Siste publikasjoner

• Brandsæter, Andreas & Knutsen, Knut Erik (2018). Towards a framework for assurance of autonomous navigation systems in the maritime industry, In Stein Haugen; Anne Barros; Coen van Gulijk; Trond Kongsvik & Jan Erik Vinnem (ed.),  Safety and Reliability – Safe Societies in a Changing World. Proceedings of ESREL 2018, June 17-21, 2018, Trondheim, Norway.  Taylor & Francis.  ISBN 9781351174657.  56.
• Vanem, Erik & Storvik, Geir Olve (2018). Dynamical Linear Models for Condition Monitoring with Multivariate Sensor Data. International Journal of COMADEM.  ISSN 1363-7681.  21(4), s 7- 18
• Chruscinski, Dariusz; Rivas, Angel & Størmer, Erling (2018). Divisibility and Information Flow Notions of Quantum Markovianity for Noninvertible Dynamical Maps. Physical Review Letters.  ISSN 0031-9007.  121(8) . doi: 10.1103/PhysRevLett.121.080407
• Mitra, Koondanibha & Pop, Iuliu Sorin (2018). A modified L-scheme to solve nonlinear diffusion problems. Computers and Mathematics with Applications.  ISSN 0898-1221.  s 1- 17 . doi: 10.1016/j.camwa.2018.09.042
• Shaw, Kristin; Brugallé, Erwan; Mikhalkin, Grigory & Risler, Jean-Jacques (2018). Nonexistence of torically maximal hypersurfaces. Algebra i Analiz.  ISSN 0234-0852.
• Shaw, Kristin & Kummer, Mario (2018). The separating semigroup of a real curve. Annales de la Faculté des Sciences de Toulouse.  ISSN 0240-2963.
• Shaw, Kristin; Jell, Philipp & Rau, Johannes (2018). Lefschetz (1,1) theorem in tropical geometry. EPIGA.  ISSN 2491-6765.
• Jullum, Martin & Hjort, Nils Lid (2018). What price semiparametric Cox regression?. Lifetime Data Analysis.  ISSN 1380-7870.  s 1- 33 . doi: 10.1007/s10985-018-9450-7
• Dong, Tao; Shi, Zhongyuan & Jensen, Atle (2018). Bi-objective optimization of axial profile of pin fin with uniform base heat flux. Applied Thermal Engineering.  ISSN 1359-4311.  128, s 830- 836 . doi: 10.1016/j.applthermaleng.2017.09.037
• Riise, Bjørn; Grue, John; Jensen, Atle & Johannessen, Thomas Berge (2018). A note on the secondary load cycle for a monopile in irregular deep water waves. Journal of Fluid Mechanics.  ISSN 0022-1120.  849, s R1- R12 . doi: 10.1017/jfm.2018.450
• Lee, Jeonghun & Winther, Ragnar (2018). Local coderivatives and approximation of Hodge Laplace problems. Mathematics of Computation.  ISSN 0025-5718.  87(314), s 2709- 2735 . doi: 10.1090/mcom/3315
• Hu, Kaibo & Xu, Jinchao (2018). Structure-preserving finite element methods for stationary MHD models. Mathematics of Computation.  ISSN 0025-5718. . doi: http://dx.doi.org/10.1090/mcom/3341
• Kristiansen, Lars & Murwanashyaka, Juvenal (2018). Decidable and Undecidable Fragments of First-Order Concatenation Theory, In Florin Manea; Russel G. Miller & Dirk Nowotka (ed.),  Sailing Routes in the World of Computation.  Springer Nature.  ISBN 978-3-319-94417-3.  kapittel.  s 244 - 253
• Georgiev, Ivan; Kristiansen, Lars & Stephan, Frank (2018). On General Sum Approximations of Irrational Numbers, In Florin Manea; Russel G. Miller & Dirk Nowotka (ed.),  Sailing Routes in the World of Computation.  Springer Nature.  ISBN 978-3-319-94417-3.  kapittel.  s 194 - 203
