TY - JOUR A1 - Robens-Radermacher, Annika A1 - Lacy Jr., T. E. A1 - Bednarcyk, B. A. A1 - Pineda, E. J. A1 - Arnold, S. M. A1 - Ricks, T. M. T1 - Solution of the nonlinear high-fidelity generalized method of cells micromechanics relations via order-reduction techniques JF - Mathematical Problems in Engineering N2 - The High-Fidelity Generalized Method of Cells (HFGMC) is one technique, distinct from traditional finite-element approaches, for accurately simulating nonlinear composite material behavior. In this work, the HFGMC global system of equations for doubly periodic repeating unit cells with nonlinear constituents has been reduced in size through the novel application of a Petrov-Galerkin Proper Orthogonal Decomposition order-reduction scheme in order to improve its computational efficiency. Order-reduced models of an E-glass/Nylon 12 composite led to a 4.8–6.3x speedup in the equation assembly/solution runtime while maintaining model accuracy. This corresponded to a 21–38% reduction in total runtime.Thesignificant difference in assembly/solution and total runtimes was attributed to the evaluation of integration point inelastic field quantities; this step was identical between the unreduced and order-reduced models. Nonetheless, order-reduced techniques offer the potential to significantly improve the computational efficiency of multiscale calculations. KW - High-Fidelity KW - Micromechanics KW - HFGMC PY - 2018 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-445303 DO - https://doi.org/10.1155/2018/3081078 SN - 1024-123X SN - 1563-5147 VL - 2018 SP - Article ID 3081078-1 EP - 11 PB - Hindawi Publishing Corporation CY - Kairo, Ägypten AN - OPUS4-44530 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Robens, E. A1 - Rübner, Katrin T1 - Gravimetrische Wasserdampfsorptions- und Feuchtemessung an Feststoffen - Eine Übersicht über Messverfahren und Normung T2 - 6. Workshop über die Charakterisierung von Feinteiligen und Porösen Festkörpern T2 - 6. Workshop über die Charakterisierung von Feinteiligen und Porösen Festkörpern CY - Bad Soden, Deutschland DA - 2002-11-14 PY - 2002 VL - 6 SP - 1(?) EP - 2(?) CY - Bad Soden AN - OPUS4-1992 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Robens, E. A1 - Rübner, Katrin T1 - Gravimetrische Wasserdampfsorptions- und Feuchtemessung an Feststoffen JF - GIT : Labor-Fachzeitschrift KW - Feuchte KW - Feuchtigkeit KW - Wasser KW - Sorption KW - Trocknung KW - Normung KW - Poren KW - Oberfläche PY - 2003 SN - 0016-3538 VL - 47 SP - 1046 EP - 1050 PB - GIT-Verlag CY - Darmstadt AN - OPUS4-2716 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Robens, E. A1 - Rübner, Katrin A1 - Staszczuk, P. A1 - Dabrowski, A T1 - Measurement of Water Vapour Sorption and Humidity - A Survey on Measuring Methods and Standards JF - ICTAC-News KW - Feuchte KW - Feuchtigkeit KW - Wasser KW - Sorption PY - 2005 SN - 1022-2510 VL - 38 IS - 1 SP - 39 EP - 46 AN - OPUS4-12050 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Robens, E. A1 - Rübner, Katrin A1 - Klobes, Peter A1 - Balköse, Gulsum Devrim ED - Okada, C.T. T1 - Water vapour sorption and humidity - a survey on measuring methods and standards T2 - Humidity sensors: types, nanomaterials and environmental monitoring N2 - Under environmental conditions water exists in all three classical States of matter: solid, liquid and gas. The water molecule is non-linear and therefore polar. In comparison with other liquids water has anomalous features; about 63 exceptional properties are recorded. This article starts with reviewing properties of water, typical occurrences and definitions such as relative and absolute humidity and moisture content. Water is present everywhere in nature and engineering; it may be helpful or harmful. The survey concerns both: atmospheric hygrometry and usual measuring methods of the moisture content of solids and liquids as well as water Sorption. The determination of the atmospheric humidity is among the more difficult problems in metrology. In contrast, humidity determination of materials is simple; however the definition of the dry state is difficult. Because water is bound at and in solids and liquids in many different ways it tums out that the humidity content of materials is difficult to define and to measure accurately. We provide a survey on the measuring methods, describe the most important ones and discuss advantages and accuracy. In the search for extraterrestrial water special remote measuring methods have been developed analysing the spectrum of electromagnetic radiation either of natural sources or produced by a probe and reflected. Spacious deposits have been detected photographically. In situ investigations are made using conventional methods. With regard to the problems of measurements, Standardisation of measuring methods and procedures is required. There exist many institutions, which are engaged in investigating the use of water and standardising measuring methods. In tabular form, we give a survey on existing Standards. PY - 2011 SN - 978-1-61209-246-1 N1 - Serientitel: Environmental remediation technologies, regulations and safety – Series title: Environmental remediation technologies, regulations and safety IS - Chapter 1 SP - 1 EP - 91 PB - Nova Science Publishers, Inc. CY - New York AN - OPUS4-26290 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dabrowski, A A1 - Robens, E. A1 - Klobes, Peter A1 - Meyer, Klaus A1 - Podkoscielny, P. T1 - Standardization of Methods for Characterizing