Search Results - "HALVORSEN, Gunnar"

Major Contribution from Littoral Crustaceans to Zooplankton Species Richness in Lakes by Bjørn Walseng, Hessen, Dag O., Gunnar Halvorsen, Ann Kristin Schartau

“…A study of pelagic and littoral species richness among microcrustaceans in 2,466 Norwegian lakes recorded 120 crustacean species: 77 cladocerans, 31…”
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First results from a simplified Elkem Solar route—Input to tolerance limits by Søiland, Anne-Karin, Dolmen, Marit G., Heide, Johan, Thisted, Ulrik, Halvorsen, Gunnar, Ausland, Geir, Friestad, Kenneth, Preis, Pirmin, Peter, Kristian, Graf, Oliver, Bartel, Til, Tronstad, Ragnar

“…Elkem Solar has worked with a simplification of their metallurgical refining route for Solar Grade silicon.This involves removing the two last process steps,…”
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Some physical and chemical characteristics of Lake Atnsjøen: The Atna River: studies in an alpine-boreal watershed by HALVORSEN, Gunnar

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Two species of Alona (Cladocera, Chydoridae) new for Norway by Gunnar Halvorsen

“…The occurrence of two species of Alona, A. karelica Stenroos and A. weltneri Keilhack, new to Norway is noted and some environmental data provided. Some…”
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Some physical and chemical characteristics of Lake Atnsjøen by Halvorsen, Gunnar

“…Issue Title: The Atna River: Studies in an Alpine-Boreal Watershed The physical and chemical characteristics of the dimictic, ultraoligotrophic, and subalpine…”
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The phytoplankton of Lake Atnsjøen, Norway: a long-term investigation: The Atna River: studies in an alpine-boreal watershed by BRETTUM, Pal, HALVORSEN, Gunnar

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Convergence of a discretization of the Maxwell–Klein–Gordon equation based on finite element methods and lattice gauge theory by Christiansen, Snorre H., Halvorsen, Tore G., Scheid, Claire

“…The Maxwell–Klein–Gordon equations are a set of coupled nonlinear time‐dependent wave equations, used to model the interaction of an electromagnetic field with…”
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Manifestly gauge invariant discretizations of the Schrödinger equation by Halvorsen, Tore Gunnar, Kvaal, Simen

“…Grid-based discretizations of the time dependent Schrödinger equation coupled to an external magnetic field are converted to manifest gauge invariant…”
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The phytoplankton of Lake Atnsjøen, Norway – a long-term investigation by Brettum, Pål, Halvorsen, Gunnar

“…Issue Title: The Atna River: Studies in an Alpine-Boreal Watershed Quantitative samples were collected from Lake Atnsjøen five times per year in the growth…”
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Zooplankton in Lake Atnsjøen 1985-1997: The Atna River: studies in an alpine-boreal watershed by HALVORSEN, Gunnar, DERVO, Børre K, PAPINSKA, Katarzyna

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Zooplankton in Lake Atnsjøen 1985–1997 by Halvorsen, Gunnar, Dervo, Børre K., Papinska, Katarzyna

“…Issue Title: The Atna River: Studies in an Alpine-Boreal Watershed The aim of this paper is to study long-term changes in the zooplankton of a subalpine…”
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Simplicial gauge theory and quantum gauge theory simulation by Halvorsen, Tore Gunnar, Sørensen, Torquil Macdonald

“…We propose a general formulation of simplicial lattice gauge theory inspired by the finite element method. Numerical tests of convergence towards continuum…”
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Simplicial gauge theory on spacetime by Halvorsen, Tore Gunnar, Sørensen, Torquil Macdonald

“…We define a discrete gauge-invariant Yang–Mills–Higgs action on spacetime cylindrical meshes with simplicial spatial base. The formulation is a generalization…”
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Introduction to the Atna research area by Tvede, Arve M., Halvorsen, Gunnar

“…Issue Title: The Atna River: Studies in an Alpine-Boreal Watershed…”
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Littoral microcrustaceans (Cladocera and Copepoda) as indices of recovery of a limed water system by WALSENG, Bjørn, HALVORSEN, Gunnar, SLOREID, Svein-Erik

“…A 7 year study (1992-1998) of littoral microcrustaceans (Cladocera and Copepoda) in the watercourse of the River Rore, South Norway, illustrates that…”
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Discretizing the Maxwell-Klein-Gordon equation by the lattice gauge theory formalism by CHRISTIANSEN, Snorre H, HALVORSEN, Tore Gunnar

“…In this article we study the discretization of the Maxwell-Klein-Gordon equation from a variational point of view. We first solve the problem with an action…”
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Convergence of lattice gauge theory for Maxwell’s equations by Christiansen, Snorre H., Halvorsen, Tore Gunnar

“…In this article we prove convergence of Lattice Gauge Theory in the energy norm for electromagnetism, which corresponds to gauge group U(1). This is done by…”
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Convergence of lattice gauge theory for Maxwell's equations by Christiansen, Snorre H, Halvorsen, Tore Gunnar

“…Inneholder sammendrag…”
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Second order gauge invariant discretizations to the Schr\"odinger and Pauli equations by Christiansen, Snorre Harald, Halvorsen, Tore Gunnar

“…We introduce a numerical method, based on finite elements and lattice gauge theory, to compute approximate solutions to Schr\"odinger and Pauli equations. The…”
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Acanthodiaptomus Tibetanus Daday, 1908 (Copepoda, Calanoida, Diaptomidae): New Records of a Very Rare Species by Walseng, Bjørn, Halvorsen, Gunnar, Huru, Helge, Nøst, Terje, Lien Schartau, Ann Kristin

“…In 1992 Acanthodiaptomus tibetanus was found in material from northern Norway sampled in 1979, 1992, and 1993, and in 1992 also in Sør-Trøndelag, Central…”
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