Search for dissertations about: "force density"

Showing result 1 - 5 of 275 swedish dissertations containing the words force density.

2. 1. Force measurements using scanning probe microscopy : Applications to advanced powder processing

   Author : Anders Meurk; KTH; []
   Keywords : atomic force microscope; AFM; SPM; van der Waals interaction; DLVO-theory; surface forces; colloidal probe; force curve; friction; adhesion; stick-slip; cantilever; calibration; spring constant; silicon nitride; iron; silica;

   Abstract : The object of this thesis is to apply scanning probemicroscopy (SPM) to the field of advanced powder processing.Measurement of interparticle surface forces at conditionsrelevant to ceramic processing has been performed together withthorough studies of powder friction. READ MORE

4. 2. van der Waals Density Functionals

   Author : Ylva Andersson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; van der Waals molecules; physisorption; van der Waals interactions; density-functional theory; exchange-correlation energy; scanning-force microscopy; adhesion;

   Abstract : Methods using local or semi local approximations (LDA, GGA etc.) for the exchange-correlation energy in the density-functional theory (DFT) do not include van der Waals interactions. READ MORE

5. 3. Alexandria: A General Drude Polarizable Force Field with Spherical Charge Density

   Author : Mohammad Mehdi Ghahremanpour; David Van der Spoel; Kresten Lindorff-Larsen; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Molecular mechanics; Force field; Drude oscillator model; Alexandria library; GROMACS; Physics with specialization in Biophysics; Fysik med inriktning mot biofysik;

   Abstract : Molecular-mechanical (MM) force fields are mathematical functions that map the geometry of a molecule to its associated energy. MM force fields have been extensively used for an atomistic view into the dynamic and thermodynamics of large molecular systems in their condensed phase. READ MORE

6. 4. The Force of Blood : Epidemiological studies of blood pressure in stroke, atrial fibrillation and primary care

   Author : Johan-Emil Bager; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; epidemiology; blood pressure; hypertension; stroke; myocardial infarction; atrial fibrillation; anticoagulants; LDL cholesterol; primary health care;

   Abstract : Aim: The overarching aim of this thesis was to investigate the prevalence, temporal trends and associations to cardiovascular outcomes of blood pressure levels in patients in Västra Götaland. Methods and findings: In Study I, Cox regression analysis was used to investigate associations between blood pressure and mortality in 799 patients with acute ischemic stroke who were identified in the quality register of a stroke ward at Sahlgrenska University Hospital. READ MORE

7. 5. Accurate Force Fields for Spectroscopic Studies of Protein–Ligand Interactions and Self-Assembly Structures

   Author : Yogesh Todarwal; Patrick Norman; Daniel Escudero; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular Dynamics Simulations; Force Field Parametrization; Density Functional Theory; Host-Guest Chemistry; Self-Assembly Systems; Neurodegenerative Diseases; Supramolecular Chemistry; Fluorescent Ligands; Oligothiophenes; Cyclonaphthodithiophene Diimides; Sulfonimidamide Organogelators; Helicenes.; Theoretical Chemistry and Biology; Teoretisk kemi och biologi;

   Abstract : The computational prediction of complex molecular behaviors is an essen- tial component of modern chemistry, as it provides a faster and more cost- effective way to explore molecular interactions that may be difficult or even impossible to study experimentally. Molecular dynamics (MD) simulations of- ten serve as a valuable tool for such predictions; however, their accuracy is inherently dependent on the force field (FF) parameters employed. READ MORE