@article{LagemaatVosMaasetal.2014, author = {Lagemaat, Miriam W. and Vos, Eline K. and Maas, Marnix C. and Bitz, Andreas and Orzada, Stephan and Uden, Mark J. van and Kobus, Thiele and Heerschap, Arend and Scheenen, Tom W. J.}, title = {Phosphorus magnetic resonance spectroscopic imaging at 7 T in patients with prostate cancer}, series = {Investigative Radiology}, volume = {49}, journal = {Investigative Radiology}, number = {5}, publisher = {Lippincott Williams \& Wilkins}, address = {Philadelphia, Pa.}, issn = {1536-0210}, doi = {10.1097/RLI.0000000000000012}, pages = {363 -- 372}, year = {2014}, abstract = {Objectives The aim of this study was to identify characteristics of phosphorus (³¹P) spectra of the human prostate and to investigate changes of individual phospholipid metabolites in prostate cancer through in vivo ³¹P magnetic resonance spectroscopic imaging (MRSI) at 7 T. Materials and Methods In this institutional review board-approved study, 15 patients with biopsy-proven prostate cancer underwent T₂-weighted magnetic resonance imaging and 3-dimensional ³¹P MRSI at 7 T. Voxels were selected at the tumor location, in normal-appearing peripheral zone tissue, normal-appearing transition zone tissue, and in the base of the prostate close to the seminal vesicles. Phosphorus metabolite ratios were determined and compared between tissue types. Results Signals of phosphoethanolamine (PE) and phosphocholine (PC) were present and well resolved in most ³¹P spectra in the prostate. Glycerophosphocholine signals were observable in 43\% of the voxels in malignant tissue, but in only 10\% of the voxels in normal-appearing tissue away from the seminal vesicles. In many spectra, independent of tissue type, 2 peaks resonated in the chemical shift range of inorganic phosphate, possibly representing 2 separate pH compartments. The PC/PE ratio in the seminal vesicles was highly elevated compared with the prostate in 5 patients. A considerable overlap of ³¹P metabolite ratios was found between prostate cancer and normal-appearing prostate tissue, preventing direct discrimination of these tissues. The only 2 patients with high Gleason scores tumors (≥4+5) presented with high PC and glycerophosphocholine levels in their cancer lesions. Conclusions Phosphorus MRSI at 7 T shows distinct features of phospholipid metabolites in the prostate gland and its surrounding structures. In this exploratory study, no differences in ³¹P metabolite ratios were observed between prostate cancer and normal-appearing prostate tissue possibly because of the partial volume effects of small tumor foci in large MRSI voxels.}, language = {en} } @inproceedings{HarzheimHeuermann2018, author = {Harzheim, Thomas and Heuermann, Holger}, title = {Phase Repeatable Synthesizers as a New Harmonic Phase Standard for Nonlinear Network Analysis}, series = {IEEE Transactions on Microwave Theory and Techniques}, booktitle = {IEEE Transactions on Microwave Theory and Techniques}, publisher = {IEEE}, doi = {10.1109/TMTT.2018.2817513}, pages = {1 -- 8}, year = {2018}, language = {en} } @incollection{LuczakWolfSchlicketal.1999, author = {Luczak, Holger and Wolf, Martin and Schlick, Christopher and Springer, J. and Foltz, Christian}, title = {Personenorientierte Arbeitsprozesse und Kommunikationsforrnen}, series = {Integration von Entwicklungssystemen in Ingenieuranwendungen : substantielle Verbesserung der Entwicklungsprozesse}, booktitle = {Integration von Entwicklungssystemen in Ingenieuranwendungen : substantielle Verbesserung der Entwicklungsprozesse}, editor = {Nagl, Walter}, publisher = {Springer}, address = {Berlin}, isbn = {3-540-63920-9}, pages = {403 -- 422}, year = {1999}, language = {de} } @article{Ritz2002, author = {Ritz, Thomas}, title = {Personalized Information Services: Production and Distribution of these Services employing Mass-Customization}, year = {2002}, language = {en} } @article{Ritz2000, author = {Ritz, Thomas}, title = {Personalized information services : an electronic information commodity and its production}, series = {International Journal of E-Business Strategy Management}, volume = {2}, journal = {International Journal of E-Business Strategy Management}, number = {2}, issn = {1467-0305}, year = {2000}, language = {en} } @inproceedings{Ritz2001, author = {Ritz, Thomas}, title = {Personalized information services : an electronic information commodity and its production}, series = {Electronic publishing '01 : 2001 in the digital publishing odyssey ; proceedings of an ICCC/IFIP conference held at the University of Kent at Canterbury, Kent, United Kingdom, 5 - 7 July, 2001 ; [proceedings of the Fifth Conference on Electronic Publishing]}, booktitle = {Electronic publishing '01 : 2001 in the digital publishing odyssey ; proceedings of an ICCC/IFIP conference held at the University of Kent at Canterbury, Kent, United Kingdom, 5 - 7 July, 2001 ; [proceedings of the Fifth Conference on Electronic Publishing]}, publisher = {IOS Press [u.a.]