Recent additions

  • Anodic Activity of Hydrated and Anhydrous Iron (II) Oxalate in Li-Ion Batteries 

    Keshavarz, Fatemeh; Kadek, Marius; Barbiellini, Bernardo; Bansil, Arun (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-12)
    We discuss the applicability of the naturally occurring compound Ferrous Oxalate Dihydrate (FOD) (FeC2O4·2H2O) as an anode material in Li-ion batteries. Using first-principles modeling, we evaluate the electrochemical activity of FOD and demonstrate how its structural water content affects the intercalation reaction and contributes to its performance. We show that both Li0 and Li+ intercalation in ...
  • Áika: A Distributed Edge System for AI Inference 

    Alslie, Joakim Aalstad; Ovesen, Aril Bernhard; Nordmo, Tor-Arne Schmidt; Johansen, Håvard D.; Halvorsen, Pål; Riegler, Michael; Johansen, Dag (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-17)
    Video monitoring and surveillance of commercial fisheries in world oceans has been proposed by the governing bodies of several nations as a response to crimes such as overfishing. Traditional video monitoring systems may not be suitable due to limitations in the offshore fishing environment, including low bandwidth, unstable satellite network connections and issues of preserving the privacy of crew ...
  • 2022 Tonga Volcanic Eruption Induced Global Propagation of Ionospheric Disturbances via Lamb Waves 

    Zhang, Shun-Rong; Vierinen, Juha; Aa, Ercha; Goncharenko, Larisa P.; Erickson, Philip J.; Rideout, William; Coster, Anthea J.; Spicher, Andres (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-23)
    The Tonga volcano eruption at 04:14:45 UT on 2022-01-15 released enormous amounts of energy into the atmosphere, triggering very significant geophysical variations not only in the immediate proximity of the epicenter but also globally across the whole atmosphere. This study provides a global picture of ionospheric disturbances over an extended period for at least 4 days. We find traveling ionospheric ...
  • MIS 3 age of the Veiki moraine in N Sweden – Dating the landform record of an intermediate-sized ice sheet in Scandinavia 

    Alexanderson, Helena; Hättestrand, Martina; Lindqvist, Mimmi A.; Sigfúsdóttir, Thorbjörg (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-14)
    The Veiki moraine in northern Sweden, a geomorphologically distinct landscape of ice-walled lake plains, has been interpreted to represent the former margin of an intermediate-sized pre–Last Glacial Maximum (LGM) Fennoscandian ice sheet, but its age is debated as either marine isotope stage (MIS) 5c or MIS 3. We have applied optically stimulated luminescence (OSL) and radiocarbon dating to four sites ...
  • Physics-Guided Loss Functions Improve Deep Learning Performance in Inverse Scattering 

    Liu, Zicheng; Roy, Mayank; Prasad, Dilip K.; Agarwal, Krishna (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-15)
    Solving electromagnetic inverse scattering problems (ISPs) is challenging due to the intrinsic nonlinearity, ill-posedness, and expensive computational cost. Recently, deep neural network (DNN) techniques have been successfully applied on ISPs and shown potential of superior imaging over conventional methods. In this paper, we discuss techniques for effective incorporation of important physical ...
  • ICEBEAR-3D: A Low Elevation Imaging Radar Using a Non-Uniform Coplanar Receiver Array for E Region Observations 

    Lozinsky, Adam; Hussey, Glenn; McWilliams, Kathryn; Huyghebaert, Devin Ray; Galeschuk, Draven (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-19)
    The Ionospheric Continuous-wave E region Bistatic Experimental Auroral Radar (ICEBEAR) has been reconfigured using a phase error minimization and stochastic antenna location perturbation technique. The resulting 45-baseline sparse non-uniform coplanar T-shaped array, ICEBEAR-3D, is used for aperture synthesis radar imaging of low elevation targets. The reconfigured receiver antenna array now has ...
  • Critical Assessment of Metagenome Interpretation: the second round of challenges 

