TY - JOUR
AU - Uppenkamp, Vera
AU - Höger, Christian
ID - 41427
IS - 2
JF - Theo-Web. Zeitschrift für Religionspädagogik
TI - "Wenn sich die Mitte auflöst...", ist das kein Verlust für die Religionspädagogik - ein bilanzierender Tagungsrückblick mit Augenzwinkern
VL - 20
ER -
TY - GEN
AU - Uppenkamp, Vera
ID - 41425
T2 - Das wissenschaftlich-religionspädagogische Lexikon im Internet www.wirelex.de
TI - Art. Mädchen/Frauen
ER -
TY - CHAP
AU - Pinsch, Jan Christian
ED - Keuchen, Marion
ED - Janus, Richard
ID - 41464
T2 - Musik als Lebensmittel. Kulturwissenschaftlich-theologische Rationen für ein Jahr
TI - "Gib mir was zu trinken, ich habe Durst..." Laientheologie nach Harald Schroeter-Wittke bei den Toten Hosen
VL - 8
ER -
TY - GEN
AU - Pinsch, Jan Christian
AU - Lerke, Stephanie
ID - 41469
T2 - Paderborner Historische Mitteilungen
TI - Rezension zu Oliver Arnold, „Entjudung“ von Theologie und Kirche. Das Eisenacher „Institut zur Erforschung und Beseitigung des jüdischen Einflusses“ auf das deutsche kirchliche Leben 1939-1945, Bd. 6 Christentum und Zeitgeschichte, Leipzig 2020
VL - 34
ER -
TY - JOUR
AU - Pinsch, Jan Christian
ID - 41466
JF - Paderborner Historische Mitteilungen
TI - Viel Lärm um die Stille. Die Geschichte des Raums der Stille an der Universität Paderborn im Spannungsfeld zwischen Religionsfreiheit und weltanschaulicher Neutralität
VL - 34
ER -
TY - CHAP
AU - Jacke, Christoph
ED - Wieser, Matthias
ED - Pilipets, Elena
ID - 41480
T2 - Medienkultur als kritische Gesellschaftsanalyse. Festschrift für Rainer Winter.
TI - 'Keine Gefangenen' oder 'Hyper Hyper' - Kommunikationen, Medien und Kulturen als Motoren gesellschaftlicher Transformationen.
ER -
TY - CHAP
AU - Jacke, Christoph
ED - Jogschies, Rainer
ID - 41483
T2 - Gehört „deutsche“ Popmusik ins Museum? Materialien zu und von der Fünften Pop-Dekadentagung
TI - ‚Deutsche’ Pop-Rezeption – zwischen journalistischen Trivialitäten und nationalen Eigenarten?
ER -
TY - CHAP
AU - Kammeyer, Katharina
ED - Lindner, Konstantin
ED - Zimmermann, Mirjam
ID - 41538
SN - 978-3-8252-5604-3
T2 - Handbuch ethische Bildung. Religionspädagogische Fokussierungen
TI - Ethische Bildung und inklusionsorientierter Religionsunterricht
ER -
TY - CHAP
AU - Kammeyer, Katharina
AU - Neumann, Anna
AU - Uppenkamp, Vera
ED - Keuchen, Marion
ED - Janus, Richard
ID - 41536
T2 - Musik als Lebensmittel. Kulturwissenschaftlich-theologische Rationen für ein Jahr
TI - This is my Fight Song
ER -
TY - JOUR
AU - Gil López, Jano
AU - Santandrea, Matteo
AU - Roland, Ganaël
AU - Brecht, Benjamin
AU - Eigner, Christof
AU - Ricken, Raimund
AU - Quiring, Viktor
AU - Silberhorn, Christine
ID - 22770
JF - New Journal of Physics
SN - 1367-2630
TI - Improved non-linear devices for quantum applications
ER -
TY - JOUR
AU - Gil López, Jano
AU - Teo, Yong Siah
AU - De, Syamsundar
AU - Brecht, Benjamin
AU - Jeong, Hyunseok
AU - Silberhorn, Christine
AU - Sánchez-Soto, Luis L.
ID - 26410
JF - Optica
SN - 2334-2536
TI - Universal compressive tomography in the time-frequency domain
ER -
TY - BOOK
AU - Tumat, Antje
ID - 36808
TI - Musik und Sprache in Schauspielmusiken des 19. Jahrhunderts
ER -
TY - JOUR
AB - Abstract
Background
Subjective Memory Complaints (SMC) in elderly people due to preclinical Alzheimer’s Disease may be associated with dysregulation of the Kynurenine Pathway (KP), with an increase in neurotoxic metabolites that affect cognition. Golf is a challenging sport with high demands on motor, sensory, and cognitive abilities, which might bear the potential to attenuate the pathological changes of preclinical AD. This trial investigated the feasibility of learning to play golf for elderly with cognitive problems and its effects on cognitive functions and the KP.
Methods
In a 22-week single-blinded randomized controlled trial, elderly people with SMC were allocated to the golf (n = 25, 180 min training/week) or control group (n = 21). Primary outcomes were feasibility (golf exam, adherence, adverse events) and general cognitive function (Alzheimer’s Disease Assessment Scale). Secondary outcomes include specific cognitive functions (Response Inhibition, Corsi Block Tapping Test, Trail Making Test), KP metabolites and physical performance (6-Minute-Walk-Test). Baseline-adjusted Analysis-of-Covariance was conducted for each outcome.
Results
42 participants were analyzed. All participants that underwent the golf exam after the intervention passed it (20/23). Attendance rate of the golf intervention was 75 %. No adverse events or drop-outs related to the intervention occurred. A significant time*group interaction (p = 0.012, F = 7.050, Cohen’s d = 0.89) was found for correct responses on the Response Inhibition task, but not for ADAS-Cog. Moreover, a significant time*group interaction for Quinolinic acid to Tryptophan ratios (p = 0.022, F = 5.769, Cohen’s d = 0.84) in favor of the golf group was observed. An uncorrected negative correlation between attendance rate and delta Quinolinic acid to Kynurenic acid ratios in the golf group (p = 0.039, r=-0.443) was found as well.
Conclusions
The findings indicate that learning golf is feasible and safe for elderly people with cognitive problems. Preliminary results suggest positive effects on attention and the KP. To explore the whole potential of golfing and its effect on cognitive decline, a larger cohort should be studied over a longer period with higher cardiovascular demands.
Trial registration
The trial was retrospectively registered (2nd July 2018) at the German Clinical Trials Register (DRKS00014921).
AU - Stroehlein, Julia K.
AU - Vieluf, Solveig
AU - Zimmer, Philipp
AU - Schenk, Alexander
AU - Oberste, Max
AU - Gölz, Christian Johannes
AU - van den Bongard, Franziska
AU - Reinsberger, Claus
ID - 30119
IS - 1
JF - BMC Neurology
KW - Clinical Neurology
KW - General Medicine
SN - 1471-2377
TI - Learning to play golf for elderly people with subjective memory complaints: feasibility of a single‐blinded randomized pilot trial
VL - 21
ER -
TY - JOUR
AU - Vieluf, S
AU - Hasija, Tanuj
AU - Schreier, PJ
AU - El Atrache, R
AU - Hammond, S
AU - Mohammadpour Touserkani, F
AU - Sarkis, RA
AU - Loddenkemper, T
AU - Reinsberger, Claus
ID - 31702
JF - Epilepsy Behav
SN - 1525-5050
TI - Generalized tonic-clonic seizures are accompanied by changes of interrelations within the autonomic nervous system.
VL - 124
ER -
TY - JOUR
AB - AbstractCardiorespiratory fitness was found to influence age-related changes of resting state brain network organization. However, the influence on dedifferentiated involvement of wider and more unspecialized brain regions during task completion is barely understood. We analyzed EEG data recorded during rest and different tasks (sensory, motor, cognitive) with dynamic mode decomposition, which accounts for topological characteristics as well as temporal dynamics of brain networks. As a main feature the dominant spatio-temporal EEG pattern was extracted in multiple frequency bands per participant. To deduce a pattern’s stability, we calculated its proportion of total variance among all activation patterns over time for each task. By comparing fit (N = 15) and less fit older adults (N = 16) characterized by their performance on a 6-min walking test, we found signs of a lower task specificity of the obtained network features for the less fit compared to the fit group. This was indicated by fewer significant differences between tasks in the theta and high beta frequency band in the less fit group. Repeated measures ANOVA revealed that a significantly lower proportion of total variance can be explained by the main pattern in high beta frequency range for the less fit compared to the fit group [F(1,29) = 12.572, p = .001, partial η2 = .300]. Our results indicate that the dedifferentiation in task-related brain activation is lower in fit compared to less fit older adults. Thus, our study supports the idea that cardiorespiratory fitness influences task-related brain network organization in different task domains.
AU - Gölz, Christian Johannes
AU - Mora, Karin
AU - Stroehlein, Julia Kristin
AU - Haase, Franziska Katharina
AU - Dellnitz, Michael
AU - Reinsberger, Claus
AU - Vieluf, Solveig
ID - 30115
IS - 5
JF - Cognitive Neurodynamics
KW - Cognitive Neuroscience
SN - 1871-4080
TI - Electrophysiological signatures of dedifferentiation differ between fit and less fit older adults
VL - 15
ER -
TY - JOUR
AU - Gölz, Christian Johannes
AU - Mora, K.
AU - Rudisch, J.
AU - Gaidai, Roman
AU - Reuter, E.
AU - Godde, B.
AU - Reinsberger, Claus
AU - Voelcker-Rehage, C.
AU - Vieluf, S.
ID - 30114
JF - Neural Networks
KW - Artificial Intelligence
KW - Cognitive Neuroscience
SN - 0893-6080
TI - Classification of visuomotor tasks based on electroencephalographic data depends on age-related differences in brain activity patterns
VL - 142
ER -
TY - JOUR
AB - Thermostable compartmentalized sodium-water sites through intercalated γ-aminopropyl-dimethyl-ethoxy silane in synthetic hectorite.
AU - Keil, Waldemar
AU - Zhao, Kai
AU - Oswald, Arthur
AU - Bremser, Wolfgang
AU - Schmidt, Claudia
AU - Hintze-Bruening, Horst
ID - 35326
IS - 1
JF - Physical Chemistry Chemical Physics
KW - Physical and Theoretical Chemistry
KW - General Physics and Astronomy
SN - 1463-9076
TI - Thermostable water reservoirs in the interlayer space of a sodium hectorite clay through the intercalation of γ-aminopropyl(dimethyl)ethoxysilane in toluene
VL - 24
ER -
TY - JOUR
AB - Pseudo isocyanine chloride monomers equilibrate with H-oligomers and, separated by a threshold, with H-oligomers and fiber-like J-aggregates. The mechanism and thermodynamics of J-aggregate formation is interpreted with the concept of chain growth.
AU - Hämisch, Benjamin
AU - Huber, Klaus
ID - 41817
IS - 35
JF - Soft Matter
KW - Condensed Matter Physics
KW - General Chemistry
SN - 1744-683X
TI - Mechanism and equilibrium thermodynamics of H- and J-aggregate formation from pseudo isocyanine chloride in water
VL - 17
ER -
TY - JOUR
AU - Hense, Dominik
AU - Büngeler, Anne
AU - Kollmann, Fabian
AU - Hanke, Marcel
AU - Orive, Alejandro
AU - Keller, Adrian
AU - Grundmeier, Guido
AU - Huber, Klaus
AU - Strube, Oliver I.
ID - 41818
IS - 10
JF - Biomacromolecules
KW - Materials Chemistry
KW - Polymers and Plastics
KW - Biomaterials
KW - Bioengineering
SN - 1525-7797
TI - Self-Assembled Fibrinogen Hydro- and Aerogels with Fibrin-like 3D Structures
VL - 22
ER -
TY - JOUR
AU - Wagner, Maximilian
AU - Krieger, Anja
AU - Minameyer, Martin
AU - Hämisch, Benjamin
AU - Huber, Klaus
AU - Drewello, Thomas
AU - Gröhn, Franziska
ID - 41816
IS - 6
JF - Macromolecules
KW - Materials Chemistry
KW - Inorganic Chemistry
KW - Polymers and Plastics
KW - Organic Chemistry
SN - 0024-9297
TI - Multiresponsive Polymer Nanoparticles Based on Disulfide Bonds
VL - 54
ER -
TY - JOUR
AU - Hämisch, Benjamin
AU - Pollak, Roland
AU - Ebbinghaus, Simon
AU - Huber, Klaus
ID - 41815
IS - 3
JF - ChemSystemsChem
KW - General Earth and Planetary Sciences
KW - General Environmental Science
SN - 2570-4206
TI - Thermodynamic Analysis of the Self‐Assembly of Pseudo Isocyanine Chloride in the Presence of Crowding Agents
VL - 3
ER -
TY - JOUR
AU - Goelz, C.
AU - Mora, K.
AU - Rudisch, J.
AU - Gaidai, R.
AU - Reuter, E.
AU - Godde, B.