}, address = {Amsterdam}, isbn = {1-58603-191-0}, pages = {48 -- 58}, year = {2001}, language = {en} } @article{RitzHoof2002, author = {Ritz, Thomas and Hoof, Antonius J. M.}, title = {Personalisierung von Content basierten Services - Produktion von personalisierten Informationsdienstleistungen}, series = {Content Management : digitale Inhalte als Bausteine einer vernetzten Welt ; 18. Juni 2002, Stuttgart / Innovationsforum. Veranst. Verein zur F{\"o}rderung Produktionstechnischer Forschung e.V., Stuttgart. [Fraunhofer-Institut Arbeitswirtschaft und Organisatio}, journal = {Content Management : digitale Inhalte als Bausteine einer vernetzten Welt ; 18. Juni 2002, Stuttgart / Innovationsforum. Veranst. Verein zur F{\"o}rderung Produktionstechnischer Forschung e.V., Stuttgart. [Fraunhofer-Institut Arbeitswirtschaft und Organisatio}, publisher = {Fraunhofer-IRB-Verl.}, address = {Stuttgart}, isbn = {3-8167-6155-0}, pages = {91 -- 106}, year = {2002}, language = {de} } @article{SchubaHermanns1995, author = {Schuba, Marko and Hermanns, Oliver}, title = {Performance Investigations of the IP Multicast Architecture / Hermanns, Oliver ; Schuba, Marko}, series = {Performance of the IP Multicast Achitecture . Proceedings JENC 6. Proceedings of the 6th Joint European Networking Conference, Tel Aviv}, journal = {Performance of the IP Multicast Achitecture . Proceedings JENC 6. Proceedings of the 6th Joint European Networking Conference, Tel Aviv}, pages = {121-1 -- 121-8}, year = {1995}, language = {en} } @article{SchubaHaverkortSchneider2000, author = {Schuba, Marko and Haverkort, Boudewijn R. and Schneider, Gaby}, title = {Performance evaluation of multicast communication in packet-switched networks / Schuba, Marko ; Haverkort, Boudewijn R. ; Schneider, Gaby}, series = {Performance Evaluation. 39 (2000), H. 1-4}, journal = {Performance Evaluation. 39 (2000), H. 1-4}, isbn = {0166-5316}, pages = {61 -- 80}, year = {2000}, language = {en} } @article{FiedlerOrzadaFloeseretal.2022, author = {Fiedler, Thomas M. and Orzada, Stephan and Fl{\"o}ser, Martina and Rietsch, Stefan H. G. and Schmidt, Simon and Stelter, Jonathan K. and Wittrich, Marco and Quick, Harald H. and Bitz, Andreas and Ladd, Mark E.}, title = {Performance and safety assessment of an integrated transmitarray for body imaging at 7 T under consideration of specificabsorption rate, tissue temperature, and thermal dose}, series = {NMR in Biomedicine}, volume = {35}, journal = {NMR in Biomedicine}, number = {5}, publisher = {Wiley}, issn = {0952-3480 (Print)}, doi = {10.1002/nbm.4656}, pages = {1 -- 17}, year = {2022}, abstract = {In this study, the performance of an integrated body-imaging array for 7 T with 32 radiofrequency (RF) channels under consideration of local specific absorption rate (SAR), tissue temperature, and thermal dose limits was evaluated and the imaging performance was compared with a clinical 3 T body coil. Thirty-two transmit elements were placed in three rings between the bore liner and RF shield of the gradient coil. Slice-selective RF pulse optimizations for B1 shimming and spokes were performed for differently oriented slices in the body under consideration of realistic constraints for power and local SAR. To improve the B1+ homogeneity, safety assessments based on temperature and thermal dose were performed to possibly allow for higher input power for the pulse optimization than permissible with SAR limits. The results showed that using two spokes, the 7 T array outperformed the 3 T birdcage in all the considered regions of interest. However, a significantly higher SAR or lower duty cycle at 7 T is necessary in some cases to achieve similar B1+ homogeneity as at 3 T. The homogeneity in up to 50 cm-long coronal slices can particularly benefit from the high RF shim performance provided by the 32 RF channels. The thermal dose approach increases the allowable input power and the corresponding local SAR, in one example up to 100 W/kg, without limiting the exposure time necessary for an MR examination. In conclusion, the integrated antenna array at 7 T enables a clinical workflow for body imaging and comparable imaging performance to a conventional 3 T clinical body coil.}, language = {en} } @article{Schuba1999, author = {Schuba, Marko}, title = {Performance Analysis of Reliable Multicast Mechanisms for Widely Spread Distributed Applications in the Internet}, series = {International Conference on Parallel and Distributed Processing Techniques and Applications : PDPTA '99 ; June 28 - July 1, 1999, Las Vegas, Nevada, USA / ed.: Hamid R. Arabnia}, journal = {International Conference on Parallel and Distributed Processing Techniques and Applications : PDPTA '99 ; June 28 - July 1, 1999, Las Vegas, Nevada, USA / ed.: Hamid R. Arabnia}, isbn = {1892512157}, pages = {1 -- 7}, year = {1999}, language = {en} } @article{MuehlSchwarz1993, author = {M{\"u}hl, Thomas and Schwarz, Michael}, title = {Pegel- und D{\"a}mpfungsmessung an Wellenl{\"a}ngenmultiplex-Systemen und -Komponenten}, series = {Nachrichtentechnische Zeitschrift. 