• Normann, Dag (2018). Functionals of Type 3 as Realisers of Classical Theorems in Analysis, In Florin Manea; Russel G. Miller & Dirk Nowotka (ed.),  Sailing Routes in the World of Computation.  Springer Nature.  ISBN 978-3-319-94417-3.  kapittel.  s 318 - 327
• Kolaas, Jostein; Riise, Bjørn; Sveen, Kristian & Jensen, Atle (2018). Bichromatic synthetic schlieren applied to surface wave measurements. Experiments in Fluids.  ISSN 0723-4864.  59(8) . doi: 10.1007/s00348-018-2580-6
• Agram, Nacira; Hilbert, Astrid & Øksendal, Bernt (2018). SPDEs with Space-Mean Dynamics. arXiv.org.  ISSN 2331-8422.
• Agram, Nacira & Øksendal, Bernt (2018). Mean-Field Stochastic Control with Elephant Memory in Finite and Infinite Time Horizon. arXiv.org.  ISSN 2331-8422.
• Ottem, John Christian & Gounelas, Frank (2018). Remarks on the positivity of the cotangent bundle of a K3 surface. arXiv.org.  ISSN 2331-8422.
• Ottem, John Christian & Benoist, Olivier (2018). Failure of the integral Hodge conjecture for threefolds of Kodaira dimension zero. arXiv.org.  ISSN 2331-8422.
• Ottem, John Christian & Mongardi, Giovanni (2018). Curve classes on irreducible holomorphic symplectic varieties. arXiv.org.  ISSN 2331-8422.
• Carlson, Andreas (2018). Fluctuation assisted spreading of a fluid filled elastic blister. Journal of Fluid Mechanics.  ISSN 0022-1120.  846, s 1076- 1087 . doi: doi:10.1017/jfm.2018.288
• Wenzel, Eva; Schultz, Sebastian; Schink, Kay Oliver; Pedersen, Nina Marie; Nähse, Viola; Carlson, Andreas; Brech, Andreas; Stenmark, Harald & Raiborg, Camilla (2018). Concerted ESCRT and clathrin recruitment waves define the timing and morphology of intraluminal vesicle formation. Nature Communications.  ISSN 2041-1723.  9(2932), s 1- 18 . doi: 10.1038/s41467-018-05345-8
• Agram, Nacira; Øksendal, Bernt & Yakhlef, Samia (2018). Optimal control of forward-backward stochastic Volterra equations, In  Non-linear Partial Differential Equations, Mathematical Physics, and Stochastic Analysis: The Helge Holden Anniversary Volume.  European Mathematical Society Publishing House.  ISBN 978-3-03719-186-6.  Artikkel 3.  s 3 - 36
• Agram, Nacira & Øksendal, Bernt (2018). Model uncertainty stochastic mean-field control. Stochastic Analysis and Applications.  ISSN 0736-2994.
• Agram, Nacira & Øksendal, Bernt (2018). A Hida-Malliavin white noise calculus approach to optimal control. Infinite Dimensional Analysis Quantum Probability and Related Topics.  ISSN 0219-0257.  21(3), s 1850014-1- 1850014-21 . doi: 10.1142/S0219025718500145 Fulltekst i vitenarkiv.
• Lindstrøm, Erika Kristina; Ringstad, Geir; Mardal, Kent-Andre & Eide, Per Kristian (2018). Cerebrospinal fluid volumetric net flow rate and direction in idiopathic normal pressure hydrocephalus. NeuroImage: Clinical.  ISSN 2213-1582.  20, s 731- 741 . doi: 10.1016/j.nicl.2018.09.006
• Normann, Dag (2018). David Marker, Lectures on Infinitary Model Theory. Studia Logica: An International Journal for Symbolic Logic.  ISSN 0039-3215. . doi: 10.1007/s11225-018-9827-3
• Skutlaberg, Kristina; Huseby, Arne & Natvig, Bent (2018). Partial monitoring of multistate systems. Reliability Engineering & System Safety.  ISSN 0951-8320.  180, s 434- 452 . doi: 10.1016/j.ress.2018.08.006 Vis sammendrag

