TY - GEN AB - We analyze the incentives for retail bundling and the welfare effects of retail bundling in a decentralized distribution channel with two retailers and two monopolistic manufacturers. One manufacturer exclusively sells his good to one retailer, whereas the other manufacturer sells his good to both retailers. Thus, one retailer is a monopolist for one product but competes with the other retailer in the second product market. The two-product retailer has the option to bundle his goods or to sell them separately. We find that bundling aggravates the double marginalization problem for the bundling retailer. Nevertheless, when the retailers compete in prices, bundling can be more profitable than separate selling for the retailer as bundling softens the retail competition. The ultimate outcome depends on the manufacturers’ marginal costs. Given retail quantity competition, however, bundling is in no case the retailer’s best strategy. Furthermore, we show that profitable bundling reduces consumer and producer surplus in the equilibrium. AU - Heinzel, Joachim Maria Josef ID - 10332 KW - retail bundling KW - leverage theory KW - double marginalization TI - Bundling in a Distribution Channel with Retail Competition ER - TY - GEN AU - Pukrop, Simon ID - 10344 TI - Scheduling Algorithms for Multi-Operation Jobs with Setups on a Single Machine ER - TY - CONF AB - We propose a novel personal reputation system for cross-platform reputation. We observe that, in certain usage scenarios, e.g. crowd work, the rater anonymity property typically imposed on reputation systems is not necessary. Instead, we propose a relaxed notion of rater anonymity that is more applicable in the crowd work scenario. This allows us to construct a secure personal reputation system from simple cryptographic primitives. AU - Blömer, Johannes AU - Löken, Nils ID - 13554 T2 - Security and Trust Management, STM 2019 TI - Personal Cross-Platform Reputation VL - 11738 ER - TY - CONF AB - We present a searchable encryption scheme for dynamic document collections in a multi-user scenario. Our scheme features fine-grained access control to search results, as well as access control to operations such as adding documents to the document collection, or changing individual documents. The scheme features verifiability of search results. Our scheme also satisfies the forward privacy notion crucial for the security of dynamic searchable encryption schemes. AU - Blömer, Johannes AU - Löken, Nils ID - 13557 T2 - 12th International Symposium on Foundations and Practice of Security, FPS 2019 TI - Dynamic Searchable Encryption with Access Control VL - 12056 ER - TY - CONF AU - Bohn, Nicolai AU - Kundisch, Dennis ID - 13585 T2 - Proceedings of the 40th International Conference on Information Systems (ICIS) TI - All Things Considered? – Technology Design Decision-making Characteristics in Digital Startups ER - TY - GEN AU - Seutter, Janina AU - Neumann, Jürgen ID - 13586 T2 - Proceedings of the 40th International Conference on Information Systems (ICIS) TI - Head over Feels? Differences in Online Rating Behavior for Utilitarian and Hedonic Service Aspects ER - TY - CONF AU - Gutt, Dominik AU - Neumann, Jürgen AU - Jabr, W. AU - Kundisch, Dennis ID - 13587 T2 - Proceedings of the 40th International Conference on Information Systems (ICIS) TI - The App Updating Conundrum: Implications of Platform’s Rating Resetting on Developers’ Behavior ER - TY - GEN AU - Pilot, Matthias ID - 13592 TI - Efficient Finite-Field Arithmetic for Elliptic Curve Cryptography in Java ER - TY - CONF AU - Claes, Leander AU - Johannesmann, Sarah AU - Baumhögger, Elmar AU - Henning, Bernd ID - 13647 T2 - 2019 International Congress on Ultrasonics TI - Quantification of frequency-dependent absorption phenomena ER - TY - GEN AU - Scholz, Swante ID - 13648 TI - Implementation and