Blar i Vitenskapelige publikasjoner (TNIMN) på utgivelsesdato
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Covariate order tests for covariate effect
(Journal article; Peer reviewed, 2002)A new approach for constructing tests for association between a random right censored life time variable and a covariate is proposed. The basic idea is to first arrange the observations in increasing order of the covariate ... 
Ricci nilsoliton black holes
(Journal article; Peer reviewed, 2008)We follow a constructive approach and find higherdimensional black holes with Ricci nilsoliton horizons. The spacetimes are solutions to the Einstein equation with a negative cosmological constant and generalise therefore, ... 
Experimental and computational studies of turbulent mass transfer in a mixing channel
(Journal article; Peer reviewed, 2008)Experiments are carried out for passive mixing in order to obtain local mean and turbulent velocities and concentrations. The mixing takes place in a square channel with two inlets separated by a block. A combined PIV/PLIF ... 
Semialgebraic optimization of temperature compensation in a general switchtype negative feedback model of circadian clocks
(Journal article; Peer reviewed, 2008)Temperature compensation is an essential property of circadian oscillators which enables them to act as physiological clocks. We have analyzed the temperature compensating behavior of a generalized transcriptional–translational ... 
Photochemical synthesis of chrysenols
(Peer reviewed; Journal article, 200808)Chrysenols are formed together with other metabolites when chrysene is metabolized in living organisms. The principal metabolites are needed as pure compounds for reference materials and standards to study various aspects ... 
On computational linear semiinfinite programming
(Peer reviewed; Journal article, 200812) 
A multiplesource air quality control model achieving a standard, defined by a vectorvalued function
(Conference object, 200907)Earlier papers by Gustafson, Kortanek, Sweigart and others describe models for controlling air pollution, consisting of chemically inert pollutants like sulphur dioxide. It was assumed that the concentration contributions ... 
Revision of the Oriental species of the Bengalia peuhi speciesgroup (Diptera, Calliphoridae)
(Peer reviewed; Book; Journal article, 20091008)The Oriental species of the Bengalia peuhi speciesgroup are revised and their male genitalia illustrated by means of digital colour photography. A key to males is presented, complete synonymies are given for all the species ... 
Note on the invariant classification of vacuum type D spacetimes
(Journal article; Peer reviewed, 200912)We illustrate the fact that the class of vacuum type D spacetimes which are Inondegenerate are invariantly classified by their scalar polynomial curvature invariants. 
Alvamaja chlorometallica gen. n., sp. n. from Europe : the first metallic Rhinophoridae (Diptera)
(Journal article; Peer reviewed, 2010)Alvamaja chlorometallica gen. n., sp. n. is described from the southern part of Serbia. It has a perplexing combination of characters for an oestroid fly: green metallic body colour with silvery pollinosity; absence of ... 
Curvature operators and scalar curvature invariants
(Journal article; Peer reviewed, 2010)We continue the study of the question of when a pseudoRiemannain manifold can be locally characterised by its scalar polynomial curvature invariants (constructed from the Riemann tensor and its covariant deriva tives). ... 
Higher dimensional bivectors and classification of the Weyl operator
(Journal article; Peer reviewed, 2010)We develop the bivector formalism in higher dimensional Lorentzian spacetimes. We define the Weyl bivector operator in a manner consis tent with its boostweight decomposition. We then algebraically classify the Weyl ... 
Revision of the cluster flies of the Pollenia haeretica speciesgroup (Diptera, Calliphoridae)
(Journal article; Peer reviewed, 20100609)The Palaearctic Pollenia haeretica speciesgroup is revised. Two species make up the group: Pollenia haeretica Séguy, 1928 (Algeria, Tunisia, Italy) and Pollenia ibalia Séguy, 1930 (Morocco). Pollenia rungsi Séguy, 1953 ... 
Revision of the Bengalia spinifemorata speciesgroup (Diptera, Calliphoridae)
(Journal article; Peer reviewed, 2011)The Afrotropical Bengalia spinifemorata speciesgroup is revised and their male genitalia illustrated by means of digital colour photography. Six species are recognized and keyed, and their geographical distribution ... 
Discriminating the Weyl type in higher dimensions using scalar curvature invariants
(Journal article; Peer reviewed, 2011)We consider higher dimensional Lorentzian spacetimes which are currently of interest in theoretical physics. It is possible to algebraically classify any tensor in a Lorentzian spacetime of arbitrary dimensions using ... 
All metrics have curvature tensors characterised by its invariants as a limit: the ϵproperty
(Journal article; Peer reviewed, 2011)We prove a generalisation of the ϵproperty, namely that for any dimension and signature, a metric which is not characterised by its polynomial scalar curvature invariants, there is a frame such that the components of the ... 
A spacetime not characterized by its invariants is of aligned type II
(Journal article; Peer reviewed, 2011)By using invariant theory we show that a (higherdimensional) Lorentzian metric that is not characterised by its invariants must be of aligned type II; i.e., there exists a frame such that all the curvature tensors ... 
PseudoRiemannian VSI spaces
(Journal article; Peer reviewed, 2011)In this paper we consider pseudoRiemannian spaces of arbitrary sig nature for which all of their polynomial curvature invariants vanish (VSI spaces). We discuss an algebraic classification of pseudoRiemannian spaces ... 
A review of the monophyly and composition of the Bengaliinae with the description of a new genus and species, and new evidence for the presence of Melanomyinae in the Afrotropical Region (Diptera, Calliphoridae)
(Book; Peer reviewed, 2011)Mafikengia ciliata gen. nov., sp. nov. is described from South Africa and assigned to the subfamily Bengaliinae of the Calliphoridae. It is recognisable by its small size (4 mm), mostly yellow body, and a number of peculiar ... 
Inflation with stable anisotropic hair
(Journal article; Peer reviewed, 2011)Recently an inflationary model with a vector field coupled to the inflaton was proposed and the phenomenology studied for the Bianchi type I spacetime. It was found that the model demonstrates a counterexample to the ...