AU - Reinsberger, Claus
AU - Voelcker-Rehage, C.
AU - Vieluf, S.
ID - 31400
JF - Neural Networks
KW - Artificial Intelligence
KW - Cognitive Neuroscience
SN - 0893-6080
TI - Classification of visuomotor tasks based on electroencephalographic data depends on age-related differences in brain activity patterns
VL - 142
ER -
TY - JOUR
AU - Vieluf, S
AU - Amengual-Gual, M
AU - Zhang, B
AU - El Atrache, R
AU - Ufongene, C
AU - Jackson, MC
AU - Branch, S
AU - Reinsberger, Claus
AU - Loddenkemper, T
ID - 31698
IS - 4
JF - Epilepsia
SN - 0013-9580
TI - Twenty-four-hour patterns in electrodermal activity recordings of patients with and without epileptic seizures.
VL - 62
ER -
TY - JOUR
AU - Halle, M
AU - Bloch, W
AU - Niess, AM
AU - Predel, HG
AU - Reinsberger, Claus
AU - Scharhag, J
AU - Steinacker, J
AU - Wolfarth, B
AU - Scherr, J
AU - Niebauer, J
ID - 31695
IS - 3
JF - Transl Sports Med
SN - 2573-8488
TI - Exercise and sports after COVID-19-Guidance from a clinical perspective.
VL - 4
ER -
TY - JOUR
AU - Bonke, EM
AU - Southard, J
AU - Buckley, TA
AU - Reinsberger, Claus
AU - Koerte, IK
AU - Howell, DR
ID - 31699
IS - 3
JF - J Sci Med Sport
SN - 1440-2440
TI - The effects of repetitive head impacts on postural control: A systematic review.
VL - 24
ER -
TY - JOUR
AU - Krutsch, V
AU - Krutsch, W
AU - Härtl, J
AU - Bloch, H
AU - Alt, V
AU - Klein, C
AU - Reinsberger, Claus
AU - Seiffert, R
AU - Huber, L
AU - Weber, J
ID - 31704
IS - 8
JF - PLoS One
SN - 1932-6203
TI - Head injuries in professional football (soccer): Results of video analysis verified by an accident insurance registry.
VL - 16
ER -
TY - JOUR
AU - Brumann, C
AU - Kukuk, M
AU - Reinsberger, Claus
ID - 31706
IS - 13
JF - Sensors (Basel)
SN - 1424-8220
TI - Evaluation of Open-Source and Pre-Trained Deep Convolutional Neural Networks Suitable for Player Detection and Motion Analysis in Squash.
VL - 21
ER -
TY - JOUR
AU - Harnack, Maria
ID - 41174
JF - Paderborner Historische Mitteilungen
TI - Zunftbankett und Göttermahl – Mahlzeiten im Leben und Werk niederländischer Maler im 16. Jahrhundert. Ansätze zur Interpretation
VL - 34
ER -
TY - BOOK
AU - Duschner, Paul
ID - 39553
TI - Afrikanische Masken und Skulpturen der Sammlung Karl-Josef Scheideler des Lippischen Landesmuseums Detmold
ER -
TY - CHAP
AU - Duschner, Paul
ED - Bischoff, Sebastian
ED - Frey, Barbara
ED - Neuwöhner, Andreas
ID - 40940
T2 - Koloniale Welten in Westfalen
TI - Spuren des Kolonialismus in der Airport Art: Vier Beispiele aus Westfalen
ER -
TY - CONF
AU - Kullmer, Gunter
AU - Weiß, Deborah
AU - Schramm, Britta
ID - 34472
TI - Entwicklung einer Methode zur differenzierten Messung des Wachstums der Rissenden von Innenrissen mit der Elektropotentialmethode
VL - DVM-Bericht 253
ER -
TY - JOUR
AB - Luftreiniger werden derzeit häufig als mögliches Hilfsmittel zur Minimierung des Infektionsrisikos im Rahmen der COVID-19-Pandemie diskutiert. Dabei taucht oft die Frage auf, ob Luftreiniger grundsätzlich in der Lage sind, Viren oder virenbeladene Tröpfchen abzuscheiden. Ziel dieses Artikels ist es, die wesentlichen Grundlagen der Wirkungsweise von Luftreinigern und Filtern zu beschreiben, Methoden zur Messung der Reinigungswirkung im Größenbereich von Viren und virenbeladenen Tröpfchen aufzuzeigen sowie typische Szenarien zum Betrieb von Luftreinigern in einem mathematischen Modell zu erfassen. Darauf basierend können die Möglichkeiten und Grenzen von Luftreinigern für reale Anwendungsfälle besser eingeschätzt werden.
AU - Schumacher, Stefan
AU - Asbach, Christof
AU - Schmid, Hans-Joachim
ID - 26095
JF - Gefahrstoffe
SN - 0949-8036
TI - Effektivität von Luftreinigern zur Reduzierung des COVID-19-Infektionsrisikos/ Efficacy of air purifiers in reducing the risk of COVID-19 infections
ER -
TY - CHAP
AU - Seng, Eva- Maria
AU - Göttmann, Frank
ED - Seng, Eva-Maria
ED - Göttmann, Frank
ID - 41870
T2 - Innovation in der Bauwirtschaft – Innovation in the building industry. Wesersandstein vom 16. bis 19. Jahrhundert – Weser Sandstone form the 16th to the 19th Century
TI - Einleitung – Introduction
ER -
TY - CHAP
AU - Seng, Eva- Maria
ED - Saupe, Achim
ED - Samida, Stefanie
ID - 41869
T2 - Weitergabe und Wiedergabe. Dimensionen des Authentischen im Umgang mit immateriellem Kulturerbe
TI - Authentizität und kulturelles Erbe – Genese, Aufnahme und Diskussion des Authentizitätsaspektes in die Welterbekonvention
ER -
TY - BOOK
ED - Seng, Eva- Maria
ED - Göttmann, Frank
ID - 41871
TI - Innovation in der Bauwirtschaft – Innovation in the building industry. Wesersandstein vom 16. bis 19. Jahrhundert – Weser Sandstone form the 16th to the 19th Century
ER -
TY - CHAP
AU - Seng, Eva- Maria
ED - Hermle, Siegfried
ED - Schneider, Thomas Martin
ID - 41868
T2 - Protestantische Impulse. Prägende Gestalten in Deutschland nach 1945
TI - Otto Bartning, Spektakuläre Kirchenbaulösungen versus Einfachbauten
ER -
TY - BOOK
AU - Seng, Eva- Maria
ID - 41872
TI - Erkundungen in die Kunstgeschichte, Kirchenbau, Städtebau, Utopie, Sammelband von bislang meist unpublizierten Aufsätzen
ER -
TY - THES
AU - Schafran, Tommy
ID - 41908
TI - Ein Beitrag zur Entwicklung einer additiv gefertigten Unterschenkelorthese unter Berücksichtigung biomechanischer Aspekte des Charcot-Fußes
ER -
TY - CONF
AU - Tews, Karina
AU - Aubel, Tobias
AU - Teutenberg, Dominik
AU - Meschut, Gerson
AU - Duffe, Tobias
AU - Kullmer, Gunter
ID - 21803
T2 - DECHEMA, Gesellschaft für Chemische Technik und Biotechnologie e.V. (Ed.), 21. Kolloquium: Gemeinsame Forschung in der Klebtechnik
TI - Methodenentwicklung zur numerischen Lebensdauerprognose von hyperelastischen Klebverbindungen infolge zyklischer Beanspruchung mittels bruchmechanischer Ansätze
ER -
TY - JOUR
AB - The continuous development of medical methods in recent decades has achieved measurable improvement. The interdisciplinary cooperation of engineers and physicians is a forward-looking component of this development. However, this cooperation also results in new interfaces on the communication and software level, which must be defined by implementing a systematic workflow. In this paper, the step-by-step implementation of engineering methods into the surgical workflow is shown. The focus is on the basic requirements and the necessary exchange of information. Additively manufactured models for preoperative elucidation of the patient are used as a psychological added value to increase the transparency of the surgical procedure. In addition, the models serve to train young surgeons and provide the opportunity to plan advanced surgical techniques.
AU - Risse, Lena
AU - Kullmer, Gunter
ID - 41909
IS - 2
JF - Journal of 3D Printing in Medicine
KW - General Medicine
SN - 2059-4755
TI - Application of engineering methods in the planning process of surgical treatments
VL - 5
ER -
TY - CONF
AU - Duffe, Tobias
AU - Schramm, Britta
AU - Kullmer, Gunter
ID - 41910
TI - Experimentelle Ermittlung von Rissfortschrittskurven für hyperelastische Klebstoffe
VL - DVM-Bericht 253
ER -
TY - CONF
AU - Duffe, Tobias
AU - Kullmer, Gunter
AU - Tews, Karina
AU - Aubel, Tobias
AU - Meschut, Gerson
ID - 29499
T2 - 51. DVM-Tagung, Arbeitskreis Bruchmechanik und Bauteilsicherung
TI - Bruchmechanische Lebensdauervorhersage für hyperelastische Klebverbindungen
ER -
TY - CONF
AU - Hilleringmann, Ulrich
AU - Petrov, Dmitry
AU - Mwammenywa, Ibrahim
AU - Kagarura, Geoffrey M.
ID - 24538
KW - Art-D
KW - Afrika
TI - Local Power Control using Wireless Sensor System for Microgrids in Africa
ER -
TY - CONF
AB - LLC resonant converters are typically unsuitable to be applied for wide voltage-transfer ratio applications. With a full-bridge inverter, however, they can be operated in a variety of different modulations. Most notably, by permanently turning on one MOSFET and turning off the other MOSFET of the same bridge leg, the LLC can be operated in half-bridge configuration reducing the gain by a factor of two. The resonant capacitor is hereby charged to an average voltage of half the input voltage. In this modulation, however, the switch that is permanently turned on is stressed by the complete resonant current while exhibiting no switching losses. This paper proves that the frequency-doubler modulation can better balance the losses among all MOSFETs and should be the preferred mode of operation favored over the conventional half-bridge modulation. This paper analyzes the beneficial loss distribution, proposes an on-the-fly morphing modulation and discusses potential operating strategies to further reduce the junction temperature. Furthermore, it is shown that this modulation can also be altered to achieve the asymmetrical LLC operation. Experimental measurement results show that the modulation results in a substantial decrease of the maximum MOSFET temperature and shows that the converter can be smoothly transitioned during operation from full-bridge modulation to the frequency-doubler half-bridge operation and back.
AU - Rehlaender, Philipp
AU - Unruh, Roland
AU - Hankeln, Lars
AU - Schafmeister, Frank
AU - Böcker, Joachim
ID - 29899
KW - Resonant converter
KW - High frequency power converter
KW - Switched-mode power supply
KW - Converter control
KW - Control methods for electrical systems
SN - 978-9-0758-1537-5
T2 - 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)
TI - Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration
ER -
TY - THES
AU - Stolbchenko, Mykhailo
ID - 42013
SN - 978-3-8440-7971-5
TI - Zwei-Rollen-Gießwalzen und thermomechanische Behandlung von dünnen Bändern aus der Aluminiumlegierung EN AW-6082
ER -
TY - GEN
AB - The interaction between quantum light and matter is being intensively studied
for systems that are enclosed in high-$Q$ cavities which strongly enhance the
light-matter coupling. However, for many applications, cavities with lower
$Q$-factors are preferred due to the increased spectral width of the cavity
mode. Here, we investigate the interaction between quantum light and matter
represented by a $\Lambda$-type three-level system in lossy cavities, assuming
that cavity losses are the dominant loss mechanism. We demonstrate that cavity
losses lead to non-trivial steady states of the electronic occupations that can
be controlled by the loss rate and the initial statistics of the quantum
fields. The mechanism of formation of such steady states can be understood on
the basis of the equations of motion. Analytical expressions for steady states
and their numerical simulations are presented and discussed.
AU - Rose, H.
AU - Tikhonova, O. V.
AU - Meier, T.
AU - Sharapova, P.
ID - 32236
T2 - arXiv:2109.00842
TI - Steady states of $Λ$-type three-level systems excited by quantum light in lossy cavities
ER -
TY - JOUR
AB - Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interferometers have been successfully realized in bulk and fiber-based configurations. However, rapidly developing integrated technologies provide higher efficiencies, smaller footprints, and pave the way to quantum-enhanced on-chip interferometry. In this work, we theoretically realised an integrated architecture of the multimode SU(1,1) interferometer which can be applied to various integrated platforms. The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. Based on the potassium titanyl phosphate (KTP) platform, we show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit. In addition, we discuss the fundamental difference between single-mode and highly multimode SU(1,1) interferometers in the properties of phase sensitivity and its limits. Finally, we explore how to improve the phase sensitivity by filtering the output radiation and using different seeding states in different modes with various detection strategies.
AU - Ferreri, Alessandro
AU - Santandrea, Matteo
AU - Stefszky, Michael
AU - Luo, Kai Hong
AU - Herrmann, Harald
AU - Silberhorn, Christine
AU - Sharapova, Polina R.