46 (1993), H. 1}, journal = {Nachrichtentechnische Zeitschrift. 46 (1993), H. 1}, isbn = {0027-707X}, pages = {36 -- 38}, year = {1993}, language = {de} } @article{HagemannGeittner1990, author = {Hagemann, Hans-J{\"u}rgen and Geittner, P.}, title = {PCVD hybrid technology for single mode fibres. Hagemann, H. J.; Geittner, P.}, series = {Proceedings : papers presented at: the 8th Annual European Fibre Optic Communications and Local Area Networks Exposition}, journal = {Proceedings : papers presented at: the 8th Annual European Fibre Optic Communications and Local Area Networks Exposition}, pages = {67 -- 72}, year = {1990}, language = {en} } @article{HagemannGeittnerWarnieretal.1986, author = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Warnier, J. and Wilson, H.}, title = {PCVD at high deposition rates. Geittner, P.; Hagemann, H. J.; Warnier, J.; Wilson, H.}, series = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 4 (1986), H. 7}, journal = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 4 (1986), H. 7}, isbn = {0733-8724}, pages = {818 -- 822}, year = {1986}, language = {en} } @article{SchollConradiWirtzetal.1997, author = {Scholl, Ingrid and Conradi, Helmut and Wirtz, D. and Spreckelsen, Cord}, title = {OrthoDocs - Ein modellbasiertes Werkzeug zur Erstellung orthop{\"a}discher Lerndokumente. Conradi, Helmar; Wirtz, D.; Spreckelsen, Cord; Scholl, Ingrid; Kreutz, Reinhard; Forst, R.; Spitzer, Klaus}, series = {Medizinische Informatik, Biometrie und Epidemiologie, GMDS '96, 41. Jahrestagung der GMDS, Bonn, September 1996}, journal = {Medizinische Informatik, Biometrie und Epidemiologie, GMDS '96, 41. Jahrestagung der GMDS, Bonn, September 1996}, publisher = {MVV, Medizin-Verl.}, address = {M{\"u}nchen}, isbn = {3820812954}, pages = {169 -- 173}, year = {1997}, language = {de} } @article{SchollKreutzConradietal.1997, author = {Scholl, Ingrid and Kreutz, Reinhard and Conradi, Helmut and Spitzer, Klaus}, title = {Orientierungs- und Benutzerunterst{\"u}tzung in Web-Dokumenten. Kreutz, Reinhard; Conradi, Helmut; Scholl, Ingrid; Spitzer, Klaus}, series = {Informatik '97 : Informatik als Innovationsmotor ; 27. Jahrestagung der Gesellschaft f{\"u}r Informatik Aachen, 24. - 26. September 1997 / Hrsg.: Matthias Jarke ...}, journal = {Informatik '97 : Informatik als Innovationsmotor ; 27. Jahrestagung der Gesellschaft f{\"u}r Informatik Aachen, 24. - 26. September 1997 / Hrsg.: Matthias Jarke ...}, publisher = {Springer}, address = {Berlin}, isbn = {3-540-63066-X}, pages = {516 -- 517}, year = {1997}, language = {de} } @article{KoehlerWolf2020, author = {K{\"o}hler, Klemens and Wolf, Martin}, title = {Organisatorische Maßnahmen zu Erh{\"o}hung der IT Sicherheit - Empfehlungen aus der Perspektive der Konflikttheorie}, number = {Preprint}, year = {2020}, abstract = {Die NATO definiert den Cyberspace als die "Umgebung, die durch physische und nicht-physische Bestandteile zum Speichern, {\"A}ndern, und Austauschen von Daten mit Hilfe von Computer-Netzwerken" [NATO CCDCOE]. Dar{\"u}ber hinaus ist es ein Medium menschlicher Interaktion. IT Angriffe sind feindselige, nichtkooperative Interaktionen, die mittels Konflikttheorie beschrieben werden k{\"o}nnen. Durch die Anwendung dieses Gedankengeb{\"a}udes auf IT Sicherheit von Organisationen k{\"o}nnen eine Reihe von Verbesserungen in Unternehmen identifiziert werden.}, language = {de} } @article{FerreinBoehnstedtLakemeyer2007, author = {Ferrein, Alexander and B{\"o}hnstedt, Lutz and Lakemeyer, Gerhard}, title = {Options in readylog reloaded -- generating decision-theoretic plan libraries in golog / B{\"o}hnstedt, Lutz ; Ferrein, Alexander ; Lakemeyer, Gerhard}, series = {KI 2007: advances in artificial intelligence : 30th Annual German Conference on AI, KI 2007, Osnabr{\"u}ck, Germany, September 10 - 13, 2007 ; proceedings}, journal = {KI 2007: advances in artificial intelligence : 30th Annual German Conference on AI, KI 2007, Osnabr{\"u}ck, Germany, September 10 - 13, 2007 ; proceedings}, publisher = {Springer}, address = {Berlin}, isbn = {978-3-540-74564-8}, pages = {352 -- 366}, year = {2007}, language = {en} } @misc{Alt2010, author = {Alt, Helmut}, title = {Optionen einer bezahlbaren Energieversorgung „Vision versus Realismus" : Beitrag f{\"u}r KTG Kongress: vom 4. bis 6. Mai 2010, Berlin}, pages = {1 -- 10}, year = {2010}, language = {de} } @article{Benkner1998, author = {Benkner, Thorsten}, title = {Optimum Transmission Power in High Capacity Umbrella Cell Systems}, series = {Multiaccess, mobility and teletraffic : advances in wireless networks ; [proceedings of the Third Workshop on Multiaccess, Mobility and Teletraffic for Personal Communications held in December 1997 in Melbourne, Australia] / ed. by David Everitt ...