Essays about: "Spectral theory"

Showing result 11 - 15 of 78 essays containing the words Spectral theory.

  1. 11. Prompt emission in Gamma-ray bursts; Photospheric Radiation from Synchrotron-Like spectra

    University essay from KTH/Fysik

    Author : Erik Vitols; [2022]
    Keywords : Gamma-ray burst; radiation mechanisms: thermal and non-thermal;

    Abstract : Gamma-ray bursts (GRBs) are the most luminous phenomena in the Universe, explosions whoseenergy is generated by supernovae or mergers of dense objects such as neutron stars. The GRBemission is divided into the prompt emission phase characterized by γ-ray radiation and the afterglowof lower energy radiation. READ MORE

  3. 12. Measuring the [C II]-to-H I connection in high-redshift absorption-selected galaxies

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Gaurav Senthil Kumar; [2022]
    Keywords : QSO; Quasar; Black Hole; AGN; Active Galactic Nuclei; DLA; Damped Lyman Alpha; C II; [C II]; H I; Sightline; HST; X-shooter; Spectroscopy; Echelle Spectroscope; Hyperfine transition; Hyperfine; Physics and Astronomy;

    Abstract : HI neutral gas is the basic building block of galaxies. It dictates the star formation rate and hence the metal enrichment rates within high redshift galaxies. HI neutral gas cannot be directly observed beyond z ≈ 0. READ MORE

  4. 13. Detecting Social Breathing : Quantitative signs of interaction in conversational data

    University essay from Umeå universitet/Institutionen för fysik

    Author : Cordelia Horns; [2022]
    Keywords : time series; interaction; human interaction; data analysis; wavelet analysis; machine learning; Social Breathing;

    Abstract : Human interaction has been a focus of study in psychology for a long time, but until recentlyonly very specific aspects of interaction have been considered. This approach leads to studiesthat gave insights into certain contexts, like parent-child or patient-clinician dynamics [1], [2]. READ MORE

  5. 14. Traffic Prediction From Temporal Graphs Using Representation Learning

    University essay from KTH/Matematisk statistik

    Author : Andreas Movin; [2021]
    Keywords : Dynamic time warping DTW ; embedding; graph convolutional networks GCN ; graph neural networks GNN ; persistent homology; spectral graph theory; temporal graphs; topological data analysis TDA ; Dynamisk time warping DTW ; inbäddning; convolutional grafnätverk GCN ; neurala grafnätverk GNN ; persistent homologi; spektral graf teori; dynamisk graf; topologisk dataanalys TDA ;

    Abstract : With the arrival of 5G networks, telecommunication systems are becoming more intelligent, integrated, and broadly used. This thesis focuses on predicting the upcoming traffic to efficiently promote resource allocation, guarantee stability and reliability of the network. READ MORE

  6. 15. Charging behaviour of the amine moiety at the air-water interface. A vibrational sum frequency study

    University essay from KTH/Yt- och korrosionsvetenskap

    Author : Mikael Gullstrand; [2021]
    Keywords : Langmuir monolayers; Vibrational Sum Frequency Spectroscopy; Fatty amine; Monovalent ions; Poisson Boltzmann theory; Langmuirmonolager; Vibrationssumfrekvensspektroskopi; Fettkedjeamin; Monovalenta joner; Poisson-Boltzmann-teori;

    Abstract : Laddningsbeteendet hos amingruppen vid ytgränsskiktet mellan vatten och luft har studerats under ändring av vattenfasens pH och NaCl-koncentration via den ickelinjära laserspektroskopiska tekniken, vibrationssumfrekvensspektroskopi (VSFS). Modellen som användes för ytan bestod av ett Langmuirmonolager av 1-docosanamin, en icke-löslig fettkedjeamin med NH2-gruppen riktad mot vattenfasen. READ MORE