Search Results - "Lundström, Niklas L. P."

Spatially Balanced Sampling through the Pivotal Method by Grafström, Anton, Lundström, Niklas L. P., Schelin, Lina

“…A simple method to select a spatially balanced sample using equal or unequal inclusion probabilities is presented. For populations with spatial trends in the…”
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Constrained growth flips the direction of optimal phenological responses among annual plants by Lindh, Magnus, Johansson, Jacob, Bolmgren, Kjell, Lundström, Niklas L. P, Brännström, Åke, Jonzén, Niclas

“…Phenological changes among plants due to climate change are well documented, but often hard to interpret. In order to assess the adaptive value of observed…”
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Dynamics and Management of Stage-Structured Fish Stocks by Meng, Xinzhu, Lundström, Niklas L. P., Bodin, Mats, Brännström, Åke

“…With increasing fishing pressures having brought several stocks to the brink of collapse, there is a need for developing efficient harvesting methods that…”
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Systems of variational inequalities in the context of optimal switching problems and operators of Kolmogorov type by Lundström, Niklas L. P., Nyström, Kaj, Olofsson, Marcus

“…In this paper we study the system where . A special case of this type of system of variational inequalities with terminal data occurs in the context of optimal…”
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How to find simple nonlocal stability and resilience measures by Lundström, Niklas L. P.

“…Stability of dynamical systems is a central topic with applications in widespread areas such as economy, biology, physics and mechanical engineering. The…”
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Meeting Yield and Conservation Objectives by Harvesting Both Juveniles and Adults by Lundström, Niklas L P, Loeuille, Nicolas, Meng, Xinzhu, Bodin, Mats, Brännström, Åke

“…Sustainable yields that are at least 80% of the maximum sustainable yield are sometimes referred to as "pretty good yields" (PGY). The range of PGY harvesting…”
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Systems of Fully Nonlinear Parabolic Obstacle Problems with Neumann Boundary Conditions by Lundström, Niklas L. P., Olofsson, Marcus

“…We prove the existence of a unique viscosity solution to certain systems of fully nonlinear parabolic partial differential equations with interconnected…”
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Management strategies for run-of-river hydropower plants: an optimal switching approach by Olofsson, Marcus, Önskog, Thomas, Lundström, Niklas L. P.

“…The mathematical theory for optimal switching is by now relatively well developed, but the number of concrete applications of this theoretical framework…”
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Estimates of Size of Cycle in a Predator-Prey System by Lundström, Niklas L. P., Söderbacka, Gunnar

“…We consider a Rosenzweig–MacArthur predator-prey system which incorporates logistic growth of the prey in the absence of predators and a Holling type II…”
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Growth of subsolutions to fully nonlinear equations in halfspaces by Lundström, Niklas L.P.

“…We characterize lower growth estimates for subsolutions in halfspaces of fully nonlinear partial differential equations on the formF(x,u,Du,D2u)=0 in terms of…”
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Estimates of $p$-harmonic functions in planar sectors by Lundström, Niklas L. P., Singh, Jesper

“…Suppose that p∈(1,∞], ν∈[1/2,∞), Sν= {(x1, x2)∈R2\{(0, 0)}:|φ|< π/2ν}, where φ is the polar angle of (x1, x2). Let R>0 and ωp(x) be the p-harmonic…”
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Pareto-efficient biological pest control enable high efficacy at small costs by Lundström, Niklas L.P., Zhang, Hong, Brännström, Åke

“…•We suggest how to find control strategies that optimally trade off between efficacy and profit.•We demonstrate our methodology on a pest–pathogen–crop…”
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Whirling frequencies and amplitudes due to deviations of generator shape by Lundstrom, Niklas L P, Aidanpaa, Jan-Olov

“…Earlier measurements in large synchronous generators indicate the existence of backward whirling motion, and also relatively large deviations of shape in both…”
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Dynamics in large generators due to oval rotor and triangular stator shape by Lundstrom, Niklas L P, Aidanpaa, Jan-Olov

“…Earlier measurements in large synchronous generators indicate the existence of complex whirling motion, and also deviations of shape in both the rotor and the…”
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Strong Maximum Principle and Boundary Estimates for Nonhomogeneous Elliptic Equations by Lundström, Niklas L.P., Olofsson, Marcus, Toivanen, Olli

“…We give a simple proof of the strong maximum principle for viscosity subsolutions of fully nonlinear nonhomogeneous degenerate elliptic equations on the form F…”
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Phragmén-Lindelöf Theorems and p-harmonic Measures for Sets Near Low-dimensional Hyperplanes by Lundström, Niklas L. P.

“…We prove estimates of a p -harmonic measure, p ∈( n − m , ∞ ], for sets in R n which are close to an m -dimensional hyperplane Λ⊂ R n , m ∈[0, n −1]. Using…”
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Systems of variational inequalities for non-local operators related to optimal switching problems: existence and uniqueness by Lundström, Niklas L. P., Nyström, Kaj, Olofsson, Marcus

“…In this paper we study viscosity solutions to the system min { - H u i ( x , t ) - ψ i ( x , t ) , u i ( x , t ) - max j ≠ i ( - c i , j ( x , t ) + u j ( x ,…”
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Dynamic consequences of electromagnetic pull due to deviations in generator shape by LUNDSTROM, Niklas L. P, AIDANPÄÄ, Jan-Olov

“…Results from earlier measurements on hydropower generators have indicated relatively large eccentricities and shape deviations in the rotor and stator. These…”
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Boundary estimates for solutions to operators of p-Laplace type with lower order terms by Avelin, Benny, Lundström, Niklas L.P., Nyström, Kaj

“…In this paper we study the boundary behavior of solutions to equations of the form∇⋅ A ( x ,∇ u )+ B ( x ,∇ u )=0, in a domain Ω ⊂ R n , assuming that Ω is a δ…”
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Estimates for p -harmonic functions vanishing on a flat by Lundström, Niklas L.P.

“…We study p -harmonic functions in a domain Ω ⊂ R n near an m -dimensional plane (an m -flat) Λ m , where 0 ≤ m ≤ n − 1 . In particular, let u be a positive p…”
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