  For large multicomponent systems it is typically too costly to monitor the entire system constantly. In the presentpaper we consider a case where a component is unobserved in a time interval [0, T]. The time T is a stochasticvariable with a distribution which depends on the structure of the system and the lifetime distribution of theother components. Different systems will result in different distributions of T. The main focus is on how theunobserved period of time a ffects what we learn about the unobserved component during this period. Weanalyse this by considering one single component in three different cases. In the first case we consider both T aswell as the state of the unobserved component at time T as given. In the second case we allow the state of theunobserved component at time T to be stochastic, while in the third case both T and the state are treated asstochastic variables. In all cases we study the problem using preposterior analysis. That is, we investigate howmuch information we can expect to get by the end of the time interval [0, T]. The methodology is also illustratedon a more complex example.

• Miloch, Wojciech Jacek; Jung, Hendrik; Darian, Diako; Greiner, Franko; Mortensen, Mikael & Piel, A. (2018). Dynamic ion shadows behind finite-sized objects in collisionless magnetized plasma flows. New Journal of Physics.  ISSN 1367-2630.  20(7), s 1- 6 . doi: 10.1088/1367-2630/aad066
• Ouassou, Mohammed; Natvig, Bent; Jensen, Anna B.O. & Gåsemyr, Jørund Inge (2018). Reliability Analysis of Network Real - Time Kinematic. Journal of Electrical and Computer Engineering.  ISSN 2090-0147.
• Benth, Fred Espen & Pircalabu, Anca (2018). A non-Gaussian Ornstein–Uhlenbeck model for pricing wind power futures. Applied Mathematical Finance.  ISSN 1350-486X.  25(1), s 36- 65 . doi: 10.1080/1350486X.2018.1438904
• Helland, Inge Svein; Sæbø, Solve; Almøy, Trygve & Rimal, Raju (2018). Model and estimators for partial least squares regression. Journal of Chemometrics.  ISSN 0886-9383.  32(9) . doi: 10.1002/cem.3044 Vis sammendrag

  Partial least squares (PLS) regression has been a very popular method for prediction. The method can in a natural way be connected to a statistical model, which now has been extended and further developed in terms of an envelope model. Concentrating on the univariate case, several estimators of the regression vector in this model are defined, including the ordinary PLS estimator, the maximum likelihood envelope estimator, and a recently proposed Bayes PLS estimator. These are compared with respect to prediction error by systematic simulations. The simulations indicate that Bayes PLS performs well compared with the other methods.

