Sökning: "DAT"

Visar resultat 1 - 5 av 39 avhandlingar innehållade ordet DAT.

  1. 1. Thermal conductivity of AlXGa1-XN and β-Ga2O3 semiconductors

    Författare :Dat Tran; Plamen Paskov; Vanya Darakchieva; Mattias Thorshell; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : For the high-power (HP) electronic applications the existing Si-based devices have reached the performance limits governed by the material properties. Hence the device innovation itself is unable to enhance the overall performance. LÄS MER

  3. 2. Foreign molecules in biomembranes : Molecular effects on intact stratum corneum and model lipid systems

    Författare :Quoc Dat Pham; Fysikalisk kemi; []
    Nyckelord :stratum corneum; lipid; keratin filament; protein; DMPC; penetration enhancer; osmolyte; solvent; monoterpene; fatty acid; hydration; molecular mobility; fluidity; permeability; PT ssNMR; diffusion cell;

    Sammanfattning : This thesis mainly explores how the molecular mobility of lipid and protein components in the outermost layer of the skin, the stratum corneum (SC), varies with different conditions and upon adding foreign compounds. These studies require methods that makes it possible to detect and characterize the minor amount of fluid components in the highly ordered solid SC sample with resolved molecular information. LÄS MER

  4. 3. Thermal conductivity of wide and ultra-wide bandgap semiconductors

    Författare :Dat Tran; Plamen Paskov; Vanya Darakchieva; Martin Kuball; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; III-nitrides; β-Ga2O3; Thermal conductivity; Thermal transport;

    Sammanfattning : This PhD thesis presents experimental and theoretical studies of the thermal conductivity of wide and ultra-wide bandgap semiconductors including GaN, AlN, β-Ga2O3 binary compounds, and AlxGa1−xN, ScxAl1−xN, YxAl1−xN ternary alloys. Thermal conductivity measurements are conducted using the transient thermoreflectance (TTR) technique and the results are interpreted using analytical models based on the solution of the Boltzmann transport equation (BTE) within the relaxation time approximation (RTA). LÄS MER

  5. 4. On the influence of dopamine-related genetic variation on dopamine-related disorders

    Författare :Olle Bergman; Göteborgs universitet; []
    Nyckelord :dopamine; neurodevelopment; amygdala; schizophrenia; Parkinson s disease; social anxiety disorder; ADHD; PITX3; LMX1A; LMX1B; BDNF; DAT; SNP; genes; genetics; BDNF;

    Sammanfattning : Rationale: Dopamine synthesizing neurons are involved in a wide variety of functions. The most prominent dopamine pathways originate in the midbrain. The development, function and survival of these dopaminergic neurons are under the influence of numerous transcription and neurotrophic factors. LÄS MER

  7. 5. Assessment of attenuation correction methods for quantitative neuro-PET/MR

    Författare :Joao M. Sousa; Mark Lubberink; Lieuwe Appel; Håkan Ahlström; Mathias Engström; Ivo Rausch; Radiologi Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; PET; MRI; attenuation correction; 68Ge transmission; quantification; 11C-PE2I; MRAC; DAT; CBF; Medicinsk radiofysik; Medical Radiophysics;

    Sammanfattning : Hybrid PET/magnetic resonance (MR) can provide physiological, functional, and structural information simultaneously, facilitating research in neurological disorders. For quantitative PET, correction for photon attenuation (AC) is necessary. LÄS MER