ID - 26077
JF - Quantum
SN - 2521-327X
TI - Spectrally multimode integrated SU(1,1) interferometer
ER -
TY - JOUR
AU - Sukharnikov, Vladislav
AU - Sharapova, Polina
AU - Tikhonova, Olga
ID - 40379
JF - Optics & Laser Technology
KW - Electrical and Electronic Engineering
KW - Atomic and Molecular Physics
KW - and Optics
KW - Electronic
KW - Optical and Magnetic Materials
SN - 0030-3992
TI - Managing spectral properties and Schmidt mode content of squeezed vacuum light using sum-frequency converter
VL - 136
ER -
TY - JOUR
AU - Lang, Susanne
AU - Topalović, Elvira
ID - 41940
JF - In: Praxis Deutschunterricht
TI - Komplexe Wörter richtig schreiben. Wortanalyse als Rechtschreibstrategie.
VL - 4
ER -
TY - JOUR
AU - Noack, Christina
AU - Topalović, Elvira
ID - 41939
JF - In: Praxis Deutschunterricht
TI - Rechtschreibstrategien und Sprachstrukturen.
VL - 4
ER -
TY - CONF
AU - Gyger, S
AU - Zichi, J
AU - Schweickert, L
AU - Elshaari, A.W
AU - Steinhauer, S
AU - Covre da Silva, S.F
AU - Rastelli, A
AU - Zwiller, V
AU - Jöns, Klaus D.
AU - Errando-Herranz, C
ID - 41890
TI - Reconfigurable quantum photonics with on-chip detectors
VL - 12
ER -
TY - CONF
AU - Klein, J
AU - Sigl, L
AU - Gyger, S
AU - Barthelmi, K
AU - Florian, M
AU - Rey, S
AU - Taniguchi, T
AU - Watanabe, K
AU - Jahnke, F
AU - Kastl, C
AU - Zwiller, V
AU - Jöns, Klaus D.
AU - Müller, K
AU - Wurstbauer, U
AU - Finley, J.F
AU - Holleitner, A.W
ID - 41891
IS - 1
TI - Engineering the Luminescence and Generation of Individual Defect Emitters in Atomically Thin MoS2
VL - 8
ER -
TY - CONF
AU - Basso Basset, F
AU - Salusti, F
AU - Schweickert, L
AU - Rota, M.B
AU - Tedeschi, D
AU - Covre da Silva, S.F
AU - Roccia, E
AU - Zwiller, V
AU - Jöns, Klaus D.
AU - Rastelli, A
AU - Trotta, R
ID - 41892
IS - 7
TI - Quantum Teleportation with Imperfect Quantum Dots
VL - 7
ER -
TY - CONF
AU - Schimpf, C
AU - Reindl, M
AU - Basset, F.B
AU - Jöns, Klaus D.
AU - Trotta, R
AU - Rastelli, A
ID - 41888
IS - 10
TI - Quantum dots as potential sources of strongly entangled photons: Perspectives and challenges for applications in quantum networks
VL - 118
ER -
TY - CONF
AU - Hötger, A
AU - Klein, J
AU - Barthelmi, K
AU - Sigl, L
AU - Sigger, F
AU - Männer, W
AU - Gyger, S
AU - Florian, M
AU - Lorke, M
AU - Jahnke, F
AU - Taniguchi, T
AU - Watanabe, K
AU - Jöns, Klaus D.
AU - Wurstbauer, U
AU - Kastl, C
AU - Müller, K
AU - J. J. Finley, J.J
AU - A. W. Holleitner, A.W
ID - 41893
IS - 2
TI - Gate-Switchable Arrays of Quantum Light Emitters in Contacted Monolayer MoS2 van der Waals Heterodevices
VL - 21
ER -
TY - CONF
AU - Neuwirth, J
AU - Basso Basset, F
AU - Rota, M. B
AU - Roccia, E
AU - Schimpf, C
AU - Jöns, Klaus D.
AU - Rastelli, A
AU - Trotta, R
ID - 41882
IS - 4
TI - Quantum dot technology for quantum repeaters: from entangled photon generation toward the integration with quantum memories
VL - 1
ER -
TY - CONF
AU - Lettner, T
AU - Gyger, S
AU - Zeuner, K.D
AU - Schweickert, L
AU - Steinhauer, S
AU - Hedlund, C. Reuterskiöld
AU - Stroj, S
AU - Rastelli, A
AU - Hammar, M
AU - Trotta, R
AU - Jöns, Klaus D
AU - Zwiller, V
ID - 41883
IS - 24
TI - Strain-Controlled Quantum Dot Fine Structure for Entangled Photon Generation at 1550 nm
VL - 21
ER -
TY - CONF
AU - Wang, Y
AU - Jöns, Klaus D.
AU - Sun, Z
ID - 41887
IS - 1
TI - Integrated photon-pair sources with nonlinear optics
VL - 8
ER -
TY - CONF
AU - Tuktamyshev, A
AU - Fedorov, A
AU - Bietti, S
AU - Vichi, S
AU - Zeuner, K.D
AU - Jöns, Klaus D.
AU - Chrastina, D
AU - Tsukamoto, S
AU - Zwiller, V
AU - Gurioli, M
AU - Sanguinetti, S
ID - 41886
IS - 13
TI - Telecom-wavelength InAs QDs with low fine structure splitting grown by droplet epitaxy on GaAs (111) A vicinal substrates
VL - 118
ER -
TY - CONF
AU - Errando-Herranz, C
AU - Schöll, E
AU - Picard, R
AU - Laini, M
AU - Gyger, S
AU - Elshaari, A.W
AU - Branny, A
AU - Wennberg, U
AU - Barbat, S
AU - Renaud, T
AU - Brotons-Gisbert, M
AU - Bonato, C
AU - Gerardot, B.D
AU - Zwiller, V
AU - Jöns, Klaus D.
ID - 41885
IS - 4
TI - Resonance fluorescence from waveguide–coupled, strain–localized two–dimensional quantum emitters
VL - 8
ER -
TY - CONF
AU - Jöns, Klaus D.
AU - Zeuner, K.D
AU - Schweickert, L
AU - Hedlund, C.R
AU - Lobato, C.N
AU - Lettner, T
AU - Wang, K
AU - Gyger, S
AU - Schöll, E
AU - Steinhauer, S
AU - Hammar, M
AU - Zwiller, V
ID - 41884
TI - On-Demand Generation of Entangled Photon Pairs in the Telecom C-Band with InAs Quantum Dots
VL - 88
ER -
TY - CONF
AU - Weiß, Deborah
AU - Schramm, Britta
AU - Neuser, Moritz
AU - Grydin, Olexandr
AU - Kullmer, Gunter
ID - 24006
TI - Experimentelle bruchmechanische Untersuchung eines clinchgeeigneten Bleches aus HCT590X mithilfe einer neuen Probengeometrie
VL - DVM-Bericht 253
ER -
TY - THES
AU - Sonnenrein, Gerrit
ID - 42141
TI - Effizienzsteigerung von Haushaltskühlgeräten durch polymergebundene Phasenwechselmaterialien
ER -
TY - THES
AU - Olma, Simon
ID - 42070
SN - 9783947647231
TI - Systemtheorie von Hardware-in-the-Loop-Simulationen mit Anwendung auf einem Fahrzeugachsprüfstand mit parallelkinematischem Lastsimulator
VL - 404
ER -
TY - THES
AU - Lankeit, Christopher
ID - 42069
TI - Systematik zur Evolution technischer Anforderungen
ER -
TY - BOOK
ED - Caruso, Carina
ED - Hengesbach, Rudolf
ID - 36651
TI - Angehende (Religions-)Lehrkräfte begleiten aber wie?
ER -
TY - BOOK
AU - Eckel, Julia
ID - 42250
SN - 978-3-8394-5320-9
TI - Das Audioviduum. Eine Theoriegeschichte des Menschenmotivs in audiovisuellen Medien
ER -
TY - BOOK
AU - Elshahawy, Ahmed
ID - 42305
TI - Islamischer Religionsunterricht. Beitrag zu einem friedlichen Zusammenleben
ER -
TY - JOUR
AU - Abdelrahem, Mohammed
AU - Abdallah, Ali
AU - Pasqualone, Antonella
ID - 42279
JF - Journal of Ethnic Foods
TI - The multiplicity of halal standards: a case study of application to slaughterhouses
ER -
TY - THES
AU - Kohlstedt, Andreas
ID - 28370
SN - 978-3-947647-15-6
TI - Modellbasierte Synthese einer hybriden Kraft-/Positionsregelung für einen Fahrzeugachsprüfstand mit hydraulischem Hexapod
VL - 396
ER -
TY - GEN
AU - Foerster, Anne
ID - 40933
T2 - H-Soz-Kult
TI - W. M. Ormrod: Women and Parliament in Later Medieval England (The New Middle Ages)
ER -
TY - THES
AU - Keck, Stefan
ID - 42529
SN - 0178-9457
TI - Rissverhalten von unidirektionalen Flachsfaser-Epoxidharz-Verbunden infolge statischer Belastung
VL - 354
ER -
TY - JOUR
AU - Schreiber, Christine
AU - Scharlau, Ingrid
AU - Patrzek, Justine
ID - 31666
JF - Psychologieunterricht
KW - Unterrichtsfach Psychologie
TI - „Power Poses“ – Fakten, frisierte Daten, Forschungslyrik? Ein Unterrichtsvorhaben zu Praktiken und Darstellungsformen psychologischer Forschung am Beispiel von nonverbaler Kommunikation
ER -
TY - JOUR
AU - Patrzek, Justine
AU - Buhl, Heike M.
AU - Scharlau, Ingrid
ID - 31672
JF - Psychologieunterricht
KW - Unterrichtsfach Psychologie
TI - Unterrichtsfach Psychologie an der Universität Paderborn
ER -
TY - CONF
AB - Over the last years, several approaches for the data-driven estimation of expected possession value (EPV) in basketball and association football (soccer) have been proposed. In this paper, we develop and evaluate PIVOT: the first such framework for team handball. Accounting for the fast-paced, dynamic nature and relative data scarcity of hand- ball, we propose a parsimonious end-to-end deep learning architecture that relies solely on tracking data. This efficient approach is capable of predicting the probability that a team will score within the near future given the fine-grained spatio-temporal distribution of all players and the ball over the last seconds of the game. Our experiments indicate that PIVOT is able to produce accurate and calibrated probability estimates, even when trained on a relatively small dataset. We also showcase two interactive applications of PIVOT for valuing actual and counterfactual player decisions and actions in real-time.
AU - Müller, Oliver
AU - Caron, Matthew
AU - Döring, Michael
AU - Heuwinkel, Tim
AU - Baumeister, Jochen
ID - 24547
KW - expected possession value
KW - handball
KW - tracking data
KW - time series classification
KW - deep learning
T2 - 8th Workshop on Machine Learning and Data Mining for Sports Analytics (ECML PKDD 2021)
TI - PIVOT: A Parsimonious End-to-End Learning Framework for Valuing Player Actions in Handball using Tracking Data
ER -
TY - CONF
AB - In early 2021, the finance world was taken by storm by the dramatic price surge of the GameStop Corp. stock. This rise is being, at least in part, attributed to a group of Redditors belonging to the now-famous r/wallstreetbets (WSB) subreddit group. In this work, we set out to address if user activity on the WSB subreddit is associated with the trading volume of the GME stock. Leveraging a unique dataset containing more than 4.9 million WSB posts and comments, we assert that user activity is associated with the trading volume of the GameStop stock. We further show that posts have a significantly higher predictive power than comments and are especially helpful for predicting unusually high trading volume. Lastly, as recent events have shown, we believe that these findings have implications for retail and institutional investors, trading platforms, and policymakers, as these can have disruptive potential.
AU - Caron, Matthew
AU - Gulenko, Maryna
AU - Müller, Oliver
ID - 25029
KW - Retail investors
KW - GameStop
KW - Social Networks
KW - Reddit
KW - WallStreetBets
T2 - 42nd International Conference on Information Systems (ICIS 2021)
TI - To the Moon! Analyzing the Community of “Degenerates” Engaged in the Surge of the GME Stock
ER -
TY - JOUR
AB - A central tenet of theoretical cryptography is the study of the minimal assumptions required to implement a given cryptographic primitive. One such primitive is the one-time memory (OTM), introduced by Goldwasser, Kalai, and Rothblum [CRYPTO 2008], which is a classical functionality modeled after a non-interactive 1-out-of-2 oblivious transfer, and which is complete for one-time classical and quantum programs. It is known that secure OTMs do not exist in the standard model in both the classical and quantum settings. Here, we propose a scheme for using quantum information, together with the assumption of stateless (i.e., reusable) hardware tokens, to build statistically secure OTMs. Via the semidefinite programming-based quantum games framework of Gutoski and Watrous [STOC 2007], we prove security for a malicious receiver making at most 0.114n adaptive queries to the token (for n the key size), in the quantum universal composability framework, but leave open the question of security against a polynomial amount of queries. Compared to alternative schemes derived from the literature on quantum money, our scheme is technologically simple since it is of the "prepare-and-measure" type. We also give two impossibility results showing certain assumptions in our scheme cannot be relaxed.
