@inproceedings{Chow, author = {Chow, Rosan}, title = {Dewey's Aesthetic, Logic and the Project of our Time}, series = {Dock of Learning: Design von, als \& jenseits von Wissen; Klel; 2014}, booktitle = {Dock of Learning: Design von, als \& jenseits von Wissen; Klel; 2014}, editor = {Chow, Rosan and Sasse, Wolfgang}, publisher = {Muthesius Academy of Fine Arts and Design}, address = {Kiel}, isbn = {978-3-943763-40-9}, pages = {44 -- 49}, abstract = {This paper is based on the talk of the same title delivered at the "Dock of Learning" Symposium. I reflect on design research with an eye on the critical issues of our time. Design research has the potential to take on these issues; however, there are challenges. A threatening one, I see, is the divergence of design research and art research. I attempt to tackle this by examining Jonas' Research through Design and Borgdorff's Artistic Research with help from John Dewey's philosophy.}, language = {en} } @incollection{Chow, author = {Chow, Rosan}, title = {What Should be done with the Different Versions of Research Through Design}, series = {Entwerfen - Wissen - Produzieren: Designforschung im Anwendungskontext}, booktitle = {Entwerfen - Wissen - Produzieren: Designforschung im Anwendungskontext}, editor = {Mareis, Claudia and Joost, Gesche and Kimpel, Kora}, publisher = {transcript Verlag}, isbn = {9783839414637}, doi = {10.1515/transcript.9783839414637}, pages = {145 -- 158}, language = {en} } @article{MennickenPeterKaulenetal., author = {Mennicken, Max and Peter, Sophia Katharina and Kaulen, Corinna and Simon, Ulrich and Karth{\"a}user, Silvia}, title = {Impact of device design on the electronic and optoelectronic properties of integrated Ru-terpyridine complexes}, series = {Beilstein journal of nanotechnology}, volume = {13}, journal = {Beilstein journal of nanotechnology}, publisher = {Beilstein-Institut zur F{\"o}rderung der Chemischen Wissenschaften}, doi = {10.3762/bjnano.13.16}, pages = {219 -- 229}, abstract = {The performance of nanoelectronic and molecular electronic devices relies strongly on the employed functional units and their addressability, which is often a matter of appropriate interfaces and device design. Here, we compare two promising designs to build solid-state electronic devices utilizing the same functional unit. Optically addressable Ru-terpyridine complexes were incorporated in supramolecular wires or employed as ligands of gold nanoparticles and contacted by nanoelectrodes. The resulting small-area nanodevices were thoroughly electrically characterized as a function of temperature and light exposure. Differences in the resulting device conductance could be attributed to the device design and the respective transport mechanism, that is, thermally activated hopping conduction in the case of Ru-terpyridine wire devices or sequential tunneling in nanoparticle-based devices. Furthermore, the conductance switching of nanoparticle-based devices upon 530 nm irradiation was attributed to plasmon-induced metal-to-ligand charge transfer in the Ru-terpyridine complexes used as switching ligands. Finally, our results reveal a superior device performance of nanoparticle-based devices compared to molecular wire devices based on Ru-terpyridine complexes as functional units.}, language = {en} } @book{BusenKnechtelKnoblingetal., author = {Busen, Tobias and Knechtel, Miriam and Knobling, Clemens and Nagel, Elke and Schuller, Manfred and Todt, Birte}, title = {Measured building survey}, publisher = {TUM University Press}, isbn = {978-3-95884-038-6}, doi = {10.14459/2021md1636474}, pages = {108 S.}, abstract = {The precisely measured documentation of historical buildings by means of drawings - the building survey - serves several purposes: it is not only an important part of the scientific study of architecture, but also an essential basis for building measures in existing contexts. It is the only way to undertake well-founded research respectively detailed architectural planning, from structural improvement to conservation and restoration measures. In addition to a historical overview of building surveying as a method, this volume mainly offers practical assistance regarding the different methods for documenting historic buildings - starting from manual methods of measuring up to electronic and computer-aided utilities available today. The content is complemented by many illustrations and examples as well as an introduction to methods, that go beyond the mere graphic documentation and thus represent ways of conducting thorough building examinations. The book offers easy access to the topic of building surveying, both for students as well as for anyone dealing professionally with historic buildings}, language = {en} } @article{Richter, author = {Richter, Stefanie}, title = {Bewohner nehmen an einem Forschungsprojekt zur Verbesserung der Lebensqualit{\"a}t im Alter teil}, series = {KWA Journal}, journal = {KWA Journal}, number = {1}, publisher = {KWA}, address = {Unterhaching}, issn = {1868-5218}, pages = {8}, language = {de} } @book{ScheidVogl, author = {Scheid, Sandro and Vogl, Stefanie}, title = {Data Science: Grundlagen, Methode und Modelle der Statistik}, publisher = {Hanser}, isbn = {978-3-446-46663-0}, doi = {10.3139/9783446470019}, pages = {359}, subject = {Big Data}, language = {de} } @inproceedings{LaumerStichelAmendetal., author = {Laumer, Tobias and Stichel, Thomas and Amend, Philipp and Schmidt, Michael and Gachot, A.}, title = {Simultaneous Energy Deposition for Laser Beam Melting of Polymers}, series = {Proceedings of the Polymer Processing Society 29th Annual Meeting, N{\"u}rnberg, 2013}, booktitle = {Proceedings of the Polymer Processing Society 29th Annual Meeting, N{\"u}rnberg, 2013}, publisher = {American Institute of Physics}, address = {New York}, language = {en} } @misc{KempfBieberCorstenetal., author = {Kempf, Sabrina and Bieber, Claudia and Corsten, Sabine and Lutz-Kopp, Matthias and Heim, Stefan and Lauer, Norina}, title = {Mitbetroffen von Aphasie: Die subjektiv empfundene Lebensqualit{\"a}t der Angeh{\"o}rigen von Menschen mit Aphasie}, series = {Jahrestagung der Gesellschaft f{\"u}r Aphasieforschung und -behandlung (GAB), Tagungsband}, journal = {Jahrestagung der Gesellschaft f{\"u}r Aphasieforschung und -behandlung (GAB), Tagungsband}, address = {Osnabr{\"u}ck}, doi = {10.13140/RG.2.2.20665.77922}, pages = {62 -- 63}, abstract = {Als Systemerkrankung beeinflusst die neurologische Sprachst{\"o}rung Aphasie nicht nur die Betroffenen sondern in vergleichbarem Maße auch die Angeh{\"o}rigen. Es zeigt sich, dass die Lebensqualit{\"a}t der Angeh{\"o}rigen beeintr{\"a}chtigt ist. Ziel der qualitativen Studie ist es, die subjektive Perspektive der Angeh{\"o}rigen auf die eigene Situation n{\"a}her zu betrachten.}, language = {de} } @inproceedings{UlbrichGalkaGuenthner, author = {Ulbrich, Alexander and Galka, Stefan and G{\"u}nthner, Willibald A.}, title = {Secure planning of order picking systems with the aid of simulation}, series = {Proceedings of th 43rd Hawaii International Conference on System Sciences (HICSS), 5-8 Jan. 2010, Koloa, Kauai, Hawaii}, booktitle = {Proceedings of th 43rd Hawaii International Conference on System Sciences (HICSS), 5-8 Jan. 2010, Koloa, Kauai, Hawaii}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-0-7695-3869-3}, issn = {1530-1605}, doi = {10.1109/HICSS.2010.326}, pages = {1 -- 7}, abstract = {Planning a new logistics center is a quite difficult job. Depending on the requirements there are a great number of possible design versions. The planner has to consider not only the present but also the future requirements. Up to now, the planner decides on the basis of experience which system will perform the requested services best. This paper illustrates the redesign of a new order-picking system in industry supported by a simulation tool of our institute designed especially for the rough planning. With the described project the road capability of the applied simulation concept is underlined. Several versions based on the requirements were investigated and evaluated. Key figures are calculated and a recommendation depending on performance and arising expenses is given.}, language = {de} } @inproceedings{DendorferEnglert, author = {Dendorfer, Sebastian and Englert, Carsten}, title = {Forces on a clavicles midshaft fracture and influence of fracture type}, series = {AO Symposium, Regensburg, 2009}, booktitle = {AO Symposium, Regensburg, 2009}, language = {en} } @inproceedings{StadlerCornetMazeasetal., author = {Stadler, Sebastian and Cornet, Henriette and Mazeas, Damien and Chardonnet, Jean-Remy and Frenkler, Fritz}, title = {IMPRO: IMMERSIVE PROTOTYPING IN VIRTUAL ENVIRONMENTS FOR INDUSTRIAL DESIGNERS}, series = {Proceedings of the Design Society: DESIGN Conference 2020}, booktitle = {Proceedings of the Design Society: DESIGN Conference 2020}, publisher = {Cambridge University Press}, doi = {10.1017/dsd.2020.81}, pages = {1375 -- 1384}, abstract = {Computer-Aided Design (CAD) constitutes an important tool for industrial designers. Similarly, Virtual Reality (VR) has the capability to revolutionize how designers work with its increased sense of scale and perspective. However, existing VR CAD applications are limited in terms of functionality and intuitive control. Based on a comparison of VR CAD applications, ImPro, a new application for immersive prototyping for industrial designers was developed. The user evaluations and comparisons show that ImPro offers increased usability, functionality, and suitability for industrial designers.}, language = {de} } @inproceedings{GalkaGuenthnerUlbrich, author = {Galka, Stefan and G{\"u}nthner, Willibald A. and Ulbrich, Alexander}, title = {Planning of order-picking-systems with support of discrete simulation}, series = {Logistics and Supply Chain Management: Deutsch-Russische Perspektiven. Proceedings of the 5th German-Russian Logistics Workshop (DR-LOG10)}, booktitle = {Logistics and Supply Chain Management: Deutsch-Russische Perspektiven. Proceedings of the 5th German-Russian Logistics Workshop (DR-LOG10)}, language = {en} } @article{GalkaKlenkGuenthner, author = {Galka, Stefan and Klenk, Eva Marianne and G{\"u}nthner, Willibald A.}, title = {Einfluss von Artikeleigenschaften auf die Entnahmezeit in Kommissioniersystemen}, series = {Logistics Journal / Proceedings}, journal = {Logistics Journal / Proceedings}, publisher = {WGTL, Wissenschaftliche Gesellschaft f{\"u}r Technische Logistik e. V.}, address = {Stuttgart ; Dortmund}, issn = {2192-9084}, doi = {10.2195/lj_Proc_galka_de_201610_01}, url = {http://nbn-resolving.de/urn:nbn:de:0009-14-44540}, abstract = {Das Kommissionieren z{\"a}hlt zu den arbeitsintensivsten Aufgaben in der Logistik. Aus diesem Grund ist es wichtig, m{\"o}glichst genau die erwarteten Prozesszeiten f{\"u}r diese Aufgabe zu bestimmen. Ein verbreiteter Ansatz f{\"u}r die Bestimmung von Prozesszeiten f{\"u}r manuelle T{\"a}tigkeiten beim Kommissionieren ist die Methods-Time-Measurement (MTM). Um eine Vorgabezeit mittels MTM zu bestimmen, m{\"u}ssen Einflussfaktoren spezifiziert werden. Dieser Beitrag zeigt anhand der Greifzeit auf, wie diese Einfluss-faktoren auf Grundlage von Artikelstammdaten bestimmt werden k{\"o}nnen. Weiterhin wird der Unterschied zwischen einer f{\"u}r jeden Artikel individuell bestimmten Greifzeit und der Greifzeit basierend auf repr{\"a}sentativen Eigenschaften von Artikelgruppen verglichen. Wesentlich wird dabei die mittels MTM bestimmte Greifzeit durch das Gewicht und die Abmessungen (Sperrigkeit) beeinflusst.}, language = {de} } @article{GalkaRammelmeierGuenthner, author = {Galka, Stefan and Rammelmeier, Tobias and G{\"u}nthner, Willibald A.}, title = {Fehlervermeidung in der kommissionierung}, series = {Logistics Journal}, journal = {Logistics Journal}, publisher = {WGTL, Wissenschaftliche Gesellschaft f{\"u}r Technische Logistik e. V.}, address = {Stuttgart ; Dortmund}, issn = {2192-9084}, doi = {10.2195/lj_Proc_rammelmeier_de_201210_01}, url = {http://nbn-resolving.de/urn:nbn:de:0009-14-34494}, pages = {1 -- 8}, abstract = {Manuelle Kommissioniersysteme sind aufgrund ihrer Flexibilit{\"a}t weit verbreitet, jedoch treten bei diesen auch vermehrt Kommissionierfehler auf, die weitreichende Folgen haben k{\"o}nnen. Deshalb werden zu Beginn des Beitrags die Auswirkungen und Ursachen von Kommissionierfehlern betrachtet. Der Fokus des Beitrags liegt auf der Darlegung von M{\"o}glichkeiten zur Fehlervermeidung. Dabei wird ein ganzheitlicher Ansatz verfolgt, der Maßnahmen aus den Handlungsfeldern Technik, Prozess, Organisation und Motivation umfasst. Als Ausblick auf zuk{\"u}nftige technische Hilfsmittel zur Fehlervermeidung wird das Augmented-Reality-unterst{\"u}tzte System Pick-by-Vision aus der Forschung vorgestellt, das wesentliche Vorteile existierender Techniken der Informationsbereitstellung vereinigt.}, language = {en} } @inproceedings{JonasChowBrediesetal., author = {Jonas, Wolfgang and Chow, Rosan and Bredies, Katharina and Vent, Kathrin}, title = {Far Beyond Dualisms in Methodology - An Integrative Design Research Medium MAPS}, series = {Design \& Complexity - Proceedings of the Design Research Society Conference (DRS 2010), Montreal, 7 - 9 July, 2010}, booktitle = {Design \& Complexity - Proceedings of the Design Research Society Conference (DRS 2010), Montreal, 7 - 9 July, 2010}, editor = {Durling, David and Chen, Lin-Lin and Poldma, T. and Roworth-Stokes, S. and Stolterman, E.}, publisher = {DRS Digtial Library}, address = {Montreal, Canada}, isbn = {978-2-9811985-2-5}, pages = {684}, abstract = {Design research is an academic issue and increasingly a success factor for industrial,organizational and social innovation. Efficient methodical support is crucial. The fiercerejection of 1st generation design methods in the early 1970s resulted in thepostmodernist attitude of "no methods", and subsequently in the strong adoption ofscientific ways of thinking for design research. The situation regarding methodologyhas been characterized by unproductive dualisms such as scientific vs. designerlymethods, normative vs. descriptive methods, research vs. design. The potential of theearly (1st generation) methods is neglected and the practical usefulness of designresearch is impeded. The suggestion for 2nd generation methods, conceived asdiscursive instruments, as discussed by Rittel and others has hardly been taken up indesign. The development of MAPS is aimed at the support of practice-oriented design,innovation and research processes. The long-term aim is the development of anintegrated knowledge and communication platform for research through design. MAPSis based upon the idea of a productive reconciliation of the strong dualisms between"scientific" and "designerly" modes of inquiry and supports the emerging concept ofdesign thinking. The paper reports on the ongoing research and development processfrom MAPS1.0 towards MAPS2.0 and beyond.