TY - JOUR A1 - Müller, Tim M. A1 - Leise, Philipp A1 - Lorenz, Imke-Sophie A1 - Altherr, Lena A1 - Pelz, Peter F. T1 - Optimization and validation of pumping system design and operation for water supply in high-rise buildings JF - Optimization and Engineering N2 - The application of mathematical optimization methods for water supply system design and operation provides the capacity to increase the energy efficiency and to lower the investment costs considerably. We present a system approach for the optimal design and operation of pumping systems in real-world high-rise buildings that is based on the usage of mixed-integer nonlinear and mixed-integer linear modeling approaches. In addition, we consider different booster station topologies, i.e. parallel and series-parallel central booster stations as well as decentral booster stations. To confirm the validity of the underlying optimization models with real-world system behavior, we additionally present validation results based on experiments conducted on a modularly constructed pumping test rig. Within the models we consider layout and control decisions for different load scenarios, leading to a Deterministic Equivalent of a two-stage stochastic optimization program. We use a piecewise linearization as well as a piecewise relaxation of the pumps’ characteristics to derive mixed-integer linear models. Besides the solution with off-the-shelf solvers, we present a problem specific exact solving algorithm to improve the computation time. Focusing on the efficient exploration of the solution space, we divide the problem into smaller subproblems, which partly can be cut off in the solution process. Furthermore, we discuss the performance and applicability of the solution approaches for real buildings and analyze the technical aspects of the solutions from an engineer’s point of view, keeping in mind the economically important trade-off between investment and operation costs. KW - Technical Operations Research KW - MINLP KW - MILP KW - Experimental validation KW - Pumping systems Y1 - 2020 U6 - https://doi.org/10.1007/s11081-020-09553-4 SN - 1573-2924 VL - 2021 IS - 22 SP - 643 EP - 686 PB - Springer ER - TY - CHAP A1 - Müller, Tim M. A1 - Altherr, Lena A1 - Leise, Philipp A1 - Pelz, Peter F. T1 - Optimization of pumping systems for buildings: Experimental validation of different degrees of model detail on a modular test rig T2 - Operations Research Proceedings 2019 N2 - Successful optimization requires an appropriate model of the system under consideration. When selecting a suitable level of detail, one has to consider solution quality as well as the computational and implementation effort. In this paper, we present a MINLP for a pumping system for the drinking water supply of high-rise buildings. We investigate the influence of the granularity of the underlying physical models on the solution quality. Therefore, we model the system with a varying level of detail regarding the friction losses, and conduct an experimental validation of our model on a modular test rig. Furthermore, we investigate the computational effort and show that it can be reduced by the integration of domain-specific knowledge. KW - Experimental validation KW - MINLP KW - Engineering optimization KW - Water supply system KW - Network design Y1 - 2020 SN - 978-3-030-48438-5 U6 - https://doi.org/10.1007/978-3-030-48439-2_58 N1 - Annual International Conference of the German Operations Research Society (GOR), Dresden, Germany, September 4-6, 2019 SP - 481 EP - 488 PB - Springer CY - Cham ER - TY - JOUR A1 - Altherr, Lena A1 - Leise, Philipp A1 - Pfetsch, Marc E. A1 - Schmitt, Andreas T1 - Algorithmic design and resilience assessment of energy efficient high-rise water supply systems JF - Applied Mechanics and Materials N2 - High-rise water supply systems provide water flow and suitable pressure in all levels of tall buildings. To design such state-of-the-art systems, the consideration of energy efficiency and the anticipation of component failures are mandatory. In this paper, we use Mixed-Integer Nonlinear Programming to compute an optimal placement of pipes and pumps, as well as an optimal control strategy.Moreover, we consider the resilience of the system to pump failures. A resilient system is able to fulfill a predefined minimum functionality even though components fail or are restricted in their normal usage. We present models to measure and optimize the resilience. To demonstrate our approach, we design and analyze an optimal resilient decentralized water supply system inspired by a real-life hotel building. KW - MINLP KW - Buffering Capacity KW - Uncertainty KW - Water Supply Networks KW - Booster Stations Y1 - 2018 U6 - https://doi.org/10.4028/www.scientific.net/AMM.885.211 SN - 1662-7482 VL - 885 SP - 211 EP - 223 PB - Trans Tech Publications CY - Bäch ER - TY - JOUR A1 - Zabirov, Alexander A1 - Schleser, Markus A1 - Bucherer, Sebastian T1 - Füge- und Dichtkonzept für einen Leichtbauverbrennungsmotor JF - adhäsion KLEBEN & DICHTEN Y1 - 2021 U6 - https://doi.org/10.1007/s35145-021-0531-5 SN - 2192-8681 VL - 65 IS - 11 SP - 12 EP - 19 PB - Springer Nature CY - Cham ER - TY - CHAP A1 - Pfetsch, Marc E. A1 - Abele, Eberhard A1 - Altherr, Lena A1 - Bölling, Christian A1 - Brötz, Nicolas A1 - Dietrich, Ingo A1 - Gally, Tristan A1 - Geßner, Felix A1 - Groche, Peter A1 - Hoppe, Florian A1 - Kirchner, Eckhard A1 - Kloberdanz, Hermann A1 - Knoll, Maximilian A1 - Kolvenbach, Philip A1 - Kuttich-Meinlschmidt, Anja A1 - Leise, Philipp A1 - Lorenz, Ulf A1 - Matei, Alexander A1 - Molitor, Dirk A. A1 - Niessen, Pia A1 - Pelz, Peter F. A1 - Rexer, Manuel A1 - Schmitt, Andreas A1 - Schmitt, Johann M. A1 - Schulte, Fiona A1 - Ulbrich, Stefan A1 - Weigold, Matthias T1 - Strategies for mastering uncertainty T2 - Mastering uncertainty in mechanical engineering N2 - This chapter describes three general strategies to master uncertainty in technical systems: robustness, flexibility and resilience. It builds on the previous chapters about methods to analyse and identify uncertainty and may rely on the availability of technologies for particular systems, such as active components. Robustness aims for the design of technical systems that are insensitive to anticipated uncertainties. Flexibility increases the ability of a system to work under different situations. Resilience extends this characteristic by requiring a given minimal functional performance, even after disturbances or failure of system components, and it may incorporate recovery. The three strategies are described and discussed in turn. Moreover, they are demonstrated on specific technical systems. Y1 - 2021 SN - 978-3-030-78353-2 U6 - https://doi.org/10.1007/978-3-030-78354-9_6 N1 - Part of the Springer Tracts in Mechanical Engineering book series (STME) SP - 365 EP - 456 PB - Springer CY - Cham ER - TY - JOUR A1 - Olbertz, Klaus T1 - Wichtige arbeitsrechtliche Entwicklungen im Jahr 2020 : Der Jahresrückblick auf alles Wissenswerte im Arbeitsrecht des vergangenen Jahres JF - NWB - Steuer- und Wirtschaftsrecht N2 - Im Anschluss an die arbeitsrechtlichen Jahresübersichten der vergangenen Jahre (NWB 5/2019 S. 266; NWB 8/2020 S. 557) gibt der nachfolgende Beitrag einen Überblick über relevante Entwicklungen im Arbeitsrecht des Jahres 2020. Der erste Teil beschäftigt sich hierbei mit gesetzlichen Änderungen. Neben Regelungen, die auf die COVID-19-Pandemie zurückgeführt werden können, hat der Gesetzgeber auch andere Vorhaben umgesetzt. So wurde u. a. das Arbeitnehmerentsenderecht reformiert. Für Diskussionen sorgt(e) zudem das Gesetzesvorhaben zur Regelung mobiler Arbeit. Im zweiten Teil werden für die Praxis wichtige höchstrichterliche Gerichtsentscheidungen zum Arbeitsrecht erläutert, alphabetisch sortiert von A (wie Antidiskriminierungsrecht) bis U (wie Urlaub). Y1 - 2021 SN - 0028-3460 IS - 10 SP - 703 EP - 715 ER - TY - JOUR A1 - Olbertz, Klaus T1 - Die Flexibilisierung von Arbeitszeit durch den Abruf von Arbeit : Möglichkeiten und Grenzen arbeitsvertraglicher Gestaltung zur Vermeidung von „Leerlaufzeiten“ JF - NWB - Steuer- und Wirtschaftsrecht N2 - Die Arbeitswelt ist im Umbruch. Der Bedarf an flexiblen Arbeitszeitmodellen nimmt stetig zu, wobei die Corona-Pandemie dieses Bedürfnis nochmals verschärft hat. Gerade auch in kleineren und mittleren Unternehmen wächst die Notwendigkeit, den Einsatz der Beschäftigten möglichst bedarfsgerecht zu steuern, also bei guter Auftragslage mehr Arbeitszeit abzurufen und bei ausbleibenden Aufträgen die Arbeitszeit zu reduzieren und somit bezahlte „Leerlaufzeiten“ zu vermeiden. Der Gesetzgeber stellt den Arbeitgebern hierfür das Instrument der sog. Abrufarbeit ( § 12 Teilzeit- und Befristungsgesetz – TzBfG ) zur Verfügung. In dem nachfolgenden Beitrag werden Möglichkeiten und Grenzen der Abrufarbeit skizziert und konkrete arbeitsvertragliche Gestaltungsmöglichkeiten aufgezeigt. Y1 - 2021 SN - 0028-3460 IS - 15 SP - 1055 EP - 1063 ER - TY - JOUR A1 - Olbertz, Klaus T1 - Vertragsgestaltungen bei der Beschäftigung von Rentnern in Unternehmen : (Befristete) Beschäftigungsverhältnisse als sinnvolles Instrument zum Schließen von Personallücken JF - NWB - Steuer- und Wirtschaftsrecht Y1 - 2021 SN - 0028-3460 IS - 25 SP - 1810 EP - 1817 ER - TY - GEN A1 - Olbertz, Klaus T1 - Sozialversicherungspflicht eines Minderheitsgesellschafter-Geschäftsführers einer Familiengesellschaft T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Beschluss des LSG Niedersachsen-Bremen v. 20.12.2018 – L 12 BA 23/18 B ER IS - 3 SP - 48 EP - 48 ER - TY - GEN A1 - Olbertz, Klaus T1 - Kein Anspruch des Arbeitnehmers auf Verzugspauschale bei Lohnverzug des Arbeitgebers T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Urteil des BAG v. 25.09.2018 – 8 AZR 26/18 IS - 4 SP - 75 EP - 75 ER - TY - GEN A1 - Olbertz, Klaus T1 - Kirchenmitgliedschaft als Einstellungskriterium T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Urteil des BAG v. 25.10.2018 – 8 AZR 501/14 IS - 6 SP - 111 EP - 111 ER - TY - GEN A1 - Olbertz, Klaus T1 - Zuordnung von befristet versetzten Arbeitnehmern zu einem übergehenden Betriebsteil T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Urteil des LAG Köln v. 04.12.2018 – 4 Sa 962/17 IS - 7 SP - 132 EP - 132 ER - TY - GEN A1 - Olbertz, Klaus T1 - Keine sachgrundlose Befristung bei acht Jahre zurückliegender Vorbeschäftigung T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Urteil des BAG v. 23.01.2019 – 7 AZR 733/16 IS - 11 SP - 201 EP - 201 ER - TY - GEN A1 - Olbertz, Klaus T1 - Vorlagebeschluss – Kopftuchverbot erneut vor dem EuGH T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Beschluss des BAG v. 30.01.2019 – 10 AZR 299/18 IS - 11 SP - 203 EP - 203 ER - TY - JOUR A1 - Braun, Sebastian A1 - Cheng, Chi-Tsun A1 - Dowey, Steve A1 - Wollert, Jörg T1 - Performance evaluation of skill-based order-assignment in production environments with multi-agent systems JF - IEEE Journal of Emerging and Selected Topics in Industrial Electronics N2 - The fourth industrial revolution introduces disruptive technologies to production environments. One of these technologies are multi-agent systems (MASs), where agents virtualize machines. However, the agent's actual performances in production environments can hardly be estimated as most research has been focusing on isolated projects and specific scenarios. We address this gap by implementing a highly connected and configurable reference model with quantifiable key performance indicators (KPIs) for production scheduling and routing in single-piece workflows. Furthermore, we propose an algorithm to optimize the search of extrema in highly connected distributed systems. The benefits, limits, and drawbacks of MASs and their performances are evaluated extensively by event-based simulations against the introduced model, which acts as a benchmark. Even though the performance of the proposed MAS is, on average, slightly lower than the reference system, the increased flexibility allows it to find new solutions and deliver improved factory-planning outcomes. Our MAS shows an emerging behavior by using flexible production techniques to correct errors and compensate for bottlenecks. This increased flexibility offers substantial improvement potential. The general model in this paper allows the transfer of the results to estimate real systems or other models. KW - cyber-physical production systems KW - event-based simulation KW - multi-agent systems KW - digital factory KW - industrial agents Y1 - 2021 U6 - https://doi.org/10.1109/JESTIE.2021.3108524 SN - 2687-9735 IS - Early Access PB - IEEE CY - New York ER - TY - JOUR A1 - Jahnke, Siegfried A1 - Roussel, Johanna A1 - Hombach, Thomas