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@inproceedings{faucris.239373047,
abstract = {In this paper we introduce the OMNeT++-framework 5G-Sim-V2I/N which enables to simulate 5G V2I (Vehicle to infrastructure) / V2N (Vehicle to network) use cases with applications comprising the whole 5G user plane. It enhances the well-known frameworks SimuLTE and Veins with several 5G specification features (e.g., ITU-Channel Models, numerology, calculation of the Transport Block Size, etc.) and comes by default with a motorway and an urban scenario modified for the use in dense road scenarios. As an application example we used the framework to simulate several hundred cars in both scenarios running different parallel applications in each car. By measuring several parameters on the application layer, which are relevant for evaluating the Quality-of-Service (QoS) of each application, we illustrate the abilities of the framework.},
address = {Dubrovnik, Croatia},
author = {Deinlein, Thomas and German, Reinhard and Djanatliev, Anatoli},
booktitle = {2020 European Conference on Networks and Communications (EuCNC): Wireless, Optical and Satellite Networks (WOS) (EuCNC2020 - WOS)},
date = {2020-06-16/2020-06-17},
doi = {10.1109/EuCNC48522.2020.9200949},
faupublication = {yes},
keywords = {5G; V2I; V2N; OMNeT++; Discrete Event Simulation},
peerreviewed = {Yes},
title = {{5G}-{Sim}-{V2I}/{N}: {Towards} a {Simulation} {Framework} for the {Evaluation} of {5G} {V2I}/{V2N} {Use} {Cases}},
venue = {Dubrovnik, Croatia (Virtual)},
year = {2020}
}
@inproceedings{faucris.115008344,
abstract = {Smart grid, which is a set of enabling technologies, is seen by experts as very promising vision that has the potential to encounter the challenges of next-generation power grid. Smart grid consists mainly of power and communication networks, therefore investigating new methods and innovations in smart grid requires coupling these two worlds together. Development and evaluation of complex smart grid applications would benefit from efficient simulation environment. The traditional approach is to employ two simulators, one for communication and the other for power grid, nevertheless this approach would require coordination of multiple simulators, each having its own intrinsic timing and relationship attributes. In this paper we present an abstracted model-based approach that models and simulates communication and power systems within one simulator. We discuss the design and implementation of different components in this simulation environment. This way of implementation enables easy and rapid modeling, simulation and investigation of new methods and innovations of new smart grid applications. We also present preliminary simulation results of a case study evaluating atypical smart grid application where we show the benefit of empowering the power grid with communication capabilities. © 2012 IEEE.},
author = {Awad, Abdalkarim and Bazan, Peter and German, Reinhard},
booktitle = {EMS 2012 - UKSim/AMSS 6th European Symposium on Computer Modeling and Simulation},
date = {2012-11-14/2012-11-16},
doi = {10.1109/EMS.2012.21},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2012.tech.IMMD.IMMD7.abstra},
pages = {305-310},
peerreviewed = {Yes},
publisher = {IEEE},
title = {{Abstract}-{Based} {Methodology} for {Modeling} and {Simulation} of {Smart} {Grid} {Components}},
venue = {Valetta},
year = {2012}
}
@inproceedings{faucris.278811451,
abstract = {The evaluation of large-scale vehicular networks has proven difficult. The researcher has to either do a lot of experiments, reduce simulation accuracy or endure simulation runtimes prohibiting a reasonable investigation. We present a framework that allows preserving simulation accuracy while maintaining reasonable simulation times by cutting the to-be-investigated area into individual tiles. Instead of running on a single CPU core we are able to run the simulation on hundreds of HPC servers in parallel. This yields a speedup of several orders of magnitude, allowing the simulation of entire cities. We validate our approach by investigating different access-point distributions for the city of Ingolstadt.
We consider a virtual battery energy storage consisting of individual storage systems used for both, maximization of household PV-power own-consumption and provision of frequency containment reserve power. The frequency containment reserve power provision is managed by a central controller by setting benchmarks for each individual storage and also autonomously by each individual system based on the frequency deviation to its nominal value. In previous work, we showed that in such a system, a uniform frequency containment reserve power dispersion to all individual storage systems causes high losses due to the bad efficiency of the rectifiers in low part-load operation and that this issue can be solved by only using subsets of the virtual battery energy storage for frequency containment reserve power provision. This paper suggests a generalized control algorithm, which is also applicable in systems with heterogeneous individual storages and can easily be parametrized and utilized in different systems. We show analytically that the algorithm disperses the power in a way that each participating unit operates close to the optimal operating point no matter the power limits and energy contents of the individual storages. We also show in detailed simulations that this new algorithm works better than the previously proposed one in case of homogeneous systems.},
author = {Schlund, Jonas and German, Reinhard},
booktitle = {Proceedings of the 2017 International Conference on Smart Grid and Smart Cities},
date = {2017-07-23/2017-07-26},
doi = {10.1109/ICSGSC.2017.8038550},
faupublication = {yes},
keywords = {frequency containment reserve power; virtual battery energy storage; decentralized energy systems; efficiency; photovoltaic own-consumption},
peerreviewed = {Yes},
title = {{A} {Control} {Algorithm} for a {Heterogeneous} {Virtual} {Battery} {Storage} {Providing} {FCR} {Power}},
venue = {Singapore},
year = {2017}
}
@inproceedings{faucris.119108924,
address = {Bamberg},
author = {Pruckner, Marco and Thurner, Christoph and Martin, Alexander and German, Reinhard},
booktitle = {MMB & DFT 2014, Proceedings of the International Workshop SOCNET 2014 and FGENET 2014},
editor = {K.~Fischbach, M.~Großmann, U.~Krieger, T.~Staake},
faupublication = {yes},
pages = {97 -- 104},
peerreviewed = {Yes},
title = {{A} {Coupled} {Optimization} and {Simulation} {Model} for the {Energy} {Transition}},
volume = {16},
year = {2014}
}
@inproceedings{faucris.116208664,
abstract = {In Germany, and in particular in Bavaria, the energy transition towards a more sustainable energy system is an important issue. The nuclear phase-out until 2023 is enacted and the extension of renewable energy sources takes place faster than expected. Optimization models can help to find the optimal extension path for renewable and conventional energy sources from an investment cost perspective. In addition, simulation models can be used to analyze how the electricity demand could be covered by different energy sources in a higher time resolution. In this paper we describe our optimization and simulation framework for the energy transition in Bavaria to perform an energy system analysis. Additionally, we present a coupled approach to analyze the annual energy balances for an optimal extension path.
},
address = {Bamberg},
author = {Pruckner, Marco and Thurner, Christoph and Martin, Alexander and German, Reinhard},
booktitle = {Proceedings of the International Workshop on Demand Modeling and Quantitative Analysis of Future Generation Energy Networks and Energy Efficient Systems},
date = {2014-03-17/2014-03-19},
faupublication = {yes},
isbn = {978-3-86309-208-5},
keywords = {Electricity transition, Energy System Analysis, Hybrid Simulation,
Energy optimization, Unit commitment problem},
note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.acoupl},
pages = {97-104},
publisher = {University of Bamberg Press},
title = {{A} {Coupled} {Optimization} and {Simulation} {Model} for the {Energy} {Transition} in {Bavaria}},
venue = {Bamberg, Germany},
year = {2014}
}
@article{faucris.217910305,
abstract = {In this paper we propose and analyze a community-driven platform for flexibility provision based on a distributed ledger. We introduce and analyze the platform for the use case of a self-organized decentralized virtual power plant consisting of a local community of individual prosumers with photovoltaic-storages located on a low voltage feeder. Like a virtual power plant, it aggregates small-scale assets and is able to provide ancillary services in the form of active power provision to the electrical power system. However, the decentralized virtual power plant provides a direct flexibility market access of the distributed assets without the need for a third party. Thus, balancing group managers or system operators can directly interact with the distributed assets in an aggregated way without the need for an aggregator. The solution approach uses a heuristic algorithm for the coordination combined with a distributed ledger and democratic consensus within the community.},
author = {Schlund, Jonas and German, Reinhard},
doi = {10.1186/s42162-019-0068-0},
faupublication = {yes},
journal = {Energy Informatics},
keywords = {Flexibility platform; Virtual power plant; Community energy; Ancillary
services; Blockchain; Smart contract; Photovoltaics; Battery systems},
pages = {1-20},
peerreviewed = {Yes},
title = {{A} distributed ledger based platform for community-driven flexibility provision},
volume = {2},
year = {2019}
}
@inproceedings{faucris.216643886,
abstract = {Current driving functions are continuously improved. As target vision of this development, the final state of unattended reliable navigation under all possible circumstances is defined. Besides the requirements and the test cases, the main accompanying specification artifact for the iterative development of such functions is the scenario catalog, which is usually created by hand. The included scenarios often differ in terms of the used abstraction level, the chosen natural language, and the degree of completeness depending on the current development phase. There is currently no methodology available, which allows the iterative evolution of textual scenario descriptions based on natural language and that can be used for the development of automated driving functions (ADF). As a solution approach, the methodology scenario-accompanied, text-based, iterative Evaluation of automated driving Functions (stiEF) as embedding workflow and an embedded textual domain-specific language (DSL) for scenario creation are presented. The DSL facilitates the iterative multilingual evolution of scenario descriptions and the generation of the corresponding simulation parameters and scenario sketches. For this, scenarios with different levels of detail are used as central specification artifacts. This approach avoids ambiguities in the descriptions, guides the user through their creation process, and ensures completeness. This is demonstrated by a prototypical realizatio},
author = {Bock, Florian and Sippl, Christoph and Heinz, Aaron and Lauer, Christoph and German, Reinhard},
booktitle = {2019 Annual IEEE International Systems Conference (SysCon)},
date = {2019-04-08/2019-04-11},
doi = {10.1109/syscon.2019.8836912},
faupublication = {yes},
keywords = {Automated Driving; Domain-Specific Language; Generation; Iterative; Scenario Description},
peerreviewed = {Yes},
title = {{Advantageous} {Usage} of {Textual} {Domain}-{Specific} {Languages} for {Scenario}-{Driven} {Development} of {Automated} {Driving} {Functions}},
venue = {Hyatt Grand Cypress Hotel, One Grand Cypress Blvd., 32836 Orlando, Florida, Vereinigte Staaten von Amerika},
year = {2019}
}
@inproceedings{faucris.111051864,
address = {Ottawa, Canada},
author = {Käßmeyer, Michael and Bazan, Peter and Schurius, Markus and German, Reinhard},
booktitle = {Formal Verification for Practicing Engineers (FVPE)},
date = {2016-10-23/2016-10-27},
doi = {10.1109/ISSREW.2016.25},
faupublication = {yes},
isbn = {9781509036011},
keywords = {Dependability Analysis; Fault Tree; Minimal Cut Sets; Multi-Valued Decision Diagram; Product Line Engineering; States},
note = {UnivIS-Import:2017-12-18:Pub.2016.tech.IMMD.IMMD7.aforma},
pages = {271-277},
peerreviewed = {Yes},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
title = {{A} {Formal} {Model} for {Stateful} and {Variant}-rich {Automotive} {Functions}},
venue = {Ottawa, ON},
year = {2016}
}
@inproceedings{faucris.116888244,
abstract = {In this paper we investigate the application of Network Calculus for industrial automation networks to obtain performance bounds (latency, jitter and backlog). In our previous work we identified the modeling of industrial networks as the most challenging aspect since in industry most users do not have detailed knowledge about the traffic load caused by applications. However, exactly this knowledge is indispensable when it comes to modeling the corresponding arrival curves. Thus, we suggest the use of generalized traffic profiles, which are provided by the engineering tool. During the engineering process, the user has to specialize these profiles to meet the application configurations. The engineering tool derives the corresponding arrival curves from the specialized profiles and calculates the performance bounds using Network Calculus. To guarantee that the calculated performance bounds are kept during the runtime of the industrial automation, we must ensure that the real traffic flows do not exceed their engineered arrival curves. We therefore propose the use of shapers at the edge of the network domain. The shaper configurations can be automatically derived from the engineered arrival curves of the flows. © 2014 Springer International Publishing.},
