Search for dissertations about: "Roger Persson"

Found 4 swedish dissertations containing the words Roger Persson.

  2. 1. Coordination of Phosphine-Thioether Ligands to Low-valent Metal Centers

    Author : Roger Persson; Kemisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; polynuclear metal complexes; fluxional behavior; cluster; thioether; phosphine; crystal structure; sulfur; triosmium;

    Abstract : The reactivity of the phosphine-thioether ligands bis(2-diphenylphosphino) ethylthio)ethane (PSSP), bis(2-(diphenylphosphino) ethyl)sulfane (PSP), PPh2CH2CH2SMe (PS), PPh2(o-C6H4SMe (PortoS), and PPh(o-C6H4SMe)2 (PSS) towards low-valent carbonyl clusters has been studied. In all structurally characterized clusters, the ligand donor atoms are terminally coordinated. READ MORE

  4. 2. Trait anxiety as a determinant of psychological test results

    Author : Roger Persson; Institutionen för psykologi; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Medicine human and vertebrates ; Environmental health; industrial medicine; Occupational health; work stress; toxic encephalopathy; symptom reporting; neuropsychological testing; organic solvents; repression; psychological methods; social desirability; anxiety; Personality traits; Medicin människa och djur ; Miljömedicin; arbetsmiljömedicin; Yrkesmedicin;

    Abstract : This thesis deals with the problem of interpreting test scores. The intention has been to explore and elucidate the effects of trait anxiety on test scores that have been obtained in applied research settings. READ MORE

  5. 3. Psychobiological functioning in mid-adolescent girls and boys : Linkages to self reported stress, self-esteem and recurrent pain

    Author : Lisa Folkesson Hellstadius; Petra Lindfors; Laura Ferrer-Wreder; Roger Persson; Stockholms universitet; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Adolescents; Cortisol; Alpha-amylase; Stress; Self-esteem; Recurrent pain; Psychology; psykologi;

    Abstract : Among adolescents, the day-to-day functioning of the hypothalamo-pituitary-adrenal-axis (HPA-axis) and of the autonomic nervous system (ANS) and their relationships with stress, subjective health complaints and psychological factors such as self-esteem, studied in naturalistic settings, have been largely unexplored. This thesis aimed to investigate the diurnal activity of the HPA-axis (Studies I & II) in terms of salivary cortisol and the ANS/SNS system (Study III) in terms of salivary alpha-amylase (sAA) in mid-adolescent girls and boys. READ MORE

  6. 4. On Active Secondary Suspension in Rail Vehicles to Improve Ride Comfort

    Author : Anneli Orvnäs; Sebastian Stichel; Rickard Persson; Roger Goodall; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rail vehicle; active secondary suspension; ride comfort; sky-hook damping; H∞ control; multi-body simulations; on-track tests; Järnvägsgruppen - Gröna tåget; Järnvägsgruppen - Gröna tåget; Järnvägsgruppen - Fordonsteknik; Järnvägsgruppen - Fordonsteknik;

    Abstract : One way to make rail vehicles a competitive means of transportation is to increase running speed. However, higher speeds usually generate increased forces and accelerations on the vehicle, which have a negative effect on ride comfort. With conventional passive suspension, it may be difficult to maintain acceptable passenger comfort. READ MORE