}, language = {en} } @article{Brandstetter, author = {Brandstetter, Manuela}, title = {Wirkungsfeststellung in der Sozialen Arbeit}, series = {Deutsches Zentralinstitut f{\"u}r Soziale Fragen}, journal = {Deutsches Zentralinstitut f{\"u}r Soziale Fragen}, number = {7}, editor = {Wagner, Raphael and Kerzendorfer, Simone}, publisher = {Nomos elibrary}, address = {Berlin}, doi = {10.5771/0490-1606-2018-7-262}, pages = {262 -- 268}, abstract = {In verschiedenen Feldern der Sozialen Arbeit in {\"O}sterreich wird durch soziometrische Leistungsbeschreibungen starker Druck ausge{\"u}bt. Dieser soziale Druck wird nicht erst seit der „Global Third Way Debate" (Giddens 1999) diskutiert und steht im Fokus dieses Beitrags. Paradoxe Effekte, welche die eigentlichen Wirkungen geleisteter Hilfen beeintr{\"a}chtig sowie m{\"o}gliche Exit-Strategien werden unter Bezug auf die Erkenntnisse aus zwei ideal-typischen Evaluierungsstudien dargelegt.}, subject = {Wirkungsanalyse, Evaluation}, language = {de} } @article{KlenkGalka, author = {Klenk, Eva Marianne and Galka, Stefan}, title = {Analysis of real-time tour building and scheduling strategies for in-plant milk-run systems with volatile transportation demand}, series = {IFAC - PapersOnLine}, volume = {52}, journal = {IFAC - PapersOnLine}, number = {13}, publisher = {Elsevier}, doi = {10.1016/j.ifacol.2019.11.517}, pages = {2110 -- 2115}, abstract = {In modern manufacturing systems, milk run (MR) systems represent route-based, cyclic material-handling systems that are used widely and enable frequent deliveries of containerized parts in small lot sizes from a central storage area to multiple points of use on the factory floor. Usually, deliveries take place at predetermined, constant time intervals. As in real-world MR systems, the number of containers to deliver in each interval varies in the short term, peaks in the number of deliveries may lead to capacity bottlenecks and late deliveries. In this paper, we develop three alternative strategies to determine starting times of MR cycles in real-time based on the current number of delivery orders in the system aiming to better handle variations in the number of orders. We evaluate the three strategies for different system load scenarios with respect to delivery service levels, order lead times, systems utilization and necessary number of MR trains using a discrete-event simulation model.}, language = {en} } @misc{KempfBieberCorstenetal., author = {Kempf, Sabrina and Bieber, Claudia and Corsten, Sabine and Lutz-Kopp, Matthias and Heim, Stefan and Lauer, Norina}, title = {Mitbetroffen von Aphasie: Die subjektiv empfundene Lebensqualit{\"a}t der Angeh{\"o}rigen von Menschen mit Aphasie}, series = {Jahrestagung des Deutschen Bundesverbands f{\"u}r Logop{\"a}die, Mainz}, journal = {Jahrestagung des Deutschen Bundesverbands f{\"u}r Logop{\"a}die, Mainz}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-8661}, pages = {49}, language = {de} } @inproceedings{EnglertMuellerDendorfer, author = {Englert, Carsten and M{\"u}ller, F. and Dendorfer, Sebastian}, title = {Einfluss der Muskelkr{\"a}fte, des Bewegungsausmaßes und der Bruchform auf die Kraft{\"u}bertragung des Implantat-Knochenverbundes am Beispiel der Claviculafraktur im mittleren Drittel}, series = {17. Jahreskongress der Deutschen Vereinigung f{\"u}r Schulter- und Ellenbogenchirurgie (DVSE), Rosenheim 2010}, booktitle = {17. Jahreskongress der Deutschen Vereinigung f{\"u}r Schulter- und Ellenbogenchirurgie (DVSE), Rosenheim 2010}, abstract = {Fragestellung Es soll in dieser Computersimulationsstudie untersucht werden, wie der Osteosyntheseverbund Platte mit Schrauben im Verbund mit einer im mittleren Drittel gebrochenen Clavicula durch das Bewegungsausmaß in vivo belastet ist. Was sind die grundlegenden Kr{\"a}fte die auf Clavicula und Implantat wirken und welchen Einfl uss hat die Bruchform. Methodik Die Muskel- und Gelenkkr{\"a}fte sowie die Belastung des Implantatverbundes wurden mit einer muskuloskelletalen Simulationssoftware (AnyBody Technology, V.4) berechnet. Hierf{\"u}r wurden mit einem komplexen Model des menschlichen K{\"o}rpers folgende Bewegungen analysiert: eine Flexion von 160° und Abduktion 160° mit einem Gewicht von 2 kg in der Hand. Aus CT-Patientendaten wurden zwei dreidimensionale Modelle des Clavicula-Implantat Verbundes gebildet, die sich in der Frakturform unterscheiden (Querfraktur und vertikale Fraktur). In beiden Modellen wurde eine Claviculaosteosynthese in superiorer Position mit einer 6 Loch LCP mit 2 Schrauben pro Hauptfragment verwendet. Die Materialeigenschaften wurden aus der Dichte des Materials sowie aus Literaturdaten verwendet. Die Muskel- und Gelenkkr{\"a}fte aus der muskuloskelletalen Berechnung wurden auf das Finite Elemente Modell {\"u}bertragen und die Spannungen und Dehnungen des Implantat-Knochenverbundes wurden berechnet. Ergebnisse Es zeigte sich, dass die simulierte in vivo Belastung stark abh{\"a}ngig vom Flexionswinkel ist. Das Implantat ist in der superioren Lage auf Biegung belastet, welche maximale Werte im {\"U}berschulterniveau erreicht. Die Bruchform mit anatomischer Reposition und Kontakt der Hauptfragmente zueinander f{\"u}hrt zu einer deutlichen Entlastung des Osteosyntheseverbundes im Vergleich zu einer Bruchform mit vertikaler Fraktur. Schlussfolgerung Aus den Analysen ist eine Positionierung der Plattenosteosynthese f{\"u}r die im mittleren Drittel frakturierte Clavicula in anterior-superiorer Lage w{\"u}nschenswert. Die anatomische Reposition entlastet den Osteosyntheseverbund und sollte m{\"o}glichst erreicht werden. Die Nachbehandlung sollte ein Bewegungsausmaß f{\"u}r den Arm f{\"u}r 4 Wochen f{\"u}r einfache Bruchformen auf 70° Flexion und Abduktion limitieren und f{\"u}r komplexe Bruchformen diese Limitierung ausgedehnt werden.}, language = {de} } @incollection{BoerschSupanDuezguenWeiss, author = {B{\"o}rsch-Supan, Axel and D{\"u}zg{\"u}n, Ismail and Weiss, Matthias}, title = {Labor Productivity in an Aging Society}, series = {Frontiers in Pension Finance}, booktitle = {Frontiers in Pension Finance}, editor = {Broeders, Dirk and Eijffinger, Sylvester C.W. and Houben, Aerdt}, publisher = {Edward Elgar}, address = {Cheltenham}, doi = {10.4337/9781847209924.00013}, pages = {83 -- 98}, abstract = {How to deliver adequate pension benefits at reasonable costs is a huge challenge confronting our ageing societies. This book delivers a comprehensive overview of the latest insights into pension finance, pension system design, pension governance and risk based supervision. It combines state-of-the-art analyses with innovative policy proposals to increase the efficiency and resilience of pension systems and to advance these systems' contribution to global financial stability. Renowned pension experts offer cutting-edge guidance for future decision making and the development of best practices. This exciting exploration of the frontiers in pension finance highlights key aspects of securing long term retirement provisions.}, language = {en} } @book{LiebKlenkGalkaetal., author = {Lieb, Christian and Klenk, Eva Marianne and Galka, Stefan and Keuntje, Christopher}, title = {Einsatz von Routenzugsystemen zur Produktionsversorgung : Studie zu Planung Steuerung und Betrieb}, publisher = {fml - Lehrstuhl f{\"u}r F{\"o}rdertechnik Materialfluß Logistik Technische Universit{\"a}t M{\"u}nchen}, address = {Garching b. M{\"u}nchen}, isbn = {978-3-941702-79-0}, language = {de} } @article{Galka, author = {Galka, Stefan}, title = {Operating strategies for in-plant milk-run systems}, series = {IFAC-Papers OnLine}, volume = {48}, journal = {IFAC-Papers OnLine}, number = {3}, publisher = {Elsevier}, address = {Frankfurt}, doi = {10.1016/j.ifacol.2015.06.361}, pages = {1882 -- 1887}, abstract = {In-plant milk-run systems are transportation systems, where materials are delivered from a central storage area to several points of use on defined routes and in short intervals. Milk-run systems generally enable frequent deliveries in smaller lot sizes with short lead times and low inventory at the points of use. In real milk-run systems, the number of deliveries per interval varies due to, e.g., variations in the production program. To enable efficient and stable milk-run system operations, these systems therefore must be able to cope with peaks in the number of deliveries. We develop different strategies for handling these delivery peaks and evaluate them with respect to delivery cost, lead time and service level using real material consumption data from two large companies from the automotive industry.}, language = {en} } @inproceedings{GalkaKlenkGuenthner, author = {Galka, Stefan and Klenk, Eva Marianne and G{\"u}nthner, Willibald A.}, title = {Planning of production supermarkets for production supply}, series = {Proceedings of 2013 IEEE International Conference on Service Operations and Logistics, and Informatics, 28-30 July 2013, Dongguan, China}, booktitle = {Proceedings of 2013 IEEE International Conference on Service Operations and Logistics, and Informatics, 28-30 July 2013, Dongguan, China}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4799-0530-0}, doi = {10.1109/SOLI.2013.6611458}, pages = {456 -- 461}, abstract = {Production supermarkets are a system to ensure high-frequency, demand-oriented, in-plant production supply with low lot sizes. The paper presents methods to design and dimension these systems using qualitative design criteria and quantitative approaches based on well-known analytical methods for conventional order picking systems. The methods help to design layout, provision type and path strategy and to derive space consumption and the number of supermarket employees required to fulfill a defined demand.}, language = {de} } @article{GalkaKlenkGuenthner, author = {Galka, Stefan and Klenk, Eva Marianne and G{\"u}nthner, Willibald A.}, title = {Potenziale einer flexiblen Routenzugsteuerung: Strategien zum besseren Umgang mit schwankenden Transportbedarfen}, series = {Zeitschrift fuer Wirtschaftlichen Fabrikbetrieb : ZWF}, volume = {110}, journal = {Zeitschrift fuer Wirtschaftlichen Fabrikbetrieb : ZWF}, number = {12}, publisher = {de Gruyter}, address = {Berlin}, issn = {2511-0896}, doi = {10.3139/104.111444}, pages = {805 -- 809}, language = {de} } @incollection{Galka, author = {Galka, Stefan}, title = {Planung und Auswahl von Kommissioniersystemen}, series = {MTM in einer globalisierten Wirtschaft : Arbeitsprozesse systematisch gestalten und optimieren}, booktitle = {MTM in einer globalisierten Wirtschaft : Arbeitsprozesse systematisch gestalten und optimieren}, editor = {Britzke, Bernd}, publisher = {mi-Wirtschaftsbuch Finanzbuch-Verl.}, address = {M{\"u}nchen}, isbn = {978-3-86880-091-3}, pages = {201 -- 220}, language = {de} } @article{SokolowskiTintenBlomeBlumsetal., author = {Sokolowski-Tinten, Klaus and Blome, Christian and Blums, Juris and Dietrich, Clemens and Tarsevitch, Alexander and Horn-von Hoegen, Michael and von der Linde, Dietrich and Cavalleri, Andrea and Kammler, Martin and Uschmann, Ingo and Foerster, Eckhart}, title = {Femtosecond X-ray Diffraction Study of Large Amplitude Coherent Optical Phonons in Laser-Excited Bismuth}, series = {Conference on Lasers and Electro-Optics, 1-6 June 2003, Baltimore, Maryland}, journal = {Conference on Lasers and Electro-Optics, 1-6 June 2003, Baltimore, Maryland}, publisher = {Optical Society of America}, abstract = {Femtosecond time-resolved X-ray diffraction was used to directly study optical phonons in laser-excited Bismuth. A periodic modulation of the diffraction efficiency reveals initially coherent lattice distortions with atomic displacements of nearly 10\% of the nearest- neighbor-distance.}, language = {en} } @article{WallKrenzerWippermannetal., author = {Wall, Simone and Krenzer, Boris and Wippermann, Stefan and Sanna, Simone and Klasing, Friedrich and Hanisch-Blicharski, Anja and Kammler, Martin and Schmidt, Wolf Gero and Horn-von Hoegen, Michael}, title = {Atomistic picture of charge density wave formation at surfaces}, series = {Physical review letters}, volume = {109}, journal = {Physical review letters}, number = {18}, publisher = {APS}, doi = {10.1103/PhysRevLett.109.186101}, abstract = {We used ultrafast electron diffraction and density-functional theory calculations to gain insight into the charge density wave (CDW) formation on In/Si(111). Weak excitation by a femtosecond-laser pulse results in the melting of the CDW. The immediate freezing is hindered by a barrier for the motion of atoms during the phase transition: The melted CDW constitutes a long-lived, supercooled phase and is strong evidence for a first-order transition. The freezing into the CDW is triggered by preexisting adsorbates. Starting at these condensation nuclei, the CDW expands one dimensionally on the In/Si(111) surface, with a constant velocity of more than 80 m/s.}, language = {en} } @article{MoellenbeckHanischBlicharskiSchneideretal., author = {M{\"o}llenbeck, Simone and Hanisch-Blicharski, Anja and Schneider, Paul and Ligges, Manuel and Zhou, Ping and Kammler, Martin and Krenzer, Boris and Horn-von Hoegen, Michael}, title = {Ultra-fast Time-Resolved Electron Diffraction of Strongly Driven Phase Transitions on Silicon Surfaces}, series = {MRS Online Proceedings Library}, journal = {MRS Online Proceedings Library}, publisher = {Springer}, doi = {10.1557/PROC-1230-MM03-09}, abstract = {The dynamics of strongly driven phase transitions at surfaces are studied by ultra-fast time-resolved reflection high energy electron diffraction. The surfaces are excited by an intense fs-laser pulse (pump) and probed by an ultra-short electron pulse with variable time delay. The order-disorder phase transition from a c(4 {\~A}— 2) to a(2 {\~A}— 1) of the bare Si(001) surface shows a transient decrease of the intensity of the c(4 {\~A}— 2) spots which recovers on a time scale of a few hundred picoseconds indicating the excitation of the phase transition. On Si(111) a monolayer of Indium induces a (4 {\~A}— 1) reconstruction which undergoes a Peierls like phase transition to a (8 {\~A}— "2") reconstruction below 100 K. Upon laser excitation with a fluence of 3.4 mJ/cm 2 at a temperature of 72 K the phase transition was strongly driven. The (8 {\~A}— "2")-diffraction spots instantaneously disappears, while the intensity of the (4 {\~A}— 1)-spots increases. This increase of the (4 {\~A}— 1) spot intensity excludes an explanation by the Debye-Waller-Effect and is evidence for a true structural phase transition at a surface. {\^A}© 2010 Materials Research Society.