@article{34917,
abstract = {{We relate proper isometry classes of maximal lattices in a totally definite quaternary quadratic space (V,q) with trivial discriminant to certain equivalence classes of ideals in the quaternion algebra representing the Clifford invariant of (V,q). This yields a good algorithm to enumerate a system of representatives of proper isometry classes of lattices in genera of maximal lattices in (V,q).}},
author = {{Kirschmer, Markus and Nebe, Gabriele}},
issn = {{1793-0421}},
journal = {{International Journal of Number Theory}},
keywords = {{Algebra and Number Theory}},
number = {{02}},
pages = {{309--325}},
publisher = {{World Scientific Pub Co Pte Lt}},
title = {{{Quaternary quadratic lattices over number fields}}},
doi = {{10.1142/s1793042119500131}},
volume = {{15}},
year = {{2019}},
}
@article{34916,
abstract = {{We describe the powers of irreducible polynomials occurring as characteristic polynomials of automorphisms of even unimodular lattices over number fields. This generalizes results of Gross & McMullen and Bayer-Fluckiger & Taelman.}},
author = {{Kirschmer, Markus}},
issn = {{0022-314X}},
journal = {{Journal of Number Theory}},
keywords = {{Algebra and Number Theory}},
pages = {{121--134}},
publisher = {{Elsevier BV}},
title = {{{Automorphisms of even unimodular lattices over number fields}}},
doi = {{10.1016/j.jnt.2018.08.004}},
volume = {{197}},
year = {{2019}},
}
@techreport{47083,
author = {{Habla, Wolfgang and Huwe, Vera and Kesternich, Martin}},
issn = {{0043-6275}},
keywords = {{Business, Management and Accounting (miscellaneous)}},
pages = {{330--334}},
publisher = {{Wirtschaftsdienst 99(5), 330-334}},
title = {{{Tempolimits und Grenzwerte: für eine evidenzbasierte verkehrspolitische Debatte}}},
doi = {{10.1007/s10273-019-2452-6}},
volume = {{99(5)}},
year = {{2019}},
}
@article{51323,
abstract = {{Sebastian Zicks erziehungswissenschaftliche Kritik des Mobilitätsimperativs ist Ausgangspunkt unseres Beitrags. Wir greifen diese Kritik auf, indem wir sie in zweifacher Hinsicht ergänzen: Erstens um einen Fokus auf soziale Mobilität, welche sich in Mobilitätsnarrativen mit räumlicher Mobilität als verwoben zeigt. Zweitens um die Perspektive auf Mobilität als Rückkehr, die wir von einer Perspektive auf Mobilität als Fortbewegung abgrenzen. Die Rückwärtsbewegung ist für uns eng an (Selbst-)Reflexionen und transformatorische Bildungsprozesse gebunden, wie sie in Didier Eribons autosozioanalytischem Vorhaben einer Rückkehr zu erkennen sind. Unsere Ausführungen münden erstens in einer Kritik am Imperativ des Bildungsaufstiegs, in dem mehr Bildung scheinbar immer mit individuellen und kollektiven Fortschritten einhergeht. Zweitens wenden wir die von uns herausgearbeitete Kritik reflexiv auf die Erziehungswissenschaft. Sie ist dann eine Verunsicherungswissenschaft, für die die Rückkehr, und damit das Hinterfragen eigener Selbstverständlichkeiten, konstitutiv ist.}},
author = {{Haker, Christoph and Otterspeer, Lukas}},
issn = {{2567-5974}},
journal = {{Debatte. Beiträge zur Erwachsenenbildung}},
keywords = {{Rehabilitation, Physical Therapy, Sports Therapy and Rehabilitation, General Medicine}},
number = {{2-2019}},
pages = {{161--176}},
publisher = {{Verlag Barbara Budrich GmbH}},
title = {{{Erziehungswissenschaft als Verunsicherungswissenschaft. Nicht nur eine Kritik des Mobilitätsimperativs}}},
doi = {{10.3224/debatte.v2i2.04}},
volume = {{2}},
year = {{2019}},
}
@article{51320,
abstract = {{Die Systemtheorie und die Kritische Theorie sind Schulen, die Theoretikerinnen seit langem ein Zuhause bieten. In der Zeit ihres Bestehens kam es immer wieder zu Treffpunkten und Theoriekollisionen dieser beiden Traditionen des Denkens der Gesellschaft. Durch die hier entwickelte Metareflexion wird es möglich, zu analysieren, wie diese Theorietraditionen verbunden werden. Da sich die aktuelle Diskussion auf die Perspektive der Systemtheorie beschränkt, ist es notwendig, die Verbindung auch aus der Perspektive Kritischer Theorie zu debattieren. Denn erst die Unterscheidung der heute immer mehr ins Gespräch kommenden Kritischen Systemtheorie von der kaum diskutierten Kritischen Theorie sozialer Systeme macht es möglich, die volle Produktivität der Theoriekollisionen zu erkennen. Wir konzipieren unsere Metareflexion damit als eine Intervention im Sinne einer soziologischen Selbstkritik. Sie richtet sich gegen die Gefahr des theoretischen Dogmatismus und plädiert für die Öffnung der Kontingenz des eigenen Denkens der Gesellschaft.
}},
author = {{Alvear, Rafael and Haker, Christoph}},
issn = {{0340-0425}},
journal = {{Leviathan}},
keywords = {{Political Science and International Relations, Linguistics and Language, Sociology and Political Science, Language and Linguistics}},
number = {{4}},
pages = {{498--513}},
publisher = {{Nomos Verlag}},
title = {{{Kritische Systemtheorie und Kritische Theorie sozialer Systeme. Ein Plädoyer für eine fruchtbare Unterscheidung}}},
doi = {{10.5771/0340-0425-2019-4-498}},
volume = {{47}},
year = {{2019}},
}
@article{47582,
abstract = {{AbstractModeling of heat and mass transfer in fixed‐bed reactors for heterogeneously catalyzed gas phase reactions is possible using different methods. Homogeneous and heterogeneous continuum models as well as particle resolved modeling of fixed‐bed reactors show high potential for application. Considering those approaches, advantages and disadvantages as well as underlying assumptions and boundary conditions are discussed. Additionally, methods for experimental validation are presented and discussed focusing on the two‐dimensional homogeneous models.}},
author = {{Stegehake, Carolin and Riese, Julia and Grünewald, Marcus}},
issn = {{2196-9744}},
journal = {{ChemBioEng Reviews}},
keywords = {{Industrial and Manufacturing Engineering, Filtration and Separation, Process Chemistry and Technology, Biochemistry, Chemical Engineering (miscellaneous), Bioengineering}},
number = {{2}},
pages = {{28--44}},
publisher = {{Wiley}},
title = {{{Modeling and Validating Fixed‐Bed Reactors: A State‐of‐the‐Art Review}}},
doi = {{10.1002/cben.201900002}},
volume = {{6}},
year = {{2019}},
}
@article{42674,
author = {{Klowait, Nils}},
issn = {{1369-118X}},
journal = {{Information, Communication & Society}},
keywords = {{Library and Information Sciences, Communication}},
number = {{5}},
pages = {{605--621}},
publisher = {{Informa UK Limited}},
title = {{{Interactionism in the age of ubiquitous telecommunication}}},
doi = {{10.1080/1369118x.2019.1566487}},
volume = {{22}},
year = {{2019}},
}
@article{53274,
abstract = {{This paper studies the performance of improper Gaussian signaling (IGS) over a 2-user Rayleigh single-input single-output (SISO) interference channel, treating interference as noise. We assume that the receivers have perfect channel state information (CSI), while the transmitters have access to only statistical CSI. Under these assumptions, we consider a signaling scheme, which we refer to as proper/improper Gaussian signaling or PGS/IGS, where at most one user may employ IGS. For the Rayleigh fading channel model, we characterize the statistical distribution of the