5,714 research outputs found
Das neue Wasserstofflabor der BAM Vortraege
No full textDieser Kolloquiumsband enthaelt sechs Vortraege, die aus Anlass der Einweihung des Wasserstofflabors der Bundesanstalt fuer Materialforschung und -pruefung (BAM) am 18. Oktober 2001 gehalten wurden. Die Themen waren: Wasserstoff - Kraftstoff fuer zukuenftige Antriebstechnologien (A. Jungk); Brennstoffzellenbus-Projekt der BVG (R. Lemke); Sicherheitsfragen der Wasserstofftechnik (U. Schmidtchen); Tribologisches Verhalten von CrNi-Staehlen in fluessigem Wasserstoff (W. Huebner); Kalibrierung von Wasserstoffsensoren (U. Banach); Vorstellung der Einrichtungen des Wasserstofflabors (T. Gradt).This volume contains six papers read on the occasion of the commissioning of the hydrogen laboratory of the BAM (Bundesanstalt fuer Materialforschung und -pruefung) on 18 October 2001. Subjects were: Hydrogen, a fuel for future propulsion technologies (A. Jungk); The BVG fuel cell bus project (R. Lemke); Safety aspects of the hydrogen technology (U. Schmidtchen); Tribological characteristics of CrNi steels in liquid hydrogen (W. Huebner); Calibration of hydrogen sensors (U. Banach); Introducing the hydrogen laboratory (T. Gradt).SIGLEAvailable from TIB Hannover: F02B1164 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Surface displacements and source parameters of the 2003 Bam (Iran) earthquake from Envisat advanced synthetic aperture radar imagery
No full textThe M w 6.6, 26 December 2003 Bam (Iran) earthquake was one of the first earthquakes for which Envisat advanced synthetic aperture radar (ASAR) data were available. Using interferograms and azimuth offsets from ascending and descending tracks, we construct a three-dimensional displacement field of the deformation due to the earthquake. Elastic dislocation modeling shows that the observed deformation pattern cannot be explained by slip on a single planar fault, which significantly underestimates eastward and upward motions SE of Bam. We find that the deformation pattern observed can be best explained by slip on two subparallel faults. Eighty-five percent of moment release occurred on a previously unknown strike-slip fault running into the center of Bam, with peak slip of over 2 m occurring at a depth of ∼5 km. The remainder occurred as a combination of strike-slip and thrusting motion on a southward extension of the previously mapped Bam Fault ∼5 km to the east
Surface ruptures and building damage of the 2003 Bam, Iran earthquake mapped by satellite synthetic apeerture radar interferometric correlation
No full textWe use the interferometric correlation from Envisat synthetic aperture radar (SAR) images to map the details of the surface ruptures related to the 26 December 2003 earthquake that devastated Bam, Iran. The main strike-slip fault rupture south of the city of Bam has a series of four segments with left steps shown by a narrow line of low correlation in the coseismic interferogram. This also has a clear expression in the field because of the net extension across the fault. Just south of the city limits, the surface strain becomes distributed over a width of about 500 m, probably because of a thicker layer of soft sedimentary material. Another fault north of Bam shows offset and low correlation over a wider zone in the interferograms, but it has no discrete surface rupture, possibly because of a net shortening across this fault. Taking the difference between the interferometric correlation for an interval including the earthquake and an interval before the earthquake separates the changes due to the earthquake from other effects in the partially vegetated city of Bam. We map the damage to buildings by measuring the change from high correlation to low correlation where buildings were destroyed by the earthquake
genome/bam-readcount: v1.0.1 Release
No full textThis release fixes:
Correct version is now reported with --version (only works with cloned source:
git clone -b v1.0.1 --single-branch [email protected]:genome/bam-readcount)
Usage message now includes cram_file as well as bam_file
The reviewers of the bam-readcount paper (in submission) had many thoughtful
suggestions for improving README.md and their comments also led to a new hands-on
tutorial for this release. Thank you
Integration of InSAR time series analysis and water vapour correction for mapping postseismic deformation after the 2003 Bam (Iran) Earthquake
No full textAtmospheric water-vapor effects represent a major limitation of interferometric synthetic aperture radar (InSAR) techniques, including InSAR time-series (TS) approaches (e.g., persistent or permanent scatterers and small-baseline subset). For the first time, this paper demonstrates the use of InSAR TS with precipitable water-vapor (InSAR TS + PWV) correction model for deformation mapping. We use MEdium Resolution Imaging Spectrometer (MERIS) near-infrafred (NIR) water-vapor data for InSAR atmospheric correction when they are available. For the dates when the NIR data are blocked by clouds, an atmospheric phase screen (APS) model has been developed to estimate atmospheric effects using partially water-vapor-corrected interferograms. Cross validation reveals that the estimated APS agreed with MERIS-derived line-of-sight path delays with a small standard deviation (0.3–0.5 cm) and a high correlation coefficient (0.84–0.98). This paper shows that a better TS of postseismic motion after the 2003 Bam (Iran) earthquake is achievable after reduction of water-vapor effects using the InSAR TS + PWV technique with coincident MERIS NIR water-vapor data
