TY - JOUR AB - This paper presents the results of an interlaboratory study of the rheological properties of cement paste and ultrasound gel as reference substance. The goal was to quantify the comparability and reproducibility of measurements of the Bingham parameters yield stress and plastic viscosity when measured on one specific paste composition and one particular ultrasound gel in different laboratories using different rheometers and measurement geometries. The procedures for both in preparing the cement paste and carrying out the rheological measurements on cement paste and ultrasound gel were carefully defined for all of the study’s participants. Different conversion schemes for comparing the results obtained with the different measurement setups are presented here and critically discussed. The procedure proposed in this paper ensured a reasonable comparability of the results with a coefficient of variation for the yield stress of 27% and for the plastic viscosity of 24%, despite the individual measurement series’ having been performed in different labs with different rheometers and measurement geometries. AU - Haist, Michael AU - Link, Julian AU - Nicia, David AU - Leinitz, Sarah AU - Baumert, Christian AU - von Bronk, Tabea AU - Cotardo, Dario AU - Eslami Pirharati, Mahmoud AU - Fataei, Shirin AU - Garrecht, Harald AU - Gehlen, Christoph AU - Hauschildt, Inga AU - Ivanova, Irina AU - Jesinghausen, Steffen AU - Klein, Christopher AU - Krauss, Hans-W. AU - Lohaus, Ludger AU - Lowke, Dirk AU - Mazanec, Oliver AU - Pawelczyk, Sebastian AU - Pott, Ursula AU - Radebe, Nonkululeko W. AU - Riedmiller, Joachim Jürgen AU - Schmid, Hans-Joachim AU - Schmidt, Wolfram AU - Secrieru, Egor AU - Stephan, Dietmar AU - Thiedeitz, Mareike AU - Wilhelm, Manfred AU - Mechtcherine, Viktor ID - 21949 JF - Materials and Structures KW - Rheology KW - Wall Slip KW - Slip KW - apparent slip KW - suspension KW - cement KW - concrete SN - 1359-5997 TI - Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries ER - TY - JOUR AB - Since suspensions (e.g., in food, cement, or cosmetics industries) tend to show wall slip, the application of structured measuring surfaces in rheometers is widespread. Usually, for parallel-plate geometries, the tip-to-tip distance is used for calculation of absolute rheological values, which implies that there is no flow behind this distance. However, several studies show that this is not true. Therefore, the measuring gap needs to be corrected by adding the effective gap extension δ to the prescribed gap height H in order to obtain absolute rheological properties. In this paper, we determine the effective gap extension δ for different structures and fluids (Newtonian, shear thinning, and model suspensions that can be adjusted to the behavior of real fluids) and compare the corrected values to reference data. We observe that for Newtonian fluids a gap- and material-independent correction function can be derived for every measuring system, which is also applicable to suspensions, but not to shear thinning fluids. Since this relation appears to be mainly dependent on the characteristics of flow behaviour, we show that the calibration of structured measuring systems is possible with Newtonian fluids and then can be transferred to suspensions up to a certain particle content. AU - Pawelczyk, Sebastian AU - Kniepkamp, Marieluise AU - Jesinghausen, Steffen AU - Schmid, Hans-Joachim ID - 21948 JF - Materials KW - wall slip prevention KW - effective gap height KW - parallel-plate system KW - structured surfaces KW - model suspensions KW - cement paste KW - fresh concrete SN - 1996-1944 TI - Absolute Rheological Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention Measures ER - TY - JOUR AU - Gonchikzhapov, Munko AU - Kasper, Tina ID - 32490 IS - 18 JF - Industrial & Engineering Chemistry Research KW - Industrial and Manufacturing Engineering KW - General Chemical Engineering KW - General Chemistry SN - 0888-5885 TI - Decomposition Reactions of Fe(CO)5, Fe(C5H5)2, and TTIP as Precursors for the Spray-Flame Synthesis of Nanoparticles in Partial Spray Evaporation at Low Temperatures VL - 59 ER - TY - JOUR AU - Otroshi, M. AU - Rossel, Moritz Sebastian AU - Meschut, G. ID - 20691 JF - Journal of Advanced Joining Processes SN - 2666-3309 TI - Stress state dependent damage modeling of self-pierce riveting process simulation using GISSMO damage model ER - TY - CHAP AB - Als zeitgenössischer Komponist, dessen Werke von einem christlich-humanistischen Geist getragen