author = {Hielscher, Kai-Steffen and Klehmet, Ulrich and German, Reinhard and Kerschbaum, Sven},
booktitle = {Proceedings MMB & DFT 2014},
doi = {10.1007/978-3-319-05359-2{\_}13},
faupublication = {yes},
isbn = {978-3-319-05358-5},
keywords = {industrial automation networks; Network Calculus; performance guarantees; quality of service (QoS)},
note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.aframe},
pages = {177-191},
publisher = {Springer},
title = {{A} {Framework} for {Establishing} {Performance} {Guarantees} in {Industrial} {Automation} {Networks}},
url = {http://www7.informatik.uni-erlangen.de/~klehmet/publications/Papers/In{\_}Proceeding{\_}MMB2014.pdf},
venue = {Bamberg},
year = {2014}
}
@inproceedings{faucris.118783324,
author = {Hartmann, Christian and Yupatova, Anna and Reichenbach, Marc and Fey, Dietmar and German, Reinhard},
booktitle = {Proceedings of HIS Workshop. Design, Automation & Test in Europe (DATE)},
faupublication = {yes},
keywords = {GRK-1773},
note = {UnivIS-Import:2015-04-17:Pub.2015.tech.IMMD.IMMD3.aholis},
pages = {28-29},
title = {{A} {Holistic} {Approach} for {Modeling} and {Synthesis} of {Image} {Processing} {Applications} for {Heterogeneous} {Computing} {Architectures}},
venue = {Grenoble},
year = {2015}
}
@incollection{faucris.210435865,
address = {Cham},
author = {Awad, Abdalkarim and Bazan, Peter and German, Reinhard},
booktitle = {Systems Modeling: Methodologies and Tools},
doi = {10.1007/978-3-319-92378-9{\_}19},
editor = {Antonio Puliafito, Kishor S. Trivedi},
faupublication = {yes},
month = {Jan},
pages = {303-317},
peerreviewed = {Yes},
publisher = {Springer},
series = {EAI/Springer Innovations in Communication and Computing},
title = {{A} {House} {Appliances}-{Level} {Co}-simulation {Framework} for {Smart} {Grid} {Applications}},
year = {2019}
}
@inproceedings{faucris.115022424,
abstract = {Due to the transition towards a sustainable energy supply, many electricity generation systems are faced with great challenges worldwide. Highly volatile renewable energy sources play an important role in the future electricity generation mix and should help compensate the phase-out of nuclear power in countries such as Germany. Simulation-based energy system analyses can support the conversion into a sustainable future energy system and are intended to find risks and miscalculations. In this paper we present models for the main components of the electricity generation system. We use a hybrid simulation approach with system dynamics and discrete event modules. This modular design allows quick model adoptions for different scenarios. Simulation results show the development of the future annual electricity balance, CO2 emission balance, electricty imports and exports, and the wholesale price of electricity. © 2013 IEEE.},
author = {Pruckner, Marco and German, Reinhard},
booktitle = {Proceedings of the 2013 Winter Simulation Conference},
date = {2013-12-08/2013-12-11},
doi = {10.1109/WSC.2013.6721568},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2013.tech.IMMD.IMMD7.ahybri},
pages = {1881-1892},
title = {{A} {Hybrid} {Simulation} {Model} for {Large}-{Scaled} {Electricity} {Generation} {Systems}},
venue = {Washington DC, USA},
year = {2013}
}
@inproceedings{faucris.118786844,
abstract = {Replacing combustion vehicles with electric vehicles is a major step towards reducing CO 2 emissions. With regard to this shift, in particular commercial or governmental vehicle fleets are believed to be early adopters. However, the electrification of vehicle fleets is a complex task since it can have a huge impact on companies’ day-to-day-business. This article presents a lightweight simulation framework to support the planning process and to study important effects of vehicle fleet electrification. Our discrete event-based approach allows to investigate economical and environmental aspects, such as the impact on operating costs, the required electric energy, or the amount of CO 2 emissions. Based on a given trip schedule (consisting of start time, distance, and duration), the framework allows deriving all necessary information, among others to dimension both the vehicle fleet and the charging infrastructure. We show the usefulness and the capability of our model by presenting results for a mid-sized company’s vehicle fleet comprising 100 vehicles.},
address = {Glasgow, Scotland},
author = {Berndt, Rüdiger and Schellenberg, Sebastian and Eckhoff, David and German, Reinhard},
booktitle = {81th IEEE Vehicular Technology Conference Spring (VTC 2015-Spring)},
date = {2015-05-11/2015-05-14},
doi = {10.1109/VTCSpring.2015.7145614},
editor = {IEEE},
faupublication = {yes},
keywords = {Electromobility; Discrete Event-based Simulation;},
note = {UnivIS-Import:2015-04-17:Pub.2015.tech.IMMD.IMMD7.alight},
pages = {1-5},
peerreviewed = {Yes},
title = {{A} {Lightweight} {Simulation} {Framework} for the {Analysis} of {Electrified} {Vehicle} {Fleets}},
venue = {Glasgow, Schottland},
year = {2015}
}
@inproceedings{faucris.117113744,
abstract = {Simulation is frequently used to test the performance of embedded systems in different operating scenarios and is usually based on a system model that focuses on the relevant parts, e.g. the response time. The accuracy of the system model is very important to gain minimum divergences to the real world and therefore it has to be calibrated and validated multiple times. The quality of the calibration and validation process depends on the accuracy of the monitored data of a real system. As an example, hardware monitoring requires a specialized device with a built-in clock, which generates timestamps for signals observed at some system interfaces. This solution may provide precise timestamps but can only be applied to systems located in one place like in [1]. The software method generates required time stamps in software, but the accuracy is dependent on the systems' load [2]. © Springer-Verlag London Limited 2007.},
address = {Bukowy Dworek, Poland},
author = {Köker, Kemal and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {Sixth International Workshop on Robot Motion and Control (RoMoCo'07)},
doi = {10.1007/978-1-84628-974-3{\_}41},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2007.tech.IMMD.IMMD7.alowco},
pages = {445-452},
peerreviewed = {Yes},
publisher = {New York; Springer; 1999},
series = {LNCIS},
title = {{A} {Low}-{Cost} {High} {Precision} {Time} {Measurement} {Infrastructure} for {Embedded} {Mobile} {Systems}},
year = {2007}
}
@inproceedings{faucris.116752064,
abstract = {We present a software monitoring infrastructure for distributed web servers for precise measurements of one-way delays of TCP packets to parameterize, validate and verify simulation and state-space based models of the system. A frequency synchronization of the clocks is not sufficient, both frequency and phase (offset) of all clocks have to be in sync to correctly estimate distributions of the involved delays. We present a cost-effective combination of standard methods with own additions and improvements to achieve this goal. The solution we developed is based on using only one GPS receiver in combination with NTP and the PPS-API for the time synchronization of all object systems' clocks with a precision in the range of one microsecond. The timestamping and generation of the event trace is done in a Linux kernel module. In addition, example measurements generated with our infrastructure are presented. © Springer-Verlag Berlin Heidelberg 2003.},
address = {Heidelberg},
author = {Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {Proc. 13th Conf. on Computer Performance Evaluations, Modelling Techniques and Tools},
faupublication = {yes},
isbn = {3-540-40814-2},
note = {UnivIS-Import:2015-04-16:Pub.2003.tech.IMMD.IMMD7.alowco},
pages = {11-28},
publisher = {Springer-verlag},
series = {Lecture Notes in Computer Science},
title = {{A} {Low}-{Cost} {Infrastructure} for {High} {Precision} {High} {Volume} {Performance} {Measurements} of {Web} {Clusters}},
url = {http://www.springerlink.com/link.asp?id=njgh082d155hnqat},
venue = {Urbana, IL, USA},
volume = {2794},
year = {2003}
}
@inproceedings{faucris.116152124,
abstract = {To evaluate the performance of distributed web servers, we have built a cluster-based web server with eleven nodes in our laboratory to conduct measurements of fine granular performance data like individual per-packet delays. We implemented a precise GPS-based time synchronization solution and a software monitoring solution for high-volume measurement of one-way delays in the range of microseconds. The obtained data is used in the input modeling phase to parameterize and calibrate our UML-based simulation models for the web cluster. Additionally, we use the measured performance figures to validate and verify the output of our simulations. Our models help us to scale cluster-based web server systems for a given application to deliver a demanded quality of service level. © 2005 EUROSIS-ETI.},
address = {Ghent, Belgium},
author = {Dietrich, Isabel and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {3rd Int. Industrial Simulation Conference},
date = {2005-06-09/2005-06-11},
faupublication = {yes},
isbn = {90-77381-18-X},
note = {UnivIS-Import:2015-04-16:Pub.2005.tech.IMMD.IMMD7.ameasu},
pages = {88-92},
peerreviewed = {Yes},
publisher = {EUROSIS-ETI},
title = {{A} {Measurement}-{Based} {Simulation} {Model} of a {Web} {Cluster}},
venue = {Berlin, Germany},
year = {2005}
}
@inproceedings{faucris.116383564,
abstract = {We present a simulation model of a Web cluster which includes important aspects of the hardware, operating and communication systems as well as the application layer for realistic performance evaluations. We formulate the model in UML taking into account both architectural and behavioral aspects and apply detailed system-level measurements at low loads for determining parameters. Measured one-way delays are used to characterize the load on the network. We apply advanced input modeling techniques including multi-modal distributions, multiple phases, and Bezier curves for unconventional shapes to represent all quantities. We also propose a new model based on differences between successive delays for modeling the autocorrelations observed during the measurements. Several internal characteristics of the cluster which significantly affect the behavior at higher loads, including buffering, resource contention, and transport layer mechanisms, are modeled in detail in our UML simulation. The model is able to predict the quantiles of the overall delay for HTTP responses of different configurations beyond the laboratory setup. Replacing all distributions with exponential ones with same means leads to significant deviations, demonstrating the need for serious input modeling. © 2009 AACC.},
author = {Dietrich, Isabel and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {Proc. of IEEE EUROCON 2009},
date = {2009-05-18/2009-05-23},
doi = {10.1109/EURCON.2009.5167649},
faupublication = {yes},
keywords = {Discrete event simulation; Input modeling; Measurement based simulation},
note = {UnivIS-Import:2015-04-16:Pub.2009.tech.IMMD.IMMD7.ameasu},
pages = {314-321},
peerreviewed = {Yes},
title = {{A} measurement-based simulation model of a web cluster representing system and application level dynamics},
venue = {St. Petersburg, Russia},
year = {2009}
}
@inproceedings{faucris.248068393,
abstract = {In this work the possibility of a triple generation system for a seasonal pumped thermal energy storage (PTES) is investigated. Residential cooling via a heat pump (HP) is used to load a simple seasonal thermal storage during the summer season and unload it when the requirement of residential heating occurs. While unloading the high temperate, heat is used to power an Organic Rankine Cycle (ORC), whose low temperature condensation heat is then used to heat the building. Therefore, power and heat is stored in the summer and used during the winter. This combines the usage of increased renewable power generation during the summer, especially from photovoltaic and the reduction of fossil or power intensive heating requirements during the winter. Power to power efficiencies of up to 29.2 % with latent and 25.4 % with sensible storages were achieved.
Therefore, in this work we present a method to apply this hybrid model to a valve-regulated lead-acid home-storage system. We outline difficulties arising in the parametrization process, extend the approach by implementing a straightforward control logic and compare the simulation results to an implementation with a solitary equivalent circuit model. Hence, we discuss thoroughly the benefits and challenges utilizing the concept to adequately simulate larger storing units.