signal-to-interference-plus-noise ratio at each receiver and derive closed-form expressions for the ergodic rates. By adapting the powers, we characterize the Pareto boundary of the ergodic rate region for the 2-user fading IC. The ergodic transmission rates can be attained using fixed-rate codebooks and no optimization is involved. Our results show that, in the moderate and strong interference regimes, the proposed PGS/IGS scheme improves the performance with respect to the PGS scheme. Additionally, we numerically compute the ergodic rate region of the full IGS scheme when both users can employ IGS and their transmission parameters are optimized by an exhaustive search. Our results suggest that most of the Pareto optimal points for the 2-user fading IC channel are attained when either both users transmit PGS or when one transmits PGS and the other transmits maximally improper Gaussian signals and time sharing is allowed.}},
author = {{Soleymani, Mohammad and Santamaria, Ignacio and Lameiro, Christian and Schreier, Peter J.}},
issn = {{1099-4300}},
journal = {{Entropy}},
keywords = {{General Physics and Astronomy}},
number = {{10}},
publisher = {{MDPI AG}},
title = {{{Ergodic Rate for Fading Interference Channels with Proper and Improper Gaussian Signaling}}},
doi = {{10.3390/e21100922}},
volume = {{21}},
year = {{2019}},
}
@article{53276,
author = {{Soleymani, Mohammad and Lameiro, Christian and Santamaria, Ignacio and Schreier, Peter J.}},
issn = {{0090-6778}},
journal = {{IEEE Transactions on Communications}},
keywords = {{Electrical and Electronic Engineering}},
number = {{7}},
pages = {{4709--4723}},
publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}},
title = {{{Robust Improper Signaling for Two-User SISO Interference Channels}}},
doi = {{10.1109/tcomm.2019.2910549}},
volume = {{67}},
year = {{2019}},
}
@article{53271,
author = {{Soleymani, Mohammad and Lameiro, Christian and Santamaria, Ignacio and Schreier, Peter J.}},
issn = {{0090-6778}},
journal = {{IEEE Transactions on Communications}},
keywords = {{Electrical and Electronic Engineering}},
number = {{12}},
pages = {{8624--8638}},
publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}},
title = {{{Improper Signaling for SISO Two-User Interference Channels With Additive Asymmetric Hardware Distortion}}},
doi = {{10.1109/tcomm.2019.2939310}},
volume = {{67}},
year = {{2019}},
}
@techreport{15392,
abstract = {{Employing a sample of 492 merger and acquisition (M&A) announcements from
284 acquirers across North America and Europe between 2005 and 2018, this study
analyzes the impact of M&A announcements on an acquirers abnormal CDS spread
changes. We nd that spreads from CDS which are written on acquirers increase
by 310 bps during a symmetric ve-day event window suggesting that investors
expect an increase in the acquirers credit risk exposure due to M&As. Next to
this baseline nding, we conduct a large variety of sensitivity analyses to gain more
insight into the driving factors of the rising risk perception of CDS investors due to
M&A announcements.}},
author = {{Uhde, André and Hippert, Benjamin}},
keywords = {{credit default swaps, risk perception of CDS investors, mergers and acquisitions, event study}},
title = {{{The relationship between announcements of complete mergers and acquisitions and acquirers' abnormal CDS-Spread changes}}},
year = {{2019}},
}
@article{32486,
abstract = {{Understanding the chemistry of precursor solutions for spray-flame synthesis is a key step to developing inexpensive and large scale applications for tailored nanoparticles.
