Running Projects

Supervised Theses

Open theses:

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Completed Theses:

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Courses

Publications

• Robert Hartung, Ulf Kulau, Torben Petersen and Lars Wolf: Analysis of Temperature Effects in Heterogeneous Outdoor Wireless Sensor Networks, in 2022 IEEE 19th International Conference on Mobile Ad Hoc and Smart Systems (MASS), pages 148-154, 2022 (9973490, DOI, BibTeX)
• Ulf Kulau, Silas Müller, Sebastian Schildt, Felix Büsching and Lars Wolf: Investigation & Mitigation of the Energy Efficiency Impact of Node Resets in RPL, in Ad Hoc Networks, June 2021 (Kulau:AdHoc-Networks-2021, DOI, BibTeX)
• Thiemo Clausen, Tobias Jura, Nico Jähne-Raden, Marie Cathrine Wolf, Lars Wolf and Ulf Kulau: A Precise, Parallel and Scalable Measurement System for Ballistocardiographic Research, pages 100169, 2021 (kulau_BCG:2020, DOI, BibTeX)
• Ulf Kulau, Thiemo Clausen, Tobias Jura, Nico Jähne-Raden, Marie Wolf and Lars Wolf: A Precise, Parallel and Scalable Measurement System for Ballistocardiographic Research, in The 5th International Conference on Connected Health: Applications, Systems and Engineering Technologies, IEEE/ACM CHASE 2020, Washington, D.C., USA, December 2020 (JRaden:CHASE2020, BibTeX)
• Sven Pullwitt, Robert Hartung, Ulf Kulau and Lars Wolf: Towards Accurate Bit Error Simulation in Wireless Sensor Networks Including Environmental Influences, in Journal of Computer Science and Technology, Vol. 35, No. 4, pages 809, Journal of Computer Science and Technology, 2020 (pullwitt:jcst_cooja, DOI, BibTeX)
• Nico Jähne-Raden, Lars Wolf, Henrike Gütschleg, Thiemo Clausen, Tobias Jura, Stephan Sigg and Ulf Kulau: High-resolution Synchronous Digital Ballistocardiography Setup, in International Conference in Computing in Cardiology 2019, CINC '19, Singapore, September 2019 (JRaden:CINC2019, BibTeX)
• Felix Büsching, Keno Garlichs, Ulf Kulau, Stephan Rottmann and Lars Wolf: Design Considerations of Mission-Oriented Sensor Node Architectures, in Mission-Oriented Sensor Networks and Systems: Art and Science: Volume 1: Foundations, Ammari, Habib M., Cham, pages 11-47, Springer International Publishing, 2019 (Buesching2019, DOI, BibTeX)
• Robert Hartung, Rasmus Antons, Ulf Kulau and Lars Wolf: DUO: Integration of Dependable Undervolting in Operating Systems, in Proceedings of the 7th International Workshop on Energy Harvesting & Energy-Neutral Sensing Systems, ENSsys'19, New York, NY, USA, pages 56-57, ACM, 2019 (Hartung:2019:DID:3362053.3363487, DOI, BibTeX)
• Sven Pullwitt, Robert Hartung, Ulf Kulau and Lars Wolf: Towards Accurate Bit Error Simulation in Wireless Sensor Networks Including Environmental Influences, in 2019 IEEE 16th International Conference on Mobile Ad Hoc and Sensor Systems (MASS), pages 82-90, 2019 (Pullwitt_Hartung_Cooja_BitErrors-2019, BibTeX)
• Nico Jähne-Raden, Ulf Kulau, Michael Marschollek and Klaus-Hendrik Wolf: INBED: A Highly Specialized System for Bed-Exit-Detection and Fall Prevention on a Geriatric Ward, in Sensors, Vol. 19, No. 5, pages 1017, Multidisciplinary Digital Publishing Institute, 2019 (jaehneraden:mdpi2019, BibTeX)
• Robert Hartung, Ulf Kulau, Niels Lichtblau and Lars C. Wolf: A Flexible Software Framework for Real-World Experiments and Temperature-Controlled Testbeds, in Proceedings of the 12th International Workshop on Wireless Network Testbeds, Experimental Evaluation & Characterization, WiNTECH '18, New Delhi, India, pages 30-37, ACM, November 2018 (Hartung:2018:FSF:3267204.3267207, DOI, BibTeX, Slides)
• Ulf Kulau, Daniel Szafranski and Lars Wolf: Effective but Lightweight Online Selftest for Energy-Constrained WSNs, in Thirteenth IEEE Workshop on Practical Issues in Building Sensor Network Applications 2018 (IEEE SenseApp 2018), Chicago, USA, October 2018 (kulau:SenseApp:2018, BibTeX, Slides, Best Paper Award)