AU - Broadbent, Anne
AU - Gharibian, Sevag
AU - Zhou, Hong-Sheng
ID - 29780
JF - Quantum
KW - Physics and Astronomy (miscellaneous)
KW - Atomic and Molecular Physics
KW - and Optics
SN - 2521-327X
TI - Towards Quantum One-Time Memories from Stateless Hardware
VL - 5
ER -
TY - CHAP
AU - Fuchs, Christian
ED - Fuchs, Christian
ED - Unterberger, Klaus
ID - 38153
T2 - The Public Service Media and Public Service Internet Manifesto
TI - The Public Service Media and Public Service Internet Utopias Survey Report
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 37192
TI - Communicating COVID-19. Everyday Life, Digital Capitalism, and Conspiracy Theories in Pandemic Times. SocietyNow Series
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 38143
IS - 15
JF - Information, Communication and Society
TI - History and Class Consciousness 2.0: Georg Lukács in the Age of Digital Capitalism and Big Data
VL - 24
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 37194
TI - Marxist Humanism and Communication Theory. Media, Communication and Society Volume One
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 38146
IS - 1
JF - tripleC: Communication, Capitalism & Critique
TI - Engels@200: Friedrich Engels and Digital Capitalism. How Relevant Are Engels’s Works 200 Years After His Birth?
VL - 19
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 38145
IS - 1
JF - tripleC: Communication, Capitalism & Critique
TI - Engels@200: Friedrich Engels in the Age of Digital Capitalism. Introduction
VL - 19
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 38147
IS - 7-8
JF - Critical Sociology
TI - Cornel West and Marxist Humanism
VL - 47
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 38181
TI - Das digitale Kapital. Zur Kritik der politischen Ökonomie des 21. Jahrhunderts
ER -
TY - BOOK
ED - Fuchs, Christian
ED - Unterberger, Klaus
ID - 38133
TI - The Public Service Media and Public Service Internet Manifesto
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 37195
TI - Social Media: A Critical Introduction. Third English edition
ER -
TY - CHAP
AU - Alessandro, D'Arma
AU - Fuchs, Christian
AU - Horowitz, Minna
AU - Unterberger, Klaus
ED - Fuchs, Christian
ED - Unterberger, Klaus
ID - 38152
T2 - The Public Service Media and Public Service Internet Manifesto
TI - The Future of Public Service Media and the Internet
ER -
TY - CHAP
AU - Fuchs, Christian
AU - Unterberger, Klaus
ED - Fuchs, Christian
ED - Unterberger, Klaus
ID - 38154
T2 - The Public Service Media and Public Service Internet Manifesto
TI - Introduction
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 38148
IS - 1
JF - Westminster Papers in Communication and Culture
TI - The Digital Commons and the Digital Public Sphere: How to Advance Digital Democracy Today
VL - 16
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 38157
IS - 1
JF - tripleC: Communication, Capitalism & Critique
TI - How Did Donald Trump Incite a Coup Attempt?
VL - 19
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 38149
IS - 4
JF - Journal of Media Ethics
TI - Foundations of Communication/Media/Digital (In)Justice
VL - 36
ER -
TY - GEN
AU - Fuchs, Christian
ID - 38156
T2 - The Conversation
TI - Channel 4: Rather Than Privatising Public Service Media We Should Be Expanding It Online
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 40143
TI - 数字劳动与卡尔·马克思
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 40135
TI - Enformasyon Çağında Marx Okumak. Kapital Cilt 1 Üzerine Bir Medya ve İletişim Çalışması
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 40122
TI - Soziale Medien und kritische Theorie. Second German edition
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 40123
TI - Membaca Kembali Marx Di Era Kapitalisme Digital
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 40124
TI - Dijital Kapitalizm Çağında Marx’ı Yeniden Okumak. BeneDijital Kapitalizm Çağında Marx’ı Yeniden Okumak
ER -
TY - JOUR
AB - In this paper we obtain a complete list of imaginary n-quadratic fields with class groups of exponent 3 and 5 under ERH for every positive integer n where an n-quadratic field is a number field of degree 2ⁿ represented as the composite of n quadratic fields.
AU - Klüners, Jürgen
AU - Komatsu, Toru
ID - 34840
IS - 329
JF - Mathematics of Computation
KW - Applied Mathematics
KW - Computational Mathematics
KW - Algebra and Number Theory
SN - 0025-5718
TI - Imaginary multiquadratic number fields with class group of exponent $3$ and $5$
VL - 90
ER -
TY - THES
AU - Laubrock, Miriam
ID - 42759
SN - 978-3-8440-7823-7
TI - Auslegung lastübertragender Klebverbindungen für den Landmaschinenbau
ER -
TY - THES
AU - Giese, Patrick
ID - 42760
SN - 978-3-8440-8113-8
TI - Methode zur Prognose des Tragverhaltens von Halbhohlstanznietverbindungen
ER -
TY - THES
AU - Janzen, Vitalij
ID - 42761
SN - 978-3-8440-8346-0
TI - Weiterentwicklung des einstufigen Widerstandselementschweißens
ER -
TY - THES
AU - Sartisson, Vadim
ID - 42764
SN - 978-3-8440-8228-9
TI - Entwicklung eines selbstschließenden Vollstanznietverfahrens für das Fügen ultrahochfester Stahlwerkstoffe mit Aluminiumlegierungen
ER -
TY - THES
AU - Zweck, Jonas
ID - 42765
SN - 978-3-8440-8304-0
TI - Robotergeführtes Fließlochformschrauben hochfester Stahlwerkstoffe mit Aluminium-Strangpressprofilen
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 41607
JF - 国外社会科学前沿 (International Journal of Social Science) 2021 (4)
TI - 受众商品、数字劳动之争、 马克思主义政治经济学与批判理论 (The Audience Commodity, the Digital Labour Debate, Marxist Political Economy, and Critical Theory).
ER -
TY - THES
AU - Janzen, Alexander
ID - 42811
SN - 978-3-8439-4847-0
TI - Analyse von elektrischen Wärmeübertragungselementen unter Berücksichtigung des Kristallisationsfoulings in der Warmwasseraufbereitung
ER -
TY - BOOK
ED - Fuchs, Christian
ED - Chandler, David
ID - 41434
TI - Dijital Nesneler, Digital Özneler - Büyük Veri Çağında Kapitalizm, Emek ve Siyaset Üzerine Disiplinlerarası Yaklaşımlar
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 41541
JF - 国外理论动态 (Foreign Theoretical Trends) 2021 (3)
TI - 弗洛姆与交往批判理论
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 42483
IS - 2
JF - tripleC: Communication, Capitalism & Critique
TI - Preface: Manfred Knoche’s Critique of the Political Economy of the Media and Communication [Preface to the article “Media Concentration” by Manfred Knoche]
VL - 19
ER -
TY - GEN
AU - Kirchgässner, Wilhelm
AU - Wallscheid, Oliver
AU - Böcker, Joachim
ID - 29655
T2 - arXiv preprint arXiv:2103.16323
TI - Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning
ER -
TY - JOUR
AB - In order to reduce the fuel consumption and consequently the greenhouse emissions, the automotive industry is implementing lightweight constructions in the body in white production. As a result, the use of aluminum alloys is continuously increasing. Due to poor weldability of aluminum in combination with other materials, mechanical joining technologies like clinching are increasingly used. In order to predict relevant characteristics of clinched joints and to ensure the reliability of the process, it is simulated numerically during product development processes. In this regard the predictive accuracy of the simulated process highly depends on the implemented friction model. In particular, the frictional behavior between the sheet metals affects the geometrical formation of the clinched joint significantly. This paper presents a testing method, which enables to determine the frictional coefficients between sheet metal materials for the simulation of clinching processes. For this purpose, the correlation of interface pressure and the relative velocity between aluminum sheets in clinching processes is investigated using numerical simulation. Furthermore, the developed testing method focuses on the specimen geometry as well as the reproduction of the occurring friction conditions between two sheet metal materials in clinching processes. Based on a methodical approach the test setup is explained and the functionality of the method is proven by experimental tests using sheet metal material EN AW6014.
AU - Rossel, Moritz Sebastian
AU - Böhnke, Max
AU - Bielak, Christian Roman
AU - Bobbert, Mathias
AU - Meschut, Gerson
ID - 34227
JF - Key Engineering Materials
KW - Mechanical Engineering
KW - Mechanics of Materials
KW - General Materials Science
SN - 1662-9795
TI - Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes
VL - 883
ER -
TY - JOUR
AU - Sherman, David A.
AU - Lehmann, Tim
AU - Baumeister, Jochen
AU - Grooms, Dustin R.
AU - Norte, Grant E.
ID - 32437
IS - 2
JF - Experimental Brain Research
KW - General Neuroscience
SN - 0014-4819
TI - Somatosensory perturbations influence cortical activity associated with single-limb balance performance
VL - 240
ER -
TY - GEN
AU - Ludwig, Janis
AU - Kykal, Carsten
AU - Schmid, Hans-Joachim
ID - 27551
KW - aerosol spreading
KW - SARS-CoV-2
KW - indoor air filtration
T2 - Book of abstracts for the 2021 European Aerosol Conference
TI - Assessing spreading and removal of virus laden aerosols in different settings using an aerosol method (Presentation)
ER -
TY - GEN
AU - Ludwig, Janis
AU - Schmid, Hans-Joachim
ID - 27553
TI - Synthese und asymmetrische Funktionalisierung von submikronen Janus-Polymer-Partikeln in der Gasphase (Poster)
ER -
TY - CHAP
AU - Matzner, Tobias
ED - Sprenger, Florian
ID - 42904
T2 - Autonome Autos – Die Zukunft des Verkehrs und die Dispositive der Mobilität
TI - Die Fussgänger*innen autonomer Kraftfahrzeuge. Eine informatische Dispositivanalyse
ER -
TY - CONF
AU - Lange, Sven
AU - Hedayat, Christian
AU - Kuhn, Harald
AU - Hilleringmann, Ulrich
ID - 39401
T2 - 2021 Smart Systems Integration (SSI)
TI - Adaptation and Optimization of Planar Coils for a More Accurate and Far-Reaching Magnetic Field-Based Localization in the Near Field
ER -
TY - CONF
AU - Petrov, Dmitry
AU - Kroschewski, Konstantin
AU - Mwammenywa, Ibrahim
AU - Kagarura, G. Mark
AU - Hilleringmann, Ulrich
ID - 39927
T2 - 2021 IEEE Sensors
TI - Low-Cost NB-IoT Microgrid Power Quality Monitoring System
ER -
TY - CONF
AU - Petrov, Dmitry
AU - Kroschewski, Konstantin
AU - Hilleringmann, Ulrich
ID - 39397
T2 - 2021 Smart Systems Integration (SSI)
TI - Microcontroller Firmware Design for Industrial Wireless Sensors
ER -
TY - CONF
AU - Reker, Julia
AU - Meyers, Thorsten
AU - Vidor, Fabio F.
AU - Joubert, Trudi-Heleen
AU - Hilleringmann, Ulrich
ID - 39384
T2 - 2021 IEEE AFRICON
TI - Influence of electrode metallization on thin-film transistor performance
ER -
TY - CONF
AU - Sander, Tom
AU - Lange, Sven
AU - Hilleringmann, Ulrich
AU - Geneis, Volker
AU - Hedayat, Christian
AU - Kuhn, Harald
AU - Gockel, Franz-Barthold
ID - 39392
T2 - 2021 22nd IEEE International Conference on Industrial Technology (ICIT)
TI - Detection of Defects on Irregular Structured Surfaces by Image Processing Methods for Feature Extraction
ER -
TY - CONF
AU - Lange, Sven
AU - Schroder, Dominik
AU - Hedayat, Christian
AU - Kuhn, Harald
AU - Hilleringmann, Ulrich
ID - 39390
T2 - 2021 22nd IEEE International Conference on Industrial Technology (ICIT)
TI - Development of Methods for Coil-Based Localization by Magnetic Fields of Miniaturized Sensor Platforms in Bioprocesses
ER -
TY - CHAP
AU - Hilleringmann, Ulrich
ID - 39394
SN - 9780128189009
T2 - Nanostructured Zinc Oxide
TI - ZnO nanoparticle films as active layer for thin film transistors
ER -
TY - CONF
AU - Reker, Julia
AU - Meyers, Thorsten
AU - Vidor, Fabio F.
AU - Joubert, Trudi-Heleen
AU - Hilleringmann, Ulrich
ID - 39396
T2 - 2021 Smart Systems Integration (SSI)
TI - Complementary Inverter Circuits on Flexible Substrates
ER -
TY - CONF
AU - Reker, Julia
AU - Meyers, Thorsten
AU - Vidor, Fabio F.