the Surface Geometry of Solids JF - Particle & particle systems characterization N2 - Since a comprehensive survey published in 1999 [1] much work was done in standardizing measuring methods to characterize the surface geometry of dispersed and/or porous solids and to certify reference materials. The present paper is an extension of a short communication [2]. It gives a survey on existing standards and reports on new drafts and proposals. KW - Particle KW - Pore KW - Reference material KW - Standardization KW - Surface KW - Partikel KW - Poren KW - Oberfläche KW - Normung KW - Referenzmaterialien PY - 2003 DO - https://doi.org/10.1002/ppsc.200390037 SN - 0934-0866 SN - 1521-4117 VL - 20 IS - 5 SP - 311 EP - 322 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-5196 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Robens, E. A1 - Rübner, Katrin A1 - Staszczuk, P. A1 - Dabrowski, A T1 - Measurement of water vapour sorption and humidity T2 - XLVI. Meeting of the Polish Chemical Society and the Association of Engineers & Technicians of Chemical Industry T2 - XLVI. Meeting of the Polish Chemical Society and the Association of Engineers & Technicians of Chemical Industry CY - Lublin, Poland DA - 2003-09-15 PY - 2003 AN - OPUS4-4683 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Robens, E. A1 - Klobes, Peter A1 - Balköse, Gulsum Devrim A1 - Jayaweera, S. Amarasiri A. T1 - On the correct use of the terms "mass" and "weight" T2 - XII. Workshop über die Charakterisierung von feinteiligen und porösen Festkörpern T2 - XII. Workshop über die Charakterisierung von feinteiligen und porösen Festkörpern CY - Bad Soden, Germany DA - 2008-11-18 PY - 2008 AN - OPUS4-18079 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Robens, E. A1 - Balköse, Gulsum Devrim A1 - Rübner, Katrin T1 - Selected methods of humidity determination with emphasis to gravimetric methods T2 - 31th International Conference on Vacuum Microbalance Techniques T2 - 31th International Conference on Vacuum Microbalance Techniques CY - Izmir, Turkey DA - 2007-09-12 PY - 2007 AN - OPUS4-15811 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Robens, E. A1 - Rübner, Katrin A1 - Staszczuk, P. T1 - Gravimetric Measurement of Water Vapour Sorption, Moisture and Dry Mass JF - Journal of thermal analysis and calorimetry N2 - The gravimetric measurement of the moisture content of solids is discussed in comparison to other usual methods. Results of measurements of silica gel are reported. Furthermore, we inform on standardisation work. KW - Adsorption KW - Gravimetry KW - Humidity KW - Moisture content KW - Water vapour KW - Feuchte KW - Feuchtigkeit KW - Wasser KW - Sorption KW - Trocknung KW - Normung KW - Poren KW - Oberfläche PY - 2004 DO - https://doi.org/10.1023/B:JTAN.0000028043.06679.53 SN - 1388-6150 SN - 1418-2874 SN - 0368-4466 SN - 1572-8943 VL - 76 IS - 2 SP - 639 EP - 646 PB - Kluwer Academic Publ. CY - Dordrecht AN - OPUS4-4117 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rübner, Katrin A1 - Balköse, Gulsum Devrim A1 - Robens, E. T1 - Methods of humidity determination - Part II: Determination of material humidity JF - Journal of thermal analysis and calorimetry N2 - Part II covers the most common methods of measuring the humidity of solid material. State of water near solid surfaces, gravimetric measurement of material humidity, measurement of water sorption isotherms, chemical methods for determination of water content, measurement of material humidity via the gas phase, standardisation, cosmonautical observations are reviewed. KW - Adsorption KW - Humidity KW - Material humidity KW - Water PY - 2008 DO - https://doi.org/10.1007/s10973-008-9370-y SN - 1388-6150 SN - 1418-2874 SN - 0368-4466 SN - 1572-8943 VL - 94 IS - 3 SP - 675 EP - 682 PB - Kluwer Academic Publ. CY - Dordrecht AN - OPUS4-18785 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rübner, Katrin A1 - Balköse, Gulsum Devrim A1 - Robens, E. T1 - Methods of humidity determination - Part I: Hygrometry JF - Journal of thermal analysis and calorimetry N2 - Part I of the short survey covers definitions of air humidity and the respective measuring methods such as hygrometry, psychrometry, dew point measurement, LIDAR hygrometry and humidity sensors. Techniques based on property changes of matter with adsorbed moisture from air are reviewed. KW - Humidity KW - Hygrometry KW - Psychrometry KW - Water KW - Weather forecast PY - 2008 DO - https://doi.org/10.1007/s10973-008-9349-8 SN - 1388-6150 SN - 1418-2874 SN - 0368-4466 SN - 1572-8943 VL - 94 IS - 3 SP - 669 EP - 673 PB - Kluwer Academic Publ. CY - Dordrecht AN - OPUS4-18786 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Robens, E. A1 - Klobes, Peter A1 - Balköse, Gulsum Devrim A1 - Amarasiri, S. A1 - Jayaweera, A. T1 - On the terms mass and weight JF - Journal of thermal analysis and calorimetry N2 - A short survey is given on mass units and recommendations on the proper use of the notations mass and weight.Whereas mass is an inertial physical quantity in classical mechanics, weight is a force due to the gravitational field and depending on the geographic situation. KW - Atomic mass KW - Electron volt KW - Mass KW - Relative KW - Specific KW - Weight PY - 2008 DO - https://doi.org/10.1007/s10973-008-9353-z SN - 1388-6150 SN - 1418-2874 SN - 0368-4466 SN - 1572-8943 VL - 94 IS - 3 SP - 619 EP - 622 PB - Kluwer Academic Publ. CY - Dordrecht AN - OPUS4-18834 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -