Sökning: "fysik 1000"

Visar resultat 21 - 25 av 54 uppsatser innehållade orden fysik 1000.

  1. 21. Generation and characterization of intense attosecond XUV pulses

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Xiuyu Wu; [2019]
    Nyckelord :;

    Sammanfattning : Electronic dynamics in molecules and atoms takes place on the attosecond timescale. For the observation of such processes, measurement techniques with attosecond resolution are needed. LÄS MER

  3. 22. Fabrication and Optimization of a Nanoplasmonic Chip for Diagnostics

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Jonas Segervald; [2019]
    Nyckelord :AFM; NIL; SPR; SERS; nanohole; nanohole array; nanoimprint lithography; physical vapor deposition; plasma treatment; plasmonic; plasmons; surface plasmon resonance; localized surface plasmon resonance; metal enhanced fluoresence; surface enhanced raman spectroscopy; transmittance; nanoplasmonic; signal enhancement;

    Sammanfattning : To increase the survival rate from infectious- and noncommunicable diseases, reliable diagnostic during the preliminary stages of a disease onset is of vital importance. This is not trivial to achieve, a highly sensitive and selective detection system is needed for measuring the low concentrations of biomarkers available. LÄS MER

  4. 23. Validation of blast simulation models via drop-tower tests

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Joakim Rydman; [2018]
    Nyckelord :Screw; bolt; screw joint; bolted connection; simulation; model; FEM; FEA; finite element; LS-DYNA; drop-tower tests; validation;

    Sammanfattning : This study aims to validate a screw joint simulation model used by BAE Systems in LS-DYNA during blast simulations. It is important that the screw joint simulation model is physically correct, since the simulation results can influence major design decisions. LÄS MER

  5. 24. Dimensionering av stålstomme och brandskyddsfärg vid en given brandteknisk klass

    Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Johan Sedin; [2018]
    Nyckelord :;

    Sammanfattning : WSP Structures in Umeå wants the student to propose a preliminary design for a steel frame with a given input, considering the ultimate limit state and fire. The project has been limited to design the frame for the ultimate limit state and the fire design has been limited to calculate the amount of fire retardant paint needed for fire classification R30 for building components. LÄS MER

  7. 25. Hunting for Dark Stars with the James Webb Space Telescope

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Josefine Nittler; [2018]
    Nyckelord :Dark stars; James Webb Space Telescope; JWST;

    Sammanfattning : The first stars in the Universe are thought to have formed in high dark matter density minihalos about 200 million years after the Big Bang. If these stars were able to contract dark matter into their stellar core while forming, some of them might have turned into dark stars (DSs) powered by the heat from dark matter annihilation. LÄS MER