Sökning: "contrast dynamics"

Visar resultat 1 - 5 av 287 avhandlingar innehållade orden contrast dynamics.

  1. 1. Multi-Resistance Plasmids : Fitness Costs, Dynamics and Evolution

    Författare :Fredrika Rajer; Linus Sandegren; Pål Jarle Johnsen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; multi-resistance plasmids; evolution; fitness cost; dynamics; escherichia coli; ESBL; gene amplification; β-lactamase inhibitor; Biologi med inriktning mot mikrobiologi; Biology with specialization in Microbiology;

    Sammanfattning : Antibiotic resistance is an escalating problem, not only due to less desirable treatment options and outcome, but also due to the economic burden to health care caused by resistant pathogens. Since the process of developing new antibiotics is slow, we need to carefully consider the usage of the antibiotics still available. LÄS MER

  3. 2. Cardiovascular fluid dynamics : methods for flow and pressure field analysis from magnetic resonance imaging

    Författare :Tino Ebbers; Håkan Arheden; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Cardiovascular blood flow is highly complex and incompletely understood. Blood flow patterns are expected to influence the opening and closing of normal and prosthetic heart valves, the efficiency of cardiac filling and ejection, and the resistance to thrombus formation within the heart. LÄS MER

  4. 3. Burden Dynamics and Fragmentation

    Författare :Nikolaos Petropoulos; Zongxian Zhang; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och berganläggningsteknik;

    Sammanfattning : Drill and blast is a dominant technique in several surface and underground mines in the world. The purpose of this technique is to break rock mass into fragments, which can be handled by mining equipment. The identified major influencing factors in rock blasting are stress waves and gas pressurization. LÄS MER

  5. 4. Stepfamily Dynamics in Sweden : Essays on family structure and children’s well-being

    Författare :Jani Turunen; Elizabeth Thomson; Livia Oláh; Frank F. Jr. Furstenberg; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Stepfamily; family structure; child well-being; sociologisk demografi; Sociological Demography;

    Sammanfattning : This thesis investigates different aspects of family structure and children’s well-being in Sweden. Applying a child perspective, it analyzes children’s likelihood of stepfamily entry, their emotional well-being in different family forms and educational outcomes in families with complex sibling structures. LÄS MER

  7. 5. Analysis of ICP pulsatility and CSF dynamics : the pulsatility curve and effects of postural changes, with implications for idiopathic normal pressure hydrocephalus

    Författare :Sara Qvarlander; Anders Eklund; Jan Malm; Richard Birgander; Martin U Schuhmann; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cerebrospinal fluid; CSF dynamics; Intracranial pressure; Pulse pressure; Normal pressure hydrocephalus; Posture; Predictive tests; Mathematical modelling; Magnetic resonance imaging; Infusion tests;

    Sammanfattning : The volume defined by the rigid cranium is shared by the brain, blood and cerebrospinal fluid (CSF). With every heartbeat the arterial blood volume briefly increases and venous blood and CSF are forced out of the cranium, leading to pulsatility in CSF flow and intracranial pressure (ICP). LÄS MER