In this paper we show how composite states with regions can be used to formalize concurrent streams in usage models. This allows a simplified and reasonable specification of usage models as it hides the state space explosion. We further elaborate on the required steps for an automatic and configurable test case generation from such models. We also provide a suitable analysis method taking advantage of the model structure for computing relevant parameters to guide the test process.},
address = {New York, NY, USA},
author = {Homm, Daniel and Eckert, Jürgen and German, Reinhard},
booktitle = {30th Annual ACM Symposium on Applied Computing},
date = {2015-04-13/2015-04-17},
doi = {10.1145/2695664.2695914},
editor = {ACM New York, NY, USA},
faupublication = {yes},
isbn = {978-1-4503-3196-8},
keywords = {to appear},
note = {UnivIS-Import:2015-04-17:Pub.2015.tech.IMMD.IMMD7.concur},
pages = {1803-1807},
peerreviewed = {Yes},
publisher = {ACM New York, NY, USA},
title = {{Concurrent} {Streams} in {Markov} {Chain} {Usage} {Models} for {Statistical} {Testing} of {Complex} {Systems}},
venue = {Salamanca, Spain},
year = {2015}
}
@inproceedings{faucris.118764844,
abstract = {Multi-valued Decision Diagrams (MDDs) are used in various fields of application. In performance evaluation, a compact representation of the state space of Markovian systems can often be achieved by using MDDs. It is well known that the size of the resulting MDD representation heavily depends on the variable ordering, i.e. the arrangement of the levels within the MDD. Markov models, derived from higher level descriptions of the system, often contain structural information. This information might give hints for an optimized variable ordering a priori, i.e. before the MDD is constructed. Whenever a model is described by constraints-considering the design space of a system, for example-there is a lack of such structural information. This is the reason why the MDD representation often consumes too much memory to be handled efficiently. In order to keep the memory consumption practicable, we have developed two optimization mechanisms. The presented examples demonstrate that efficient MDD representations of the feasible design space can be obtained, even for large unstructured systems. © 2014 Springer International Publishing.},
author = {Berndt, Rüdiger and Bazan, Peter and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {Proceedings of the 17th International GI/ITG Conference on "Measurement, Modelling and Evaluation of Computing Systems and "Dependability and Fault-Tolerance},
doi = {10.1007/978-3-319-05359-2{\_}4},
faupublication = {yes},
isbn = {978-3-319-05359-2},
keywords = {Constraint computation sequence; Design space; Multi-valued decision diagram; Unstructured systems; Variable ordering},
note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.constr},
pages = {43-56},
publisher = {Springer-verlag},
series = {Measurement, Modelling, and Evaluation of Computing Systems and Dependability and Fault Tolerance},
title = {{Construction} {Methods} for {MDD}-based {State} {Space} {Representations} of {Unstructured} {Systems}},
venue = {Bamberg, Germany},
year = {2014}
}
@article{faucris.255344512,
abstract = {The authors regret that there is an error in the published article. The null hypothesis [Formula presented] and the alternative hypothesis [Formula presented] for the hypothesis test in Section V are mistakenly swapped. This does not change the general statement of the paper, but has implications on several equations, result tables and the exact line of argument. This corrigendum introduces the necessary corrections. They could have been given as isolated pieces, but for the sake of clarity the complete enclosing sentence is stated for each correction. Additionally, the opportunity was also used to introduce adjustments for some spelling errors. The authors would like to apologise for any inconvenience caused. ABSTRACT Modern driver assistance systems […] The provided approach therefore allows to design multi-sensor systems such that a specified overall error probability can be met and to give an estimation for the lower bound of the test effort. 1. Introduction […] Especially during the project […] Nevertheless, especially if the development tasks are outsourced to external suppliers, the specification does have to include a reference value for the test amount that has to be carried out by the supplier in order to substantiate a certain level of system reliability. […] To address this, we proposed a new analytical approach to estimate the test effort for multi-sensor-based systems that has to be tested to be able to accept the system with a certain level of statistical significance [6]. […] First, we provide a systematic […] Based on the error probability from the analysis or simulation, a systematic approach is then given to compute a lower bound of the test effort such that with a predefined statistical significance the sensor system shows no errors, this can be used in practice to specify a lower bound for the test effort. […] 2. Problem definition The development and the introduction […] Although it can never be guaranteed that a system is 100% error-free [7], the goal is to test as long as required to be able to accept the system with a predefined level of confidence. […] 4. System description […] 4.2. Event definition […] Based on these systematic event definitions it is possible to derive analytic expressions for the overall error probabilities and in consequence a lower bound of the required test effort. 5. Analytical approach […] The target estimation to be able to accept the system with a certain level of significance results in a hypothesis test with the hypothesis [Formula presented]: the system is too erroneous and the alternative hypothesis [Formula presented]: the system is sufficiently reliable. […] To verify the hypothesis [Formula presented] with a significance level of α, it has to be proven that},
author = {Bock, Florian and Siegl, Sebastian and Bazan, Peter and Buchholz, Peter and German, Reinhard},
doi = {10.1016/j.sysarc.2021.102117},
faupublication = {yes},
journal = {Journal of Systems Architecture},
note = {CRIS-Team Scopus Importer:2021-04-16},
peerreviewed = {Yes},
title = {{Corrigendum}: “{Reliability} and {Test} {Effort} {Analysis} of {Multi}-{Sensor} {Driver} {Assistance} {Systems}” ({Journal} of {Systems} {Architecture} (2018) 85–86 (1–13), ({S1383762117304289}), (10.1016/j.sysarc.2018.01.006))},
volume = {117},
year = {2021}
}
@inproceedings{faucris.107587084,
author = {Awad, Abdalkarim and Bazan, Peter and Kassem, Raed and German, Reinhard},
booktitle = {2016 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe)},
date = {2016-10-09/2016-10-12},
doi = {10.1109/ISGTEurope.2016.7856271},
faupublication = {yes},
isbn = {978-1-5090-3358-4},
note = {UnivIS-Import:2017-01-09:Pub.2016.tech.IMMD.IMMD7.cosimu},
pages = {1-16},
peerreviewed = {Yes},
publisher = {IEEE},
title = {{Co}-{Simulation}-{Based} {Evaluation} of {Volt}-{VAR} {Control}},
venue = {Ljubljana},
year = {2016}
}
@inproceedings{faucris.309679818,
abstract = {Paths with high delay and packet loss are problematic for transport protocols, especially when loss-based congestion control algorithms are used. Our topology of interest is a geostationary satellite path (round trip time approx. 600 ms) with additional packet loss, which could be caused by a lossy wireless local area network. In geostationary satellite networks, Performance Enhancing Proxies split TCP connections to improve performance, but this is not possible in case of encrypted transport protocols (VPNs, QUIC). This motivates the use of local loss recovery, i.e., avoiding packet loss on specific path segments. We briefly discuss related concepts, architectures, and protocols. We then evaluate local loss recovery using a TCP tunnel on the lossy link. By means of a simple emulation setup, we demonstrate that local loss recovery has great performance benefits if CUBIC is used. It is also shown that BBR works well for high-delay and lossy paths even without local loss recovery.},
author = {Deutschmann, Jörg and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {IEEE Workshop on Local and Metropolitan Area Networks},
date = {2023-07-10/2023-07-11},
doi = {10.1109/LANMAN58293.2023.10189417},
faupublication = {yes},
isbn = {9798350346930},
keywords = {congestion control; local loss recovery; performance enhancing proxies},
note = {CRIS-Team Scopus Importer:2023-08-25},
peerreviewed = {unknown},
publisher = {IEEE Computer Society},
title = {{CUBIC} {Local} {Loss} {Recovery} vs. {BBR} on ({Satellite}) {Internet} {Paths}},
venue = {London},
volume = {2023-July},
year = {2023}
}
@inproceedings{faucris.116415684,
abstract = {As a widespread automotive network, CAN (Controller Area Network) buses are deployed in modern cars to fulfill the demands of more than 90 collaborating electronic control devices. For safety critical applications, fast and reliable data transfer is indispensable, since often hard real-time transmission deadlines have to be met to assure a safe operation of the vehicle. Therefore, deterministic performance evaluation methods are inevitable for the validation of systems that must guarantee hard delay bounds and timeliness of information processing. One recent deterministic modeling approach is Network Calculus, which allows to determine worst case transmission times. Based on real-world communication CAN bus data, we generate appropriate modeling elements for the Network Calculus as arrival and service curves that reflect all priorities of CAN traffic. While the highest priority traffic on a CAN bus is known to have real-time properties, the results of this paper provide closed and easily applicable formulas to determine delay bounds of messages on all priority levels.},
address = {Berlin},
author = {Klehmet, Ulrich and Herpel, Thomas and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {Proc. 14th GI/ITG Conference Measurement, Modelling and Evaluation of Computer and Communication Systems},
date = {2008-03-31/2008-04-02},
faupublication = {yes},
isbn = {978-3-8007-3090-2},
note = {UnivIS-Import:2015-04-16:Pub.2008.tech.IMMD.IMMD7.delayb},
pages = {157-171},
peerreviewed = {Yes},
publisher = {VDE Verlag GmbH},
title = {{Delay} {Bounds} for {CAN} {Communication} in {Automotive} {Applications}},
url = {http://www7.informatik.uni-erlangen.de/~ksjh/Pub/pdf/Klehmet-CAN-MMB08.pdf},
venue = {Dortmund, Germany},
year = {2008}
}
@article{faucris.283228558,
abstract = {With real-time communication being a key part of the fourth industrial revolution, the need for Quality of Service (QoS) in industrial networks is gaining increasing importance. Time-Sensitive Networking (TSN) faces this need, for example, by introducing new scheduling mechanisms. The Credit-Based Shaper (CBS) has been introduced to TSN to offer low delays for multiple traffic classes by applying rate limitations. Currently, flows are reserved decentrally in CBS networks using a Stream Reservation Protocol (SRP). In contrast, the new TSN standard IEEE 802.1Qcc allows for a centralized architecture to favor short reconfiguration latencies. However, no online admission control scheme which offers safe delay bounds has been proposed for this central architecture. To close this gap, we propose two models for admission control in TSN networks using CBS. Both models offer deadline-guaranteeing flow allocation, including routing and prioritization of flows, and configure forwarding devices while eliminating packet loss. Our models utilize the mathematical framework of Network Calculus to calculate worst-case flow delays and buffer sizes. We show how our models allow for more reservations than the decentralized standard approach by improved resource utilization. We validate our models both in synthetic and industrial network scenarios. Additionally, we compare the effects and parameters of our two models, providing guidance on when to choose them.
energy sources. In this paper, a continuous and discrete simulation of a pumped thermal energy storage
system are compared with respect to their computational time and accuracy. The stratified heat storage
is modelled using spatial one-dimensional considerations and abstractions. Results show, that the discrete
simulation with fixed time step is about 60 times faster and has neglectable deviation in the resolution of
heat loss computations and accuracy, compared to the continuous System Dynamics model. The conducted
sensitivity analysis shows, that parameters of the storage fluid have little influence on the overall result.
The determining factor regarding losses in the storage and possible savings for users, is the insulation of
the thermal storage. Increasing the number of temperature layers considered in the simulation shows so
called deadlayers, which block the storage if not removed during operation.
