TY - JOUR
AU - Berger, Thomas
AU - Rauert, A.-L.
ID - 36349
JF - Automatica
TI - Funnel cruise control
VL - 119
ER -
TY - CHAP
AU - Berger, Thomas
AU - Huy Hoang, Le
AU - Reis, T.
ED - Grundel, S.
ED - Reis, T.
ED - Schöps, S.
ID - 36358
T2 - Progress in Differential-Algebraic Equations II
TI - Vector relative degree and funnel control for differential-algebraic systems
ER -
TY - CHAP
AU - Berger, Thomas
AU - Lanza, Lukas Johannes
ED - Grundel, S.
ED - Reis, T.
ED - Schöps, S.
ID - 36351
T2 - Progress in Differential-Algebraic Equations II
TI - Observers for differential-algebraic systems with Lipschitz or monotone nonlinearities
ER -
TY - CONF
AU - Lee, J.G.
AU - Berger, Thomas
AU - Trenn, S.
AU - Shim, H.
ID - 36380
T2 - Proceedings of the European Control Confrence 2020
TI - Utility of Edge-wise Funnel Coupling for Asymptotically Solving Distributed Consensus Optimization
ER -
TY - JOUR
AU - Schapeler, Timon
AU - Höpker, Jan Philipp
AU - Bartley, Tim
ID - 20156
JF - Optics Express
SN - 1094-4087
TI - Quantum detector tomography of a 2×2 multi-pixel array of superconducting nanowire single photon detectors
ER -
TY - JOUR
AU - Caruso, Carina
ID - 35936
JF - katholisch.de, Kolumne „Mein Religionsunterricht“.
TI - Schüler für ein Fach begeistern? Mit "Liebe" geht's!
ER -
TY - BOOK
AU - Neumann, Stefan
AU - Meschut, Gerson
AU - Fromm, Andreas
AU - Maier, Hans Jürgen
ID - 36835
SN - 978-3-86776-593-0
TI - Innovative Mischbauweisen mit dünnwandigen Aluminiumdruckguss-Strukturen mittels Bolzensetzen und fließlochformenden Schrauben
ER -
TY - BOOK
AU - Neumann, Stefan
AU - Meschut, Gerson
AU - Schmatz, Frederik
AU - Flüge, Wilko
ID - 36836
SN - 978-3-86776-601-2
TI - Robotergestütztes manuelles mechanisches Fügen
ER -
TY - CHAP
AU - Balsa, Carlos
AU - Cots, Olivier
AU - Gergaud, Joseph
AU - Wembe Moafo, Boris Edgar
ID - 33870
SN - 1876-1100
T2 - Lecture Notes in Electrical Engineering
TI - Minimum Energy Control of Passive Tracers Advection in Point Vortices Flow
ER -
TY - JOUR
AB - Helhmoltz–Kirchhoff equations of motions of vortices of an incompressible fluid in the plane define a dynamics with singularities and this leads to a Zermelo navigation problem describing the ship travel in such a field where the control is the heading angle. Considering one vortex, we define a time minimization problem which can be analyzed with the technics of geometric optimal control combined with numerical simulations, the geometric frame being the extension of Randers metrics in the punctured plane, with rotational symmetry. Candidates as minimizers are parameterized thanks to the Pontryagin Maximum Principle as extremal solutions of a Hamiltonian vector field. We analyze the time minimal solution to transfer the ship between two points where during the transfer the ship can be either in a strong current region in the vicinity of the vortex or in a weak current region. The analysis is based on a micro-local classification of the extremals using mainly the integrability properties of the dynamics due to the rotational symmetry. The discussion is complex and related to the existence of an isolated extremal (Reeb) circle due to the vortex singularity. The explicit computation of cut points where the extremal curves cease to be optimal is given and the spheres are described in the case where at the initial point the current is weak.
AU - Bonnard, Bernard
AU - Cots, Olivier
AU - Wembe Moafo, Boris Edgar
ID - 33866
JF - ESAIM: Control, Optimisation and Calculus of Variations
KW - Computational Mathematics
KW - Control and Optimization
KW - Control and Systems Engineering
SN - 1292-8119
TI - A Zermelo navigation problem with a vortex singularity
VL - 27
ER -
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 -