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Visar resultat 56 - 60 av 937 avhandlingar innehållade orden Karlstads Universitet..

1. 56. Embedding Theorems for Mixed Norm Spaces and Applications

   Författare :Robert Algervik; Viktor Kolyada; Javier Soria; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mixed norms; rearrangements; modulus of continuity; embeddings; Sobolev spaces; Besov spaces; Lorentz spaces; Mathematical analysis; Analys; Matematik; Mathematics;

   Sammanfattning : This thesis is devoted to the study of mixed norm spaces that arise in connection with embeddings of Sobolev and Besov type spaces. We study different structural, integrability, and smoothness properties of functions satisfying certain mixed norm conditions. Conditions of this type are determined by the behaviour of linear sections of functions. LÄS MER

3. 57. Embedding Theorems for Mixed Norm Spaces and Applications

   Författare :Robert Algervik; Viktor Kolyada; Lars-Erik Persson; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mixed norms; embeddings; rearrangements; anisotropic fractional Sobolev spaces; anisotropic Besov spaces; mixade normer; inbäddningar; omarrangeringar; anisotropa fractionära Sobolev rum; anisotropa Besov rum; MATHEMATICS; MATEMATIK; Matematik; Mathematics;

   Sammanfattning : This thesis is devoted to the study of mixed norm spaces that arise in connection with embeddings of Sobolev and Besov type spaces. The work in this direction originates in a paper due to Gagliardo (1958), and was continued by Fournier (1988) and by Kolyada (2005). We consider fully anisotropic mixed norm spaces. LÄS MER

4. 58. Extended Mercerization Prior to Carboxymethyl Cellulose Preparation

   Författare :Heléne Almlöf; Ulf Germgård; Björn Kreutz; Monica Ek; Karlstads universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Carboxymethyl cellulose; Mercerization; DS; FT Raman spectroscopy; Filtration ability; Chemical engineering; Kemiteknik; Chemical Engineering; Kemiteknik;

   Sammanfattning : Carboxymethyl cellulose (CMC) is produced commercially in a two-stage process consisting of a mercerization stage, where the pulp is treated with alkali in a water alcohol solution, followed by an etherification stage in which monochloroacetic acid is added to the pulp slurry. In this thesis an extended mercerization stage of a spruce ether pulp was investigated where the parameters studied were the ratio of cellulose I and II, concentration of alkali, temperature and retention time. LÄS MER

5. 59. New Techniques for Sample Preparation in Analytical Chemistry

   Författare :Zeki Altun; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; Kemi; Chemistry;

   Sammanfattning : Sample preparation is often a bottleneck in systems for chemical analysis. The aim of this work was to investigate and develop new techniques to address some of the shortcomings of current sample preparation methods. LÄS MER

7. 60. De sobremesa 1887-1896 : José Asunción Silva:El poeta novelista

   Författare :Pilar Alvarez; Karlstads universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Latin American modernismo; modernism; fragmentation; structure; genre; referentiality; narratology; author; narrator; narratee; reader; unity; assimilation; contrast; parallelism; correspondence; association; Spanska; Spanish; Spanish and Portuguese language and literature; Portugisiska och spanska språk och litteratur ;

   Sammanfattning : José Asunción Silva is a Colombian poet most known for having renewed the metrics in Spanish poetry during the 19th century. José Asunción Silva's only novel, De sobremesa 1887-1896 [After dinner, 1887-1896] written in 1896 is a significant and representative modernist novel in the tradition of Latin-American modernismo. LÄS MER