}, journal = {Multiaccess, mobility and teletraffic : advances in wireless networks ; [proceedings of the Third Workshop on Multiaccess, Mobility and Teletraffic for Personal Communications held in December 1997 in Melbourne, Australia] / ed. by David Everitt ...}, publisher = {Kluwer}, address = {Boston, Mass. [u.a.]}, isbn = {0-7923-8091-6}, pages = {221 -- 232}, year = {1998}, language = {en} } @article{EngelsDoege1998, author = {Engels, Elmar and Doege, E.}, title = {Optimizing the number of strokes for punching machines using a fuzzy controlled electrohydraulic damping system / Doege, E. ; Engels, E.}, series = {ICME 98, CIRP International Seminar on Intelligent Computation in Manufacturing Engineering, Proceedings, Capri, IT, Jul 1-3, 1998}, journal = {ICME 98, CIRP International Seminar on Intelligent Computation in Manufacturing Engineering, Proceedings, Capri, IT, Jul 1-3, 1998}, address = {Capri}, pages = {471 -- 478}, year = {1998}, language = {en} } @inproceedings{LeiseAltherr2018, author = {Leise, Philipp and Altherr, Lena}, title = {Optimizing the design and control of decentralized water supply systems - a case-study of a hotel building}, series = {EngOpt 2018 Proceedings of the 6th International Conference on Engineering Optimization}, booktitle = {EngOpt 2018 Proceedings of the 6th International Conference on Engineering Optimization}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-97773-7}, doi = {10.1007/978-3-319-97773-7_107}, pages = {1241 -- 1252}, year = {2018}, abstract = {To increase pressure to supply all floors of high buildings with water, booster stations, normally consisting of several parallel pumps in the basement, are used. In this work, we demonstrate the potential of a decentralized pump topology regarding energy savings in water supply systems of skyscrapers. We present an approach, based on Mixed-Integer Nonlinear Programming, that allows to choose an optimal network topology and optimal pumps from a predefined construction kit comprising different pump types. Using domain-specific scaling laws and Latin Hypercube Sampling, we generate different input sets of pump types and compare their impact on the efficiency and cost of the total system design. As a realistic application example, we consider a hotel building with 325 rooms, 12 floors and up to four pressure zones.}, language = {en} } @incollection{MuellerAltherrAholaetal.2018, author = {M{\"u}ller, Tim M. and Altherr, Lena and Ahola, Marja and Schabel, Samuel and Pelz, Peter F.}, title = {Optimizing pressure screen systems in paper recycling: optimal system layout, component selection and operation}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-18499-5}, doi = {10.1007/978-3-030-18500-8_44}, pages = {355 -- 361}, year = {2018}, abstract = {Around 60\% of the paper worldwide is made from recovered paper. Especially adhesive contaminants, so called stickies, reduce paper quality. To remove stickies but at the same time keep as many valuable fibers as possible, multi-stage screening systems with several interconnected pressure screens are used. When planning such systems, suitable screens have to be selected and their interconnection as well as operational parameters have to be defined considering multiple conflicting objectives. In this contribution, we present a Mixed-Integer Nonlinear Program to optimize system layout, component selection and operation to find a suitable trade-off between output quality and yield.}, language = {en} } @inproceedings{AlhwarinSchifferFerreinetal.2018, author = {Alhwarin, Faraj and Schiffer, Stefan and Ferrein, Alexander and Scholl, Ingrid}, title = {Optimized KinectFusion Algorithm for 3D Scanning Applications}, series = {Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 2: BIOIMAGING}, booktitle = {Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 2: BIOIMAGING}, isbn = {978-989-758-278-3}, doi = {10.5220/0006594700500057}, pages = {50 -- 57}, year = {2018}, language = {en} } @article{BankOrzadaSmitsetal.2015, author = {Bank, Bart L. van de and Orzada, Stephan and Smits, Frits and Lagemaat, Miriam W. and Rodgers, Christopher T. and Bitz, Andreas and Scheenen, Tom W. J.}, title = {Optimized (31) P MRS in the human brain at 7 T with a dedicated RF coil setup}, series = {NMR in Biomedicine}, volume = {28}, journal = {NMR in Biomedicine}, number = {11}, publisher = {Wiley}, address = {Weinheim}, issn = {1099-1492}, doi = {10.1002/nbm.3422}, pages = {1570 -- 1578}, year = {2015}, language = {en} } @inproceedings{MuellerAltherrLeiseetal.2020, author = {M{\"u}ller, Tim M. and Altherr, Lena and Leise, Philipp and Pelz, Peter F.}, title = {Optimization of pumping systems for buildings: Experimental validation of different degrees of model detail on a modular test rig}, series = {Operations Research Proceedings 2019}, booktitle = {Operations Research Proceedings 2019}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-48438-5}, doi = {10.1007/978-3-030-48439-2_58}, pages = {481 -- 488}, year = {2020}, abstract = {Successful optimization requires an appropriate model of the system under consideration. When selecting a suitable level of detail, one has to consider solution quality as well as the computational and implementation effort. In this paper, we present a MINLP for a pumping system for the drinking water supply of high-rise buildings. We investigate the influence of the granularity of the underlying physical models on the solution quality. Therefore, we model the system with a varying level of detail regarding the friction losses, and conduct an experimental validation of our model on a modular test rig. Furthermore, we investigate the computational effort and show that it can be reduced by the integration of domain-specific knowledge.}, language = {en} } @article{MuellerLeiseLorenzetal.2020, author = {M{\"u}ller, Tim M. and Leise, Philipp and Lorenz, Imke-Sophie and Altherr, Lena and Pelz, Peter F.}, title = {Optimization and validation of pumping system design and operation for water supply in high-rise buildings}, series = {Optimization and Engineering}, volume = {2021}, journal = {Optimization and Engineering}, number = {22}, publisher = {Springer}, issn = {1573-2924}, doi = {10.1007/s11081-020-09553-4}, pages = {643 -- 686}, year = {2020}, abstract = {The application of mathematical optimization methods for water supply system design and operation provides the capacity to increase the energy efficiency and to lower the investment costs considerably. We present a system approach for the optimal design and operation of pumping systems in real-world high-rise buildings that is based on the usage of mixed-integer nonlinear and mixed-integer linear modeling approaches. In addition, we consider different booster station topologies, i.e. parallel and series-parallel central booster stations as well as decentral booster stations. To confirm the validity of the underlying optimization models with real-world system behavior, we additionally present validation results based on experiments conducted on a modularly constructed pumping test rig. Within the models we consider layout and control decisions for different load scenarios, leading to a Deterministic Equivalent of a two-stage stochastic optimization program. We use a piecewise linearization as well as a piecewise relaxation of the pumps' characteristics to derive mixed-integer linear models. Besides the solution with off-the-shelf solvers, we present a problem specific exact solving algorithm to improve the computation time. Focusing on the efficient exploration of the solution space, we divide the problem into smaller subproblems, which partly can be cut off in the solution process. Furthermore, we discuss the performance and applicability of the solution approaches for real buildings and analyze the technical aspects of the solutions from an engineer's point of view, keeping in mind the economically important trade-off between investment and operation costs.}, language = {en} } @inproceedings{AltherrPelzEdereretal.2017, author = {Altherr, Lena and Pelz, Peter F. and Ederer, Thorsten and Pfetsch, Marc E.}, title = {Optimale Getriebe auf Knopfdruck: Gemischt-ganzzahlige nichtlineare Optimierung zur Entscheidungsunterst{\"u}tzung bei der Auslegung von Getrieben f{\"u}r Kraftfahrzeuge}, series = {Antriebstechnisches Kolloquium ATK 2017}, booktitle = {Antriebstechnisches Kolloquium ATK 2017}, editor = {Jacobs, Georg}, isbn = {9783743148970}, pages = {313 -- 325}, year = {2017}, language = {de} } @incollection{AltherrLeisePfetschetal.2021, author = {Altherr, Lena and Leise, Philipp and Pfetsch, Marc E. and Schmitt, Andreas}, title = {Optimal design of resilient technical systems on the example of water supply systems}, series = {Mastering Uncertainty in Mechanical Engineering}, booktitle = {Mastering Uncertainty in Mechanical Engineering}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-78356-3}, pages = {429 -- 433}, year = {2021}, language = {en} } @article{SunAltherrPeietal.2018, author = {Sun, Hui and Altherr, Lena and Pei, Ji and Pelz, Peter F. and Yuan, Shouqi}, title = {Optimal booster station design and operation under uncertain load}, series = {Applied Mechanics and Materials}, volume = {885}, journal = {Applied Mechanics and Materials}, publisher = {Trans Tech Publications}, address = {B{\"a}ch}, issn = {1662-7482}, doi = {10.4028/www.scientific.net/AMM.885.102}, pages = {102 -- 115}, year = {2018}, abstract = {Given industrial applications, the costs for the operation and maintenance of a pump system typically far exceed its purchase price. For finding an optimal pump configuration which minimizes not only investment, but life-cycle costs, methods like Technical Operations Research which is based on Mixed-Integer Programming can be applied. However, during the planning phase, the designer is often faced with uncertain input data, e.g. future load demands can only be estimated. In this work, we deal with this uncertainty by developing a chance-constrained two-stage (CCTS) stochastic program. The design and operation of a booster station working under uncertain load demand are optimized to minimize total cost including purchase price, operation cost incurred by energy consumption and penalty cost resulting from water shortage. We find optimized system layouts using a sample average approximation (SAA) algorithm, and analyze the results for different risk levels of water shortage. By adjusting the risk level, the costs and performance range of the system can be balanced, and thus the system's resilience can be engineered}, language = {en} } @article{HagemannUngelenkWiechert1990, author = {Hagemann, Hans-J{\"u}rgen and Ungelenk, J. and Wiechert, D. U.}, title = {Optical time domain reflectometry (OTDR) of diameter modulations in single-mode fibers. Hagemann, H. J.; Ungelenk, J.; Wiechert, D. U.}, series = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 8 (1990), H. 11}, journal = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 8 (1990), H. 11}, isbn = {0733-8724}, pages = {1641 -- 1645}, year = {1990}, language = {en} } @inproceedings{RingbeckSchwarteBuxbaumetal.2001, author = {Ringbeck, Thorsten and Schwarte, Rudolf and Buxbaum, Bernd and Hess, Rudolf}, title = {Optical GMSK modem for infrared wireless communication based on a new receiver principle in CMOS technology}, series = {Optoelectronic interconnects VIII : 25 - 26 January 2001, San Jose, USA. - (Proceedings of SPIE ; 4292)}, booktitle = {Optoelectronic interconnects VIII : 25 - 26 January 2001, San Jose, USA. - (Proceedings of SPIE ; 4292)}, editor = {Tang, Suning}, publisher = {SPIE}, address = {Bellingham, Wash.}, isbn = {0-8194-3970-3}, issn = {0038-7355}, pages = {25 -- 34}, year = {2001}, language = {en} } @article{HagemannGudatKunz1975, author = {Hagemann, Hans-J{\"u}rgen and Gudat, W. and Kunz, C.}, title = {Optical constants from the far infrared to the X-ray region: Mg, Al, Cu, Ag, Au, Bi, C, and Al₂O₃}, series = {Journal of the Optical Society of America (JOSA)}, volume = {65}, journal = {Journal of the Optical Society of America (JOSA)}, number = {6}, publisher = {Optical Society of America}, address = {New York}, isbn = {0030-3941}, doi = {10.1364/JOSA.65.000742}, pages = {742 -- 744}, year = {1975}, language = {en} } @article{OrzadaBitzSchaeferetal.2011, author = {Orzada, Stephan and Bitz, Andreas and Sch{\"a}fer, Lena C. and Ladd, Susanne C. and Ladd, Mark E. and Maderwald, Stefan}, title = {Open design eight-channel transmit/receive coil for high-resolution and real-time ankle imaging at 7 T}, series = {Medical Physics}, volume = {38}, journal = {Medical Physics}, number = {3}, publisher = {Wiley}, address = {Hoboken}, issn = {2473-4209}, doi = {10.1118/1.3553399}, pages = {1162 -- 1167}, year = {2011}, abstract = {Purpose: At 1.5 T, real-time MRI of joint movement has been shown to be feasible. However, 7 T, provides higher SNR and thus an improved potential for parallel imaging acceleration. The purpose of this work was to build an open, U-shaped eight-channel transmit/receive microstrip coil for 7 T MRI to enable high-resolution and real-time imaging of the moving ankle joint. Methods: A U-shaped eight-channel transmit/receive array for the human ankle was built.urn:x-wiley:00942405:mp3399:equation:mp3399-math-0001-parameters and urn:x-wiley:00942405:mp3399:equation:mp3399-math-0002-factor were measured. SAR calculations of different ankle postures were performed to ensure patient safety. Inhomogeneities in the transmit field consequent to the open design were compensated for by the use of static RF shimming. High-resolution and real-time imaging was performed in human volunteers. Results: The presented array showed good performance with regard to patient comfort and image quality. High acceleration factors of up to 4 are feasible without visible acceleration artifacts. Reasonable image homogeneity was achieved with RF shimming. Conclusions: Open, noncylindrical designs for transmit/receive coils are practical at 7 T and real-time imaging of the moving joint is feasible with the presented coil design.}, language = {en} } @article{FerreinFritzLakemeyer2004, author = {Ferrein, Alexander and Fritz, Christian and Lakemeyer, Gerhard}, title = {On-Line Decision-Theoretic Golog for Unpredictable Domains / Ferrein, Alexander ; Fritz, Christian ; Lakemeyer, Gerhard}, series = {KI 2004: Advances in Artificial Intelligence : 27th Annual German Conference on AI, KI 2004, Ulm, Germany, September 20-24, 2004. Proceedings}, journal = {KI 2004: Advances in Artificial Intelligence : 27th Annual German Conference on AI, KI 2004, Ulm, Germany, September 20-24, 2004. Proceedings}, publisher = {Springer}, address = {Berlin}, pages = {322 -- 336}, year = {2004}, language = {en} } @article{FerreinSteinbauer2010, author = {Ferrein, Alexander and Steinbauer, Gerald}, title = {On the Way to High-Level Programming for Resource-Limited Embedded Systems with Golog}, series = {Simulation, Modeling, and Programming for Autonomous Robots}, journal = {Simulation, Modeling, and Programming for Autonomous Robots}, pages = {229 -- 240}, year = {2010}, language = {en} } @article{Zastrow1985, author = {Zastrow, Udo}, title = {On the formulation of the fundamental solutions for orthotropic plane elasticity}, series = {Acta Mechanica. 