Sökning: "the ring 2"

Visar resultat 1 - 5 av 103 uppsatser innehållade orden the ring 2.

  1. 1. Prospects for a Free Electron Laser at the FemtoMAX Beamline

    Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Författare :Johan Holmberg; [2024]
    Nyckelord :Free Electron Lasers; FEL; synchrotron radiation; MAX IV; FemtoMAX; GENESIS 1.3; XFEL; X-rays; soft X-rays; Physics and Astronomy;

    Sammanfattning : A Free Electron Laser (FEL), is a device that generates extremely coherent and brilliant radiation using electrons accelerated to relativistic velocities in a particle accelerator. The process utilises similar equipment to what is used at a synchrotron source like MAX IV, but in addition there is an interaction between the relativistic electron beam and the generated radiation to achieve an exponential growth in radiation intensity. LÄS MER

  3. 2. Homomorphic encryption

    Master-uppsats, KTH/Matematik (Avd.)

    Författare :Daniel Sanaee; [2023]
    Nyckelord :Mathematics; Cryptography; Computer science; Group Theory; Matematik; Kryptografi; Datalogi; Gruppteori;

    Sammanfattning : The problem of constructing a secure encryption scheme that allows for computation on encrypted data was an open problem for more than 30 years. In 2009, Craig Gentry solved the problem, constructing the first fully homomorphic encryption (FHE) scheme. LÄS MER

  4. 3. Byte från IEC 103 till IEC 61850 : Förstudie

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Signaler och system

    Författare :Daniel Nilsson; Adam Eriksson; [2023]
    Nyckelord :IEC 103; IEC 61850; Ställverkskommunikation; Ställverk; SSAB;

    Sammanfattning : The steel company SSAB in Borlänge will, in the near future, replace its protective relays in one of their substations due to the condition and age of the relays. In connection with the change, SSAB intended to switch the current communication protocol IEC 60870-5-103 (IEC 103) to IEC 61850. LÄS MER

  5. 4. Sustainable Polymer Production: Investigating Synthesis and Copolymerization of Cyclic Ketene Acetals

    Kandidat-uppsats, KTH/Kemiteknik

    Författare :Soufian Bourraman; Stella Staffas; Adam Brandt; Simon Isaksson; [2023]
    Nyckelord :Monomers; polymers; radical; radical ring opening polymerization; polymerization; BMDO; MMA; MVL; MBL; comonomer; copolymer; rROP; sustainable; biobased; degradable; monomer synthesis; plastic; polyester; bulk; solution; NMR; FTIR; TGA; DSC; SEC; hydrolysis; molecular weight; diol; ester bonds;

    Sammanfattning : The large amount of non-degradable plastic waste has become a significant environmental concern, leading to an increased need for degradable plastics. Here in, to create degradable polymers, polyesters were produced through radical ring opening polymerization using cyclic ketene acetals. LÄS MER

  7. 5. Properties of the Optical Hot Spots in the Circumstellar Ring of SN 1987A

    Master-uppsats, KTH/Fysik

    Författare :Christos Tegkelidis; [2023]
    Nyckelord :;

    Sammanfattning : The proximity of Supernova 1987A provides a great opportunity to study the aftermath of the impact of the ejecta with the dense clumps (observed as ”hot spots”) located in the equatorial circumstellar ring. This thesis examines the properties of the clumps by using Hubble Space Telescope optical imaging taken with the F625W and F675W broad filters between 1994 and 2022. LÄS MER