; Future markets; Options; Derivates; Hedging; Derivathandel; Business studies; Företagsekonomi; Business Administration; företagsekonomi;

    Abstract : This thesis consists of five self-contained studies. The first three investigate the impact of derivatives on the markets for the underlying assets, while the other two examine how and why firms use derivatives. A summary of each of the five studies follows. READ MORE

  5. 3. Studies of the prevalence of asthma and allergy i Costa Rican school children

    Author : Manuel E. Soto-Quiros; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Asthma; rhinitis; eczema; children; prevalence; Costa Rica;

    Abstract : Objectives The main aims of our study were: To determine the prevalence and severity of asthma, rhinitis, rhinoconjuntivitis and dermatitis in school children from Costa Rica (I, IV, V) to make international comparisons and to identify possible risk factors associated with these conditions (II, III).Methods Using nationally representative samples of 9931 school children from Costa Rica during the last 10 years (from 1989 to 1998) we have performed three studies. READ MORE

  6. 4. The Swedish Knee Arthroplasty Register. Validity and Outcome

    Author : Otto Robertsson; Lund Ortopedi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; orthopaedics; Surgery; outcome.; survival; register; Swedish; revision; Knee; arthroplasty; traumatology; Kirurgi; ortopedi; traumatologi;

    Abstract : The Swedish Knee Arthroplasty Register (SKAR) was initiated in 1975 to prospectively follow patients operated on with knee arthroplasty. With revisions utilized as the end-point in survival analyses, it is of importance that all revisions of included patients are reported. READ MORE

  7. 5. Leukaemic relapse after allogeneic haematopoietic stem cell transplantation and the use of the graft-versus-leukaemia effect

    Author : Stefan Carlens; Karolinska Institutet; Karolinska Institutet; []
    Keywords : haematopoietic stem cell transplantation; GVHD; GVL; DLI; T-cell culture; retroviral transduction; NK-cell culture;

    Abstract : Survival after allogeneic haematopoietic stem cell transplantation (HSCT) has improved over the last decades due to improvements in immunosuppressive regimens and supportive care. Today the major risk of treatment failure is recurrent leukaemia, a risk which has stayed relatively constant over the years. READ MORE