},
author = {Huber, Bernd and Sippl, Christoph and Weber, Stefanie and German, Reinhard},
booktitle = {12. Uni-DAS e.V. Workshop Fahrerassistenz und automatisiertes Fahren},
faupublication = {yes},
peerreviewed = {unknown},
title = {{Ein} {Fehlermodell} zur {Manipulation} des {Fahrerverhaltens} in virtuellen {Umgebungen} zum {Testen} automatisierter {Fahrfunktionen}},
venue = {Walting},
year = {2018}
}
@inproceedings{faucris.108495684,
author = {Steber, David and Hümmer, Benedikt and Gürtner, Christian and German, Reinhard and Pruckner, Marco},
booktitle = {15. Symposium EnergieInnovation},
date = {2017-02-14/2018-02-16},
editor = {Udo Bachhiesl},
faupublication = {yes},
peerreviewed = {No},
title = {{Ein} {Regionenmodell} zur {Herleitung} der lokalen elektrischen {Residuallast} und thermischen {Last} in {Deutschland}},
venue = {Graz},
year = {2018}
}
@inproceedings{faucris.114976224,
abstract = {We discuss the need for taking the environmental impact as a primary metric for evaluating the quality of algorithms for Intelligent Transportation Systems (ITS). In many studies, the travel time, or its minimization, has been used to demonstrate the advantages of Inter-Vehicle Communication (IVC) solutions combined with dynamic rerouting. Such evaluations are frequently based on simulation experiments. Recently, much progress has been achieved in this domain by coupling network simulation with road traffic microsimulation. We now investigate the relationship between different metrics used for the evaluation, in particular the environmental impact represented by gas consumption and emissions versus the travel time, highlighting cases where both metrics are conflicting. © 2010 IEEE.},
author = {Sommer, Christoph and Krul, Robert and German, Reinhard and Dreßler, Falko},
booktitle = {Proc. of 71st IEEE Vehicular Technology Conference},
date = {2010-05-16/2010-05-19},
doi = {10.1109/VETECS.2010.5493943},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2010.tech.IMMD.IMMD7.emissi},
pages = {1-5},
title = {{Emissions} vs. {Travel} {Time}: {Simulative} {Evaluation} of the {Environmental} {Impact} of {ITS}},
venue = {Taipei, Taiwan},
year = {2010}
}
@inproceedings{faucris.109153704,
author = {Dreßler, Falko and Awad, Abdalkarim and German, Reinhard and Gerla, Mario},
booktitle = {Proc. of 15th ACM Annual Intern. Conf. on Mobile Computing and Networking},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2009.tech.IMMD.IMMD7.enabli},
pages = {-},
peerreviewed = {unknown},
title = {{Enabling} {Inter}-{Domain} {Routing} in {Virtual} {Coordinate} {Based} {Ad} {Hoc} and {Sensor} {Networks}},
url = {http://www7.informatik.uni-erlangen.de/~akarim/bib/pdf/dressler2009enabling.pdf},
venue = {Beijing, China},
year = {2009}
}
@inproceedings{faucris.278887164,
abstract = {Ultra-reliable and low-latency communication has received significant
research attention. A key part of this evolution are the Time-Sensitive
Networking (TSN) standards, which extend Ethernet with real-time
mechanisms. To guarantee high reliability, the standard IEEE
802.1CB-2017 Frame Replication and Elimination for Reliability enables
redundant communication over disjoint paths. While this mechanism is
essential for time-critical applications, the standard contains some
fundamental limitations that can compromise safety. Although some of
these limitations have been addressed, none of the previous works
provide solutions to these problems. This paper presents solutions to
four main limitations of the IEEE 802.1CB-2017 standard. These are 1)
choosing match versus vector recovery algorithm, 2) defining the length
of the sequence history, 3) setting a timer to reset the sequence
history, and 4) dimensioning the burst size in case of link failures. We
show how these challenges can be solved by using best-and worst-case
path delays of the network. We have performed simulations to illustrate
the impact of the limitations and prove the correctness of our
solutions. Thereby, we demonstrate how our solutions can improve
reliability in TSN networks and propose these methods as guidance for
users of the IEEE 802.1CB standar},
author = {Maile, Lisa and Voitlein, Dominik and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {ICC 2022 - IEEE International Conference on Communications},
date = {2022-05-16/2022-05-20},
doi = {10.1109/ICC45855.2022.9838905},
faupublication = {yes},
isbn = {978-1-5386-8348-4},
keywords = {real-time systems; time-sensitive networking; TSN; network reliability; redundancy},
note = {CRIS-Team Scopus Importer:2022-09-16},
pages = {2706-2712},
peerreviewed = {Yes},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
title = {{Ensuring} {Reliable} and {Predictable} {Behavior} of {IEEE} 802.{1CB} {Frame} {Replication} and {Elimination}},
url = {https://ieeexplore.ieee.org/document/9838905},
venue = {Seoul, South Korea},
volume = {2022-May},
year = {2022}
}
@inproceedings{faucris.315846621,
abstract = {The integration of Software Defined Networking (SDN) to manage Smart Grid Services (SGSs) has raised concerns about its impact on the end-to-end response times in the system. This paper investigates the Quality of Service (QoS) of SGSs in SDN environments using Constraint Satisfaction Problem (CSP) and Network Calculus (NC) techniques. Our studies show that the implementation of SDN contributes to an increase in end-to-end delay times and negatively affects the QoS of SGSs. These results provide insights for designing more efficient and reliable energy systems with SDN environments.},
author = {Alshraa, Abdullah and Maile, Lisa and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {2023 IEEE Green Energy and Smart Systems Conference, IGESSC 2023},
date = {2023-11-13/2023-11-14},
doi = {10.1109/IGESSC59090.2023.10321752},
faupublication = {yes},
keywords = {Constraint Satisfaction Problem; Network Calculus; Quality of Service; Smart Grid Services; Software Defined Networking},
note = {CRIS-Team Scopus Importer:2023-12-22},
peerreviewed = {Yes},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
title = {{Estimating} the {Influence} of {SDN} {Controller} {Intervention} on {Smart} {Grid} {Services}},
venue = {Long Beach, CA},
year = {2023}
}
@inproceedings{faucris.200885118,
abstract = {This paper describes the proof of concept of a blockchain based organization of a local low voltage energy community. The focus of the concept is efficient use of shared resources to minimize external dependence, and not energy trading. A previously proposed control algorithm, which exploits the power dependency of the efficiency of electrical energy storages, is implemented as a smart contract on a private instance of an Ethereum blockchain to coordinate the operation. It is implemented using four connected Raspberry Pis representing the participating households with pre-given electrical load and photovoltaic conversion as well as a battery. Each household runs an Ethereum full node and an interfacing software. Only the energy technology components are simulated, while the blockchain is actually running on the Raspberry Pis in order to mind the full complexity of the technology. %As consensus algorithms both proof-of-work and the more energy-efficient proof-of-authority are compared. The practicability is proved in a test run and positive effects on the efficiency and the self-sufficiency within the community are observed. A first cost-benefit estimate is given and a further research agenda is presented.},
address = {New York, NY, USA},
author = {Schlund, Jonas and Ammon, Lorenz and German, Reinhard},
booktitle = {Proceedings of the Ninth International Conference on Future Energy Systems},
date = {2018-06-12/2018-06-15},
doi = {10.1145/3208903.3208929},
faupublication = {yes},
isbn = {978-1-4503-5767-8},
keywords = {battery efficiency, blockchain, energy community, open-source},
pages = {319--323},
peerreviewed = {unknown},
publisher = {ACM},
series = {e-Energy '18},
title = {{ETHome}: {Open}-source {Blockchain} {Based} {Energy} {Community} {Controller}},
url = {http://doi.acm.org/10.1145/3208903.3208929},
venue = {Karlsruhe, Germany},
year = {2018}
}
@inproceedings{faucris.114043424,
author = {Djanatliev, Anatoli and German, Reinhard},
booktitle = {Program of the 9th IEEE International Conference on Automation Science and Engineering},
date = {2013-08-17/2013-08-21},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2013.tech.IMMD.IMMD7.evalua},
peerreviewed = {Yes},
publisher = {IEEE},
title = {{Evaluating} {Healthcare} {Technologies} by {Hybrid} {Simulation} {Modeling} with {Affected} {Agent} {Crowds}},
url = {https://ras.papercept.net/conferences/conferences/CASE13/program/CASE13{\_}ContentListWeb{\_}4.html},
venue = {Madison, Wisconsin},
year = {2013}
}
@inproceedings{faucris.109793244,
address = {Erlangen, Germany},
author = {Sippl, Christoph and Particke, Florian and German, Reinhard and Djanatliev, Anatoli},
booktitle = {Proceedings of the 5th GI/ITG KuVS Fachgespräch Inter-Vehicle Communication (FG-IVC 2017)}},
date = {2017-04-06/2017-04-07},
editor = {Djanatliev A., Hielscher K.-J., Sommer C., Eckhoff D., and German R.},
faupublication = {yes},
pages = {9--12},
peerreviewed = {Yes},
publisher = {Friedrich-Alexander-Universität Erlangen-Nürnberg, Dept. of Computer Science, Technical Reports, CS-2017-03},
series = {Proceedings},
title = {{Evaluating} {IVC} for {Planning} {Fully} {Automated} {Driving} {Actions} in {Multi}-{Storey} {Car} {Parks}},
url = {https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/8528},
venue = {Erlangen},
year = {2017}
}
@inproceedings{faucris.313939250,
abstract = {
Future networks with well-developed Multi-Access Edge Computing (MEC) resources, where network nodes and distributed service instances can form a dense topology, face the challenge of distributing service data among many nodes. In particular, frequent data changes require an efficient update mechanism. System flexibility and user mobility, e.g, cellu- lar hand-overs, or unpredictable service deployment or node changes, pose additional challenges. In this paper, a method is proposed and evaluated, how network graph-structured data can be distributed and synchronized between many nodes. The design considers especially the challenges of mobile networks with dynamic changes. At the example of a MEC scenario, the method is evaluated using a system-level simulation environment with fifth generation (5G) cellular communication, mobile as well as locally bound nodes, and dynamic service deployment changes. Network and computing resources are represented and shared using a graph. To gain deeper insight into the performance of our model, the time and bandwidth resources required to replicate graph updates to all clients in the 5G network are evaluated. Hereby, the impact of different background network traffic, of information-dependent graph update frequencies, and of the connectivity type can be shown. Finally, by implementing a practical example, the maintenance overhead for synchronizing the graph data to have a local information source is compared to the time required when querying remote information sources.
increasingly installed on distribution feeders. As the digitization
of the grid evolves, collective control paradigms of
distributed assets become possible. The proposed simulator
MiniDES is a generic python framework to model and
interconnect such distributed assets in flexible control
scenarios and modular simulation setups. An integrated
aggregator model allows for versatile queries, different
state-dependent control setups as well as postprocessing
all data obtained during simulation. The framework is
available as open source, portable and offers a template
with household scenarios to build upon. In addition, the
simulator can easily be coupled with the electric power system
simulator OpenDSS in order to include a power flow
analysis. An exemplary case study collectively optimizes the
inverter power of a 20 household community, each with
a rooftop photovoltaic plant and a battery, and achieves
loss savings of 33% as well as considerable increases in
self-sufficiency in comparison to the individual control
case. The according power flow analysis showed that the
increased line losses caused by the increased grid utilization
of the collective control case are negligible compared to
the loss savings. In addition, our simulation shows that
the beneficial community control is economically infeasible
with a conventional price mechanism and that economic
feasibility can be achieved by introducing a more dynamic
price mechanis},
author = {Schlund, Jonas and Reisenweber, Julian and German, Reinhard},
booktitle = {Proceedings of the IEEE Green Energy and Smart Systems Conference 2019},
date = {2019-11-04/2019-11-05},
faupublication = {yes},
keywords = {renewable energy; smart grid; simulation framework; solar power; energy storage; optimization},
peerreviewed = {Yes},
title = {{MiniDES} - {Lightweight} {Python} {Simulation} {Framework} for {Interconnected} {Renewable} {Resources}},
venue = {Long Beach, CA},
year = {2019}
}
@inproceedings{faucris.214888138,
author = {Siegl, Sebastian and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {2010 IEEE International Conference on Vehicular Electronics and Safety, ICVES 2010},
doi = {10.1109/ICVES.2010.5550938},
faupublication = {yes},
isbn = {9781424471249},
keywords = {Modeling; Reliability; Real Time Systems; Software Verification and Validation; Road Vehicle Electronics},
pages = {110-115},
peerreviewed = {Yes},
title = {{Model} driven testing of embedded automotive systems with timed usage models},
venue = {Qingdao},
year = {2010}
}
@inproceedings{faucris.230181989,
abstract = {This paper introduces a novel machine learning approach for performing binary decision-making tasks under uncertainty. Reducing the regression test effort of safety-critical black box systems is a safety-critical task as system failures would remain undetected if corresponding failing test cases are not executed. The uncertainty of potentially undetected system failures persists due to the lack of implementation knowledge of black-box systems. We refer to executing test cases as a costly labeling process due to required special test equipment and testing time. However, we model a binary classifier for selecting test cases. Accordingly, only fault revealing test cases should be selected and thus executed in order to reduce the overall cost of the regression test effort. On the one side, the classifier's specificity has to be maximized. On the other side, the classifier's sensitivity has to meet a specific quality-level since the number of undetected system failures should be limited. We will show in an industrial case study the benefits of our classifier where we reduce the regression test effort of safety-critical systems. The experimental results indicate that our implemented classifier outperforms other machine learning approaches in terms of sensitivity.},
author = {Alagöz, Ibrahim and Hoiss, Thomas and German, Reinhard},
doi = {10.1109/ICMLA.2017.00-38},
faupublication = {yes},
month = {Jan},
pages = {914-919},
peerreviewed = {unknown},
title = {{Modeling} a {Classifier} for {Solving} {Safety}-{Critical} {Binary} {Classification} {Tasks}},
year = {2017}
}
@inproceedings{faucris.115035404,
abstract = {All over the world energy systems are faced with the integration of electricity generated by highly fluctuating decentralized renewable energy sources (RES). The situation in Germany is even more pronounced because of the nuclear phase-out until the end of 2022. Generally, the complexity of energy systems will continue to increase within the next years. Simulation models can help to analyze future energy systems with a high amount of electricity generated by decentralized RES and to study the satisfaction of electricity demand by different energy sources. For instance, the modeling and simulation of the aggregated feed-in of photovoltaic systems and wind energy plants in a high time resolution are very important to investigate the use of conventional power plants in the future. In order to capture fluctuations and typical characteristics of photovoltaic systems and wind energy plants for a region such as the German federal state Bavaria, we developed a hybrid simulation approach using Discrete-Event and System Dynamics techniques. In this paper we describe the modeling and simulation of time series for the aggregated feed-in of photovoltaic systems and wind energy plants in detail. Furthermore, we present simulation results about the covering of electricity demand for different seasons in a weekly and hourly resolution.},