• Ulf Kulau: Course: Energy Efficiency in Embedded Systems - A System-Level Perspective for Computer Scientists, in 12th European Workshop on Microelectronics Education (EWME), 2018, IEEE, pages 1-6, September 2018 (kulau:ewme2018, BibTeX)
• Jana Huchtkötter, Andreas Reinhardt and Ulf Kulau: PulseHV: Opportunistic Data Transmissions over High Voltage Pulses for Smart Farming Applications, in Proceedings of the 14th IEEE International Conference on Distributed Computing in Sensor Systems, DCoSS 2018, New York, USA, June 2018 (Kulau:DCOSS2018, BibTeX, Runner-up for best paper)
• Georg von Zengen, Alexander Baumstark, Alexander Willecke, Ulf Kulau and Lars C. Wolf: How Different Transceiver Hardware Effects Concurrent Transmissions in WSNs, in 2018 14th International Conference on Distributed Computing in Sensor Systems (DCOSS), New York, USA, pages 139-146, June 2018 (vonzengen:DCOSS2018, DOI, BibTeX)
• Ngu Nguyen, Nico Jaehne-Raden, Ulf Kulau and Stephan Sigg: Representation Learning for Sensor-based Device Pairing, in Proceedings of PerCom Work in Progress on Pervasive Computing and Communications 2018, PerCom WiP 2018, Athens, Greece, March 2018 (KulauNguyen:PerCom2018, BibTeX)
• Sven Pullwitt, Ulf Kulau, Robert Hartung and Lars C. Wolf: A Feasibility Study on Energy Harvesting from Soil Temperature Differences, in Proceedings of the 7th International Workshop on Real-World Embedded Wireless Systems and Networks, RealWSN'18, Shenzhen, China, pages 1-6, ACM, 2018 (Pullwitt:2018:FSE:3277883.3277886:dup, DOI, BibTeX)
• Robert Hartung, Ulf Kulau and Lars Wolf: Adaptive Wireless Sensor Networks: Robust but Efficient, in Proc. IDEA League Doctoral School on Transiently Powered Computing, Delft, The Netherlands, IDEA League (TU Delft, RWTH Aachen University, ETH Zurich, Chalmers University, Politecnico di Milano), November 2017 (hartung:tpc2017, BibTeX)
• Nico Jähne-Raden, Ulf Kulau, Lars Wolf and Michael Marschollek: Poster Abstract: HeartBeat the Odds - A Novel Digital Ballistocardiographic Sensor System, in Proceedings of the 15th annual international conference on Embedded Networked Sensor Systems, Delft, The Netherlands, ACM, November 2017 (kulau:2017:BallistoPoster, BibTeX)
• Ulf Kulau, Daniel Bräckelmann, Felix Büsching, Sebastian Schildt and Lars Wolf: REAPer - Adaptive Micro-Source Energy-Harvester for Wireless Sensor Nodes, in Twelfth IEEE Workshop on Practical Issues in Building Sensor Network Applications 2017 (IEEE SenseApp 2017), Singapore, October 2017 (kulau:SenseApp:2017, BibTeX, Slides, Runner-up for best paper)
• Stephan Rottmann, Björn Gernert, Jan Käberich, Ulf Kulau and Lars C Wolf: AWuR: An Adaptive Routing Protocol for Energy Efficient Two-Platform Nodes in Wireless DTNs, in 2017 IEEE 14th International Conference on Mobile Ad Hoc and Sensor Systems (MASS), Orlando, USA, pages 293-297, IEEE, October 2017 (rottmann:mass:2017, DOI, BibTeX)
• Ulf Kulau, Silas Müller, Sebastian Schildt, Arthur Martens, Felix Büsching and Lars Wolf: Energy Efficiency Impact of Transient Node Failures when using RPL, in Proceedings of the 18th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks, WoWMoM 2017, Macau, China, June 2017 (Kulau:WOWMOM2017, BibTeX, Slides)
• Ulf Kulau, Stephan Rottmann and Lars Wolf: Demo: Brzzz - A Simplistic but Highly Useful Secondary Channel for WSNs, in Proceedings of the International Conference on Embedded Wireless Systems and Networks, EWSN 2017, Uppsala, Sweden, February 2017 (Kulau:EWSN2017, BibTeX, Slides, Poster, Best Demo Award)