A1 - Kochs, Johannes A1 - Fischbach, Andreas A1 - Huber, Gregor A1 - Scharr, Hanno T1 - phenoSeeder - A robot system for automated handling and phenotyping of individual seeds JF - Plant physiology N2 - The enormous diversity of seed traits is an intriguing feature and critical for the overwhelming success of higher plants. In particular, seed mass is generally regarded to be key for seedling development but is mostly approximated by using scanning methods delivering only two-dimensional data, often termed seed size. However, three-dimensional traits, such as the volume or mass of single seeds, are very rarely determined in routine measurements. Here, we introduce a device named phenoSeeder, which enables the handling and phenotyping of individual seeds of very different sizes. The system consists of a pick-and-place robot and a modular setup of sensors that can be versatilely extended. Basic biometric traits detected for individual seeds are two-dimensional data from projections, three-dimensional data from volumetric measures, and mass, from which seed density is also calculated. Each seed is tracked by an identifier and, after phenotyping, can be planted, sorted, or individually stored for further evaluation or processing (e.g. in routine seed-to-plant tracking pipelines). By investigating seeds of Arabidopsis (Arabidopsis thaliana), rapeseed (Brassica napus), and barley (Hordeum vulgare), we observed that, even for apparently round-shaped seeds of rapeseed, correlations between the projected area and the mass of seeds were much weaker than between volume and mass. This indicates that simple projections may not deliver good proxies for seed mass. Although throughput is limited, we expect that automated seed phenotyping on a single-seed basis can contribute valuable information for applications in a wide range of wild or crop species, including seed classification, seed sorting, and assessment of seed quality. Y1 - 2016 U6 - https://doi.org/10.1104/pp.16.01122 SN - 0032-0889 VL - 172 IS - 3 SP - 1358 EP - 1370 PB - Oxford University Press CY - Oxford ER - TY - JOUR A1 - Wrede, Oliver T1 - Continuity in travel information JF - Information Design Journal N2 - This article discusses the contrast between the information transportation companies provide to travellers and that of their brand messaging. Companies’ brand messaging often portrays the service they provide as pleasant, stress free and perfect. Customers and users of the service, on the other hand, often describe their experience of the service as a negative one. This article suggests that the brand value would be greater if transportation companies paid more attention to the users’ experience when designing their information systems, particularly in worst case scenarios. Y1 - 2016 U6 - https://doi.org/10.1075/idj.22.2.09wre SN - 0142-5471 N1 - Gedruckt vorhanden in der Bereichsbibliothek Boxgraben unter 53 Z 971-2016 (Magazin) VL - 22 IS - 2 SP - 172 EP - 178 PB - John Benjamins CY - Amsterdam ER - TY - JOUR A1 - Neu, Eugen A1 - Janser, Frank A1 - Khatibi, Akbar A. A1 - Orifici, Adrian C. T1 - Fully Automated Operational Modal Analysis using multi-stage clustering JF - Mechanical Systems and Signal Processing Y1 - 2017 U6 - https://doi.org/10.1016/j.ymssp.2016.07.031 SN - 0888-3270 VL - Vol. 84, Part A SP - 308 EP - 323 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Reger, V. A1 - Döring, Bernd A1 - Kuhnhenne, M. T1 - Passive und aktive Maßnahmen zur Flächenkühlung im Stahl(leicht)bau JF - Bauingenieur N2 - Mit steigenden Dämmstandards und höheren Komfortanforderungen der Nutzer gerät die Problematik der sommerlichen Überhitzung zunehmend in den Fokus. Um die Überhitzung möglichst gering zu halten, sind Maßnahmen und Lösungen zu entwickeln, die den potenziellen Kühlbedarf eines Gebäudes vermeiden sowie reduzieren. Im Rahmen des europäischen Forschungsprojektes BATIMASS wurden Techniken untersucht, die die sommerliche Raumtemperatur ohne zusätzliche Kühlung (passiv) oder aber mit energieeffizienter wasserbasierter Flächenkühlung (aktiv) reduzieren und die besonders für Gebäude in Stahl(leicht)bauweise geeignet sind. Dafür wurde die Methodik der thermisch äquivalenten Decke weiterentwickelt, um das thermische Verhalten von Profilblechdecken in Gebäuden für beide Lösungsansätze analysieren zu können. Darüber hinaus wurde der Einsatz von Phasenwechselmaterial (PCM) zur Steigerung der Speicherfähigkeit von leichten Decken mit besonders geringer thermischer Masse in Simulationen sowie im Labor untersucht und bewertet. Y1 - 2016 U6 - https://doi.org/10.37544/0005-6650-2016-07-08-63 SN - 0005-6650 N1 - gedruckt in der Bereichsbibliothek Bayernallee unter der Signatur 13 Z 049 VL - 91 IS - Jul/Aug SP - 309 EP - 316 PB - VDI Fachmedien CY - Düsseldorf ER - TY - CHAP A1 - Kessler, Julia A1 - Balc, Nicolae A1 - Gebhardt, Andreas A1 - Abbas, Karim T1 - Basic research on lattice structures focused on the reliance of the cross sectional area and additional coatings T2 - The 4th International Conference on Computing and Solutions in Manufacturing Engineering 2016 – CoSME’16 Y1 - 2017 U6 - https://doi.org/10.1051/matecconf/20179403008 N1 - MATEC Web Conf. Vol 94, 2017, 03008 MATEC Web of Conferences 94, 03008 (2017) ET - Vol. 94 ER - TY - BOOK A1 - Lauth, Jakob A1 - Kowalczyk, Jürgen T1 - Thermodynamik : eine Einführung Y1 - 2015 SN - 978-3-662-46228-7 U6 - https://doi.org/10.1007/978-3-662-46229-4 PB - Springer Spektrum CY - Berlin ER - TY - CHAP A1 - Lind, Thorsten Patric T1 - Wirkungen der Eröffnung des Insolvenzverfahrens : §§ 129, 132, 133, 144, 145 T2 - Bankenkommentar zum Insolvenzrecht. - 3. Auflage Y1 - 2016 SN - 978-3-95725-016-2 SP - 1277 EP - 1767 PB - Finanz Colloquium CY - Heidelberg ER - TY - JOUR A1 - Funke, Harald A1 - Keinz, Jan A1 - Kusterer, Karsten A1 - Ayed, Anis Haj A1 - Kazari, Masahide A1 - Kitajima, Junichi A1 - Horikawa, Atsushi A1 - Okada, Kunio T1 - Experimental and Numerical Study on Optimizing the Dry Low NOₓ Micromix Hydrogen Combustion Principle for Industrial Gas Turbine Applications JF - Journal of Thermal Science and Engineering Applications N2 - Combined with the use of renewable energy sources for its production, hydrogen represents a possible alternative gas turbine fuel for future low-emission power generation. Due to the difference in the physical properties of hydrogen compared to other fuels such as natural gas, well-established gas turbine combustion systems cannot be directly applied to dry low NOₓ (DLN) hydrogen combustion. The DLN micromix combustion of hydrogen has been under development for many years, since it has the promise to significantly reduce NOₓ emissions. This combustion principle for air-breathing engines is based on crossflow mixing of air and gaseous hydrogen. Air and hydrogen react in multiple miniaturized diffusion-type flames with an inherent safety against flashback and with low NOₓ emissions due to a very short residence time of the reactants in the flame region. The paper presents an advanced DLN micromix hydrogen application. The experimental and numerical study shows a combustor configuration with a significantly reduced number of enlarged fuel injectors with high-thermal power output at constant energy density. Larger fuel injectors reduce manufacturing costs, are more robust and less sensitive to fuel contamination and blockage in industrial environments. The experimental and numerical results confirm the successful application of high-energy injectors, while the DLN micromix characteristics of the design point, under part-load conditions, and under off-design operation are maintained. Atmospheric test rig data on NOₓ emissions, optical flame-structure, and combustor material temperatures are compared to numerical simulations and show good agreement. The impact of the applied scaling and design laws on the miniaturized micromix flamelets is particularly investigated numerically for the resulting flow field, the flame-structure, and NOₓ formation. Y1 - 2016 U6 - https://doi.org/10.1115/1.4034849 SN - 1948-5093 N1 - TSEA-15-1227 VL - 9 IS - 2 SP - 021001 EP - 021001-10 PB - ASME CY - New York, NY ER - TY - JOUR A1 - Ayed, Anis Haj A1 - Kusterer, Karsten A1 - Funke, Harald A1 - Keinz, Jan T1 - CFD Based Improvement of the DLN Hydrogen Micromix Combustion Technology at Increased Energy Densities JF - American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) N2 - Combined with the use of renewable energy sources for its production, Hydrogen represents a possible alternative gas turbine fuel within future low emission power generation. Due to the large difference in the physical properties of Hydrogen compared to other fuels such as natural gas, well established gas turbine combustion systems cannot be directly applied for Dry Low NOx (DLN) Hydrogen combustion. Thus, the development of DLN combustion technologies is an essential and challenging task for the future of Hydrogen fuelled gas turbines. The DLN Micromix combustion principle for hydrogen fuel has been developed to significantly reduce NOx-emissions. This combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type flames. The major advantages of this combustion principle are the inherent safety against flash-back and the low NOx-emissions due to a very short residence time of reactants in the flame region of the micro-flames. The Micromix Combustion technology has been already proven experimentally and numerically for pure Hydrogen fuel operation at different energy density levels. The aim of the present study is to analyze the influence of different geometry parameter variations on the flame structure and the NOx emission and to identify the most relevant design parameters, aiming to provide a physical understanding of the Micromix flame sensitivity to the burner design and identify further optimization potential of this innovative combustion technology while increasing its energy density and making it mature enough for real gas turbine application. The study reveals great optimization potential of the Micromix Combustion technology with respect to the DLN characteristics and gives insight into the impact of geometry modifications on flame structure and NOx emission. This allows to further increase the energy density of the Micromix burners and to integrate this technology in industrial gas turbines. Y1 - 2016 SN - 2313-4402 VL - 26 IS - 3 SP - 290 EP - 303 PB - GSSRR ER - TY - JOUR A1 - Thomas, Axel T1 - Genussrechte als Instrument der Unternehmensfinanzierung von kommunalen Wohnungs- baugesellschaften JF - VM Verwaltung und Management N2 - Die kommunalen Wohnungsbaugesellschaften und ihr Geschäftszweck bzw. Versorgungsauftrag erfahren aus gesamtgesellschaftlichen Gründen aktuell einen erheblichen Bedeutungszuwachs. Der kommunale Wohnungsbau soll und muss intensiviert werden, da z.B. zunehmend Wohnungsbindungen auslaufen. Bezahlbare Neubauten fehlen speziell Familien, Senioren, Studenten und Flüchtlingen. Um das Investitionsvolumen zu bewältigen, bedarf es nicht nur der Förderkredite, sondern auch der Zuführung „frischen Kapitals“. Der Beitrag stellt dar, dass Genussrechte ein interessantes und oft unbekanntes Finanzierungsinstrument für kommunale Wohnungsbaugesellschaften mit passgenauen Ausgestaltungsmöglichkeiten sind. Mit Hilfe von Genussrechten können die notwendigen Neubau-Investitionen solide mit Quasi-Eigenkapital unterlegt werden und den sozialen Wohnungsbau wiederbeleben. Genussrechte als Hybridkapital lassen sich mangels gesetzlicher Eingrenzung exakt und individuell ebenso an die Bedürfnisse der kommunalen Wohnungsbaugesellschaft anpassen wie an die der Gesellschafter und des jeweiligen Neubauvorhabens. Y1 - 2016 U6 - https://doi.org/10.5771/0947-9856-2016-6-322 SN - 0947-9856 VL - 22 IS - 6 SP - 322 EP - 327 PB - Nomos CY - Baden-Baden ER - TY - CHAP A1 - Lind, Thorsten Patric T1 - Eröffnung des Insolvenzverfahrens. Erfaßtes Vermögen und Verfahrensbeteiligte. Insolvenzverwalter, Organe der Gläubiger : §§ 56-62, 66-72, 74-79 T2 - Insolvenzrecht : Kommentar / hrsg. von Martin Ahrens; Markus Gehrlein; Andreas Ringstmeier . - 3. Auflage Y1 - 2017 SN - 978-3-472-08669-7 N1 - Früher unter dem Titel: Fachanwaltskommentar Insolvenzrecht SP - 690 - 752; 776 - 797; 802 - 818 PB - Luchterhand CY - Köln ER - TY - JOUR A1 - Orzada, Stephan A1 - Johst, Sören A1 - Maderwald, Stefan A1 - Bitz, Andreas A1 - Solbach, Klaus A1 - Ladd, Mark E. T1 - Mitigation of B1(+) inhomogeneity on single-channel transmit systems with TIAMO JF - Magnetic Resonance in Medicine Y1 - 2013 U6 - https://doi.org/10.1002/mrm.24453 SN - 1522-2594 VL - 70 IS - 1 SP - 290 EP - 294 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Orzada, S. A1 - Maderwald, S. A1 - Poser, B. A. A1 - Johst, S. A1 - Kannengiesser, S. A1 - Ladd, M. E. A1 - Bitz, Andreas T1 - Time-interleaved acquisition of modes: an analysis of SAR and image contrast implications JF - Magnetic Resonance in Medicine N2 - s the magnetic field strength and therefore the operational frequency in MRI are increased, the radiofrequency wavelength approaches the size of the human head/body, resulting in wave effects which cause signal decreases and dropouts. Especially, whole-body imaging at 7 T and higher is therefore challenging. Recently, an acquisition scheme called time-interleaved acquisition of modes has been proposed to tackle the inhomogeneity problems in high-field MRI. The basic premise is to excite two (or more) different Burn:x-wiley:07403194:media:MRM23081:tex2gif-stack-1 modes using static radiofrequency shimming in an interleaved acquisition, where the complementary radiofrequency patterns of the two modes can be exploited to improve overall signal homogeneity. In this work, the impact of time-interleaved acquisition of mode on image contrast as well as on time-averaged specific absorption rate is addressed in detail. Time-interleaved acquisition of mode is superior in Burn:x-wiley:07403194:media:MRM23081:tex2gif-stack-2 homogeneity compared with conventional radiofrequency shimming while being highly specific absorption rate efficient. Time-interleaved acquisition of modes can enable almost homogeneous high-field imaging throughout the entire field of view in PD, T2, and T2*-weighted imaging and, if a specified homogeneity criterion is met, in T1-weighted imaging as well. Y1 - 2012 U6 - https://doi.org/10.1002/mrm.23081 SN - 1522-2594 VL - 67 IS - 4 SP - 1033 EP - 1041 PB - Wiley-Liss CY - New York ER - TY - JOUR A1 - Kobus, Thiele A1 - Bitz, Andreas A1 - Uden, Mark J. van A1 - Lagemaat, Miram W. A1 - Rothgang, Eva A1 - Orzada, Stephan A1 - Heerschap, Arend A1 - Scheenen, Tom W. J. T1 - In vivo 31P MR spectroscopic imaging of the human prostate at 7 T: safety and feasibility JF - Magnetic Resonance in Medicine N2 - 31P MR spectroscopic imaging of the human prostate provides information about phosphorylated metabolites that could be used for prostate cancer characterization. The sensitivity of a magnetic field strength of 7 T might enable 3D 31P MR spectroscopic imaging with relevant spatial resolution in a clinically acceptable measurement time. To this end, a 31P endorectal coil was developed and combined with an eight-channel 1H body-array coil to relate metabolic information to anatomical location. An extensive safety validation was performed to evaluate the specific absorption rate, the radiofrequency field distribution, and the temperature distribution of both coils. This validation consisted of detailed Finite Integration Technique simulations, confirmed by MR thermometry and Burn:x-wiley:07403194:media:MRM24175:tex2gif-stack-1 measurements in a phantom and in vivo temperature measurements. The safety studies demonstrated that the presence of the 31P endorectal coil had no influence on the specific absorption rate levels and temperature distribution of the external eight-channel 1H array coil. To stay within a 10 g averaged local specific absorption rate of 10 W/kg, a maximum time-averaged input power of 33 W for the 1H array coil was allowed. For transmitting with the 31P endorectal coil, our safety limit of less than 1°C temperature increase in vivo during a 15-min MR spectroscopic imaging experiment was reached at a time-averaged input power of 1.9 W. With this power setting, a second in vivo measurement was performed on a healthy volunteer. Using adiabatic excitation, 3D 31P MR spectroscopic imaging produced spectra from the entire prostate in 18 min with a spatial resolution of 4 cm3. The spectral resolution enabled the separate detection of phosphocholine, phosphoethanolamine, inorganic phosphate, and other metabolites that could play an important role in the characterization of prostate cancer. Y1 - 2012 U6 - https://doi.org/10.1002/mrm.24175 SN - 1522-2594 VL - 68 IS - 6 SP - 1683 EP - 1695 PB - Wiley-Liss CY - New York ER - TY - JOUR A1 - Orzada, Stephan A1 - Maderwald, Stefan A1 - Poser, Benedikt Andreas A1 - Bitz, Andreas A1 - Quick, Harald H. A1 - Ladd, Mark E. T1 - RF excitation using time interleaved acquisition of modes (TIAMO) to address B1 inhomogeneity in high-field MRI JF - Magnetic Resonance in Medicine N2 - As the field strength and, therefore, the operational frequency in MRI is increased, the wavelength approaches the size of the human head/body, resulting in wave effects, which cause signal decreases and dropouts. Several multichannel approaches have been proposed to try to tackle these problems, including RF shimming, where each element in an array is driven by its own amplifier and modulated with a certain (constant) amplitude and phase relative to the other elements, and Transmit SENSE, where spatially tailored RF pulses are used. In this article, a relatively inexpensive and easy to use imaging scheme for 7 Tesla imaging is proposed to mitigate signal voids due to B1 field inhomogeneity. Two time-interleaved images are acquired using a different excitation mode for each. By forming virtual receive elements, both images are reconstructed together using GRAPPA to achieve a more homogeneous image, with only small SNR and SAR penalty in head and body imaging at 7 Tesla. Y1 - 2010 U6 - https://doi.org/10.1002/mrm.22527 SN - 1522-2594 VL - 64 IS - 2 SP - 327 EP - 333 PB - Wiley-Liss CY - New York ER - TY - JOUR A1 - Umutlu, Lale A1 - Bitz, Andreas A1 - Maderwald, Stefan A1 - Orzada, Stephan A1 - Kinner, Sonja A1 - Kraff, Oliver A1 - Brote, Irina A1 - Ladd, Susanne C. A1 - Schroeder, Tobias A1 - Forsting, Michael T1 - Contrast-enhanced ultra-high-field liver MRI: a feasibility trial JF - European Journal of Radiology Y1 - 2013 U6 - https://doi.org/10.1016/j.ejrad.2011.07.004 SN - 0720-048X VL - 82 IS - 5 SP - 760 EP - 767 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Yazdanbakhsh, Pedram A1 - Solbach, Klaus A1 - Bitz, Andreas T1 - Variable power combiner for RF mode shimming in 7-T MR imaging JF - IEEE Transaction on Biomedical Engineering N2 - This contribution discusses the utilization of RF power in an MRI system with RF mode shimming which enables the superposition of circularly polarized modes of a transmit RF coil array driven by a Butler matrix. Since the required power for the individual modes can vary widely, mode-shimming can result in a significant underutilization of the total available RF power. A variable power combiner (VPC) is proposed to improve the power utilization: it can be realized as a reconfiguration of the MRI transmit system by the inclusion of one additional matrix network which receives the power from all transmit amplifiers at its input ports and provides any desired (combined) power distribution at its output ports by controlling the phase and amplitude of the amplifiers’ input signals. The power distribution at the output ports of the VPC is then fed into the “mode” ports of the coil array Butler matrix in order to superimpose the spatial modes at the highest achievable power utilization. The VPC configuration is compared to the standard configuration of the transmit chain of our MRI system with 8 transmit channels and 16 coils. In realistic scenarios, improved power utilization was achieved from 17% to 60% and from 14% to 55% for an elliptical phantom and a region of interest in the abdomen, respectively, and an increase of the power utilization of 1 dB for a region of interest in the upper leg. In general, it is found that the VPC allows significant improvement in power utilization when the shimming solution demands only a few modes to be energized, while the technique can yield loss in power utilization in cases with many modes required at high power level. Y1 - 2012 U6 - https://doi.org/10.1109/TBME.2012.2205926 SN - 1558-2531 VL - 59 IS - 9 SP - 2549 EP - 2557 PB - IEEE CY - New York ER - TY - JOUR A1 - Prochnow, Nora A1 - Gebing, Tina A1 - Ladage, Kerstin A1 - Krause-Finkeldey, Dorothee A1 - Ourdi, Abessamad El A1 - Bitz, Andreas A1 - Streckert, Joachim A1 - Hansen, Volkert A1 - Dermietzel, Rolf T1 - Electromagnetic field effect or simply stress? Effects of UMTS exposure on hippocampal longterm plasticity in the context of procedure related hormone release JF - PLoS one N2 - Harmful effects of electromagnetic fields (EMF) on cognitive and behavioural features of humans and rodents have been controversially discussed and raised persistent concern about adverse effects of EMF on general brain functions. In the present study we applied radio-frequency (RF) signals of the Universal Mobile Telecommunications System (UMTS) to full brain exposed male Wistar rats in order to elaborate putative influences on stress hormone release (corticosteron; CORT and adrenocorticotropic hormone; ACTH) and on hippocampal derived synaptic long-term plasticity (LTP) and depression (LTD) as electrophysiological hallmarks for memory storage and memory consolidation. Exposure was computer controlled providing blind conditions. Nominal brain-averaged specific absorption rates (SAR) as a measure of applied mass-related dissipated RF power were 0, 2, and 10 W/kg over a period of 120 min. Comparison of cage exposed animals revealed, regardless of EMF exposure, significantly increased CORT and ACTH levels which corresponded with generally decreased field potential slopes and amplitudes in hippocampal LTP and LTD. Animals following SAR exposure of 2 W/kg (averaged over the whole brain of 2.3 g tissue mass) did not differ from the sham-exposed group in LTP and LTD experiments. In contrast, a significant reduction in LTP and LTD was observed at the high power rate of SAR (10 W/kg). The results demonstrate that a rate of 2 W/kg displays no adverse impact on LTP and LTD, while 10 W/kg leads to significant effects on the electrophysiological parameters, which can be clearly distinguished from the stress derived background. Our findings suggest that UMTS exposure with SAR in the range of 2 W/kg is not harmful to critical markers for memory storage and memory consolidation, however, an influence of UMTS at high energy absorption rates (10 W/kg) cannot be excluded. Y1 - 2011 U6 - https://doi.org/10.1371/journal.pone.0019437 VL - 6 IS - 5 PB - PLOS CY - San Francisco ER - TY - JOUR A1 - Orzada, Stephan A1 - Bitz, Andreas A1 - Schäfer, Lena C. A1 - Ladd, Susanne C. A1 - Ladd, Mark E. A1 - Maderwald, Stefan T1 - Open design eight-channel transmit/receive coil for high-resolution and real-time ankle imaging at 7 T JF - Medical Physics N2 - Purpose: At 1.5 T, real-time MRI of joint movement has been shown to be feasible. However, 7 T, provides higher SNR and thus an improved potential for parallel imaging acceleration. The purpose of this work was to build an open, U-shaped eight-channel transmit/receive microstrip coil for 7 T MRI to enable high-resolution and real-time imaging of the moving ankle joint. Methods: A U-shaped eight-channel transmit/receive array for the human ankle was built.urn:x-wiley:00942405:mp3399:equation:mp3399-math-0001-parameters and urn:x-wiley:00942405:mp3399:equation:mp3399-math-0002-factor were measured. SAR calculations of different ankle postures were performed to ensure patient safety. Inhomogeneities in the transmit field consequent to the open design were compensated for by the use of static RF shimming. High-resolution and real-time imaging was performed in human volunteers. Results: The presented array showed good performance with regard to patient comfort and image quality. High acceleration factors of up to 4 are feasible without visible acceleration artifacts. Reasonable image homogeneity was achieved with RF shimming. Conclusions: Open, noncylindrical designs for transmit/receive coils are practical at 7 T and real-time imaging of the moving joint is feasible with the presented coil design. Y1 - 2011 U6 - https://doi.org/10.1118/1.3553399 SN - 2473-4209 VL - 38 IS - 3 SP - 1162 EP - 1167 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Dammann, Philipp A1 - Ladd, Susanne C. A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - An eight-channel transmit/receive multipurpose coil for musculoskeletal MR imaging at 7 T JF - Medical Physics N2 - Purpose: MRI plays a leading diagnostic role in assessing the musculoskeletal (MSK) system and is well established for most questions at clinically used field strengths (up to 3 T). However, there are still limitations in imaging early stages of cartilage degeneration, very fine tendons and ligaments, or in locating nerve lesions, for example. 