Sökning: "SSD"

Visar resultat 1 - 5 av 23 avhandlingar innehållade ordet SSD.

  1. 1. Self-Switching Diodes for Zero-Bias Terahertz Detection

    Författare :Andreas Westlund; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; self-switching diode; noise-equivalent power; SSD; graphene; zero-bias; InAs; InGaAs; terahertz; detector;

    Sammanfattning : The self-switching diode (SSD) has been investigated as a potential terahertz detector in recent years. The SSD accomplishes a non-linear current-voltage relation through a field-effect, which enables detection at zero bias from microwave up to terahertz frequencies. In this work, SSDs were realised in two new materials; InAs and graphene. LÄS MER

  3. 2. Mobility Management and Climate Change Policies

    Författare :Markus Robèrt; Folke Snickars; Tom Rye; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strategic Sustainable Development SSD ; Backcasting; Greenhouse gas emissions; Traffic planning; Company travel planning; Mobility Management; Civil engineering and architecture; Samhällsbyggnadsteknik och arkitektur;

    Sammanfattning : Globally, the transport system faces a paradigmatic shift where, in addition to increased local traffic problems, climate change and depletion of fossil oil reserves will foster a successive transition to renewable fuels and a need for more resource-efficient mobility management and communication alternatives. Foresighted countries, cities or companies taking the lead in adapting to these tougher conditions might well not only solve those problems, but also turn the problems into business advantages. LÄS MER

  4. 3. Subsyndromal depression hos äldre äldre personer

    Författare :Mikael Ludvigsson; Anna Milberg; Jan Marcusson; Lisa Ekselius; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Bakgrund: Subsyndromal depression (SSD) eller subklinisk depression är ett vanligt affektivt tillstånd som kan beskrivas som depressivitet under gränsen för vad som kallas syndromal eller egentlig depressiv episod. Förekomsten av SSD har rapporterats vara ungefär 10 % i populationen, eller ungefär 2-3 gånger högre än förekomsten av syndromal depression. LÄS MER

  5. 4. Subsyndromal Depression in Very Old Persons

    Författare :Mikael Ludvigsson; Anna Milberg; Jan Marcusson; Lisa Ekselius; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Background: Subsyndromal depression (SSD) or subthreshold depression is a common affective condition that can be described as depressiveness below the threshold of what is called a syndromal or a major depressive episode. The point prevalence for SSD has been reported to be about 10% in the community, or about two or three times higher than the prevalence for syndromal depression. LÄS MER

  7. 5. Orofacial function in children with speech sound disorders

    Författare :Åsa Mogren; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Speech sound disorder (SSD) is one of the most common neurodevelopmental disorders in children and can have different aetiologies and outcome. Speech difficulties often co-exist with other disorders, such as motor difficulties and orofacial dysfunction. These co-existent difficulties may have the same biological background. LÄS MER