Sökning: "transition curves"

Visar resultat 1 - 5 av 45 avhandlingar innehållade orden transition curves.

  1. 1. Resistivity and the solid-to-liquid transition in high-temperature superconductors

    Författare :Beatriz Espinosa Arronte; Magnus Andersson; Charles Simon; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; high-temperature superconductors; vortex dynamics; vortex solid-to-liquid transition; critical scaling; glass transition; Bose glass; heavy-ion irradiation; YBCO; Tl2Ba2CaCu2O8 d; oxygen deficiency.; Condensed matter physics; Kondenserade materiens fysik;

    Sammanfattning : In high-temperature superconductors a large region of the magnetic phase diagram is occupied by a vortex phase that displays a number of exciting phenomena. At low temperatures, vortices form a truly superconducting solid phase which at high temperatures turns into a dissipative vortex liquid. LÄS MER

  2. 2. Optimisation of horizontal alignments for railways - Procedures involving evaluation of dynamic vehicle response

    Författare :Björn Kufver; KTH; []
    Nyckelord :Railway; track geometry; alignment; cant; climbing ratios; clothoids; guiding forces; passenger comfort; Pct; superelevation ramps; simulation; track shift forces; track vehicle interaction; transition curves; vehicle dynamics; wheel rail forces;

    Sammanfattning : This doctoral thesis summarises and deepens eightpublications on a project concerning railway alignments.The thesis presents an approach to definingequally costlyalignment alternatives. LÄS MER

  3. 3. Ab initio Lattice Dynamics : Hydrogen-dense and Other Materials

    Författare :Duck Young Kim; Rajeev Ahuja; Richard Needs; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Density functional theory; Density functional perturbation theory; Hydrogen-dense materials; Phase transition; High pressure; Ab initio lattice dynamics; Superconductivity; Quasi-particle approximation; Physics; Fysik;

    Sammanfattning : This thesis presents a theoretical study of materials under high pressure using ab initio lattice dynamics based on density functional theory and density functional perturbation theory using both super-cell and linear response approach. Ab initio lattice dynamics using super-cell approach is applied to compare our theoretical predictions with experimental findings. LÄS MER

  4. 4. Growth and Mechanical Properties of Transition Metal Nitrides and Carbides

    Författare :Daniel Edström; Valeriu Chirita; Lars Hultman; Denis Music; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The atomic-scale dynamical processes at play during film growth cannot be resolved by even the most advanced experimental methods. As such, computational methods, and chiefly classical molecular dynamics, are the only available research tools to study these processes. LÄS MER

  5. 5. Global energy transitions : Renewable energy technology and non-renewable resources

    Författare :Simon Davidsson; Mikael Höök; Kjell Aleklett; Björn Sandén; Uppsala universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy transitions; natural resources; renewable energy; sustainable development; growth curves; Natural Resources and Sustainable Development; Naturresurser och hållbar utveckling;

    Sammanfattning : The global energy system is dominated by the use of fossil fuels. This system suffers from several problems, such as different environmental issues, while the long-term energy security is sometimes questioned. LÄS MER