}, language = {en} } @article{LuNicoulShymanovichetal., author = {Lu, Wei and Nicoul, Matthieu and Shymanovich, Uladzimir and Tarsevitch, Alexander and Kammler, Martin and Horn-von Hoegen, Michael and von der Linde, Dietrich and Sokolowski-Tinten, Klaus}, title = {Extreme Phonon Softening in Laser-excited Bismuth - Towards an Inverse Peierls-transition}, series = {MRS Online Proceedings Library}, volume = {1230}, journal = {MRS Online Proceedings Library}, publisher = {Springer}, doi = {10.1557/PROC-1230-MM03-05}, abstract = {Large amplitude coherent optical phonons have been investigated in laser-excited Bismuth by means of femtosecond time-resolved X-ray diffraction. For absorbed laser fluences above 2 mJ/cm2, the experimental data reveal an extreme softening of the excited A1g-mode down to frequencies of about 1 THz, only 1/3 of the unperturbed A1g-frequency. At even stronger excitation the measured diffraction signals no longer exhibit an oscillatory behavior presenting strong indication that upon intense laser-excitation the Peierls-distortion, which defines the equilibrium structure of Bismuth, can be transiently reversed.}, language = {en} } @article{HanischBlicharskiKrenzerMoellenbecketal., author = {Hanisch-Blicharski, Anja and Krenzer, Boris and M{\"o}llenbeck, Simone and Ligges, Manuel and Zhou, Ping and Kammler, Martin and Horn-von Hoegen, Michael}, title = {Transient Cooling of Ultrathin Epitaxial Bi(111)-Films on Si(111) Upon Femtosecond Laser Excitation Studied by Ultrafast Reflection High Energy Electron Diffraction}, series = {MRS Online Proceedings Library}, journal = {MRS Online Proceedings Library}, publisher = {Springer}, doi = {10.1557/PROC-1172-T04-08}, pages = {1 -- 6}, abstract = {With time resolved ultrafast electron diffraction the cooling process across the interface between a thin film and the underlying substrate was studied after excitation with short laser pulses. From the exponential decay of the surface temperature evolution a thermal boundary conductance of 1430 W/(cm2K) is determined for a 9.7 nm thin Bi(111) film on Si(111). A linear dependence between laser fluence and initial temperature rise was measured for film-thicknesses between 2.5 nm and 34.5 nm. The ratio of initial temperature rise and laser fluence for different film-thicknesses is compared to a model taking multilayer optics into account. The data agree well with this model.}, language = {en} } @article{AlFalouKammlerHornvonHoegen, author = {Al-Falou, A. A. and Kammler, Martin and Horn-von Hoegen, Michael}, title = {Strain state analysis of hetero-epitaxial systems}, series = {Europhysics Letters}, volume = {69}, journal = {Europhysics Letters}, number = {4}, publisher = {IOP}, doi = {10.1209/epl/i2004-10399-6}, pages = {570 -- 576}, abstract = {We present a new method to analyze the strain state of epitaxial hetero structures by high-resolution spot profile analysis low-energy electron diffraction. From the variation of the spot profiles with the vertical scattering vector we determine the hetero film roughness, the change of interlayer spacing due to tetragonal distortion, and the variation of the interlayer distance due to partial relaxation of the strained rough film. The practical implementation of this method is simple and can be used to determine the onset of strain-relieving defects during the growth process.}, language = {en} } @article{KammlerHornvonHoegen, author = {Kammler, Martin and Horn-von Hoegen, Michael}, title = {Low energy electron diffraction of epitaxial growth of bismuth on Si(111)}, series = {Surface Science}, volume = {576}, journal = {Surface Science}, number = {1-3}, publisher = {Elsevier}, doi = {10.1016/j.susc.2004.11.033}, pages = {56 -- 60}, abstract = {The epitaxial growth of Bi on Si(1 1 1) studied by spot profile analyzing low energy electron diffraction shows for low coverage rotationally disordered Bi cluster with preferred orientations following the threefold symmetry of the Si substrate. With further deposition the Bi cluster coalesces and the surface orientation changes from the pseudo cubic Bi(1 1 0) surface orientation of the Bi cluster into the hexagonal Bi(1 1 1) surface of the resulting Bi film.}, language = {en} } @inproceedings{SidersCavalleriTothetal., author = {Siders, C. W. and Cavalleri, Andrea and T{\´o}th, Csaba and Wilson, K. R. and Squier, Jeff A. and Barty, C. P. J. and Kammler, Martin and Sokolowski-Tinten, Klaus and Horn-von Hoegen, Michael and von der Linde, D.}, title = {Femtosecond X-ray diffraction of short-pulse irradiated semiconductors}, series = {Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 24-24 May 2002, Long Beach, CA, USA}, booktitle = {Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 24-24 May 2002, Long Beach, CA, USA}, publisher = {IEEE}, doi = {10.1109/CLEO.2002.1033997}, pages = {297 -- 298}, abstract = {Summary form only given, as follow. Ultrafast optical-pump, X-ray diffraction probe experiments are providing new ways to study transient processes including the direct observation of the atomic motion by which many solid-state processes and chemical and biochemical reactions take place. Current table-top-terawatt femtosecond laser systems provide an attractive source of few-hundred femtosecond duration bursts of angstrom-scale X-ray radiation with fluxes comparable to standard rotating anode sources. Their compact size enables time resolved structural dynamics to be studied in the small laboratory with temporal resolution better than typical molecular vibrational periods. Ultrafast structural dynamics in crystalline samples are readily studied with such systems and experiments to be discussed in this talk include ultrafast non-thermal solid-to-liquid transition in thin single-crystal Ge-111 films grown on Si-111 substrates; ultrafast non-thermal solid-to-solid transitions in bulk vanadium dioxide from a low temperature insulating phase to a high temperature metallic phase; and harmonic and anharmonic coherent acoustic dynamics in layered Ge-111/Si-111 and bulk GaAs-111 samples. Future improvements in high-average power short-pulse lasers will enable the study of a wider class of materials such as amorphous solids or liquid-phase dynamics of simple molecules, while proposed 4th generation light sources based upon single-pass X-ray free-electron lasers will permit singleshot structural determination of complex biomolecules.}, language = {en} } @article{SokolowskiTintenBlomeBlumsetal., author = {Sokolowski-Tinten, Klaus and Blome, Christian and Blums, Juris and Cavalleri, Andrea and Dietrich, Clemens and Tarasevitch, Alexander and Uschmann, Ingo and F{\"o}rster, Eckhard and Kammler, Martin and Horn-von Hoegen, Michael and von der Linde, Dietrich}, title = {Femtosecond X-ray measurement of coherent lattice vibrations near the Lindemann stability limit}, series = {Nature}, volume = {422}, journal = {Nature}, number = {6929}, publisher = {Springer}, doi = {10.1038/nature01490}, pages = {287 -- 289}, abstract = {The study of phase-transition dynamics in solids beyond a time-averaged kinetic description requires direct measurement of the changes in the atomic configuration along the physical pathways leading to the new phase. The timescale of interest is in the range 10(-14) to 10(-12) s. Until recently, only optical techniques were capable of providing adequate time resolution, albeit with indirect sensitivity to structural arrangement. Ultrafast laser-induced changes of long-range order have recently been directly established for some materials using time-resolved X-ray diffraction. However, the measurement of the atomic displacements within the unit cell, as well as their relationship with the stability limit of a structural phase, has to date remained obscure. Here we report time-resolved X-ray diffraction measurements of the coherent atomic displacement of the lattice atoms in photoexcited bismuth close to a phase transition. Excitation of large-amplitude coherent optical phonons gives rise to a periodic modulation of the X-ray diffraction efficiency. Stronger excitation corresponding to atomic displacements exceeding 10 per cent of the nearest-neighbour distance-near the Lindemann limit-leads to a subsequent loss of long-range order, which is most probably due to melting of the material.}, language = {en} } @article{HildSeifertKammleretal., author = {Hild, R. and Seifert, C. and Kammler, Martin and Meyer zu Heringdorf, Frank-Joachim and Horn-von Hoegen, Michael and Zhachuk, R.A and Olshanetsky, B.Z}, title = {Kinetics of Au induced faceting of vicinal Si(111)}, series = {Surface Science}, volume = {512}, journal = {Surface Science}, number = {1-2}, publisher = {Elsevier}, doi = {10.1016/S0039-6028(02)01666-7}, pages = {117 -- 127}, abstract = {Au induced faceting of vicinal Si(1 1 1) has been studied during adsorption at elevated temperature by spot profile analyzing of low energy electron diffraction and after quenching to room temperature by scanning tunneling microscopy. On the surfaces inclined towards five different types of facets form with increasing Au coverage at adsorption temperatures Tads below 800 °C. They are (4 4 3), (7 7 5), (5 5 3), a stepped (2 2 1), and the (3 3 1) facets. Atomic models for the (5 5 3) and (7 7 5) facet planes are proposed on the basis of high resolution STM images. At C we found the formation of an ordered step train which covers the entire surface. With further increasing Au coverage the stepped surface decomposes again into (1 1 1) terraces and step bunches. Driving force is the formation of the Si(1 1 1)-(5×2)-Au reconstruction.}, language = {en} } @article{SokolowskiTintenHornvonHoegenvonderLindeetal., author = {Sokolowski-Tinten, Klaus and Horn-von Hoegen, Michael and von der Linde, D. and Cavalleri, Andrea and Siders, C. W. and Brown, F. L. H. and Leitner, D. M. and T{\´o}th, Csaba and Squier, Jeff A. and Barty, C. P. J. and Wilson, K. R. and Kammler, Martin}, title = {Transient lattice dynamics in fs-laser-excited semiconductors probed by ultrafast X-ray diffraction}, series = {Journal de Physique IV}, volume = {11}, journal = {Journal de Physique IV}, number = {Pr2}, publisher = {EDP}, doi = {10.1051/jp4:2001290}, pages = {473 -- 477}, abstract = {A study of lattice dynamics in fs-laser-excited crystalline bulk Ge and Ge/Si-heterostructures, using time-resolved x-ray diffraction, was presented. Fast energy transport deep into the bulk of the material, coherent acoustic phonon dynamics, lattice anharmonicity, and vibrational transport across a buried interfaces were observed. Graphs showing time-dependent shifts of the centroid of the measured rocking curves in the Ge-overlayer and in the Si-substrate for different fluences, were presented.}, language = {en} } @article{SokolowskiTintenCavalleriSidersetal., author = {Sokolowski-Tinten, Klaus and Cavalleri, Andrea and Siders, C. W. and Brown, F. L. H. and Leitner, D. M. and T{\´o}th, Csaba and Kammler, Martin and Horn-von Hoegen, Michael and von der Linde, D. and Squier, Jeff A. and Barty, C. P. J. and Wilson, K. R.}, title = {Time-resolved x-ray diffraction study of ultrafast acoustic phonon dynamics in Ge/Si-heterostructures}, series = {Chemical Physics}, volume = {66}, journal = {Chemical Physics}, publisher = {Springer}, doi = {10.1007/978-3-642-56546-5_81}, pages = {281 -- 283}, abstract = {Using time-resolved x-ray diffraction the ultafast strain dynamics in fs-laserexcited Ge/Si-heterostructures has been studied. A fluence dependent, anharmonic damping of the impulsively generated acoustic phonons and vibrational transport across the buried Ge/Si-interface are observed.}, language = {en} } @inproceedings{SokolowskiTintenBlomeDietrichetal., author = {Sokolowski-Tinten, Klaus and Blome, Christian and Dietrich, Clemens and Blums, Juris and Horn-von Hoegen, Michael and von der Linde, D. and Cavalleri, Andrea and Squier, Jeff A. and Kammler, Martin}, title = {Structural dynamics in laser-excited solids investigated with femtosecond x-ray diffraction}, series = {2002 Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, 19-24 May 2002, Long Beach, CA, USA}, booktitle = {2002 Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, 19-24 May 2002, Long Beach, CA, USA}, publisher = {IEEE}, doi = {10.1109/QELS.2002.1031182}, pages = {115 -- 116}, abstract = {Summary form only given. Ultrashort x-ray pulses offer a unique combination of atomic-scale spatial and temporal resolution, which permits direct measurements of structural transients on an ultrafast time scale. Using time-resolved X-ray diffraction with femtosecond, multi-keV X-ray pulses we have studied transient lattice dynamics in optically excited semiconductors.}, language = {en} } @article{SokolowskiTintenBlomeDietrichetal., author = {Sokolowski-Tinten, Klaus and Blome, Christian and Dietrich, Clemens and Tarasevitch, A. and Horn-von Hoegen, Michael and von der Linde, D. and Cavalleri, Andrea and Squier, Jeff A. and Kammler, Martin}, title = {Femtosecond x-ray measurement of ultrafast melting and large acoustic transients}, series = {Physical review letters}, volume = {87}, journal = {Physical review letters}, publisher = {APS}, doi = {10.1103/PhysRevLett.87.225701}, abstract = {Time-resolved x-ray diffraction with ultrashort ( approximately 300 fs), multi-keV x-ray pulses has been used to study the femtosecond laser-induced solid-to-liquid phase transition in a thin crystalline layer of germanium. Nonthermal melting is observed to take place within 300-500 fs. Following ultrafast melting we observe strong acoustic perturbations evolving on a picosecond time scale.