Sökning: "PRESSURES"

Visar resultat 1 - 5 av 818 avhandlingar innehållade ordet PRESSURES.

  1. 1. Microfluidics at High Pressures : Understanding, Sensing, and Control

    Författare :Martin Andersson; Lena Klintberg; Cyril Aymonier; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-pressure microfluidics; supercritical CO2; compressible flow; relative permittivity; integrated electrodes; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

    Sammanfattning : This thesis explores understanding, sensing, and control in high-pressure microfluidics. The high-pressure regime allows fluids to be forced through narrow channels at substantial speed and creates conditions for fluids of high density and low viscosity—features desired in flow-based chemical analyses. LÄS MER

  3. 2. Are We There Yet? Combining qualitative and quantitative methods to study the introduction of CAVs in Sweden, and potential travel demand effects

    Författare :Ella Rebalski; Chalmers tekniska högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; travel demand; Connected and Autonomous Vehicle; drivers; force field analysis; Value of Travel Time; sociotechnical transition; DPSIR; pressures;

    Sammanfattning : By law, Sweden must reach net-zero emissions of greenhouse gases (GHGs) by 2045. Domestic transportation is one sector in which GHG emissions can be reduced substantially. LÄS MER

  4. 3. On the temporal evolution of earth pressures in deep excavations in soft clay

    Författare :Johannes Tornborg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; field monitoring; heave; numerical modelling; earth pressures; soft natural clays; deep excavations;

    Sammanfattning : Urbanisation and sustainable development of cities drives the need to increasingly utilise underground space. Consequently, there is more demand for deeper and larger excavations in urban areas, pushing the limits of current engineering experience. LÄS MER

  5. 4. Bacterial adaption to novel selection pressures

    Författare :Annika Nilsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Evolution; bacterial adaptation; mutation rate; population size; mutation accumulation; fitness; antibiotic resistance; compensation; genetic drift; genome reduction;

    Sammanfattning : The rates and trajectories of bacterial evolution are determined both by microbial factors and environmental parameters. In this thesis 1 have investigated how bacterial mutation rates and selection pressure affect the rate and extent of adaptation to novel environments. LÄS MER

  7. 5. Mössbauer spectroscopy under high pressures and temperatures

    Författare :Elke Hålenius; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Mössbauer; high pressure - high temperature; iron; olivine; Geovetenskap; Earth sciences; Geovetenskap; mineralogi; petrologi och tektonik; Mineral Chemistry; Petrology and Tectonics;

    Sammanfattning : Iron plays a very important role in Earth materials. 57Fe- Mössbauer spectroscopy provides valuable information on the oxidation state and the near surrounding of iron atoms in crystal structures. LÄS MER