Search for dissertations about: "screened"

Showing result 1 - 5 of 523 swedish dissertations containing the word screened.

  2. 1. First principles methods for electronic structure calculations of solids

    Author : Martin Springer; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; screened interaction; T-matrix; vertex function; GW approximation; Green function; density functional theory; gradient expansion; order N method; Physics; Fysik;

    Abstract : A straightforward gradient expansion of the exchange energy of a perturbed electron gas is performed. Studied perturbations range from very weak to those that produce, e.g., a silicon-like band structure with a band gap. READ MORE

  4. 2. Role of charge and spin fluctuations and their interplay in solids : A Green’s function approach

    Author : Tor Sjöstrand; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Green’s function; correlations; collective excitations; screened interaction; electric polarization; orbital and spin magnetization; magnon-phonon interaction; Fierz ambiguity; time-dependent exchange-correlation potential;

    Abstract : Due to the large number of electrons, solid state physics boils down to many-body approximations in which only selected types of collective excitations are taken into account, guided by the emergent properties of the material under study. In this thesis, the collective excitations of primary interest are electronic charge and spin fluctuations(plasmons and magnons) and nuclear charge fluctuations (phonons). READ MORE

  5. 3. Ophthalmological follow-up in young adults born premature and screened for retinopathy of prematurity

    Author : Dýrleif Pétursdóttir; Eva Larsson; Gerd Holmström; Marita Andersson Grönlund; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Long-term follow-up; prematurity; refraction; retinopathy of prematurity; strabismus; visual function; visual-motor integration; young adults; Ophtalmology; Oftalmiatrik;

    Abstract : Prematurely born children have a higher risk of ophthalmological and neurodevelopmental disorders than those born at term. There is a paucity of long-term prospective follow-up studies on the visual function of prematurely born adults. READ MORE

  6. 4. Solubility Modelling in Condensed Matter. Dielectric Continuum Theory and Nonlinear Response

    Author : Lars Sandberg; KTH; []
    Keywords : Dielectric saturation; modified Langevin-Debye theory; screened Coulomb potential; electrostriction; implicit solvation model; hydration free energy; hydrophobicity; partition coefficient; pKa; biomolecular titration.;

    Abstract : .... READ MORE

  7. 5. Dental Health Care Cooperating with Primary Health Care as a Resource in Early Case Finding of Patients with Diabetes or Hypertension

    Author : Sevek Engström; Kurt Svärdsudd; Christian Berne; Lars Gahnberg; Margareta Kristenson; Uppsala universitet; []
    Keywords : Screening; dental care; primary health care; high blood pressure; high blood glucose; Family Medicine; Allmänmedicin;

    Abstract : Objectives To investigate if there is an association between dental health status and high blood pressure, to test the effectiveness of screening for high blood pressure and high blood glucose performed by the dental health care in collaboration with primary health care and to investigate the direct costs for this type of screening organisation. Study population and methods In Paper I 54 subjects with known hypertension and 141 with a high blood pressure in the dental office were compared with matched controls. READ MORE