AU - Joubert, Trudi-Heleen
AU - Hilleringmann, Ulrich
ID - 39388
T2 - 2021 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)
TI - Integration Process for Self-aligned Sub-µm Thin-Film Transistors for Flexible Electronics
ER -
TY - GEN
ID - 41288
TI - Entwicklung einer konstruktionsbasierten französischen Grammatik: ein Arbeitsbericht zum Adjektiv- und Nominalbandd
ER -
TY - BOOK
AU - Siepmann, Dirk
AU - Bürgel, Christoph
ID - 41221
TI - Grammatik des gesprochenen und geschriebenen Französisch: Das Nomen,
VL - 2
ER -
TY - GEN
ID - 41269
TI - Lexiko-grammatische Konstruktionen als Kern der Spracharbeit im Spanischunterricht, in: Hispanorama
ER -
TY - GEN
ID - 41267
TI - Hörverstehenskompetenz: Spanischstudierende auf dem Prüfstand der Abituraufgaben
ER -
TY - JOUR
AU - Burgfeld-Meise, Bianca
AU - Dehmel, Lukas
ID - 43148
JF - Zeitschrift MedienPädagogik 42
TI - Subjektwissen als Bildungsperspektive junger Erwachsener. Self-Tracking-Apps als digitale Optimierungstechnologien im Spannungsgefüge von Kontrolle und Selbstermächtigung
ER -
TY - JOUR
AU - Damm, Jannis
AU - Albiez, Matthias
AU - Göddecke, Johannes
AU - Meschut, Gerson
AU - Ummenhofer, Thomas
ID - 43159
IS - 9
JF - adhäsion KLEBEN & DICHTEN
KW - Polymers and Plastics
KW - General Chemical Engineering
KW - General Chemistry
SN - 1619-1919
TI - Dämpfungseigenschaften geklebter Verbindungen - Potenzialanalyse und Klebstoffcharakterisierung
VL - 65
ER -
TY - JOUR
AB - Der Beitrag referiert Ergebnisse studentischer Forschungsprojekte, die sich mit den Folgen der Corona-Pandemie für die berufliche Bildung, für Berufswahl, Berufsvorbereitung und Ausbildung befasst haben. Die Ergebnisse zeigen nicht nur, wie unterschiedlich Berufe und Branchen von der Krise betroffen waren und damit umgegangen sind, sondern geben auch Hinweise auf nötige Weiterentwicklungen zur Verbesserung der Resilienz von Branchen, Berufen, Betrieben und ihrer Ausbildung.
AU - Heisler, Dietmar
ID - 43179
JF - Berufsbildung. Zeitschrift für Theorie-Praxis-Dialog
KW - Pandemie
KW - Distanzlernen
KW - Berufswahl
KW - Ausbildung
SN - 00059536
TI - Berufsausbildung in der Corona-Pandemie. Befunde studentischer Forschungsprojekte
VL - 192
ER -
TY - CHAP
AU - Heisler, Dietmar
AU - Reißland, Jens
AU - Müller, Claudia
AU - Rühr, Laura
AU - Gröger, Simon
ED - Melzig, Christian
ED - Kuhlmeier, Werner
ED - Kretschmer, Susanne
ID - 43182
SN - 978-3-8474-2951-7
T2 - Berufsbildung für nachhaltige Entwicklung. Die Modellversuche 2015-2019 auf dem Weg vom Projekt zur Struktur
TI - Das Analyseraster zu Merkmalen eines nachhaltigen Lernortes für betriebliche Ausbilderinnen und Ausbilder.
ER -
TY - JOUR
AB - Im Fokus steht das Problem der Durchlässigkeit von akademischer und beruflicher Bildung im Kontext aktueller Reformen. Die Erhöhung sozialer Mobilität als Reformziel gerät darin zugunsten der Attraktivitätssteigerung von Bildungsgängen aus dem Blick. Die geringe Durchlässigkeit von Bildungsgängen wird primär als Marketingproblem thematisiert.
AU - Heisler, Dietmar
ID - 43178
JF - Berufsbildung. Zeitschrift für Theorie-Praxis-Dialog
KW - allgemeine Bildung
KW - berufliche BIldung
KW - Durchlässigkeit im Bildungssystem
SN - 00059536
TI - Berufsausbildung zwischen Attraktivitätsverlust und sozialer Ungleichheit Reformen für mehr Durchlässigkeit zwischen beruflicher und akademischer Bildung
VL - 191
ER -
TY - JOUR
AB - We show the existence of ground states in the massless spin boson model without any infrared regularization. Our proof is non-perturbative and relies on a compactness argument. It works for arbitrary values of the coupling constant under the hypothesis that the second derivative of the ground state energy as a function of a constant external magnetic field is bounded.
AU - Hasler, David
AU - Hinrichs, Benjamin
AU - Siebert, Oliver
ID - 43465
IS - 1
JF - Communications in Mathematical Physics
SN - 0010-3616
TI - On Existence of Ground States in the Spin Boson Model
VL - 388
ER -
TY - GEN
AU - Schroeter-Wittke, Harald
ID - 41089
SN - 0540–6226
T2 - Jahrbuch für Evangelische Kirchengeschichte des Rheinlandes
TI - Andrea Strübind / Klaas-Dieter Voß (Hgg.), Märtyrerbücher und ihre Bedeutung für konfessionelle Identität und Spiritualität in der Frühen Neuzeit. Interkonfessionelle und interdisziplinäre Beiträge zur Erforschung einer Buchgattung (SMHR 109), Tübingen 2019
VL - 70
ER -
TY - GEN
AU - Schroeter-Wittke, Harald
ID - 41087
SN - 0540–6226
T2 - Jahrbuch für Evangelische Kirchengeschichte des Rheinlandes
TI - Stefan Alkier (Hg.), Sola Scriptura 1517-2017. Rekonstruktionen – Kritiken – Transformationen – Performanzen (CHTh 7), Tübingen 2019
VL - 70
ER -
TY - CONF
AU - Ahmed, Qazi Arbab
ID - 29138
T2 - 2021 IFIP/IEEE 29th International Conference on Very Large Scale Integration (VLSI-SoC)
TI - Hardware Trojans in Reconfigurable Computing
ER -
TY - JOUR
AU - Schulze, Johanna
ID - 43389
JF - GGG-Magazin: DIE SCHULE für alle
TI - Einzelschulentwicklung gerecht und digital – Einblicke in die empirische Lage und Konsequenzen für die Praxis.
VL - 4
ER -
TY - BOOK
AU - Schulze, Johanna
ID - 43388
TI - Medienkonzepte zur chancengerechten Schulentwicklung. Fallstudien an Schulen mit besonders herausfordernden Schüler*innenkompositionen.
ER -
TY - JOUR
AU - Luo, Kai Hong
AU - Santandrea, Matteo
AU - Stefszky, Michael
AU - Sperling, Jan
AU - Massaro, Marcello
AU - Ferreri, Alessandro
AU - Sharapova, Polina
AU - Herrmann, Harald
AU - Silberhorn, Christine
ID - 26889
JF - Physical Review A
SN - 2469-9926
TI - Quantum optical coherence: From linear to nonlinear interferometers
ER -
TY - JOUR
AU - Lüders, Carolin
AU - Pukrop, Matthias
AU - Rozas, Elena
AU - Schneider, Christian
AU - Höfling, Sven
AU - Sperling, Jan
AU - Schumacher, Stefan
AU - Aßmann, Marc
ID - 26283
JF - PRX Quantum
SN - 2691-3399
TI - Quantifying Quantum Coherence in Polariton Condensates
ER -
TY - JOUR
AU - Bagrets, Dmitry
AU - Kim, Kun Woo
AU - Barkhofen, Sonja
AU - De, Syamsundar
AU - Sperling, Jan
AU - Silberhorn, Christine
AU - Altland, Alexander
AU - Micklitz, Tobias
ID - 26284
JF - Physical Review Research
SN - 2643-1564
TI - Probing the topological Anderson transition with quantum walks
ER -
TY - JOUR
AU - Xue, Yan
AU - Chestnov, Igor
AU - Sedov, Evgeny
AU - Kiktenko, Evgeniy
AU - Fedorov, Aleksey K.
AU - Schumacher, Stefan
AU - Ma, Xuekai
AU - Kavokin, Alexey
ID - 21362
IS - 1
JF - Physical Review Research
SN - 2643-1564
TI - Split-ring polariton condensates as macroscopic two-level quantum systems
VL - 3
ER -
TY - JOUR
AU - Jurgen von Bardeleben, Hans
AU - Cantin, Jean-Louis
AU - Gerstmann, Uwe
AU - Schmidt, Wolf Gero
AU - Biktagirov, Timur
ID - 29747
IS - 19
JF - Nano Letters
KW - Mechanical Engineering
KW - Condensed Matter Physics
KW - General Materials Science
KW - General Chemistry
KW - Bioengineering
SN - 1530-6984
TI - Spin Polarization, Electron–Phonon Coupling, and Zero-Phonon Line of the NV Center in 3C-SiC
VL - 21
ER -
TY - JOUR
AU - Slawig, Diana
AU - Gruschwitz, Markus
AU - Gerstmann, Uwe
AU - Rauls, Eva
AU - Tegenkamp, Christoph
ID - 29748
IS - 36
JF - The Journal of Physical Chemistry C
KW - Surfaces
KW - Coatings and Films
KW - Physical and Theoretical Chemistry
KW - General Energy
KW - Electronic
KW - Optical and Magnetic Materials
SN - 1932-7447
TI - Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene
VL - 125
ER -
TY - JOUR
AU - Jain, Mitisha
AU - Gerstmann, Uwe
AU - Schmidt, Wolf Gero
AU - Aldahhak, Hazem
ID - 40250
IS - 6
JF - Journal of Computational Chemistry
KW - Computational Mathematics
KW - General Chemistry
SN - 0192-8651
TI - Adatom mediated adsorption of N‐heterocyclic carbenes on Cu(111) and Au(111)
VL - 43
ER -
TY - JOUR
AB - High harmonic generation (HHG) from solids shows great application prospects in compact short-wavelength light sources and as a tool for imaging the dynamics in crystals with subnanometer spatial and attosecond temporal resolution. However, the underlying collision dynamics behind solid HHG is still intensively debated and no direct mapping relationship between the collision dynamics with band structure has been built. Here, we show that the electron and its associated hole can be elastically scattered by neighboring atoms when their wavelength approaches the atomic size. We reveal that the elastic scattering of electron/hole from neighboring atoms can dramatically influence the electron recombination with its left-behind hole, which turns out to be the fundamental reason for the anisotropic interband HHG observed recently in bulk crystals. Our findings link the electron/hole backward scattering with Van Hove singularities and forward scattering with critical lines in the band structure and thus build a clear mapping between the band structure and the harmonic spectrum. Our work provides a unifying picture for several seemingly unrelated experimental observations and theoretical predictions, including the anisotropic harmonic emission in MgO, the atomic-like recollision mechanism of solid HHG, and the delocalization of HHG in ZnO. This strongly improved understanding will pave the way for controlling the solid-state HHG and visualizing the structure-dependent electron dynamics in solids.
AU - Zuo, Ruixin
AU - Trautmann, Alexander
AU - Wang, Guifang
AU - Hannes, Wolf-Rüdiger
AU - Yang, Shidong
AU - Song, Xiaohong
AU - Meier, Torsten
AU - Ciappina, Marcelo
AU - Duc, Huynh Thanh
AU - Yang, Weifeng
ID - 37331
JF - Ultrafast Science
SN - 2765-8791
TI - Neighboring Atom Collisions in Solid-State High Harmonic Generation
VL - 2021
ER -
TY - JOUR
AB - AbstractMethylammonium lead iodide perovskite (MAPbI3) is renowned for an impressive power conversion efficiency rise and cost-effective fabrication for photovoltaics. In this work, we demonstrate that polycrystalline MAPbI3s undergo drastic changes in optical properties at moderate field strengths with an ultrafast response time, via transient Wannier Stark localization. The distinct band structure of this material - the large lattice periodicity, the narrow electronic energy bandwidths, and the coincidence of these two along the same high-symmetry direction – enables relatively weak fields to bring this material into the Wannier Stark regime. Its polycrystalline nature is not detrimental to the optical switching performance of the material, since the least dispersive direction of the band structure dominates the contribution to the optical response, which favors low-cost fabrication. Together with the outstanding photophysical properties of MAPbI3, this finding highlights the great potential of this material in ultrafast light modulation and novel photonic applications.