    Meyer, Fernando; Fritz, Adrian; Deng, Zhi-Luo; Koslicki, David; Lesker, Till Robin; Gurevich, Alexey; Robertson, Gary; Alser, Mohammed; Antipov, Dmitry; Beghini, Francesco; Bertrand, Denis; Brito, Jaqueline J.; Brown, C. Titus; Buchmann, Jan; Buluç, Aydin; Chen, Bo; Chikhi, Rayan; Clausen, Philip T. L. C.; Cristian, Alexandru; Dabrowski, Piotr Wojciech; Darling, Aaron E.; Egan, Rob; Eskin, Eleazar; Georganas, Evangelos; Goltsman, Eugene; Gray, Melissa A.; Hansen, Lars Hestbjerg; Hofmeyr, Steven; Huang, Pingqin; Irber, Luiz; Jia, Huijue; Jørgensen, Tue Sparholt; Kieser, Silas D.; Klemetsen, Terje; Kola, Axel; Kolmogorov, Mikhail; Korobeynikov, Anton; Kwan, Jason; LaPierre, Nathan; Lemaitre, Claire; Li, Chenhao; Limasset, Antoine; Malcher-Miranda, Fabio; Mangul, Serghei; Marcelino, Vanessa R.; Marchet, Camille; Marijon, Pierre; Meleshko, Dmitry; Mende, Daniel R.; Milanese, Alessio; Nagarajan, Niranjan; Nissen, Jakob; Nurk, Sergey; Oliker, Leonid; Paoli, Lucas; Peterlongo, Pierre; Piro, Vitor C.; Porter, Jacob S.; Rasmussen, Simon; Rees, Evan R.; Reinert, Knut; Renard, Bernhard; Robertsen, Espen Mikal; Rosen, Gail L.; Ruscheweyh, Hans-Joachim; Sarwal, Varuni; Segata, Nicola; Seiler, Enrico; Shi, Lizhen; Sun, Fengzhu; Sunagawa, Shinichi; Sørensen, Søren Johannes; Thomas, Ashleigh; Tong, Chengxuan; Trajkovski, Mirko; Tremblay, Julien; Uritskiy, Gherman; Vicedomini, Riccardo; Wang, Zhengyang; Wang, Ziye; Wang, Zhong; Warren, Andrew; Willassen, Nils Peder; Yelick, Katherine; You, Ronghui; Zeller, Georg; Zhao, Zhengqiao; Zhu, Shanfeng; Zhu, Jie; Garrido-Oter, Ruben; Gastmeier, Petra; Hacquard, Stephane; Häußler, Susanne; Khaledi, Ariane; Maechler, Friederike; Mesny, Fantin; Radutoiu, Simona; Schulze-Lefert, Paul; Smit, Nathiana; Strowig, Till; Bremges, Andreas; Sczyrba, Alexander; McHardy, Alice Carolyn (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-08)
    Evaluating metagenomic software is key for optimizing metagenome interpretation and focus of the Initiative for the Critical Assessment of Metagenome Interpretation (CAMI). The CAMI II challenge engaged the community to assess methods on realistic and complex datasets with long- and short-read sequences, created computationally from around 1,700 new and known genomes, as well as 600 new plasmids ...
  • Inference Guided Few-Shot Segmentation 

    Burman, Joel (Master thesis; Mastergradsoppgave, 2022-06-22)
    Few-shot segmentation has in recent years gotten a lot of attention. The reason is its ability to segment images from classes based on only a handful of labeled support images. This opens up many possibilities when the need for a big dataset is removed. To do this a few-shot segmentation network need to extract as much quality information from each support image as possible. In this thesis we ...
  • Rossby Wave Changes During the Recent Decades in Mid-Latitude Continents in the Northern Hemisphere 

    Juskenaite, Ieva (Master thesis; Mastergradsoppgave, 2022-06-22)
    Increasing frequency and severity of extreme weather events throughout the recent years is a highly concerning topic. Extreme and unusual weather conditions, such as heat waves, floods and cold spells are causing a major concern for humanity. Agricultural changes, damages in infrastructure and the loss of human lives are some of the extreme weather event consequences, with the most drastic consequences ...
  • Combined X-Ray Computed Tomography and X-Ray Fluorescence Drill Core Scanning for 3-D Rock and Ore Characterization: Implications for the Lovisa Stratiform Zn-Pb Deposit and Its Structural Setting, Bergslagen, Sweden 

    Luth, Stefan; Sahlström, Fredrik; Bergqvist, Mikael; Hansson, Alexander; Lynch, Edward P.; Sädbom, Stefan; Jonsson, Erik; Andersson, Stefan S.; Arvanitidis, Nikolaos (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-29)
    We present the results of a pilot study that integrates automated drill core scanning technology based on simultaneous X-ray computed tomography (XCT) and X-ray fluorescence (XRF) analyses to provide high-spatialresolution (<0.2 mm) information on 3-D rock textures and structures, chemical composition, and density. Testing of its applicability for mineral exploration and research was performed by ...
  • Finite element simulation of transmission and reflection of acoustic waves in the ultrasonic transducer 

    Shukla, Kaushik; Ahmad, Azeem; Ahluwalia, Balpreet Singh; Melandsø, Frank; Habib, Anowarul (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-30)
    In scanning acoustic microscopy (SAM), the image quality depends on several factors such as noise level, resolution, and interaction of the waves with sample boundaries. The theoretical equations for the reflection coefficient and transmission coefficient are suitable for plane boundaries but fail for curved/rough boundaries. We presented a finite element method-based modeling for the loss ...
  • Plasma-neutral gas interactions in various space environments: Assessment beyond simplified approximations as a Voyage 2050 theme 