}, language = {en} } @article{SokolowskiTintenBlomeDietrichetal., author = {Sokolowski-Tinten, Klaus and Blome, Christian and Dietrich, Clemens and Tarasevitch, A. and Horn-von Hoegen, Michael and von der Linde, D. and Cavalleri, Andrea and Squier, Jeff A. and Kammler, Martin}, title = {Femtosecond time-resolved X-ray diffraction study of ultrafast structural dynamics in laser-excited solids}, series = {International Conference on Ultrafast Phenomena, 12 May 2002, Vancouver Canada}, volume = {71}, journal = {International Conference on Ultrafast Phenomena, 12 May 2002, Vancouver Canada}, publisher = {Optica Publishing Grou}, doi = {10.1007/978-3-642-59319-2_10}, pages = {36 -- 38}, abstract = {Time-resolved x-ray diffraction with sub-300 fs, multi-keV x-ray pulses was used to study ultrafast lattice dynamics in laser-irradiated germanium and bismuth. In bismuth strong excitation of optical phonons is observed prior to disordering of the material.}, language = {en} } @unpublished{TringidesConradMenzeletal.2002, author = {Tringides, Michael C. and Conrad, E. H. and Menzel, Andreas and Voss, Neil R. and Kammler, Martin and Horn-von Hoegen, Michael}, title = {Dynamics of atomic steps on Si(001) studied by temporal LEED spectroscopy [Poster]}, year = {2002}, abstract = {While surface kinetics measurements for single atom diffusion have proliferated, little work exists attempting to measure surface dynamics under equilibrium conditions. We will present our recent work on developing Temporal LEED Spectroscopy (TLS) as a dynamic probe of surfaces capable of kinetics measurements at both high temperatures and surface coverages. By tuning the diffraction to specific structural entities such as steps, islands, etc., and monitoring the diffracted signal as a function of time, dynamics information about these structures can be obtained. As an example we will present TLS results for the dynamics of step fluctuations on Si(001) [1]. We have measured activation energies and identified step-edge diffusion as the rate limiting process for 950K < T < 1130K. Although this result is in apparent disagreement with earlier work, a careful analysis, considering crossover temperatures between different microscopic processes, can reconcile the differences. 1. M. Kammler, et al., Phys. Rev. B (in press).}, language = {en} } @article{HornvonHoegenMeyerzuHeringdorfKammleretal., author = {Horn-von Hoegen, Michael and Meyer zu Heringdorf, Frank-Joachim and Kammler, Martin and Schaeffer, C. and Reinking, D. and Hofmann, K. R.}, title = {Bi surfactant mediated epitaxy of Ge on Si(111)}, series = {Thin Solid Films}, volume = {343-344}, journal = {Thin Solid Films}, publisher = {Elsevier}, doi = {10.1016/S0040-6090(98)01659-9}, pages = {579 -- 582}, abstract = {We have tested Bi for the surfactant mediated epitaxy of Ge on Si(111). Islanding of Ge is prevented and a 2D layer growth of smooth and continuous Ge films is observed. The lattice mismatch is accommodated by a periodic array of dislocations confined to the Si/Ge interface. The large covalent radius of Bi reduces the binding energy, allowing Very efficient segregation and low doping levels even at low growth temperatures. Unfortunately, this results also in a high Bi desorption flux limiting the possible growth temperatures below 600 degrees C. Consequently the Ge films show a high defect density in the order of 10(8) cm(-2) for stacking faults and 10(9) cm(-2) for dislocations which limit electron Hall mobility to values below 700 cm(2)/V s at room temperature.}, language = {en} } @article{CavalleriSidersBrownetal., author = {Cavalleri, Andrea and Siders, C. W. and Brown, F. L. H. and Leitner, D. M. and T{\´o}th, Csaba and Squier, Jeff A. and Barty, C. P. J. and Wilson, K. R. and Sokolowski-Tinten, Klaus and Horn-von Hoegen, Michael and von der Linde, D. and Kammler, Martin}, title = {Anharmonic lattice dynamics in germanium measured with ultrafast x-ray diffraction}, series = {Physical review letters}, volume = {85}, journal = {Physical review letters}, number = {3}, publisher = {APS}, doi = {10.1103/PhysRevLett.85.586}, pages = {586 -- 589}, abstract = {Damping of impulsively generated coherent acoustic oscillations in a femtosecond laser-heated thin germanium film is measured as a function of fluence by means of ultrafast x-ray diffraction. By simultaneously measuring picosecond strain dynamics in the film and in the unexcited silicon substrate, we separate anharmonic damping from acoustic transmission through the buried interface. The measured damping rate and its dependence on the calculated temperature of the thermal bath is consistent with estimated four-body, elastic dephasing times (T2) for 7-GHz longitudinal acoustic phonons in germanium.}, language = {en} } @article{SokolowskiTintenHornvonHoegenvonderLindeetal., author = {Sokolowski-Tinten, Klaus and Horn-von Hoegen, Michael and von der Linde, D. and Cavalleri, Andrea and Siders, C. W. and Brown, F. L. H. and T{\´o}th, Csaba and Squier, Jeff A. and Barty, C. P. J. and Wilson, K. R. and Kammler, Martin}, title = {Time-resolved x-ray diffraction study of ultrafast acoustic phonon dynamics in Ge/Si-heterostructures}, series = {International Conference on Ultrafast Phenomena , 9 July 2000, Charleston}, journal = {International Conference on Ultrafast Phenomena , 9 July 2000, Charleston}, publisher = {Optica}, abstract = {Using time-resolved x-ray diffraction the ultafast strain dynamics in fs-laserexcited Ge/Si-heterostructures has been studied. A fluence dependent, anharmonic damping of the impulsively generated acoustic phonons and vibrational transport across the buried Ge/Si-interface are observed.}, language = {en} } @article{SidersCavalleriSokolowskiTintenetal., author = {Siders, C. W. and Cavalleri, Andrea and Sokolowski-Tinten, Klaus and T{\´o}th, Csaba and Guo, T. and Kammler, Martin and Horn-von Hoegen, Michael and Wilson, K. R. and von der Linde, D. and Barty, C. P. J.}, title = {Detection of nonthermal melting by ultrafast X-ray diffraction}, series = {Science}, volume = {286}, journal = {Science}, number = {5443}, doi = {10.1126/science.286.5443.1340}, pages = {1340 -- 1342}, abstract = {Using ultrafast, time-resolved, 1.54 angstrom x-ray diffraction, thermal and ultrafast nonthermal melting of germanium, involving passage through nonequilibrium extreme states of matter, was observed. Such ultrafast, optical-pump, x-ray diffraction probe measurements provide a way to study many other transient processes in physics, chemistry, and biology, including direct observation of the atomic motion by which many solid-state processes and chemical and biochemical reactions take place.}, language = {en} } @article{ReinkingKammlerHoffmannetal., author = {Reinking, D. and Kammler, Martin and Hoffmann, N. and Horn-von Hoegen, Michael and Hofmann, K. R.}, title = {Fabrication of high-mobility Ge p-channel MOSFETs on Si substrates}, series = {Electronics Letters}, volume = {35}, journal = {Electronics Letters}, number = {6}, publisher = {IET}, doi = {10.1049/el:19990349}, pages = {503 -- 504}, abstract = {The first fabrication of Ge p-channel MOSFETs (p-MOSFETs) on Si substrates is reported. A CMOS compatible process based on relaxed Ge layers grown on Si(111) substrates by surfactant mediated epitaxy (SME) was used. The non-optimised low temperature process yielded normally-off Ge p-MOSFETs with record channel drift mobilities of 430 cm2/Vs}, language = {en} } @article{SidersCavalleriSokolowskiTintenetal., author = {Siders, C. W. and Cavalleri, Andrea and Sokolowski-Tinten, Klaus and T{\´o}th, Csaba and Guo, T. and Kammler, Martin and Horn-von Hoegen, Michael and Wilson, K. R. and von der Linde, D. and Barty, C. P. J.}, title = {Direct Observation of Ultrafast Non-thermal Melting by Ultrafast X-ray Diffraction}, series = {Ultrafast Phenomena XII}, volume = {66}, journal = {Ultrafast Phenomena XII}, publisher = {Springer}, doi = {10.1007/978-3-642-56546-5_80}, pages = {276 -- 280}, abstract = {Ultrafast nonthermal melting of femtosecond laser-irradiated germanium was observed directly for the first time using sub-picosecond, 1.54-angstrom x-ray diffraction. Such measurements allow the study of transient atomic motion fundamental to many processes in physics, chemistry, and biology.}, language = {en} } @inproceedings{SchliermannHeydenreichScheueretal., author = {Schliermann, Rainer and Heydenreich, Patrick and Scheuer, Tanja and Anneken, Volker}, title = {Lebensqualit{\"a}t, Erwerbst{\"a}tigkeit und k{\"o}rperliche Aktivit{\"a}t bei Menschen mit Sehsch{\"a}digungen: Eine Befragung ehemaliger Rehabilitanden von Berufsf{\"o}rderungs- und Berufsbildungswerken}, series = {23. Rehabilitationswissenschaftliches Kolloquium - Deutscher Kongress f{\"u}r Rehabilitationsforschung: Arbeit - Gesundheit - Rehabilitation vom 10. bis 12. M{\"a}rz 2014 in Karlsruhe}, booktitle = {23. Rehabilitationswissenschaftliches Kolloquium - Deutscher Kongress f{\"u}r Rehabilitationsforschung: Arbeit - Gesundheit - Rehabilitation vom 10. bis 12. M{\"a}rz 2014 in Karlsruhe}, address = {Berlin}, isbn = {978-3-00-045196-6}, pages = {106 -- 108}, language = {de} } @incollection{SokolowskiTintenvonderLindeSidersetal., author = {Sokolowski-Tinten, Klaus and von der Linde, D. and Siders, C. W. and Cavalleri, Andrea and T{\´o}th, Csaba and Guo, T. and Wilson, K. R. and Barty, C. P. J. and Kammler, Martin and Horn-von Hoegen, Michael}, title = {Lattice dynamics of femtosecond laser-excited semiconductors probed by ultrafast x-ray diffraction}, series = {Applications of High Field and Short Wavelength Sources VIII}, booktitle = {Applications of High Field and Short Wavelength Sources VIII}, publisher = {Optica}, doi = {10.1364/HFSW.1999.PD3}, abstract = {The present knowledge of the atomic structure of matter is to a large extent due to x-ray spectroscopies.}, language = {en} } @misc{SchliermannScheuerHeydenreichetal., author = {Schliermann, Rainer and Scheuer, Tanja and Heydenreich, Patrick and Anneken, Volker}, title = {Sport und Lebensqualit{\"a}t von Personen mit Sehsch{\"a}digungen}, series = {Angewandte Sportpsychologie : 45. Jahrestagung der Arbeitsgemeinschaft f{\"u}r Sportpsychologie (asp) vom 09. - 11. Mai 2013 in Halle (Saale)}, journal = {Angewandte Sportpsychologie : 45. Jahrestagung der Arbeitsgemeinschaft f{\"u}r Sportpsychologie (asp) vom 09. - 11. Mai 2013 in Halle (Saale)}, editor = {Stoll, Oliver and Lau, Andreas and Moczall, Simone}, publisher = {Feldhaus, Ed. Czwalina}, address = {Hamburg}, isbn = {978-3-88020-597-0}, pages = {91}, language = {de} } @misc{SchliermannHeydenreichBungteretal., author = {Schliermann, Rainer and Heydenreich, Patrick and Bungter, Tanja and Anneken, Volker}, title = {Physical Activity and Quality of Life in People with Visual Impairments}, series = {Journal of Rehabilitation Medicine / Supplement}, journal = {Journal of Rehabilitation Medicine / Supplement}, number = {Supplement 54}, publisher = {Taylor \& Francis}, address = {Stockholm}, issn = {1650-1969}, pages = {26 -- 26}, language = {en} } @article{CerroneWawrzynekNonnetal., author = {Cerrone, Albert R. and Wawrzynek, Paul and Nonn, Aida and Paulino, Glaucio H. and Ingraffea, Anthony R.}, title = {Implementation and verification of the Park-Paulino-Roesler cohesive zone model in 3D}, series = {Engineering Fracture Mechanics}, volume = {120}, journal = {Engineering Fracture Mechanics}, doi = {10.1016/j.engfracmech.2014.03.010}, pages = {26 -- 42}, abstract = {The Park-Paulino-Roesler (PPR) potential-based model is a cohesive constitutive model formulated to be consistent under a high degree of mode-mixity. Herein, the PPR's generalization to three-dimensions is detailed, its implementation in a finite element framework is discussed, and its use in single-core and high performance computing (HPC) applications is demonstrated. The PPR model is shown to be an effective constitutive model to account for crack nucleation and propagation in a variety of applications including adhesives, composites, linepipe steel, and microstructures.}, language = {en} } @article{SchmidtKroegerFlegeetal., author = {Schmidt, Thomas and Kr{\"o}ger, Roland and Flege, Jan Ingo and Horn-von Hoegen, Michael and Clausen, T. and Falta, J. and Janzen, Andreas and Zahl, P. and Kury, P. and Kammler, Martin}, title = {Less strain energy despite fewer misfit dislocations: the impact of ordering}, series = {Physical review letters}, volume = {96}, journal = {Physical review letters}, number = {6}, publisher = {APS}, doi = {10.1103/PhysRevLett.96.066101}, abstract = {The average strain state of Ge films grown on Si(111) by surfactant mediated epitaxy has been compared to the ordering of the interfacial misfit dislocation network. Surprisingly, a smaller degree of average lattice relaxation was found in films grown at higher temperature. On the other hand, these films exhibit a better ordered dislocation network. This effect energetically compensates the higher strain at higher growth temperature, leading to the conclusion that, apart from the formation of misfit dislocations, their ordering represents an important channel for lattice-strain energy relaxation.}, language = {en} } @inproceedings{BaeumlHaumerKapelleretal., author = {B{\"a}uml, T. and Haumer, Anton and Kapeller, Hansj{\"o}rg and Starzinger, J. and Farzi, P.}, title = {Impact of inverter pulse inhibition on the high-voltage supply system of an electric vehicle — A simulative approach}, series = {2011 IEEE Vehicle Power and Propulsion Conference (VPPC 2011) : Powering sustainable transportation ; Chicago, Illinois, USA, 06. - 09.09.2011}, booktitle = {2011 IEEE Vehicle Power and Propulsion Conference (VPPC 2011) : Powering sustainable transportation ; Chicago, Illinois, USA, 06. - 09.09.2011}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-61284-248-6}, doi = {10.1109/VPPC.2011.6043159}, pages = {1 -- 5}, abstract = {This paper deals with a simulative approach for investigating the impact of inverter pulse inhibition during field weakening operation of permanent magnet synchronous machines and asynchronous induction machines. The modelling and simulation language Modelica is used to design models for the vehicle, the electric machine and the inverter in different abstraction levels. It is shown that when using a permanent magnet synchronous machine, a sudden breakdown of the field weakening current causes induction of high voltages in the stator windings. Hence, the electric system of the vehicle has to be protected against the resulting high currents. Furthermore precautions have to be taken to avoid dangerous driving conditions because of high braking torques in an inverter fault operation mode. In the case of the asynchronous induction machine an inverter pulse inhibition poses no big problem, neither for the electric system of the vehicle, nor the driver.