7 T MRI of the knee has already received increasing attention in the current published literature, but there is a strong need to develop new radiofrequency (RF) coils to assess more regions of the MSK system. In this work, an eight-channel transmit/receive RF array was built as a multipurpose coil for imaging some of the thus far neglected regions. An extensive coil characterization protocol and first in vivo results of the human wrist, shoulder, elbow, knee, and ankle imaged at 7 T will be presented. Methods: Eight surface loop coils with a dimension ofurn:x-wiley:00942405:media:mp7176:mp7176-math-0001 were machined from FR4 circuit board material. To facilitate easy positioning, two coil clusters, each with four loop elements, were combined to one RF transmit/receive array. An overlapped and shifted arrangement of the coil elements was chosen to reduce the mutual inductance between neighboring coils. A phantom made of body-simulating liquid was used for tuning and matching on the bench. Afterward, the S-parameters were verified on a human wrist, elbow, and shoulder. For safety validation, a detailed compliance test was performed including full wave simulations of the RF field distribution and the corresponding specific absorption rate (SAR) for all joints. In vivo images of four volunteers were assessed with gradient echo and spin echo sequences modified to obtain optimal image contrast, full anatomic coverage, and the highest spatial resolution within a reasonable acquisition time. The performance of the RF coil was additionally evaluated by in vivo B1 mapping. Results: A comparison of B1 per unit power, flip angle distribution, and anatomic images showed a fairly homogeneous excitation for the smaller joints (elbow, wrist, and ankle), while for the larger joints, the shoulder and especially the knee, B1 inhomogeneities and limited penetration depth were more pronounced. However, the greater part of the shoulder joint could be imaged.In vivo images rendered very fine anatomic details such as fascicles of the median nerve and the branching of the nerve bundles. High-resolution images of cartilage, labrum, and tendons could be acquired. Additionally, turbo spin echo (TSE) and inversion recovery sequences performed very well. Conclusions: This study demonstrates that the concept of two four-channel transmit/receive RF arrays can be used as a multipurpose coil for high-resolutionin vivo MR imaging of the musculoskeletal system at 7 T. Not only gradient echo but also typical clinical and SAR-intensive sequences such as STIR and TSE performed well. Imaging of small structures and peripheral nerves could in particular benefit from this technique. Y1 - 2010 U6 - https://doi.org/10.1118/1.3517176 SN - 2473-4209 VL - 37 IS - 12 SP - 6368 EP - 6376 PB - Wiley CY - Hoboken, NJ ER - TY - JOUR A1 - Orzada, Stephan A1 - Ladd, Mark E. A1 - Bitz, Andreas T1 - A method to approximate maximum local SAR in multichannel transmit MR systems without transmit phase information JF - Magnetic Resonance in Medicine N2 - Purpose To calculate local specific absorption rate (SAR) correctly, both the amplitude and phase of the signal in each transmit channel have to be known. In this work, we propose a method to derive a conservative upper bound for the local SAR, with a reasonable safety margin without knowledge of the transmit phases of the channels. Methods The proposed method uses virtual observation points (VOPs). Correction factors are calculated for each set of VOPs that prevent underestimation of local SAR when the VOPs are applied with the correct amplitudes but fixed phases. Results The proposed method proved to be superior to the worst-case calculation based on the maximum eigenvalue of the VOPs. The mean overestimation for six coil setups could be reduced, whereas no underestimation of the maximum local SAR occurred. In the best investigated case, the overestimation could be reduced from a factor of 3.3 to a factor of 1.7. Conclusion The upper bound for the local SAR calculated with the proposed method allows a fast estimation of the local SAR based on power measurements in the transmit channels and facilitates SAR monitoring in systems that do not have the capability to monitor transmit phases Y1 - 2016 U6 - https://doi.org/10.1002/mrm.26398 SN - 1522-2594 VL - 78 IS - 2 SP - 805 EP - 811 PB - International Society for Magnetic Resonance in Medicine ER - TY - JOUR A1 - Chen, Bixia A1 - Schoemberg, Tobias A1 - Kraff, Oliver A1 - Dammann, Philipp A1 - Bitz, Andreas A1 - Schlamann, Marc A1 - Quick, Harald H. A1 - Ladd, Mark E. A1 - Sure, Ulrich A1 - Wrede, Karsten H. T1 - Cranial fixation plates in cerebral magnetic resonance imaging: a 3 and 7 Tesla in vivo image quality study JF - Magnetic Resonance Materials in Physics, Biology and Medicine N2 - Objective This study assesses and quantifies impairment of postoperative magnetic resonance imaging (MRI) at 7 Tesla (T) after implantation of titanium cranial fixation plates (CFPs) for neurosurgical bone flap fixation. Materials and methods The study group comprised five patients who were intra-individually examined with 3 and 7 T MRI preoperatively and postoperatively (within 72 h/3 months) after implantation of CFPs. Acquired sequences included T₁-weighted magnetization-prepared rapid-acquisition gradient-echo (MPRAGE), T₂-weighted turbo-spin-echo (TSE) imaging, and susceptibility-weighted imaging (SWI). Two experienced neurosurgeons and a neuroradiologist rated image quality and the presence of artifacts in consensus reading. Results Minor artifacts occurred around the CFPs in MPRAGE and T2 TSE at both field strengths, with no significant differences between 3 and 7 T. In SWI, artifacts were accentuated in the early postoperative scans at both field strengths due to intracranial air and hemorrhagic remnants. After resorption, the brain tissue directly adjacent to skull bone could still be assessed. Image quality after 3 months was equal to the preoperative examinations at 3 and 7 T. Conclusion Image quality after CFP implantation was not significantly impaired in 7 T MRI, and artifacts were comparable to those in 3 T MRI. Y1 - 2016 U6 - https://doi.org/10.1007/s10334-016-0548-1 SN - 1352-8661 VL - 29 IS - 3 SP - 389 EP - 398 PB - Springer CY - Berlin ER - TY - JOUR A1 - Schmidt, K. A1 - Forkmann, K. A1 - Sinke, C. A1 - Gratz, M. A1 - Bitz, Andreas A1 - Bingel, U. T1 - The differential effect of trigeminal vs. peripheral pain stimulation on visual processing and memory encoding is influenced by pain-related fear JF - NeuroImage N2 - Compared to peripheral pain, trigeminal pain elicits higher levels of fear, which is assumed to enhance the interruptive effects of pain on concomitant cognitive processes. In this fMRI study we examined the behavioral and neural effects of trigeminal (forehead) and peripheral (hand) pain on visual processing and memory encoding. Cerebral activity was measured in 23 healthy subjects performing a visual categorization task that was immediately followed by a surprise recognition task. During the categorization task subjects received concomitant noxious electrical stimulation on the forehead or hand. Our data show that fear ratings were significantly higher for trigeminal pain. Categorization and recognition performance did not differ between pictures that were presented with trigeminal and peripheral pain. However, object categorization in the presence of trigeminal pain was associated with stronger activity in task-relevant visual areas (lateral occipital complex, LOC), memory encoding areas (hippocampus and parahippocampus) and areas implicated in emotional processing (amygdala) compared to peripheral pain. Further, individual differences in neural activation between the trigeminal and the peripheral condition were positively related to differences in fear ratings between both conditions. Functional connectivity between amygdala and LOC was increased during trigeminal compared to peripheral painful stimulation. Fear-driven compensatory resource activation seems to be enhanced for trigeminal stimuli, presumably due to their exceptional biological relevance. Y1 - 2016 U6 - https://doi.org/10.1016/j.neuroimage.2016.03.026 SN - 1053-8119 VL - 134 SP - 386 EP - 395 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Bank, Bart L. van de A1 - Orzada, Stephan A1 - Smits, Frits A1 - Lagemaat, Miriam W. A1 - Rodgers, Christopher T. A1 - Bitz, Andreas A1 - Scheenen, Tom W. J. T1 - Optimized (31) P MRS in the human brain at 7 T with a dedicated RF coil setup JF - NMR in Biomedicine Y1 - 2015 U6 - https://doi.org/10.1002/nbm.3422 SN - 1099-1492 VL - 28 IS - 11 SP - 1570 EP - 1578 PB - Wiley CY - Weinheim ER - TY - RPRT A1 - Sansom, M. A1 - Lawson, R.M. A1 - Tucho, R. A1 - Kendrick, C. A1 - Ogden, R. A1 - Resalati, S. A1 - Garay, R. A1 - Döring, Bernd A1 - Reger, V. A1 - Gilbert, J. A1 - Heikkinen, J. A1 - Hemmila, K. T1 - Building in active thermal mass into steel structures (BATIMASS) - EUR 28166EN N2 - The main objective of the BATIMASS project was to address how the energy balance in relatively lightweight steel buildings can be improved by building in ‘active thermal mass’ (ATM) into the building fabric. This was achieved through concept design, dynamic thermal modelling and testing of a number of potentially viable systems and concepts. A significant programme of thermal simulation modelling was undertaken utilising the thermally equivalent slab (TES) concept to model the passive thermal capacity effect of profiled, composite metal floor decks. It is apparent from the modelling results that thermal mass is a highly complex phenomenon which is highly dependent upon building type, occupancy patterns, climate and many other aspects of the building design and servicing strategy. The ATM systems developed, both conceptually and for prototype testing, focussed on water-cooled composite slabs, the Cofradal floor system and the phase change material (PCM) Energain. In addition to laboratory testing of prototypes, whole building monitoring was undertaken at the Kubik building in Spain and the RWTH test building in Germany. Advanced thermal modelling was also undertaken to estimate the likely benefits of the ATM concept designs developed and for comparison with the test results. In addition to thermal testing, structural tests were conducted on composite floor specimens incorporating embedded water pipes. This Final Report presents the results of the activities carried out under this RFCS contract RFSR CT 2012 00033. The work carried out is reported in six major sections corresponding to the technical Work Packages of the project. Only summaries of the work carried out are provided in this report; all work undertaken is fully reported in the formal project deliverables. KW - industrial research KW - iron and steel industry KW - research project KW - materials technology KW - resistance of materials KW - steel KW - metal structure KW - ingot KW - building industry KW - research report Y1 - 2016 SN - 978-92-79-63176-4 U6 - https://doi.org/10.2777/25999 SN - 1831-9424 PB - Publications Office of the European Union CY - Luxembourg ER - TY - JOUR A1 - Noureddine, Yacine A1 - Bitz, Andreas A1 - Ladd, Mark E. A1 - Thürling, Markus A1 - Ladd, Susanne C. A1 - Schaefers, Gregor A1 - Kraff, Oliver T1 - Experience with magnetic resonance imaging of human subjects with passive implants and tattoos at 7 T: a retrospective study JF - Magnetic Resonance Materials in Physics, Biology and Medicine Y1 - 2015 U6 - https://doi.org/10.1007/s10334-015-0499-y SN - 1352-8661 VL - 28 IS - 6 SP - 577 EP - 590 PB - Springer CY - Berlin ER - TY - JOUR A1 - Lagemaat, Miriam W. A1 - Breukels, Vincent A1 - Vos, Eline K. A1 - B., Adam A1 - Uden, Mark J. van A1 - Orzada, Stephan A1 - Bitz, Andreas A1 - Maas, Marnix C. A1 - Scheenen, Tom W. J. T1 - ¹H MR spectroscopic imaging of the prostate at 7T using spectral-spatial pulses JF - Magnetic Resonance in Medicine N2 - Purpose To assess the feasibility of prostate ¹H MR spectroscopic imaging (MRSI) using low-power spectral-spatial (SPSP) pulses at 7T, exploiting accurate spectral selection and spatial selectivity simultaneously. Methods A double spin-echo sequence was equipped with SPSP refocusing pulses with a spectral selectivity of 1 ppm. Three-dimensional prostate ¹H-MRSI at 7T was performed with the SPSP-MRSI sequence using an 8-channel transmit array coil and an endorectal receive coil in three patients with prostate cancer and in one healthy subject. No additional water or lipid suppression pulses were used. Results Prostate ¹H-MRSI could be obtained well within specific absorption rate (SAR) limits in a clinically feasible time (10 min). Next to the common citrate signals, the prostate spectra exhibited high spermine signals concealing creatine and sometimes also choline. Residual lipid signals were observed at the edges of the prostate because of limitations in spectral and spatial selectivity. Conclusion It is possible to perform prostate ¹H-MRSI at 7T with a SPSP-MRSI sequence while using separate transmit and receive coils. This low-SAR MRSI concept provides the opportunity to increase spatial resolution of MRSI within reasonable scan times. Y1 - 2016 U6 - https://doi.org/10.1002/mrm.25569 SN - 1522-2594 VL - 75 IS - 3 SP - 933 EP - 945 PB - International Society for Magnetic Resonance in Medicine ER - TY - JOUR A1 - Vos, E. K. A1 - Lagemaat, M. W. A1 - Barentsz, J. O. A1 - Fütterer, J. J. A1 - Zamecnik, P. A1 - Roozen, H. A1 - Orzada, S. A1 - Bitz, Andreas A1 - Maas, M. C. A1 - Scheenen, T. W. J. T1 - Image quality and cancer visibility of T2-weighted Magnetic Resonance Imaging of the prostate at 7 Tesla JF - European Radiology N2 - Objectives To assess the image quality of T2-weighted (T2w) magnetic resonance imaging of the prostate and the visibility of prostate cancer at 7 Tesla (T). Materials & methods Seventeen prostate cancer patients underwent T2w imaging at 7T with only an external transmit/receive array coil. Three radiologists independently scored images for image quality, visibility of anatomical structures, and presence of artefacts. Krippendorff’s alpha and weighted kappa statistics were used to assess inter-observer agreement. Visibility of prostate cancer lesions was assessed by directly linking the T2w images to the confirmed location of prostate cancer on histopathology. Results T2w imaging at 7T was achievable with ‘satisfactory’ (3/5) to ‘good’ (4/5) quality. Visibility of anatomical structures was predominantly scored as ‘satisfactory’ (3/5) and ‘good’ (4/5). If artefacts were present, they were mostly motion artefacts and, to a lesser extent, aliasing artefacts and noise. Krippendorff’s analysis revealed an α = 0.44 between three readers for the overall image quality scores. Clinically significant cancer lesions in both peripheral zone and transition zone were visible at 7T. Conclusion T2w imaging with satisfactory to good quality can be routinely acquired, and cancer lesions were visible in patients with prostate cancer at 7T using only an external transmit/receive body array coil. Y1 - 2014 U6 - https://doi.org/10.1007/s00330-014-3234-6 SN - 1432-1084 VL - 24 IS - 8 SP - 1950 EP - 1958 PB - Springer CY - Cham ER - TY - JOUR A1 - Lagemaat, Miriam W. A1 - Maas, Marnix C. A1 - Vos, Eline K. A1 - Bitz, Andreas A1 - Orzada, Stephan A1 - Weiland, Elisabeth A1 - Uden, Mark J. van A1 - Kobus, Thiele A1 - Heerschap, Arend A1 - Scheenen, Tom W. J. T1 - (31) P MR spectroscopic imaging of the human prostate at 7 T: T1 relaxation times, Nuclear Overhauser Effect, and spectral characterization JF - Magnetic Resonance in Medicine Y1 - 2015 U6 - https://doi.org/10.1002/mrm.25209 SN - 1522-2594 VL - 73 IS - 3 SP - 909 EP - 920 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Theysohn, Jens M. A1 - Kraff, Oliver A1 - Eilers, Kristina A1 - Andrade, Dorian A1 - Gerwig, Marcus A1 - Timmann, Dagmar A1 - Schmitt, Franz A1 - Ladd, Mark E. A1 - Ladd, Susanne C. A1 - Bitz, Andreas T1 - Vestibular effects of a 7 Tesla MRI examination compared to 1.5 T and 0 T in healthy volunteers JF - PLoS one N2 - Ultra-high-field MRI (7 Tesla (T) and above) elicits more temporary side-effects compared to 1.5 T and 3 T, e.g. dizziness or “postural instability” even after exiting the scanner. The current study aims to assess quantitatively vestibular performance before and after exposure to different MRI scenarios at 7 T, 1.5 T and 0 T. Sway path and body axis rotation (Unterberger's stepping test) were quantitatively recorded in a total of 46 volunteers before, 2 minutes after, and 15 minutes after different exposure scenarios: 7 T head MRI (n = 27), 7 T no RF (n = 22), 7 T only B₀ (n = 20), 7 T in & out B₀ (n = 20), 1.5 T no RF (n = 20), 0 T (n = 15). All exposure scenarios lasted 30 minutes except for brief one minute exposure in 7 T in & out B₀. Both measures were documented utilizing a 3D ultrasound system. During sway path evaluation, the experiment was repeated with eyes both open and closed. Sway paths for all long-lasting 7 T scenarios (normal, no RF, only B₀) with eyes closed were significantly prolonged 2 minutes after exiting the scanner, normalizing after 15 minutes. Brief exposure to 7 T B₀ or 30 minutes exposure to 1.5 T or 0 T did not show significant changes. End positions after Unterberger's stepping test were significantly changed counter-clockwise after all 7 T scenarios, including the brief in & out B₀ exposure. Shorter exposure resulted in a smaller alteration angle. In contrast to sway path, reversal of changes in body axis rotation was incomplete after 15 minutes. 1.5 T caused no rotational changes. The results show that exposure to the 7 Tesla static magnetic field causes only a temporary dysfunction or “over-compensation” of the vestibular system not measurable at 1.5 or 0 Tesla. Radiofrequency fields, gradient switching, and orthostatic dysregulation do not seem to play a role. Y1 - 2014 U6 - https://doi.org/10.1371/journal.pone.0092104 SN - 1932-6203 VL - 9 IS - 3 PB - PLOS CY - San Francisco ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Breyer, Tobias A1 - Kruszona, Stefan A1 - Maderwald, Stefan A1 - Brote, Irina A1 - Gizewski, Elke R. A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - A transmit/receive radiofrequency array for imaging the carotid arteries at 7 Tesla: coil design and first in vivo results JF - Investigative Radiology N2 - Objective: To develop a transmit/receive radiofrequency (RF) array for magnetic resonance imaging (MRI) of the carotid arteries at 7 T. The prototype is characterized in numerical simulations and bench measurements, and the feasibility of plaque imaging at 7 T is demonstrated in first in vivo images. Materials and Methods: The RF phased array coil consists of 8 surface loop coils. To allow imaging of both sides of the neck, the RF array is divided into 2 coil clusters, each with 4 overlapping loop elements. For safety validation, numerical computations of the RF field distribution and the corresponding specific absorption rate were performed on the basis of a heterogeneous human body model. To validate the coil model, maps of the transmit B1+ field were compared between simulation and measurement. In vivo images of a healthy volunteer and a patient (ulcerating plaque and a 50% stenosis of the right internal carotid artery) were acquired using a 3-dimensional FLASH sequence with a high isotropic spatial resolution of 0.54 mm as well as using pulse-triggered proton density (PD)/T2-weighted turbo spin echo sequences. Results: Measurements of the S-parameters yielded a reflection and isolation of the coil elements of better than −18 and −13 dB, respectively. Measurements of the g-factor indicated good image quality for parallel imaging acceleration factors up to 2.4. A similar distribution and a very good match of the absolute values were found between the measured and simulated B1+ transmit RF field for the validation of the coil model. In vivo images revealed good signal excitation of both sides of the neck and a high vessel-to-background image contrast for the noncontrast-enhanced 3-dimensional FLASH sequence. Imaging at 7 T could depict the extent of stenosis, and revealed the disruption and ulcer of the plaque. Conclusions: This study demonstrates that 2 four-channel transmit/receive RF arrays for each side of the neck is a suitable concept for in vivo MRI of the carotid arteries at 7 Tesla. Further studies are needed to explore and exploit the full potential of 7 T high-field MRI for carotid atherosclerotic plaque imaging. Y1 - 2011 U6 - https://doi.org/10.1097/RLI.0b013e318206cee4 SN - 1536-0210 VL - 46 IS - 4 SP - 246 EP - 254 PB - Wolters Kluwer CY - Köln ER - TY - JOUR A1 - El Quardi, A. A1 - Streckert, J. A1 - Bitz, Andreas A1 - Münkner, S. A1 - Engel, J. A1 - Hansen, V. T1 - New fin-line devices for radiofrequency exposure of small biological samples in vitro allowing whole-cell patch clamp recordings JF - Bioelectromagnetics N2 - The development and analysis of three waveguides for the exposure of small biological in vitro samples to mobile communication signals at 900 MHz (GSM, Global System for Mobile Communications), 1.8 GHz (GSM), and 2 GHz (UMTS, Universal Mobile Telecommunications System) is presented. The waveguides were based on a fin-line concept and the chamber containing the samples bathed in extracellular solution was placed onto two fins with a slot in between, where the exposure field concentrates. Measures were taken to allow for patch clamp recordings during radiofrequency (RF) exposure. The necessary power for the achievement of the maximum desired specific absorption rate (SAR) of 20 W/kg (average over the mass of the solution) was approximately Pin = 50 mW, Pin = 19 mW, and Pin = 18 mW for the 900 MHz, 1800 MHz, and 2 GHz devices, respectively. At 20 W/kg, a slight RF-induced temperature elevation in the solution of no more than 0.3 °C was detected, while no thermal offsets due to the electromagnetic exposure could be detected at the lower SAR settings (2, 0.2, and 0.02 W/kg). A deviation of 10% from the intended solution volume yielded a calculated SAR deviation of 8% from the desired value. A maximum ±10% variation in the local SAR could occur when the position of the patch clamp electrode was altered within the area where the cells to be investigated were located. Y1 - 2011 U6 - https://doi.org/10.1002/bem.20621 SN - 1521-186X VL - 32 IS - 2 SP - 102 EP - 112 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Schlamann, Marc A1 - Voigt, Melanie A. A1 - Maderwald, Stefan A1 - Bitz, Andreas A1 - Kraff, Oliver A1 - Ladd, Susanne C. A1 - Ladd, Mark E. A1 - Forsting, Michael A1 - Wilhelm, Hans T1 - Exposure to high-field MRI does not affect cognitive function JF - Journal of Magnetic Resonance Imaging N2 - Purpose To assess potential cognitive deficits under the influence of static magnetic fields at various field strengths some studies already exist. These studies were not focused on attention as the most vulnerable cognitive function. Additionally, mostly no magnetic resonance imaging (MRI) sequences were performed. Materials and Methods In all, 25 right-handed men were enrolled in this study. All subjects underwent one MRI examination of 63 minutes at 1.5 T and one at 7 T within an interval of 10 to 30 days. The order of the examinations was randomized. Subjects were referred to six standardized neuropsychological tests strictly focused on attention immediately before and after each MRI examination. Differences in neuropsychological variables between the timepoints before and after each MRI examination were assessed and P-values were calculated Results Only six subtests revealed significant differences between pre- and post-MRI. In these tests the subjects achieved better results in post-MRI testing than in pre-MRI testing (P = 0.013–0.032). The other tests revealed no significant results. Conclusion The improvement in post-MRI testing is only explicable as a result of learning effects. MRI examinations, even in ultrahigh-field scanners, do not seem to have any persisting influence on the attention networks of human cognition immediately after exposure. Y1 - 2010 U6 - https://doi.org/10.1002/jmri.22065 SN - 1522-2586 VL - 31 IS - 5 SP - 1061 EP - 1066 PB - Wiley-Liss CY - New York ER - TY - JOUR A1 - Bitz, Andreas A1 - Zhou, Yi A1 - El Quardi, Abdessamad A1 - Streckert, Joachim T1 - Occupational Exposure at Mobile Communication Base Station Antenna Sites JF - Frequenz Y1 - 2009 U6 - https://doi.org/10.1515/FREQ.2009.63.7-8.123 SN - 2191-6349 VL - 63 IS - 7-8 SP - 123 EP - 128 ER - TY - JOUR A1 - Schlamann, Marc A1 - Yoon, Min-Suk A1 - Maderwald, Stefan A1 - Pietrzyk, Thomas A1 - Bitz, Andreas A1 - Gerwig, Marcus A1 - Forsting, Michael A1 - Ladd, Susanne C. A1 - Ladd, Mark E. A1 - Kastrup, Oliver T1 - Short term effects of magnetic resonance imaging on excitability of the motor cortex at 1.5T and 7T JF - Academic Radiology N2 - Rationale and Objectives The increasing spread of high-field and ultra-high-field magnetic resonance imaging (MRI) scanners has encouraged new discussion of the safety aspects of MRI. Few studies have been published on possible cognitive effects of MRI examinations. The aim of this study was to examine whether changes are measurable after MRI examinations at 1.5 and 7 T by means of transcranial magnetic stimulation (TMS). Materials and Methods TMS was performed in 12 healthy, right-handed male volunteers. First the individual motor threshold was specified, and then the cortical silent period (SP) was measured. Subsequently, the volunteers were exposed to the 1.5-T MRI scanner for 63 minutes using standard sequences. The MRI examination was immediately followed by another TMS session. Fifteen minutes later, TMS was repeated. Four weeks later, the complete setting was repeated using a 7-T scanner. Control conditions included lying in the 1.5-T scanner for 63 minutes without scanning and lying in a separate room for 63 minutes. TMS was performed in the same way in each case. For statistical analysis, Wilcoxon's rank test was performed. Results Immediately after MRI exposure, the SP was highly significantly prolonged in all 12 subjects at 1.5 and 7 T. The motor threshold was significantly increased. Fifteen minutes after the examination, the measured value tended toward normal again. Control conditions revealed no significant differences. Conclusion MRI examinations lead to a transient and highly significant alteration in cortical excitability. This effect does not seem to depend on the strength of the static magnetic field. Y1 - 2010 U6 - https://doi.org/10.1016/j.acra.2009.10.004 SN - 1076-6332 VL - 17 IS - 3 SP - 277 EP - 281 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Kruszona, Stefan A1 - Orzada, Stephan A1 - Schaefer, Lena C. A1 - Theysohn, Jens M. A1 - Maderwald, Stefan A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - An eight-channel phased array RF coil for spine MR imaging at 7 T JF - Investigative Radiology Y1 - 2009 U6 - https://doi.org/10.1097/RLI.0b013e3181b24ab7 SN - 1536-0210 VL - 44 IS - 11 SP - 734 EP - 740 PB - Lippincott Williams & Wilkins ER - TY - JOUR A1 - Schlamann, M. A1 - Yoon, M.