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  • An Investigation of Second-Order Finite Volume Methods for Field-scale Reservoir Simulation 

    Kvashchuk, Anna (PhD thesis UiS;, Doctoral thesis, 2024)
    This thesis focuses on improving the accuracy of numerical simulation of flow in subsurface reservoirs by using second-order finite volume methods. The first-order finite volume method, commonly used in reservoir simulation, ...
  • New tests for trend in time censored recurrent event data 

    Lindqvist, Bo Henry; Kvaløy, Jan Terje (Peer reviewed; Journal article, 2024)
    We consider testing for trend in recurrent event data. More precisely, for such data we consider testing of the null hypothesis of data coming from a renewal process. The new tests are essentially obtained by considering ...
  • Pulsar timing array stochastic background from light Kaluza-Klein resonances 

    Megías, Eugenio; Nardini, Germano; Quirós, Mariano (Peer reviewed; Journal article, 2023-11)
    We investigate the potential of the warped extradimension framework as an explanation for the recently observed stochastic gravitational background at nHz frequencies in pulsar timing arrays (PTA). Our analysis reveals ...
  • New tests for trend in time censored recurrent event data 

    Lindqvist, Bo Henry; Kvaløy, Jan Terje (Peer reviewed; Journal article, 2024-01)
    We consider testing for trend in recurrent event data. More precisely, for such data we consider testing of the null hypothesis of data coming from a renewal process. The new tests are essentially obtained by considering ...
  • Spectroscopy for asymmetric binary black hole mergers 

    Abedi, Jahed; Capano, Collin D.; Kastha, Shilpa; Nitz, Alexander H.; Wang, Yi-Fan; Westerweck, Julian; Nielsen, Alex Bentley; Krishnan, Badri (Peer reviewed; Journal article, 2023)
    Black hole spectroscopy is the proposal to observe multiple quasinormal modes in the ringdown of a binary black hole merger. In addition to the fundamental quadrupolar mode, overtones and higher harmonics may be present ...
  • Multimode Quasinormal Spectrum from a Perturbed Black Hole 

    Capano, Collin D.; Cabero, Miriam; Westerweck, Julian; Abedi, Jahed; Kastha, Shilpa; Nitz, Alexander H.; Wang, Yi-Fan; Nielsen, Alex Bentley; Krishnan, Badri (Peer reviewed; Journal article, 2023)
    When two black holes merge, the late stage of gravitational wave emission is a superposition of exponentially damped sinusoids. According to the black hole no-hair theorem, this ringdown spectrum depends only on the mass ...
  • Self-reported sleep fragmentation and sleep duration and their association with cognitive function in PROTECT, a large digital community-based cohort of people over 50 

    Aakre, Jon Arild; Schulz, Jörn; Ballard, Clive; Corbett, Anne; Bjorvatn, Bjørn; Aarsland, Dag; Creese, Byron; Hampshire, Adam; Brooker, Helen; Testad, Ingelin (Peer reviewed; Journal article, 2023)
    Objective Sleep is vital for normal cognitive function in daily life, but is commonly disrupted in older adults. Poor sleep can be detrimental to mental and physical health, including cognitive function. This study assessed ...
  • Thermalization of weakly coupled non-Abelian plasmas at next-to-leading order 

    Fu, Yu; Ghiglieri, Jacopo; Iqbal, Shahin; Kurkela, Eero Aleksi (Peer reviewed; Journal article, 2023)
    We employ the QCD kinetic theory, including next-to-leading(NLO) order corrections in coupling constant, to study the evolution of weakly coupled non-Abelian plasmas towards thermal equilibrium. For two characteristic ...
  • Fast and robust Bayesian inference using Gaussian processes with GPry 

    El Gammal, Jonas Elias; Schöneberg, Nils; Torrado, Jesús; Fidler, Christian (Peer reviewed; Journal article, 2023)
    We present the GPry algorithm for fast Bayesian inference of general (non-Gaussian) posteriors with a moderate number of parameters. GPry does not need any pre-training, special hardware such as GPUs, and is intended as a ...
  • Stochastic gravitational wave background from stellar origin binary black holes in LISA 