Comparison of Elliptic Curve Algorithms in Java ER - TY - JOUR AB - Surfaces covered with layers of ultrathin nanoantenna structures—so called metasurfaces have recently been proven capable of completely controlling phase of light. Metalenses have emerged from the advance in the development of metasurfaces providing a new basis for recasting traditional lenses into thin, planar optical components capable of focusing light. The lens made of arrays of plasmonic gold nanorods were fabricated on a glass substrate by using electron beam lithography. A 1064 nm laser was used to create a high intensity circularly polarized light focal spot through metalens of focal length 800 µm, N.A. = 0.6 fabricated based on Pancharatnam-Berry phase principle. We demonstrated that optical rotation of birefringent nematic liquid crystal droplets trapped in the laser beam was possible through this metalens. The rotation of birefringent droplets convinced that the optical trap possesses strong enough angular momentum of light from radiation of each nanostructure acting like a local half waveplate and introducing an orientation-dependent phase to light. Here, we show the success in creating a miniaturized and robust metalens based optical tweezers system capable of rotating liquid crystals droplets to imitate an optical motor for future lab-on-a-chip applications. AU - Suwannasopon, Satayu AU - Meyer, Fabian AU - Schlickriede, Christian AU - Chaisakul, Papichaya AU - T-Thienprasert, Jiraroj AU - Limtrakul, Jumras AU - Zentgraf, Thomas AU - Chattham, Nattaporn ID - 13650 IS - 10 JF - Crystals SN - 2073-4352 TI - Miniaturized Metalens Based Optical Tweezers on Liquid Crystal Droplets for Lab-on-a-Chip Optical Motors VL - 9 ER - TY - JOUR AU - Chen, Shumei AU - Reineke, Bernhard AU - Li, Guixin AU - Zentgraf, Thomas AU - Zhang, Shuang ID - 13651 IS - 9 JF - Nano Letters SN - 1530-6984 TI - Strong Nonlinear Optical Activity Induced by Lattice Surface Modes on Plasmonic Metasurface VL - 19 ER - TY - CONF AU - Hinnenthal, Kristian AU - Scheideler, Christian AU - Struijs, Martijn ID - 13652 T2 - 33rd International Symposium on Distributed Computing (DISC 2019) TI - Fast Distributed Algorithms for LP-Type Problems of Low Dimension ER - TY - JOUR AU - Goller, Michael AU - Ursin, Jani AU - Vähäsantanen, Katja AU - Festner, Dagmar AU - Harteis, Christian ID - 13654 JF - Teaching and Teacher Education SN - 0742-051X TI - Finnish and German student teachers’ motivations for choosing teaching as a career. The first application of the FIT-Choice scale in Finland ER - TY - THES AU - Brauer, Sascha ID - 13679 TI - Classification and Approximation of Geometric Location Problems ER - TY - JOUR AU - Mahnken, Rolf AU - Ju, Xiaozhe ID - 13805 JF - International Journal for Numerical Methods in Engineering SN - 0029-5981 TI - Goal‐oriented adaptivity based on a model hierarchy of mean‐field and full‐field homogenization methods in linear elasticity ER - TY - JOUR AU - Dammann, Christian AU - Mahnken, Rolf ID - 13806 JF - Composites Part A: Applied Science and Manufacturing SN - 1359-835X TI - Simulation of a resin transfer molding process using a phase field approach within the theory of porous media VL - 120 ER - TY - JOUR AU - Ju, X. AU - Mahnken, R. ID - 13807 JF - PAMM TI - "Goal-oriented adaptivity on mean-field and full-field homogenization methods considering hierarchical unit cells" VL - 19 ER - TY - JOUR AU - Kremer, H.-Hugo AU - Frehe-Halliwell, Petra ID - 13809 JF - BWP TI - Entwicklungsförderliche Gestaltung von Qualifizierungsbausteinen in der dualisierten Ausbildungsvorbereitung ER - TY - CHAP AU - Kremer, H.-Hugo AU - Frehe-Halliwell, Petra ED - Veber, Marcel ED - Benölken, Ralf ED - Pfitzner, Michael ID - 13811 T2 - Potenzialorientierte Förderung in den Fachdidaktiken TI - Eine Analyse ausbildungsvorbereitender Bildungsgänge VL - Band 7 ER -