TY - CONF A1 - Osterloh, Kurt A1 - Ewert, Uwe A1 - Zvizdic, D. A1 - Krstelj, V. T1 - Die EFNDT Arbeitsgruppe 5 'Öffentliche Sicherheit mit ZfP-Techniken' neu formiert N2 - Für die öffentliche Sicherheit wird gesorgt, indem Gefahren rechtzeitig entdeckt werden. Deren Ursprung kann im technischen oder menschlichen Versagen liegen, womit im englischen Sprachraum zwischen 'Safety' und 'Security' unterschieden wird. Hinsichtlich der Folgen verschwimmt aber dieser Unterschied, obwohl für deren Verhinderung unterschiedliche Zuständigkeiten existieren. Bezüglich des gemeinsamen Interesses und auch überlappender Methoden und Vorgehensweisen würden beide Seiten gewinnen können, wenn es eine Brücke zwischen ihnen gäbe. Eine solche zu schaffen hat sich die EFNDT Arbeitsgruppe (Working Group) 5 zur Aufgabe gestellt. Gestaltet werden soll sie durch gemeinsame Veranstaltungen und Seminaren, die zur Bildung von Konsortien und der Durchführung gemeinsamer Projekte führen sollen. T2 - DGZfP-Jahrestagung 2011 CY - Bremen, Germany DA - 03.05.2011 KW - EFNDT Working Group 5 KW - Technische und öffentliche Sicherheit KW - Gemeinsamkeiten in ZfP und öffentlicher Sicherheit KW - Brückenbildung zwischen Zuständigkeitsbereichen PY - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-250631 SN - 978-3-940283-33-7 VL - 127 SP - 1 EP - 5 PB - Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP) CY - Berlin AN - OPUS4-25063 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Osterloh, Kurt A1 - Fratzscher, Daniel A1 - Zscherpel, Uwe A1 - Ewert, Uwe A1 - Hasenstab, A. A1 - Bücherl, T. A1 - Schillinger, B. T1 - Partielle Tomographie mit Neutronen zur Beurteilung von Leimschichten in Holz N2 - Verleimte Holzproben wurden je nach Größe mit thermischen (ANTARES) bzw. schnellen Neutronen (NECTAR) an der Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II) der Technischen Universität München in Garching untersucht. Entweder ließen die durchstrahlbare Schichtdicke oder die eingeschränkte Strahlgeometrie es nicht zu, das Probenteil allseitig zu durchstrahlen. Um dennoch innere Strukturen wie Leimschichten zumindest mit einem eingeschränkten Winkelbereich tomographisch darzustellen, wurde mit Hilfe des Slice-Theorems erfolgreich rekonstruiert. Ein Brett von 2 cm Dicke wurde mit thermischen Neutronen erfolgreich untersucht, ein größeres mit schnellen. T2 - DGZfP-Jahrestagung 2011 CY - Bremen, Germany DA - 30.05.2011 KW - Neutronentomographie KW - Eingeschränkter Winkelbereich KW - Holz PY - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-250649 SN - 978-3-940283-33-7 VL - 127 SP - 1 EP - 6 PB - Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP) CY - Berlin AN - OPUS4-25064 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Osterloh, Kurt A1 - Fratzscher, Daniel A1 - Jechow, Mirko A1 - Bücherl, T. A1 - Schillinger, B. A1 - Hasenstab, A. A1 - Zscherpel, Uwe A1 - Ewert, Uwe T1 - Limited view tomography of wood with fast and thermal neutrons N2 - Neutrons are absorbed particularly by hydrogen containing materials so they can be used as a tool for visualising heterogeneous density distributions of organic materials. Penetration limits are set by the layer thicknesses and the neutron energies applied. In case of specimens with a flat shape the situation may be encountered that the object only could be penetrated in selected directions. In addition, the overall size may exceed the beam diameter and thus the viewing window if a certain region of interest should be studied by tomography without destroying the integrity of the specimen. This study shows the capabilities and limits of thermal and fast neutrons to investigate flat wooden specimens such as boards and girders by neutron tomography under such circumstances. Taking projections was impaired either by the limits of penetrability or by the total size of the object. As a consequence, projections were included for reconstruction only from a limited angular range of 90°. It could be shown that an approach based on the slice theorem was capable to visualise structural features along the beam directions while simply omitting the perpendicular ones without