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Visar resultat 1 - 5 av 35 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Predictable and Scalable Medium Access Control for Vehicular Ad Hoc Networks

    Författare :Katrin Sjöberg Bilstrup; Erik G. Ström; Elisabeth Uhlemann; Maria Kihl; Högskolan i Halmstad; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CSMA; self-organizing TDMA; STDMA; medium access control; MAC; vehicular ad hoc networks; VANET; vehicle-to-vehicle communications; V2V; V2X; IEEE 802.11p; WAVE; DSRC; ETSI ITS-G5; ISO CALM M5; real-time communications; scalability; traffic safety; cooperative system; Datatransmission; Datatransmission;

    Sammanfattning : This licentiate thesis work investigates two medium access control (MAC) methods, when used in traffic safety applications over vehicular ad hoc networks (VANETs). The MAC methods are carrier sense multiple access (CSMA), as specified by the leading standard for VANETs IEEE 802. LÄS MER

  3. 2. The photo-diary and follow-up appointment on the ICU: Giving back the time to patients and relatives. : A descriptive and interventional study

    Författare :Carl G Bäckman; Sten Walther; Folke Sjöberg; Lotti Orwelius; Lars Berggren; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Background: Patients on the ICU often spend a great deal of their time either unconscious or heavily sedated. When they return from the zone between life and death they are often in a state of confusion where dreams and delusions are intertwined with reality and it is not always easy to distinguish them apart. LÄS MER

  4. 3. Microbiota of the alimentary tract of children - implications for allergy and inflammatory bowel disease

    Författare :Fei Sjöberg; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; gut flora; child; oral flora; allergy; duodenum; inflammatory bowel disease; culture; T-RFLP; pyrosequencing;

    Sammanfattning : Allergy, which is the most common chronic disease in Swedish children and adolescents, is associated with a high standard of living and Western lifestyle. According to the hygiene hypothesis, allergy is due to inadequate stimulation of the immune system by microbes during early childhood, leading to failed maturation of the immune system. LÄS MER

  5. 4. Studies on cholesterol and bile acid metabolism in relation to plasma lipoproteins

    Författare :Beatrice Sjöberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The metabolism of cholesterol and bile acids is tightly controlled but only partially characterized. The liver is responsible for most of the clearance and catabolism of plasma cholesterol, and the hepatocyte expression of LDL receptors is central in this process. LÄS MER

  7. 5. High speed communication on twisted-pair wires and low complexity multiuser detectors

    Författare :Frank Sjöberg; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Sammanfattning : This thesis deals with two different topics: High speed communication on twisted pair wires (digital subscriber lines) and low complexity multiuser detectors. The major part of this thesis concerns a technique for high speed communication over the telephone network called Very high bit rate Digital Subscriber Line VDSL). LÄS MER