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The 20 most recently published documents

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Motivation to share - a qualitative study exploring consumers' motives to participate in collaborative apparel consumption (2019)
Walter, Clara ; Weber, Tina ; Köksal, Deniz
Collaborative apparel consumption is proposed as more sustainable alternative to conventional consumption. The purpose of this study is the exploration of consumers’ motives to participate in collaborative apparel consumption. Findings suggest that consumers’ intention to participate in collaborative apparel consumption is mainly influenced by financial benefits, convenience and sustainability awareness.
Creating digital offerings customers will buy : find the sweet spot between what technologies can deliver and what your customers need (2019)
Ross, Jeanne ; Beath, Cynthia ; Mocker, Martin
Successful digital offerings are created at the intersection of what technologies can deliver and what customers want and will pay for. That point of intersection, however, has proved to be elusive. To find it, companies must experiment repeatedly, cocreate with customers, and assemble cross-functional development teams - and the insights gleaned along the way must be shared internally. In this article, we discuss how several of the nearly 200 companies we've studied have built and exercised these capabilities. We also take a close look at how one company, Schneider Electric, is using them to acquire and share customer insights.
Attraktiver Arbeitgeber für die Generation Y auch ohne „schicke“ Produkte (2019)
Kneip, Petra ; O‘Mahony, Niamh ; Schütz, Tobias
Forschungsfrage: Wie können sich Unternehmen als attraktive Arbeitgeber positionieren, wenn sie bei jungen Bewerbern der Generation Y kaum bekannt sind und ihre Produkte als wenig attraktiv wahrgenommen werden? Methodik: Szenariostudie mit Daten aus einer schriftlichen Befragung Praktische Implikationen: Solche Unternehmen sollten auf die Nutzenversprechen einer Employer Brand setzen, um sich als attraktiver Arbeitgeber für diese Zielgruppe zu positionieren. Voraussetzung dafür ist eine auf die Zielgruppe abgestimmte und präzise Kommunikation über die relevanten Attraktivitätsmerkmale.
Optimal policy under uncertainty and rational inattention (2019)
Herzog, Bodo
This paper generalizes the theory of policy uncertainty with the new literature on rational inattention. First, the model demonstrates that inattention is dependent on the signal variance and the policy parameter. Second, I discover a novel trade-off showing that a policy instrument mitigates attention. Third, the policy instrument is non-linear and reciprocal to both the size and variance of the signal. The unifying theory creates new implications to economic theory and public policy alike.
Auger electron spectroscopy and UV–Vis spectroscopy in combination with multivariate curve resolution analysis to determine the Cu2O/CuO ratios in oxide layers on technical copper surfaces (2019)
Stiedl, Jan ; Green, Simon ; Chassé, Thomas ; Rebner, Karsten
We report an investigation into the distribution of copper oxidation states in oxide films formed on the surfaces of technical copper. The oxide films were grown by thermal annealing at ambient conditions and studied using Auger depth profiling and UV–Vis spectroscopy. Both Auger and UV–Vis data were evaluated applying multivariate curve resolution (MCR). Both experimental techniques revealed that the growth of Cu2O dominates the initial ca. 40 nm of oxide films grown at 175 °C, while further oxide growth is dominated by CuO formation. The largely coincident results from both experimental approaches demonstrates the huge benefit of the application of UV–Vis spectroscopy in combination with MCR analysis, which provides access to information on chemical state distributions without the need for destructive sample analysis. Both approaches are discussed in detail.
Homogeneous, monodispersed furan-melamine particles performing reversible binding and forming networks (2019)
Urdl, Katharina ; Weiss, Stephanie ; Brodbeck, Björn ; Kandelbauer, Andreas ; Zikulnig-Rusch, Edith ; Müller, Uwe ; Kern, Wolfgang
Homogeneous and monodispersed furan functionalised melamine-formaldehyde particles were produced. As a precursor, 2-chloro-1,3,5-triazine-2,4-diamine (Mel) was selectively substituted with 2-aminomethyl furan (Fu) units in a convenient one step reaction. The pure reaction product Fu-Mel, which was used without further purification, was reacted with formaldehyde by conventional sol-gel condensation in aqueous medium to yield chemically homogenous, spherically shaped and monodispersed particles. The particles were analysed using ATR-FT-IR, Raman, 1H and 13C NMR spectroscopy, TGA, SEM and DSC measurements. The reactivity of the furan groups located at the particle surface was studied by performing a thermoreversible Diels-Alder cycloaddition reaction with bis-maleimide coupling agents. The formed networks showed thermoreversible behaviour, which was characterised by dynamic IR and DSC measurements.