causing additional artefacts. Small samples with a thickness of up to 2 cm but several times broader could be studied with the ANTARES facility of the FRM II neutron source in Garching providing thermal neutrons while larger objects required a beam of higher energy as available in the NECTAR facility of the same institution. The fast (fission) neutrons (1.5 – 2 MeV) of this site allowed investigating an area of interest inside a girder with a cross section of 23.5 x 49 cm². Internal features such as inclusions could be detected as well as a heterogeneous density distribution in glue layers. T2 - International symposium on digital industrial radiology and computed tomography CY - Berlin, Germany DA - 20.06.2011 KW - Computed tomography KW - Slice theoreme KW - Limited angle tomography PY - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-250663 SN - 978-3-940283-34-4 VL - 128 SP - 1 EP - 5 PB - Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP) CY - Berlin AN - OPUS4-25066 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maierhofer, Christiane A1 - Ziegler, Mathias A1 - Kunert, M. A1 - Goldammer, M. T1 - Entwicklung von Referenzprobekörpern für die Standardisierung der Blitzthermografie N2 - Die aktive Thermografie wird in der Industrie zunehmend in verschiedenen Bereichen zur Qualitätssicherung, Zustandsdiagnose und Zustandsüberwachung eingesetzt. Bestehende Normen zur Thermografie beschreiben die Grundlagen, Geräte und Begriffe. In diesem Beitrag wird über ein Projekt berichtet, dessen Ziel die Erarbeitung einer Prüfnorm zur Blitzthermografie ist. Diese sollte neben der Auswahl geeigneter Gerätekomponenten, der Auswertungsverfahren und der Vorgehensweise bei der Prüfung auch die Beschreibung geeigneter Referenzprobekörper enthalten, die eine Bewertung der Messapparatur und eine Qualitätssicherung der Prüfung ermöglichen. T2 - Thermographie-Kolloquium 2011 CY - Stuttgart, Germany DA - 29.09.2011 KW - Aktive Thermografie KW - Blitzanregung KW - Prüfnorm KW - Referenzprobekörper PY - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-246230 SN - 978-3-940283-36-8 VL - 130 SP - 1 EP - 7 PB - Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP) CY - Berlin AN - OPUS4-24623 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Feigl, Michael A1 - Zietelmann, Christina A1 - Sabel, Martin A1 - Nofz, Marianne T1 - Electrochemical evaluation of corrosion behaviour of sol-gel alumina coated steel AlSl304 and Ni-base alloy Inconel-718 T2 - Eurocorr 2011 CY - Stockholm, Sweden DA - 05.09.2011 PY - 2011 AN - OPUS4-24870 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Liehr, Sascha A1 - Krebber, Katerina T1 - A dynamic fiber optic strain and power change sensor N2 - A dynamic and quasi-distributed sensor principle for simultaneous measurement of length changes and optical power changes between reflection points in an optical fiber is presented. The technique is based on the incoherent optical frequency domain reflectometry (I-OFDR). The calculation of phase and amplitude changes from few measurement points in the frequency domain yields precise and dynamic length and optical power change results up to 2 kHz and μm-resolution. Test results showing the deformation of a masonry building under seismic load are presented. Promising fields of application for this technique are the structural health monitoring sector and chemical process control. T2 - 21st International Conference on Optical Fiber Sensors CY - Ottawa, Canada DA - 15.05.2011 PY - 2011 AN - OPUS4-24930 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weller, Michael G. T1 - A unifying review of bioassay-guided fractionation, effect-directed analysis and related techniques N2 - The success of modern methods in analytical chemistry sometimes obscures the problem that the ever increasing amount of analytical data does not necessarily give more insight of practical relevance. As alternative approaches, toxicity- and bioactivity-based assays can deliver valuable information about biological effects of complex materials in humans, other species or even ecosystems. However, the observed effects often cannot be clearly assigned