Sökning: "kontrollsystem"

Visar resultat 11 - 15 av 39 avhandlingar innehållade ordet kontrollsystem.

  1. 11. MRI evaluation and image processing in gel dosimetry. A study of selected MRI properties and image processing in 3D gel dosimetry

    Författare :Peter Magnusson; Malmö Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Klinisk fysiologi; medical instrumentation; tomography; radiology; Clinical physics; image registering; multi-slice; slice profile; ferrous sulphate; polyacrylamide; 3D volume acquisition; RF field; B1 field; relaxation time; T1; T2; spin-echo; multi-spin-echo; stochastic noise; nonuniformity; SNR; radiologi; tomografi; medicinsk instrumentering; Radiopharmaceutical technology; Radiofarmaceutisk teknik; Physics; Fysik;

    Sammanfattning : Gel dosimetry is a new dosimetry method applied in radiation therapy. Gel dosimeters consist of a radiation sensitive gel, which can integrate absorbed doses from several radiation sources or beams. The dose to the gel can be evaluated by magnetic resonance imaging (MRI), a procedure that is the focus of the present thesis. LÄS MER

  3. 12. Auditory Distraction in ADHD : From Behaviour to the Brain

    Författare :Rina Blomberg; Jerker Rönnberg; Henrik Danielsson; David Badre; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Auditory distraction; Cognitive control; Attention; Working memory; ADHD; Auditiv distraktion; Kognitiv kontroll; Uppmärksamhet; Arbetsminne; Adhd;

    Sammanfattning : ADHD is a heterogenous disorder encompassing neurodevelopmental deficits in cognitive control. Auditory distraction is a common clinically reported symptom in ADHD, yet empirical research investigating the manifestation of auditory distraction in the disorder is remarkably scarce. LÄS MER

  4. 13. Study of a Large Deformable Mirror Concept

    Författare :Rikard Heimsten; Astronomi - Genomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Large deformable mirror - Adaptive optics - Distributed Control - Local control: actuator family - Faceplate: vibration modes - Faceplate: Dimensionless modal analysis;

    Sammanfattning : It is attractive to integrate a large deformable mirror for adaptive optics into an astronomical telescope rather than using relay optics within an auxiliary instrument. However, the resulting large deformable mirror can be expensive, particularly for extremely large telescopes. LÄS MER

  5. 14. Platelet-mediated inhibition of polymorphonuclear neutrophil apoptosis

    Författare :Jenny Larsson; Maurice B. Hallett; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Neutrophils play an important role in the cell-mediated immune response against invading micro-organisms. Upon infection, neutrophils in the bloodstream transmigrate into the tissue where they bind to and engulf the microbes. The infecting agent is then eliminated using reactive oxygen species (ROS) and proteolytic enzymes. LÄS MER

  7. 15. Efficient and Trustworthy Artificial Intelligence for Critical Robotic Systems

    Författare :Christopher Sprague; Petter Ögren; John Folkesson; Ivan Stenius; Todor Stoyanov; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; behaviour trees; hybrid dynamical systems; formal guarantees; optimal control; machine learning; autonomy; Datalogi; Computer Science;

    Sammanfattning : Critical robotic systems are systems whose functioning is critical to both ensuring the accomplishment of a given mission and preventing the endangerment of life and the surrounding environment. These critical aspects can be formally captured by convergence, in the sense that the system's state goes to a desired region of the statespace, and safety, in the sense that the system's state avoids unsafe regions of the statespace. LÄS MER