Assortment policy in fashion retail - can a setup-specific assortment policy be observed on the German market? An empirical study of vertical managed store, outlet and online formats (2019)
Ladmann, Nicole ; Bug, Peter
Today many vertical retailers are operating different sales channels at the same time and are respon-sible for the range of products in all sales channels. The purpose of this paper is to examine whether for vertical fashion retailers a format-specific assortment policy can be observed on the German mar-ket. To investigate this topic in addition to secondary data of a literature research, quantitative prima-ry data was collected through a structured observation by conducting store checks. The combination provides insights into the research topic, allows to build hypotheses and to get a current and specific answer on the research topic. The study revealed all vertical retailers exploit the advantage of unlim-ited capacity of the online shop by offering in this channel mainly the broadest and deepest assort-ment. Within the retail store the vertical retailers focus on offering full-price goods for the current season in full size sets. Compared to the online shop here are less styles sophisticated presented and adjusted on the sales floor. For the outlet channel all brands showed a higher density of products and at least a price reduction of 30 per cent. The present paper is limited by time, depth and language of secondary data collection. As the study only conducted quantitative data within limited observations additional visual data over a longer period is necessary.
Strategy orientation in the fashion industry: short- or long-term? (2019)
Schwarz, Jan Oliver
The purpose of this paper is to assess if the strategy development of the fashion industry is oriented to the long or short term. Following the theory of dynamic capabilities, this paper argues that a long term strategic orientation can be observed in corporate foresight activities. A multi methodological research approach is chosen to answer the research question. The findings suggest that the fashion industry is lagging behind other industries in terms of future orientation and therefore long-term strategy development, even though the challenges in the business environment are not perceived as less relevant.
Konzeption eines digitalisierten Kundenauftragsprozesses für einen B2B-Komponentenhersteller (2019)
Schmitt, Christian ; Decker, Mike ; Röhrborn, Felix ; Heuser, Jana ; Nuwayu, Abnet ; Harrison González, Dunia ; Cöplü, Kaan ; Braun, Anja ; Palm, Daniel ; Ohlhausen, Peter
In der zunehmenden Individualisierung von Produkten zeigt sich, dass Kundennähe und digital vernetzte Zusammenarbeit aller Partner wertvolle Erfolgspotenziale darstellen. Für komplexe Kundenauftragsprozesse gilt es, zu vernetzen und die Prozesse und Systeme in Form eines ganzheitlichen Ansatzes zukunftsfähig zu gestalten. Dabei wird der Herausforderung begegnet, Daten und Dokumente zu digitalisieren und den manuellen Aufwand zu reduzieren. Der Untersuchungsgegenstand ist der Abwicklungsprozess, ausgehend von einer Online-Konfiguration durch den Kunden bis zur Bestellabwicklung. In diesem Beitrag wird ein Vorgehensmodell aufgezeigt, das Unternehmen in die Lage versetzt, ihren Kundenauftragsprozess durch ein digitales Geschäftsmodell zukunftsfähig auszugestalten. Nutzenpotenziale sind eine verstärkte Kundenbindung durch eng verzahnte digitale Kollaboration, verstärkte Wirtschaftlichkeit durch Reduktion der Prozesskosten sowie eine Optimierung der Customer Experience durch effiziente Abläufe.
Data on production and characterization of melamine-furan-formaldehyde particles and reversible reactions thereof (2019)
Urdl, Katharina ; Weiss, Stephanie ; Hesser, Günter ; Kandelbauer, Andreas ; Zikulnig-Rusch, Edith ; Müller, Uwe ; Kern, Wolfgang
The data present in this article affords insides in the characterization of a newly described bi-functional furan-melamine monomer, which is used for the production of monodisperse, furan-functionalized melamine formaldehyde particles. In the related research article Urdl et al., 2019 data interpretations can be found. The furan functionalization of particles is necessary to perform reversible Diels-Alder reactions with maleimide (BMI) crosslinker to form thermoreversible network systems. To understand the reaction conditions of Diels Alder (DA) reaction with a Fu-Mel monomer and a maleimide crosslinker, model DA reaction were performed and evaluated using dynamic FT-IR measurements. During retro Diels-Alder (rDA) reactions of the monomer system, it was found out that some side reaction occurred at elevated temperatures. The data of evaluating the side reaction is described in one part of this manuscript. Additional high resolution SEM images of Fu Mel particles are shown and thermoreversible particle networks with BMI2 are shown. The data of different Fu-Mel particle networks with maleimide crosslinker are presented. Therefore, the used maleimide crosslinker with different spacer lengths were synthesized and the resulting networks were analyzed by ATR-FT-IR, SEM and DSC.