AU - Berghoff, Daniel
AU - Bühler, Johannes
AU - Bonn, Mischa
AU - Leitenstorfer, Alfred
AU - Meier, Torsten
AU - Kim, Heejae
ID - 37338
IS - 1
JF - Nature Communications
KW - General Physics and Astronomy
KW - General Biochemistry
KW - Genetics and Molecular Biology
KW - General Chemistry
KW - Multidisciplinary
SN - 2041-1723
TI - Low-field onset of Wannier-Stark localization in a polycrystalline hybrid organic inorganic perovskite
VL - 12
ER -
TY - JOUR
AU - Thong, Le Huu
AU - Ngo, Cong
AU - Duc, Huynh Thanh
AU - Song, Xiaohong
AU - Meier, Torsten
ID - 23477
JF - Physical Review B
SN - 2469-9950
TI - Microscopic analysis of high harmonic generation in semiconductors with degenerate bands
VL - 103
ER -
TY - JOUR
AB - Lithium niobate (LiNbO3), a material frequently used in optical applications, hosts different kinds of polarons that significantly affect many of its physical properties. In this study, a variety of electron polarons, namely free, bound, and bipolarons, are analyzed using first-principles calculations. We perform a full structural optimization based on density-functional theory for selected intrinsic defects with special attention to the role of symmetry-breaking distortions that lower the total energy. The cations hosting the various polarons relax to a different degree, with a larger relaxation corresponding to a larger gap between the defect level and the conduction-band edge. The projected density of states reveals that the polaron states are formerly empty Nb 4d states lowered into the band gap. Optical absorption spectra are derived within the independent-particle approximation, corrected by the GW approximation that yields a wider band gap and by including excitonic effects within the Bethe-Salpeter equation. Comparing the calculated spectra with the density of states, we find that the defect peak observed in the optical absorption stems from transitions between the defect level and a continuum of empty Nb 4d states. Signatures of polarons are further analyzed in the reflectivity and other experimentally measurable optical coefficients.
AU - Schmidt, Falko
AU - Kozub, Agnieszka L.
AU - Gerstmann, Uwe
AU - Schmidt, Wolf Gero
AU - Schindlmayr, Arno
ID - 21946
JF - Crystals
TI - Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response
VL - 11
ER -
TY - CONF
AB - Population/mixing-time-dependent two-dimensional coherent spectra are presented for exciton-polaritons in a microcavity. Theory based on dynamically-controlled truncation reveals coherent and incoherent contributions to the decay dynamics.
AU - Meier, Torsten
AU - Paul, Jagannath
AU - Rose, Hendrik
AU - Wahlstrand, Jared K
AU - Bristow, Alan D
ID - 43746
SN - 978-1-55752-308-2
T2 - Frontiers in Optics
TI - Coherent and incoherent contribution of population dynamics of semiconductor exciton-polaritons
ER -
TY - CONF
AU - Reichelt, Matthias
AU - Rose, Hendrik
AU - Kosarev, Alexander N.
AU - Poltavtsev, Sergey V.
AU - Bayer, Manfred
AU - Akimov, Ilya A.
AU - Schneider, Christian
AU - Kamp, Martin
AU - Höfling, Sven
AU - Meier, Torsten
ED - Betz, Markus
ED - Elezzabi, Abdulhakem Y.
ID - 23474
T2 - Ultrafast Phenomena and Nanophotonics XXV
TI - Controlling the emission time of photon echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles
VL - 11684
ER -
TY - JOUR
AU - Murzakhanov, F. F.
AU - Yavkin, B. V.
AU - Mamin, G. V.
AU - Orlinskii, S. B.
AU - von Bardeleben, H. J.
AU - Biktagirov, Timur
AU - Gerstmann, Uwe
AU - Soltamov, V. A.
ID - 29749
JF - Physical Review B
SN - 2469-9950
TI - Hyperfine and nuclear quadrupole splitting of the NV− ground state in 4H-SiC
VL - 103
ER -
TY - JOUR
AU - Aldahhak, Hazem
AU - Hogan, Conor
AU - Lindner, Susi
AU - Appelfeller, Stephan
AU - Eisele, Holger
AU - Schmidt, Wolf Gero
AU - Dähne, Mario
AU - Gerstmann, Uwe
AU - Franz, Martin
ID - 22010
JF - Physical Review B
SN - 2469-9950
TI - Electronic structure of the Si(111)3×3R30∘−B surface from theory and photoemission spectroscopy
VL - 103
ER -
TY - JOUR
AU - Rose, Hendrik
AU - Popolitova, D. V.
AU - Tikhonova, O. V.
AU - Meier, Torsten
AU - Sharapova, Polina
ID - 23478
JF - Physical Review A
SN - 2469-9926
TI - Dark-state and loss-induced phenomena in the quantum-optical regime of Λ-type three-level systems
VL - 103
ER -
TY - JOUR
AU - Belobo, Didier Belobo
AU - Meier, Torsten
ID - 23473
JF - New Journal of Physics
SN - 1367-2630
TI - Approximate nonlinear wave solutions of the coupled two-component Gross–Pitaevskii equations with spin–orbit interaction
VL - 23
ER -
TY - JOUR
AU - Nguyen, T. T. Nhung
AU - Sollfrank, T.
AU - Tegenkamp, C.
AU - Rauls, E.
AU - Gerstmann, Uwe
ID - 22881
JF - Physical Review B
SN - 2469-9950
TI - Impact of screening and relaxation on weakly coupled two-dimensional heterostructures
VL - 103
ER -
TY - JOUR
AB - Modern forming processes often allow today the efficient production of complex parts. In order to increase the sustainability of forming processes it would be favorable if the forming of workpieces becomes possible using production waste. At the Chair of Forming and Machining Technology of the Paderborn University (LUF) research is presently conducted with the overall goal to produce workpieces directly from secondary aluminum (e.g., powder and chips). Therefore, friction-based forming processes like friction spinning (or cognate processes) are used due to their high efficiency. As a pre-step, the production of semi-finished parts was the subject of accorded research work at the LUF. Therefore, a friction-based hot extrusion process was used for the full recycling or rework of aluminum chips into profiles. Investigations of the recycled semi-finished products show that they are comparable to conventionally produced semi-finished products in terms of dimensional stability and shape accuracy. An analysis of the mechanical properties of hardness and tensile strength shows that a final product with good and homogeneously distributed properties can be produced. Furthermore, significant correlations to the friction spinning process could be found that are useful for the above-mentioned direct part production from secondary aluminum.
AU - Borgert, Thomas
AU - Homberg, Werner
ID - 21635
JF - Metals
SN - 2075-4701
TI - Friction-Induced Recycling Process for User-Specific Semi-Finished Product Production
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Flachmann, Felix
ID - 23746
SN - 978-1-7138-3075-7
T2 - SPE ANTEC 2021: The Annual Technical Conference for Plastic Professionals
TI - Influence of Chemical Blowing Agents on the Filling Behavior of Wood-Plastic-Composite Melts
ER -
TY - JOUR
AU - Bolenz, Lukas
AU - Ehlert, Thomas
AU - Dechert, Christopher
AU - Bertling, René
AU - Kenig, Eugeny
ID - 23789
JF - Chemical Engineering Research and Design
SN - 0263-8762
TI - Modelling of a continuous distillation process with finite reflux ratio using the hydrodynamic analogy approach
ER -
TY - CONF
AB - Driven by the CO2-emission law by the European government and the increasing costs for raw materials as well as energy, the automotive industry is increasingly using multi-material constructions. This leads to a continuous increase in the use of mechanical joining techniques and especially the self-piercing riveting is of particular importance. The reason for this is the wide range of joining possibilities as well as the high load-bearing capacities of the joints. To be able to react to changing boundary conditions, like material thickness or strength variation of the sheets, research work is crucial with regard to the increase of versatility. In this paper, a numerical study of the influences on the selfpiercing riveting process is presented. For this purpose, the influence of different process parameters such as rivet length and die depth on various quality-relevant characteristics were investigated. With the help of the design of experiment, significant influences were determined and interactions between the individual parameters are shown.
AU - Kappe, Fabian
AU - Bielak, Christian Roman
AU - Sartisson, Vadim
AU - Bobbert, Mathias
AU - Meschut, Gerson
ID - 34222
T2 - ESAFORM 2021
TI - Influence of rivet length on joint formation on self-piercing riveting process considering further process parameters
ER -
TY - CONF
AB - In many areas of product manufacturing constructions consist of individual components and metal sheets that are joined together to form complex structures. A simple and industrial common method for joining dissimilar and coated materials is clinching. During the joining process and due to the service load cracks can occur in the area of the joint, propagate due to cyclic loading and consequently lead to structural failure. For the prevention of these damage cases, first of all knowledge about the fracture mechanical material parameters regarding the original material state of the sheet metals used within the clinching process are essential.Within the scope of this paper experimental and numerical preliminary investigations regarding the fracture mechanical behavior of sheet metals used within the clinching process are presented. Due to the low thickness of 1.5 mm of the material sheets, the development of a new specimen is necessary to determine the crack growth rate curve including the fracture mechanical parameters like the threshold against crack growth ΔKI,th and the fracture toughness KIC of the base material HCT590X. For the experimental determination of the crack growth rate curve the numerical calculation of the geometry factor function as well as the calibration function of this special specimen are essential. After the experimental validation of the numerically determined calibration function, crack growth rate curves are determined for the stress ratios R = 0.1 and R = 0.3 to examine the mean stress sensitivity. In addition, the different rolling directions of 0° and 90° in relation to the initial crack are taken into account in order to investigate the influence of the anisotropy due to rolling.
AU - Weiß, Deborah
AU - Schramm, Britta
AU - Kullmer, Gunter
ID - 30675
KW - Mechanical Engineering
KW - Mechanics of Materials
KW - General Materials Science
SN - 1662-9795
T2 - Key Engineering Materials
TI - Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X
VL - 883
ER -
TY - JOUR
AB - AbstractIn addition to the classical strength calculation, it is important to design components with regard to fracture mechanics because defects and cracks in a component can drastically influence its strength or fatigue behavior. Cracks can propagate due to operational loads and consequently lead to component failure. The fracture mechanical analysis provides information on stable or unstable crack growth as well as about the direction and the growth rate of a crack. For this purpose, sufficient information has to be available about the crack location, the crack length, the component geometry, the component loading and the fracture mechanical material parameters. The fracture mechanical properties are determined experimentally with standardized specimens as defined by the guidelines of the American Society for Testing and Materials. In practice, however, especially in the context with damage cases or formed material fracture mechanical parameters directly for a component are of interest. However, standard specimens often cannot be extracted at all due to the complexity of the component geometry. Therefore, the development of special specimens is required whereby certain arrangements have to be made in advance. These arrangements are presented in the present paper in order to contribute to a holistic investigation chain for the experimental determination of fracture mechanical material parameters with special specimens.
AU - Weiß, Deborah
AU - Schramm, Britta
AU - Kullmer, Gunter
ID - 30674
JF - Production Engineering
KW - Industrial and Manufacturing Engineering
KW - Mechanical Engineering
SN - 0944-6524
TI - Holistic investigation chain for the experimental determination of fracture mechanical material parameters with special specimens
ER -
TY - JOUR
AB - Powder X-ray diffraction (XRD) patterns of ordered mesoporous CMK-8 and CMK-9 carbon materials are simulated by geometric modeling. The materials are amorphous at the atomic length scale but exhibit highly symmetric gyroidal structures at the nanometer scale, corresponding to regular, continuous nanopore systems with cubic symmetry. Their structures lead to characteristic low-angle XRD signatures. We introduce a model based on geometrical considerations to simulate CMK-8 and CMK-9 structures with variable volume fraction of carbon (vs. pore volume, i.e., variable 'pore wall thickness'). In addition, we also simulate carbon materials with variable amounts of guest species (e.g., sulfur) residing in their pores. The corresponding XRD patterns are calculated. The carbon volume fraction turns out to have a significant impact on the relative diffraction peak intensities, especially in case of CMK-9 carbon that features a bimodal porosity. Likewise, the presence of guest species in the pores may also strongly affect the relative peak intensities. Our study suggests that careful evaluation of experimental low-angle XRD patterns of (real) CMK-8 or CMK-9 materials offers an opportunity to obtain detailed information about the nanostructural properties in addition to the mere identification of the pore systems geometry.
AU - Schwind, Bertram
AU - Smått, Jan-Henrik
AU - Tiemann, Michael
AU - Weinberger, Christian
ID - 25894
JF - Microporous and Mesoporous Materials
SN - 1387-1811
TI - Modeling of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns
ER -
TY - JOUR
AB - A comparison of infrared spectroscopic analytical approaches was made in order to assess their applicability for internal structure characterization of SiO2 thin films. Markers for porosity and/or disorder based on the analysis of the asymmetric stretching absorption band of SiO2 between 900−1350 cm−1 were discussed. The shape of this band, which shows a well-defined LO–TO splitting, depends not only on the inherent characteristics of the film under analysis but also on the particular geometry of the IR experiment and the specific surface selection rules of the substrate. Three types of SiO2 thin films with clearly defined porosity ranging from dense films to mesoporous films were investigated by transmission (at different incidence angles), direct specular reflection (at different angles), and diffuse reflection. Two different types of substrate, metallic and semiconducting, were used. The combined effect of substrate and specific technique in the final shape of the band, was discussed, and the efficacy for their applicability to the determination of porosity in thin SiO2 films was critically evaluated.