}, language = {en} } @incollection{Rudolph, author = {Rudolph, Clarissa}, title = {Vergeschlechtlichungsprozesse im SGB II und gleichstellungspolitische Interventionen}, series = {Grundsicherung und Geschlecht : Gleichstellungspolitische Befunde zu den Wirkungen von Hartz IV}, booktitle = {Grundsicherung und Geschlecht : Gleichstellungspolitische Befunde zu den Wirkungen von Hartz IV}, editor = {Jaehrling, Karen and Rudolph, Clarissa}, publisher = {Westf{\"a}lisches Dampfboot}, address = {M{\"u}nster}, isbn = {978-3-89691-866-6}, pages = {57 -- 70}, subject = {Deutschland}, language = {de} } @article{HullGrayKammleretal., author = {Hull, Robert and Gray, J. L. and Kammler, Martin and Vandervelde, T. and Kobayashi, Takeshi and Kumar, P. and Pernell, T. and Bean, J. C. and Floro, J. A. and Ross, Frances M.}, title = {Precision placement of heteroepitaxial semiconductor quantum dots}, series = {Materials Science and Engineering: B}, volume = {101}, journal = {Materials Science and Engineering: B}, number = {1-3}, publisher = {Elsevier}, doi = {10.1016/S0921-5107(02)00680-3}, pages = {1 -- 8}, abstract = {We describe two new approaches to the patterning of Si(1 0 0) surfaces for controlled nucleation of heteroepitaxial Ge semiconductor clusters. In the first method, a Ga ' -focused ion beam in situ to the growth chamber is used to create local regions of enhanced Ga ' concentration and surface topography. It is shown that at low ion doses ({\^A}/10 14 cm (2), implanted Ga causes local nucleation of Ge clusters upon the implanted region. At higher doses (]/10 15 cm (2), a complex surface topography localizes nucleation of Ge clusters. This approach can be used to seed complex patterns of Ge clusters with diameters of tens of nanometers and positional accuracy of sub-100 nm. The second method employs self-assembly of complex strain-stabilized ''quantum quadruplet'' and ''quantum fortress'' structures, whereby cooperative island nucleation around shallow strain-relieving pits is identified during Ge x Si 1(x /Si(1 0 0) heteroepitaxy. These configurations are kinetically limited structures that exist over a range of compositions, growth temperatures, and growth rates, but which are destabilized by strain relaxation (e.g. by the introduction of misfit dislocations) and by growth conditions which provide high adatom surface mobilities. Both methods have broad potential application to nanoelectronic device architectures. 2003 Elsevier Science B.V. All rights reserved.}, language = {en} } @inproceedings{JungreuthmayerBaumlWinteretal., author = {Jungreuthmayer, C. and Bauml, T. and Winter, O. and Ganchev, M. and Kapeller, Hansj{\"o}rg and Haumer, Anton and Kral, Christian}, title = {Heat and fluid flow analysis of an internal permanent magnet synchronous machine by means of computational fluid dynamics}, series = {2011 IEEE International Electric Machines \& Drives Conference (IEMDC 2011) ; Niagara Falls, Ontario, Canada, 15 - 18 May 2011}, booktitle = {2011 IEEE International Electric Machines \& Drives Conference (IEMDC 2011) ; Niagara Falls, Ontario, Canada, 15 - 18 May 2011}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4577-0060-6}, doi = {10.1109/IEMDC.2011.5994651}, pages = {515 -- 520}, abstract = {This paper presents a comprehensive computational fluid (CFD) model of a radial flux permanent magnet synchronous machine with interior magnets. In the CFD model the water jacket cooling and a simplified model of the topology of the distributed stator winding are considered. The heat sources of the CFD model are determined from a finite element analysis of the machine. The numerically determined temperature distributions of the machine are compared with measurement results from sensors located both in the stator and rotor. The particular focus of this paper is the analysis of the temperatures and the heat flow in the air gap and from the stator winding head and the rotor to the inner air.}, language = {en} } @article{SchuemannMorichKaufholdetal., author = {Sch{\"u}mann, Malte and Morich, J. and Kaufhold, Tobias and B{\"o}hm, Valter and Zimmermann, Klaus and Odenbach, Stefan}, title = {A mechanical characterisation on multiple timescales of electroconductive magnetorheological elastomers}, series = {Magnetism and Magnetic Materials}, volume = {453}, journal = {Magnetism and Magnetic Materials}, number = {May}, publisher = {Elsevier}, doi = {10.1016/j.jmmm.2018.01.029}, pages = {198 -- 205}, abstract = {Magnetorheological elastomers are a type of smart hybrid material which combines elastic properties of a soft elastomer matrix with magnetic properties of magnetic micro particles. This leads to a material with magnetically controllable mechanical properties of which the magnetorheological effect is the best known. The addition of electroconductive particles to the polymer mix adds electrical properties to the material behaviour. The resulting electrical resistance of the sample can be manipulated by external magnetic fields and mechanical loads. This results in a distinct interplay of mechanical, electrical and magnetic effects with a highly complex time behaviour. In this paper a mechanical characterisation on multiple time scales was conducted to get an insight on the short and long-term electrical and mechanical behaviour of this novel material. The results show a complex resistivity behaviour on several timescales, sensitive to magnetic fields and strain velocity. The observed material exhibits fatigue and relaxation behaviour, whereas the magnetorheological effect appears not to interfere with the piezoresistive properties.}, language = {en} } @article{ShamoninChamonineKlankHagedornetal., author = {Shamonin (Chamonine), Mikhail and Klank, Michael and Hagedorn, Oliver and D{\"o}tsch, Horst}, title = {Magneto-optical visualization of metal-loss defects in a ferromagnetic plate: experimental verification of theoretical modeling}, series = {Applied optics}, volume = {40}, journal = {Applied optics}, number = {19}, publisher = {Optica Publishing Group}, doi = {10.1364/ao.40.003182}, pages = {3182 -- 3189}, abstract = {Rare-earth iron garnet films with in-plane magnetic anisotropy grown on [111]-oriented substrates are promising for the visualization of magnetic leakage fields in nondestructive evaluation. Such magneto-optical films have to be specifically engineered, and we give an example of this technology. To assess the validity and accuracy of finite-element calculations of a magnetization assembly combined with the physical modeling of the image formation, comparisons between calculated and experimentally obtained magneto-optical images of metal-loss defects have been made. A convincing quantitative agreement is demonstrated. It is shown that both physical and computer modeling techniques allow for a predictive engineering design of the prospective applications and provide greater insight into the method.}, language = {en} } @inproceedings{BulendaKnippersSailer, author = {Bulenda, Thomas and Knippers, Jan and Sailer, S.}, title = {Untersuchungen zum Tragverhalten von Netzkuppeln}, series = {Finite Elemente in der Baupraxis : Modellierung, Berechnung und Konstruktion ; Beitr{\"a}ge der Tagung FEM '95 an der Universit{\"a}t Stuttgart am 23. und 24. Februar 1995}, booktitle = {Finite Elemente in der Baupraxis : Modellierung, Berechnung und Konstruktion ; Beitr{\"a}ge der Tagung FEM '95 an der Universit{\"a}t Stuttgart am 23. und 24. Februar 1995}, editor = {Ramm, Ekkehard and Stein, W. and Wunderlich, W.}, publisher = {Ernst}, address = {Berlin}, isbn = {978-3-433-01289-5}, pages = {201 -- 212}, language = {de} } @inproceedings{BulendaKnippersPark, author = {Bulenda, Thomas and Knippers, Jan and Park, D.-U.}, title = {Traglastberechnung von Gitterschalentonnen}, series = {Software f{\"u}r Statik und Konstruktion : Berichte des 9.SOFiSTiK Anwender Seminars, N{\"u}rnberg, Juni 1997}, booktitle = {Software f{\"u}r Statik und Konstruktion : Berichte des 9.SOFiSTiK Anwender Seminars, N{\"u}rnberg, Juni 1997}, editor = {Katz, Casimir and Protopsaltis, Byron}, isbn = {9789054109549}, pages = {437 -- 460}, language = {de} } @misc{KellnerUtz, author = {Kellner, Florian and Utz, Sebastian}, title = {Using Inverse Optimization to Discover Sustainability Priorities in Purchasing Decisions}, series = {International Conference on Operations Research 2023 // 29. Aug. - 01. Sep. 2023, Hamburg}, journal = {International Conference on Operations Research 2023 // 29. Aug. - 01. Sep. 2023, Hamburg}, language = {en} } @misc{SchulzKiessGoedeke, author = {Schulz, Carsten and Kiess, Benjamin and Goedeke, Arne}, title = {Impact of Elasticity on the Transmission Behavior of Thin Ring Gears}, series = {Wind and Drivetrain Conference, 4, 2018, Hamburg}, journal = {Wind and Drivetrain Conference, 4, 2018, Hamburg}, language = {en} } @article{StaabKlenkGalkaetal., author = {Staab, T. and Klenk, Eva Marianne and Galka, Stefan and G{\"u}nthner, Willibald A.}, title = {Efficiency in in-plant milk-run systems - The influence of routing strategies on system utilization and process stability}, series = {Journal of Simulation}, volume = {10}, journal = {Journal of Simulation}, number = {2}, publisher = {Taylor \& Francis}, address = {Abingdon}, issn = {1747-7786}, doi = {10.1057/jos.2015.6}, pages = {137 -- 143}, abstract = {In-plant milk-run systems represent transportation systems, where materials are delivered from a central storage area to several points of use on fixed routes and in short and defined intervals. Milk-run systems generally enable frequent deliveries in low lot sizes with short lead times and low inventories at the points of use. Thus, stable and reliable system operation is crucial to avoid delays and material shortages. In industrial practice, milk-run trains usually share resources, for example, loading areas and technology and use the same tracks, leading to dependencies between routes and possible traffic jams and blockages, which significantly affect cycle times and may lead to instabilities in the system. We present a simulation model to analyse in-plant milk-run systems with a focus on typical traffic situations. We describe its application to a large industrial case study in detail and derive recommendations for designing routes with low risk of delays.}, language = {en} } @article{KlankHagedornHolthausetal., author = {Klank, Michael and Hagedorn, Oliver and Holthaus, Carsten and Shamonin (Chamonine), Mikhail and D{\"o}tsch, Horst}, title = {Characterization and optimization of magnetic garnet films for magneto-optical visualization of magnetic field distributions}, series = {NDT \& E International}, volume = {36}, journal = {NDT \& E International}, number = {6}, publisher = {Elsevier}, doi = {10.1016/S0963-8695(03)00012-4}, pages = {375 -- 381}, abstract = {Rare-earth iron garnet films with in-plane anisotropy grown on (111)-oriented substrates can be used as magneto-optical indicator films for visualization of magnetic leakage fields in nondestructive evaluation. The influence of Faraday rotation, Faraday ellipticity, absorption and film thickness on the performance of a magneto-optical indicator film is investigated. A new optimization method is introduced and compared with the method of contrast optimization. The theory is experimentally verified and an application example is presented.}, language = {en} } @article{ShamoninChamonineBeukerRosenetal., author = {Shamonin (Chamonine), Mikhail and Beuker, T. and Rosen, P. and Klank, Michael and Hagedorn, Oliver and D{\"o}tsch, Horst}, title = {Feasibility of magneto-optic flaw visualization using thin garnet films}, series = {NDT \& E International}, volume = {33}, journal = {NDT \& E International}, number = {8}, publisher = {Elsevier}, doi = {10.1016/s0963-8695(00)00028-1}, pages = {547 -- 553}, abstract = {We investigate the feasibility of using rare-earth iron garnet films grown on (111)-oriented substrates as magneto-optic indicator films for the visualization of magnetic leakage fields in non-destructive evaluation. In most cases the leakage field of the defect has a strong component in the film plane. The influence of this in-plane dc magnetic field on the image formation is investigated. It is shown that the presence of a strong in-plane magnetic field allows one to extend the dynamic range of the out-of-plane field imposed by the uniaxial anisotropy field HA. On the other hand, an in-plane field reduces the sensitivity. The guidelines for selecting parameters of magneto-optic indicator films are given.}, language = {en} } @article{KlankHagedornShamoninChamonineetal., author = {Klank, Michael and Hagedorn, Oliver and Shamonin (Chamonine), Mikhail and Rosen, H. and D{\"o}tsch, Horst}, title = {Sensitive magneto-optical sensors for visualization of magnetic fields using garnet films of specific orientations}, series = {Journal of Applied Physics}, volume = {92}, journal = {Journal of Applied Physics}, publisher = {AIP}, doi = {10.1063/1.1516839}, abstract = {Garnet films of high Faraday rotation are applied as magneto-optical sensors to visualize the spatial distribution of magnetic fields. Using specific orientations, the induced anisotropy can generate an easy plane of magnetization which is inclined with respect to the film plane. If the magnetization lies in this plane a very high sensitivity can be achieved. The dependence of the geometrical orientation of the easy plane on the growth direction is calculated and the sensitivity and dynamic range are derived. Experimental results of a [112] oriented garnet film are in good agreement with calculations.}, language = {en} } @article{ZimmermannBoehmBeckerTIetal., author = {Zimmermann, Klaus and B{\"o}hm, Valter and Becker T.I., and Chavez Vega, Jhohan Harvey and Kaufhold, Tobias and Monkman, Gareth J. and Sindersberger, Dirk and Diermeier, Andreas and Prem, Nina}, title = {Mechanical Characterization of the Field-Dependent Properties of Magnetoactive Polymers and Integrated Electrets for their Application in Soft Robotics}, series = {International Scientific Journal "Problems of Mechanics"}, volume = {69}, journal = {International Scientific Journal "Problems of Mechanics"}, number = {4}, issn = {1512-0740}, language = {en} } @misc{Kellner, author = {Kellner, Florian}, title = {Multi-objective supplier portfolio configuration under supply risk and sustainability considerations}, series = {International Conference on Operations Research (OR2017), September 2017, Berlin}, journal = {International Conference on Operations Research (OR2017), September 2017, Berlin}, language = {en} } @incollection{SchliermannAnneken, author = {Schliermann, Rainer and Anneken, Volker}, title = {Einfach Fußball - ein inklusionsbezogenes und gesundheitsp{\"a}dagogisches Gemeinschaftsprojekt von Bayer und Deutschem Fußball-Bund}, series = {Kinder bewegen - wissenschaftliche Energien b{\"u}ndeln, 16.