TY - JOUR A1 - Mishra, Kirti Bhushan A1 - Wehrstedt, Klaus-Dieter T1 - "Deviceless" self-sustained oscillatory diffusive burning of TBPB and hybrid fuels N2 - An extraordinary deviceless self-sustained oscillatory diffusive burning is observed in tert-butyl peroxybenzoate (TBPB) (technical pure) and hybrid fuel, i.e., TBPB and kerosene (both 50%) flames when burned in form of pool fires. Such oscillations or more precisely self-sustained deviceless control of mass burning (flow) is not reported till date. Generally, devices comprising electronic control system and/or mechanical means (valves) are necessary to produce such oscillatory burning or control of fuel flow. This unique oscillation is strongly recorded for pool diameters of 6 cm ≤ d ≤ 11 cm beyond which the effect was weakened and unseen (hid) visually. The fuel regression (loss) takes place in irregular time steps and is formulated in form of a step function. The variation in fuel mass burning rates, visible flame lengths and radiation heat fluxes with time are measured as respective representatives of oscillations. The periodicity in the strongest oscillations in relative visible flame lengths is investigated and the measured data are found to be best fitted in sinusoidal form. Both, chemical and thermal effects are shown to be possibly responsible for such effects. Furthermore, a theory is offered to characterise similar effect showing fuels. KW - Self-sustained KW - Oscillatory burning KW - TBPB KW - Kerosene KW - Diffusion flame KW - Flow rate control PY - 2013 U6 - https://doi.org/10.1016/j.fuproc.2013.07.010 SN - 0016-2361 SN - 0378-3820 SN - 1873-7153 VL - 116 SP - 339 EP - 345 PB - Elsevier B.V. CY - Amsterdam AN - OPUS4-29013 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Sojref, Regine ED - Pratsinis, S. E. T1 - "Donut like flow pattern" attrition milling of submicron corundum powder T2 - PARTEC 2004 ; International Congress for Particle Technology CY - Nuremberg, Germany DA - 2004-03-16 PY - 2004 SP - 1 EP - 4(?) PB - Nürnberg Messe GmbH CY - Nürnberg AN - OPUS4-6950 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Sojref, Regine T1 - "Donut like flow pattern" attrition milling of submicron corundum powder T2 - PARTEC 2004 CY - Nuremberg, Germany DA - 2004-04-16 PY - 2004 AN - OPUS4-5964 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erning, Johann Wilhelm T1 - "Grabenkorrosion": From A historic scientific debate to the solution, still modern failures N2 - Grooving corrosion occured in the 1970ies. It returned in the 1990ies, causing a scientific debate leading to a solution. This solution got lost, so new failures appear. The route of the discussion to the solution is described, old and new failures are discussed. T2 - Eurocorr 2023 CY - Brussels, Belgium DA - 27.08.2023 KW - Grooving corrosion KW - Drinking water installations KW - Steel pipes PY - 2023 AN - OPUS4-58186 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erning, Johann Wilhelm T1 - "Grabenkorrosion": How scientific debate leads to an solution. And modern failures due to neglection of well described facts N2 - In the late 1980s, a new type of corrosion appeared in drinking water installations where galvanized steel pipes failed forming a deep groove with no corrosion at the other surfaces. The reason was discussed quite fiercely between failure analysts and material suppliers. In the end the discussion lead to the solution: inductive welded pipes of a certain sulphur content were prone to selective corrosion. The history of the arguments is discussed using old communications between Wilhelm Schwenk and Wolfgang Stichel, who later published the results in a paper unfortunately only I german. Thus the knowledge got lost and new cases based on the same material problems are observed in application of so-called C-Steel piping systems. Failure cases are shown. T2 - MTech 2023 CY - Cavtat, Croatia DA - 02.10.2023 KW - Corrosion KW - Grabenkorrosion PY - 2023 AN - OPUS4-58518 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Panne, Ulrich A1 - Gornushkin, Igor B. A1 - Riedel, Jens A1 - Schneider, Rudolf A1 - Emmerling, Franziska T1 - "Keine Dienstmagd" - Analytical Sciences in Action N2 - Analytical Sciences has developed from Ostwald’s “unentbehrlichen Dienstmagd” to a chemical discipline at the core of many of today’s fundamental and applied scientific problems and innovations. An atomic or molecular understanding of basic processes in chemistry, soft matter physics, materials and life science is enabled only through new analytical methods and instrumentation. Similar observations can be found for pressing sociopolitical conflicts of the future: A rational discussion of global climate change or new energy sources is only possible with reliable analytical results. Progress in Analytical Sciences is only possible if the underlying interdisciplinary character is acknowledged and valued. The talk will illustrate the scope of modern Analytical Science through examples from process analysis relevant to modern process intensification and industry 4.0 to bioanalysis and the use of synchrotron radiation to elucidate fundamental reactions materials. T2 - MChG Talk CY - Technische Universität München, Germany DA - 27.11.2018 KW - Analytical Sciences PY - 2018 AN - OPUS4-46940 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rhode, Michael A1 - Schaupp, Thomas A1 - Muenster, C. A1 - Mente, Tobias A1 - Boellinghaus, Thomas