57 (1985), H. 3-4}, journal = {Acta Mechanica. 57 (1985), H. 3-4}, isbn = {1619-6937}, pages = {113 -- 122}, year = {1985}, language = {en} } @article{ZastrowHackl1988, author = {Zastrow, Udo and Hackl, Klaus}, title = {On the existence, uniqueness and completeness of displacements and stress functions in linear elasticity / Hackl, Klaus ; Zastrow, Udo}, series = {Journal of Elasticity. 19 (1988), H. 1}, journal = {Journal of Elasticity. 19 (1988), H. 1}, isbn = {1573-2681}, pages = {3 -- 23}, year = {1988}, language = {en} } @article{HeuermannSadeghfam2007, author = {Heuermann, Holger and Sadeghfam, Arash}, title = {On the design of multimode integrated circuits in multilayered processes / Sadeghfam, A. ; Heuermann, H.}, series = {European Microwave Conference, 2007, 9-12 Oct. 2007}, journal = {European Microwave Conference, 2007, 9-12 Oct. 2007}, isbn = {978-2-87487-001-9}, pages = {516 -- 519}, year = {2007}, language = {en} } @article{Zastrow1985, author = {Zastrow, Udo}, title = {On the complete system of fundamental solutions for anisotropic slices and slabs: A comparison by use of the slab analogy}, series = {Journal of Elasticity. 15 (1985), H. 3}, journal = {Journal of Elasticity. 15 (1985), H. 3}, isbn = {1573-2681}, pages = {293 -- 318}, year = {1985}, language = {en} } @article{AltherrJoggerstLeiseetal.2018, author = {Altherr, Lena and Joggerst, Laura and Leise, Philipp and Pfetsch, Marc E. and Schmitt, Andreas and Wendt, Janine}, title = {On obligations in the development process of resilient systems with algorithmic design methods}, series = {Applied Mechanics and Materials}, volume = {885}, journal = {Applied Mechanics and Materials}, number = {885}, publisher = {Trans Tech Publications}, address = {B{\"a}ch}, isbn = {1662-7482}, doi = {10.4028/www.scientific.net/AMM.885.240}, pages = {240 -- 252}, year = {2018}, abstract = {Advanced computational methods are needed both for the design of large systems and to compute high accuracy solutions. Such methods are efficient in computation, but the validation of results is very complex, and highly skilled auditors are needed to verify them. We investigate legal questions concerning obligations in the development phase, especially for technical systems developed using advanced methods. In particular, we consider methods of resilient and robust optimization. With these techniques, high performance solutions can be found, despite a high variety of input parameters. However, given the novelty of these methods, it is uncertain whether legal obligations are being met. The aim of this paper is to discuss if and how the choice of a specific computational method affects the developer's product liability. The review of legal obligations in this paper is based on German law and focuses on the requirements that must be met during the design and development process.}, language = {en} } @article{SchubaReichl1998, author = {Schuba, Marko and Reichl, Peter}, title = {On large-scale reliable multicast protocols / Schuba, M. ; Reichl, P.}, series = {6th IEE Conference on Telecommunications}, journal = {6th IEE Conference on Telecommunications}, isbn = {0-85296-700-4}, pages = {133 -- 137}, year = {1998}, language = {en} } @article{BitzZhouElQuardietal.2009, author = {Bitz, Andreas and Zhou, Yi and El Quardi, Abdessamad and Streckert, Joachim}, title = {Occupational Exposure at Mobile Communication Base Station Antenna Sites}, series = {Frequenz}, volume = {63}, journal = {Frequenz}, number = {7-8}, issn = {2191-6349}, doi = {10.1515/FREQ.2009.63.7-8.123}, pages = {123 -- 128}, year = {2009}, language = {en} } @article{SammFaissnerFrenzeletal.1980, author = {Samm, Doris and Faissner, H. and Frenzel, E. and Heinrigs, W.}, title = {Observation of the two-photon decay of a light penetrating particle / H. Faissner, E. Frenzel, W. Heinrigs, A. Preussger, D. Samm und U. Samm}, series = {Physics Letters B. Vol. 103 (1980), H. Issues 3}, journal = {Physics Letters B. Vol. 103 (1980), H. Issues 3}, pages = {234 -- 240}, year = {1980}, language = {en} } @article{SchollPalmLehmannetal.1998, author = {Scholl, Ingrid and Palm, Christoph and Lehmann, Thomas and Spitzer, Klaus}, title = {Nutzung eines Farbkonstanz-Algorithmus zur Entfernung von Glanzlichtern in laryngoskopischen Bildern. Palm, Christoph; Scholl, Ingrid, Lehmann, Thomas; Spitzer, Klaus.