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Visar resultat 1 - 5 av 23 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Towards a Scalable and Low-Latency Softwarized Mobile Packet Core Network

   Författare :Van-Giang Nguyen; Anna Brunström; Karl-Johan Grinnemo; Javid Taheri; Christian Esteve Rothenberg; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mobile Packet Core; Evolved Packet Core; 5G; SDN; NFV; Scalability; Control Plane; User Plane; MME; UPF; VPP; Load Balancing; Auto-Scaling; Time-Critical; Low-Latency; Smart Grid; GOOSE; Computer Science; Datavetenskap;

   Sammanfattning : The mobile packet core – a central part of the overall mobile cellular network – has a long history of evolution. Through the years, its architecture has been drastically changed to meet the demand coming from the fast growth in the number of devices as well as the introduction of new types of applications and services. LÄS MER

3. 2. Bi2212 intrinsic Josephson junctions, fabrication and high frequency properties

   Författare :Mattias Torstensson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; intrinsic Joule heating; Shapiro steps; in plane critical current; Bi2212; high temperature superconductors; intrinsic Josephson junctions;

   Sammanfattning : The objective for this work was to investigate the high-frequency properties of Bi2212 intrinsic Josephson junctions (IJJ’s). Particularly, the possibility to reach the THz range with a SIS mixer is theoretically promising due to the high energy gap of Bi2212. LÄS MER

4. 3. Magnetization Dynamics in Nano-Contact Spin Torque Oscillators : Solitonic bullets and propagating spin waves

   Författare :Stefano Bonetti; Johan Åkerman; Thomas Silva; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magnetism; spintronics; thin magnetic films; spin transfer torque; magnetization dynamics; spin waves; microwave oscillators; giant magneto-resistance; Magnetism; Magnetism;

   Sammanfattning : Magnetization dynamics in nano-contact spin torque oscillators (STOs) is investigated from an experimental and theoretical point of view. The fundamentals of magnetization dynamics due to spin transfer torque are given. A custom-made high frequency (up to 46 GHz) in large magnetic fields (up to 2. LÄS MER

5. 4. Intrinsic tunneling spectroscopic investigations of Bi2Sr2CaCu2O8+x superconductors : The fluxon lattice, resonant phenomena,flux-flow and current doping

   Författare :Holger Motzkau; Vladimir M. Krasnov; Paul Müller; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : In this thesis, the tunneling between individual atomic layers in structures of Bi2Sr2CaCu2O8+x based high-temperature superconductors are experimentally studied employing the intrinsic Josephson effect. A special attention is paid on the fabrication of small mesa structures using micro and nanofabrication techniques. LÄS MER

7. 5. High-frequency phenomena in small Bi2Sr2CaCu2O8+x intrinsic Josephson junctions

   Författare :Holger Motzkau; Vladimir M. Krasnov; Reinhold Kleiner; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; high-temperature superconductivity; Bi-2212; cuprates; intrinsic Josephson junctions; intrinsic tunneling; fluxons; flux-flow oscillator; THz-emission; cavity resonances; polaritons; electrical doping; micro nano-fabrication; fysik; Physics;

   Sammanfattning : In this thesis, the tunneling between individual atomic layers in structures of Bi2Sr2CaCu2O8+x based high-temperature superconductors are experimentally studied employing the intrinsic Josephson effect. A special attention is paid to the fabrication of small mesa structures using micro and nanofabrication techniques. LÄS MER