-17.02.2011, Karlsruhe}, booktitle = {Kinder bewegen - wissenschaftliche Energien b{\"u}ndeln, 16.-17.02.2011, Karlsruhe}, editor = {Woll, A. and B{\"o}s, K. and Huber, G. and Kemper, Reinhild and Knoll, Michaela Beate and Pahmeier, I. and Sudeck, R. and Vogt, L. and Spengler, S. and Peterhans, E.}, publisher = {KIT}, address = {Karlsruhe}, pages = {52}, language = {de} } @inproceedings{GoedekeSchulzGrussetal., author = {Goedeke, Arne and Schulz, Carsten and Gruss, H. and Kieß, Benjamin}, title = {Structural Health Monitoring auf Basis sich ver{\"a}ndernder Strukturdehnungen an Br{\"u}ckentr{\"a}gern}, series = {Der Kran - Leistungssteigerung, Leichtbau und Automatisierung : 27. Internationale Kranfachtagung 2019 : Begleitband zur Kranfachtagung am 07. M{\"a}rz 2019 in Bochum}, booktitle = {Der Kran - Leistungssteigerung, Leichtbau und Automatisierung : 27. Internationale Kranfachtagung 2019 : Begleitband zur Kranfachtagung am 07. M{\"a}rz 2019 in Bochum}, publisher = {Selbstverlag der Ruhr-Universit{\"a}t Bochum}, isbn = {3-89194-226-5}, language = {de} } @inproceedings{KellnerOttoBusch, author = {Kellner, Florian and Otto, Andreas and Busch, Andreas}, title = {Distribution Networks - Rigid Investments In Dynamic Environments}, series = {Flexibility and adaptability of global supply chains - Proceedings of the 7th German-Russian Logistics Workshop (DR-LOG 2012)}, booktitle = {Flexibility and adaptability of global supply chains - Proceedings of the 7th German-Russian Logistics Workshop (DR-LOG 2012)}, editor = {Ivanov, Dimitri and Sokolov, Boris and K{\"a}schel, Joachim}, address = {Sankt Petersburg}, pages = {103 -- 111}, language = {en} } @misc{Kellner, author = {Kellner, Florian}, title = {Visual decision support for the multi-objective supplier selection problem}, series = {International Conference on Multiple Objective Programming and Goal Programming (MOPGP), 30-31 October 2017, Metz, France}, journal = {International Conference on Multiple Objective Programming and Goal Programming (MOPGP), 30-31 October 2017, Metz, France}, language = {en} } @misc{KellnerUtz, author = {Kellner, Florian and Utz, Sebastian}, title = {Exploring Sustainability Priorities in Purchasing Decisions Based on Inverse Optimization}, series = {NAMA Conference 2023, 28.-29. Sep. 2023, Oldenburg}, journal = {NAMA Conference 2023, 28.-29. Sep. 2023, Oldenburg}, language = {en} } @incollection{Schliermann, author = {Schliermann, Rainer}, title = {Leistungssport von Athletinnen und Athleten mit Behinderungen}, series = {Handbuch Behinderung und Sport}, booktitle = {Handbuch Behinderung und Sport}, editor = {Wegner, Manfred and Scheid, Volker and Knoll, Michaela Beate}, publisher = {Hofmann}, address = {Schorndorf}, isbn = {978-3-7780-4880-1}, pages = {238 -- 247}, language = {de} } @article{HoenickaLehleJacobsetal., author = {Hoenicka, Markus and Lehle, Karla and Jacobs, V. R. and Dendorfer, Sebastian and Kostorz, A. and Schmid, F. X. and Birnbaum, D. E.}, title = {Mechanical and seeding properties of human umbilical vein - a potential scaffold for a tissue-engineered vessel graft}, series = {The Thoracic and Cardiovascular Surgeon}, volume = {55}, journal = {The Thoracic and Cardiovascular Surgeon}, number = {S 1}, publisher = {Thieme}, doi = {10.1055/s-2007-967592}, pages = {P_37}, abstract = {Objectives: The mechanical properties and seeding with endothelial cells were investigated in fresh and cryopreserved human umbilical vein. Methods: Human umbilical veins (HUV) were frozen in Euro-Collins/1M DMSO at -1°C/min and stored in liquid nitrogen. Stress-strain relationships of fresh and thawed veins were determined in an uniaxial tension-testing rig. HUV endothelial cells (HUVEC) were seeded onto denuded HUV under static conditions and grown for 3d. Luminal surfaces were analyzed by scanning electron microscopy. Calcein-stained cells were seeded hyperconfluently to determine the cell retention capacity of fresh and cryopreserved veins. Results: The stress-strain relationships of HUV followed a biphasic pattern typical for natural vessels. Neither the failure stress (2.71±0.36 vs. 3.25±0.97 N, n=3) nor the displacement required to achieve failure (9.73±0.9 vs. 7.43±2.07mm, n=3) were altered by cryopreservation. The burst pressure was estimated as approx. 1000mm Hg within the limitations of the uniaxial model. HUVEC seeded onto denuded HUV formed patches (at 9E3 cells per cm2) or an almost confluent endothelium (at 3E4 cells per cm2) within three days. The capacity to retain seeded HUVEC of denuded HUV was not altered by cryopreservation (1.15±0.08E5 vs. 1.26±0.14E5 cells per cm2, n=6). Conclusions: The burst pressure of HUV seems to be sufficiently high for the human arterial circulation and is not altered by cryopreservation. HUVEC can establish a confluent endothelium on denuded HUV. Therefore HUV appears to be a suitable storable scaffold for vascular tissue engineering.}, subject = {Nabelvene}, language = {en} } @article{SchuezDraegerRichteretal., author = {Sch{\"u}z, B. and Dr{\"a}ger, D. and Richter, Stefanie and Kummer, K. and Kuhlmey, Adelheid and Tesch-R{\"o}mer, C.}, title = {Autonomie trotz Multimorbidit{\"a}t im Alter - Der Berliner Forschungsverbund AMA}, series = {Zeitschrift fur Gerontologie und Geriatrie}, volume = {44}, journal = {Zeitschrift fur Gerontologie und Geriatrie}, number = {Suppl. 2}, publisher = {Springer Medizin}, issn = {1435-1269}, doi = {10.1007/s00391-011-0248-4}, pages = {9 -- 26}, abstract = {Mit zunehmendem Alter steigt der Anteil mehrfach erkrankter Menschen und immer mehr Menschen erreichen ein sehr hohes Lebensalter. Trotz des medizinischen Fortschritts und verbesserter Lebenslagen m{\"u}ssen viele alte Menschen k{\"o}rperliche, psychische und soziale Einschr{\"a}nkungen bew{\"a}ltigen. Es ist eine große gesundheits- und sozialpolitische Herausforderung, diese alten Frauen und M{\"a}nner mit gesundheitlichen Beeintr{\"a}chtigungen in ihrem Bestreben nach einer weitestgehend autonomen Lebensgestaltung zu unterst{\"u}tzen und zu st{\"a}rken. Vor diesem Hintergrund widmete sich der Forschungsverbund „Autonomie trotz Multimorbidit{\"a}t im Alter" (AMA I) der Leitfrage, inwieweit eine selbstbestimmte Lebensgestaltung alter mehrfach erkrankter Menschen erhalten werden kann. Um der Vielfalt der Lebenswelten {\"a}lterer Menschen gerecht zu werden, wurden im Alltag wenig eingeschr{\"a}nkte und pflegebed{\"u}rftige sowie kognitiv beeintr{\"a}chtigte Personen in die Untersuchung einbezogen. Darunter waren Frauen und M{\"a}nner, die noch im eigenen Haushalt und solche die im Pflegeheim lebten. Im Fokus der Untersuchungen standen die Ressourcen, die den alten Menschen in ihrer jeweiligen Lebenssituation zur Verf{\"u}gung standen und die Frage, wie diese gest{\"a}rkt werden k{\"o}nnen. Der Beitrag pr{\"a}sentiert Ergebnisse zu dieser Forschungsfrage aus der 1. F{\"o}rderphase des AMA-Verbundes. Darauf aufbauend werden in einer 2. F{\"o}rderphase (2011-2013, AMA II) nunmehr nachhaltige praxisrelevante Interventionen zur Mobilisierung von autonomierelevanten Ressourcen mehrfach erkrankter alter Menschen entwickelt und auf ihre Praxistauglichkeit getestet.}, language = {de} } @article{SchottKlempererLieb, author = {Schott, Gisela and Klemperer, David and Lieb, Klaus}, title = {Arzneimittel: Sinnvolle Studien nach der Zulassung}, series = {Deutsches {\"A}rzteblatt}, volume = {118}, journal = {Deutsches {\"A}rzteblatt}, number = {23}, publisher = {Deutscher {\"A}rzteverlag}, address = {Berlin}, pages = {A-1148 / B-945}, abstract = {Die Arzneimittelkommission der deutschen {\"A}rzteschaft erkl{\"a}rt, an welchen Postzulassungsstudien {\"A}rztinnen und {\"A}rzte teilnehmen sollten - und an welchen nicht.}, language = {de} } @article{Unold, author = {Unold, Heiko}, title = {„Analog Discovery 2" mobiles Praktikum OTH Regensburg}, series = {strategie digital. Magazin f{\"u}r Hochschulstrategien im digitalen Zeitalter}, journal = {strategie digital. Magazin f{\"u}r Hochschulstrategien im digitalen Zeitalter}, number = {Ausgabe \#05: Kooperative Curriculumentwicklung}, editor = {Hochschulforum Digitalisierung,}, issn = {2750-0993}, pages = {1}, abstract = {Allen Studierenden wird zu Beginn des zweiten Semesters ein elektronisches Experimentierset mit einem Analog Discovery als „mobiles Praktikum" f{\"u}r die gesamte Dauer des Studiums ausgeliehen. Im Rahmen der Lehrinnovationsprofessur (LIP) wird Material f{\"u}r m{\"o}glichst viele verschiedene Module des Studiengangs entwickelt, um Fachwissen praktisch erfahrbar zu machen und gleichzeitig die Module inhaltlich zu verkn{\"u}pfen.}, subject = {Elektroniktechnologie}, language = {de} } @article{LaufSchmiederVolynec, author = {Lauf, Wolfgang and Schmieder, G. and Volynec, I. A.}, title = {The automorphism space Σ(G) of a domain without punctiform prime ends}, series = {The Journal of Geometric Analysis}, volume = {10}, journal = {The Journal of Geometric Analysis}, number = {4}, publisher = {Springer}, issn = {1050-6926}, doi = {10.1007/BF02921993}, pages = {697 -- 712}, abstract = {Let G ⊆ ℂ be a simply connected domain and let Σ (G) be its group of conformal automorphisms with the topology of uniform chordal convergence on G. In 1984 Gaier raised the question whether the connectedness of the space Σ (G) implies that the domain G has only punctiform prime ends. As a contribution to answering this question in this paper the authors use suitable spike Junctions to construct a bounded domain without any punctiform prime end such that its automorphism space Σ (G) is not discrete, but totally disconnected.}, language = {en} } @article{DendorferMaierHammer, author = {Dendorfer, Sebastian and Maier, Hans J{\"u}rgen and Hammer, Joachim}, title = {Fatigue damage in cancellous bone: an experimental approach from continuum to micro scale}, series = {Journal of the Mechanical Behavior of Biomedical Materials}, volume = {2}, journal = {Journal of the Mechanical Behavior of Biomedical Materials}, number = {1}, doi = {10.1016/j.jmbbm.2008.03.003}, pages = {113 -- 119}, abstract = {Repeated loadings may cause fatigue fractures in bony structures. Even if these failure types are known, data for trabecular bone exposed to cyclic loading are still insufficient as the majority of fatigue analyses on bone concentrate on cortical structures. Despite its highly anisotropic and inhomogeneous structure, trabecular bone is treated with continuum approaches in fatigue analyses. The underlying deformation and damage mechanism within trabecular specimens are not yet sufficiently investigated. In the present study different types of trabecular bone were loaded in monotonic and cyclic compression. In addition to the measurement of integral specimen deformations, optical deformation analysis was employed in order to obtain strain distributions at different scale levels, from the specimens' surface to the trabeculae level. These measurements allowed for the possibility of linking the macroscopic and microscopic mechanical behaviour of cancellous bone. Deformations were found to be highly inhomogeneous across the specimen. Furthermore strains were found to already localise at very low load levels and after few load cycles. Microcracks in individual trabeculae were induced in the very early stage of cyclic testing. The results provide evidence of the capability of the method to supply essential data on the failure behaviour of individual trabeculae in future studies.}, subject = {Knochen}, language = {en} } @incollection{DendorferMaierHammer, author = {Dendorfer, Sebastian and Maier, Hans J{\"u}rgen and Hammer, Joachim}, title = {How do age and anisotropy affect the fatigue behaviour of cancellous bone?}, series = {Medicine Meets Engineering}, booktitle = {Medicine Meets Engineering}, publisher = {IOS Press}, pages = {68 -- 74}, abstract = {The fatigue behaviour of materials is of particular interest for the failure prediction of materials and structures exposed to cyclic loading. For trabecular bone structures only a few sets of lifetime data have been reported in the literature and structural measures are commonly not considered. The influence of load contributions not aligned with the main physiological axis remains unclear. Furthermore age effects on the fatigue behaviour are not well described. In the present study, different groups of human vertebral cancellous bone were exposed to cyclic compression. The inital modulus and therefore lifetimes were found to be highly dependent on age. The decrease in both with increasing age was much more pronounced in specimens which were not aligned with the main physiological axis. This implies that old bone is much more sensitive to (cyclic) failure loads in general but particularly to loads which are not coincident with the physiological main axis.}, subject = {Knochenbruch}, language = {en} } @techreport{HuKaboutehSchlandtetal., author = {Hu, Rongbo and Kabouteh, Amir and Schlandt, Marcel and G{\"u}ttler, J{\"o}rg and Linner, Thomas and Kozak, Dominika and Walter, B. and Sch{\"a}pers, Barbara and Randriambelonoro, Mirana E.}, title = {Partly functional / functional mock-ups and prototypes of Personalised Intelligent Interior Units (PI²Us)}, abstract = {This deliverable report examines the outcome of the construction of functional or partly functional prototypes or mock-ups of Personalized Interior Intelligent Environment Units (PI²Us) for demonstration and testing purposes, associated with Task T5.4. The first part of this document will give an overview of the relation of this task to other tasks of WP5, other work packages, and the larger framework of the REACH project. The second part sets out the details of the progressive development from early concepts to the current prototyping stage. Moreover, the subsequent lab-based testing is described in the third part of the report. This includes both already carried out and planned testing activities for either early stage validation or final demonstration in a naturalistic test environment. Finally, part four summarizes the results and puts the different prototypes in perspective to the respective touchpoints and the overall REACH engine functionality. This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 690425.