Alexander Greß

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In this paper, we present a novel approach for parallel sorting on stream processing architectures. It is based on adaptive bitonic sorting. For sorting n values utilizing p stream processor units, this approach achieves the optimal time complexity O((n log n)/p). While this makes our approach competitive with common sequential sorting algorithms not only(More)
We have isolated from an American lobster (Homarus americanus) olfactory organ cDNA library a clone, lobG alphaS, with >70% identity to mammalian and arthropod G alphaS sequences. In genomic Southern blots, a fragment of lobG alphaS detected only one band, suggesting the lobsters have a single G alphaS gene. In brain and olfactory organ, lobG alphaS mRNA(More)
We have isolated from an American lobster (Homarus americanus) olfactory organ cDNA library a clone, hG alpha(q), with >80% identity to mammalian and arthropod G alpha(q) sequences. In brain and olfactory organ, hG alpha(q) mRNA was expressed predominantly in neurons, including virtually all the neuronal cell body clusters of the brain. G alpha(q) protein(More)
In this paper, we propose the utilization of a kd-tree based hierarchy as an implicit object representation. Compared to an octree, the kd-tree based hierarchy is superior in terms of adaptation to the object surface. In consequence, we obtain considerably more compact implicit representations especially in case of thin object structures. We describe a new(More)
We present a novel method for checking the intersection of polygonal models on graphics hardware utilizing its SIMD, occlusion query, and floating point texture capabilities. It consists of two stages: traversal of bounding volume hierarchies , thus quickly determining potentially intersecting sets of polygons, and the actual intersection tests, resulting(More)
In high energy physics the structure of matter is investigated through particle accelerator experiments where particle collisions (events) occur at such high energies that new particles are produced. Providing tools for interactive visual inspection of billions of such events occurring in an experiment in an intuitive way is a challenging task. In order to(More)
The next generation sequencing technologies produce unprecedented amounts of data on the genetic sequence of individual organisms. These sequences carry a substantial amount of variation that may or may be not related to a phenotype. Phenotypically important part of this variation often comes in form of protein-sequence altering (non-synonymous) single(More)
This paper presents an interactive visualization framework for heterogeneous geospatial data developed in context of an interdisciplinary research project that aims at the risk analysis of sea-dumped chemical weapons in the Baltic Sea. In the focus of the analysis are geophysical, hydrographical, geochemical, and biological data acquired on research cruises(More)