Sökning: "local radio"

Visar resultat 6 - 10 av 107 uppsatser innehållade orden local radio.

  1. 6. “You just don’t expect serious crisis information on a platform like Instagram.” : A qualitative study about Swedish civilians’ social media usage and information seeking behaviours in relation to crisis information.

    Kandidat-uppsats, Karlstads universitet/Institutionen för geografi, medier och kommunikation (from 2013)

    Författare :Tilde Johansson; Ebba Martinsson; [2023]
    Nyckelord :Social media; social media use; crisis communication; information vetting; information sharing; information seeking; Sociala medier; kriskommunikation; Krisinformation; Informationstolkning; Informationsdelning; Informationssökande;

    Sammanfattning : This qualitative study investigates people's media use and engagement on social media. By combining prompts material and qualitative interviews with theories such as the social mediated crisis communication model (Austin et al., 2012) and uses and gratifications theory (Katz et al. LÄS MER

  2. 7. Personalized Federated Learning for mmWave Beam Prediction Using Non-IID Sub-6 GHz Channels

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Yuan Cheng; [2022]
    Nyckelord :Personalized Federated Learning; Millimeter wave; Beamforming; DeepMIMO; Non-IID; Personaliserad Federad Inlärning; Millimetervågor; Strålformning; DeepMIMO; Icke-IID;

    Sammanfattning : While it is difficult for base stations to estimate the millimeter wave (mmWave) channels and find the optimal mmWave beam for user equipments (UEs) quickly, the sub-6 GHz channels which are usually easier to obtain and more robust to blockages could be used to reduce the time before initial access and enhance the reliability of mmWave communication. Considering that the channel information is collected by a massive number of radio base stations and would be sensitive to privacy and security, Federated Learning (FL) is a match for this use case. LÄS MER

  3. 8. One-Dimensional Velocity Distributions of Fast Ions under RF Heating Including Doppler Shift in Tokamaks

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Lukas Bähner; [2022]
    Nyckelord :plasma; fusion; ICRH; Ion Cyclotron Resonance Heating; RF; radio frequency; Fokker-Planck equation; Fokker-Planck solver; quasilinear operator; Coulomb collision; Doppler shift; velocity distribution; local temperature; plasma; fusion; ICRH; joncyklotronuppvärmning; RF; radiofrekvens; Fokker-Planck-ekvationen; Fokker-Planck-lösare; kvasilinjär operator; Coulombkollisioner; Dopplerskift; hastighetsfördelning; lokal temperatur;

    Sammanfattning : The goal of nuclear fusion research is to create a clean and virtually limitless energy source. In order to that, a plasma must be heated to hundreds of millions degrees Celsius. A commonly used heating mechanism is ion cyclotron resonance heating, where antennas emit radio waves into the plasma. LÄS MER

  4. 9. Fermi-LAT gamma-ray and multi-wavelength SED analysis and modelling of PKS 0426-380 : A thesis analysing the behaviour and properties of the blazar PKS 0426-380

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Författare :Nathanael Löfström; [2022]
    Nyckelord :active galactic nucleus; black hole; AGN; Fermi-LAT; JetSeT;

    Sammanfattning : An analysis is made on the Flat Spectrum Radio Quasar PKS 0426-380 using two sets of data. The first set of data is the Fermi-LAT data collected over the time 54682.66 − 59317.66 in Modified Julian Date within the energy range of 100 MeV to 500 GeV. LÄS MER

  5. 10. Coordination of base station energy storage for renewable energy grid : Utilizing Base Station battery storage to stabilize grids with Variable Renewable Energy Sources

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Linus Pekkanen; [2022]
    Nyckelord :Renewable Energy; Energy Storage; Optimal Control; Model Predictive Control; Smart Grids; Machine Learning; Neural Networks; Base Stations; Telecommunications; Förnybar Energi; Energilagring; Optimal Kontroll; Modellprediktiv Reglering; Smarta Elnät; Maskininlärning; Neurala Nätverk; Basstationer; Telekommunikation;

    Sammanfattning : An increasing amount of variable renewable energy sources are being added to the world’s power grids both as an effort to reduce greenhouse gas emissions in the fight against climate change but also because some of the energy sources with the lowest levelized cost of energy are variable renewable energy sources such as wind and photovoltaics. These energy sources come with inherent difficulties since their energy production is neither constant nor entirely controllable and can cause issues for the power grids if they cause power production and consumption to become imbalanced. LÄS MER