    Babak, Stanislav; Caprini, Chiara; Figueroa, Daniel G.; Karnesis, Nikolaos; Marcoccia, Paolo; Nardini, Germano; Pieroni, Mauro; Ricciardone, Angelo; Sesana, Alberto; Torrado, Jesús (Peer reviewed; Journal article, 2023)
    We use the latest constraints on the population of stellar origin binary black holes (SOBBH) from LIGO/Virgo/KAGRA (LVK) observations, to estimate the stochastic gravitational wave background (SGWB) they generate in the ...
  • Soft photon propagation in a hot and dense medium to next-to-leading order 

    Gorda, Tyler; Kurkela, Eero Aleksi; Österman, Juuso; Paatelainen, Risto; Säppi, Saga; Schicho, Philipp; Seppänen, Kaapo; Vuorinen, Aleksi (Peer reviewed; Journal article, 2023)
    We present the first complete calculation of the soft photon self-energy to the next-to-leading order in a hot and/or dense ultrarelativistic plasma in QED. The calculation is performed within the real-time formalism ...
  • Cosmology with the Laser Interferometer Space Antenna 

    Auclair, Pierre; Bacon, David; Baker, Tessa; Barreiro, Tiago; Bartolo, Nicola; Belgacem, Enis; Bellomo, Nicola; Ben-Dayan, Ido; Bertacca, Daniele; Besancon, Marc; Blanco-Pillado, Jose J.; Blas, Diego; Boileau, Guillaume; Calcagni, Gianluca; Caldwell, Robert; Caprini, Chiara; Carbone, Carmelita; Chang, Chia-Feng; Chen, Hsin-Yu; Christensen, Nelson; Clesse, Sebastien; Comelli, Denis; Congedo, Giuseppe; Contaldi, Carlo; Crisostomi, Marco; Croon, Djuna; Cui, Yanou; Cusin, Giulia; Cutting, Daniel; Dalang, Charles; De Luca, Valerio; Pozzo, Walter Del; Desjacques, Vincent; Dimastrogiovanni, Emanuela; Dorsch, Glauber C.; Ezquiaga, Jose Maria; Fasiello, Matteo; Figueroa, Daniel G.; Flauger, Raphael; Franciolini, Gabriele; Frusciante, Noemi; Fumagalli, Jacopo; García-Bellido, Juan; Gould, Oliver; Holz, Daniel; Iacconi, Laura; Jain, Rajeev Kumar; Jenkins, Alexander C.; Jinno, Ryusuke; Joana, Cristian; Karnesis, Nikolaos; Konstandin, Thomas; Koyama, Kazuya; Kozaczuk, Jonathan; Kuroyanagi, Sachiko; Laghi, Danny; Lewicki, Marek; Lombriser, Lucas; Madge, Eric; Maggiore, Michele; Malhotra, Ameek; Mancarella, Michele; Mandic, Vuk; Mangiagli, Alberto; Matarrese, Sabino; Mazumdar, Anupam; Mukherjee, Suvodip; Musco, Ilia; Nardini, Germano; No, Jose Miguel; Papanikolaou, Theodoros; Peloso, Marco; Pieroni, Mauro; Pilo, Luigi; Raccanelli, Alvise; Renaux-Petel, Sébastien; Renzini, Arianna I.; Ricciardone, Angelo; Riotto, Antonio; Romano, Joseph D.; Rollo, Rocco; Pol, Alberto Roper; Morales, Ester Ruiz; Sakellariadou, Mairi; Saltas, Ippocratis D.; Scalisi, Marco; Schmitz, Kai; Schwaller, Pedro; Sergijenko, Olga; Servant, Geraldine; Simakachorn, Peera; Sorbo, Lorenzo; Sousa, Lara; Speri, Lorenzo; Steer, Danièle A.; Tamanini, Nicola; Tasinato, Gianmassimo; Torrado, Jesús; Unal, Caner; Vennin, Vincent; Vernieri, Daniele; Vernizzi, Filippo; Volonteri, Marta; Wachter, Jeremy M.; Wands, David; Witkowski, Lukas T.; Zumalacárregui, Miguel; Annis, James; Ares, Fëanor Reuben; Avelino, Pedro P.; Avgoustidis, Anastasios; Barausse, Enrico; Bonilla, Alexander; Bonvin, Camille; Bosso, Pasquale; Calabrese, Matteo; Çalışkan, Mesut; Cembranos, Jose A. R.; Chala, Mikael; Chernoff, David; Clough, Katy; Criswell, Alexander; Das, Saurya; Silva, Antonio da; Dayal, Pratika; Domcke, Valerie; Durrer, Ruth; Easther, Richard; Escoffier, Stephanie; Ferrans, Sandrine; Fryer, Chris; Gair, Jonathan; Gordon, Chris; Hendry, Martin; Hindmarsh, Mark; Hooper, Deanna C.; Kajfasz, Eric; Kopp, Joachim; Koushiappas, Savvas M.; Kumar, Utkarsh; Kunz, Martin; Lagos, Macarena; Lilley, Marc; Lizarraga, Joanes; Lobo, Francisco S. N.; Maleknejad, Azadeh; Martins, Carlos Jose Amaro Parente; Meerburg, P. Daniel; Meyer, Renate; Mimoso, José Pedro; Nesseris, Savvas; Nunes, Nelson; Oikonomou, Vasilis; Orlando, Giorgio; Özsoy, Ogan; Pacucci, Fabio; Palmese, Antonella; Petiteau, Antoine; Pinol, Lucas; Zwart, Simon Portegies; Pratten, Geraint; Prokopec, Tomislav; Quenby, John; Rastgoo, Saeed; Roest, Diederik; Rummukainen, Kari; Schimd, Carlo; Secroun, Aurélia; Sesana, Alberto; Sopuerta, Carlos F.; Tereno, Ismael; Tolley, Andrew; Urrestilla, Jon; Vagenas, Elias C.; van de Vis, Jorinde; van de Weygaert, Rien; Wardell, Barry; Weir, David J.; White, Graham; Świeżewska, Bogumiła; Zhdanov, Valery I. (Peer reviewed; Journal article, 2023)
    The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications ...
  • Ab initio study: Investigating the adsorption behaviors of polarized greenhouse gas molecules on pillar[5]arenes 