}},
author = {{Stodt, Malte F. B. and Gonchikzhapov, Munko and Kasper, Tina and Fritsching, Udo and Kiefer, Johannes}},
issn = {{1463-9076}},
journal = {{Physical Chemistry Chemical Physics}},
keywords = {{Physical and Theoretical Chemistry, General Physics and Astronomy}},
number = {{44}},
pages = {{24793--24801}},
publisher = {{Royal Society of Chemistry (RSC)}},
title = {{{Chemistry of iron nitrate-based precursor solutions for spray-flame synthesis}}},
doi = {{10.1039/c9cp05007h}},
volume = {{21}},
year = {{2019}},
}
@article{37225,
abstract = {{Abstract. This study investigates factors influencing employeesʼ intention to stay. Therefore, we developed and analyzed a retention model relating to the voluntary turnover model ( Allen et al., 2010 ). We assume that the decision processes for retention and turnover might be similar. Differences can be found in the initiating factors (the drivers for leaving and staying). We combine empirically evident retention drivers, which are weighted regarding their implementation in the organization, with process variables from the turnover model. The model is tested with a sample of 881 German employees using structural equation modeling. Results show a significant indirect effect of the retention drivers on the intention to stay. The influence is mediated by the key attitudes job satisfaction and affective commitment. A psychological contract breach influences the relationship between job satisfaction and intention to stay, but not between affective commitment and intention to stay. We integrated research from Human Resource Management (HRM) into the framework of voluntary turnover.}},
author = {{Bender, Elena and Schaper, Niclas and Schürmann, Mirko}},
issn = {{0932-4089}},
journal = {{Zeitschrift für Arbeits- und Organisationspsychologie}},
keywords = {{Organizational Behavior and Human Resource Management, Applied Psychology}},
number = {{4}},
pages = {{238--250}},
publisher = {{Hogrefe Publishing Group}},
title = {{{Factors Driving Employeesʼ Intention to Stay}}},
doi = {{10.1026/0932-4089/a000313}},
volume = {{63}},
year = {{2019}},
}
@article{35872,
author = {{Zhang, Bingru and Schmidtke, Jürgen and Kitzerow, Heinz-Siegfried}},
issn = {{2195-1071}},
journal = {{Advanced Optical Materials}},
keywords = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
number = {{8}},
publisher = {{Wiley}},
title = {{{Fabrication of Lyotropic Alignment Layers for Thermotropic Liquid Crystals Facilitated by a Polymer Template}}},
doi = {{10.1002/adom.201801766}},
volume = {{7}},
year = {{2019}},
}
@article{39649,
abstract = {{Metal-semiconductor and junction n-channel field-effect transistors (MESFETs and JFETs) have been fabricated on glass substrates using room temperature deposited amorphous zinc-tin oxide (ZTO) channel layers. Characteristics of transistors and inverter circuits are compared. Best FET devices exhibit ON-to- OFF current ratios over eight orders of magnitude, subthreshold swings as low as 250 mV/dec and field-effect mobilities of 5 cm 2 /Vs. Furthermore, all devices show long-term stability over a period of more than 200 days. Inverters fabricated using either MESFETs or JFETs exhibit remarkable peak gain magnitude values of 350 and voltage uncertainty levels as low as 260 mV for an operating voltage of 5 V. A Schottky diode FET logic (SDFL) approach is applied to shift the switching voltage which is a requirement for cascading of inverters for realization of ring oscillators.}},
author = {{Lahr, Oliver and Zhang, Zhipeng and Grotjahn, Frank and Schlupp, Peter and Vogt, Sofie and von Wenckstern, Holger and Thiede, Andreas and Grundmann, Marius}},
issn = {{0018-9383}},
journal = {{IEEE Transactions on Electron Devices}},
keywords = {{Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials}},
number = {{8}},
pages = {{3376--3381}},
publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}},
title = {{{Full-Swing, High-Gain Inverters Based on ZnSnO JFETs and MESFETs}}},
doi = {{10.1109/ted.2019.2922696}},
volume = {{66}},
year = {{2019}},
}
@article{41031,
abstract = {{The design and performance of the high-resolution wavelength-dispersive multi-crystal von Hamos-type spectrometer at PETRA III beamline P64 are described. Extended analyzer crystal collection available at the beamline allows coverage of a broad energy range from 5 keV to 20 keV with an energy resolution of 0.35–1 eV. Particular attention was paid to enabling two-color measurements by a combination of two types of analyzer crystals and two two-dimensional detectors. The performance of the spectrometer is demonstrated by elastic-line and emission-line measurements on various compounds.}},
author = {{Kalinko, Aleksandr and Caliebe, Wolfgang A. and Schoch, Roland and Bauer, Matthias}},
issn = {{1600-5775}},
journal = {{Journal of Synchrotron Radiation}},
keywords = {{Instrumentation, Nuclear and High Energy Physics, Radiation}},
number = {{1}},
pages = {{31--36}},
publisher = {{International Union of Crystallography (IUCr)}},
title = {{{A von Hamos-type hard X-ray spectrometer at the PETRA III beamline P64}}},
doi = {{10.1107/s1600577519013638}},
volume = {{27}},
year = {{2019}},
}
@article{41050,
abstract = {{Gold(ii) species catalyse the cyclisation of N(2-propyn-1-yl)benzamide to 2-phenyl-5-vinylidene-2-oxazoline without halide abstraction while the neutral gold(i) complex is inactive indicating a gold(ii/i) redox-switch.