to specific chemical compounds. In these cases, the establishment of an unambiguous cause-effect relationship is not possible. Effect-directed analysis tries to interconnect instrumental analytical techniques with a biological/biochemical entity, which identifies or isolates substances of biological relevance. Successful application has been demonstrated in many fields, either as proof-of-principle studies or even for complex samples. This review discusses the different approaches, advantages and limitations and finally shows some practical examples. The broad emergence of effect-directed analytical concepts might lead to a true paradigm shift in analytical chemistry, away from ever growing lists of chemical compounds. The connection of biological effects with the identification and quantification of molecular entities leads to relevant answers to many real life questions. KW - Toxicity KW - Drug discovery KW - Natural products KW - Environmental analysis KW - Lead identification PY - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-262960 SN - 1424-8220 VL - 12 IS - 7 SP - 9181 EP - 9209 PB - MDPI CY - Basel AN - OPUS4-26296 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schukar, Marcus A1 - Krebber, Katerina A1 - Scheer, M. T1 - Faser-Bragg-Gitter-Sensoren überwachen Strahlung am Elektronenspeicherring BESSY II. N2 - Untersuchung der Eignung von FBG-Strahlungssensoren zur verteilten Überwachung auftretender ionisierender Strahlung an Elektronenspeicherringen. Test des Messverfahrens am Undulator U 49/1 des Elektronenspeicherrings BESSY II T2 - 8. Dresdner Sensorsymposium CY - Dresden, Germany DA - 10.02.2007 PY - 2007 AN - OPUS4-16291 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Farooq, M. U. A1 - Klement, U. A1 - Nolze, Gert T1 - EBSD and EDX analysis at the cladding - Substrate interface of a laser clad railway wheel N2 - Electron backscatter diffraction and energy-dispersive X-ray spectrometry were used to investigate the intermixed interface produced during laser cladding of a Co-Cr-Mo alloy on a steel substrate. A multi-component system and rapid solidification conditions together lead to a complex microstructure at the interface. The solidification of the cladding starts with the formation of an interface layer, which is about 75µm in thickness and consists of randomly oriented equiaxed grains of Co-Cr-Fe solid solution and martensite. Orientation analysis of the grains in the interface layer revealed that some grains have a special orientation relationship with the former austenite grains in the heat affected zone but the cladding is not formed by epitaxial growth on the substrate. Intermixing of the materials at the interface is providing a strong bond between the substrate and the cladding. For a grain from the interface layer to emerge as columnar grain in the cladding, it was determined that its <001> crystallographic direction is not supposed to deviate more than 25° from the sample normal direction. KW - EBSD KW - Laser cladding KW - Interface KW - Orientation KW - Nishiyama - Wassermann relationship PY - 2006 U6 - https://doi.org/10.3139/146.101413 SN - 1862-5282 VL - 97 IS - 11 SP - 1512 EP - 1518 PB - Hanser CY - München AN - OPUS4-14425 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wosniok, Aleksander A1 - Nöther, Nils A1 - Thiele, E. T1 - Dyke monitoring using fiber sensor-based geosynthetics N2 - Dyke breaks - caused by e.g. Overflows or Slop breaks during long lasting high water gauge - Play a great role in a failure potential of extreme flood Events. Using conventional dyke condition Monitoring dyke messengers can undertake only a visual surface inspection. Thus defective Areas can oftentimes be discovered too late. A critical area in which failures due to soil displacement and moisture Penetration become more significant is located at a landside dyke foot. Geotextiles are integrated here as a Drainage in case of modern three-zone type of dyke. T2 - European Symposium on Flood Risk Management Research (EFRM 2007) CY - Dresden, Germany DA - 26.02.2007 PY - 2007 AN - OPUS4-14571 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -