@inproceedings{13557,
  abstract     = {{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.}},
  author       = {{Blömer, Johannes and Löken, Nils}},
  booktitle    = {{12th International Symposium on Foundations and Practice of Security, FPS 2019}},
  publisher    = {{Springer}},
  title        = {{{Dynamic Searchable Encryption with Access Control}}},
  volume       = {{12056}},
  year         = {{2019}},
}

@article{13650,
  abstract     = {{<jats:p>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.</jats:p>}},
  author       = {{Suwannasopon, Satayu and Meyer, Fabian and Schlickriede, Christian and Chaisakul, Papichaya and T-Thienprasert, Jiraroj and Limtrakul, Jumras and Zentgraf, Thomas and Chattham, Nattaporn}},
  issn         = {{2073-4352}},
  journal      = {{Crystals}},
  number       = {{10}},
  pages        = {{515}},
  title        = {{{Miniaturized Metalens Based Optical Tweezers on Liquid Crystal Droplets for Lab-on-a-Chip Optical Motors}}},
  doi          = {{10.3390/cryst9100515}},
  volume       = {{9}},
  year         = {{2019}},
}

@article{13651,
  author       = {{Chen, Shumei and Reineke, Bernhard and Li, Guixin and Zentgraf, Thomas and Zhang, Shuang}},
  issn         = {{1530-6984}},
  journal      = {{Nano Letters}},
  number       = {{9}},
  pages        = {{6278--6283}},
  title        = {{{Strong Nonlinear Optical Activity Induced by Lattice Surface Modes on Plasmonic Metasurface}}},
  doi          = {{10.1021/acs.nanolett.9b02417}},
  volume       = {{19}},
  year         = {{2019}},
}

@inproceedings{16032,
  author       = {{Stallmeister, Tim and Chalicheemalapalli Jayasankar, Deviprasad and Wang, Z. and Tröster, Thomas}},
  isbn         = {{9781925627220}},
  location     = {{Melbourne }},
  title        = {{{Self-sealing tool concept for RTM-processes}}},
  year         = {{2019}},
}

@inproceedings{16033,
  author       = {{Stallmeister, Tim and Chalicheemalapalli Jayasankar, Deviprasad and Wang, Z. and Tröster, Thomas}},
  location     = {{Neu-Ulm}},
  title        = {{{Selbstabdichtendes Werkzeugkonzept für RTM-Prozesse}}},
  year         = {{2019}},
}

@article{22047,
  abstract     = {{Plastic freeforming (PF) is an additive-manufacturing process for producing three-dimensional plastic parts based on 3D CAD data by applying plastic droplets in layers. This process is used to produce customer-specific and complex geometries (prototypes and small series) on organic sheets. A comparable serial process is the injection of a second component onto organic sheets by injection molding. A sufficient bond between the PF structure and the organic sheets is of particular importance for each application. If this is not guaranteed, the composite system cannot withstand the mechanical load and fails. The force exerted on the system can no longer be transmitted between the PF structure and the organic sheet. The organic sheet is made of glass fiber-reinforced polypropylene (PP). The connection between the organic sheet and the PF structure is achieved by welding the molten polymer droplets and the surface of the organic sheet. The PF structures are made of PP to ensure sufficient compatibility with regard to the weldability of the components. The processing of PP in the PF process is a challenge because PP is a semicrystalline material. The shrinkage of semi-crystalline materials is significantly higher compared to amorphous materials. Due to the layered structure of the components, the shrinkage of the individual layers results in undesired warpage. The adhesive strength between the organic sheet and the PF structure is investigated by determining the bending strength in the 3-point bending test. The investigations include an optimization of the process parameters to maximize the adhesive strength. The experimental investigations show that an increase of the nozzle and build chamber temperature leads to a higher adhesive strength. In further investigations, the temperature of the nozzle shows no significant influence on the surface temperature despite the expected heat radiation. The surface temperature is almost only dependent on the temperature of the build chamber.}},
  author       = {{Moritzer, Elmar and Hirsch, André and Heim, H.P. and Cherif, C. and Truemper, W.}},
  journal      = {{Welding in the World}},
  pages        = {{867--873}},
  publisher    = {{Springer}},
  title        = {{{Plastic droplet welding: bond strength between plastic freeforming structures and continuous fiber-reinforced thermoplastic composites}}},
  doi          = {{10.1007/s40194-019-00714-3}},
  volume       = {{63}},
  year         = {{2019}},
}

@inproceedings{22028,
  abstract     = {{The mechanical properties of thin-walled plastic components are limited. One approach to improve the strength or stiffness of these components is to reinforce the thin-walled areas with an individually adapted Fused Deposition Modeling structure. Fused Deposition Modeling (FDM) is one of the most commonly used additive manufacturing processes. This process is characterized by the deposition of a fused, thermoplastic filament. Depending on the form of the reinforcement structure, the resulting hybrid structure should show higher strength or stiffness. The objective of the project is to determine constructive design and process guidelines for FDM structures. The FDM structure is to be used as a partial reinforcement for lightweight components and be adapted to the respective load conditions. Because of the lightweight application, the FDM structure should also have the lowest possible weight. The optimization of the FDM parts for different load cases is realized by adapting the design parameters. These parameters influence the layer generation and therefore also the inner structure of the FDM parts. In preliminary studies, the manufacturing restrictions of the FDM process are defined. The specimens are manufactured based on the Design of Experiments. To determine the static strength properties, different tests (tensile, compression, flexural, torsion and impact) are carried out. The investigations show that the filling strategy affects the mechanical properties. As a result of the investigations, design and process guidelines for the FDM structures are established according to the load conditions.}},
  author       = {{Moritzer, Elmar and Hirsch, André and Bürenhaus, Franziska Isabelle}},
  booktitle    = {{AIP Conference Proceedings}},
  number       = {{1}},
  publisher    = {{AIP Publishing}},
  title        = {{{Development and Modeling of Design and Process Guidelines for FDM Structures for the Partial Reinforcement of Hybrid Structures}}},
  doi          = {{10.1063/1.5088314}},
  volume       = {{2065}},
  year         = {{2019}},
}

@inproceedings{22027,
  abstract     = {{Additive manufacturing processes, like the Fused Deposition Modeling (FDM) process, do not need product-specific tools and create parts directly from the CAD data. In the FDM process, the semi-finished product, a wire of a thermoplastic polymer, is melted and forced through a nozzle. The continuous positioning of this nozzle allows the polymer to weld together strand by strand and layer by layer to produce a component. Because no mold is used in the FDM process, no holding pressure can be generated as in injection molding processes, in which the holding pressure is used to minimize the shrinkage and warpage of the part. In the FDM process, the part is generated in an ambient pressure environment. Each strand cools down and shrinks separately. This causes residual stresses in the part that can lead to major warpage and a complete stoppage of the process. This is the main reason why the material selection in the FDM process is restricted in comparison to conventional polymer processing technologies. In this paper, the warpage of different polymers is quantified as a criterion for evaluating the processability of polymers in the FDM process. Due to the process principle, the part properties in the FDM process are mainly influenced by the machine quality and the data processing, so that it is difficult to test a material for FDM independently of the machine and the data processing. Considering these influences, a custom-built specimen is created to test and quantify the warpage of different types of blended and reinforced polyamide 6. Considering the experimentally investigated warpage, the materials can be evaluated and the warpage can be related to the shrinkage investigated in pvT measurements. This procedure allows the machine- and process-independent rating of the processability in terms of warpage for different materials. Alongside other criteria, this is a necessary step to develop new materials with good processability in the FDM process.}},
  author       = {{Schöppner, Volker and Schumacher, C. and Fels, C.}},
  booktitle    = {{AIP Conference Proceedings}},
  publisher    = {{AIP Publishing}},
  title        = {{{A Method to Evaluate the Process-Specific Warpage for Different Polymers in the FDM Process}}},
  doi          = {{10.1063/1.5088315}},
  year         = {{2019}},
}

@book{22026,
  abstract     = {{Das Fused Deposition Modeling (FDM) ist ein etabliertes additives Fertigungsverfahren zur Her-stellung von thermoplastischen Kunststoffbauteilen. In dem vorliegenden Beitrag sind FDM-Verstärkungsstrukturen aus dem Material Ultem 9085 dynamischen Langzeituntersuchungen un-terzogen worden. Dabei wurde die innere Struktur der Probekörper über eine Parametervariation verändert, sodass anschließend die signifikanten Einflussfaktoren auf die Langzeitfestigkeit un-ter dynamischer Belastung identifiziert und analysiert werden konnten. Mit dieser Vorgehens-weise sollte gleichzeitig eine Optimierung der FDM-Verstärkungsstrukturen hinsichtlich der dy-namischen Langzeiteigenschaften bei Biege- und Druckbelastungen vorgenommen werden. Des Weiteren sind anhand der Probekörper die auftretenden Bruch- und Rissausbreitungsmechanis-men analysiert worden. Anhand der ermittelten Wöhlerkurven kann die Lebensdauer unter dy-namischer Belastung abgeschätzt werden. Außerdem zeigen die Untersuchungen, dass Fehlstel-len durch eine hohe Strangbreite und Überfüllungen im Bauteil für Schwachstellen in den FDM-Verstärkungsstrukturen sorgen, an denen Risse bei Druckbelastung entstanden sind und sich dadurch schneller ausbreiten konnten.}},
  author       = {{Moritzer, Elmar and Hirsch, André and Paulus, S.}},
  isbn         = {{978-3-658-27411-5}},
  pages        = {{185--198}},
  publisher    = {{Springer Vieweg}},
  title        = {{{Rissausbreitungsmechanismen in FDM-Verstärkungsstrukturen unter dynamischer Beanspruchung}}},
  doi          = {{10.1007/978-3-658-27412-2}},
  year         = {{2019}},
}