}},
author = {{Veit, Philipp and Volkert, Carla and Förster, Christoph and Ksenofontov, Vadim and Schlicher, Steffen and Bauer, Matthias and Heinze, Katja}},
issn = {{1359-7345}},
journal = {{Chemical Communications}},
keywords = {{Materials Chemistry, Metals and Alloys, Surfaces, Coatings and Films, General Chemistry, Ceramics and Composites, Electronic, Optical and Magnetic Materials, Catalysis}},
number = {{32}},
pages = {{4615--4618}},
publisher = {{Royal Society of Chemistry (RSC)}},
title = {{{Gold(ii) in redox-switchable gold(i) catalysis}}},
doi = {{10.1039/c9cc00283a}},
volume = {{55}},
year = {{2019}},
}
@article{41294,
author = {{Steinhoff, Lena and Arli, Denni and Weaven, Scott and Kozlenkova, Irina V.}},
issn = {{0092-0703}},
journal = {{Journal of the Academy of Marketing Science}},
keywords = {{Marketing, Economics and Econometrics, Business and International Management}},
number = {{3}},
pages = {{369--393}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Online relationship marketing}}},
doi = {{10.1007/s11747-018-0621-6}},
volume = {{47}},
year = {{2019}},
}
@article{40973,
author = {{Tophinke, Doris and Topalovic, Elvira and Rohlfing, Katharina J.}},
issn = {{0418-9426}},
journal = {{Mitteilungen des Deutschen Germanistenverbandes}},
keywords = {{General Earth and Planetary Sciences, General Environmental Science}},
number = {{4}},
pages = {{313--319}},
publisher = {{Brill Deutschland GmbH}},
title = {{{Sprachstrukturelle Modelle. Linguistische, spracherwerbsorientierte und didaktische Zugänge}}},
doi = {{10.14220/mdge.2019.66.4.313}},
volume = {{66}},
year = {{2019}},
}
@article{40581,
author = {{Lopez Salas, Nieves and Vicent-Luna, José Manuel and Imberti, Silvia and Posada, Elena and Roldán, María Jesús and Anta, Juan A. and Balestra, Salvador R. G. and Madero Castro, Rafael M. and Calero, Sofia and Jiménez-Riobóo, Rafael J. and Gutiérrez, María Concepción and Ferrer, María Luisa and del Monte, Francisco}},
issn = {{2168-0485}},
journal = {{ACS Sustainable Chemistry & Engineering}},
keywords = {{Renewable Energy, Sustainability and the Environment, General Chemical Engineering, Environmental Chemistry, General Chemistry}},
number = {{21}},
pages = {{17565--17573}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Looking at the “Water-in-Deep-Eutectic-Solvent” System: A Dilution Range for High Performance Eutectics}}},
doi = {{10.1021/acssuschemeng.9b05096}},
volume = {{7}},
year = {{2019}},
}