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Positions of individual trees in high-resolution aerial photographs are estimated by use of templates derived from an optical tree crown model and the geometry at image acquisition. The template is bounded by an ellipse, for which we ®nd the optimal size, eccentricity and translation along one axis. Tree top positions are estimated as local maxima of the(More)
NA topoisomerase (topo) II catalyses topological genomic changes essential for many DNA metabolic processes. It is also regarded as a structural component of the nuclear matrix in interphase and the mitotic chromosome scaffold. Mammals have two isoforms (␣ and ␤) with similar properties in vitro. Here, we investigated their properties in living and(More)
The genetic composition of marine microbial communities varies at the microscale between particle-associated (PA; >1.6 μm) and free-living (FL; 0.2-1.6 μm) niches. It remains unclear, however, how metabolic activities differ between PA and FL fractions. We combined rate measurements with metatranscriptomics to quantify PA and FL microbial activity in the(More)
DNA topoisomerase (topo) II catalyses topological genomic changes essential for many DNA metabolic processes. It is also regarded as a structural component of the nuclear matrix in interphase and the mitotic chromosome scaffold. Mammals have two isoforms (alpha and beta) with similar properties in vitro. Here, we investigated their properties in living and(More)
Eukaryotic DNA topoisomerase II is a dimeric nuclear enzyme essential for DNA metabolism and chromosome dynamics. It changes the topology of DNA by coupling binding and hydrolysis of two ATP molecules to the transport of one DNA duplex through a temporary break introduced in another. During this process the structurally and functionally complex enzyme(More)
To estimate positions of individual trees in high–resolution aerial photographs we use circular templates derived from an optical tree crown model and the geometry at image acquisition. A straight–forward analysis method consists of finding local maxima of the correlation function for the successively transposed templates over the whole image. Three ways of(More)
A method for detecting Spruce tree tops in high resolution panchromatic images at acute angles has earlier been reported. The method uses an optical tree model and flight data to generate a template tree image, i.e. an image of what the "average" tree would look like if placed at a certain point in the imaged scene. A window into the template image is(More)