AU - de los Arcos, Teresa
AU - Müller, Hendrik
AU - Wang, Fuzeng
AU - Damerla, Varun Raj
AU - Hoppe, Christian
AU - Weinberger, Christian
AU - Tiemann, Michael
AU - Grundmeier, Guido
ID - 25897
JF - Vibrational Spectroscopy
SN - 0924-2031
TI - Review of infrared spectroscopy techniques for the determination of internal structure in thin SiO2 films
ER -
TY - THES
AU - Olenberg, Alexander
ID - 42812
SN - 9783843947855
TI - Untersuchung und Optimierung von strukturierten Packungen mittels CFD-Simulationen
ER -
TY - JOUR
AB - Tailor-made ordered mesoporous materials bear great potential in numerous fields of application where large interfaces are required. However, the inherent surfacechemical properties of conventional materials, such as silica, carbon or organosilica, poses some limitations with respect to their application. Surface manipulation by functionalization with chemically more reactive groups is one way to improve materials for their desired purpose. Another approach is the design of high surface-area composite materials. The surface manipulation, either by functionalization or by introducing guest species, can be performed selectively. This means that when several distinct, i.e. , hierarchical, types of surfaces or pore systems exist in a material, each of them may be chosen for manipulation. Several strategies can be identified to achieve this goal. Molecules or molecule assemblies can be utilized to temporarily protect pores or surfaces (soft protection), while manipulation occurs at the accessible sites. This approach is a recurring motive in this review and can also be applied to rigid template matrices (hard protection). Furthermore, the size of functionalization agents (size protection) and their reactivity/diffusion (kinetic protection) into the pores can also be utilized to achieve selectivity. In addition, challenges in the synthesis and characterization of selectively manipulated ordered mesoporous materials are discussed.
AU - Tiemann, Michael
AU - Weinberger, Christian
ID - 25893
JF - Advanced Materials Interfaces
SN - 2196-7350
TI - Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 41431
IS - 1
JF - tripleC: Communication, Capitalism & Critique
TI - Engels@200: Friedrich Engels in the Age of Digital Capitalism
VL - 19
ER -
TY - JOUR
AU - Fuchs, Christian
AU - Dyer-Witheford, Nick
ID - 41599
JF - 国际社会科学杂志 (Journal of International Social Sciences) 2021 (9)
TI - 卡尔·马克思与互联网研究
ER -
TY - JOUR
AB - In this report, a flame spray pyrolysis setup has been examined with various in situ extraction methods of particle samples along the flame axis. First, two precursor formulations leading to the formation of iron oxide nanoparticles were used in a standardized SpraySyn burner system, and the final particle outcome was characterized by a broad range of established powder characterization techniques (TEM/HRTEM, SAXS, XRD, BET). The characterization of the powder products evidenced that mostly homogeneous gas-to-particle conversion takes place when applying an acidic precursor solution, whereas the absence of the acid leads to a dominant droplet-to-particle pathway. Our study indicates that a droplet-to-particle-pathway could be present even when processing the acidic formulation. However, even if a secondary pathway might take place in this case as well, it is not dominant and nearly negligible. Subsequently, the in situ particle structure evolution was investigated for the dominant gas-to-particle pathway, and particles were extracted along the flame axis for online SMPS and offline TEM/HRTEM analysis. Due to the highly reactive conditions within the flame (high temperatures, turbulent flow field, high particle number concentrations), the extraction of representative samples from spray flames is challenging. In order to handle the reactive conditions, two extraction techniques were tailored in this report. To extract an aerosol sample within the flame for SMPS measurement, a Hole in a Tube probe was adjusted. Thus, the mobility particle diameter as well as the corresponding distribution widths were obtained at different heights above the burner along the flame axis. For TEM/HRTEM image analysis, particle samples were collected thermophoretically by means of a tailored shutter system. Since all sampling grids were protected until reaching the flame axis and due to the low sampling time, momentary captures of local particle structures could be extracted precisely. The particle morphologies have clearly shown an evolution from spherical and paired particles in the flame center to fractal and compact agglomerates at later synthesis stages.
AU - Tischendorf, R.
AU - Simmler, M.
AU - Weinberger, Christian
AU - Bieber, M.
AU - Reddemann, M.
AU - Fröde, F.
AU - Lindner, J.
AU - Pitsch, H.
AU - Kneer, R.
AU - Tiemann, Michael
AU - Nirschl, H.
AU - Schmid, H.-J.
ID - 25896
JF - Journal of Aerosol Science
SN - 0021-8502
TI - Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques
ER -
TY - JOUR
AB - Photodynamic therapy (PDT) using TiO2 nanoparticles has become an important alternative treatment for different types of cancer due to their high photocatalytic activity and high absorption of UV-A light. To potentiate this treatment, we have coated commercial glass plates with TiO2 nanoparticles prepared by the sol–gel method (TiO2-m), which exhibit a remarkable selectivity for the irreversible trapping of cancer cells. The physicochemical properties of the deposited TiO2-m nanoparticle coatings have been characterized by a number of complementary surface-analytical techniques and their interaction with leukemia and healthy blood cells were investigated. Scanning electron and atomic force microscopy verify the formation of a compact layer of TiO2-m nanoparticles. The particles are predominantly in the anatase phase and have hydroxyl-terminated surfaces as revealed by Raman, X-ray photoelectron, and infrared spectroscopy, as well as X-ray diffraction. We find that lymphoblastic leukemia cells adhere to the TiO2-m coating and undergo amoeboid-like migration, whereas lymphocytic cells show distinctly weaker interactions with the coating. This evidences the potential of this nanomaterial coating to selectively trap cancer cells and renders it a promising candidate for the development of future prototypes of PDT devices for the treatment of leukemia and other types of cancers with non-adherent cells.
AU - Garcia Diosa, Jaime Andres
AU - Gonzalez Orive, Alejandro
AU - Weinberger, Christian
AU - Schwiderek, Sabrina
AU - Knust, Steffen
AU - Tiemann, Michael
AU - Grundmeier, Guido
AU - Keller, Adrian
AU - Camargo Amado, Ruben Jesus
ID - 22635
JF - Journal of Biomedical Materials Research Part B: Applied Biomaterials
SN - 1552-4973
TI - TiO2 nanoparticle coatings on glass surfaces for the selective trapping of leukemia cells from peripheral blood
VL - 109
ER -
TY - JOUR
AB - The tetratopic linker 1,1,2,2-tetrakis(4-phosphonophenyl)ethylene (H8TPPE) was used to synthesize the three new porous metal–organic frameworks of composition [M2(H2O)2(H2TPPE)]·xH2O (M = Al3+, Ga3+, Fe3+), denoted as M-CAU-53 under hydrothermal reaction conditions, using the corresponding metal nitrates as starting materials. The crystal structures of the compounds were determined ab initio from powder X-ray diffraction data, revealing small structural differences. Proton conductivity measurements were carried out, indicating different conductivity mechanisms. The differences in proton conductivity could be linked to the individual structures. In addition, a thorough characterization via thermogravimetry, elemental analysis, IR-spectroscopy as well as N2- and H2O-sorption is given.
AU - Steinke, Felix
AU - Javed, Ali
AU - Wöhlbrandt, Stephan
AU - Tiemann, Michael
AU - Stock, Norbert
ID - 25892
JF - Dalton Transactions
SN - 1477-9226
TI - New isoreticular phosphonate MOFs based on a tetratopic linker
ER -
TY - CHAP
AU - Eickelmann, Birgit
ID - 29061
T2 - Chancen denken. Impulse für eine offene und mutige Gesellschaft im 21. Jahrhundert
TI - Etwas anarchischer, freier, ungewohnter (Ein Gespräch mit Birgit Eickelmann)
ER -
TY - CHAP
AU - Eickelmann, Birgit
AU - Maaz, Kai
ED - Maaz, Kai
ED - Becker-Mrotzek, Michael
ID - 29062
T2 - Schule weiter denken
TI - Ungleichheiten im Bildungssystem – eine unangenehme Konstante. Sinnvolle Maßnahmen und die Grenzen des Möglichen
ER -
TY - GEN
AU - Bonanati, Sabrina
AU - Buhl, Heike M.
AU - Eickelmann, Birgit
ID - 29066
TI - Wie Lernen in digitalen Lernumgebungen motivieren kann – Stichwort: Gamification
ER -
TY - JOUR
AB - Abstract
Objective
External focus (EF) of attention leads to improved balance performance. Consideration of the neuromodulatory effects of EF may inform its clinical utility in addressing neuroplastic impairments after musculoskeletal injuries. We aimed to determine whether electrocortical activity and balance performance changed with attentional foci that prioritized differing sensory feedback and whether changes in electrocortical activity and balance were associated.
Methods
Individuals who were healthy (n = 15) performed a single-limb balance task under 3 conditions: internal focus (IF), somatosensory focus [EF with a baton (EF-baton)], and visual focus [EF with a laser (EF-laser)]. Electrocortical activity and postural sway were recorded concurrently using electroencephalography and a triaxial force plate. Electroencephalographic signals were decomposed, localized, and clustered to generate power spectral density in θ and α-2 frequency bands. Postural sway signals were analyzed with center-of-pressure sway metrics (eg, area, distance, velocity) and knee angle. The relationship between percent change in clustered brain activity and task performance metrics was assessed.
Results
Both EF conditions resulted in increased cortical activity and improved balance performance compared to IF. EF-laser had the largest effect, demonstrating increased frontal θ power (d = 0.64), decreased central θ power (d = −0.30), and decreased bilateral motor, bilateral parietal, and occipital α-2 power (d = −1.38 to −4.27) as well as a shorter path distance (d = −0.94) and a deeper (d = 0.70) and less variable (d = −1.15) knee angle than IF. Weak to moderate associations exist between increases in cortical activity and improved balance performance (ρ = 0.405–0.584).
Conclusions
EF resulted in increased cortical activity associated with cognitive, motor, somatosensory, and visual processing. EF-laser, which prioritized visual feedback, had the largest and broadest effects. Changes in cortical activity resulting from EF were independently associated with improved balance performance.
Impact
This study demonstrates that goal-oriented attention results in functional increases in brain activity compared to internally directed self-focus. These results suggest EF may target neurophysiologic impairments and improve balance in clinical populations.
AU - Sherman, David A
AU - Lehmann, Tim
AU - Baumeister, Jochen
AU - Gokeler, Alli
AU - Donovan, Luke
AU - Norte, Grant E
ID - 34024
JF - Physical Therapy
KW - Physical Therapy
KW - Sports Therapy and Rehabilitation
SN - 0031-9023
TI - External Focus of Attention Influences Cortical Activity Associated with Single Limb Balance Performance
ER -
TY - JOUR
AB - Whereas initial findings have already identified cortical patterns accompanying proprioceptive deficiencies in patients after anterior cruciate ligament reconstruction (ACLR), little is known about compensatory sensorimotor mechanisms for re-establishing postural control. Therefore, the aim of the present study was to explore leg dependent patterns of cortical contributions to postural control in patients 6 weeks following ACLR. A total of 12 patients after ACLR (25.1 ± 3.2 years, 178.1 ± 9.7 cm, 77.5 ± 14.4 kg) and another 12 gender, age, and activity matched healthy controls participated in this study. All subjects performed 10 × 30 s. single leg stances on each leg, equipped with 64-channel mobile electroencephalography (EEG). Postural stability was quantified by area of sway and sway velocity. Estimations of the weighted phase lag index were conducted as a cortical measure of functional connectivity. The findings showed significant group × leg interactions for increased functional connectivity in the anterior cruciate ligament (ACL) injured leg, predominantly including fronto−parietal [F(1, 22) = 8.41, p ≤ 0.008, η2 = 0.28], fronto−occipital [F(1, 22) = 4.43, p ≤ 0.047, η2 = 0.17], parieto−motor [F(1, 22) = 10.30, p ≤ 0.004, η2 = 0.32], occipito−motor [F(1, 22) = 5.21, p ≤ 0.032, η2 = 0.19], and occipito−parietal [F(1, 22) = 4.60, p ≤ 0.043, η2 = 0.17] intra−hemispherical connections in the contralateral hemisphere and occipito−motor [F(1, 22) = 7.33, p ≤ 0.013, η2 = 0.25] on the ipsilateral hemisphere to the injured leg. Higher functional connectivity in patients after ACLR, attained by increased emphasis of functional connections incorporating the somatosensory and visual areas, may serve as a compensatory mechanism to control postural stability of the injured leg in the early phase of rehabilitation. These preliminary results may help to develop new neurophysiological assessments for detecting functional deficiencies after ACLR in the future.