}, series = {Methoden der Medizinischen Informatik, Biometrie und Epidemiologie in der modernen Informationsgesellschaft}, journal = {Methoden der Medizinischen Informatik, Biometrie und Epidemiologie in der modernen Informationsgesellschaft}, publisher = {MVV, Medien und Medizin}, address = {M{\"u}nchen}, isbn = {3-8208-1335-7}, pages = {300 -- 303}, year = {1998}, language = {de} } @inproceedings{BischofEyKucketal.2015, author = {Bischof, Michael and Ey, Ludger and Kuck, Alexander and Rahier, Michael and Ritz, Thomas}, title = {Nutzerzentrierte Gestaltung und Entwicklung eines kontextsensitiven HMI}, series = {Mensch und Computer 2015 : Workshop}, booktitle = {Mensch und Computer 2015 : Workshop}, editor = {Weisbecker, Anette}, publisher = {De Gruyter Oldenbourg}, address = {Berlin}, isbn = {978-3-11-044333-2}, pages = {467 -- 474}, year = {2015}, language = {de} } @incollection{SchneiderWisselinkCzarnecki2018, author = {Schneider, Dominik and Wisselink, Frank and Czarnecki, Christian}, title = {Nutzen und Rahmenbedingungen 5 informationsgetriebener Gesch{\"a}ftsmodelle des Internets der Dinge}, series = {Digitalisierung in Unternehmen: von den theoretischen Ans{\"a}tzen zur praktischen Umsetzung}, booktitle = {Digitalisierung in Unternehmen: von den theoretischen Ans{\"a}tzen zur praktischen Umsetzung}, editor = {Barton, Thomas and M{\"u}ller, Christian and Seel, Christian}, publisher = {Springer}, address = {Wiesbaden}, isbn = {9783658227739}, doi = {10.1007/978-3-658-22773-9_5}, pages = {67 -- 85}, year = {2018}, abstract = {Im Kontext der zunehmenden Digitalisierung wird das Internet der Dinge (englisch: Internet of Things, IoT) als ein technologischer Treiber angesehen, durch den komplett neue Gesch{\"a}ftsmodelle im Zusammenspiel unterschiedlicher Akteure entstehen k{\"o}nnen. Identifizierte Schl{\"u}sselakteure sind unter anderem traditionelle Industrieunternehmen, Kommunen und Telekommunikationsunternehmen. Letztere sorgen mit der Bereitstellung von Konnektivit{\"a}t daf{\"u}r, dass kleine Ger{\"a}te mit winzigen Batterien nahezu {\"u}berall und direkt an das Internet angebunden werden k{\"o}nnen. Es sind schon viele IoT-Anwendungsf{\"a}lle auf dem Markt, die eine Vereinfachung f{\"u}r Endkunden darstellen, wie beispielsweise Philips Hue Tap. Neben Gesch{\"a}ftsmodellen basierend auf Konnektivit{\"a}t besteht ein großes Potenzial f{\"u}r informationsgetriebene Gesch{\"a}ftsmodelle, die bestehende Gesch{\"a}ftsmodelle unterst{\"u}tzen sowie weiterentwickeln k{\"o}nnen. Ein Beispiel daf{\"u}r ist der IoT-Anwendungsfall Park and Joy der Deutschen Telekom AG, bei dem Parkpl{\"a}tze mithilfe von Sensoren vernetzt und Autofahrer in Echtzeit {\"u}ber verf{\"u}gbare Parkpl{\"a}tze informiert werden. Informationsgetriebene Gesch{\"a}ftsmodelle k{\"o}nnen auf Daten aufsetzen, die in IoT-Anwendungsf{\"a}llen erzeugt werden. Zum Beispiel kann ein Telekommunikationsunternehmen Mehrwert sch{\"o}pfen, indem es aus Daten entscheidungsrelevantere Informationen - sogenannte Insights - ableitet, die zur Steigerung der Entscheidungsagilit{\"a}t genutzt werden. Außerdem k{\"o}nnen Insights monetarisiert werden. Die Monetarisierung von Insights kann nur nachhaltig stattfinden, wenn sorgf{\"a}ltig gehandelt wird und Rahmenbedingungen ber{\"u}cksichtigt werden. In diesem Kapitel wird das Konzept informationsgetriebener Gesch{\"a}ftsmodelle erl{\"a}utert und anhand des konkreten Anwendungsfalls Park and Joy verdeutlicht. Dar{\"u}ber hinaus werden Nutzen, Risiken und Rahmenbedingungen diskutiert.}, language = {de} } @article{HillgaertnerPeier2008, author = {Hillg{\"a}rtner, Michael and Peier, Dirk}, title = {Nutzbarkeit bestehender, geschirmter Labore als Modenverwirbelungskammer}, series = {Elektromagnetische Vertr{\"a}glichkeit : EMV 2008, Internationale Fachmesse und Kongress f{\"u}r Elektromagnetische Vertr{\"a}glichkeit, 19. - 21. Februar 2008, Messe D{\"u}sseldorf / Gonschorek, Karl-Heinz}, journal = {Elektromagnetische Vertr{\"a}glichkeit : EMV 2008, Internationale Fachmesse und Kongress f{\"u}r Elektromagnetische Vertr{\"a}glichkeit, 19. - 21. Februar 2008, Messe D{\"u}sseldorf / Gonschorek, Karl-Heinz}, publisher = {VDE-Verl.}, address = {Berlin [u.a.]}, isbn = {978-3-8007-3075-9}, pages = {579 -- 586}, year = {2008}, language = {de} } @article{Zastrow1985, author = {Zastrow, Udo}, title = {Numerical plane stress analysis by integral equations based on the singularity method}, series = {SM archives . 10 (1985)}, journal = {SM archives . 10 (1985)}, isbn = {0376-7426}, pages = {113 -- 128}, year = {1985}, language = {en} } @article{HeuermannThalayasingam2009, author = {Heuermann, Holger and Thalayasingam, K.}, title = {Novel vector non-linear measurement system for intermodulation measurements / Thalayasingam, K.; Heuermann, H.}, series = {European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE}, journal = {European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4244-4748-0}, pages = {926 -- 929}, year = {2009}, language = {en} }