Sökning: "Kerstin Pettersson"

Visar resultat 6 - 10 av 20 avhandlingar innehållade orden Kerstin Pettersson.

  1. 6. Strong n-generators in some one-dimensional domains

    Författare :Kerstin Pettersson; Daniel D Anderson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MATHEMATICS; MATEMATIK; matematik; Mathematics;

    Sammanfattning : Let R be a commutative Noetherian one-dimensional domain such that each ideal in R can be generated by n elements. A strong n-generator in R is an element r which can be chosen as one of n generators for each ideal in which it is contained. LÄS MER

  3. 7. Risk of hearing loss from combined exposure to hand-arm vibrations and noise

    Författare :Hans Pettersson; Lage Burström; Tohr Nilsson; Kerstin Persson Waye; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Hearing loss; noise; hand-arm vibration; combined exposure; vibration induced white fingers; Raynaud s phenomenon; Occupational and Environmental Medicine; arbets- och miljömedicin;

    Sammanfattning : Hearing loss from noise exposure is one of the most common occupational injuries, and exposure to vibrations may increase the risk of noise-induced hearing loss. Earlier cross-sectional and longitudinal studies found an increased risk of noise-induced hearing loss among workers with vibration-induced white fingers (VWF) symptoms compared to workers without such symptoms. LÄS MER

  4. 8. Individualized Mathematics Instruction for Adults : The Prison Education Context

    Författare :Linda Marie Ahl; Kerstin Pettersson; Paola Valero; Lena Lindenskov; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Individualized Instruction; Mathematics; Prison Education; Adults; Tutoring; matematikämnets didaktik; Mathematics Education;

    Sammanfattning : Individualized instruction tailors content, instructional technology, and pace to the abilities and interests of each student. Carrying out individualized instruction for adults returning to mathematics after some years away from schooling entail special challenges. LÄS MER

  5. 9. Obstacles to students' learning of the limit concept : A comparative study

    Författare :Abraham Kumsa Beyene; Kerstin Pettersson; Iben Christiansen; Juter Kristina; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Obstacles; limit; calculus; case study; comparative study; upper secondary; Mathematics Education; matematikämnets didaktik;

    Sammanfattning : This thesis explores obstacles to students’ learning of the limit of a function as students learn the concept in post-compulsory schools in two culturally different contexts, namely Sweden and Ethiopia. The study investigates obstacles to students’ learning of the intuitive limit concept (the limit concept that is based on the intuitive definition) taught in upper secondary schools of these two contexts and characterises the nature of these obstacles. LÄS MER

  7. 10. The accessibility paradox : Everyday geographies of proximity, distance and mobility

    Författare :Katarina Haugen; Kerstin Westin; Einar Holm; Örjan Pettersson; David Banister; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Accessibility; proximity; distance; daily mobility; everyday life; residential conditions; spatial structure;

    Sammanfattning : This thesis aims to explore the importance of proximity and mobility, respectively, for individuals’ accessibility, as well as the relationship between these two key spatial dimensions of accessibility in the context of everyday life. The thesis is based upon three empirical research papers which focus on accessibility-related preferences, actual accessibility conditions, and travel patterns. LÄS MER