    Yamauchi, Masatoshi; De Keyser, Johan; Parks, George; Oyama, Shin-ichiro; Wurz, Peter; Abe, Takumi; Beth, Arnaud; Daglis, Ioannis A.; Dandouras, Iannis; Dunlop, Malcolm; Henri, Pierre; Ivchenko, Nickolay; Kallio, Esa; Kucharek, Harald; Liu, Yong C.-M.; Mann, Ingrid; Marghitu, Octav; Nicolaou, Georgios; Rong, Zhaojin; Sakanoi, Takeshi; Saur, Joachim; Shimoyama, Manabu; Taguchi, Satoshi; Tian, Feng; Tsuda, Takuo; Tsurutani, Bruce; Turner, Drew; Ulich, Thomas; Yau, Andrew; Yoshikawa, Ichiro (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-26)
    In the White Paper, submitted in response to the European Space Agency (ESA) Voyage 2050 Call, we present the importance of advancing our knowledge of plasma-neutral gas interactions, and of deepening our understanding of the partially ionized environments that are ubiquitous in the upper atmospheres of planets and moons, and elsewhere in space. In future space missions, the above task ...
  • Network Analysis and Boosting the Distribution to Local Consumers at Northern Senja, Norway with Potential Renewable Generation using Power Flow Control 

    Rochmann, Karl Henrik (Master thesis; Mastergradsoppgave, 2022-06-08)
    Renewable generation and power flow control are increasing its importance for power systems. The promising development in the technology increases the efficiency for transferring energy. With increasing consumption, remote locations benefit from close laying power production due to reduced transfer losses. In these recent years, energy storage system and local renewable energy production injected ...
  • Solar Photovoltaic Potential on Commercial Buildings in Arctic Latitudes 

    Larsen, Andreas (Master thesis; Mastergradsoppgave, 2022-06-01)
    This thesis desires to study the use of solar resources in a less frequently used location, by exploring the use of a photovoltaic systems on the roof of a warehouse in Tromsø, Norway. The research is gathered using a 15 000 𝑚2 warehouse as the location, which has an annual energy consumption of 2,9 GWh. The solar resources at this location are highly dependent on season, with periods of polar ...
  • Assessment of Solar Photovoltaics and Wind Energy for Increased Electrification and Grid Independent Farming 

    Rüger, Moritz (Master thesis; Mastergradsoppgave, 2022-05-31)
    A solution towards increased electrification and reduced greenhouse gas emissions in the agriculture is local renewable energy production. Not only is it a sustainable and environmentally positive project, but with remarkably increasing electricity prices renewable energy projects can also be economically favorable for farmers, by reducing grid dependence and hence high electricity costs. In this ...
  • DC-Approximated Power System Reliability Predictions with Graph Convolutional Neural Networks 

    Haugseth, Fredrik Marinius (Master thesis; Mastergradsoppgave, 2022-05-30)
    The current standard operational strategy within electrical power systems is done following deterministic reliability practices. These practices are deemed to be secure under most operating situations when considering power system security, but as the deterministic practices do not consider the probability and consequences of operation, the operating situation may often become either too strict or ...
  • Generating customer's credit behavior with deep generative models 

    Andrade Mancisidor, Rogelio; Kampffmeyer, Michael; Aas, Kjersti; Jenssen, Robert (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-17)
    Banks collect data x<sub>1</sub> in loan applications to decide whether to grant credit and accepted applications generate new data x<sub>2</sub> throughout the loan period. Hence, banks have two measurement-modalities, which provide a complete picture about customers. If we can generate x<sub>2</sub> conditioned on x<sub>1</sub> keeping the relationship between these two modalities, credit and ...
  • Anomaly detection-inspired few-shot medical image segmentation through self-supervision with supervoxels 

    Hansen, Stine; Gautam, Srishti; Jenssen, Robert; Kampffmeyer, Michael (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-11)
    Recent work has shown that label-efficient few-shot learning through self-supervision can achieve promising medical image segmentation results. However, few-shot segmentation models typically rely on prototype representations of the semantic classes, resulting in a loss of local information that can degrade performance. This is particularly problematic for the typically large and highly heterogeneous ...
  • Klimasatsing i kystfiskehavner: En analyse av energibruk på fangst- og mottaksleddet i kystfiskeflåten 

    Høyli, Randulf; Aarsæther, Karl Gunnar (Research report; Forskningsrapport, 2022-03-01)
    Analyse av energibruk i fangst- og mottaksleddet viser at drivstofforbruk i flåteleddet representerer den største andelen av totalt energibruk for produksjon av ferskfisk, tørrfisk og frossenfisk. Vi finner at fartøy under 15 meter i gjennomsnitt driver mest drivstoffeffektivt fiske, sammenlignet med den øvrige kystfiskeflåten i Flakstad kommune. Vi estimerer at flåtens CO2-utslipp er økende fra ...
  • Dataset of fitness trackers and smartwatches to measuring physical activity in research 

    Henriksen, André; Woldaregay, Ashenafi Zebene; Muzny, Miroslav; Hartvigsen, Gunnar; Hopstock, Laila Arnesdatter; Grimsgaard, Sameline (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-16)
    Objectives: Accelerometer-based wrist-worn ftness trackers and smartwatches (wearables) appeared on the consumer market in 2011. Many wearable devices have been released since. The objective of this data paper is to describe a dataset of 423 wearables released before July 2017.<p> <p>Data description: We identifed wearables and extracted information from six online and ofine databases. We ...

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