Sökning: "duality"

Visar resultat 11 - 15 av 187 avhandlingar innehållade ordet duality.

1. 11. The Quest for M-theory

   Författare :Ulf Gran; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; supersymmetry; solitons; gauge symmetry; M-theory; string theory; duality; p-branes; D-branes; superspace; supergravity;

   Sammanfattning : In ten dimensions, there exist five consistent string theories and in eleven dimensions there is a unique supergravity theory. When trying to find the fundamental theory of nature this is clearly an "embarrassment of riches". In the mid 90s, however, it was discovered that these theories are all related via a kind of transformation called duality. LÄS MER

3. 12. The Duality of Tactical Thought : A Study of how Swedish Land Forces’ Commanders view Tactics in Irregular Warfare

   Författare :Michael Gustafson; Col Pasi Kesseli; Donald Broady; Torsten Björkman; Försvarshögskolan; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Bourdieu; military thought; tactics; Irregular Warfare; Multiple Correspondence Analysis; field theory; sociology; War Studies; Krigsvetenskap; Krigsvetenskap;

   Sammanfattning : This is a sociological study of the views of officers in the Swedish Army and its Amphibious Forces on tactics in Irregular Warfare (IW), in particular, Counterinsurgency (COIN). IW comprises struggles, where the military weaker part uses an indirect approach with smaller units and integrates the civilian and military dimensions in a violence spectrum including subversion, terrorism, Guerrilla Warfare and infantry actions. LÄS MER

4. 13. Adaptive finite element methods for multiphysics problems

   Författare :Fredrik Bengzon; Mats Larson; Harald van Brummelen; Umeå universitet; []
   Nyckelord :finite element methods; multiphysics; a posteriori error estimation; duality; adaptivity; discontinuous Galerkin; fractional step methods;

   Sammanfattning : In this thesis we develop and analyze the performance ofadaptive finite element methods for multiphysics problems. Inparticular, we propose a methodology for deriving computable errorestimates when solving unidirectionally coupled multiphysics problemsusing segregated finite element solvers. LÄS MER

5. 14. On Computational Contact and Fracture Mechanics

   Författare :Per Heintz; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FEM; Lagrange multipliers; stabilization; contact formulations; duality; adaptivity; error estimation;

   Sammanfattning : .... LÄS MER

7. 15. On the Finite Element Method for the Time-Dependent Ginzburg-Landau Equations

   Författare :Johan Ivarsson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; discontinuous Galerkin method; a posteriori error estimate; adaptive finite element method; duality; residual; Ginzburg-Landau equations; superconductivity; residual;

   Sammanfattning : This thesis is primarily concerned with various issues regarding finite element approximation of the time-dependent Ginzburg-Landau equations. The time-dependent Ginzburg-Landau equations is a macroscopic, phenomenological model of superconductivity, consisting of a system of nonlinear, parabolic partial differential equations. LÄS MER