A1 - Kannengießer, Thomas T1 - "On how to influence your results" - A review on carrier gas hot extraction parameters for hydrogen determination in welded specimens N2 - Carrier gas hot extraction (CGHE) is a commonly applied technique for determination of hydrogen in welded joints using a thermal conductivity device (TCD) for quantitative measurement. The CGHE is based on the accelerated hydrogen effusion due to thermal activation at elevated temperatures. The ISO 3690 standard suggests different specimen geometries as well as necessary minimum extraction time vs. temperature. They have the biggest influence on precise hydrogen determination. The present study summarizes the results and experience of numerous test runs with different specimen temperatures, geometries and factors that additionally influence hydrogen determination. They are namely: specimen surface (polished/as-welded), limited TCD sensitivity vs. specimen volume, temperature measurement vs. effects of PID-furnace controller as well as errors due to insufficient data assessment. Summarized, the temperature is the driving force of the CGHE. Two different methods are suggested to increase the heating rate up the reach the desired extraction temperature without changing the experimental equipment. Suggestions are made to improve the reliability of hydrogen determination depended on the hydrogen signal stability during extraction accompanied by evaluation of the recorded data. Generally, independent temperature measurement with calibration specimens is useful for further data analysis, especially if this data is used for calculation of trapping kinetics by thermal desorption analysis (TDA). T2 - IIW Annual Assembly and International Conference 2018, Meeting of Commission II-E CY - Nusa Dua, Bali Island, Indonesia DA - 15.07.2018 KW - Carrier gas hot extraction (CGHE) KW - Welding KW - ISO 3690 KW - Hydrogen KW - Experimental design PY - 2018 AN - OPUS4-45520 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Trieflinger, C. A1 - Rurack, Knut A1 - Daub, J. T1 - "Turn ON/OFF your LOV light": Bordipyrromethen-Flavin-Dyaden als biomimetische, von der LOV-Domäne abgeleitete Schalter KW - Boron-dipyrromethene KW - Flavin KW - Thiol/disulfide KW - Fluorescence KW - Molecular switching KW - Photoreceptor mimicks PY - 2005 SN - 0044-8249 SN - 0932-2140 SN - 1521-3757 VL - 117 IS - 15 SP - 2328 EP - 2331 PB - Wiley-VCH CY - Weinheim AN - OPUS4-7305 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - VIDEO A1 - Pauw, Brian Richard T1 - "Ultima Ratio": Multi-scale, high-resolution 3D-FFT scattering pattern simulations N2 - This talk highlights a proof-of-concept that demonstrates the ability to calculate high-resolution Fourier transforms. These can be combined with multi-scale modeling to simulate scattering over a wide range, from small-angle scattering to XRD and PDF. The preprint documenting this is available on the ArXiv here: https://doi.org/10.48550/arXiv.2303.13435 The Jupyter notebook, VASP calculation details and MOUSE measured scattering patterns are available from this Zenodo repository: https://dx.doi.org/10.5281/zenodo.7764045 KW - Video KW - Simulation KW - High-resolution KW - Fourier Transform KW - 3D FFT KW - Nanomaterial KW - Metal organic framework KW - MOF KW - SAXS KW - XRD KW - PDF KW - X-ray diffraction KW - Pair distribution function KW - Small-angle X-ray scattering PY - 2023 UR - https://www.youtube.com/watch?v=lEApkOqR5e8 PB - YouTube, LLC CY - San Bruno, CA, USA AN - OPUS4-57212 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pauw, Brian Richard A1 - Laskina, Sofya A1 - Naik, Aakash Ashok A1 - Smales, Glen Jacob A1 - George, Janine A1 - Breßler, Ingo A1 - Benner, Philipp T1 - "Ultima Ratio": Simulating wide-range X-ray scattering and diffraction N2 - We demonstrate a strategy for simulating wide-range X-ray scattering patterns, which spans the small- and wide scattering angles as well as the scattering angles typically used for Pair Distribution Function (PDF) analysis. Such simulated patterns can be used to test holistic analysis models, and, since the diffraction intensity is on the same scale as the scattering intensity, may offer a novel pathway for determining the degree of crystallinity. The "Ultima Ratio" strategy is demonstrated on a 64-nm Metal Organic Framework (MOF) particle, calculated from Q < 0.01 1/nm up to Q < 150 1/nm, with a resolution of 0.16 Angstrom. The computations exploit a modified 3D Fast Fourier Transform (3D-FFT), whose modifications enable the transformations of matrices at least up to 8000^3 voxels in size. Multiple of these modified 3D-FFTs are combined to improve the low-Q behaviour. The resulting curve is compared to a wide-range scattering pattern measured on a polydisperse MOF powder. While computationally intensive, the approach is expected to be useful for simulating scattering from a wide range of realistic, complex structures, from (poly-)crystalline particles to hierarchical, multicomponent structures such as viruses and catalysts. KW - X-ray KW - Simulation KW - 3D Fourier Transform KW - High resolution KW - XRD KW - SAXS KW - PDF KW - Total scattering KW - X-ray scattering KW - Metal organic framework KW - Electron density map KW - FFT PY - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-572067 VL - Cornell University SP - 1 EP - 12 PB - Ithaca, NY AN - OPUS4-57206 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -