Sökning: "Spatial infinity"

Hittade 4 uppsatser innehållade orden Spatial infinity.

  1. 1. Electrodynamic field at spatial infinity

    Master-uppsats, KTH/Fysik

    Författare :Jakob Myhrman; [2022]
    Nyckelord :Spatial infinity; Conformal rescaling; Minkowski space; Penrose Diagram; Einstein universe; Newman-Penrose formalism; Sigma-process; Resolution of singularities; Maxwell s equations; Cylinder at spatial infinity; Rumslig oändlighet; Konform omskalning; Minkowski rummet; Penrose Diagram; Einsteins universum; Newman-Penrose formalismen; Sigma-processen; Singularitetupplösning; Maxwells ekvationer; Cylindern vid rumslig oändlighet;

    Sammanfattning : The treatment of spatial infinity is one of the remaining major open problems in the theory of isolated self-gravitating systems. Especially when one wants to model scattering of gravitational radiation in spacetime. In this thesis the conformal theory is used to study simple electromagnetic fields, close to spatial infinity. LÄS MER

  3. 2. Åsars bildning och modellering av isälvar under äldre och yngre Dryas i Svealand

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Emilie Åström; [2020]
    Nyckelord :esker; channel ice stream; Weichsel; Dryas; flow accumulation; Svealand; åsar; isälvar; Weichsel; Dryas; flödesackumulation; Svealand;

    Sammanfattning : Sveriges geomorfologi har till största del bildats under den senaste glaciationens erosion och depositions processer. Vid denna glaciations avsmältning rann smältvattnet bort från glaciären i isälvarna genom tunnlar under inlandsisen. LÄS MER

  4. 3. Analysis of the finite length performance of spatially coupled convolutional codes

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Ardiana Osmani; Hector Moreno Trujillo; [2015]
    Nyckelord :Spatial coupling; convolutional codes; braided convolutional codes; parallel concatenated codes; spatially coupled parallel concatenated codes; spatially coupled braided convolutional codes; BCJR algorithm; Technology and Engineering;

    Sammanfattning : Error control coding is an essential part of any well-designed digital communication system. It has been used in structures to protect the information, by enabling reliable delivery of digital data over unreliable communication channels. Even though this is an old topic, enlisted by Shannon in the late 40's, a lot of research is still going on. LÄS MER

  5. 4. An experimental investigation of the relation between learning and separability in spatial representations

    Magister-uppsats, Institutionen för datavetenskap

    Författare :Louise Eriksson; [2001]
    Nyckelord :separability; integrality; similarity scaling; Minkowski metric; learning;

    Sammanfattning : One way of modeling human knowledge is by using multidimensional spaces, in which an object is represented as a point in the space, and the distances among the points reflect the similarities among the represented objects. The distances are measured with some metric, commonly some instance of the Minkowski metric. LÄS MER