• Alfsen, Erik; Størmer, Fredrik Carl; Njå, Arild & Walløe, Lars (2018). A proposed tandem mechanism for memory storage in neurons involving magnetite and prions. Medical Hypotheses.  ISSN 0306-9877.  119, s 98- 101 . doi: 10.1016/j.mehy.2018.07.003
• Doosttalab, Ali; Dharmarathne, Suranga; Evans, Humberto Bocanegra; Hamed, Ali M.; Gorumlu, Serdar; Aksak, Burak; Chamorro, Leonardo P.; Tutkun, Murat & Castillo, Luciano (2018). Flow modulation by a mushroom-like coating around the separation region of a wind-turbine airfoil section. Journal of Renewable and Sustainable Energy.  ISSN 1941-7012.  10(4) . doi: 10.1063/1.5022819 Fulltekst i vitenarkiv.
• Wilson, Glen Matthew (2018). The eta-inverted sphere over the rationals. Algebraic and Geometric Topology.  ISSN 1472-2747.  18(3), s 1857- 1881 . doi: 10.2140/agt.2018.18.1857
• Dahl, Geir; Guterman, Alexander & Shteyner, Pavel (2018). Majorization for matrix classes. Linear Algebra and its Applications.  ISSN 0024-3795.  555, s 201- 221 . doi: 10.1016/j.laa.2018.06.003
• Agram, Nacira & Øksendal, Bernt (2018). Correction to: Stochastic Control of Memory Mean-Field Processes. Applied mathematics and optimization.  ISSN 0095-4616.  s 1- 2 . doi: 10.1007/s00245-018-9483-z
• Smith, Lisa; Kolaas, Jostein; Jensen, Atle & Sveen, Johan Kristian (2018). Investigation of surface structures in two phase wavy pipe flow by utilizing X-ray tomography. International Journal of Multiphase Flow.  ISSN 0301-9322. . doi: 10.1016/j.ijmultiphaseflow.2018.06.004
• Esters, Leonie; Breivik, Øyvind; Landwehr, Sebastian; ten Doeschate, Anneke; Sutherland, Graig; Christensen, Kai Håkon; Bidlot, Jean-Raymond & Ward, Brian (2018). Turbulence Scaling Comparisons in the Ocean Surface Boundary Layer. Journal of Geophysical Research - Oceans.  ISSN 2169-9275.  123(3) . doi: 10.1002/2017JC013525
• Erhardt, André H (2018). Bifurcation Analysis of a Certain Hodgkin-Huxley Model Depending on Multiple Bifurcation Parameters. Mathematics.  ISSN 2227-7390.  6(6), s 1- 15 . doi: 10.3390/math6060103
• Binde, Caroline Ditlev; Tvete, Ingunn Fride; Gåsemyr, Jørund Inge; Natvig, Bent & Klemp, Marianne (2018). A multiple treatment comparison meta-analysis of monoamine oxidase type B inhibitors for Parkinson's disease. British Journal of Clinical Pharmacology.  ISSN 0306-5251.  84(9), s 1917- 1927 . doi: 10.1111/bcp.13651 Fulltekst i vitenarkiv.
• Hu, Yaozhong & Øksendal, Bernt (2018). Linear Volterra backward stochastic integral equations. Stochastic Processes and their Applications.  ISSN 0304-4149. . doi: 10.1016/j.spa.2018.03.016
• Feinberg, Jonathan; Eck, Vinzenz Gregor & Langtangen, Hans Petter (2018). Multivariate polynomial chaos expansions with dependent variables. SIAM Review.  ISSN 0036-1445.  40(1), s A199- A223 . doi: 10.1137/15M1020447
• Fazeres-Ferradosa, Tiago; Taveira-Pinto, Francisco; Vanem, Erik; Reis, Maria Teresa & das Neves, Luciana (2018). Asymmetric copula-based distribution models for met-ocean data in offshore wind engineering applications. Wind Engineering : The International Journal of Wind Power.  ISSN 0309-524X.  42(4), s 304- 334 . doi: https://doi.org/10.1177/0309524X187773
• Fazeres-Ferradosa, Tiago; Taveira-Pinto, Francisco; Romao, X.; Vanem, Erik; Reis, Maria Teresa & das Neves, Luciana (2018). Probabilistic design and reliability analysis of scour protections for offshore windfarms. Engineering Failure Analysis.  ISSN 1350-6307.  91, s 291- 305 . doi: 10.1016/j.engfailanal.2018.04.035
• Brandsæter, Andreas & Vanem, Erik (2018). Ship speed prediction based on full scale sensor measurements of shaft thrust and environmental conditions. Ocean Engineering.  ISSN 0029-8018.  162, s 316- 330 . doi: 10.1016/j.oceaneng.2018.05.029
• Dumitrescu, Roxana; Øksendal, Bernt & Sulem, Agnès (2018). Stochastic Control for Mean-Field Stochastic Partial Differential Equations with Jumps. Journal of Optimization Theory and Applications.  ISSN 0022-3239.  176(3), s 559- 584 . doi: 10.1007/s10957-018-1243-3
• Palma, Rui Miguel Coutinho (2018). Crossed products by Hecke Pairs. Memoirs of the American Mathematical Society.  ISSN 0065-9266.  252(1204), s 1- 156 . doi: 10.1090/memo/1204
• Bitner-Gregersen, Elzbieta M.; Vanem, Erik; Gramstad, Odin; Hørte, Torfinn; Aarnes, Ole Johan; Reistad, Magnar; Breivik, Øyvind; Magnusson, Anne Karin & Natvig, Bent (2018). Climate change and safe design of ship structures. Ocean Engineering.  ISSN 0029-8018.  149, s 226- 237 . doi: 10.1016/j.oceaneng.2017.12.023
• Ranestad, Kristian; Gallet, Matteo & Villamizar, Nelly (2018). Varieties of apolar subschemes of toric surfaces. Arkiv för matematik.  ISSN 0004-2080.  56(1), s 73- 99
• Hamilton, Nicholas; Viggiano, Bianca; Calaf, Marc; Tutkun, Murat & Cal, Raúl Bayoán (2018). A generalized framework for reduced-order modeling of a wind turbine wake. Wind Energy.  ISSN 1095-4244.  21(6), s 373- 390 . doi: 10.1002/we.2167
• Mossige, Endre Joachim; Jensen, Atle & Mielnik, Michal Marek (2018). Separation and Concentration without Clogging Using a High-Throughput Tunable Filter. Physical Review Applied.  ISSN 2331-7019.  9(5) . doi: 10.1103/PhysRevApplied.9.054007 Fulltekst i vitenarkiv. Vis sammendrag