}, language = {en} } @inproceedings{HacklHirschbergLexetal., author = {Hackl, Andreas and Hirschberg, Wolfgang and Lex, Cornelia and Rill, Georg}, title = {Tyre type dependent transient force behaviour by means of a maxwell model}, series = {The Dynamics of Vehicles on Roads and Tracks : Proceedings of the 25th Symposium of the International Association of Vehicle System Dynamics (IAVSD 2017), Rockhampton, Queensland, Australia, 14-18 August 2017}, booktitle = {The Dynamics of Vehicles on Roads and Tracks : Proceedings of the 25th Symposium of the International Association of Vehicle System Dynamics (IAVSD 2017), Rockhampton, Queensland, Australia, 14-18 August 2017}, editor = {Spiryagin, Maksym and Gordon, Timothy and Cole, Colin and McSweeney, Tim}, publisher = {CRC Press}, address = {London}, isbn = {1351057170}, doi = {10.1201/9781315265506}, pages = {157 -- 162}, abstract = {The present papers deals with the usability of an extended Maxwell model to describe the tyre dynamics during transient driving manoeuvres. In the present article, the para-metrisation process of a dynamic tyre model is investigated in a first step, using measurement data of tyre forces from a flat trac tyre test bench, (IABG 2016). Two tyre types of dimensions 255/50 R19 and 175/55 R15 are used. The practical applicability is discussed, considering the measurement procedure and the parameter optimisation process. In a second step, the performance of the dynamic tyre model is validated using measurements of manoeuvres under higher dynamic excitation. As a last step, an outlook is given on further research planned in which the presented model and parametrisation are adapted to a larger frequency range.}, language = {en} } @article{LohmeyerShamoninChamonineHertel, author = {Lohmeyer, Manfred and Shamonin (Chamonine), Mikhail and Hertel, Peter}, title = {Boundary conditions for the finite difference beam propagation method based on plane wave solutions of the Fresnel equation}, series = {IEEE Journal of Quantum Electronics}, volume = {33}, journal = {IEEE Journal of Quantum Electronics}, number = {2}, issn = {0018-9197}, doi = {10.1109/3.552269}, pages = {279 -- 286}, abstract = {Each particular implementation of the beam propagation method (BPM) requires a special procedure allowing for radiation to leave the computational window. We propose a new approach to constructing the finite difference schemes of the BPM at the boundary of the computational window. These schemes are independent of the computed fields and allow for a similar treatment of both interior and boundary points. The new approach can be further improved by correcting the field values at the boundary points according to Hadley's method. The algorithm is easy to implement for both two- and three-dimensional structures. The new method considerably reduces computation times because the propagation matrices remain constant in longitudinally invariant sections, thus avoiding repeated LU-decompositions. The basic idea-establishing the finite difference scheme such that locally exact, approximate, or plausible solutions are recovered-may be of interest for other efforts to solve partial differential equations by the finite difference method.}, language = {en} } @article{ShamoninChamonineLohmeyerHertel, author = {Shamonin (Chamonine), Mikhail and Lohmeyer, Manfred and Hertel, Peter}, title = {Analysis of power-dependent switching between radiatively coupled planar waveguides}, series = {Journal of Lightwave Technology}, volume = {15}, journal = {Journal of Lightwave Technology}, number = {6}, publisher = {IEEE}, address = {New York}, doi = {10.1109/50.588671}, pages = {983 -- 989}, abstract = {Effective coupling between two remote optical waveguides without branching sections can be achieved in a three-guide system with multimode central waveguide. We investigate the nonlinear power switching of c.w. laser radiation by such radiatively coupled waveguides. It is shown that effective all-optical switches with spatially well separated input/output channels can be realized although the influence of multimode interference on the switching characteristics becomes more pronounced for increasing thickness of the central guide. Different coupling regimes are specified, and the changes in switching characteristics during the transformation from one regime to another is studied. Numerical calculations for the critical power are compared with an approximate analytical expression. It is also shown that, at a moderate input power, a small number of modes determines the switching behavior.}, language = {en} } @article{LohmeyerShamoninChamonineBahlmannetal., author = {Lohmeyer, Manfred and Shamonin (Chamonine), Mikhail and Bahlmann, N. and Hertel, Peter and Dotsch, H.}, title = {Radiatively Coupled Waveguide Concept for an Integrated Magneto-Optic Circulator}, series = {MRS Online Proceedings Library}, journal = {MRS Online Proceedings Library}, number = {517}, issn = {1946-4274}, doi = {10.1557/PROC-517-519}, pages = {519 -- 524}, abstract = {Three-guide couplers with multimode central waveguides allow for remote coupling between optical channels. A simple three mode approximation turns out to be sufficient for the description of the main features of the power transfer behavior. The specific form of the relevant modes suggests the design of integrated optical isolators and circulators based on magnetic garnet materials. These novel devices are superior to conventional nonreciprocal couplers with respect to the total length and admissible fabrication tolerances. We characterize the isolation performance and the transmission loss for the proposed devices by propagating mode simulations and estimate the influence of geometry parameter deviations.}, language = {en} } @article{VonGreveDierfeldLothenbachVollprachtetal., author = {Von Greve-Dierfeld, Stefanie and Lothenbach, Barbara and Vollpracht, Anya and Wu, Bei and Huet, Bruno and Andrade, Carmen and Medina, C{\´e}sar and Thiel, Charlotte and Gruyaert, Elke and Vanoutrive, Hanne and Del Sa{\´e}z Bosque, Isabel F. and Ignjatovic, Ivan and Elsen, Jan and Provis, John L. and Scrivener, Karen and Thienel, Karl-Christian and Sideris, Kosmas and Zajac, Maciej and Alderete, Natalia and Cizer, {\"O}zlem and Van den Heede, Philip and Hooton, Robert Douglas and Kamali-Bernard, Siham and Bernal, Susan A. and Zhao, Zengfeng and Shi, Zhenguo and De Belie, Nele}, title = {Understanding the carbonation of concrete with supplementary cementitious materials}, series = {Materials and Structures}, volume = {53}, journal = {Materials and Structures}, publisher = {Springer Nature}, doi = {10.1617/s11527-020-01558-w}, pages = {1 -- 34}, abstract = {Blended cements, where Portland cement clinker is partially replaced by supplementary cementitious materials (SCMs), provide the most feasible route for reducing carbon dioxide emissions associated with concrete production. However, lowering the clinker content can lead to an increasing risk of neutralisation of the concrete pore solution and potential reinforcement corrosion due to carbonation. carbonation of concrete with SCMs differs from carbonation of concrete solely based on Portland cement (PC). This is a consequence of the differences in the hydrate phase assemblage and pore solution chemistry, as well as the pore structure and transport properties, when varying the binder composition, age and curing conditions of the concretes. The carbonation mechanism and kinetics also depend on the saturation degree of the concrete and CO2 partial pressure which in turn depends on exposure conditions (e.g. relative humidity, volume, and duration of water in contact with the concrete surface and temperature conditions). This in turn influence the microstructural changes identified upon carbonation. This literature review, prepared by members of RILEM technical committee 281-CCC carbonation of concrete with supplementary cementitious materials, working groups 1 and 2, elucidates the effect of numerous SCM characteristics, exposure environments and curing conditions on the carbonation mechanism, kinetics and structural alterations in cementitious systems containing SCMs.}, language = {en} } @article{ShamoninChamonineLohmeyerHertel, author = {Shamonin (Chamonine), Mikhail and Lohmeyer, Manfred and Hertel, Peter}, title = {Directional coupler based on radiatively coupled waveguides}, series = {Applied optics (Appl. Opt.)}, volume = {36}, journal = {Applied optics (Appl. Opt.)}, number = {3}, doi = {10.1364/ao.36.000635}, pages = {635 -- 641}, abstract = {We investigate a system of two waveguides with leaky modes sharing a common substrate (radiatively coupled waveguides). The main advantage of such a system is the possibility of remote coupling. A perturbation theory is developed for both TE and TM polarization. Numerical calculations of dispersion curves and of the coupling length allow us to determine the limitations of the perturbation theory. We study the influence of multimode interference on the process of beating by considering the propagation of a given initial field. Finally, we propose a new design for an effective, integrated optical TE-TM polarization splitter.}, language = {en} } @misc{HornPippigRaptisetal., author = {Horn, L. C and Pippig, S. and Raptis, Georgios and Fischer, Uta and Kohler, U. and Hentschel, Bettina and Martin, Rosemarie}, title = {00083 PAI-1 AND UFA AS PARAMETERS OF TUMORASSOCIATED PROTEOLYSIS IN CERVICAL CARCINOMA}, series = {International Journal of Gynecologic Cancer}, volume = {15}, journal = {International Journal of Gynecologic Cancer}, number = {Suppl 2}, publisher = {BMJ}, issn = {1048-891X}, doi = {10.1136/ijgc-00009577-200509001-00083}, language = {en} } @article{PolzGlawionGebissoetal., author = {Polz, Julius and Glawion, Luca and Gebisso, Hiob and Altenstrasser, Lukas and Graf, Maximilian and Kunstmann, Harald and Vogl, Stefanie and Chwala, Christian}, title = {Temporal Super-Resolution, Ground Adjustment, and Advection Correction of Radar Rainfall Using 3-D-Convolutional Neural Networks}, series = {IEEE Transactions on Geoscience and Remote Sensing}, volume = {62}, journal = {IEEE Transactions on Geoscience and Remote Sensing}, doi = {10.1109/TGRS.2024.3371577}, pages = {1 -- 10}, abstract = {Weather radars are highly sophisticated tools for quantitative precipitation estimation (QPE) and provide observations with unmatched spatial representativeness. However, their indirect measurement of precipitation high above ground leads to strong systematic errors compared to direct rain gauge measurements. Additionally, the temporal undersampling from 5-min instantaneous radar measurements requires advection correction. We present ResRadNet, a 3-D-convolutional residual neural network approach, to reduce these errors and, at the same time, increase the temporal resolution of the radar rainfall fields by a 5-min short-range prediction of 1-min time-steps. The network is trained to process spatiotemporal sequences of radar rainfall estimates from a composite product derived from 17 C-band weather radars in Germany. In contrast to previous approaches, we present a method that emphasizes the generation of spatiotemporally consistent and advection-corrected country-wide rainfall maps. Our approach significantly increased the Pearson correlation coefficient (PCC) of the radar product (from 0.63 to 0.74) and decreased the root mean squared error (mse) by 22\% when compared to 247 rain gauges at a 5-min resolution. An additional large-scale comparison to eight years of data from 1138 independent manual daily gauges confirmed that the improvement is robust and transferable to new locations. Overall, our study shows the benefits of using 3-D convolutional neural networks (CNNs) for weather radar rainfall estimation to provide 1-min, ground-adjusted, that is, bias-corrected with respect to on-ground sensors, and advection-corrected radar rainfall estimates.}, language = {en} } @article{MenzelKammlerConradetal., author = {Menzel, Andreas and Kammler, Martin and Conrad, E. H. and Yeh, V. and Hupalo, Myron and Tringides, Michael C.}, title = {Kinetics measurements of Pb island growth on Si(111)}, series = {Physical Review B}, volume = {67}, journal = {Physical Review B}, number = {16}, publisher = {American Physical Society}, doi = {10.1103/PhysRevB.67.165314}, abstract = {We present the results of kinetics experiments on quantum-size-effects (QSE) Pb islands formed on Si(111). We have looked at the evolution of seven-layer Pb islands from five-layer Pb islands due to the transport of Pb atoms from the interisland region, overcoming a barrier at the island edges, and moving to the island tops. By analyzing low-energy electron-diffraction and scanning-tunneling microscopy data, we have estimated the barrier for layer formation in this system to be ∼0.32eV. This energy is much larger than that expected from QSE electronic contributions alone.}, language = {en} } @inproceedings{HecknerFuchsRaabetal., author = {Heckner, Markus and Fuchs, Markus and Raab, F. and Wolff, Christian}, title = {Monitoring students' mobile app coding behavior data analysis based on IDE and browser interaction logs}, series = {IEEE Global Engineering Education Conference, EDUCON, 03-05 April 2014, Istanbul, Turkey}, booktitle = {IEEE Global Engineering Education Conference, EDUCON, 03-05 April 2014, Istanbul, Turkey}, publisher = {IEEE}, doi = {10.1109/EDUCON.2014.6826202}, pages = {892 -- 899}, abstract = {This paper describes a case study of assessing student's coding behavior and skills in a realistic development setting. Students had to solve typical programming problems in the context of app development for the Android platform using the Eclipse IDE. Data was analyzed using IDE as well as browser interaction logs. In addition, screen recordings of the students' interaction with the IDE provide further insight. In this paper we present the first results of our ongoing work.