Sökning: "Modulation Transfer Function"

Visar resultat 11 - 15 av 41 avhandlingar innehållade orden Modulation Transfer Function.

  1. 11. Digitally Enhanced Continuous-Time Sigma-Delta Analogue-to-Digital Converters

    Författare :Julian Garcia; Ana Rusu; Maurits Ortmanns; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; analogue-to-digital conversion; sigma-delta modulation; digital enhancement; continuous-time; multi-channel applications;

    Sammanfattning : The continuous downscaling of CMOS technology presents advantagesand difficulties for IC design. While it allows faster, denser and more energy efficient digital circuits, it also imposes several challenges which limit the performance of analogue circuits. LÄS MER

  3. 12. Cell and Gene Therapy for Parkinson's Disease: Therapeutic Effect and Modulation of Dyskinesias in the 6-OHDA Rat Model

    Författare :Thomas Carlsson; Brain Repair and Imaging in Neural Systems (BRAINS); []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; neuropsykologi; Pharmacological sciences; pharmacognosy; pharmacy; neurofysiologi; Medicin människa och djur ; Neurology; neuropsychology; neurophysiology; Neurologi; Medicine human and vertebrates ; Parkinson?s disease; Serotonin; Tyrosine hydroxylase; Ventral mesenchephalon; Motor behavior; L-DOPA; GTP cyclohydrolase 1; Gene therapy; Dyskinesias; Cell transplantation; Dopamine; toxicology; Farmakologi; farmakognosi; farmaci; toxikologi;

    Sammanfattning : The main pathological feature in Parkinson's disease is the progressive loss of dopamine neurons in the midbrain, which in turn leads to the appearance of motor deficits such as akinesia/bradykinesia (loss/slowness of movements), rigidity, postural imbalance and tremor. To this day, there is no cure for the disease, but there are medications to relieve the symptoms. LÄS MER

  4. 13. Supra-threshold hearing loss and wide dynamic range compression

    Författare :Henrik L Olsen; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Hearing impairment; compression; hearing aids; modulated noise; speech intelligibility; temporal resolution; modulation transfer function;

    Sammanfattning : Cochlear hearing loss leads to deficits in many perceptual aspects, including threshold elevation (loss of sensitivity), reduction of auditory dynamic range (loudness recruitment) and problems with resolving sounds (loss of supra-threshold hearing). An ongoing debate is whether assessment of the individual supra-threshold hearing provides information which is likely to have an important influence on clinical decisions on signal processing strategies. LÄS MER

  5. 14. The development of synthetic gene delivery systems

    Författare :Lars J Brandén; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :gene transfer; synthetic vector; gene therapy; Bioplex; PNA; NLS;

    Sammanfattning : This thesis describes a new platform technology. The technique is referred to as Bioplex (biological complex) in analogy with the nomenclature for other transfection reagents, since we attach biological functions to a nucleic acid complex via sequence-specific hybridisation. LÄS MER

  7. 15. Silicon Strip Detectors for Scanned Multi-Slit X-Ray Imaging

    Författare :Mats Lundqvist; KTH; []
    Nyckelord :x-ray; silicon strip detectors; mammography; multi-slit; scanned slit; edge-on;

    Sammanfattning : Digital imaging systems for medical applications must bebased upon highly efficient detectors to ensure low patientdose. This is particularly important in screening mammographybecause of the large number healthy women that is examined. Amammography system must also provide high spatial and contrastresolution. LÄS MER