author = {Pruckner, Marco and German, Reinhard},
booktitle = {Proceedings of the 47th Annual Simulation Symposium (ANSS '14)},
date = {2014-04-13/2014-04-16},
faupublication = {yes},
keywords = {Energy system analysis; Energy transition; Hybrid simulation techniques; Modeling of renewable energy},
note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.modeli},
pages = {25-33},
publisher = {The Society for Modeling and Simulation International},
title = {{Modeling} and {Simulation} of {Electricity} {Generated} by {Renewable} {Energy} {Sources} for {Complex} {Energy} {Systems}},
venue = {Tampa (USA)},
year = {2014}
}
@article{faucris.116660324,
abstract = {Higher scalability and availability of Web servers are required as the traffic on the Internet has been increasing dramatically over the last few years. This paper focuses on modeling and simulation of the performance analysis for the test system of a cluster-based Web server consisting of five real servers. Three ways of load balancing are introduced, namely, network address translation, IP tunneling and direct routing. Calculation of packet delay is discussed for each part of the running system according to the transferred data in the system. The input model and the system model to measure and simulate the system performance are derived, and the probability distributions of the delay data are specified for using random inputs in the model according to the Q-Q plot and the cumulative distribution function. After the solution of performance tuning problems is evaluated, the maximum process capability of the system is found and a possible performance bottleneck is analyzed. © 2005 Elsevier B.V. All rights reserved.},
author = {Yang, Jianhua and Jin, Di and Li, Ye and Hielscher, Kai-Steffen and German, Reinhard},
doi = {10.1016/j.simpat.2005.04.004},
faupublication = {yes},
journal = {Simulation Modelling Practice and Theory},
keywords = {Cluster-based Web server; Load balancing; Modeling; Performance; Probability distribution; System simulation},
note = {UnivIS-Import:2015-03-09:Pub.2006.tech.IMMD.IMMD7.modeli},
pages = {188-200},
peerreviewed = {Yes},
title = {{Modeling} and simulation of performance analysis for a cluster-based {Web} server},
volume = {14},
year = {2006}
}
@inproceedings{faucris.111675784,
address = {Savannah, GA, USA},
author = {Pruckner, Marco and Eckhoff, David and German, Reinhard},
booktitle = {Winter Simulation Conference (WSC '14)},
doi = {10.1109/WSC.2014.7019967},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.modeli{\_}2},
pages = {1084-1095},
title = {{Modeling} {Country}-{Scale} {Electricity} {Demand} {Profiles}},
year = {2014}
}
@inproceedings{faucris.212496586,
address = {NEW YORK},
author = {Ballarin, Andrea and German, Reinhard},
booktitle = {2018 7TH INTERNATIONAL CONFERENCE ON RENEWABLE ENERGY RESEARCH AND APPLICATIONS (ICRERA)},
date = {2018-10-14/2018-10-17},
doi = {10.1109/icrera.2018.8566809},
faupublication = {yes},
month = {Jan},
note = {CRIS-Team WoS Importer:2019-03-06},
pages = {505-510},
peerreviewed = {unknown},
publisher = {IEEE},
title = {{Modeling} {Disaggregated} {Electric} {Vehicles} {Availability} on a {Low}-{Voltage} {Distribution} {Network}},
venue = {Paris},
year = {2018}
}
@misc{faucris.240424260,
abstract = {This paper presents two epidemiological models that have been developed in order to study the disease dynamics of the COVID-19 pandemic and exit strategies from the lockdown which has been imposed on many countries world-wide. A strategy is needed such that both the health system is not overloaded letting people die in an uncontrolled way and also such that the majority of people can get back their social contacts as soon as possible. We investigate the potential effects of a combination of measures such as continuation of hygienic constraints after leaving lockdown, isolation of infectious persons, repeated and adaptive short-term contact reductions and also large-scale use of antibody tests in order to know who can be assumed to be immune and participate at public life without constraints. We apply two commonly used modeling approaches: extended SEIR models formulated both as System Dynamics and Agent-Based Simulation, in order to get insight into the disease dynamics of a complete country like Germany and also into more detailed behavior of smaller regions. We confirm the findings of other models that without intervention the consequences of the pandemic can be catastrophic and we extend such findings with effective strategies to overcome the challenge. Based on the modeling assumptions it can be expected that repeated short-term contact reductions will be necessary in the next years to avoid overload of the health system and that on the other side herd immunity can be achieved and antibody tests are an effective way to mitigate the contact reductions for many.Competing Interest StatementThe authors have declared no competing interest.Clinical TrialThis is a simulation studyFunding StatementNo external funding was received for this researchAuthor DeclarationsAll relevant ethical guidelines have been followed; any necessary IRB and/or ethics committee approvals have been obtained and details of the IRB/oversight body are included in the manuscript.YesAll necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived.YesI understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as ClinicalTrials.gov. I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance).Yes I have followed all appropriate research reporting guidelines and uploaded the relevant EQUATOR Network research reporting checklist(s) and other pertinent material as supplementary files, if applicable.YesAll data is given in the paper directly},
author = {German, Reinhard and Djanatliev, Anatoli and Maile, Lisa and Bazan, Peter and Hackstein, Holger},
doi = {10.1101/2020.04.14.20063750},
faupublication = {yes},
peerreviewed = {automatic},
title = {{Modeling} {Exit} {Strategies} from {COVID}-19 {Lockdown} with a {Focus} on {Antibody} {Tests}},
url = {https://www.medrxiv.org/content/early/2020/04/18/2020.04.14.20063750},
year = {2020}
}
@inproceedings{faucris.109168444,
abstract = {UML-based modeling is becoming increasingly popular in many software development projects. One of the key aspects is the possibility to support automatic code generation from UML models while keeping the easy to use modeling abstraction for the software developer. The framework Syntony has been developed to generate discrete-event simulations from standard-compliant UML models in order to support simulation based performance evaluation of systems. In this work, we discuss the extension of Syntony to include automatic code generation in the context of large scale continuous simulations that require the numerical solution of partial differential equations (PDE). We choose variational imaging as an example field, and multigrid as numerical solver. Multigrid algorithms exhibit a fixed sequential structure, where the single steps are problem dependent. Typically, they are implemented in C++, and may depend on special hardware since most of their applications require the solution of large numerical systems and therefore high computational performance. Using Syntony, we provide a modeling framework that can be extended to cover new applications by providing the basic modules and data structures in C++ and modeling the high-level algorithms and classes in UML class and activity diagrams. We evaluate the applicability of our approach in a case study for image denoising. The generated code is a fully working application that computes a denoised output image from a given input image using the methods specified in the UML model. The key benefit lies in the abstraction from low level programming for building complex denoising algorithms. In addition, we show that the code generation and compilation process runs significantly faster than the compilation of the entire framework. We also show that the run-time overhead introduced by the generated code is neglible. © 2010 IEEE.},
author = {Dietrich, Isabel and German, Reinhard and Köstler, Harald and Rüde, Ulrich},
booktitle = {Proc. of 21st Australian Software Engineering Conference},
date = {2010-04-06/2010-04-09},
doi = {10.1109/ASWEC.2010.16},
faupublication = {yes},
keywords = {Multigrid algorithms; Syntony; UML modeling; Variational image processing},
note = {UnivIS-Import:2015-04-16:Pub.2010.tech.IMMD.IMMD7.modeli},
pages = {224-234},
peerreviewed = {Yes},
title = {{Modeling} {Multigrid} {Algorithms} for {Variational} {Imaging}},
venue = {Auckland, New Zealand},
year = {2010}
}
@inproceedings{faucris.227763233,
abstract = {Multi-level traffic scenarios such as highway stack interchanges or parking garages require special consideration when it comes to the analysis of Vehicular Ad-Hoc Networks (VANETs). Near-vertical signal paths and obstructions by floor slabs can have a negative influence on the reception conditions. Nevertheless, state-of-the-art simulators are not able to represent these effects assuming a planar environment only. In this paper, we discuss how the consideration of multi-level communications can be accomplished in packet-based VANET simulation. We create a 3D road network using Digital Surface Models (DSMs) and detect floor obstructions by performing polygon-segment intersection checks. The resulting losses are estimated based on floor attenuation factors. Using the described extensions we simulate a sample scenario featuring a complex stack interchange. The results indicate that a significant proportion of packets is influenced by floors and antenna gains vary widely due to changing elevation angles. As a consequence, the number of reachable neighbors is significantly reduced as compared to the results of a conventional 2D simulation run, demonstrating the need for the consideration of multi-level communications.
Since automotive systems are failure critical, suitable descriptions of the safety of multi-sensor systems are required. Their reliability can be determined either with analytical methods or with simulations. In general, modeling with simulations has no constraints in comparison to analytical models and more potential to extend for a complex system. Nevertheless, simulation models can also lead to long run times when they observe infrequent events. Due to the low sensor error rate, it is almost impossible to simulate these sensor system models in practical run time.
Therefore, the present study aims to check whether the rare event simulation method Repetitive Simulation Trials After Reaching Thresholds (RESTART) algorithm can make the problem feasible.
We employ RESTART simulations to a proven multi-sensor system model, which is on the basis of discrete-time Markov chains and in consideration of dependencies between successive sensor errors and correlation between different sensors. Meanwhile, we compared the results of RESTART simulations with analytical system failure probability. Furthermore, in this study we define a new parameter "acceleration factor" so that we are able to describe the acceleration of RESTART simulations. Based on this factor, we demonstrate the difference between system failure estimation of normal simulation results and related RESTART simulation, which can additionally validate RESTART simulation results.
In conclusion, we can approximately accelerate normal simulations ten to a hundred times and at the same time with acceptable accuracy of simulation results.
Time-Sensitive Networking (TSN) is a set of standards that enables the industry to provide real-time guarantees for time-critical communications with Ethernet hardware. TSN supports various queuing and scheduling mechanisms and allows the integration of multiple traffic types in a single network. Network Calculus (NC) can be used to calculate upper bounds for latencies and buffer sizes within these networks, for example, for safety or real-time traffic. We explain the relevance of NC for TSN-based computer communications and potential areas of application. Different NC analysis approaches have been published to examine different parts of TSN and this paper provides a survey of these publications and presents their main results, dependencies, and differences. We present a consistent presentation of the most important results and suggest an improvement to model the output of sending end-devices. To ease access to the current research status, we introduce a common notation to show how all results depend on each other and also identify common assumptions. Thus, we offer a comprehensive overview of NC for industrial networks and identify possible areas for future work.},
author = {Maile, Lisa and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {2020 Information Communication Technologies Conference (ICTC)},
doi = {10.1109/ICTC49638.2020.9123308},
faupublication = {yes},
keywords = {Delay;Guarantees;Latency;Network Calculus;Time-Sensitive Networking;Worst-Case},
pages = {131-140},
peerreviewed = {Yes},
title = {{Network} {Calculus} {Results} for {TSN}: {An} {Introduction}},
url = {https://ieeexplore.ieee.org/document/9123308},
year = {2020}
}
@inproceedings{faucris.242704764,
abstract = {Different Internet access technologies have both advantages and disadvantages. Two common wire-based standards are Very high speed Digital Subscriber Line (VDSL) and Data Over Cable Service Interface Specification (DOCSIS). The simultaneous use of multiple Internet access links can be achieved with Multipath TCP (MPTCP). This paper presents one-way delay and bulk data transfer measurements of a typical end-user DSL as well as DOCSIS Internet access. In addition, MPTCP is used for bandwidth aggregation of both Internet access links. The results show that the DSL Internet access has a more stable performance than the DOCSIS Internet access. MPTCP can provide bandwidth aggregation unless the link rates are too different. The observed fluctuations indicate that Internet access link models with simple impairment assumptions need to be extended. However, some effects cannot be explained without having access to the operator and backbone infrastructure.},
author = {Ammon, Lorenz and Deutschmann, Jörg and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {2020 43rd International Conference on Telecommunications and Signal Processing, TSP 2020},
date = {2020-07-07/2020-07-09},
doi = {10.1109/TSP49548.2020.9163526},
editor = {Norbert Herencsar},
faupublication = {yes},
isbn = {9781728163765},
keywords = {DOCSIS; Goodput; Hybrid Access; Multipath TCP; Network Measurements; One-Way Delay; Throughput; VDSL},
note = {CRIS-Team Scopus Importer:2020-09-18},
pages = {563-568},
peerreviewed = {unknown},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
title = {{One}-{Way} {Delay} and {Goodput} {Measurements} with a {VDSL}, {DOCSIS}, and {MPTCP} {Internet} {Access}},
venue = {Milan},
year = {2020}
}
@inproceedings{faucris.305827077,
abstract = {With the increased use of software in modern vehicles, the need for updates and data communication rises. While many vehicles are equipped with cellular communication technology, monetary costs are adding up for vehicle manufacturers. Cooperative downloading is a communication scheme, in which many vehicles cooperatively download an update and share the data between them. Through the use of direct communication, only small amounts of data have to be transferred from the internet to the vehicle. Besides using cellular communication for the initial transfer of data, the opportunistic use of WiFi access points has been proposed. To accurately evaluate the usefulness of access points, it is imperative to model their availability, which requires measurement data. We have used an extensive data set and introduced a novel approach to model the reception of access points on a street network. We have shown that even reduced connectivity with the WiFi access points benefits the cooperative downloading scheme, while the deployment of direct communication in the vehicles has larger benefits for the overall update progress. However, if WiFi is used as an additional technology in a cooperative downloading scheme, even its opportunistic availability greatly improves the overall system.
