@inproceedings{45742,
  author       = {{Reimer, T. and Steinhoff, Lena and Leyer, M.}},
  booktitle    = {{2020 AMA Winter Academic Conference Proceedings, San Diego.}},
  location     = {{San Diego}},
  title        = {{{“Dear Stranger, This Looks Good on You”: The Effect of Ambiguous Interactive Virtual Presence on Store Loyalty in Offline Retailing}}},
  year         = {{2020}},
}

@article{38051,
  abstract     = {{<jats:p>The characterisation of loss in optical waveguides is essential in understanding the performance of these devices and their limitations. Whilst interferometric-based methods generally provide the best results for low-loss waveguides, they are almost exclusively used to provide characterization in cases where the waveguide is spatially single-mode. Here, we introduce a Fabry-Pérot-based scheme to estimate the losses of a nonlinear (birefringent or quasi-phase matched) waveguide at a wavelength where it is multi-mode. The method involves measuring the generated second harmonic power as the pump wavelength is scanned over the phase matching region. Furthermore, it is shown that this method allows one to infer the losses of different second harmonic spatial modes by scanning the pump field over the separated phase matching spectra. By fitting the measured phase matching spectra from different titanium indiffused lithium niobate waveguides to the model presented in this paper, it is shown that one can estimate the second harmonic losses of a single spatial-mode, at wavelengths where the waveguides are spatially multi-mode.</jats:p>}},
  author       = {{Santandrea, Matteo and Stefszky, Michael and Roeland, Ganaël and Silberhorn, Christine}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  number       = {{4}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Interferometric method for determining the losses of spatially multi-mode nonlinear waveguides based on second harmonic generation.}}},
  doi          = {{10.1364/oe.380788}},
  volume       = {{28}},
  year         = {{2020}},
}

@article{63781,
  abstract     = {{<jats:p> Triggering the energy-efficient behavior of agents in firms simultaneously decreases costs and mitigates CO<jats:sub>2</jats:sub> emissions. If firms use team tournaments to increase energy-efficient behavior and thus employee performance, they may face unintended consequences, like a bifurcation effect: Individuals drop out if they believe that they cannot win the contest. By contrast, high-performing employees may overexert themselves. Additionally, some individuals might be tempted to free-ride. In a field experiment with truck drivers, we analyze whether proportional sharing of the bonus within teams based on individual effort instead of egalitarian sharing reduces both bifurcation and free-riding during team tournaments. Our results reveal that (1) the team contest improves performance; (2) this increase in performance is overall slightly stronger under the proportional than under the egalitarian sharing rule, using ceteris paribus comparisons; and (3) the performance increase is mainly driven by the team member performing worse. </jats:p>}},
  author       = {{Hoffmann, Christin and Thommes, Kirsten}},
  issn         = {{1086-0266}},
  journal      = {{Organization &amp; Environment}},
  number       = {{2}},
  pages        = {{307--331}},
  publisher    = {{SAGE Publications}},
  title        = {{{Combining Egalitarian and Proportional Sharing Rules in Team Tournaments to Incentivize Energy-Efficient Behavior in a Principal-Agent Context}}},
  doi          = {{10.1177/1086026620945343}},
  volume       = {{35}},
  year         = {{2020}},
}

@phdthesis{63852,
  author       = {{Elbwart, Katharina}},
  publisher    = {{WVT}},
  title        = {{{Language regard in the Sunshine State. Floridian perspectives on language ideologies and linguistic variation}}},
  year         = {{2020}},
}

@article{64037,
  abstract     = {{Cross-linked thermosets are investigated by C-13 solid-state nuclear magnetic resonance (NMR) spectroscopy to determine their structure and to distinguish important epoxy resins and hardening agents. In addition to the epoxy resin and hardening agent, the identification of phosphorus-containing flame retardants is demonstrated by P-31 solid-state NMR. These studies provide a spectral database for routine use, which is finally applied to analyze commercial products containing an unknown multicomponent system.}},
  author       = {{Schäfer, T. and Buntkowsky, G. and Gutmann, Torsten}},
  journal      = {{ACS Omega}},
  number       = {{10}},
  pages        = {{5412–5420}},
  title        = {{{Solid-State Nuclear Magnetic Resonance as a Versatile Tool To Identify the Main Chemical Components of Epoxy-Based Thermosets}}},
  doi          = {{10.1021/acsomega.9b04482}},
  volume       = {{5}},
  year         = {{2020}},
}

@article{64004,
  abstract     = {{Abstract A facile approach is reported for the preparation of dirhodium coordination polymers [Rh2(L1)2]n (Rh2-L1) and [Rh2(L2)2]n (Rh2-L2; L1=N,N’-(pyromellitoyl)-bis-L-phenylalanine diacid anion, L2=bis-N,N’-(L-phenylalanyl) naphthalene-1,4,5,8-tetracarboxylate diimide) from chiral dicarboxylic acids by ligand exchange. Multiple techniques including FTIR, XPS, and 1H→13C CP MAS NMR spectroscopy reveal the formation of the coordination polymers. 19F MAS NMR was utilized to investigate the remaining TFA groups in the obtained coordination polymers, and demonstrated near-quantitative ligand exchange. DR-UV-vis and XPS confirm the oxidation state of the Rh center and that the Rh-single bond in the dirhodium node is maintained in the synthesis of Rh2-L1 and Rh2-L2. Both coordination polymers exhibit excellent catalytic performance in the asymmetric cyclopropanation reaction between styrene and diazooxindole. The catalysts can be easily recycled and reused without significant reduction in their catalytic efficiency.}},
  author       = {{Li, Zhenzhong and Rösler, Lorenz and Herr, Kevin and Brodrecht, Martin and Breitzke, Hergen and Hofmann, Kathrin and Limbach, Hans-Heinrich and Gutmann, Torsten and Buntkowsky, Gerd}},
  issn         = {{2192-6506}},
  journal      = {{ChemPlusChem}},
  number       = {{8}},
  pages        = {{1737–1746}},
  title        = {{{Dirhodium Coordination Polymers for Asymmetric Cyclopropanation of Diazooxindoles with Olefins: Synthesis and Spectroscopic Analysis}}},
  doi          = {{10.1002/cplu.202000421}},
  volume       = {{85}},
  year         = {{2020}},
}

@article{63985,
  abstract     = {{An experimental study is presented for the reverse micellar system of 15% by mass polydisperse hexaethylene glycol monodecylether (C10E6) in cyclohexane with varying amounts of added water up to 4% by mass. Measurements of viscosity and self-diffusion coefficients were taken as a function of temperature between 10 and 45 °C at varying sample water loads but fixed C10E6/cyclohexane composition. The results were used to inspect the validity of the Stokes–Einstein equation for this system. Unreasonably small reverse average micelle radii and aggregation numbers were obtained with the Stokes–Einstein equation, but reasonable values for these quantities were obtained using the ratio of surfactant-to-cyclohexane self-diffusion coefficients. While bulk viscosity increased with increasing water load, a concurrent expected decrease of self-diffusion coefficient was only observed for the surfactant and water but not for cyclohexane, which showed independence of water load. Moreover, a spread of self-diffusion coefficients was observed for the protons associated with the ethylene oxide repeat unit in samples with polydisperse C10E6 but not in a sample with monodisperse C10E6. These findings were interpreted by the presence of reverse micelle to reverse micelle hopping motions that with higher water load become increasingly selective toward C10E6 molecules with short ethylene oxide repeat units, while those with long ethylene oxide repeat units remain trapped within the reverse micelle because of the increased hydrogen bonding interactions with the water inside the growing core of the reverse micelle. Despite the observed breakdown of the Stokes–Einstein equation, the temperature dependence of the viscosities and self-diffusion coefficients was found to follow Arrhenius behavior over the investigated range of temperatures.}},
  author       = {{Hoffmann, Markus M. and Too, Matthew D. and Vogel, Michael and Gutmann, Torsten and Buntkowsky, Gerd}},
  journal      = {{Journal of Physical Chemistry B}},
  number       = {{41}},
  pages        = {{9115–9125}},
  publisher    = {{American Chemical Society}},
  title        = {{{Breakdown of the Stokes–Einstein Equation for Solutions of Water in Oil Reverse Micelles}}},
  doi          = {{10.1021/acs.jpcb.0c06124}},
  volume       = {{124}},
  year         = {{2020}},
}