A novel LED-based 2D-fluorescence spectroscopy system for in-line monitoring of Chinese hamster ovary cell cultivations – Part I (2019)
Graf, Alexander ; Claßen, Jens ; Solle, Dörte ; Hitzmann, Bernd ; Rebner, Karsten ; Hoehse, Marek
A new two-dimensional fluorescence sensor system was developed for in-line monitoring of mammalian cell cultures. Fluorescence spectroscopy allows for the detection and quantification of naturally occurring intra- and extracellular fluorophores in the cell broth. The fluorescence signals correlate the the cells' current redox state and other relevant process parameters. Cell culture pretests with twelve different excitation wavelengths showed that only three wavelengths account for a vast majority of spectral variation. Accordingly, the newly developed device utilizes three high-power LEDs as excitation sources in combination with a back-thinned CCD-spectrometer for fluorescence detection.
Existiert ein Halo-Effekt bei Fans im deutschen Profi-Fußball? Ergebnisse einer empirischen Analyse, Implikationen für die Sportmanagement-Praxis und aktueller Bezug
Nufer, Gerd ; Mariot, David ; Bühler, André
Ein Halo-Effekt liegt vor, wenn der Eindruck eines dominanten Merkmals die Beurteilung anderer Eigenschaften eines Objekts beeinflusst. Es handelt sich um eine kognitive Verzerrung, die zu verzerrten Beurteilungen führt. In einem sportbezogenenen Kontext ist der Halo-Effekt bislang kaum erforscht worden, obwohl dies wesentlich dazu beitragen könnte, das Denken und Verhalten von Sportfans zu verstehen. Das Ziel des vorliegenden Beitrags ist es, die Frage zu beantworten, die gleichermaßen für die Theorie und die Praxis des Sportmanagements von Interesse ist: gibt es einen Halo-Effekt im Fußball? Der Beitrag präsentiert die Ergebnisse einer empirischen Untersuchung, in deren Rahmen Fans von Vereinen aus der deutschen Fußball-Bundesliga befragt wurden.
Characterisation of oxide layers on technical copper based on visible hyperspectral imaging (2019)
Stiedl, Jan ; Azemtsop, Georgette ; Boldrini, Barbara ; Green, Simon ; Chassé, Thomas ; Rebner, Karsten
The detection and characterisation of oxide layers on metallic copper samples plays an important role for power electronic modules in the automotive industry. However, since precise identification of oxide layers by visual inspection is difficult and time consuming due to inhomogeneous colour distribution, a reliable and efficient method for estimating their thickness is needed. In this study, hyperspectral imaging in the visible wavelength range (425–725 nm) is proposed as an in-line inspection method for analysing oxide layers in real-time during processing of copper components such as printed circuit boards in the automotive industry. For implementation in the production line a partial least square regression (PLSR) model was developed with a calibration set of n = 12 with about 13,000 spectra per sample to determine the oxide layer thickness on top of the technical copper surfaces. The model shows a good prediction performance in the range of 0–30 nm compared to Auger electron spectroscopy depth profiles as a reference method. The root mean square error (RMSE) is 1.75 nm for calibration and 2.70 nm for full cross validation. Applied to an external dataset of four new samples with about 13,000 spectra per sample the model provides an RMSE of 1.84 nm for prediction and demonstrates the robustness of the model during real-time processing. The results of this study prove the ability and usefulness of the proposed method to estimate the thickness of oxide layers on technical copper. Hence, the application of hyperspectral imaging for the industrial process control of electronic devices is very promising.
Wie die digitale Transformation gelingen kann (2019)
Homburg, Christian ; Wielgos, Dominik ; Kühnl, Christina
Die digitale Transformation verändert branchenübergreifend Geschäftsmodelle und ist damit ein Schlüssel für den langfristigen Unternehmenserfolg. In der Praxis scheitert sie jedoch häufig an der richtigen Umsetzung. Der Digital-Business-Excellence-Ansatz soll Unternehmen helfen, den digitalen Wandel erfolgreich zu gestalten.