    Rauls, Eva; Ho, Quoc Duy (Peer reviewed; Journal article, 2023)
    Supramolecular organic frameworks (SOFs) based on Pillar[5]arenes (P[5]A) have shown great potential in capturing and separating greenhouse gases. In this study, we investigate the adsorption behaviors of other environmentally ...
  • Signal analysis in gravitational wave data 

    Marcoccia, Paolo (PhD thesis UiS;, Doctoral thesis, 2024)
    In this thesis, I study the gravitational wave signals coming from compact objects on both present-stage, and future gravitational wave detectors. The thesis is based on 3 articles, which will be presented after two brief ...
  • Log-density gradient covariance and automatic metric tensors for Riemann manifold Monte Carlo methods 

    Kleppe, Tore Selland (Peer reviewed; Journal article, 2023)
    A metric tensor for Riemann manifold Monte Carlo particularly suited for nonlinear Bayesian hierarchical models is proposed. The metric tensor is built from symmetric positive semidefinite log-density gradient covariance ...
  • A Heterotic Kodaira--Spencer Theory at One-Loop 

    Ashmore, Anthony; Murgas Ibarra, Javier Jose; McNutt, David Duncan; Strickland-Constable, Charles; Svanes, Eirik Eik; Tennyson, David; Winje, Sander (Peer reviewed; Journal article, 2023-10)
    We consider a heterotic version of six-dimensional Kodaira-Spencer gravity derived from the heterotic superpotential. We compute the one-loop partition function and find it can be expressed as a product of holomorphic ...
  • Prevalence of bradycardia in 4876 newborns in the first minute after birth and association with positive pressure ventilation: A population-based cross-sectional study 

    Rettedal, Siren; Kibsgaard-Petersen, Amalie; Kvaløy, Jan Terje; Eilevstjønn, Joar; Ersdal, Hege Langli (Peer reviewed; Journal article, 2023)
    Objective To determine the prevalence of bradycardia in the first minute after birth and association with positive pressure ventilation (PPV). Method A population-based cross-sectional study was conducted from June 2019 ...
  • Ab-initio QCD Calculations Impact the Inference of the Neutron-star-matter Equation of State 

    Gorda, Tyler; Komoltsev, Oleg; Kurkela, Eero Aleksi (Peer reviewed; Journal article, 2023)
    We demonstrate that ab-initio calculations in QCD at high densities offer significant and nontrivial information about the equation of state of matter in the cores of neutron stars, going beyond that which is obtainable ...
  • Fra topologi til algebra til analyse 

    Serigstad, Alexander. (Master thesis, 2023)
  • Sammenheng mellom dentalt plakk og forkalkninger i arterievegger 

    Volkova, Olga (Bachelor thesis, 2022)

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