  We present a detailed experimental study of a hydrodynamic filtration microchip and show how chip performance can be tuned and clogging avoided by adjusting the flow rates. We demonstrate concentration and separation of microspheres at throughputs as high as 29  ml/min and with 96% pureness. Results of streakline visualizations show that the thickness of a tunable filtration layer dictates the cutoff size and that two different concentration mechanisms exist. Particles larger than pores are concentrated by low-velocity rolling over the filtration pillars, while particles smaller than pores are concentrated by lateral drift across the filtration layer. Results of microscopic particle image velocimetry and particle-tracking velocimetry show that the degree of lateral migration can be quantified by the slip velocity between the particle and the surrounding fluid. Finally, by utilizing differences in inertia and separation mode, we demonstrate size-based separation of particles in a mixture

• Smith, Lisa; Kolaas, Jostein; Jensen, Atle & Sveen, Johan Kristian (2018). X-ray measurements of plunging breaking solitary waves. European journal of mechanics. B, Fluids.  ISSN 0997-7546. . doi: 10.1016/j.euromechflu.2018.03.007
• Georgiev, Ivan; Kristiansen, Lars & Stephan, Frank (2018). Subrecursive Approximations of Irrational Numbers by Variable Base Sums. arXiv.org.  ISSN 2331-8422.
• Kristiansen, Lars & Murwanashyaka, Juvenal (2018). Notes on Fragments of First-Order Concatenation Theory. arXiv.org.  ISSN 2331-8422.
• Trulsen, Karsten (2018). Rogue Waves in the Ocean, the Role of Modulational Instability, and Abrupt Changes of Environmental Conditions that Can Provoke Non Equilibrium Wave Dynamics, In Manuel G. Velarde; Roman Yu. Tarakanov & Alexey V. Marchenko (ed.),  The Ocean in Motion.  Springer.  ISBN 978-3-319-71934-4.  Chapter.  s 239 - 247
• Kristiansen, Lars; Stephan, Frank & Georgiev, Ivan (2018). On General Sum Approximations of Irrational Numbers. Lecture Notes in Computer Science.  ISSN 0302-9743.  10936, s 194- 203 . doi: 10.1007/978-3-319-94418-0_20
• Floater, Michael S. & Sande, Espen (2018). Optimal spline spaces for L2 n-width problems with boundary conditions. Constructive approximation.  ISSN 0176-4276. . doi: 10.1007/s00365-018-9427-5 Fulltekst i vitenarkiv.
• Brualdi, R.A. & Dahl, Geir (2018). Alternating sign matrices, related (0,1)-matrices, and the Smith normal form. Linear Algebra and its Applications.  ISSN 0024-3795.  s 1- 19 . doi: 10.1016/j.laa.2018.03.027 Fulltekst i vitenarkiv.
• Brualdi, R.A. & Dahl, Geir (2018). The interval structure of (0,1)-matrices. Discrete Applied Mathematics.  ISSN 0166-218X. . doi: 10.1016/j.dam.2018.03.024
• Brualdi, R.A. & Dahl, Geir (2018). Alternating Sign Matrices and Hypermatrices, and a Generalization of Latin Squares. Advances in Applied Mathematics.  ISSN 0196-8858.  95, s 116- 151 . doi: 10.1016/j.aam.2017.11.005
• Lien, Tonje Gulbrandsen; Borgan, Ørnulf; Reppe, Sjur; Gautvik, Kaare M & Glad, Ingrid Kristine (2018). Integrated analysis of DNA-methylation and gene expression using high-dimensional penalized regression: a cohort study on bone mineral density in postmenopausal women. BMC Medical Genomics.  ISSN 1755-8794.  11(24) . doi: 10.1186/s12920-018-0341-2
• Moslehian, Mohammad Sal; Størmer, Erling; Thorbjoernsen, Steen & Winslow, Carl (2018). Uffe Haagerup - his life and mathematics. Advances in Operator Theory.  ISSN 2538-225X.  3(1), s 295- 325 . doi: 10.22034/AOT.1708-1213
• Simanesew, Abushet; Krogstad, Harald E; Trulsen, Karsten & Nieto Borge, Jose Carlos (2018). Bimodality of directional distributions in ocean wave spectra: A comparison of data-adaptive estimation techniques. Journal of Atmospheric and Oceanic Technology.  ISSN 0739-0572.  35(2), s 365- 384 . doi: 10.1175/JTECH-D-17-0007.1 Fulltekst i vitenarkiv.
• Malacarne, Sara (2018). Woronowicz Tannaka-Krein duality and free orthogonal quantum groups. Mathematica Scandinavica.  ISSN 0025-5521.  122, s 151- 160 . doi: 10.7146/math.scand.a-97320 Fulltekst i vitenarkiv.