@article{63976,
  abstract     = {{Mesoporous silica materials (SBA-15) with surfaces modified with aminopropyltriethoxysilane (APTES) of two different surface coverages were synthesized, and their structural pore characteristics were analyzed. These two mesoporous silica materials were impregnated with various solutions of radicals in a nonionic surfactant solvent. Differential scanning calorimetry (DSC) analysis of the impregnated mesoporous silica materials confirmed that the surfactant solutions were confined into the pores. Dynamic nuclear polarization (DNP)-enhanced solid-state 13C magic-angle spinning (MAS) NMR spectra recorded for these impregnated mesoporous silica materials showed the presence of superimposed spectra from direct and indirect channel polarization transfer processes not only for the confined surfactant solvent but also for the APTES surface modification. The observation of the indirect channel resonances implies that the surfactant solvents as well as the APTES exhibit molecular motions with correlation times on the order of or faster than the inverse Larmor frequency. Such motions are unexpected at the experimental temperature conditions of ∼120 K in particular for the immobilized APTES. Spectral line widths and intensities of the observed 13C MAS NMR spectra were sensitive to the specific combination of the radical, surfactant solvent, and APTES surface coverage. One particular combination showed identical widths and intensities for the direct and the oppositely phased indirect channel resonances, resulting in a blank spectrum. The differences in line widths and intensities are discussed with respect to the structural organization of the polarizing agent and surfactant within the pores and the complex interplay of intermolecular interactions between these constituents.}},
  author       = {{Hoffmann, Markus M. and Bothe, Sarah and Brodrecht, Martin and Klimavicius, Vytautas and Haro-Mares, Nadia B. and Gutmann, Torsten and Buntkowsky, Gerd}},
  issn         = {{1932-7447}},
  journal      = {{Journal of Physical Chemistry C}},
  number       = {{9}},
  pages        = {{5145–5156}},
  publisher    = {{American Chemical Society}},
  title        = {{{Direct and Indirect Dynamic Nuclear Polarization Transfer Observed in Mesoporous Materials Impregnated with Nonionic Surfactant Solutions of Polar Polarizing Agents}}},
  doi          = {{10.1021/acs.jpcc.9b10504}},
  volume       = {{124}},
  year         = {{2020}},
}

@article{63954,
  abstract     = {{We propose a mild and versatile synthesis protocol based on N-hydroxysuccinimide-activated esters for the introduction of new functionalities to cellulose, using as starting point established protocols for the tosylation of cellulose and its subsequent reaction with a diamine linker. As a proof of concept, we describe the functionalization of microcrystalline cellulose with a N-hydroxysuccinimide-activated ester of benzophenone, a photoreactive functional group. Irradiation of the final product with UV light yields a self-standing polymer film and is expected to result in cross-linking among cellulose chains. To monitor structural changes at the molecular level, each functionalization step is characterized by a multinuclear solid-state NMR approach. DNP-enhanced 15N CP MAS NMR experiments reveal the formation of the amide bond to the photoreactive linker and deliver further information about the binding situation of nitrogen-containing groups in these materials. The flexible synthesis protocol described here can be easily extended to a broad range of other functionalities of interest, both for the cellulose and macromolecular research.}},
  author       = {{Groszewicz, Pedro B. and Mendes, Pedro and Kumari, Bharti and Lins, Jonas and Biesalski, Markus and Gutmann, Torsten and Buntkowsky, Gerd}},
  issn         = {{0969-0239}},
  journal      = {{Cellulose}},
  pages        = {{1239–1254}},
  title        = {{{N-Hydroxysuccinimide-activated esters as a functionalization agent for amino cellulose: synthesis and solid-state NMR characterization}}},
  doi          = {{10.1007/s10570-019-02864-5}},
  volume       = {{27}},
  year         = {{2020}},
}

