Search for dissertations about: "D Bruce"

Found 5 swedish dissertations containing the words D Bruce.

  2. 1. Long-lasting ecological legacies of reindeer on tundra vegetation

    Author : Dagmar D. Egelkraut; Johan Olofsson; Bruce Forbes; Hans Tømmervik; René van der Wal; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Alternative stable state; Herbivory; Historical contingency; Nutrient cycling; Plant-herbivore interactions; Plant-soil feedbacks; Rangifer tarandus; Reindeer herding; Traditional land use; Tundra vegetation;

    Abstract : Reindeer can have strong effects on the plant species composition and functioning of tundra ecosystems, and often promote a transition towards a graminoid-dominated vegetation type. As a result, they influence many ecological processes, such as nutrient dynamics, soil biotic composition and functioning, and carbon storage. READ MORE

  4. 2. Surgery and immuno modulation in Crohn’s disease

    Author : Pär Myrelid; Johan D. Söderholm; Peter Andersson; Rune Sjödahl; Bruce George; Linköpings universitet; []
    Keywords : Crohn’s disease; surgery; immuno modulation; complications; stoma; anastomosis; DSS; bursting pressure; MEDICINE; MEDICIN;

    Abstract : Crohn’s disease is a chronic inflammatory bowel disease with unknown origin. This study investigates the combined use of surgery and immuno modulation in Crohn’s disease. The outcome of medication and surgery in 371 operations on 237 patients between 1989 and 2006 were evaluated. READ MORE

  5. 3. Optimal Design and Inference for Correlated Bernoulli Variables using a Simplified Cox Model

    Author : Daniel Bruce; Hans Nyquist; Werner G. Müller; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cox binary model; correlated binary data; log-odds ratio; D-optimality; E-optimality; power maximization; efficiency; Statistics; Statistik; statistik; Statistics;

    Abstract : This thesis proposes a simplification of the model for dependent Bernoulli variables presented in Cox and Snell (1989). The simplified model, referred to as the simplified Cox model, is developed for identically distributed and dependent Bernoulli variables. READ MORE

  6. 4. Ab Initio Simulations of Transition Metal Alloys: Towards the Multiscale Modeling

    Author : Leonid Pourovskii; Igor Abrikosov; Bruce Harmon; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; first principles simulations; transition metal alloys; surface segregations; fully-relativistic method; Monte Carlo method; Fysik; Physics; Fysik; fysik; Physics;

    Abstract : The present thesis concerns applications of first principles electronic structure calculations in conjunction with methods of statistical mechanics for simulations of transition metal alloys both in the bulk and at surfaces.A fully relativistic generalization of the exact muffin-tin orbitals (EMTO) method has been developed. READ MORE

  7. 5. Nonlinear Interaction Between Ultrasonic Waves and Cracks and Interfaces

    Author : Milan Poznic; Leif Kari; Bruce Drinkwater; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ultrasonic waves; crack; modulation; rough interface; partially closed; surface-breaking; fluid-filled; Acoustics; Akustik;

    Abstract : The subject of this thesis is the development of new ultrasound inspection techniques for detection of cracks that are smaller than the wavelength of the inspecting wave and the characterization of cracks in fluid-filled pipes as either surface-breaking or subsurface. The spectrum of the scattered field of a partially closed crack comprises harmonic components not expected to be found in the case of linear scatterers such as pores or inclusions. READ MORE