Sökning: "Qian Liu"

Hittade 4 avhandlingar innehållade orden Qian Liu.

  1. 1. Essays on Labor Economics: Education, Employment, and Gender

    Författare :Qian Liu; Bertil Holmlund; Oskar Nordström Skans; Eskil Wadensjö; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi; nationalekonomi; Economics;

    Sammanfattning : Essay I, co-authored with Bertil Holmlund and Oskar Nordström Skans, offers evidence on how delayed transitions to higher education (“gap years”) affect subsequent earnings and lifetime earnings. We exploit rich Swedish register data and find that postponement of higher education is associated with a persistent and non-trivial earnings penalty. LÄS MER

  3. 2. Spatial-Temporal Patterns of Urban Growth in Shanghai, China: Monitoring, Analysis, and Simulation

    Författare :Qian Zhang; Yifang Ban; Jiyuan Liu; Bin Jiang; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; urban growth; spatial-temporal pattern; remote sensing; spatial metrics; scenarios-based simulation; Shanghai; Geoengineering; Geoteknik;

    Sammanfattning : Supporting huge population, megacities are definitely the hot spots of production, consumption, and waste generation. Without careful investment and planning, megacities will be overwhelmed by burgeoning negative impacts on the environment, natural resources, and human health, as well as a host of social and economic issues. LÄS MER

  4. 3. Studies of Voltage Losses in Organic Solar Cells

    Författare :Deping Qian; Fengling Zhang; Feng Gao; Olle Inganäs; Natalie Stingelin; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Organic photovoltaic (OPV) devices based on semiconducting polymers and small molecules are potential alternatives to inorganic solar cells, owing to their advantages of being inexpensive, lightweight, flexible and suitable for roll-to-roll production. The state of art organic solar cells (OSCs) performed power conversion efficiencies (PCEs) over 13%. LÄS MER

  5. 4. Experimental Helicobacter pylori infection in an animal model

    Författare :Yi-Qian Sun; Torkel Wadström; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Background: Helicobacter pylori is a microaerophilic Gram-negative bacterium colonizing the human stomach. The prevalence of this infection is between 20-90% depending on geographic location. Comprehensive studies have shown significant relationships between H. pylori infection and chronic gastritis, peptic ulcer and gastric carcinoma. LÄS MER