• Laura Marie Feeney, Robert Hartung, Christian Rohner, Ulf Kulau, Lars Wolf and Per Gunningberg: Towards Realistic Lifetime Estimation in Battery-powered IoT Devices, in Proceedings of the 15th ACM Conference on Embedded Network Sensor Systems, SenSys '17, Delft, Netherlands, pages 67:1-67:2, ACM, 2017 (Feeney:2017:TRL:3131672.3136985, DOI, BibTeX)
• Robert Hartung, Ulf Kulau, Björn Gernert, Stephan Rottmann and Lars Wolf: On the Experiences with Testbeds and Applications in Precision Farming, in Proceedings of the First ACM International Workshop on the Engineering of Reliable, Robust, and Secure Embedded Wireless Sensing Systems, FAILSAFE'17, Delft, The Netherlands, pages 54-61, ACM, 2017 (Hartung:Sensys:2017:FAILSAFE, DOI, BibTeX, Slides)
• Nico Jaehne-Raden, Ulf Kulau, Klaus-Hendrik Wolf, Hubertus Meyer zu Schwabedissen and Michael Marschollek: INBED: INEXPENSIVE NODE FOR BED-EXIT DETECTION: A WEARABLE FALL PREVENTION SYSTEM, in Innovation in Aging, Vol. 1, No. suppl_1, pages 1016, 2017 (jaehneraden:kulau:iagg2017, DOI, BibTeX)
• Ulf Kulau, Johannes van Balen, Sebastian Schildt, Felix Büsching and Lars Wolf: Dynamic Sample Rate Adaptation for Long-Term IoT Sensing Applications, in IEEE World Forum on Internet of Things 2016 (WF-IoT), Reston, USA, December 2016 (kulau:wf-iot:2016, BibTeX, Slides)
• Georg von Zengen, Robert Hartung, Ulf Kulau, Felix Büsching and Lars Wolf: Low Cost Temperature Controlled Testbed for WSNs, Augsburg, Germany, September 2016 (FGSN:2016, BibTeX)
• R. Hartung, U. Kulau and L. Wolf: Distributed Energy Measurement in WSNs for Outdoor Applications, in 2016 13th Annual IEEE International Conference on Sensing, Communication, and Networking (SECON), pages 1-9, June 2016 (Hartung:Secon:2016, DOI, BibTeX)
• R. Hartung, U. Kulau and L. Wolf: Demo: PotatoScope - Scalable and Dependable Distributed Energy Measurement for WSNs, in 2016 13th Annual IEEE International Conference on Sensing, Communication, and Networking (SECON), pages 1-3, June 2016 (Hartung:Secon:2016:Demo, DOI, BibTeX)
• Ulf Kulau, Stephan Rottmann, Sebastian Schildt, Johannes van Balen and Lars C Wolf: Undervolting in Real World WSN Applications: A Long-Term Study, in The 12th IEEE International Conference on Distributed Computing in Sensor Systems 2016 (IEEE DCoSS 2016), Washington D.C., USA, May 2016 (kulau:dcoss:2016, BibTeX, Slides)
• Ulf Kulau, Felix Büsching and Lars Wolf: IdealVolting - Reliable Undervolting on Wireless Sensor Nodes, in ACM Transactions on Sensor Networks (TOSN), New York, NY, USA, ACM, January 2016 (kulau:TOSN:2016, BibTeX)
• Ulf Kulau, Tobias Breuer and Lars C Wolf: A Clustering-Based Characteristic Model for Unreliable Sensor Network Data, in IEEE World Forum on Internet of Things 2015 (WF-IoT), Milan, Italy, December 2015 (kulau:wf-iot:2015, BibTeX, Slides)
• Ulf Kulau, Sebastian Schildt, Stephan Rottmann and Lars Wolf: Paint it Black - Increase WSN Energy Efficiency with the Right Housing, in The 6th Workshop on Real World Wireless Sensor Networks, RealWSN15, Seoul, South Korea, November 2015 (kulau:RealWSN, BibTeX, Slides)
• Ulf Kulau, Sebastian Schildt, Stephan Rottmann, Björn Gernert and Lars Wolf: Demo: PotatoNet - Robust Outdoor Testbed for WSNs: Experiment Like on Your Desk. Outside., in Proceedings of the 10th ACM MobiCom Workshop on Challenged Networks, CHANTS '15, Paris, France, pages 59 - 60, ACM, September 2015 (Kulau:chantsDEMO2015, BibTeX)
• Ulf Kulau, Sebastian Schildt, Stephan Rottmann, Björn Gernert and Lars Wolf: PotatoNet - Outdoor WSN Testbed for Smart Farming Applications, in Proceedings of the 14th GI/ITG KuVS Fachgespräch Drahtlose Sensornetze, FGSN15, Erlangen, Germany, September 2015 (kulau:FGSN15, BibTeX, Slides)
• Ulf Kulau, Felix Büsching and Lars C Wolf: Undervolting in WSNs: Theory and Practice, in Internet of Things Journal, IEEE, Vol. 2, No. 3, pages 190-198, June 2015 (kulau:iot:2014, DOI, BibTeX)
