Publikationen von Professorinnen und Professoren der HAW Hamburg
2018 | |
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Adaptive PTFE Wellendichtungen
Tagungsband, 20th ISC, Int. Sealing Conference, Internationale Dichtungstagung Stuttgart
Stuttgart
10.-11. Okt. 2018
Tagungsband, 20th ISC, Int. Sealing Conference, Internationale Dichtungstagung
Stuttgart
, Seite 119-131.
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Transiente Mehrfeldsimulation der Dynamik von PTFE-Wellen-
dichtungen unter der Berücksichtigung von Reibung, Wärme-
entwicklung und Verschleiß
Tagungsband, 20th ISC, Int. Sealing Conference, Internationale Dichtungstagung
Stuttgart
10.-11. Okt. 2018
Tagungsband, 20th ISC, Int. Sealing Conference, Internationale Dichtungstagung
, Seite 681-698.
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HoPP: Robust and Resilient Publish-Subscribe for an Information-Centric Internet of Things
IEEE Local Computer Networks
Chicago, IL
Proc. of the 43rd IEEE Conference on Local Computer Networks (LCN)
Verlag: IEEE Press, Piscataway, NJ, USA
Zusammenfassung: This paper revisits NDN deployment in the IoT with a special focus on the interaction of sensors \em and actuators. Such scenarios require high responsiveness and limited control state at the constrained nodes. We argue that the NDN request-response pattern which prevents data push is vital for IoT networks. We contribute HoP-and-Pull (HoPP), a robust publish-subscribe scheme for typical IoT scenarios that targets IoT networks consisting of hundreds of resource constrained devices at intermittent connectivity. Our approach limits the FIB tables to a minimum and naturally supports mobility, temporary network partitioning, data aggregation and near real-time reactivity. We experimentally evaluate the protocol in a real-world deployment using the IoT-Lab testbed with varying numbers of constrained devices, each interconnected via IEEE 802.15.4 wireless LoWPANs. Implementations are built on CCN-lite with RIOT and support experiments using various single- and multi-hop scenarios. |
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Resilient Machine-to-Machine Communication for an Information-centric Industrial IoT
IEEE Local Computer Networks
Chicago, IL
Proc. of the 43rd Annual IEEE Conference on Local Computer Networks (LCN'18, Demo Session)
Verlag: IEEE Press, Piscataway, NJ, USA
Zusammenfassung: In this demo, we showcase our lightweight Publish-Subscribe scheme HoPP based on the ICN flavour NDN. We deploy a multi-hop low-power and lossy network using constrained IoT devices operated by the RIOT operating system. An intelligent helmet is equipped with an O_2 gas sensor and periodically publishes gas readings to the remote cloud system of our industrial partner. On threshold excitation, the helmet notifies an operator and the network about an alarm situation. We show that all publishings and alarm notifications eventually arrive at the cloud despite of intermittent connectivity and manually induced network disruptions in our multi-hop scenario. A sniffer device provides a live packet trace to a web-based dashboard in order to visualize the topology maintenance and traffic flows. |
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Geschwindigkeits- und Turbulenzkorrelationen von Nachläufen aerodynamischer Profile
Deutscher Luft- und Raumfahrtkongress 2018
Friedrichshafen, Deutschland
4th-6th Sep. 2018
Proceedings of Deutscher Luft- und Raumfahrtkongress 2018
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HoPP: Publish--Subscribe for the Constrained IoT
Information-Centric Networking
Boston, MA
Proc. of 5th ACM Conference on Information-Centric Networking (ICN), Demo Session
ACM
Verlag: ACM Digital Library, New York, NY, USA
Zusammenfassung: In this demo, we showcase our NDN based Publish--Subscribe scheme HoPP in a multi-hop low-power and lossy IoT deployment using constrained devices that operate RIOT. These devices publish temperature sensor readings and subscribe to fan control commands. We manually induce network disruptions to illustrate a seamless publisher and subscriber mobility with HoPP. A web-based dashboard highlights the network resilience and visualizes topology maintenance as well as traffic flows. |
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ICN-LoWPAN: Header Compression for the Constrained IoT
Information-Centric Networking
Boston, MA
Proc. of 5th ACM Conference on Information-Centric Networking (ICN), Poster Session
ACM
Verlag: ACM Digital Library, New York, NY, USA
Zusammenfassung: This paper introduces stateless and stateful header compression to support small MTUs typical for low-power link layers in the Internet of Things. We evaluate our proposals on the multi-hop IoT-Lab testbed and show significant overhead reductions for NDN. |
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NDN, CoAP, and MQTT: A Comparative Measurement Study in the IoT
Information-Centric Networking
Boston, MA
Proc. of 5th ACM Conference on Information-Centric Networking (ICN)
ACM
Verlag: ACM Digital Library, New York, NY, USA
Zusammenfassung: This paper takes a comprehensive view on the protocol stacks that are under debate for a future Internet of Things (IoT). It addresses the holistic question of which solution is beneficial for common IoT use cases. We deploy NDN and the two popular IP-based application protocols, CoAP and MQTT, in its different variants on a large-scale IoT testbed in single- and multi-hop scenarios. We analyze the use cases of scheduled periodic and unscheduled traffic under varying loads. Our findings indicate that (a) NDN admits the most resource-friendly deployment on nodes, and (b) shows superior robustness and resilience in multi-hop scenarios, while (c) the IP protocols operate at less overhead and higher speed in single-hop deployments. Most strikingly we find that NDN-based protocols are in significantly better flow balance than the UDP-based IP protocols and require less corrective actions |
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In situ state of charge and crossover estimation of vanadium redox flow batteries from electrolyte potentials and densities
Lausanne
10.-12.7.2018
The International Flow Battery Forum 2018
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Feedback Linearization of Multilinear Time-Invariant Systems Using Tensor Decomposition Methods
8th International Conference on Simulation and Modeling Methodologies, Technologies and Applications (Simultech)
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