Search for dissertations about: "guidance mechanism"

Showing result 1 - 5 of 36 swedish dissertations containing the words guidance mechanism.

  2. 1. On Derailment-Worthiness in Rail Vehicle Design : Analysis of vehicle features influencing derailment processes and consequences

    Author : Dan Brabie; Evert Andersson; Roderick A Smith; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; derailment; bogie design; wheel-sleeper impact; simulation; deviation; vehicle inter-connection; guidance mechanism; substitute guidance; articulated train; railway safety; Vehicle engineering; Farkostteknik;

    Abstract : This thesis aims at systematically studying the possibilities of minimizing devastating consequences of high-speed rail vehicle derailments by appropriate measures and features in the train design including the running gear. Firstly, an empirical database is established containing as much relevant information as possible of past incidents and accidents that have occurred at substantial running speeds due to mechanical failure close to the interface between the running gear and the track. READ MORE

  4. 2. The importance of astroglial cells in ischemia, regeneration and angiogenesis

    Author : Andrea Lundkvist; Göteborgs universitet; []
    Keywords : astrocytes; Müller cells; retina; intermediate filaments; GFAP; vimentin; angiogenesis; VEGF-A; guidance; matrix-metalloprotease;

    Abstract : Astrocytes in the CNS communicate with both neurons and blood vessels. In many CNS pathologies, astrocytes respond by becoming reactive. Whether their performance at this stage is beneficial or detrimental for CNS function is unclear. READ MORE

  5. 3. Tumor angiogenesis. Regulation of mural cell recruitment and endothelial sprouting

    Author : Alexandra Abramsson; Göteborgs universitet; []
    Keywords : Angiogenesis; tumor; retina; PDGF; VEGF; platelet-derived growth factor; guidance; vascular endothelial growth factor.;

    Abstract : The formation of new blood vessels is an inherent part of many physiological and pathological processes. Currently, there is a strong hope pathological situations like stroke, diabetic retinopathy and cancer may be affected by pharmacological regulators of blood vessel formation. READ MORE

  6. 4. Axon Guidance and Morphogenesis of the C. elegans Pharynx

    Author : Manish Rauthan; Chalmers tekniska högskola; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; pharynx; M2; C. elegans; extra-cellular matrix ECM ; hex; Krüppel; pha-2; isthmus; NSM; pharyngeal neurons.; cytoskeleton; mnm-2;

    Abstract : The C. elegans pharynx is a single cell thick muscular tube that undergoes morphogenesis to attain it mature structure from a ball of 80 undifferentiated cells. This thesis is about understanding the mechanisms and the genetic pathways underlying the process of pharyngeogenesis. READ MORE

  7. 5. Essays on individual-level wage stickiness and forward guidance

    Author : Magnus Åhl; Per Krusell; Luca Dedola; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; nationalekonomi;

    Abstract : Wage stickiness and household heterogeneitySince long, it has been recognized that wage frictions provide realism to, and improve the properties of, macroeconomic models. Recently, another element of realism has generated a large macroeconomic literature: the addition of household heterogeneity, especially through uninsurable idiosyncratic risk on the level of worker productivity. READ MORE