• Ulf Kulau, Stephan Friedrichs and Lars Wolf: Demo: Voltage Scheduling of Peripheral Components on Wireless Sensor Nodes, in Proceedings of the 12th European Conference on Wireless Sensor Networks, EWSN 2015, Porto, Portugal, pages 33-36, February 2015 (Kulau:EWSN2015, BibTeX, Slides, Poster)
• Felix Büsching, Keno Garlichs, Johannes van Balen, Yannic Schröder, Kai Homeier, Wolf-Bastian Pöttner Ulf Kulau, Stephan Rottmann, Sebastian Schildt, Georg von Zengen and Lars Wolf: Quadrotor-based DT-WSNs for Disaster Recovery, in Proceedings of the 13th GI/ITG KuVS Fachgespräch Drahtlose Sensornetze, FGSN14, Potsdam, Germany, September 2014 (buesching:FGSN14, BibTeX)
• Ulf Kulau, Sebastian Schildt, Georg von Zengen, Stephan Rottmann and Lars Wolf: Ballistic Deployment of WSN Nodes using Model Rockets, in Proceedings of the 6th Extreme Conference of Communication (ExtremeCom 2014), Galapagos Islands, Ecuador, August 2014 (Kulau:extremecom:2014, BibTeX, Slides)
• Stephan Friedrichs, Ulf Kulau and Lars C Wolf: Energy-Efficient Voltage Scheduling of Peripheral Components on Wireless Sensor Nodes, in To appear in: ICC'14 - Workshop on Energy Efficiency in Wireless Networks & Wireless Networks for Energy Efficiency (ICC'14 WS - E2Nets), Sydney, Australia, June 2014 (fkw-eevsopcowsn-14, BibTeX, Slides)
• Ulf Kulau, Felix Büsching and Lars C Wolf: Undervolting in WSNs - A Feasibility Analysis, in To appear in: IEEE World Forum on Internet of Things 2014 (WF-IoT), Seoul, South Korea, March 2014 (kulau:wf-iot:2014, BibTeX, Slides)
• Ulf Kulau, Felix Büsching and Lars C Wolf: A Node's Life: Increasing WSN Lifetime by Dynamic Voltage Scaling, in The 9th IEEE International Conference on Distributed Computing in Sensor Systems 2013 (IEEE DCoSS 2013), Cambridge, USA, May 2013 (Kula1305:Nodes, BibTeX, Slides)
• Ulf Kulau, Felix Büsching, Wolf-Bastian Pöttner and Lars C Wolf: Demo: A Node's Life - Increasing WSN Lifetime by Dynamic Voltage Scaling, in The 9th IEEE International Conference on Distributed Computing in Sensor Systems 2013 (IEEE DCoSS 2013), Cambridge, USA, May 2013 (Kula1405:Nodes, BibTeX, Poster)
• Felix Büsching, Ulf Kulau and Lars Wolf: Architecture and Evaluation of INGA - An Inexpensive Node for General Applications, in Sensors, 2012 IEEE, Taipei, Taiwan, pages 842-845, IEEE, October 2012 (Buesching:Sensors:2012, DOI, BibTeX, Slides)
• Felix Büsching, Ulf Kulau, Matthias Gietzelt and Lars Wolf: Comparison and validation of capacitive accelerometers for health care applications, in Computer Methods and Programs in Biomedicine, Vol. 106, No. 2, pages 79 - 88, 2012 (buesching:CMPB:2011, DOI, BibTeX)
• Ulf Kulau, Felix Büsching, Wolf-Bastian Pöttner and Lars Wolf: INGA - Architektur eines universell einsetzbaren Sensorknotens, in Proceedings of the 10th GI/ITG KuVS Fachgespräch Drahtlose Sensornetze, FGSN11, Paderborn, Germany, September 2011 (buesching:FGSN11, BibTeX, Slides)
• Felix Büsching, Ulf Kulau and Lars Wolf: Demo: INGA - An Inexpensive Node for General Applications, in Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems, SenSys '11, Seattle, WA, USA, ACM, 2011 (buesching:Sensys11, BibTeX, Poster)

InBeb Technology

The INBED is a tiny wearable sensor node which was developed to support care attendants. The inexpensive system can help to detect events like movement, rising or falls. Certain events can be broadcasted immediately to prevent falls in advance. Further information can be found here.

Radio Report: 'Frühwarnsystem für Senioren - Pflaster warnt vor Sturzgefahr' .

Promotion Video.

Misc

Long-term temperature measurement of WSN housigs

PotatoNet Webcam

PotatoBox - Low-cost temperature chamber

Longterm study of Undervolting in real WSN