AU - Lehmann, Tim
AU - Büchel, Daniel
AU - Mouton, Caroline
AU - Gokeler, Alli
AU - Seil, Romain
AU - Baumeister, Jochen
ID - 32434
JF - Frontiers in Human Neuroscience
KW - Behavioral Neuroscience
KW - Biological Psychiatry
KW - Psychiatry and Mental health
KW - Neurology
KW - Neuropsychology and Physiological Psychology
SN - 1662-5161
TI - Functional Cortical Connectivity Related to Postural Control in Patients Six Weeks After Anterior Cruciate Ligament Reconstruction
VL - 15
ER -
TY - JOUR
AB - Abstract Mobile Electroencephalography (EEG) provides insights into cortical contributions to postural control. Although changes in theta (4–8 Hz) and alpha frequency power (8–12 Hz) were shown to reflect attentional and sensorimotor processing during balance tasks, information about the effect of stance leg on cortical processing related to postural control is lacking. Therefore, the aim was to examine patterns of cortical activity during single-leg stance with varying surface stability. EEG and force plate data from 21 healthy males (22.43 ± 2.23 years) was recorded during unipedal stance (left/right) on a stable and unstable surface. Using source-space analysis, power spectral density was analyzed in the theta, alpha-1 (8–10 Hz) and alpha-2 (10–12 Hz) frequency bands. Repeated measures ANOVA with the factors leg and surface stability revealed significant interaction effects in the left (p = 0.045, ηp2 = 0.13) and right motor clusters (F = 16.156; p = 0.001, ηp2 = 0.41). Furthermore, significant main effects for surface stability were observed for the fronto-central cluster (theta), left and right motor (alpha-1), as well as for the right parieto-occipital cluster (alpha-1/alpha-2). Leg dependent changes in alpha-2 power may indicate lateralized patterns of cortical processing in motor areas during single-leg stance. Future studies may therefore consider lateralized patterns of cortical activity for the interpretation of postural deficiencies in unilateral lower limb injuries.
AU - Büchel, Daniel
AU - Lehmann, Tim
AU - Ullrich, Sarah
AU - Cockcroft, John
AU - Louw, Quinette
AU - Baumeister, Jochen
ID - 32435
IS - 4
JF - Experimental Brain Research
KW - General Neuroscience
SN - 0014-4819
TI - Stance leg and surface stability modulate cortical activity during human single leg stance
VL - 239
ER -
TY - JOUR
AU - Büchel, Daniel
AU - Lehmann, Tim
AU - Sandbakk, Øyvind
AU - Baumeister, Jochen
ID - 35626
IS - 1
JF - Scientific Reports
KW - Multidisciplinary
SN - 2045-2322
TI - EEG‑derived brain graphs are reliable measures for exploring exercise‑induced changes in brain networks
VL - 11
ER -
TY - GEN
AU - Neukötter, Moritz
AU - Jesinghausen, Steffen
AU - Schmid, Hans-Joachim
ID - 24475
TI - Theoretische Beschreibung des Tropfenbildungsprozesses bei der Filament Extension Atomization: Entwicklung eines Vorhersagemodells für die Tropfengröße (Poster)
ER -
TY - GEN
AU - Neukötter, Moritz
AU - Jesinghausen, Steffen
AU - Schmid, Hans-Joachim
ID - 30221
TI - Filament Extension Atomization – A novel Process for Powder Production? (Presentation)
ER -
TY - JOUR
AU - Möhring, Julia
AU - Krumhöfner, Anika
AU - Gräfin von Plettenberg, Elisabeth Gudila Sophia Ida Maria
ID - 43016
JF - -
TI - Bewegungsförderung in Ganztagsschulen
ER -
TY - GEN
AU - Leineweber, Jonas
ID - 33210
TI - Veranstaltungsbericht: Immaterielles Kulturerbe in Nordrhein-Westfalen – Steigerlied und Trinkhallenkultur im Ruhrgebiet erhalten Auszeichnung anlässlich der Neuaufnahmen in das nordrhein-westfälische Landesinventar
ER -
TY - GEN
AU - Leineweber, Jonas
ID - 33209
TI - Tagungsbericht: Immaterielles Kulturerbe und regionale Identität. Gesellschaftliche Repräsentation und Partizipation im Schützenwesen
ER -
TY - JOUR
AB - Zinc oxide nanoparticles (ZnO NP) used for the channel region in inverted coplanar setup in Thin Film Transistors (TFT) were the focus of this study. The regions between the source electrode and the ZnO NP and the drain electrode were under investigation as they produce a Schottky barrier in metal-semiconductor interfaces. A more general Thermionic emission theory must be evaluated: one that considers both metal/semiconductor interfaces (MSM structures). Aluminum, gold, and nickel were used as metallization layers for source and drain electrodes. An organic-inorganic nanocomposite was used as a gate dielectric. The TFTs transfer and output characteristics curves were extracted, and a numerical computational program was used for fitting the data; hence information about Schottky Barrier Height (SBH) and ideality factors for each TFT could be estimated. The nickel metallization appears with the lowest SBH among the metals investigated. For this metal and for higher drain-to-source voltages, the SBH tended to converge to some value around 0.3 eV. The developed fitting method showed good fitting accuracy even when the metallization produced different SBH in each metal-semiconductor interface, as was the case for gold metallization. The Schottky effect is also present and was studied when the drain-to-source voltages and/or the gate voltage were increased.
AU - Kaufmann, Ivan Rodrigo
AU - Zerey, Onur
AU - Meyers, Thorsten
AU - Reker, Julia
AU - Vidor, Fábio
AU - Hilleringmann, Ulrich
ID - 39383
IS - 5
JF - Nanomaterials
KW - General Materials Science
KW - General Chemical Engineering
SN - 2079-4991
TI - A Study about Schottky Barrier Height and Ideality Factor in Thin Film Transistors with Metal/Zinc Oxide Nanoparticles Structures Aiming Flexible Electronics Application
VL - 11
ER -
TY - CONF
AU - Reker, Julia
AU - Meyers, Thorsten
AU - Vidor, Fabio F.
AU - Joubert, Trudi-Heleen
AU - Hilleringmann, Ulrich
ID - 39395
T2 - 2021 Smart Systems Integration (SSI)
TI - Complementary Inverter Circuits on Flexible Substrates
ER -
TY - CONF
AU - Hilleringmann, Ulrich
AU - Petrov, Dmitry
AU - Mwammenywa, Ibrahim
AU - Kagarura, Geoffrey M.
ID - 39381
T2 - 2021 IEEE AFRICON
TI - Local Power Control using Wireless Sensor System for Microgrids in Africa
ER -
TY - CONF
AU - Andrews, George
AU - Hilleringmann, Ulrich
AU - Joubert, Trudi-Heleen
ID - 39385
T2 - 2021 IEEE AFRICON
TI - The Viability of a Non-Flow Capacitive Biosensing Microsystem for Whole Cell Counting
ER -
TY - CONF
AU - Andrews, George
AU - Hilleringmann, Ulrich
AU - Joubert, Trudi-Heleen
ID - 39386
T2 - 2021 IEEE AFRICON
TI - The Viability of a Non-Flow Capacitive Biosensing Microsystem for Whole Cell Counting
ER -
TY - CHAP
AU - Gerhardts, Lara
AU - Dehmel, Lukas
AU - Meister, Dorothee M.
ED - Wolf, Karsten D
ED - Rummler, Klaus
ED - Bettinger, Patrick
ED - Aßmann, Sandra
ID - 43143
T2 - Jahrbuch Medienpädagogik 16. Medienpädagogik in Zeiten einer tiefgreifenden Mediatisierung
TI - Die berufliche Tabletaneignung von Lehrkräften als Beispiel der Mediatisierung pädagogischer Handlungskontexte. Theoretische Perspektiven und empirische Befunde
ER -
TY - CHAP
AU - Dehmel, Lukas
ED - Bernhard-Skala,, Christian
ED - Bolten-Bühler, Ricarda
ED - Koller, Julia
ED - Rohs, Matthias
ED - Wahl, Johannes
ID - 43142
T2 - Erwachsenenpädagogische Digitalisierungsforschung. Impulse - Befunde - Perspektiven. Bielefeld
TI - Zur Entgrenzung der Arbeit des medienpädagogischen Weiterbildungspersonals im Kontext tiefgreifender Mediatisierung
ER -
TY - JOUR
AU - Hälterlein, Jens
ID - 43278
IS - 1
JF - Big Data & Society
TI - Epistemologies of predictive policing: Mathematical social science, social physics and machine learning
VL - 8
ER -
TY - JOUR
AB - Let E be an ordinary elliptic curve over a finite field and g be a positive integer. Under some technical assumptions, we give an algorithm to span the isomorphism classes of principally polarized abelian varieties in the isogeny class of E⁹ . The varieties are first described as hermitian lattices over (not necessarily maximal) quadratic orders and then geometrically in terms of their algebraic theta null point. We also show how to algebraically compute Siegel modular forms of even weight given as polynomials in the theta constants by a careful choice of an affine lift of the theta null point. We then use these results to give an algebraic computation of Serre’s obstruction for principally polarized abelian threefolds isogenous to E³ and of the Igusa modular form in dimension 4. We illustrate our algorithms with examples of curves with many rational points over finite fields.
AU - Kirschmer, Markus
AU - Narbonne, Fabien
AU - Ritzenthaler, Christophe
AU - Robert, Damien
ID - 34912
IS - 333
JF - Mathematics of Computation
KW - Applied Mathematics
KW - Computational Mathematics
KW - Algebra and Number Theory
SN - 0025-5718
TI - Spanning the isogeny class of a power of an elliptic curve
VL - 91
ER -
TY - GEN
AU - Schroeter-Wittke, Harald
ID - 41088
SN - 0540–6226
T2 - Jahrbuch für Evangelische Kirchengeschichte des Rheinlandes
TI - Anette Baumann / Alexander Jendorff / Frank Theisen (Hgg.), Religion – Migration – Integration. Studien zu Wechselwirkungen religiös motivierter Mobilität im vormodernen Europa, Tübingen 2019
VL - 70
ER -
TY - GEN
AU - Schroeter-Wittke, Harald
ID - 41090
SN - 0540–6226
T2 - Jahrbuch für Evangelische Kirchengeschichte des Rheinlandes
TI - Hendrik Meyer-Magister, Wehrdienst und Verweigerung als komplementäres Handeln. Individualisierungsprozesse im bundesdeutschen Protestantismus der 1950er Jahre (RBRD 7), Tübingen 2019
VL - 70
ER -
TY - GEN
AU - Schroeter-Wittke, Harald
ID - 41091
SN - 0540–6226
T2 - Jahrbuch für Evangelische Kirchengeschichte des Rheinlandes
TI - Jutta Stander-Dulisch, Glaubenskrisen, Neue Religionen und der Papst. Religion in „Stern“ und Spiegel“ von 1960 bis 2014, Bielefeld 2019
VL - 70
ER -
TY - JOUR
AB - The relativistic wave equations determine the dynamics of quantum fields in the context of quantum field theory. One of the conventional tools for dealing with the relativistic bound state problem is the Klein-Fock-Gordon equation. In this work, using a developed scheme, we present how to surmount the centrifugal part and solve the modified Klein-Fock-Gordon equation for the linear combination of Hulthén and Yukawa potentials. In particular, we show that the relativistic energy eigenvalues and corresponding radial wave functions are obtained from supersymmetric quantum mechanics by applying the shape invariance concept. Here, both scalar potential conditions, which are whether equal and nonequal to vector potential, are considered in the calculation. The energy levels and corresponding normalized eigenfunctions are represented as a recursion relation regarding the Jacobi polynomials for arbitrary
states. Beyond that, a closed form of the normalization constant of the wave functions is found. Furthermore, we state that the energy eigenvalues are quite sensitive with potential parameters for the quantum states. The nonrelativistic and relativistic results obtained within SUSY QM overlap entirely with the results obtained by ordinary quantum mechanics, and it displays that the mathematical implementation of SUSY quantum mechanics is quite perfect.
AU - Ahmadov, A. I.
AU - Aslanova, S. M.
AU - Orujova, M. Sh.
AU - Badalov, S. V.
ED - Vagnozzi, Sunny
ID - 44042
JF - Advances in High Energy Physics
KW - Nuclear and High Energy Physics
SN - 1687-7365
TI - Analytical Bound State Solutions of the Klein-Fock-Gordon Equation for the Sum of Hulthén and Yukawa Potential within SUSY Quantum Mechanics
VL - 2021
ER -
TY - CONF
AU - Meydani, Elnaz
AU - Düsing, Christoph
AU - Trier, Matthias
ID - 44073
T2 - Innovation Through Information Systems: Volume II: A Collection of Latest Research on Technology Issues
TI - Towards a Trust-Aware Item Recommendation System on a Graph Autoencoder with Attention Mechanism
ER -
TY - JOUR
AU - Neufeld, Sergej
AU - Bocchini, Adriana
AU - Schmidt, Wolf Gero
ID - 22310
JF - Physical Review Materials
SN - 2475-9953
TI - Potassium titanyl phosphate Z- and Y-cut surfaces from density-functional theory
ER -
TY - JOUR
AU - Plaickner, Julian
AU - Speiser, Eugen
AU - Braun, Christian
AU - Schmidt, Wolf Gero
AU - Esser, Norbert
AU - Sanna, Simone
ID - 22008
JF - Physical Review B
SN - 2469-9950
TI - Surface localized phonon modes at the Si(553)-Au nanowire system
ER -