-S. A1 - Maderwald, S. A1 - Pietrzyk, T. A1 - Bitz, Andreas A1 - Gerwig, M. A1 - Forsting, M. A1 - Ladd, S. C. A1 - Ladd, M. E. A1 - Kastrup, O. T1 - Auswirkungen der Magnetresonanztomografie auf die Elektrophysiologie des motorischen Kortex: eine Studie mit transkranieller Magnetstimulation T1 - Effects of MRI on the electrophysiology of the motor cortex: a TMS study JF - RöFo - Fortschritte auf dem Giebiet der Röntgenstrahlen und der bildgebenden Verfahren Y1 - 2009 U6 - https://doi.org/10.1055/s-0028-1109038 SN - 1438-9029 VL - 181 IS - 3 SP - 215 EP - 219 PB - Thieme CY - Stuttgart ER - TY - JOUR A1 - Klomp, D. W. J. A1 - Bitz, Andreas A1 - Heerschap, A. A1 - Scheenen, T. W. J. T1 - Proton spectroscopic imaging of the human prostate at 7 T JF - NMR in Biomedicine Y1 - 2009 U6 - https://doi.org/10.1002/nbm.1360 SN - 1099-1492 VL - 22 IS - 5 SP - 495 EP - 501 ER - TY - JOUR A1 - Lerchl, Alexander A1 - Krüger, Heike A1 - Niehaus, Michael A1 - Streckert, Joachim R. A1 - Bitz, Andreas A1 - Hansen, Volkert T1 - Effects of mobile phone electromagnetic fields at nonthermal SAR values on melatonin and body weight of Djungarian hamsters (Phodopus sungorus) JF - Journal of Pineal Research Y1 - 2008 U6 - https://doi.org/10.1111/j.1600-079X.2007.00522.x SN - 1600-079X VL - 44 IS - 3 SP - 267 EP - 272 ER - TY - JOUR A1 - Lanzl, I. A1 - Kotliar, Konstantin T1 - Können Anti-VEGF-Injektionen Glaukom oder okuläre Hypertension verursachen? T1 - Can Anti-VEGF Injections Cause Glaucoma or Ocular Hypertension? JF - Klinische Monatsblätter für Augenheilkunde Y1 - 2017 U6 - https://doi.org/10.1055/s-0043-101819 SN - 0023-2165 VL - 234 IS - 2 SP - 191 EP - 193 PB - Thieme CY - Stuttgart ER - TY - JOUR A1 - Lind, Thorsten Patric T1 - Rückzahlung von gewinnunabhängigen Ausschüttungen bei Auflösung einer stillen Gesellschaft : BGH, Versäumnisurteil vom 20.09.2016 - II ZR 120/15 (LG Berlin) : Anmerkung JF - Fachdienst Zivilrecht - LMK : kommentierte BGH-Rechtsprechung ; in Zsarb. mit der Neuen Juristischen Wochenschrift / Lindermaier-Möhring N2 - Zum Zweck der Kapitalanlage beteiligte sich der Bekl. an einer Publikumsgesellschaft. Diese war als (mehrgliedrige) atypische stille Gesellschaft organisiert (vgl. a. BGHZ 199, 104 = DNotZ 2014, 374 = NZG 2013, 1422 = DStR 2014, 45 Rn. 18). Der Gesellschaftsvertrag („GV“) sah für diejenigen Gesellschafter, die wie der Bekl. ihre Einlage in Form einer Einmaleinlage erbracht hatten, eine jährliche gewinnunabhängige Ausschüttung vor. Es sollte sich dabei ausdrücklich nicht um eine Garantieverzinsung handeln. Ende 2009 wurde die stille Gesellschaft durch Mehrheitsbeschluss der Stillen aufgelöst. Nach dem GV waren die Stillen im Falle ihres Ausscheidens sowie bei „Liquidation des Unternehmens“ des Geschäftsinhabers verhältnismäßig an dem jeweils seit ihrem Beitritt gebildeten Vermögen einschließlich der stillen Reserven sowie eines evtl. Geschäftswerts zu beteiligen (Auseinandersetzungswert). Den sich hiernach für den Bekl. auf seinem Kapitalkonto ergebenden Negativsaldo sollte dieser durch Erstattung der von ihm erhaltenen gewinnunabhängigen Auszahlungen ausgleichen. Anders als das LG als Berufungsinstanz bejahte der BGH auf Grundlage des GV einen Rückerstattungsanspruch der klagenden Geschäftsinhaberin. Y1 - 2016 PB - Beck CY - München ER - TY - RPRT A1 - Lawson, R.M. A1 - Baddoo, N.R. A1 - Vanier, G. A1 - Döring, Bernd A1 - Kuhnhenne, M. A1 - Nieminen, J. A1 - Beguin, P. A1 - Herbin, S. A1 - Caroli, G. A1 - Adetunji, I. A1 - Kozlowski, A. T1 - Renovation of buildings using steel technologies (Robust) - EUR 25335 N2 - Robust addresses the renovation and improvement of existing residential, industrial and commercial buildings using steel-based technologies, focusing on techniques such as over-cladding, over-roofing and roof-top extensions. Steel-intensive renovation techniques currently on the market were reviewed. Performance criteria were developed for over-cladding systems meeting current regulatory standards, with guidelines on how to achieve appropriate levels of air-tightness. KW - iron and steel industry KW - steel KW - materials technology KW - building materials KW - metal structure KW - building safety KW - testing KW - industrial research Y1 - 2013 SN - 978-92-79-24950-1 U6 - https://doi.org/10.2777/97860 SN - 1831-9424 PB - Publications Office of the European Union CY - Luxembourg ER - TY - RPRT A1 - Feldmann, M. A1 - Kuhnhenne, M. A1 - Döring, Bernd A1 - Pyschny, D. A1 - Lawson, R.M. A1 - Chuter, R.D. A1 - Boudjabeur, S. A1 - Lecomte-Labory, F. A1 - Airaksinen, M. A1 - Heikkinen, J. A1 - Laamanen, J. A1 - Albart, P. A1 - D'Haeyer, R. A1 - Chica, J.A. A1 - Maseda, J.M. A1 - Amundarain, A. A1 - Rips, M.O. A1 - Nuñez, J.A. A1 - Macías, O. A1 - Beguin, P. A1 - Ben Larbi, A. T1 - Energy and thermal improvements for construction in steel (ETHICS) - EUR 26010 N2 - ETHICS is concerned with evaluating, measuring and making improvements in the thermal and energy performance of steel-clad and steel-framed buildings. It addresses basic building physics performance at a laboratory and full-scale level, and the preparation of design guidance for commercial, industrial and residential buildings. It includes the development of design tools to assist users in assessing whole-building performance, and calibrates these tools against whole-building measurements, which will be obtained from this research. Opportunities for renewable energy and other energy-saving features will be assessed. This project focuses on objectives that are of particular interest for the design of new steel constructions regarding energy efficiency. ETHICS investigates the as-built performance by on-site tests regarding air tightness and heat transfer properties of the building envelope and by monitoring the energy consumption and thermal comfort of selected up-to-date steel buildings. As energy efficiency is a key requirement for design and construction of buildings in the future, this project provides well-founded scientific data, which prove the high energy performance of current steel constructions and work out details for further improvements to maintain and extend the position of steel products in the construction sector. KW - steel KW - metal structure KW - building technique KW - energy efficiency KW - thermal insulation KW - industrial research KW - research report Y1 - 2013 SN - 978-92-79-30789-8 U6 - https://doi.org/10.2777/17106 SN - 1831-9424 PB - Publications Office of the European Union CY - Luxembourg ER - TY - RPRT A1 - Kesti, Jyrki A1 - Mononen, Tarmo A1 - Lautso, Petteri A1 - Döring, Bernd A1 - Reger, Vitali A1 - Holopainen, R. A1 - Jung, N. A1 - Shemeikka, J. A1 - Nieminen, J. A1 - Reda, F. A1 - Lawson, Mark A1 - Botti, Andrea A1 - Hall, R. A1 - Zold, A. A1 - Buday, T. T1 - Zero energy solutions for multifunctional steel intensive commercial buildings (ZEMUSIC) - EUR 27627 N2 - The broad commercial objective of this project was the sustainable value creation in steel building technology by addressing the ways in which significant energy reductions can be made in the operation phase of multi-storey commercial buildings. A review on energy efficient commercial buildings in Europe has been carried out consisting of several case studies from different countries. The project included development of zero-energy concepts for reducing energy demand as well as concepts for heating, cooling and ventilation systems by utilising renewable energy sources in three different climates. Also alternative structural frame solutions were developed and analyzed in respect of structural and MEP (mechanical, electrical and plumbing solutions) features. An innovative long span floor system with integrated MEP routings promises a cost effective alternative for sophisticated ventilation distribution and radiant heating and cooling systems, allowing for high energy efficiency and high quality interior climate. The report includes also review of best architectural practices for integrated renewable energy solutions including different design strategies for building facades of zero energy buildings. Interesting results and design basis are also presented for steel energy pile concept, where structural foundation piles are utilized for ground energy harvesting. Life cycle cost calculations for near zero energy office building based on developed technologies show that a near zero energy construction is also profitable. The results and work methods of the project have been summarized in the form of design guidance that offers designers the knowledge gained in a form that can be easily understood. KW - steel KW - iron and steel industry KW - resistance of materials KW - materials technology KW - metal structure KW - research project KW - building industry KW - building materials KW - renewable energy KW - designs and models KW - research report KW - guide Y1 - 2015 SN - 978-92-79-54071-4 U6 - https://doi.org/10.2777/111520 SN - 1831-9424 N1 - Enthalten: Appendix Design Guide: Deliverable Report WP6.4 Design Guide for steel intensive nearly zero office buildings (83 Seiten) PB - Publications Office of the European Union CY - Luxembourg ER - TY - JOUR A1 - Fiedler, Thomas M. A1 - Ladd, Mark E. A1 - Bitz, Andreas T1 - SAR Simulations & Safety JF - NeuroImage Y1 - 2017 U6 - https://doi.org/10.1016/j.neuroimage.2017.03.035 SN - 1053-8119 IS - Epub ahead of print PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Noureddine, Yacine A1 - Kraff, Oliver A1 - Ladd, Mark E. A1 - Wrede, Karsten H. A1 - Chen, Bixia A1 - Quick, Harald H. A1 - Schaefers, Gregor A1 - Bitz, Andreas T1 - In vitro and in silico assessment of RF-induced heating around intracranial aneurysm clips at 7 Tesla JF - Magnetic Resonance in Medicine Y1 - 2017 U6 - https://doi.org/10.1002/mrm.26650 SN - 1522-2594 IS - Early view PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Fiedler, Thomas M. A1 - Ladd, Mark E. A1 - Bitz, Andreas T1 - RF safety assessment of a bilateral four-channel transmit/receive 7 Tesla breast coil: SAR versus temperature limits JF - Medical Physics Y1 - 2017 U6 - https://doi.org/10.1002/mp.12034 N1 - This article is corrected by: Errata: Erratum: “RF safety assessment of a bilateral four-channel transmit/receive 7 Tesla breast coil: SAR versus tissue temperature limits” [Med. Phys. 44(1), 143–157 (2017)] Volume 44, Issue 2, 772 VL - 44 IS - 1 SP - 143 EP - 157 ER - TY - JOUR A1 - Lagemaat, Miriam W. A1 - Vos, Eline K. A1 - Maas, Marnix C. A1 - Bitz, Andreas A1 - Orzada, Stephan A1 - Uden, Mark J. van A1 - Kobus, Thiele A1 - Heerschap, Arend A1 - Scheenen, Tom W. J. T1 - Phosphorus magnetic resonance spectroscopic imaging at 7 T in patients with prostate cancer JF - Investigative Radiology N2 - Objectives The aim of this study was to identify characteristics of phosphorus (³¹P) spectra of the human prostate and to investigate changes of