Browsing Publikasjoner fra CRIStin by Subject "VDP::Matematikk og Naturvitenskap: 400"

Now showing items 101-120 of 154

    • OpenIaC: open infrastructure as code - the network is my computer 

      Chunming, Rong; Geng, Jiahui; Hacker, Thomas J.; Bryhni, Haakon; JAATUN, Martin Gilje (Peer reviewed; Journal article, 2022)
      Modern information systems are built fron a complex composition of networks, infrastructure, devices, services, and applications, interconnected by data flows that are often private and financially sensitive. The 5G networks, ...

    • Optimisation of Thimble simulations and quantum dynamics of multiple fields in real time 

      Woodward, Simon; Saffin, Paul M.; Mou, Zonggang; Tranberg, Anders (Peer reviewed; Journal article, 2022)
      We apply the Generalised Thimble approach to the computation of exact path integrals and correlators in real-time quantum field theory. We first investigate the details of the numerical implementation and ways of optimizing ...

    • Order parameter dynamics of the non-linear sigma model in the large N limit 

      Gemsheim, Sebastian; Mandal, Ipsita; Sengupta, Krishnendu; Wang, Zhiqiang (Peer reviewed; Journal article, 2020)
      We study non-equilibrium order parameter dynamics of the non-linear sigma model in the large N limit, using Keldysh formalism. We provide a scheme for obtaining stable numerical solution of the Keldysh saddle point equations ...

    • Ostwald ripening of gas bubbles in porous media: Impact of pore geometry and spatial bubble distribution 

      Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav (Peer reviewed; Journal article, 2024)
      We study pore-scale gas bubble ripening in porous media by combining a mass transfer method based on chemical potential differences with a level-set method for updating the gas/liquid configurations. We examine the impact ...

    • Outcrop-scale fracture analysis and seismic modelling of a basin-bounding normal fault in platform carbonates, central Italy 

      Volatili, Tiziano; Agosta, Fabrizio; Cardozo, Nestor; Zambrano, Miller; Lecomte, Isabelle Christine; Tondi, Emanuele (Peer reviewed; Journal article, 2022)
      Faults are characterized by a complex internal architecture. In carbonates, the geometry, attitude, and distri­bution of fault-related fractures and subsidiary faults can largely affect the petrophysical properties and hy­ ...

    • Oxyvinylenelactam Polymers-A New Class of Lactam-Based Kinetic Hydrate Inhibitor Polymers 

      Kelland, Malcolm Andrew; Ghosh, Radhakanta; Undheim, Audun; Dirdal, Erik Gisle; Ajiro, Hiroharu (Peer reviewed; Journal article, 2022)
      The deployment of kinetic hydrate inhibitors (KHIs) is a chemical method for the prevention of gas hydrate plugging in gas, condensate, and oil production flow lines. Polymers made using the monomer N-vinylcaprolactam ...

    • Perturbative thermal QCD: Formalism and applications 

      Ghiglieri, Jacopo; Kurkela, Aleksi; Strickland, Michael; Vuorinen, Aleksi (Peer reviewed; Journal article, 2020)
      In this review article, we discuss the current status and future prospects of perturbation theory as a means of studying the equilibrium thermodynamic and near-equilibrium transport properties of deconfined QCD matter. We ...

    • Phosphonated Lower-Molecular-Weight Polyethyleneimines as Oilfield Scale Inhibitors: An Experimental and Theoretical Study 

      Mady, Mohamed Fawzy Hamed Attia; Karaly, Ali H.; Abdel-Azeim, Safwat; Hussein, Ibnelwaleed A.; Kelland, Malcolm Andrew; Younis, Ahmed (Peer reviewed; Journal article, 2022)
      For many years, amino methylenephosphonate (-CH2-N-PO3H2)-based scale inhibitors (SIs) have been deployed for preventing various scales in the oil and gas industry, particularly for squeeze treatment applications. However, ...

    • Photodegradable Antimicrobial Agents: Synthesis and Mechanism of Degradation 

      Eikemo, Vebjørn; Holmelid, Bjarte; Sydnes, Leiv K.; Sydnes, Magne Olav (Peer reviewed; Journal article, 2022)
      As a strategy to inactivate antimicrobial agents after use, we designed a range of ethanolamine derivatives where four of them possessed interesting activity. The ethanolamine moiety facilitates photodecomposition, which ...

    • Photodegradable Antimicrobial Agents: Towards Structure Optimization 

      Alves Souto de Aquino, Gabriel; Nguyen van Sang, Liza Maëva; Valery, Romane; Lanave, Maelys; Estopiñá-Durán, Susana; Håheim, Katja Stangeland; Baptista Ferreira, Sabrina; Sydnes, Magne Olav (Peer reviewed; Journal article, 2023)
      Antibiotic resistance continues to be an ominous threat facing human health globally and urgent action is required to limit the loss of human life. The pollution of antibiotics into the environment is one of the drivers ...

