Sökning: "spectrum"

Visar resultat 16 - 20 av 1905 avhandlingar innehållade ordet spectrum.

1. 16. Enterobacteriaceae Producing Extended-Spectrum Beta-Lactamases : Aspects of Detection, Epidemiology and Control

   Författare :Birgitta Lytsy; Åsa Melhus; Dan Andersson; Håkan Hanberger; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Extended-spectrum beta-lactamase; ESBL; pulse-field gel elctrophoresis; typing methods; infection control; typningsmetoder; vårdhygien; Bacteriology; Bakteriologi; Clinical Bacteriology; Klinisk bakteriologi;

   Sammanfattning : Enterobacteriaceae belong to the normal enteric flora in humans and may cause infections. Escherichia coli is the leading urinary tract pathogen with septicaemic potential, whereas Klebsiella pneumoniae causes opportunistic infections and often outbreaks in hospital settings. LÄS MER

3. 17. Description and measurement of sensory symptoms in autism spectrum

   Författare :Marie Elwin; Lars Kjellin; Agneta Schröder; Agneta Nydén; Örebro universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Autism spectrum; sensory; perception; qualitative research; scale development; scale validation; sensory clusters; Medicin; Medicine;

   Sammanfattning : Unusual responses to sensory stimuli have been reported in nearly all children with autism spectrum conditions (ASC). A few studies on adults indicate that the sensory and perceptual problems persist into adulthood. LÄS MER

4. 18. Autism Spectrum Disorders: cognitive aspects and preventions

   Författare :Åsa Lundholm-Hedvall; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; autism spectrum disorders; cognition; intervention; children;

   Sammanfattning : Aim: The overarching aims of this thesis were to (a) gain further insight into the developmental/cognitive aspects of autism spectrum disorders (ASD) in young children, and (b) assess outcome after interventions of varying intensity. Methods: In a prospectively designed longitudinal naturalistic study, 208 preschool children with ASD were comprehensively assessed - including with a variety of cognitive tests and other structured neurodevelopmental/adaptive interviews, observation schedules and questionnaires - before start of intervention and at the end of intervention after two years. LÄS MER

5. 19. Spectrum Sensing for Cognitive Radio

   Författare :Inna Valieva; Krister Landernäs; Mälardalens universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; elektronik; Electronics;

   Sammanfattning : This work focuses on the improvement of spectrum utilization by evaluating and proposing a subset of radio scene analysis algorithms for opportunistic spectrum access deployment in a cognitive radio network. The proposed algorithms aim to solve two problems: detecting vacant frequency channels and estimating the waveform, including modulation type, symbol rate, and central frequency. LÄS MER

7. 20. Algebras of bounded holomorphic functions

   Författare :Anders Fällström; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; holomorphic function; bounded holomorphic function; domain of holomorphy; envelope of holomorphy; Gleason’s problem; convex set; uniform algebra; spectrum; fibers; generalized Shilov boundary; analytic structure; plurisubharmonic function;

   Sammanfattning : Some problems concerning the algebra of bounded holomorphic functions from bounded domains in Cn are solved. A bounded domain of holomorphy Q in C2 with nonschlicht i7°°- envelope of holomorphy is constructed and it is shown that there is a point in Q for which Gleason’s Problem for H°°(Q) cannot be solved. LÄS MER