individual phospholipid metabolites in prostate cancer through in vivo ³¹P magnetic resonance spectroscopic imaging (MRSI) at 7 T. Materials and Methods In this institutional review board–approved study, 15 patients with biopsy-proven prostate cancer underwent T₂-weighted magnetic resonance imaging and 3-dimensional ³¹P MRSI at 7 T. Voxels were selected at the tumor location, in normal-appearing peripheral zone tissue, normal-appearing transition zone tissue, and in the base of the prostate close to the seminal vesicles. Phosphorus metabolite ratios were determined and compared between tissue types. Results Signals of phosphoethanolamine (PE) and phosphocholine (PC) were present and well resolved in most ³¹P spectra in the prostate. Glycerophosphocholine signals were observable in 43% of the voxels in malignant tissue, but in only 10% of the voxels in normal-appearing tissue away from the seminal vesicles. In many spectra, independent of tissue type, 2 peaks resonated in the chemical shift range of inorganic phosphate, possibly representing 2 separate pH compartments. The PC/PE ratio in the seminal vesicles was highly elevated compared with the prostate in 5 patients. A considerable overlap of ³¹P metabolite ratios was found between prostate cancer and normal-appearing prostate tissue, preventing direct discrimination of these tissues. The only 2 patients with high Gleason scores tumors (≥4+5) presented with high PC and glycerophosphocholine levels in their cancer lesions. Conclusions Phosphorus MRSI at 7 T shows distinct features of phospholipid metabolites in the prostate gland and its surrounding structures. In this exploratory study, no differences in ³¹P metabolite ratios were observed between prostate cancer and normal-appearing prostate tissue possibly because of the partial volume effects of small tumor foci in large MRSI voxels. Y1 - 2014 U6 - https://doi.org/10.1097/RLI.0000000000000012 SN - 1536-0210 VL - 49 IS - 5 SP - 363 EP - 372 PB - Lippincott Williams & Wilkins CY - Philadelphia, Pa. ER - TY - JOUR A1 - Pyschny, D. A1 - Döring, Bernd A1 - Feldmann, M. T1 - Ermittlung der thermischen Leistungsfähigkeit des neuartigen multifunktionalen Verbunddeckensystems InaDeck JF - Bauingenieur : die richtungsweisende Zeitschrift im Bauingenieurswesen Y1 - 2014 SN - 0005-6650 N1 - Printausgabe in der Bibliothek Bayernallee vorhanden: 13 Z 049-2014 VL - 89 IS - 3 SP - 116 EP - 124 PB - VDI Fachmedien CY - Düsseldorf ER - TY - CHAP A1 - Feldmann, M. A1 - Döring, Bernd A1 - Pyschny, D. T1 - Floor systems; Sustainabilty analyses and assessments of steel bridges T2 - Sustainable steel buildings : a practical guide for structures and envelopes Y1 - 2016 SN - 978-1-118-74079-8 (PDF) SN - 978-1-118-74111-5 SP - 198 EP - 223 PB - Wiley Blackwell CY - Chichester, West Sussex ER - TY - BOOK A1 - Timme, Michael T1 - BGB Crashkurs: der sichere Weg durch die Prüfung Y1 - 2017 SN - 978-3-406-70586-1 PB - C.H. Beck CY - München ET - 4. Auflage ER - TY - JOUR A1 - Maas, Marnix C. A1 - Vos, Eline K. A1 - Lagemaat, Miriam W. A1 - Bitz, Andreas A1 - Orzada, Stephan A1 - Kobus, Thiele A1 - Kraff, Oliver A1 - Maderwald, Stefan A1 - Ladd, Mark E. A1 - Scheenen, Tom W. J. T1 - Feasibility of T₂-weighted turbo spin echo imaging of the human prostate at 7 tesla JF - Magnetic Resonance in Medicine N2 - Purpose To demonstrate that high quality T₂-weighted (T2w) turbo spin-echo (TSE) imaging of the complete prostate can be achieved routinely and within safety limits at 7 T, using an external transceive body array coil only. Methods Nine healthy volunteers and 12 prostate cancer patients were scanned on a 7 T whole-body system. Preparation consisted of B₀ and radiofrequency shimming and localized flip angle calibration. T₁ and T₂ relaxation times were measured and used to define the T2w-TSE protocol. T2w imaging was performed using a TSE sequence (pulse repetition time/echo time 3000–3640/71 ms) with prolonged excitation and refocusing pulses to reduce specific absorption rate. Results High quality T2w TSE imaging was performed in less than 2 min in all subjects. Tumors of patients with gold-standard tumor localization (MR-guided biopsy or prostatectomy) were well visualized on 7 T imaging (n = 3). The number of consecutive slices achievable within a 10-g averaged specific absorption rate limit of 10 W/kg was ≥28 in all subjects, sufficient for full prostate coverage with 3-mm slices in at least one direction. Conclusion High quality T2w TSE prostate imaging can be performed routinely and within specific absorption rate limits at 7 T with an external transceive body array. Y1 - 2014 U6 - https://doi.org/10.1002/mrm.24818 SN - 1522-2594 VL - 71 IS - 5 SP - 1711 EP - 1719 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Umutlu, Lale A1 - Kraff, Oliver A1 - Fischer, Anja A1 - Kinner, Sonja A1 - Maderwald, Stefan A1 - Nassenstein, Kai A1 - Nensa, Felix A1 - Grüneisen, Johannes A1 - Orzada, Stephan A1 - Bitz, Andreas A1 - Forsting, Michael A1 - Ladd, Mark E. A1 - Lauenstein, Thomas C. T1 - Seven-Tesla MRI of the female pelvis JF - European Radiology Y1 - 2013 U6 - https://doi.org/10.1007/s00330-013-2868-0 SN - 1432-1084 VL - 23 IS - 9 SP - 2364 EP - 2373 PB - Springer CY - Berlin ER - TY - JOUR A1 - Bitz, Andreas A1 - Felder, Jorg A1 - Wittig, Tilmann T1 - Designing MRI Coils with Aid of Simulation JF - Microwaves & RF Y1 - 2013 SN - 0745-2993 VL - 52 IS - 7 SP - 56 PB - Penton CY - Cleveland, Ohio ER - TY - JOUR A1 - Kraff, Oliver A1 - Wrede, Karsten H. A1 - Schoemberg, Tobias A1 - Dammann, Philipp A1 - Noureddine, Yacine A1 - Orzada, Stephan A1 - Ladd, Mark E. A1 - Bitz, Andreas T1 - MR safety assessment of potential RF heating from cranial fixation plates at 7 T JF - Medical Physics Y1 - 2013 U6 - https://doi.org/10.1118/1.4795347 SN - 2473-4209 VL - 40 IS - 4 SP - 042302-1 EP - 042302-10 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Umutlu, L. A1 - Maderwald, S. A1 - Kinner, S. A1 - Kraff, O. A1 - Bitz, Andreas A1 - Orzada, S. A1 - Johst, S. A1 - Wrede, K. A1 - Forsting, M. A1 - Ladd, M. E. A1 - Lauenstein, T. C. A1 - Quick, H. H. T1 - First-pass contrast-enhanced renal MRA at 7 Tesla: initial results JF - European Radiology Y1 - 2013 U6 - https://doi.org/10.1007/s00330-012-2666-0 SN - 1432-1084 VL - 23 IS - 4 SP - 1059 EP - 1066 PB - Springer CY - Berlin ER - TY - JOUR A1 - Umutlu, Lale A1 - Orzada, Stephan A1 - Kinner, Sonja A1 - Maderwald, Stefan A1 - Bronte, Irina A1 - Bitz, Andreas A1 - Kraff, Oliver A1 - Ladd, Susanne C. A1 - Antoch, Gerald A1 - Ladd, Mark E. A1 - Quick, Harald H. A1 - Lauenstein, Thomas C. T1 - Renal imaging at 7 Tesla: preliminary results JF - European Radiology N2 - Objective To investigate the feasibility of 7T MR imaging of the kidneys utilising a custom-built 8-channel transmit/receive radiofrequency body coil. Methods In vivo unenhanced MR was performed in 8 healthy volunteers on a 7T whole-body MR system. After B0 shimming the following sequences were obtained: 1) 2D and 3D spoiled gradient-echo sequences (FLASH, VIBE), 2) T1-weighted 2D in and opposed phase 3) True-FISP imaging and 4) a T2-weighted turbo spin echo (TSE) sequence. Visual evaluation of the overall image quality was performed by two radiologists. Results Renal MRI at 7T was feasible in all eight subjects. Best image quality was found using T1-weighted gradient echo MRI, providing high anatomical details and excellent conspicuity of the non-enhanced vasculature. With successful shimming, B1 signal voids could be effectively reduced and/or shifted out of the region of interest in most sequence types. However, T2-weighted TSE imaging remained challenging and strongly impaired because of signal heterogeneities in three volunteers. Conclusion The results demonstrate the feasibility and diagnostic potential of dedicated 7T renal imaging. Further optimisation of imaging sequences and dedicated RF coil concepts are expected to improve the acquisition quality and ultimately provide high clinical diagnostic value. Y1 - 2011 SN - 1432-1084 VL - 21 IS - 4 SP - 841 EP - 849 PB - Springer CY - Berlin ER - TY - CHAP A1 - Lind, Thorsten Patric T1 - Verwaltung und Verwertung der Insolvenzmasse. Sicherung der Insolvenzmasse, Entscheidung über die Verwertung : §§ 148-164 T2 - Insolvenzrecht : Kommentar / hrsg. von Martin Ahrens; Markus Gehrlein; Andreas Ringstmeier . - 3. Auflage Y1 - 2017 SN - 978-3-472-08669-7 N1 - Früher unter dem Titel: Fachanwaltskommentar Insolvenzrecht SP - 1437 EP - 1479 PB - Luchterhand CY - Köln ER - TY - JOUR A1 - Neu, Eugen A1 - Janser, Frank A1 - Khatibi, Akbar A. A1 - Orifici, Adrian C. T1 - Automated modal parameter-based anomaly detection under varying wind excitation JF - Structural Health Monitoring N2 - Wind-induced operational variability is one of the major challenges for structural health monitoring of slender engineering structures like aircraft wings or wind turbine blades. Damage sensitive features often show an even bigger sensitivity to operational variability. In this study a composite cantilever was subjected to multiple mass configurations, velocities and angles of attack in a controlled wind tunnel environment. A small-scale impact damage was introduced to the specimen and the structural response measurements were repeated. The proposed damage detection methodology is based on automated operational modal analysis. A novel baseline preparation procedure is described that reduces the amount of user interaction to the provision of a single consistency threshold. The procedure starts with an indeterminate number of operational modal analysis identifications from a large number of datasets and returns a complete baseline matrix of natural frequencies and damping ratios that is suitable for subsequent anomaly detection. Mahalanobis distance-based anomaly detection is then applied to successfully detect the damage under varying severities of operational variability and with various degrees of knowledge about the present operational conditions. The damage detection capabilities of the proposed methodology were found to be excellent under varying velocities and angles of attack. Damage detection was less successful under joint mass and wind variability but could be significantly improved through the provision of the currently encountered operational conditions. Y1 - 2016 U6 - https://doi.org/10.1177/1475921716665803 SN - 1475-9217 VL - 15 IS - 6 SP - 1 EP - 20 PB - Sage CY - London ER - TY - BOOK A1 - Gümpel, Paul A1 - Blumhofer, Gunter A1 - Dören, Horst-Peter A1 - Gebel, Wolfgang A1 - Heimann, Winfried A1 - Morach, Rudolf A1 - Schmitz, Karl W. T1 - Rostfreie Stähle : Grundwissen, Konstruktions- und Verarbeitungshinweise Y1 - 2016 SN - 978-3-8169-3148-5 PB - Expertverlag CY - Renningen ET - 5., durchgesehene Aufl. ER - TY - JOUR A1 - Zange, Jochen A1 - Schopen, Kathrin A1 - Albracht, Kirsten A1 - Gerlach, Darius A. A1 - Frings-Meuthen, Petra A1 - Maffiuletti, Nicola A. A1 - Bloch, Wilhelm A1 - Rittweger, Jörn T1 - Using the Hephaistos orthotic device to study countermeasure effectiveness of neuromuscular electrical stimulation and dietary lupin protein supplementation, a randomised controlled trial JF - Plos one Y1 - 2017 U6 - https://doi.org/10.1371/journal.pone.0171562 VL - 12 IS - 2 ER - TY - CHAP A1 - Goldmann, Jan-Peter A1 - Braunstein, Bjoern A1 - Heinrich, Kai A1 - Sanno, Maximilian A1 - Stäudle, Benjamin A1 - Ritzdorf, Wolfgang A1 - Brüggemann, Gert-Peter A1 - Albracht, Kirsten T1 - Joint work of the take-off leg during elite high jump T2 - Proceedings of the 33th International Conference on Biomechanics in Sports (ISBS) Y1 - 2015 ER - TY - CHAP A1 - Droszez, Anna A1 - Sanno, Maximilian A1 - Goldmann, Jan-Peter A1 - Albracht, Kirsten A1 - Brüggemann, Gerd-Peter A1 - Braunstein, Bjoern T1 - Differences between take-off behavior during vertical jumps and two artistic elements T2 - 34th International Conference of Biomechanics in Sport, Tsukuba, Japan, July 18-22, 2016 Y1 - 2016 SN - 1999-4168 SP - 577 EP - 580 ER - TY - CHAP A1 - Abel, Thomas A1 - Bonin, Dominik A1 - Albracht, Kirsten A1 - Zeller, Sebastian A1 - Brüggemann, Gert-Peter A1 - Burkett, Brendan A1 - Strüder, Heiko K. T1 - Kinematic profile of the elite handcyclist T2 - 28th International Conference on Biomechanics in Sports, Marquette, Michigan, USA, July 19 – 23, 2010 Y1 - 2017 SN - 1999-4168 SP - 140 EP - 141 ER - TY - CHAP A1 - Braunstein, Bjoern A1 - Goldmann, Jan-Peter A1 - Albracht, Kirsten A1 - Sanno, Maximilian A1 - Willwacher, Steffen A1 - Heinrich, Kai A1 - Herrmann, Volker A1 - Brüggemann, Gert-Peter T1 - Joint specific contribution of mechanical power and work during acceleration and top speed in elite sprinters T2 - 31 