In Germany, the data of the Open Street Map project has become available as an alternative to proprietary road networks in commercial business geomatics software, and their customers are wondering whether the quality may be sufficient. This paper describes an implemented methodology to compare OSM street data with those of Navteq for all populated roads in Germany. As a unique feature, the presented methodology is based on a matching between the street objects of OSM and Navteq, and all steps are fully automated so that they can be applied to updated versions of both data sets.While there are considerable qualitative differences between regions, towns, and street categories, at a national level the relative completeness of objects, their relative precision and the relative completeness of names are high enough for maps. However, other attributes, which are needed for the computation of catchment areas, are still relatively incomplete.

Additive layer manufacturing (ALM) offers for production of parts and components for aeronautical applications potential cost benefits over conventional manufacturing routes. In particular, powder bed processes offer a high degree of design flexibility while enabling weight reduction due to topological optimisation. The quality and properties of the parts are strongly dependent on the powder quality which, in turn, is influenced by handling and storage of the powder. For this reasons an undefined contamination of atomised powder materials by oxygen and hydrogen has to be avoided. Aluminium-silicon powder was aged under atmosphere of different moistures and temperatures for defined duration. The effect of these environments as well as the effect of vacuum drying on the flowability was investigated. The morphology was evaluated by scanning electron microscope. The chemistry including oxygen content of the powder was measured by inductively coupled plasma optical emission spectrometry and hot fusion analysis.

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Molar Mass Determination on Polyamides and on Reaction Products from ε‐Caprolactam and Phenyl Glycidyl Ether Terminal groups (‐NH2, ‐COOH, ‐OH (‐OH from termination reaction with epoxides)) of aliphatic oligo‐ and polyamides were titrated to determine the corresponding molar masses. ε‐Caprolactam terminal groups were hydrolyzed to form ‐COOH permitting subsequent titration. The same samples were measured by using capillary viscometry, vapour pressure osmometry and size exclusion chromatography. It was shown that the molar masses obtained depend on the reaction process of the polyamide formation (anionic process with Na‐caprolactam as initiator and activated anionic process with Na‐caprolactam/N‐acetylcaprolactam as initiator) and on the analytical method used. Molar masses from titration of terminal groups correspond to molar masses from capillary viscometry in sulfuric acid as solvent.

ZUSAMMENFASSUNG:Es wurden Versuche zur Homopolymerisation von E-Caprolactam (CL) und Phenylglycidether (PGE) mit den Initiator/Beschleuniger-Systemen Na-Caprolactam/N-Acetylcaprolactam (NaCL/AcCL) und Na-Caprolactam/N-Acetylimidazol (NaCL/ AcImi) durchgefuhrt, um die fur eine mogliche Copolymerisation von CL und PGE geeigneten Reaktionsbedingungen zu ermitteln. CL und PGE wurden in unterschiedlichen molaren Verhaltnissen (CL : PGE = 1 : 5 bis 1 : 0,05) und bei Temperaturen zwischen 100 "C und 140 "C (max. 240 "C) in einer Eintopfreaktion polymerisiert.Die loslichen Produkte wurden mittels HPLC getrennt und spektroskopisch identifiziert. Die in Aceton unloslichen Produkte wurden mit IR-und NMR-Spektroskopie, Massenspektrometrie (MS) und Elementaranalyse untersucht. SUMMARYE-Caprolactam (CL) and phenyl glycidyl ether (PGE) were homopolymerized using the initiator/accelerator-systems Na-caprolactam/N-acetyl-caprolactam (NaCL/ AcCL) and Na-caprolactam/N-acetyl imidazole (NaCL/AcImi). In a one-pot reaction both monomers gave different oligomeric reaction products depending on the reaction temperature (100°C to 140°C, max. 240°C) but no regular copolymers. Soluble products were separated by HPLC and identified by means of spectroscopic methods. In acetone insoluble products were investigated by IR-and NMR-spectroscopy, mass spectrometry and elemental analysis.