Nils T. Hagen

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Authorship credit for multi-authored scientific publications is routinely allocated either by issuing full publication credit repeatedly to all coauthors, or by dividing one credit equally among all coauthors. The ensuing inflationary and equalizing biases distort derived bibliometric measures of merit by systematically benefiting secondary authors at the(More)
Bibliometric counting methods need to be validated against perceived notions of authorship credit allocation, and standardized by rejecting methods with poor fit or questionable ethical implications. Harmonic counting meets these concerns by exhibiting a robust fit to previously published empirical data from medicine, psychology and chemistry, and by(More)
IN HIS EDITORIAL “A SCIENTIFIC APPROACH TO POLICY” (5 DECEMBER 2008, P. 1435), B. ALBERTS wrote that when dealing with complex political issues, policy-makers would benefit from applying the experiment-based, problem-solving approach of scientists and engineers. The suggestion that the complexity of intercellular and subcellular interactions is equivalent(More)
A collection of coauthored papers is the new norm for doctoral dissertations in the natural and biomedical sciences, yet there is no consensus on how to partition authorship credit between PhD candidates and their coauthors. Guidelines for PhD programs vary but tend to specify only a suggested range for the number of papers to be submitted for evaluation,(More)
Certain Mycoplasma spp. are pathogens of poultry, but little is known of the role of mycoplasmas in disease of birds of prey. Species-specific polymerase chain reactions (PCRs) for the detection of the poultry pathogens Mycoplasma gallisepticum, Mycoplasma imitans, Mycoplasma iowae, Mycoplasma meleagridis and Mycoplasma synoviae were therefore evaluated for(More)
A method for the isolation of Gardnerella vaginalis (Haemophilus vaginalis) is presented. Bacteria isolated from 48-hour cultures grown on human blood agar were identified by means of beta-hemolysis, colony morphology, sensitivity to antimicrobial agents, oxydase and catalase reactions. Thirty-eight clinical isolates and one test strain were examined for(More)
Genetic transformation was employed to attain exact identification of Eikenella corrodens and Cardiobacterium hominis. The two species appeared both homogeneous and without genetic affinity to each other or to species of Kingella, Neisseria, and Moraxella, as tested for by rather sensitive procedures with streptomycin- and spectinomycin-resistance markers.
Mycoplasmas are commensals and pathogens of different avian species, especially poultry and passeriforms. The role of mycoplasmas in raptors has not yet been completely determined, and especially not the possibility of vertical transmission. Therefore 424 raptor eggs were examined for the occurrence of mycoplasmas using culture, and 155 of these eggs with a(More)