@article{63953,
  abstract     = {{Most porous polymers are notoriously hard to characterize due to their amorphous and completely insoluble nature. On the other hand, they are an interesting class of materials for sorption, catalytic, and electrode applications, thus they warrant in-depth studies. In this contribution, we elaborate on the possibilities that dynamic nuclear polarization offers towards the investigation of the structure of porous polymers. We discuss the advantages and disadvantages of this technique in the investigation of model polymers.}},
  author       = {{Grätz, Sven and Olivera Junior, Marcos and Gutmann, Torsten and Borchardt, Lars}},
  journal      = {{Physical Chemistry Chemical Physics}},
  number       = {{40}},
  pages        = {{23307–23314}},
  publisher    = {{The Royal Society of Chemistry}},
  title        = {{{A comprehensive approach for the characterization of porous polymers using 13C and 15N dynamic nuclear polarization NMR spectroscopy}}},
  doi          = {{10.1039/D0CP04010J}},
  volume       = {{22}},
  year         = {{2020}},
}

@article{64276,
  author       = {{Krötz, Bernhard and Kuit, Job J. and Opdam, Eric M. and Schlichtkrull, Henrik}},
  issn         = {{1016-443X}},
  journal      = {{Geometric and Functional Analysis}},
  number       = {{3}},
  pages        = {{804--857}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{The Infinitesimal Characters of Discrete Series for Real Spherical Spaces}}},
  doi          = {{10.1007/s00039-020-00540-6}},
  volume       = {{30}},
  year         = {{2020}},
}

@article{59684,
  abstract     = {{<jats:p>In this paper, we present a confocal laser scanning holographic microscope for the investigation of buried structures. The multimodal system combines high diffraction limited resolution and high signal-to-noise-ratio with the ability of phase acquisition. The amplitude and phase imaging capabilities of the system are shown on a test target. For the investigation of buried integrated semiconductor structures, we expand our system with an optical beam induced current modality that provides additional structure-sensitive contrast. We demonstrate the performance of the multimodal system by imaging the buried structures of a microcontroller through the silicon backside of its housing in reflection geometry.</jats:p>}},
  author       = {{Schnitzler, Lena and Neutsch, Krisztian and Schellenberg, Falk and Hofmann, Martin R. and Gerhardt, Nils Christopher}},
  issn         = {{1559-128X}},
  journal      = {{Applied Optics}},
  number       = {{4}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Confocal laser scanning holographic microscopy of buried structures}}},
  doi          = {{10.1364/ao.403687}},
  volume       = {{60}},
  year         = {{2020}},
}

@article{57401,
  author       = {{Pfeifer, Christian and Janssen, Simon and Yang, Philip and Backes-Gellner, Uschi}},
  issn         = {{1877-6345}},
  journal      = {{Empirical Research in Vocational Education and Training}},
  number       = {{2}},
  pages        = {{131--147}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Training participation of a firm’s aging workforce}}},
  doi          = {{10.1007/bf03546513}},
  volume       = {{4}},
  year         = {{2020}},
}

@article{33592,
  author       = {{Rezat, Sara}},
  journal      = {{Praxis Deutsch 281}},
  pages        = {{41--43}},
  title        = {{{Wie neutral sind Berichte? Modalisierungsprozeduren in Ereignisberichten}}},
  year         = {{2020}},
}

@article{55524,
  author       = {{Burchardt, Adam and Raissi, Zahra}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  number       = {{2}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Stochastic local operations with classical communication of absolutely maximally entangled states}}},
  doi          = {{10.1103/physreva.102.022413}},
  volume       = {{102}},
  year         = {{2020}},
}