}, language = {en} } @inproceedings{YoshiokaSehrDelcroixetal., author = {Yoshioka, Takuya and Sehr, Armin and Delcroix, Marc and Kinoshita, Keisuke and Maas, Roland and Nakatani, Tomohiro and Kellermann, Walter}, title = {Survey on approaches to speech recognition in reverberant environments}, series = {Asia-Pacific Signal \& Information Processing Association annual summit and conference (APSIPA ASC), 2012 : Hollywood, California, USA, 3 - 6 Dec. 2012}, booktitle = {Asia-Pacific Signal \& Information Processing Association annual summit and conference (APSIPA ASC), 2012 : Hollywood, California, USA, 3 - 6 Dec. 2012}, publisher = {IEEE}, isbn = {978-0-6157-0050-2}, abstract = {This paper overviews the state of the art in reverberant speech processing from the speech recognition viewpoint. First, it points out that the key to successful reverberant speech recognition is to account for long-term dependencies between reverberant observations obtained from consecutive time frames. Then, a diversity of approaches that exploit the long-term dependencies in various ways is described, ranging from signal and feature dereverberation to acoustic model compensation tailored to reverberation. A framework for classifying those approaches is presented to highlight similarities and differences between them.}, language = {en} } @inproceedings{KammlerHornvonHoegenVossetal., author = {Kammler, Martin and Horn- von Hoegen, Michael and Voss, N. and Tringides, Michael C. and Menzel, Andreas and Conrad, E. H.}, title = {Surface Dynamics of Stepped Si(001) Studied by Temporal Leed Spectroscopy}, series = {Collective Diffusion on Surfaces: Correlation Effects and Adatom Interactions (NATO Science Series II: Mathematics, Physics and Chemistry}, volume = {29}, booktitle = {Collective Diffusion on Surfaces: Correlation Effects and Adatom Interactions (NATO Science Series II: Mathematics, Physics and Chemistry}, publisher = {Springer}, doi = {10.1007/978-94-010-0816-7_3}, pages = {23 -- 32}, abstract = {We present the first demonstration of Temporal LEED Spectroscopy's ability to measure surface dynamics as shown by a study of step dynamics on vicinal Si(001). While we measure activation energies consistent with other work, the observed microscopic mechanism driving the fluctuations is inconsistent with previous claims. We exclude evaporation/condensation of atoms from the steps as the rate limiting kinetics in the temperature range of this experiment. Possible reasons for these differences are discussed.}, language = {en} } @inproceedings{AltenbergerNallaNosteretal., author = {Altenberger, Igor and Nalla, Ravi K. and Noster, Ulf and Liu, G.Y. and Scholtes, Berthold and Ritchie, Robert O.}, title = {Effects of Deep Rolling on the Fatigue Behavior of Ti-6Al-4V at Ambient and Elevated Temperatures}, series = {Ti-2003 Science and Technology, Proceedings of the 10th World Conference on Titanium, held at the CCH-Congress Center Hamburg, Germany 13-18 July 2003, Vol 1}, booktitle = {Ti-2003 Science and Technology, Proceedings of the 10th World Conference on Titanium, held at the CCH-Congress Center Hamburg, Germany 13-18 July 2003, Vol 1}, editor = {L{\"u}tjering, G. and Albrecht, J.}, publisher = {Wiley}, organization = {Wiley}, isbn = {3-527-30306-5}, pages = {1059 -- 1066}, language = {en} } @article{EnglertAngeleFierlbecketal., author = {Englert, Carsten and Angele, Peter and Fierlbeck, J. and Dendorfer, Sebastian and Schubert, T. and M{\"u}ller, R. and Lienhard, S. and Zellner, Johannes and Nerlich, Michael and Neumann, Carsten}, title = {Conductive bone substitute material with variable antibiotic delivery}, series = {Der Unfallchirurg}, volume = {110}, journal = {Der Unfallchirurg}, number = {5}, publisher = {Springer}, doi = {10.1007/s00113-007-1229-3}, pages = {408 -- 413}, abstract = {A new bone substitute, consisting of hydroxylapatite and calcium sulphate, was prepared in two formulations and analysed for its mechanical strength and antibiotic elution.The bone substitute PerOssal has osteoconductive and degradable properties. The material has a built-in capillary structure, which results in an immediate fluid uptake. Antibiotics absorbed to the bone substitute resulted in a prolonged release rate. Mechanical strength was investigated by an unconfined compression test up to failure under both wet and dry conditions for both formulations of the bone substitute. Antibiotic release was analysed microbiologically for two antibiotics, vancomycin and gentamicin, over an elution period of 10 days using the agar diffusion method.The drug release analysis resulted in a prolonged release rate of both antibiotics over 10 days. In vitro the amount of gentamicin and vancomycin eluted at day 10. From one pellet still exceeded the minimal inhibitory concentration of most aetiologically important pathogens. Formulation two of the present bone substitute is significantly harder in both wet and dry conditions when compared to formulation one. Both formulations lose strength in the wet condition relative to their performance in the dry condition. However, formulation two is as hard under wet conditions as formulation one is when dry.PerOssal is a suitable new degradable osteoconductive bone substitute that can be loaded with antibiotic solutions, which are released in effective doses over 10 days. The mechanical strength of PerOssal is sufficient to support cancellous bone defects in non-weight-bearing areas or in combination with osteosynthesis.}, subject = {Knochenersatz}, language = {en} } @article{StichelFrickLaumeretal., author = {Stichel, Thomas and Frick, Thomas and Laumer, Tobias and Tenner, Felix and Hausotte, Tino and Merklein, Marion and Schmidt, Michael}, title = {A Round Robin study for Selective Laser Sintering of polyamide 12: Microstructural origin of the mechanical properties}, series = {Optics \& Laser Technology}, volume = {89}, journal = {Optics \& Laser Technology}, publisher = {Elsevier}, doi = {10.1016/j.optlastec.2016.09.042}, pages = {31 -- 40}, abstract = {The mechanical and microstructural investigation of polymer parts (polyamide 12) fabricated by Selective Laser Sintering as part of a Round Robin initiative is presented. The paper focuses on the microstructural analysis of the Round Robin samples and their evaluation regarding their effect on mechanical properties with respect to each other. Therefore optical microscopy on microtomed samples, X-ray computed tomography and Differential Scanning Calorimetry is used to determine the morphology of residual particle cores and of internal pores.}, language = {en} } @techreport{HoellerQuirtMahnetal., author = {H{\"o}ller, Christoph and Quirt, David and Mahn, Jeffrey and M{\"u}ller-Trapet, Markus}, title = {Guide to calculating airborne sound transmission in buildings}, edition = {5th edition}, publisher = {National Research Council of Canada. Construction}, doi = {10.4224/40001814}, abstract = {In recent years, the science and engineering for controlling sound transmission in buildings have shifted from a focus on individual assemblies such as walls or floors, to a focus on performance of the complete system. Standardized procedures for calculating the overall transmission, combined with standardized measurements to characterize sub-assemblies, provide much better prediction of sound transmission between adjacent indoor spaces. The International Standards Organization (ISO) has published a calculation method, ISO 15712-1 that uses laboratory test data for sub-assemblies such as walls and floors as inputs for a detailed procedure to calculate the expected sound transmission between adjacent rooms in a building. This standard works very well for some types of construction, but to use it in a North American context one must overcome two obstacles - incompatibility with the ASTM standards used by our construction industry, and low accuracy of its predictions for lightweight wood or steel frame construction. To bypass limitations of ISO 15712-1, this Guide explains how to merge ASTM and ISO test data in the ISO calculation procedure, and provides recommendations for applying extended measurement and calculation procedures for specific common types of construction. This Guide was developed in a project established by the National Research Council of Canada to support the transition of construction industry practice to using apparent sound transmission class (ASTC) for sound control objectives in the National Building Code of Canada (NBCC). However, the potential range of application goes beyond the minimum requirements of the NBCC - the Guide also facilitates design to provide enhanced sound insulation, and should be generally applicable to construction in both Canada and the USA. This publication contains a limited set of examples for several types of construction, to provide an introduction and overview of the ASTC calculation procedure. Additional examples and measurement data can be found in the companion documents to this Guide, namely NRC Research Reports RR-333 to RR-337. Furthermore, the calculation procedure outlined and illustrated in this Guide is also used by the software web application soundPATHS, which is available for free on the website of the National Research Council of Canada (see the references in Section 7 of this Guide for access details). Au cours des derni{\`e}res ann{\´e}es, les scientifiques et les ing{\´e}nieurs ont fait porter leurs efforts en mati{\`e}re d'att{\´e}nuation de la transmission du son dans les b{\^a}timents davantage sur le rendement du syst{\`e}me dans sa totalit{\´e} que sur les ensembles de construction individuels. Les m{\´e}thodes normalis{\´e}es de calcul de la transmission globale, combin{\´e}es {\`a} des mesures normalis{\´e}es de caract{\´e}risation des sous-ensembles, permettent de mieux pr{\´e}dire la transmission du son entre des espaces int{\´e}rieurs adjacents. L'Organisation internationale de normalisation (ISO) a publi{\´e} une m{\´e}thode de calcul, la norme ISO 15712-1, qui utilise des donn{\´e}es d'essai en laboratoire pour les sous-ensembles, comme les murs et les planchers, comme donn{\´e}es d'entr{\´e}e en vue d'une m{\´e}thode d{\´e}taill{\´e}e de calcul de la transmission du son pr{\´e}vue entre des pi{\`e}ces adjacentes dans un b{\^a}timent. Cette norme fonctionne tr{\`e}s bien pour certains types de construction, mais pour l'utiliser dans un contexte nord-am{\´e}ricain, il faut surmonter deux obstacles - l'incompatibilit{\´e} avec les normes ASTM utilis{\´e}es par notre industrie de la construction et la faible exactitude de ses pr{\´e}visions pour la construction {\`a} ossature de bois ou d'acier l{\´e}g{\`e}re. Pour contourner les limites de la norme ISO 15712-1, le pr{\´e}sent guide explique comment fusionner les donn{\´e}es d'essai de l'ISO et de l'ASTM dans la m{\´e}thode de calcul de l'ISO, et formule des recommandations relativement {\`a} l'application de m{\´e}thodes {\´e}largies de mesure et de calcul pour des types de construction courants. Le pr{\´e}sent guide a {\´e}t{\´e} {\´e}labor{\´e} dans le cadre d'un projet mis sur pied par le Conseil national de recherches du Canada afin d'appuyer la transition de la pratique de l'industrie de la construction vers l'utilisation d'un indice de transmission du son apparent (ITSA) satisfaisant aux objectifs de r{\´e}duction rigoureux du Code national du b{\^a}timent du Canada (CNBC). Toutefois, l'{\´e}ventail potentiel d'applications va au-del{\`a} des exigences minimales du CNBC - le Guide facilite aussi une conception visant {\`a} am{\´e}liorer l'insonorisation et devrait s'appliquer de fa{\c{c}}on g{\´e}n{\´e}rale {\`a} la construction tant au Canada qu'aux {\´E}tats-Unis. La pr{\´e}sente publication contient un ensemble limit{\´e} d'exemples pour plusieurs types de construction, afin de fournir une introduction et un aper{\c{c}}u de la m{\´e}thode de calcul de l'ITSA. On trouvera d'autres exemples et donn{\´e}es de mesure dans les documents d'accompagnement du pr{\´e}sent guide, {\`a} savoir, les rapports de recherche RR-333 {\`a} RR-337 du CNRC. De plus, la m{\´e}thode de calcul d{\´e}crite et illustr{\´e}e dans le pr{\´e}sent guide est {\´e}galement utilis{\´e}e par l'application Web soundPATHS, disponible gratuitement sur le site Web du Conseil national de recherches du Canada (voir les r{\´e}f{\´e}rences {\`a} la section 7 du pr{\´e}sent guide pour les d{\´e}tails d'acc{\`e}s).}, language = {en} } @inproceedings{ShymanovichNicoulLuetal., author = {Shymanovich, Uladzimir and Nicoul, Matthieu and Lu, Wei and Tarasevitch, A. and Kammler, Martin and Horn-von Hoegen, Michael and von der Linde, D. and Sokolowski-Tinten, Klaus and Phipps, Claude}, title = {Coherent acoustic and optical phonons in laser-excited solids studied by ultrafast time-resolved X-ray diffraction}, series = {AIP Conference Proceedings}, booktitle = {AIP Conference Proceedings}, number = {1}, publisher = {AIP}, doi = {10.1063/1.3507146}, pages = {558 -- 566}, abstract = {We apply ultrafast time-resolved X-ray diffraction to directly study coherent acoustic and optical phonons in laser-excited materials. In Au the ps acoustic response has been investigated with the particular goal to clarify the interplay of electronic and thermal pressure contributions. In Bi the extreme softening of the coherently excited A 1 g optical phonon presents strong indication that upon intense laser-excitation the Peierls-transition which determines the equilibrium structure of Bi can be reversed. In FeRh we studied the lattice response after a fast laser-induced anti-ferromagnetic to ferromagnetic phase transition.}, language = {en} } @techreport{HoellerQuirtMuellerTrapet, author = {H{\"o}ller, Christoph and Quirt, David and Mueller-Trapet, Markus}, title = {Apparent sound insulation in wood-framed buildings}, publisher = {National Research Council of Canada. Construction}, doi = {10.4224/23002820}, abstract = {This Report presents the results from substantial experimental studies of sound transmission, together with an explanation of calculation procedures to predict the sound transmission between adjacent spaces in a building with wood-framed walls and floors. This Report presents two types of experimental data for wood-framed constructions: - Test data for direct sound transmission through typical wood-framed wall assemblies and wood-framed floor assemblies, plus a summary of trends for such constructions and references to compilations of additional data - Test data for flanking sound transmission measured following the procedures of ISO 10848 for coupled wall/floor junctions and wall/wall junctions Worked examples for calculating the apparent sound transmission class (ASTC) rating between adjacent dwelling units are presented to illustrate how the experimental data can be applied.}, language = {en} }