Search for dissertations about: "David Fields"

Showing result 1 - 5 of 53 swedish dissertations containing the words David Fields.

  2. 1. Synthetic Functionalities for Ion and Electron Conductive Polymers : Applications in Organic Electronics and Biological Interfaces

    Author : Tobias Abrahamsson; Magnus Berggren; Daniel Simon; Mikhail Vagin; David Bliman; Roger Gabrielsson; David Mecerreyes; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In the search for understanding and communicating with all biological systems, in humans, animals, plants, and even microorganisms, we find a common language of all communicating via electrons, ions and molecules. Since the discovery of organic electronics, the ability to bridge the gap and communicate be-tween modern technology and biology has emerged. READ MORE

  4. 2. Validation and application of objective measures of obesity and physical activity : studies in pregnant and non-pregnant adults and in infants

    Author : Anna Gradmark; Paul W Franks; David Fields; Umeå universitet; []
    Keywords : physical activity; validation; body composition; abdominal adipose tissue; methods; accelerometer; pregnancy; insulin sensitivity; offspring;

    Abstract : Background Excess adipose tissue and low physical activity are two major determinants for chronic diseases such as type 2 diabetes and cardiovascular disease.  Understanding these relationships requires accurate and precise measures of body composition and physical activity, and most existing observational studies lack such measures. READ MORE

  5. 3. Models and Methods for Random Fields in Spatial Statistics with Computational Efficiency from Markov Properties

    Author : David Bolin; Matematisk statistik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; random fields; Gaussian Markov random fields; Matérn covariances; stochastic partial differential equations; Computational efficiency;

    Abstract : The focus of this work is on the development of new random field models and methods suitable for the analysis of large environmental data sets. A large part is devoted to a number of extensions to the newly proposed Stochastic Partial Differential Equation (SPDE) approach for representing Gaussian fields using Gaussian Markov Random Fields (GMRFs). READ MORE

  6. 4. Hot and Dense Gauge Theories with External Fields

    Author : David Persson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In the introductory part of this thesis, I briefly review quantum statistichal mechanics; quantum field theory with external fields; the real and imaginary time formalisms in thermal field theory; and the hard thermal loop resummation. In the second part, consisting of here reprinted research articles, we apply this to quantum electrodynamics and quantum chromodynamics with a background (chromo-) magnetic field in the presence of a heat and charge reservoir. READ MORE

  7. 5. Finite temperature and density QED with external fields

    Author : David Persson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; magnetic; chemical potential; effective action; density; finite temperature; relativistic fermion gas; QED;

    Abstract : .... READ MORE