Competence Centre H2Safety@BAM - We build trust in hydrogen technologies
No full textDer Beraterkreis Gase wird regelmäßig von der Berufsgenossenschaft Rohstoffe und chemische Industrie, Bereich Prävention, organisiert. Die Veranstaltung dient dem Austausch zwischen Wissenschaft und Wirtschaft zu aktuellen sicherheitstechnischen Fragestellungen rund um Sauerstoff und Wasserstoff. In diesem Zusammenhang hat die BAM einen Überblick über ihre verschiedenen Aktivitäten des Kompetenzzentrums H2Safety@BAM vorgestellt, die sich in der gesamten Wasserstoffwertschöpfungskette wiederfinden. Darüber hinaus wurden die Planungen für den Ausbau der Prüfinfrastruktur auf dem Testgelände Technische Sicherheit der BAM vorgestellt. Es wurden auch die Ergebnisse des Projekts DELFIN zur Sicherheit von Druckgasspeichern, den Freisetzungsuntersuchungen von Flüssigwasserstoff sowie die Unterfeuerung entsprechender Kryospeicher und die Planungen zum Projekt ModuH2Pipe@BAM präsentiert. Den Abschluss bildeten die aktuellen Empfehlungen des Forschungsnetzwerkes Wasserstoff.The Gases Advisory Group is organized regularly by the Prevention Division of the German Employer's Liability Insurance Association for Raw Materials and the Chemical Industry. The event serves as an exchange between science and industry on current safety-related issues concerning oxygen and hydrogen. In this context, BAM presented an overview of its various activities of the competence center H2Safety@BAM, which are reflected in the entire hydrogen value chain. In addition, the plans for the expansion of the test infrastructure at BAM's Technical Safety Test Site were presented. The results of the DELFIN project on the safety of pressurized gas storage tanks, the release tests of liquid hydrogen as well as the underfiring of corresponding cryogenic storage tanks and the plans for the ModuH2Pipe@BAM project were also presented. The presentation concluded with the current recommendations of the Hydrogen Research Network
H2Safety@BAM
No full textOverview on the Competence Centre H2Safety@BAM including the following topics: current international developments regarding the market ramp up of hydrogen technologies, European policies, hydrogen market projections, etc
Competence Centre H2Safety@BAM
No full textPresentation of the Competence Centre H2Safety@BAM with all five competence field, representatives as well as its vision, mission, strategic goals and implementation plan
Applying the Coulomb Failure Function with an optimally oriented plane to the 2008 Mw 7.9 Wenchuan earthquake triggering
No full textThe Coulomb failure function (CFF) quantitatively describes static stress changes in secondary faults near the source fault of an earthquake. CFF can be employed to monitor how static stress transfers and then shed some light on the probability of successive events occurring around a source fault. In this paper we focus on the CFF and particularly on optimally oriented planes. We present a unified model to determine an optimally oriented plane and its corresponding Coulomb stress, then apply the model to the 2003 Mw 6.6 Bam (Iran) earthquake and the 2008 Mw 7.9 Wenchuan (China) earthquake, thereby checking its effectiveness. Our results show that spatial correlation between positive Coulomb stress changes and aftershocks are, for the 2003 Bam earthquake, 47.06% when elastic Coulomb stress changes are resolved on uniform planes and 87.53% when these are resolved on optimally oriented planes at depth; for the 2008 Wenchuan earthquake the correlations are 45.68% and 58.20%, respectively. It is recommended that account be taken of optimally oriented planes when drawing a Coulomb stress map for analyzing earthquake triggering effects
Safety Aspects for Hydrogen Technologies - H2Safety@BAM
No full textHydrogen is a central component of the energy transition and the European Green Deal for a climate-neutral Europe. To be able to achieve the targets defined by 2045, the EU and the German government have drafted a framework for action and are making long-term investments in research, development and the rapid implementation of innovative hydrogen technologies.
The conditions for a successful energy transition and the economic use of green hydrogen as a clean energy carrier are Hydrogen readiness and a rapid market ramp-up, as well as the establishment of the necessary value chains in the national and European framework. Reliable quality and safety standards are the prerequisite for ensuring safety of supply and environmental compatibility and for creating trust in these technologies.
BAM has bundled its expertise in the field of hydrogen technologies into a competence center H2Safety@BAM to create confidence in the technology and to support the hydrogen strategies of the German government and the EU. The topic of hydrogen has been current at BAM for more than one hundred years and is also currently the focus of numerous research and cooperation activities. The competence centre H2Safety@BAM and its vision of “We build trust in hydrogen technologies” will be presented with its many safety-related topics, which can be found throughout the entire hydrogen value chain. Two deep dives will present the results on projects dealing with the design-to-cost issue of classical pressurized gas storage containments and the consequences of the release of liquid hydrogen, which will be roughly compared to the release of ammonia
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