Sökning: "mask"

Visar resultat 21 - 25 av 169 avhandlingar innehållade ordet mask.

  1. 21. Barns psykologiska reaktioner på användning av andningsskydd

    Författare :Eva Mauritzson-Sandberg; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Psychology; Teknisk psykologi;

    Sammanfattning : Research on psychological reactions on wearing respiratory protective devices (RPDs) has been initiated only recently. Knowledge about children's psychological reactions is still lacking. The aim of the thesis was therefore to provide such knowledge in connection with the design of RPDs for use by children in chemical accidents and warfare. LÄS MER

  3. 22. Newborn respiratory support using distending pressure : the effect of interfaces and system design on performance and outcome

    Författare :Sonja Baldursdottir; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Preterm infants often require respiratory support after birth due to lung immaturity. The preferred method of providing respiratory support to breathing infants in respiratory distress is non-invasively with continuous positive airway pressure (CPAP). LÄS MER

  4. 23. Resistance breathing with PEP and CPAP : effects on respiratory parameters

    Författare :Maria Sehlin; Ola Winsö; Karin Wadell; Fredrik Öhberg; Monika Fagevik Olsèn; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Chest physiotherapy; breathing exercises; PEP; CPAP; airway pressure; airflow; threshold resistor; flow resistor; inspiratory capacity; Borg CR10;

    Sammanfattning : Background: Positive expiratory pressure (PEP) and continuous positive airway pressure (CPAP) are two forms of resistance breathing used in spontaneously breathing patients. With a threshold resistor or a flow resistor, both PEP and CPAP provide a positive (elevated) pressure level during the expiratory phase. LÄS MER

  5. 24. Peak and Power Reduction in Multicarrier Communication Systems

    Författare :Niklas Andgart; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telekommunikationsteknik; line driver; Signal processing; Signalbehandling; Telecommunication engineering; power reduction; DSL; DMT; tone reservation; PAR; Peak to average ratio;

    Sammanfattning : Broadband multicarrier communication suffers from a large signal span, causing problems in both wireless and wireline systems. This is commonly referred to as a high peak to average ratio (PAR), and leads to a high power consumption, which is an important limitation in many communication systems. LÄS MER

  7. 25. Encierro y sustitución en El obsceno pájaro de la noche de José Donoso

    Författare :Hector Areyuna Villalobos; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Donoso; José 1924-1996; El obsceno pájaro de la noche;

    Sammanfattning : The novel El obsceno påjaro de la noche ( The Obscene Bird of Night) (1970) by José Donoso is considered to be essentially governed by two semantic isotopies: the Enclosure and the Substitution. The Substitution is a consequence of the Enclosure, which is manifested as a reaction to the inhibitive effect of the Enclosure; in this way the polarity between these two governing isotopies generates a dynamic which permits both the development of the story and its interpretative coherence. LÄS MER