International Conference on Biomechanics in Sports, Taipei, Taiwan, July 07 - July 22, 2013 Y1 - 2013 SN - 1999-4168 ER - TY - CHAP A1 - Geisler, Simon A1 - Pieper, Martin T1 - Mathematik PLuS als E-Book. Kann ein E-Book zur Ingenieursmathematik alle Lerntypen ansprechen? T2 - Das elektronische Schulbuch 2016 Y1 - 2017 SN - 978-3-643-13475-2 SP - 99 EP - 111 PB - LIT Verlag CY - Berlin ER - TY - JOUR A1 - Enning, Manfred A1 - Pfaff, Raphael T1 - Güterwagen 4.0 - Der Güterwagen für das Internet der Dinge. Teil 1: Gesamtsystembetrachtung und grundlegendes Konzept JF - ETR - Eisenbahntechnische Rundschau Y1 - 2017 SN - 0013-2845 VL - 66 IS - 1/2 SP - 12 EP - 16 PB - DVV Media Group CY - Hamburg ER - TY - JOUR A1 - Enning, Manfred T1 - Vom "König der Landstraße" zur "Ameise 4.0" JF - ETR - Eisenbahntechnische Rundschau N2 - Auf Eisenbahn- und Logistikkonferenzen werden gelegentlich Videos von Blattschneiderameisen gezeigt, die effizient und selbstorganisiert große Mengen Material durch den Dschungel transportieren. Daran sollen wir uns ein Beispiel nehmen. Y1 - 2017 SN - 0013-2845 VL - 66 IS - 1/2 SP - 3 PB - DVV Media Group CY - Hamburg ER - TY - THES A1 - Albracht, Kirsten T1 - Influence of mechanical properties of the leg extensor muscletendon units on running economy Y1 - 2010 N1 - Cologne, German Sport Univ., Diss., 2010 PB - Deutsche Sporthochschule Köln CY - Köln ER - TY - JOUR A1 - Kolditz, Melanie A1 - Albin, Thivaharan A1 - Brüggemann, Gert-Peter A1 - Abel, Dirk A1 - Albracht, Kirsten T1 - Robotergestütztes System für ein verbessertes neuromuskuläres Aufbautraining der Beinstrecker JF - at - Automatisierungstechnik N2 - Neuromuskuläres Aufbautraining der Beinstrecker ist ein wichtiger Bestandteil in der Rehabilitation und Prävention von Muskel-Skelett-Erkrankungen. Effektives Training erfordert hohe Muskelkräfte, die gleichzeitig hohe Belastungen von bereits geschädigten Strukturen bedeuten. Um trainingsinduzierte Schädigungen zu vermeiden, müssen diese Kräfte kontrolliert werden. Mit heutigen Trainingsgeräten können diese Ziele allerdings nicht erreicht werden. Für ein sicheres und effektives Training sollen durch den Einsatz der Robotik, Sensorik, eines Regelkreises sowie Muskel-Skelett-Modellen Belastungen am Zielgewebe direkt berechnet und kontrolliert werden. Auf Basis zweier Vorstudien zu möglichen Stellgrößen wird der Aufbau eines robotischen Systems vorgestellt, das sowohl für Forschungszwecke als auch zur Entwicklung neuartiger Trainingsgeräte verwendet werden kann. Y1 - 2016 U6 - https://doi.org/10.1515/auto-2016-0044 SN - 2196-677X VL - 64 IS - 11 SP - 905 EP - 914 PB - De Gruyter CY - Berlin ER - TY - CHAP A1 - Kolditz, Melanie A1 - Albracht, Kirsten A1 - Fasse, Alessandro A1 - Albin, Thivaharan A1 - Brüggemann, Gert-Peter A1 - Abel, Dirk T1 - Evaluation of an industrial robot as a leg press training device T2 - XV International Symposium on Computer Simulation in Biomechanics July 9th – 11th 2015, Edinburgh, UK Y1 - 2015 SP - 41 EP - 42 ER - TY - CHAP A1 - Kolditz, Melanie A1 - Albin, Thivaharan A1 - Fasse, Alessandro A1 - Brüggemann, Gert-Peter A1 - Abel, Dirk A1 - Albracht, Kirsten T1 - Simulative Analysis of Joint Loading During Leg Press Exercise for Control Applications T2 - IFAC-PapersOnLine Y1 - 2015 U6 - https://doi.org/10.1016/j.ifacol.2015.10.179 N1 - IFAC-PapersOnLine 48-20; Conference Paper Archive VL - 48 IS - 20 SP - 435 EP - 440 ER - TY - JOUR A1 - de Blois, Eric A1 - de Zanger, Rory M. S. A1 - Paulßen, Elisabeth A1 - Sze Chan, Ho A1 - Breeman, Wouter A. P. T1 - Semi-automated system for concentrating 68Ga-eluate to obtain high molar and volume concentration of 68Ga-Radiopharmaca for preclinical applications JF - Nuclear Medicine and Biology N2 - 68Ga-radiopharmaceuticals are common in the field of Nuclear Medicine to visualize receptor-mediated processes. In contrast to straightforward labeling procedures for clinical applications, preclinical in vitro and in vivo applications are hampered for reasons like e.g. volume restriction, activity concentration, molar activity and osmolality. Therefore, we developed a semiautomatic system specifically to overcome these problems. A difficulty appeared unexpectedly, as intrinsic trace metals derived from eluate (Zn, Fe and Cu) are concentrated as well in amounts that influence radiochemical yield and thus lower molar activity. Y1 - 2018 U6 - https://doi.org/10.1016/j.nucmedbio.2018.06.006 VL - 64-65 SP - 16 EP - 21 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Schmidts, Oliver A1 - Kraft, Bodo A1 - Schreiber, Marc A1 - Zündorf, Albert T1 - Continuously evaluated research projects in collaborative decoupled environments T2 - 2018 ACM/IEEE 5th International Workshop on Software Engineering Research and Industrial PracticePractice, May 29, 2018, Gothenburg, Sweden : SER&IP' 18 N2 - Often, research results from collaboration projects are not transferred into productive environments even though approaches are proven to work in demonstration prototypes. These demonstration prototypes are usually too fragile and error-prone to be transferred easily into productive environments. A lot of additional work is required. Inspired by the idea of an incremental delivery process, we introduce an architecture pattern, which combines the approach of Metrics Driven Research Collaboration with microservices for the ease of integration. It enables keeping track of project goals over the course of the collaboration while every party may focus on their expert skills: researchers may focus on complex algorithms, practitioners may focus on their business goals. Through the simplified integration (intermediate) research results can be introduced into a productive environment which enables getting an early user feedback and allows for the early evaluation of different approaches. The practitioners’ business model benefits throughout the full project duration. Y1 - 2018 SP - 1 EP - 9 PB - ACM CY - New York, NY ER - TY - JOUR A1 - Olbertz, Klaus A1 - Groth, Alexandra T1 - Änderungen durch das Flexirentengesetz - Neue Anreize zur Beschäftigung von Rentnern JF - NWB - Steuer- und Wirtschaftsrecht Y1 - 2018 SN - 1860-9449 IS - 10 SP - 738 EP - 748 PB - NWB Verlag CY - Herne ER - TY - JOUR A1 - Olbertz, Klaus T1 - Aufhebungsverträge und Sperrzeit beim Bezug von Arbeitslosengeld - Neue Gestaltungsmöglichkeiten aufgrund geänderter Geschäftsanweisung der Bundesagentur für Arbeit JF - NWB - Steuer- und Wirtschaftsrecht Y1 - 2018 SN - 1860-9449 IS - 21 SP - 1588 EP - 1593 ER - TY - JOUR A1 - Olbertz, Klaus A1 - Groth, Alexandra T1 - Elektrofahrzeuge als Dienstfahrzeuge - Arbeitgeberseitige Gestellung von Elektromobilität und ihre arbeitsvertraglichen Gestaltungserfordernisse JF - NWB - Steuer- und Wirtschaftsrecht N2 - Elektromobilität ist das Thema der Zukunft. Schon jetzt hat es sich die Bundesregierung zur Aufgabe gemacht, hierzulande bis 2030 den Absatz von Elektroautos kontinuierlich auf sechs Mio. Fahrzeuge zu steigern. Und auch die Nachfrage nach Elektrofahrrädern steigt zunehmend. Vor allem der derzeit durch den Gesetzgeber gewährte Umweltbonus sowie weitere steuerliche Anreize machen den Einsatz von Elektroautos und -fahrrädern als Dienstfahrzeuge auch für Arbeitgeber zunehmend attraktiv. Will der Arbeitgeber seinen Arbeitnehmern Elektrofahrzeuge überlassen, stellt sich die Frage nach der Gestaltung der entsprechenden Überlassungsverträge. Der nachfolgende Beitrag gibt hierzu einen Überblick und beinhaltet Formulierungshilfen für die Vertragsgestaltung. Y1 - 2018 SN - 1860-9449 IS - 50 SP - 3812 ER - TY - JOUR A1 - Olbertz, Klaus T1 - Auswirkungen des neuen Entgelttransparenzgesetzes - Viel Aufwand für Unternehmen, wenig Greifbares für Arbeitnehmer JF - NWB - Steuer- und Wirtschaftsrecht Y1 - 2018 SN - 1860-9449 IS - 40 SP - 3068 EP - 3075 ER - TY - JOUR A1 - Olbertz, Klaus A1 - Groth, Alexandra T1 - Die Reform des Mutterschutzrechts - Überblick über die wesentlichen Änderungen JF - NWB - Steuer- und Wirtschaftsrecht Y1 - 2018 SN - 1860-9449 IS - 25 SP - 1883 EP - 1891 PB - NWB Verlag GmbH & Co. KG CY - Herne ER - TY - JOUR A1 - Olbertz, Klaus T1 - Änderung des AGB-Rechts: Erforderliche Anpassung von Arbeitsverträgen - Insbesondere Ausschlussfristen sind betroffen JF - NWB - Steuer- und Wirtschaftsrecht N2 - Der Gesetzgeber hat kürzlich eine Änderung des Rechts der AGB beschlossen. Diese hat für Arbeitgeber zur Folge, dass sie ihre Muster-Arbeitsverträge anpassen müssen, wenn sie andernfalls drohende wirtschaftliche Nachteile vermeiden wollen. Mit Wirkung zum 1.10.2016 hat der Gesetzgeber § 309 Nr. 13 BGB neu gefasst. Nach der bisherigen Fassung waren vorformulierte Vertragsbedingungen unwirksam, die Anzeigen oder Erklärungen gegenüber dem Vertragspartner an „eine strengere Form als die Schriftform“ banden. Seit dem 1.10.2016 sind vorformulierte Vertragsbedingungen unwirksam, die derartige Anzeigen oder Erklärungen an „eine strengere Form als die Textform“ binden. Diese gesetzliche Neuregelung wirkt sich maßgeblich auf die Gestaltung von Arbeitsverträgen aus. Dies betrifft insbesondere die in Arbeitsverträgen gebräuchlichen Ausschlussfristen. Y1 - 2018 SN - 1860-9449 IS - 40 SP - 3028 EP - 3032 ER - TY - JOUR A1 - Olbertz, Klaus T1 - Die neue EU-Datenschutz-Grundverordnung - Allgemeiner Überblick und die einzelnen Folgen für den Beschäftigtendatenschutz JF - NWB - Steuer- und Wirtschaftsrecht N2 - Nach jahrelangem Ringen haben sich die zuständigen Institutionen der EU auf ein einheitliches Datenschutzgesetz, die Datenschutz-Grundverordnung (DS-GV), geeinigt. Diese ist am 25.5.2016 in Kraft getreten und wird nach einer zweijährigen Übergangszeit am 25.5.2018 für alle EU-Mitgliedstaaten unmittelbar verbindlich. Verstöße hiergegen können erhebliche Sanktionen nach sich ziehen. Es drohen Bußgelder von bis zu 20 Mio. € oder bis zu 4 % des gruppenweiten Jahresumsatzes – je nachdem, welcher Betrag höher ist. Die betriebliche Praxis tut also gut daran, sich rechtzeitig mit den neuen Anforderungen zu befassen und diese umzusetzen. Dieser Beitrag gibt einen ersten Überblick über die sich aus der DS-GV ergebenden Konsequenzen für die betriebliche Praxis im Allgemeinen sowie im Hinblick auf die Datenverarbeitung im Beschäftigungskontext im Besonderen. Y1 - 2018 SN - 1860-9449 IS - 28 SP - 2118 EP - 2124 ER - TY - JOUR A1 - Olbertz, Klaus T1 - Arbeitszeit und Vergütungspflicht des Arbeitgebers - Entstehung des Lohnanspruchs und arbeitsvertragliche Gestaltungsmöglichkeiten JF - NWB - Steuer- und Wirtschaftsrecht N2 - Kaum ein anderer Begriff hält so viele Varianten und Facetten bereit wie die Arbeitszeit. Für die betriebliche Praxis stellt sich dabei regelmäßig die Frage, was überhaupt zur Arbeitszeit gehört, entsprechend als solche zu vergüten ist und welche Optionen bei der Gestaltung der Arbeitsverträge bestehen. Der folgende Praxisleitfaden gibt einen Überblick über die aktuelle Rechtslage und enthält zugleich Hinweise für die Vertragsgestaltung. Die hierzu insbesondere in den letzten Jahren ergangenen zahlreichen aktuellen Gerichtsentscheidungen werden besonders berücksichtigt. Y1 - 2018 SN - 1860-9449 IS - 14 SP - 1026 EP - 1037 ER - TY - JOUR A1 - Olbertz, Klaus T1 - Teilzeitarbeit - Die verschiedenen Formen sowie deren Voraussetzungen und Rechtsfolgen JF - NWB - Steuer- und Wirtschaftsrecht Y1 - 2018 SN - 1860-9449 IS - 43 SP - 3182 EP - 3195 PB - NWB Verlag CY - Herne ER - TY - JOUR A1 - Olbertz, Klaus T1 - Die arbeitsrechtliche Stellung des Prokuristen - Handelsrechtlicher Kompetenzzuwachs mit arbeitsrechtlichen Konsequenzen JF - NWB - Steuer- und Wirtschaftsrecht N2 - Die Beschäftigung von Prokuristen ist gängige betriebliche Praxis. Unternehmen stehen dabei immer wieder vor der Frage, ob und welche Arbeitnehmer sie zu Prokuristen bestellen sollen. Nicht selten bleiben hierbei die arbeitsrechtlichen Konsequenzen, die mit der Bestellung eines Arbeitnehmers zum Prokuristen einhergehen können, unberücksichtigt, wie diverse Gerichtsentscheidungen zeigen. Dieser Beitrag soll einen Überblick über die arbeitsrechtlichen Folgen bei der Beschäftigung von Prokuristen geben und der betrieblichen Praxis somit gleichzeitig als Entscheidungshilfe dienen, wenn es um das Ob und Wie der möglichen Bestellung eines Arbeitnehmers zum Prokuristen geht. Y1 - 2018 SN - 1860-9449 IS - 21 SP - 1591 EP - 1596 PB - NWB-Verlag CY - Herne ER - TY - JOUR A1 - Lind, Thorsten Patric T1 - Neues zur Geschäftsführerhaftung nach § 64 GmbHG - Zugleich Anmerkung zu BGH vom 19.12.2017 - II ZR 88/16, DB 2018 S. 307, und vom 04.07.2017 - II ZR 319/15, DB 2017 S. 1959 - JF - Der Betrieb Y1 - 2018 SN - 0005-9935 IS - 17 SP - 1003 EP - 1008 PB - Fachmedien Otto Schmidt CY - Düsseldorf ER -