@article{55523,
  author       = {{Raissi, Zahra}},
  issn         = {{2169-3536}},
  journal      = {{IEEE Access}},
  pages        = {{222439--222448}},
  publisher    = {{Institute of Electrical and Electronics Engineers (IEEE)}},
  title        = {{{Modifying Method of Constructing Quantum Codes From Highly Entangled States}}},
  doi          = {{10.1109/access.2020.3043401}},
  volume       = {{8}},
  year         = {{2020}},
}

@article{55538,
  author       = {{Burchardt, Adam and Raissi, Zahra}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  number       = {{2}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Stochastic local operations with classical communication of absolutely maximally entangled states}}},
  doi          = {{10.1103/physreva.102.022413}},
  volume       = {{102}},
  year         = {{2020}},
}

@inproceedings{39405,
  author       = {{Petrov, Dmitry and Hilleringmann, Ulrich}},
  booktitle    = {{2020 IEEE SENSORS}},
  publisher    = {{IEEE}},
  title        = {{{Water-based primary cell for powering of wireless sensors}}},
  doi          = {{10.1109/sensors47125.2020.9278891}},
  year         = {{2020}},
}

@inproceedings{51848,
  author       = {{Poeplau, M. and Ester, S. and Henning, B. and Wagner, T.}},
  booktitle    = {{Tagungsband}},
  publisher    = {{AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf}},
  title        = {{{5.2.3 Zinkoxid als photostabiler Luminophor zur optischen Sauerstoffdetektion}}},
  doi          = {{10.5162/sensoren2019/5.2.3}},
  year         = {{2020}},
}

@proceedings{19976,
  abstract     = {{The aim to reduce pollutant emission has led to a trend towards lightweight construction in car body development during the last years. As a consequence of the resulting need for multi-material design, mechanical joining technologies become increasingly important. Mechanical joining allows for the combination of dissimilar materials, while thermic joining techniques reach their limits. Self-piercing riveting enables the joining of dissimilar materials by using semi-tubular rivets as mechanical fasteners. The rivet production, however, is costly and time-consuming, as the rivets generally have to be hardened, tempered and coated after forming, in order to achieve an adequate strength and corrosion resistance. A promising approach to improve the efficiency of the rivet manufacturing is the use of high-strength high nitrogen steel as rivet material because these additional process steps would not be necessary anymore. As a result of the comparatively high nitrogen content, such steels have various beneficial properties like higher strength, good ductility and improved corrosion resistance. By cold bulk forming of high nitrogen steels high-strength parts can be manufactured due to the strengthening which is caused by the high strain hardening. However, high tool loads thereby have to be expected and are a major challenge during the production process. Consequently, there is a need for appropriate forming strategies. This paper presents key aspects concerning the process design for the manufacturing of semi-tubular self-piercing rivets made of high-strength steel. The aim is to produce the rivets in several forming stages without intermediate heat treatment between the single stages. Due to the high strain hardening of the material, a two stage forming concept will be investigated. Cup-backward extrusion is chosen as the first process step in order to form the rivet shank without forming the rivet foot. Thus, the strain hardening effects in the area of the rivet foot are minimized and the tool loads during the following process step can be reduced. During the second and final forming stage the detailed geometry of the rivet foot and the rivet head is formed. In this context, the effect of different variations, for example concerning the final geometry of the rivet foot, on the tool load is investigated using multistage numerical analysis. Furthermore, the influence of the process temperature on occurring stresses is analysed. Based on the results of the investigations, an adequate forming strategy and a tool concept for the manufacturing of semi-tubular self-piercing rivets made of high-strength steel are presented.}},
  editor       = {{Kuball, Clara-Maria and Uhe, Benedikt and Meschut, Gerson and Merklein, Marion}},
  keywords     = {{high nitrogen steel, self-piercing riveting, joining by forming, bulk forming, tool design}},
  pages        = {{280--285}},
  title        = {{{Process design for the forming of semi-tubular self-piercing rivets made of high nitrogen steel}}},
  doi          = {{10.1016/j.promfg.2020.08.052}},
  volume       = {{50}},
  year         = {{2020}},
}