Essays about: "formalism"

Showing result 16 - 20 of 135 essays containing the word formalism.

  1. 16. Void Evolution and Cosmic Star Formation

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Joel Wasserman; [2023]
    Keywords : Void; Void Evolution; Cosmic Void; Star Formation Rate; Star Formation History; Cosmic Star Formation; Cosmology; Spherical Evolution Model; SvdW; Vdn; Excursion Set Theory; Excursion Set Formalism; Astrophysics; Astronomy; Cosmic Web; Matter Transfer; Tomrum; Tomrumsutveckling; Kosmiska Tomrum; Stjärnbildningshastighet; Stjärnbildningshistorik; Kosmisk stjärnbildning; Kosmologi; Sfärisk Evolutionsmodell; SvdW; Vdn; Exkursionsset teori; Exkursionsset Formalism; Astrofysik; Astronomi; Kosmiska Spindelnätet; Masstransport;

    Abstract : The rate at which stars have formed throughout the history of theuniverse is not constant, it started out slow, increased until around redshift ∼ 2 when it reversed and became slower again. The reason for this behaviour is still being investigated with various models and simulations usually based upon dark matter halos. READ MORE

  3. 17. Scattering of Charge Carriers in 2+1-Dimensional Quantum Field Theory

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : David Savinainen; [2023]
    Keywords : Quantum field theory; Scattering; S-matrix; Hannesdottir; Schwartz;

    Abstract : The aim of this thesis is to examine the hard $S$-matrix for QED and QCD, due to Hannesdottir and Schwartz [1], both recreating known results, and finding new results in lower dimensions. Electrons by themselves are not gauge invariant, and in the massless limit do not give finite $S$-matrix elements for individual processes; one needs to add together seemingly arbitrary combinations of diagrams in order to be able to calculate the scattering cross-section. READ MORE

  4. 18. Generating corpora of semantic graphs based on graph extension grammar

    University essay from Umeå universitet/Institutionen för datavetenskap

    Author : Eric Andersson; [2023]
    Keywords : ;

    Abstract : This thesis introduces the tool Lovelace which is used to generate corpora of semantic graphs to investigate which functionalities and design- as well as implementation aspects are important in a corpus generator. Lovelace uses the graph grammar formalism graph extension grammar (GEG) to generate these corpora. READ MORE

  5. 19. Lost in translation : investigating challenges of picturing landscape experience

    University essay from SLU/Dept. of Urban and Rural Development

    Author : Rasmus Rinaldo; [2023]
    Keywords : Landscape representation; visualization; digital pictures; aesthetic experience; arts-based method;

    Abstract : The versatile qualities of the drawing medium, from analogue sketches to digital production, makes visual depiction a much used tool in architecture and design because of its ability to communicate ideas, proposals and visions. However, depicting landscape experiences in a picture is claimed to be difficult. READ MORE

  6. 20. Generating Perturbative Solutions for Slowly Rotating Perfect Fluids Using the Hartle Scheme

    University essay from Umeå universitet/Institutionen för fysik

    Author : Elin Johansson; [2023]
    Keywords : ;

    Abstract : In this thesis, we study slowly rotating relativistic stars by modeling them as perfect fluids. The Hartle formalism is used to perturb a spherically symmetric static solution into slow rotation and the corresponding field equations to second order are presented. READ MORE