},
address = {Glasgow, Scotland},
author = {Awad, Abdalkarim and Bazan, Peter and German, Reinhard},
booktitle = {Proceedings of the IEEE 81st Vehicular Technology Conference: VTC2015-Spring, First International Workshop on Integrating Communications, Control, Computing Technologies for Smart Grid (ICT4SG)},
doi = {10.1109/VTCSpring.2015.7146032},
faupublication = {yes},
keywords = {privacy; demand response},
note = {UnivIS-Import:2015-04-17:Pub.2015.tech.IMMD.IMMD7.privac},
peerreviewed = {Yes},
title = {{Privacy} {Aware} {Demand} {Response} and {Smart} {Metering}},
year = {2015}
}
@misc{faucris.215816022,
abstract = {Inter-vehicle communication (IVC), the management and control of network
connections among vehicles as well as between vehicles and existing
network infrastructure,
is a maturing research field that is gaining a massive momentum. First
standardization efforts across all layers, by both IEEE and ETSI, have
already borne fruit,
allowing researchers to gain valuable insights into both the strengths
and the shortcomings of current approaches. The U.S. Department of
Transportation decided to
introduce IVC until 2020 using IEEE 802.11p, while in Europe the
decision is not met yet. The investment of European automobile
manufacturers and OEMs into this idea
is not only expressed in successful efforts to reserve dedicated radio
spectrum harmonized across Europe, but is also reflected in numerous
research ventures in
cooperation with academia. However, the gathered knowledge is still
fragmented, making it hard for new players to get into the game and
affording even experienced groups
only a restricted view on this complex field.
Furthermore, new research questions concerning technologies and
services arise in current time.
In particular, a more general view on connected mobility is addressed
where not only vehicles, but also pedestrians, bikers, and bicyclists
are considered in connected contexts.
On this basis new innovations and services can be generated that are
using appropriate technologies and conjointly aim to improve the future
mobility.
},
address = {Essen, Germany},
author = {Bazan, Peter and Luchscheider, Philipp and German, Reinhard},
booktitle = {Proceedings of the 2015 SmartER Europe Conference},
faupublication = {yes},
note = {UnivIS-Import:2015-04-17:Pub.2015.tech.IMMD.IMMD7.rapidm},
peerreviewed = {No},
title = {{Rapid} {Modeling} and {Simulation} of {Hybrid} {Energy} {Networks}},
year = {2015}
}
@inproceedings{faucris.210437796,
author = {German, Reinhard and Bazan, Peter and Awad, Abdalkarim},
booktitle = {7th D-A-CH+ Energy Informatics Conference},
date = {2018-10-11/2018-10-12},
faupublication = {yes},
peerreviewed = {No},
title = {{Rapid} {Prototyping} with i7-{AnyEnergy} and {Detailed} {Co}-{Simulation} with {SGsim}},
venue = {Oldenburg},
year = {2018}
}
@inproceedings{faucris.116718184,
abstract = {Modern cars comprise a multitude of electronic features which are implemented in tens of communicating control units. To connect these in-car embedded systems, the CAN bus offers a sustainable performance, hence it is used as a widespread communication infrastructure, even for safety critical applications. However, CAN media access is priority based and performed competitive and non-preemptive. Thus, assessing the worst case end-to-end delay is inevitable in order to provide safe and efficient operation of functions with hard real-time properties. In this paper, we use the analytical method of Network Calculus to determine guaranteed upper bounds for transmission delays of all CAN priorities. We demonstrate the applicability of our approach by investigating current real-life CAN communication data from the German car manufacturer Audi. © 2008 IEEE.},
address = {Piscataway, N.J.},
author = {Klehmet, Ulrich and Herpel, Thomas and Hielscher, Kai-Steffen and German, Reinhard},
booktitle = {2008 IEEE 67th Vehicular Technology Conference},
date = {2008-05-11/2008-05-14},
doi = {10.1109/VETECS.2008.327},
faupublication = {yes},
isbn = {978-1-4244-1645-5},
note = {UnivIS-Import:2015-04-16:Pub.2008.tech.IMMD.IMMD7.realti},
pages = {3037-3041},
peerreviewed = {Yes},
publisher = {IEEE Conference eXpress Publishing},
title = {{Real}-{Time} {Guarantees} for {CAN} {Traffic}},
url = {http://www7.informatik.uni-erlangen.de/~ksjh/Pub/pdf/VTC2008-draft.pdf},
venue = {Marina Bay, Singapore},
year = {2008}
}
@inproceedings{faucris.210436865,
abstract = {Car rental companies have to operate the fleet of vehicles considering a
cost effective fleet sizing and rebalancing of the vehicles.
Additionally, they have to ensure a good vehicle availability at the
rental stations. We present a simulation model combined with
optimization and queueing network analysis for mobility-on-demand
networks with one-way car sharing. The system is modeled as a closed
queueing network. On the one hand, this allows an estimation of the
vehicle availability; on the other hand, constraints for the
optimization model can be derived from the mathematical equations of the
queuing network model. To optimize the total revenue, the optimization
model considers price incentives for customer trips and cost of empty
trips resulting in a mixed-integer linear programming problem. The
simulation uses the optimization component for an optimized operation of
the mobility-on-demand networks and computes the optimal fleet size,
the cost of empty runs, and the vehicle availabilit},
address = {Piscataway, NJ, USA},
author = {Bazan, Peter and Djanatliev, Anatoli and Lauer, Christoph and Pruckner, Marco and German, Reinhard},
booktitle = {Proceedings of the 2018 Winter Simulation Conference},
date = {2018-12-09/2018-12-12},
doi = {10.1109/WSC.2018.8632428},
editor = {M. Rabe, A. A. Juan, N. Mustafee, A. Skoogh, S. Jain, and B. Johansson},
faupublication = {yes},
isbn = {978-1-5386-6572-5},
pages = {1527-1538},
peerreviewed = {Yes},
publisher = {IEEE Press},
title = {{Rebalancing} and {Fleet} {Sizing} of {Mobility}-on-{Demand} {Networks} with {Combined} {Simulation}, {Optimization} and {Queueing} {Network} {Analysis}},
url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8632428&isnumber=8632166},
venue = {Göteborg},
year = {2018}
}
@article{faucris.203683042,
abstract = {Modern driver assistance systems for self-driving cars often rely on data collected by different sensors to determine the necessary system decisions. To prevent system failures, different validation techniques are used. The development is often split between car manufacturers and suppliers, whereby the requested test effort is one main project acceptance criterion. Already available effort estimation methods are not applicable, because they rely on implementation details that do not exist at early phases or on project experiences or individual expert expectations, which are not reliable enough to be employed as trustworthy source. Therefore, we provide in this paper an analytic approach for the computation of the error probability of a multi-sensor system. Based on this, we can give estimations for the test effort such that with statistical confidence no errors of the sensor system can be expected during the tests. The approach is able to take both the dependencies between successive sensor errors and the correlation between different sensors into account, mainly by using discrete time Markov chains. The provided approach therefore allows to design multi-sensor systems such that a specified overall error probability can be met and to give an estimation for the upper bound of the test effor},
author = {Bock, Florian and Siegl, Sebastian and Bazan, Peter and Buchholz, Peter and German, Reinhard},
doi = {10.1016/j.sysarc.2018.01.006},
faupublication = {yes},
journal = {Journal of Systems Architecture},
keywords = {Discrete-Time Markov Chain; Driver Assistance System; Multi-sensor; Reliability Analysis; Sensor-Based; Test Effort Estimation},
note = {UnivIS-Import:2018-09-05:Pub.2018.tech.IMMD.IMMD7.reliab},
pages = {1-13},
peerreviewed = {Yes},
title = {{Reliability} and test effort analysis of multi-sensor driver assistance systems},
url = {http://www.sciencedirect.com/science/article/pii/S1383762117304289},
volume = {85-86},
year = {2018}
}
@inproceedings{faucris.264025956,
abstract = {Precise environment perception, which consists of multi-sensor systems, ensures the safety of the automated driving functions (ADFs). With the rapid evolution of sensor technologies, sensor data collection errors occur rarely. Nevertheless, accurate interpretation of the sensor data context, such as 3D multi-object tracking, is still full of challenges. Safety of the Intended Functionality (SOTIF) takes concern of the vulnerability of perception systems. The research of quantitative SOTIF analysis is still ongoing. In this paper, we propose a multi-sensor system model to observe both false negative and false positive errors in different field-of-views. Besides, we also extend a proven Markov-based approach, which takes dependencies between successive sensor errors and correlation between two dependent sensors into account, to model three correlated sensors sharing the same region of interest. In the end, we present a numerical example to illustrate the quantitative reliability analysis of a multi-sensor perception system according to SOTIF.
m) with n being the number of tasks and m the number of clock references in the system. We apply the analysis to a real-world scenario from the automotive safety domain to confirm the computational © 2010 IEEE.},
author = {Lauer, Christoph and Hielscher, Kai-Steffen and German, Reinhard and Pollmer, Jens},
booktitle = {Proc. of IEEE Intern. Conf. on Vehicular Electronics and Safety},
date = {2010-07-15/2010-07-17},
doi = {10.1109/ICVES.2010.5550932},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2010.tech.IMMD.IMMD7.schedu{\_}9},
pages = {141-146},
peerreviewed = {Yes},
title = {{Scheduling} {Complex} {Automotive} {Embedded} {Real}-{Time} {Systems}},
venue = {Qingdao, China},
year = {2010}
}
@inproceedings{faucris.276123893,
abstract = {5G is on the rise in both automated driving and industrial automation. So far, these application areas have been considered separately, although the automotive industry can apply them jointly. We examine the future car factory use case Self-Navigating Automotive Production (SNAP), which derives from Automated Valet Parking (AVP). While SNAP benefits from increased flexibility and efficiency, current issues include the lack of AVP standardization and higher system complexity in the factory due to additional cameras, software, as well as worker and machine collaboration. Our concept represents a novel solution for car production and combines both ecosystems.},
author = {Ambrosy, Niklas and Rainer, Julia and Niebisch, Michael and German, Reinhard and Underberg, Lisa},
booktitle = {2022 IEEE 18th International Conference on Factory Communication Systems (WFCS)},
date = {2022-04-27/2022-04-29},
doi = {10.1109/WFCS53837.2022.9779168},
faupublication = {yes},
keywords = {5G; V2X; Automated Valet Parking; Automated Factory Parking; automotive production;},
pages = {1-4},
peerreviewed = {Yes},
title = {{Self}-{Navigating} {Automotive} {Production}: {Using} {5G} for {Automated} {Driving} in {Car} {Assembly}},
venue = {Pavia, Italy},
year = {2022}
}
@inproceedings{faucris.119396464,
abstract = {Decentralized and self-organizing mechanisms present promising approaches to deal with the massive amount of data generated by different components in the smart grid. In this work we present a self-organized approach that is able to take decisions locally and in a distributed way. Our approach distinguishes between an infrastructure level and a decision level. The middleware processes running on the infrastructure level, which provides services such as routing, data filtering and aggregation. The decision level defines an explicitly and declaratively represented dynamic meta model that provides the semantics for the infrastructure level processes, which support interoperability. Additionally, this level runs processes that design, supervise and control agents on the infrastructure level. The levels coupled together through feedback loop that ensures that relevant changes on the infrastructure level are reflected in the decision level and vice versa. The corresponding reflection principles provide the basis for the implementation of the self-organizing mechanisms that govern the overall system. We distinguish two complementary categories of quality metrics for evaluating self-organizing systems. The first category explores the performance of the algorithm with respect to the target application such as delay, path length and success rate. In the context of self-organizing systems, it is important to evaluate additional kind of metrics that do not depend necessarily on the application rather than on selforganizing characteristics of the algorithm. In this paper we focus on the second type, and particularly on self-organizing properties of the algorithms. © 2012 IEEE.},
author = {Awad, Abdalkarim and German, Reinhard},
booktitle = {International Workshop on Technologies and Applications for Smart Cities (I-TASC)},
date = {2012-09-12/2012-09-14},
doi = {10.1109/NGMAST.2012.27},
faupublication = {yes},
keywords = {Evaluation; Self-organization; Services; Smartgrid},
note = {UnivIS-Import:2015-04-16:Pub.2012.tech.IMMD.IMMD7.selfor},
pages = {205-210},
title = {{Self}-{Organizing} {Smart} {Grid} {Services}},
venue = {Paris},
year = {2012}
}
@inproceedings{faucris.115036724,