@misc{7720,
  abstract     = {{Die Erfindung betrifft einen optischen Übergang zwischen zwei optischen Schichtwellenleitern. Dazu ist eine Anordnung vorgesehen aus einem ersten optischen Schichtwellenleiter (2) und einem zweiten optischen Schichtwellenleiter (3), wobei der erste optische Schichtwellenleiter (2) und der zweite optische Schichtwellenleiter (3) voneinander verschiedene über ihre jeweilige Länge konstante Dicken (d, r) aufweisen, der erste optische Schichtwellenleiter (2) mit dem zweiten optischen Schichtwellenleiter (3) mittels einer optischen Schichtwellenleiterstruktur (4) verbunden ist, die über ihre gesamte Länge (w) eine Dicke (h) aufweist, die zwischen der Dicke (d) des ersten optischen Schichtwellenleiters (2) und der Dicke (r) des zweiten optischen Schichtwellenleiters (3) liegt. Erfindungsgemäß ist die Dicke (h) der optischen Schichtwellenleiterstruktur (4) über die gesamte Länge (w) der optischen Schichtwellenleiterstruktur (4) konstant. Damit wird eine Möglichkeit für einen effizienten und mit geringen Verlusten behafteten Übergang zwischen zwei optischen Schichtwellenleitern mit unterschiedlicher Dicke bereitgestellt. }},
  author       = {{Hammer, Manfred and Förstner, Jens and Ebers, Lena}},
  keywords     = {{tet_topic_waveguides}},
  pages        = {{9}},
  title        = {{{Optical transition between two optical waveguides layer and method for transmitting light}}},
  year         = {{2019}},
}

@phdthesis{34167,
  author       = {{Riebler, Heinrich}},
  title        = {{{Efficient parallel branch-and-bound search on FPGAs using work stealing and instance-specific designs}}},
  doi          = {{10.17619/UNIPB/1-830}},
  year         = {{2019}},
}

@inproceedings{13259,
  author       = {{Chen, Wei-Fan and Al-Khatib, Khalid and Hagen, Matthias and Wachsmuth, Henning and Stein, Benno}},
  booktitle    = {{Proceedings of the Second Workshop on Natural Language Processing for Internet Freedom}},
  pages        = {{76--82}},
  title        = {{{Unraveling the Search Space of Abusive Language in Wikipedia with Dynamic Lexicon Acquisition}}},
  year         = {{2019}},
}

@article{31265,
  author       = {{Dyatlov, Semyon and Borthwick, David and Weich, Tobias}},
  issn         = {{1435-9855}},
  journal      = {{Journal of the European Mathematical Society}},
  keywords     = {{Applied Mathematics, General Mathematics}},
  number       = {{6}},
  pages        = {{1595--1639}},
  publisher    = {{European Mathematical Society - EMS - Publishing House GmbH}},
  title        = {{{Improved fractal Weyl bounds for hyperbolic manifolds. With an appendix by David Borthwick, Semyon Dyatlov and Tobias Weich}}},
  doi          = {{10.4171/jems/867}},
  volume       = {{21}},
  year         = {{2019}},
}

@article{30716,
  author       = {{Kraus, M. and Frey, P. and Kleffel, T. and Drummer, D. and Merklein, M.}},
  journal      = {{AIP Conference Proceedings}},
  pages        = {{050006}},
  title        = {{{Mechanical joining without auxiliary element by cold formed pins for multi-material-systems}}},
  doi          = {{10.1063/1.5112570}},
  volume       = {{2113}},
  year         = {{2019}},
}