Se alle arbeider i Cristin

• Fenstad, Jens Erik (2018). Structure and Algoritms - Mathematics and the Nature of Knowledge. Springer Nature.  ISBN 978-3-319-72973-2.  134 s.

Se alle arbeider i Cristin

• Lindstrøm, Tom Louis (2018). Matematikk og virkelighet. Om å beregne det som ikke kan måles..
• Lindstrøm, Tom Louis (2018). Spillteori.
• Lindstrøm, Tom Louis (2018). Dybdelæring - er det noe nytt?.
• Natvig, Bent; Hagelund, Helge & Osen, Kirsten K. (2018). Under trusselen om utslettelse. Vårt land.  ISSN 0805-5424.  74(232), s 17- 17
• Carlson, Andreas (2018). Fluctuation assisted spreading of a fluid filled elastic blister.
• Lindstrøm, Tom Louis (2018). Calculus: The Mathematics of Change in a Changing World.
• Lindstrøm, Tom Louis (2018). Korteste vei.
• Ottem, John Christian (2018). Integral hodge conjecture for holomorphic symplectic varieties.
• Ottem, John Christian (2018). Integral Hodge conjecture for threefolds.
• Ottem, John Christian (2018). The integral Hodge conjecture for threefolds.
• Ottem, John Christian (2018). Positivity of the higher codimension cycles.
• Ottem, John Christian (2018). Integral Hodge conjecture for threefolds.
• Agram, Nacira (2018). SPDEs with space-mean dynamics.
• Agram, Nacira (2018). Introduction on stochastic control for Lévy processes and applications to recursive utilities and dynamic risk measure.
• Agram, Nacira (2018). Stochastic control for Volterra dynamics.
• Normann, Dag (2018). Functionals of Type 3 as Realisers of Classical Theorems in Analysis.
• Øksendal, Bernt (2018). New approach to optimal control of stochastic Volterra equations.
• Øksendal, Bernt (2018). Model uncertainty stochastic mean-field control.
• Øksendal, Bernt (2018). Introduction to optimal stochastic control with inside information.
• Øksendal, Bernt (2018). Introduction to stochastic control with jump diffusions and applications to finance.
• Rabault, Jean; Jensen, Atle; Sutherland, Graig & Christensen, Kai Håkon (2018). An investigation into the interaction between waves and ice.
• Rabault, Jean; Kolaas, Jostein & Jensen, Atle (2018). Using modern Artificial Neural Networks for performing end-to-end Particle Image Velocimetry.
• Rabault, Jean; Sutherland, Graig & Jensen, Atle (2018). Novel Field and Laboratory Observations of Wave-ice Interactions in Various Sea Ice Types.
• Kristiansen, Lars (2018). On General Sum Approximations of Irrational Numbers..
• Kristiansen, Lars (2018). Decidable and Undecidable Fragments of First-Order Concatenation Theory..
• Kristiansen, Lars (2018). On b-adic Representations of Irrational Numbers..
• Kristiansen, Lars (2018). First-order concatenation vs. first-order number theory..
• Dahl, Geir; Andrade, Enide & Ciardo, Lorenzo (2018). Combinatorial Perron Parameters and Trees.
• Dahl, Geir & Brualdi, R.A. (2018). Alternating Sign Matrices, Polyhedra and Majorization.
• Lindstrøm, Tom Louis (2018). Kjerneelementer - på vei mot nye læreplaner.
• Lindstrøm, Tom Louis (2018). Nytt innhold i skolen: Matematikk.
• Lindstrøm, Tom Louis (2018). Komplekse tall.
• Lindstrøm, Tom Louis (2018). Mathematics and reality: On calculating what cannot be measured.

Se alle arbeider i Cristin