Search for dissertations about: "Ulf Jonsson"

Showing result 1 - 5 of 35 swedish dissertations containing the words Ulf Jonsson.

  1. 1. Elastohydrodynamic lubrication and lubricant rheology in refrigeration compressors

    Author : Ulf Jonsson; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Abstract : The introductory chapter gives a general description of the lubrication of rolling element bearings in refrigeration compressors and rheological properties of oil-refrigerant mixtures. The influence of refrigerants on the viscosity, pressure-viscosity coefficient and film forming ability in a EHD-contact is described. READ MORE

  2. 2. Foundations for knowing God : Bernard Lonergan's foundations for knowledge of God and the challenge from antifoundationalism

    Author : Ulf Jonsson; Uppsala universitet; []
    Keywords : HUMANITIES; HUMANIORA; HUMANIORA; HUMANITIES; Religion; B Lonergan; knowledge of God; foundationalism; antifoundationalism; cognitional theory; epistemic justification; transcendental method; basic beliefs; religious experience; Aquinas; Aristotle; H Putnam; R Rorty; Religionsvetenskap Teologi; Religion Theology; Religionsvetenskap Teologi; Philosophy of Religion; religionsfilosofi;

    Abstract : This study deals with the theory of knowledge of God elaborated by the Canadian theologian and philosopher Bernard Lonergan (1904-1984). Lonergan's theory of knowledge of God, or his "philosophy of God", has already been the subject-matter of a number of doctoral dissertations. READ MORE

  3. 3. Lubricant rheology in refrigeration systems and magnetic storage devices

    Author : Ulf Jonsson; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Abstract : This thesis comprises three papers concerning lubricant rheology in two different applications. The first two papers concern refrigeration systems and the importance of lubricant rheology in elastohydrodynamic lubrication in refrigerating compressors. READ MORE

  4. 4. Adolescents with Depression Grown up : Education, Intimate Relationships, Mental Health, and Personality

    Author : Ulf Jonsson; Anne-Liis von Knorring; Lars von Knorring; Gunilla Olsson; Maria Levander; Uppsala universitet; []
    Keywords : Adolescent depression; Follow-up; Higher education; Childbearing; Intimate relationships; Recurrent depression; Personality development; Neuroticism; Social outcome; Community sample; MEDICINE; MEDICIN; Psykiatri; Psychiatry;

    Abstract : Unipolar depression, estimated to be the leading contributor to burden of disease in middle- and high-income countries, often has an onset in adolescence. The disorder is associated with substantial role impairment and is highly recurrent. This raises questions about both subsequent mental health and social outcome. READ MORE

  5. 5. Detecting Inclusions in a Silicone Rubber Phantom Using Standing Lamb Waves and Multiple Frequency Footprints

    Author : Ulf G Jonsson; Britt Andersson; Olof A Lindahl; Jacques Ohayon; Umeå universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Piezoelectric; Silicone rubber; Impedance; Resonance; Lamb waves; Phantom; Electronics; elektronik;

    Abstract : The thesis deals with one major question: is it possible, using one piezoelectric sensor/vibrator, to detect a hard inclusion in a silicone rubber phantom? The question was approached with an open mind and the task was subdivided into three clearly identifiable parts: characterization of the piezoelectric sensor/vibrator (paper I), creating a model of the visco-elastic properties of a tissue-like material (phantom) in contact with the sensor/vibrator (paper II), and to detect the presence of a hard inclusion in the phantom (paper III). All vibrations of the sensor/vibrator and phantom was modeled using a finite element method (FEM). READ MORE