@inproceedings{22041,
  abstract     = {{The Arburg Plastic Freeforming (APF) is an additive manufacturing process that allows three-dimensional, thermoplastic components to be produced in layer by layer. The components are generated by depositing fine, molten plastic droplets. One of the main advantages of the APF process is the open machine control. Thus, the process parameters can be adapted and optimized for the individual applications. The optimization is carried out on the basis of a variation of the process parameters using a statistical design of experiments. Relevant process parameters are the layer thickness, the form factor, the raster and delta angle as well as the overlap between the contour and the filling of a layer. In addition, the nozzle and build chamber temperatures are varied. Using this procedure, the effects of the influencing parameters on the mechanical properties and the interactions between the influencing parameters are analyzed and converted into mathematical models. On the basis of the results and the models, guidelines will be developed to assist the user of APF technology in the systematic process configuration for their own applications. The material used is ABS, one of the most frequently used amorphous thermoplastics in additive manufacturing. The mechanical properties are determined on the basis of tensile tests and the characteristic values tensile strength, elongation at break and Young's modulus. The results should show the performance of the APF technology in regard to the mechanical properties.}},
  author       = {{Moritzer, Elmar and Hirsch, André and Hecker, Felix}},
  booktitle    = {{30th Annual International Solid Freeform Fabrication Symposium}},
  pages        = {{705--714}},
  title        = {{{Process Parameter Optimization to Improve the Mechanical Properties of Arburg Plastic Freeformed Components}}},
  doi          = {{http://dx.doi.org/10.26153/tsw/17308}},
  volume       = {{30}},
  year         = {{2019}},
}

@inproceedings{51268,
  abstract     = {{CACC systems have been proven to increase road utilization, safety and decrease fuel consumption by driving with a small headway at freeway speed. Such platooning systems are usually focused on freeway scenarios and most of the current research is done for this use case. Especially in urban scenarios at traffic lights and intersections there is a lot of potential to increase the traffic efficiency and safety by applying platooning mechanisms. Most of the techniques used on freeways are not applicable for urban scenarios, as freeways are more or less a multi lane one-way road. In my PhD project I want to investigate platooning as an application for urban scenarios. For this I plan to examine platooning for signalized and non-signalized intersections in a first step, but also consider platoon formation strategies and driver models for human driven platoons. The end result should be a set of algorithms and strategies to make urban and rural traffic more efficient and safer by the use of platooning. Evaluation and analysis will mainly be done by using simulations, but not limited to that.}},
  author       = {{Hardes, Tobias}},
  booktitle    = {{International Conference on Networked Systems (NetSys 2019), PhD Forum}},
  location     = {{Munich}},
  title        = {{{Research Statement: Urban Platooning}}},
  year         = {{2019}},
}

@article{36846,
  author       = {{Kruse, Anne and Mummert, Michael}},
  issn         = {{1864-2993}},
  journal      = {{Werkstatt:Dialog}},
  number       = {{4}},
  pages        = {{34--35}},
  title        = {{{Mit 3D-Druck umfassende Teilhabe möglich machen }}},
  year         = {{2019}},
}

@article{30715,
  author       = {{Dworschak, F. and Zirngibl, C. and Schleich, B. and Wartzack, S.}},
  journal      = {{DFX 2019: Proceedings of the 30th Symposium Design for X, 18-19 September 2019, Jesteburg, Germany}},
  title        = {{{Konzept für den MBSE-Einsatz zur automatisierten Individualisierung von komplexen Produkten}}},
  doi          = {{10.35199/dfx2019.24}},
  year         = {{2019}},
}

@inproceedings{22202,
  abstract     = {{Structural parts for aviation have very high demands on the development and production process. Therefore, the entire process must be considered in order to produce high-quality AM metal parts. In this case study, a conventional part was selected to be optimized for AM. The process presented includes component selection, design improvement with a novel approach for topology optimization based on the AMendate algorithm as basis of MSC Apex Generative Design,component production on a SLM 250 HL and post-processing including heat treatment and surface smoothing. With the topology optimization a weight reduction of ~60 % could be realized, whereby the stress distribution is more homogeneous. Furthermore, the challenges of support optimization and post-processing have to be addressed, in order to produce competitive parts.}},
  author       = {{Klippstein, Sven Helge and Duchting, Anne and Reiher, Thomas and Hengsbach, F. and Menge, Dennis and Schmid, Hans-Joachim}},
  booktitle    = {{30th Annual International Solid Freeform Fabrication Symposium}},
  pages        = {{1932--1945}},
  title        = {{{Devolopment, Production and post-processing of a topology optimized aircraft bracket }}},
  volume       = {{30}},
  year         = {{2019}},
}

@article{14544,
  author       = {{Vondran, J. and Spitzer, F. and Bayer, M. and Akimov, I. A. and Trautmann, Alexander and Reichelt, Matthias and Meier, Cedrik and Weber, N. and Meier, Torsten and André, R. and Mariette, H.}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{15}},
  pages        = {{155308}},
  title        = {{{Spatially asymmetric transients of propagating exciton-polariton modes in a planar CdZnTe/CdMgTe guiding structure}}},
  doi          = {{10.1103/physrevb.100.155308}},
  volume       = {{100}},
  year         = {{2019}},
}