    • The population genomic legacy of the second plague pandemic 

      Gopalakrishnan, Shyam; Ebenesersdottir, S.Sunna; Lundstrøm, Inge K.C.; Turner-Walker, Gordon; Moore, Kristjan H.S.; Luisi, Pierre; Magaryan, Ashot; Martin, Michael D.; Ellegaard, Martin Rene; Magnusson, Olafur T.; Sigurdsson, Asgeir; Snorradóttir, Steinunn; Magnúsdóttir, Droplaug N.; Laffoon, Jason E.; van Dorp, Lucy; Liu, Xiaodong; Moltke, Ida; Avila-Arcos, María C.; Schraiber, Joshua G.; Rasmussen, Simon; Juan, David; Galabert, Pere; De-Dios, Toni; Fotakis, Anna K.; Iraeta-Orbegozo, Miren; Vågene, Åshild J.; Denham, Sean Dexter; Christophersen, Axel; Stenøien, Hans K.; Vieira, Filipe G.; Liu, Shanlin; Günther, Torsten; Kivisild, Toomas; Moseng, Ole Georg; Skar, Birgitte; Cheung, Christina; Sandoval-Velasco, Marcela; Wales, Nathan; Schroeder, Hannes; Campos, Paula F.; Gudmundsdottir, Valdis B; Sicheritz - Ponten, Thomas; Petersen, Bent; Halgunset, Jostein; Gilbert, Edmund; Cavalleri, Gianpiero L.; Hovig, Eivind; Kockum, Ingrid; Olsson, Tomas; Alfredsson, Lars; Hansen, Thomas F.; Werge, Thomas; Willerslev, Eske; Balloux, Francois; Marquès-Bonet, Tomás; Lalueza-Fox, Carles; Nielsen, Rasmus; Stefánsson, Kári; Helgason, Agnar; Gilbert, Thomas P. (Peer reviewed; Journal article, 2022)
      Human populations have been shaped by catastrophes that may have left long-lasting signatures in their genomes. One notable example is the second plague pandemic that entered Europe in ca. 1,347 CE and repeatedly returned ...

    • Potential of microalgae as a sustainable feed ingredient for aquaculture 

      Kumar, Gopalakrishnan; Nagappan, Senthil; Das, Probir; AbdulQuadir, Mohammad; Thaher, Mahmoud; Khan, Shoyeb; Mahata, Chandan; Al-Jabri, Hareb; Vatland, Ann Kristin (Peer reviewed; Journal article, 2021-09)
      An increase in fish consumption, combined with a decrease in wild fish harvest, is driving the aquaculture industry at rapid pace. Today, farmed seafood accounts for about half of all global seafood demand for human ...

    • Quantification by LC–MS/MS of astragaloside IV and isoflavones in Astragali radix can be more accurate by using standard addition 

      Kafle, Bijay; Baak, Jan P.A.; Brede, Cato (Peer reviewed; Journal article, 2020)
      Introduction Astragali radix (AR), the root of Astragalus, is an important medical herb widely used in traditional Chinese medicine. Bioactive components include isoflavones and a unique class of triterpenoid saponins ...

    • Quantum corrections to slow-roll inflation: scalar and tensor modes 

      Andersen, Jens Oluf; Eriksson, Magdalena Britt; Tranberg, Anders (Peer reviewed; Journal article, 2021)
      Inflation is often described through the dynamics of a scalar field, slow-rolling in a suitable potential. Ultimately, this inflaton must be identified with the expectation value of a quantum field, evolving in a quantum ...

    • Quench, thermalization, and residual entropy across a non-Fermi liquid to Fermi liquid transition 

      Haldar, Arijit; Haldar, Prosenjit; Bera, Surajit; Mandal, Ipsita; Banerjee, Sumilan (Peer reviewed; Journal article, 2020)
      We study the thermalization, after sudden and slow quenches, in an interacting model having a quantum phase transition from a Sachdev-Ye-Kitaev (SYK) non-Fermi liquid (NFL) to a Fermi liquid (FL). The model has SYK fermions ...

    • Rayleigh and Wood anomalies in the diffraction of acoustic waves from the periodically corrugated surface of an elastic medium 

      Maradudin, Alexei A.; Simonsen, Ingve (Peer reviewed; Journal article, 2016)
      By the use of the Rayleigh method we have calculated the angular dependence of the reflectivity and the efficiencies of several other diffracted orders when the periodically corrugated surface of an isotropic elastic medium ...

    • Real-time quantum dynamics, path integrals and the method of thimbles 

      Mou, Zonggang; Saffin, Paul M.; Tranberg, Anders; Woodward, Simon (Peer reviewed; Journal article, 2019)
      Direct numerical evaluation of the real-time path integral has a well-known sign problem that makes convergence exponentially slow. One promising remedy is to use Picard-Lefschetz theory to flow the domain of the field ...

    • Realistic in-medium heavy-quark potential from high statistics lattice QCD simulations 

      Petreczky, Peter; Rothkopf, Alexander Karl; Weber, Johannes Heinrich (Peer reviewed; Journal article, 2019)
      We present our first results on a direct computation of the complex in-medium heavy quark potential from realistic lattice QCD simulations. Ensembles with Nτ = 12 from the HotQCD and TUMQCD collaboration offer unprecedented ...

    • Recent Norwegian Research Relevant to Evacuation, Search and Rescue under Arctic Condition 

      Gudmestad, Ove Tobias (Peer reviewed; Journal article, 2022)
      Marine traffic is increasing in the Arctic Region. As ice in the Arctic Region retracts, opportunities for the marine industry increase. This relates to the fishing industry, which is moving further into the Arctic Seas, ...

    • Reconstructing parton distribution functions from Ioffe time data: from Bayesian methods to Neural Networks 

      Karpie, Joseph; Orginos, Kostas; Rothkopf, Alexander Karl; Zafeiropoulos, Savvas (Peer reviewed; Journal article, 2019)
      The computation of the parton distribution functions (PDF) or distribution amplitudes (DA) of hadrons from first principles lattice QCD constitutes a central open problem. In this study, we present and evaluate the efficiency ...