abstract = {Simulation tools are an essential component of any emerging technology. In this paper we present SGsim, a framework to simulate different applications in the context of smart grid. The framework supports real time simulation. Therefore it is possible to evaluate time-critical applications such as real time monitoring and control. The framework combines two main simulators (1) OMNeT++, a discrete event simulator that is used mainly to simulate data communication systems and (2) OpenDSS, a tool to calculate the power flow in power grids. Moreover, the framework supports smart grid related standards such as IEEE C37.118. This way it is possible to integrate standard smart grid tools such as openPDC. Furthermore, an optimization toolbox is integrated in the simulator in addition to the capability to communicate with other tools such as MATLAB and R. We performed a set of case studies to show the capabilities of the simulator. © 2014 IEEE.},
author = {Awad, Abdalkarim and Bazan, Peter and German, Reinhard},
booktitle = {ENERGYCON 2014: IEEE International Energy Conference},
date = {2014-05-13/2014-05-16},
doi = {10.1109/ENERGYCON.2014.6850507},
faupublication = {yes},
isbn = {978-1-4799-2449-3},
keywords = {Co-simulation; Communication standards; OpenDSS; openPDC; Smart grid},
note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.sgsima},
pages = {730-736},
peerreviewed = {Yes},
publisher = {IEEE Computer Society},
title = {{SGsim}: a {Simulation} {Framework} for {Smart} {Grid} {Applications}},
venue = {Dubrovnik},
year = {2014}
}
@inproceedings{faucris.113239764,
address = {Cham},
author = {Awad, Abdalkarim and Bazan, Peter and German, Reinhard},
booktitle = {Measurement, Modelling and Evaluation of Dependable Computer and Communication Systems. MMB&DFT 2016. Lecture Notes in Computer Science, vol 9629.},
date = {2016-04-04/2016-04-06},
doi = {10.1007/978-3-319-31559-1{\_}2},
editor = {Remke A., Haverkort B.R.},
faupublication = {yes},
isbn = {9783319315584},
keywords = {Co-simulation; Communication system; Conservation voltage reduction; Electricity distribution network; Smart grid},
note = {UnivIS-Import:2016-06-01:Pub.2016.tech.IMMD.IMMD7.sgsimc},
pages = {5-8},
peerreviewed = {Yes},
publisher = {Springer},
title = {{SGsim}: {Co}-{Simulation} {Framework} for {ICT}-{Enabled} {Power} {Distribution} {Grids}},
venue = {Münster},
volume = {9629},
year = {2016}
}
@inproceedings{faucris.119905544,
abstract = {With the global growth of the market for smartphones new business ideas and applications are developed continuously. These often utilize the resources of a mobile device to a considerable extent and reach the limits of these. In this work we focus on the simulation of an on-demand music service on a modern smartphone. Our simulation model includes higher level descriptions of the necessary hardware components' behavior and their energy consumption. Thereby, the detailed simulation of battery plays a key role in the project. With this simulation study we find optimal parameters for the users of the examined application to maximize playback time, improve its battery life and reduce costly data transmissions. © 2014 Springer International Publishing.},
author = {Alagöz, Ibrahim and Löffler, Christoffer and Schneider, Vitali and German, Reinhard},
booktitle = {Proceedings of the 17th International GI/ITG Conference, MMB & DFT 2014},
date = {2014-03-17/2014-03-19},
doi = {10.1007/978-3-319-05359-2{\_}15},
faupublication = {yes},
keywords = {battery lifetime; energy management; kinetic battery model; simulation study; smartphone; streaming music on-demand},
note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.simula},
pages = {207-224},
peerreviewed = {Yes},
publisher = {Springer International Publishing},
title = {{Simulating} the {Energy} {Management} on {Smartphones} {Using} {Hybrid} {Modeling} {Techniques}},
url = {http://link.springer.com/chapter/10.1007/978-3-319-05359-2{\_}15},
venue = {Bamberg, Germany},
year = {2014}
}
@article{faucris.281399133,
abstract = {The storage of electric energy is considered to be a crucial element for grids with a high share of renewable energy generation. Carnot Batteries are a promising technology regarding sector coupling or peak shaving applications. In the domestic sector, current research focuses on an application of Carnot Battery systems in single houses with solar power to improve their self-sufficiency and reduce expenditures. However, due to the non-cellular structure (in contrast to li-ion) economies of scale contribute significantly to the viability of the technology. This is why a joint analysis of entire housing communities is necessary, as focusing only on one house neglects possibilities that arise with larger Carnot Battery systems. The Carnot Battery system is modelled after a pilot plant as a reversible heat pump (20 kW)/organic Rankine cycle (7–13 kW) system coupled with a sensible hot water storage. Operation data from a local energy supplier is used to validate the heat storage component of the simulation model, while the thermal machines are based on simulated and experimental data of the pilot plant. An extensive and comprehensive parameter variation is done to find possible application scenarios of the pilot plant and evaluate its financial viability in a community of varying number of houses. Major findings are, that the possible savings the pilot plant Carnot Battery can achieve in such a community depends on the market conditions considered and that it is not financial under current German market conditions. Varying the feed-in tariff and heat costs showcases the limits of a financial application. Based on current projections for the feed-in tariff, an application for a community of 10–30 houses becomes financial in the near future and saves more than 100 € on electricity costs per house per year, with an amortization period of 14 years depending on interest rates.},
author = {Scharrer, Daniel and Bazan, Peter and Pruckner, Marco and German, Reinhard},
doi = {10.1016/j.energy.2022.125166},
faupublication = {yes},
journal = {Energy},
keywords = {Application; Carnot battery; Heat pump; Organic rankine cycle; Simulation; Validation},
note = {CRIS-Team Scopus Importer:2022-09-09},
peerreviewed = {Yes},
title = {{Simulation} and analysis of a {Carnot} {Battery} consisting of a reversible heat pump/organic {Rankine} cycle for a domestic application in a community with varying number of houses},
volume = {261},
year = {2022}
}
@inproceedings{faucris.259418188,
abstract = {For testing and validation of automated driving functions, simulations are absolutely essential to manage the required test effort. Therefore, the simulation models need to be modeled adequately in order to use the simulation results for virtual validation. As the required accuracy in virtual environment models is not clearly defined, this contribution investigates and quantifies accuracy requirements for the static domain of virtual environment models. By the use of an appropriate sensitivity analysis and a unique metric for the evaluation of simulation results suitable parameters are identified and statistically analyzed for validity and sensitivity assessment for a highway scenario. The results reveal that influences on the creation of virtual environment descriptions for automated driving could be derived and used for defining requirements in the generation and updating of virtual test fields.
opment Plan” is to have one million electric vehicles on the
road by 2020 and up to six millions by 2030. The idea be-
hind the electrification of the transport sector is the reduction
of carbon dioxide (CO2 ) emissions. However, the electric-
ity consumed by electric vehicles have to be generated by re-
newable energy sources or if they are not available by conven-
tionalpowerplants. Hence, ahighnumberofelectricvehicles
means a paradigm shift for the transport and energy sector.
The electrification of road transport has an impact on the en-
ergy system with regard to the electricity generation and CO 2
emissions. In this paper, we show a first approach how the use
of different types (battery, plug-in hybrid, fuel cell) of electric
vehicles can be modeled and integrated in a simulation model
for the German energy system. Moreover, we discuss the im-
pact of electric vehicles on the energy system of Germany.
Our results show that electric vehicles provide high poten-
tial for the reduction of CO2 emissions in the transport sector
compared to vehicles with combustion engines, but they also
cause additional CO2 emissions in the energy sector.},
author = {Pruckner, Marco and German, Reinhard},
booktitle = {Proceedings of the 48th Annual Simulation Symposium},
date = {2016-04-03/2016-04-06},
faupublication = {yes},
keywords = {Modeling and Simulation; Electric Vehicles; CO2 emissions; Load Profiles},
peerreviewed = {unknown},
title = {{The} {Impact} of {Electric} {Vehicles} on the {German} {Energy} {System}},
venue = {Pasadena, CA},
year = {2016}
}
@inproceedings{faucris.111349084,
author = {Käßmeyer, Michael and Berndt, Rüdiger and Bazan, Peter and German, Reinhard},
booktitle = {CARS 2016-4th International Workshop on Critical Automotive Applications: Robustness & Safety},
date = {2016-09-06/2016-09-06},
faupublication = {yes},
note = {UnivIS-Import:2017-12-18:Pub.2016.tech.IMMD.IMMD7.toward{\_}7},
peerreviewed = {Yes},
title = {{Toward} an {MDD}-based {Analysis} of {Stateful} and {Variant}-rich {Automotive} {Functions}},
venue = {Göteborg},
year = {2016}
}
@inproceedings{faucris.110647944,
abstract = {The advantages of combined simulation techniques have been already frequently discussed and are well-covered by the recently published literature. In particular, many case studies have been presented solving similar domain-specific problems by different multi-paradigm simulation approaches. Moreover, a number of papers exist focusing on theoretical and conceptual aspects of hybrid simulation. However, it still remains a challenge to decide, whether combined methods are appropriate in certain situations and how they can be applied. Therefore, domain-specific user guides for multi-paradigm modeling are required combining general concepts and best practices to common steps. In this paper, we particularly outline three major processes targeting to define structured hybrid approaches in domain-specific contexts, and we focus on some practical issues aiming to a sustainable model development. Finally, an example hybrid methodology for problems in healthcare will be presente},
address = {Piscataway, NJ},
author = {Djanatliev, Anatoli and German, Reinhard},
booktitle = {Proceedings of the 2015 Winter Simulation Conference},
date = {2015-12-06/2015-12-09},
doi = {10.1109/WSC.2015.7408281},
editor = {L. Yilmaz, W. K. V. Chan, I. Moon, T. M. K. Roeder, C. Macal, and M. D. Rossetti},
faupublication = {yes},
isbn = {978-1-4673-9743-8},
keywords = {to appear},
note = {UnivIS-Import:2015-10-26:Pub.2015.tech.IMMD.IMMD7.toward},
pages = {1609-1620},
peerreviewed = {Yes},
publisher = {IEEE Press},
title = {{Towards} a {Guide} to {Domain}-{Specific} {Hybrid} {Simulation}},
url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7408281&isnumber=7408148},
venue = {Huntington Beach, CA USA},
year = {2015}
}
@inproceedings{faucris.208996026,
abstract = {Recent topics of interest such as smart cities and autonomous driving
are currently in focus of many research activities. In this context,
simulations are used to evaluate new algorithms, performance of current
technologies, or the impact of upcoming products. In particular, they
allow finding errors and optimizing parameter sets prospectively, prior
to a real-world implementation. Simulation models of many traffic
problems need to handle large-scale scenarios, connect entities from
different domains, and run in feasible time. In order to meet these
challenges, an extendable multi-level traffic simulation approach is
proposed in this paper. We briefly introduce existing traffic simulation
techniques, name upcoming problems, available solution approaches, and
topics regarding the development of our framework. As a first step, we
coupled two different resolution levels of traffic simulation by using
High Level Architecture (HLA) and evaluated this approach in light of
simulation results and simulation performanc},
author = {Gütlein, Moritz and German, Reinhard and Djanatliev, Anatoli},
booktitle = {Proceedings of the 2018 IEEE/ACM 22st International Symposium on Distributed Simulation and Real Time Applications (DS-RT)},
date = {2018-10-15/2018-10-17},
doi = {10.1109/DISTRA.2018.8601004},
editor = {Eva Besada, Óscar Rodríguez Polo, Robson De Grande, José Luis Risco},
faupublication = {yes},
isbn = {978-1-5386-5048-6},
keywords = {Hybrid Simulation, Traffic Simulation, Simulation Framework, High Level Architecture, HLA},
pages = {1-9},
peerreviewed = {Yes},
publisher = {IEEE},
title = {{Towards} a {Hybrid} {Co}-{Simulation} {Framework}: {HLA}-{Based} {Coupling} of {MATSim} and {SUMO}},
url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8601004&isnumber=8600920},
venue = {Madrid},
year = {2018}
}
@inproceedings{faucris.286713074,
abstract = {Due to the immense testing effort, the development and release of
automated driving functions is increasingly dependent on simulations in
addition to real world testing. In order to trust the simulation
results, the deviations have to be quantified compared to tests on real
roads. That is a prerequisite to decide if the required simulation
fidelity is achieved or not. Therefore, several single quantitative and
qualitative metrics are combined in this work to a multivariate scoring
value for scenario-based testing in virtual environments. The approach
focuses on deviations of the driven trajectories as well as the
conducted maneuvers and the criticality in the traffic situations.
However, the built framework for quantifying the gap compared to real
world testing is generally formulated to be extendable for further
features. Furthermore, scoring levels are introduced for classification.
