• Experimental study of volumetric sand production with gas flow 

  Varkas, Michail; Papamichos, Euripides; Berntsen, Andreas Nicolas (Journal article; Peer reviewed, 2024)

  The presence of sand in a production stream has been a common issue for wells drilled in high permeability sandstone formations. In the case of gas producing reservoirs, sand production can be particularly hazardous due ...

• In-process epimerisation of alginates from Saccharina latissima, Alaria esculenta and Laminaria hyperborea 

  Nøkling-Eide, Katharina; Aachmann, Finn Lillelund; Tøndervik, Anne; Arlov, Øystein; Sletta, Håvard (Journal article; Peer reviewed, 2024)

  Alginates are valued in many industries, due to their versatile properties. These polysaccharides originate from brown algae (Phaeophyceae) and some bacteria of the Azotobacter and Pseudomonas genera, consisting of 1 → 4 ...

• Two decades of increasing functional and phylogenetic richness in a mountaintop flora in central Norway 

  Vanneste, Thomas; Graae, Bente Jessen; Kyrkjeeide, Magni Olsen; Lindmo, Sigrid; Michelsen, Ottar; Naranjo-Orrico, Domenica J.; Ray, Courtenay A.; Vandersteene, Matthias; Verheyen, Kris; De Frenne, Pieter (Journal article; Peer reviewed, 2024)

  Questions: Analysing how multiple facets of biodiversity vary across space and time can help to predict the vulnerability of mountaintop floras to future environmental changes. Here we addressed the following questions: ...

• Optimal stability results and nonlinear duality for L∞ entropy and L1 viscosity solutions 

  Alibaud, Nathaël; Letnes, Jørgen Endal; Jakobsen, Espen Robstad (Journal article; Peer reviewed, 2024)

  We give a new and rigorous duality relation between two central notions of weak solutions of nonlinear PDEs: entropy and viscosity solutions. It takes the form of the nonlinear dual inequality: ˆ |Stu0−Stv0|ϕ0dx≤ ˆ ...

• Tuning of Online Feedback Optimization for setpoint tracking in centrifugal compressors 

  Zagorowska, Marta Anna; Ortmann, Lukas; Rupenyan, Alisa; Mercangöz, Mehmet; Imsland, Lars (Journal article; Peer reviewed, 2024)

  Online Feedback Optimization (OFO) controllers steer a system to its optimal operating point by treating optimization algorithms as auxiliary dynamic systems. Implementation of OFO controllers requires setting the parameters ...

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