werden, fühlt sich Stefan Heucke (*1959) unverkennbar der Tradition der deutschen Kunstmusik ab dem 18. Jahrhundert verpflichtet. Das Verzeichnis seiner Werke lässt Stefan Heucke mit den "Drei Liedern nach Gedichten von Georg Trakl" op. 1 beginnen, die Ende der 1970er Jahre entstanden sind. Spätestens seit Mitte der 1980er Jahre, als er mit der Uraufführung seiner "Vier Orchesterstücke" op. 5 beim "Forum junger deutscher Komponisten für Orchestermusik" ausgezeichnet wurde, ist Heucke als Komponist in der Öffentlichkeit präsent. Sein Werkkatalog ist seither auf annähernd 100 Kompositionen angewachsen, die eindrucksvoll belegen, dass er als Komponist die musikalischen Gattungen in ihrer Breite bedient: Opern und Oratorien stehen neben Sinfonien, Konzerten und geistlicher Musik ebenso wie Kammermusik und Liedern. AU - Höink, Dominik ED - Tadday, Ulrich ID - 36806 SN - 978-3-86916-829-6 T2 - Stefan Heucke TI - Komponierte Erinnerungskultur in traditioneller Form? Eine Annäherung an Stefan Heuckes Oratorium "Nikolaus Groß" op. 62 VL - 187 ER - TY - CHAP AU - Tumat, Antje ED - Wiesenfeldt, Christiane ID - 36823 SN - 978-3-7618-2071-1 T2 - Mendelssohn-Handbuch TI - Musik für das Theater ER - TY - JOUR AU - Niewöhner, Nadine AU - Asmar, Laban AU - Röltgen, Daniel AU - Kühn, Arno AU - Dumitrescu, Roman ID - 37122 JF - Procedia CIRP KW - General Medicine SN - 2212-8271 TI - The impact of the 4th industrial revolution on the design fields of innovation management VL - 91 ER - TY - CHAP AU - Schmidt, Jochen ED - Dockter, Cornelia ED - Dürnberger, Martin ED - Langefeld, Aaron ID - 36956 KW - Theologie KW - dialektik T2 - Theologische Grundbegriffe. Ein Handbuch TI - Dialektische Theologie ER - TY - BOOK AU - Schuh, Günther AU - Anderl, Reiner AU - Dumitrescu, Roman AU - Krüger, Antonio AU - ten Hompel, Michael ID - 37125 TI - Der Industrie 4.0 Maturity Index in der betrieblichen Anwendung. Aktuelle Herausforderungen, Fallbeispiele und Entwicklungstrends (acatech KOOPERATION) ER - TY - JOUR AB - Abstract Mathematics learning support centres (MLSC) are widely established and evaluated in English-speaking countries (such as the UK, Ireland and Australia). In most of these countries, several national surveys on MLSCs exist. They give an overview of the number of MLSCs as well as their characteristics in these countries. In Germany, there is a lack of studies on MLSCs and the landscape of MLSCs has not been described yet. This article presents basic information concerning counts of MLSCs and their characteristics at universities. Based on a three-step approach of analysing university homepages and additional personal contact via email or phone calls, we gathered typical MLSC features (e.g. staff quantities and qualification, opening and support hours, supported study programmes). We analysed 190 universities from a web-based register on study programmes. In total, we found 61 MLSCs located at 51 German universities. Another 16 support centres were specialized on mathematics didactics, which means they focussed on didactical and methodological support for preservice teacher students and often provided different teaching materials. Thirty-eight centres were located at universities (62.3%) and 23 MLSCs at universities of applied sciences and comparable universities (37.7%). The MLSCs were different in their sizes of staff and opening hours, and both the numbers of staff and the service hours differed greatly. The student groups MLSCs at German universities focus on differ concerning characteristics like study programme or semester. We will provide the main categories describing these groups. We seek to answer research questions concerning the characteristics of MLSCs in Germany and discuss the results compared to international findings. This information is useful for further international collaborative research, for example a standardized international survey. From a national perspective, these findings support networking and collaborations between the MLSCs as well. As some German MLSCs are facing financial cuts, these results might help in gaining additional funding. AU - Schürmann, Mirko AU - Gildehaus, Lara AU - Liebendörfer, Michael AU - Schaper, Niclas AU - Biehler, Rolf AU - Hochmuth, Reinhard AU - Kuklinski, Christiane AU - Lankeit, Elisa ID - 35712 IS - 2 JF - Teaching Mathematics and its Applications: An International Journal of the IMA KW - Education KW - General Mathematics SN - 0268-3679 TI - Mathematics learning support centres in Germany—an overview VL - 40 ER -