The practicable usage of the defined metric is demonstrated based on a
resimulation of a scenario extracted from real driving data. The results
are classified and thus the deviations are interpretable according to
the used weighting factor},
author = {Stadler, Christoph and German, Reinhard and Djanatliev, Anatoli},
booktitle = {IEEE 25th International Conference on Intelligent Transportation Systems (ITSC)},
doi = {10.1109/ITSC55140.2022.9922082},
faupublication = {yes},
pages = {2508-2513},
peerreviewed = {Yes},
title = {{Towards} a {Multivariate} {Scoring} {Metric} for the {Evaluation} of {Simulation} {Scenarios} in {Automated} {Driving}},
year = {2022}
}
@inproceedings{faucris.285685041,
abstract = {Due to the immense testing effort, the development and release of automated driving functions is increasingly dependent on simulations in addition to real world testing. In order to trust the simulation results, the deviations have to be quantified compared to tests on real roads. That is a prerequisite to decide if the required simulation fidelity is achieved or not. Therefore, several single quantitative and qualitative metrics are combined in this work to a multivariate scoring value for scenario-based testing in virtual environments. The approach focuses on deviations of the driven trajectories as well as the conducted maneuvers and the criticality in the traffic situations. However, the built framework for quantifying the gap compared to real world testing is generally formulated to be extendable for further features. Furthermore, scoring levels are introduced for classification. The practicable usage of the defined metric is demonstrated based on a resimulation of a scenario extracted from real driving data. The results are classified and thus the deviations are interpretable according to the used weighting factors.},
author = {Stadler, Christoph and German, Reinhard and Djanatliev, Anatoli},
booktitle = {IEEE Conference on Intelligent Transportation Systems, Proceedings, ITSC},
date = {2022-10-08/2022-10-12},
doi = {10.1109/ITSC55140.2022.9922082},
faupublication = {yes},
isbn = {9781665468800},
keywords = {automated driving; scenario-based testing; simulation scoring; virtual validation},
note = {CRIS-Team Scopus Importer:2022-11-25},
pages = {2508-2513},
peerreviewed = {unknown},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
title = {{Towards} a {Multivariate} {Scoring} {Metric} for the {Evaluation} of {Simulation} {Scenarios} in {Automated} {Driving}},
venue = {Macau},
volume = {2022-October},
year = {2022}
}
@inproceedings{faucris.114533804,
address = {San Diego, CA, USA},
author = {Deitsch, Anna and Schneider, Vitali and Kane, Jennifer and Dulz, Winfried and German, Reinhard},
booktitle = {Proceedings of the Symposium on Theory of Modeling & Simulation - DEVS Integrative (DEVS '16)},
date = {2016-04-03/2016-04-06},
editor = {Society for Computer Simulation International},
faupublication = {yes},
isbn = {978-1-5108-2321-1},
keywords = {TAS,image processing systems,marte,model-based engineering,sysml,test-driven agile simulation,uml,utp},
peerreviewed = {Yes},
publisher = {Society for Computer Simulation International (SCS)},
title = {{Towards} an {Efficient} {High}-{Level} {Modeling} of {Heterogeneous} {Image} {Processing} {Systems}},
url = {http://dl.acm.org/citation.cfm?id=2975389.2975405},
venue = {Pasadena, CA, USA},
year = {2016}
}
@inproceedings{faucris.113669204,
author = {Pruckner, Marco and Bazan, Peter and German, Reinhard},
booktitle = {INFORMATIK 2012, Smart Grid Wshp.},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2012.tech.IMMD.IMMD7.toward},
pages = {-},
title = {{Towards} a simulation model of the {Bavarian} electrical energy system},
url = {http://www.informatik2012.de/599.html},
venue = {Braunschweig},
year = {2012}
}
@inproceedings{faucris.118765504,
address = {Luxembourg, Luxembourg},
author = {Masalkina, Ekaterina and Eckhoff, David and Berndt, Rüdiger and German, Reinhard},
booktitle = {2nd GI/ITG KuVS Fachgespräch Inter-Vehicle Communication (FG-IVC 2014)},
faupublication = {yes},
keywords = {non-peer},
note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.toward},
pages = {13-16},
peerreviewed = {Yes},
title = {{Towards} the {City}-scale {Simulation} and {Performance} {Assessment} of {Electric} {Vehicles}},
year = {2014}
}
@inproceedings{faucris.215708274,
author = {Dicke, Paul and Steinbacher, Frank and Schricker, Barbara and German, Reinhard},
booktitle = {Advanced Battery Conference 2019},
date = {2019-04-03/2019-04-04},
faupublication = {yes},
peerreviewed = {unknown},
title = {{Universal} {Modelling} {Approach} for {Electrochemical} {Storage} {Units} on {System} {Level}},
venue = {Aachen},
year = {2019}
}
@inproceedings{faucris.121740784,
abstract = {An approach is presented in which both simulation and testing based on UML are combined in one framework to achieve an improved overall quality. System models are specified by UML diagrams, and are then mapped on C++-code and executed in the OMNeT++ network simulation framework. State-space oriented test models are defined independently from this to express requirements by selected system usages. From these test models it is possible to generate test cases and to execute them on the simulation code level. By adding Markov chain usage profiles to the test model it is possible to apply statistical test case generation as well. Altogether this allows to validate both kinds of models systematically and iteratively during the development cycle. The methodology is realized by combining appropriate tools and new software components based on the Eclipse RCP. The approach is also well suited for software engineering because standard modeling languages are used. © 2011 IEE},
address = {Piscataway, NJ},
author = {Djanatliev, Anatoli and Dulz, Winfried and German, Reinhard and Schneider, Vitali},
booktitle = {Proceedings of the 2011 Winter Simulation Conference (WSC '11)},
date = {2011-12-11/2011-12-14},
doi = {10.1109/WSC.2011.6148059},
editor = {S. Jain, R. R. Creasey, J. Himmelspach, K. P. White, and M. Fu},
faupublication = {yes},
isbn = {978-1-4577-2108-3},
keywords = {Test-driven Agile Simulation; Validation and Verification},
note = {UnivIS-Import:2015-04-16:Pub.2011.tech.IMMD.IMMD7.verita},
pages = {3657-3666},
peerreviewed = {Yes},
publisher = {IEEE Press},
title = {{VeriTAS} - {A} {Versatile} {Modeling} {Environment} for {Test}-driven {Agile} {Simulation}},
url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6148059},
venue = {Phoenix (AZ)},
year = {2011}
}
@inproceedings{faucris.123878304,
author = {German, Reinhard and Götz, Kornelia and Grimm, Veronika and Kufner, Annika and Leepa, Claudia and Luther, Matthias and Mehl, Simon and Sigert, Ingo and Steber, David and Veerashekar, Kishan},
booktitle = {OTTI-Konferenz „Zukünftige Stromnetze für Erneuerbare Energien“},
date = {2017-01-31/2017-02-01},
faupublication = {yes},
keywords = {Virtueller Großsspeicher; dezentral; vernetzt; Primärregelleistung},
peerreviewed = {No},
title = {{Virtueller} {Großspeicher} zur {Erbringung} von {Primärregelleistung} – {Pilotprojekt} {SWARM}},
venue = {Berlin},
year = {2017}
}
@misc{faucris.320105568,
abstract = {The study shows that the metropolitan region has economic potential in the product-related value chain. Depending on the scenario, this market sector can become a decisive factor and will create jobs in several fields in the European Metropolitan Region Nuremberg (EMN). However, the simulations show that the generation potential from energy surpluses is not sufficient for significant export. However, the own production of hydrogen in the metropolitan region could cover the own demand, mainly heavy duty vehicles and process heat, and thus could also be an incentive for the own infrastructure development.
However, the simulation clearly shows that a pushed expansion of renewable energies is indispensable and that the storage capacities and concepts planned so far will not be sufficient to buffer the surplus energy peaks and make them available. There is a need for research and action here, both specifically for the EMN and for other regions.
From our point of view, it will be crucial for the EMN that the existing industry in the EMN acquires the competences to develop and produce components, partial and complete systems for hydrogen technology. For this purpose, it is important to provide easy access to this knowledge in the form of a central knowledge center and to ensure close networking of the various players in the product-related value chai}, author = {Pircher, Thomas and Bazan, Peter and Elhaus, Nora and Fellerer, Jonathan and German, Reinhard and Karl, Jürgen and Kolb, Sebastian and Kunz, Thomas and Opferkuch, Frank and Pilz-Lansley, Alexander and Reichenwallner, Simon and Ronge, Karlheinz and Scharrer, Daniel and Schuster, Tassilo and Werner, Bastian}, doi = {10.5281/zenodo.7628146}, faupublication = {yes}, keywords = {hydrogen; european metropolitan area; mobility; sector coupling}, peerreviewed = {automatic}, title = {{Wasserstoff} in der {Metropolregion} {Nürnberg} – {Analyse} der {Kompetenzen}, {Chancen} und {Herausforderungen}}, year = {2023} } @inproceedings{faucris.210413753, author = {Bazan, Peter and Bolch, Gunter and German, Reinhard}, booktitle = {11th Int. Conf. on Analytical and Stochastic Modelling Techniques and Applications}, date = {2004-06-13/2004-06-16}, faupublication = {yes}, pages = {110-115}, peerreviewed = {Yes}, title = {{WinPEPSY}-{QNS} {Performance} {Evaluation} and {Prediction} {System} for {Queueing} {Networks}}, venue = {Magdeburg}, year = {2004} } @inproceedings{faucris.118095384, abstract = {WinPEPSY-QNS is a tool for the easy construction of queueing network models and the evaluation of the performance measures. A graphical and a textual editor can be used for the construction process. The performance measures of the models can be derived by several analysis methods. For product-form networks the mean value analysis (MVA), the method of Jackson, and the method for BCMP networks are implemented. For non-product-form networks the methods of Marie or Chylla can be used. The state space based analysis is provided by a discrete event simulation and solvers for continuous time Markov chains. Some important non-Markovian distributions can be approximated by phase-type distributions. For large Markov chains an efficient solver has been implemented, based on multi-valued decision diagrams and a new approximation method for the stationary analysis.}, address = {Berlin}, author = {Bazan, Peter and Bolch, Gunter and German, Reinhard}, booktitle = {Proc.13th GI/ITG Conference}, date = {2006-03-27/2006-03-29}, faupublication = {yes}, isbn = {3-8007-2945-8}, note = {UnivIS-Import:2015-04-16:Pub.2006.tech.IMMD.IMMD7.winpep}, pages = {465-468}, peerreviewed = {Yes}, publisher = {VDE Verlag GmbH}, title = {{WinPEPSY}-{QNS}-{Performance} {Evaluation} and {Prediction} {System} for {Queueing} {Networks}}, url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=5755404&queryText%3DWinPEPSY-QNS-Performance+Evaluation+and+Prediction+System+for+Queueing+Networks}, venue = {Nürnberg, Germany}, year = {2006} } @inproceedings{faucris.122490544, author = {Bolch, Gunter and German, Reinhard and et al.}, author_hint = {Bazan Peter, Bolch Gunter, German Reinhard}, booktitle = {11th International Conference on Analytical and Stochastical Modelling Techniques and Applictions}, faupublication = {yes}, note = {UnivIS-Import:2015-04-16:Pub.2004.tech.IMMD.IMMD4.winpep}, pages = {110 -115}, peerreviewed = {Yes}, support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'}, title = {{WinPEPSY}-{QNS} {Performance} {Evaluation} and {Prediction} {System} for {Queueing} {Networks}}, venue = {Magdeburg}, year = {2004} } @inproceedings{faucris.117333304, address = {Hamburg, Germany}, author = {Stegner, Christoph and Bogenrieder, Josef and Auer, Sebastian and Luchscheider, Philipp and German, Reinhard and Brabec, Christoph}, booktitle = {Nachhaltige Energieversorgung und Integration von Speichern: Tagungsband zur NEIS 2015}, doi = {10.1007/978-3-658-10958-5}, faupublication = {yes}, isbn = {9783658109585}, note = {UnivIS-Import:2016-06-01:Pub.2015.tech.IMMD.IMMD7.wirtsc}, pages = {34-41}, peerreviewed = {unknown}, title = {{Wirtschaftlichkeitsbetrachtung} von {Haushaltsspeichern} und realdatengestützte {Untersuchung} des elektrischen {Eigenverbrauchs} von {PV}-{Strom}}, year = {2015} } @inproceedings{faucris.114899664, author = {Klehmet, Ulrich and Herpel, Thomas and Hielscher, Kai-Steffen and German, Reinhard}, booktitle = {GI/ITG-Workshop MMBnet: Leistungs-, Zuverlässigkeits- und Verlässlichkeitsbewertung von Kommunikationsnetzen und verteilten Systemen}, faupublication = {yes}, note = {UnivIS-Import:2015-04-16:Pub.2007.tech.IMMD.IMMD7.worstc}, pages = {27-35}, peerreviewed = {Yes}, title = {{Worst} {Case} {Analysis} for {Multiple} {Priorities} in {Bitwise} {Arbitration}}, url = {http://www.informatik.uni-hamburg.de/bib/medoc/B-281-07.pdf}, venue = {Hamburg, Germany}, year = {2007} } @inproceedings{faucris.115038264, address = {Bad Staffelstein, Germany}, author = {Luchscheider, Philipp and Bazan, Peter and German, Reinhard}, booktitle = {29. Symposium Photovoltaische Solarenergie (PVSE 2014)}, date = {2014-03-12/2014-03-14}, faupublication = {yes}, note = {UnivIS-Import:2015-04-16:Pub.2014.tech.IMMD.IMMD7.zeitli}, peerreviewed = {No}, title = {{Zeitlich} hochaufgelöste {Simulation} von {Solarstrahlung} zur {Bewertung} von {Smart} {Grids}}, venue = {Bad Staffelstein}, year = {2014} }