Die sechs Gefahren der digitalen Arbeitswelt - und was Sie dagegen tun können (2019)
Thiemann, Daniel ; Kaiser, Stephan ; Jager, Andreas ; Rauch, Ricarda
In dem Forschungs- und Entwicklungsprojekt Digitrain 4.0 wurden sechs Gefahren für die digitale Arbeitswelt identifiziert, mit denen die Betriebe umgehen müssen. Die Forscher haben dafür auch Lösungsansätze entwickelt.
Surface modification of Polydimethylsiloxane by hydrogels for microfluidic applications (2019)
Yang, Linxiao ; Zhang, Zenghao ; Athanasopulu, Kiriaki ; Frey, Kerstin ; Cui, Zhishan ; Su, Haijia ; Luo, Liu ; Kemkemer, Ralf
In vitro, hydrogel-based ECMs for functionalizing surfaces of various material have played an essential role in mimicking native tissue matrix. Polydimethylsiloxane (PDMS) is widely used to build microfluidic or organ-on-chip devices compatible with cells due to its easy handling in cast replication. Despite such advantages, the limitation of PDMS is its hydrophobic surface property. To improve wettability of PDMS-based devices, alginate, a naturally derived polysaccharide, was covalently bound to the PDMS surface. This alginate then crosslinked further hydrogel onto the PDMS surface in desired layer thickness. Hydrogel-modified PDMS was used for coating a topography chip system and in vitro investigation of cell growth on the surfaces. Moreover, such hydrophilic hydrogel-coated PDMS is utilized in a microfluidic device to prevent unspecific absorption of organic solutions. Hence, in both exemplary studies, PDMS surface properties were modified leading to improved devices.
Classification of optical technologies for the mapping of production environments (2019)
Greger, Marius ; Palm, Daniel ; Louw, Louis ; Leipzig, Konrad von
Indoor localization systems are becoming more and more important with the digitalization of the industrial sector. Sensor data such as the current position of machines, transport vehicles, goods or tools represent an essential component of cyber physical production systems (CCPS). However, due to the high costs of these sensors, they are not widespread and are used mainly in special scenarios. However, especially optical indoor positioning systems (OIPS) based on cameras have certain advantages due to their technological specifications. In this paper, the application scenarios and requirements as well as their characteristics are presented and a classification approach of OIPS is introduced.
Cell type-dependent integrin distribution in adhesion and migration responses on protein-coated microgrooved substrates (2019)
Sales, Adria ; Ende, Karen ; Diemer, Jennifer ; Kyvik, Adriana ; Veciana, Jaume ; Ratera, Imma ; Kemkemer, Ralf
Although integrins are responsible for the interaction of cells with their environment, e.g., the extracellular matrix or artificial substrates, there is still a lack of knowledge about their role in cell adhesion and migration on protein-coated substrates with microtopography. Understanding such interactions could lead to new applications in e.g., medical implants as well as shed light on processes such as embryonic development, angiogenesis, wound healing, and tumor progression. In this work, the influence of surface topography and chemistry on αvβ3 and α5β1 integrin-mediated cell adhesion and migration of healthy and malignant human cell types (human coronary artery endothelial cells, human osteosarcoma cells, and human skin fibroblasts cells) was studied, using microgrooved and flat substrates covered by two different extracellular proteins, fibronectin and vitronectin. Although some general behaviors can be observed, cell migration (speed, directionality, and persistence time) and morphological adaptation (cell area, aspect ratio, and circularity) of cells on protein coated microgrooved substrates are mainly dependent on the cell type and its specific integrin expression.
Using deep correlation features to define the meta style of cell images for classification (2019)
Grützmacher, Simon ; Kemkemer, Ralf ; Curio, Cristóbal
Digital light microscopy techniques are among the most widely used methods in cell biology and medical research. Despite that, the automated classification of objects such as cells or specific parts of tissues in images is difficult. We present an approach to classify confluent cell layers in microscopy images by learned deep correlation features using deep neural networks. These deep correlation features are generated through the use of gram-based correlation features and are input to a neural network for learning the correlation between them. In this work we wanted to prove if a representation of cell data based on this is suitable for its classification as has been done for artworks with respect to their artistic period. The method generates images that contain recognizable characteristics of a specific cell type, for example, the average size and the ordered pattern.
Stronger than they look (2019)
Holle, Andrew ; Kemkemer, Ralf
An experimental study of living cells suggests that single myosin molecules are capable of generating unusually large forces. The observation is supported by a theoretical model - and demonstrates the complexity of in vivo force generation.

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