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Future requirements for drastic reduction of CO<sub>2</sub> production and energy consumption will lead to significant changes in the way we see mobility in the years to come. However, the automotive industry has identified significant barriers to the adoption of electric vehicles, including reduced driving range and greatly increased refueling times.… (More)
We present PotatoNet, an outdoor testbed for Wireless Sensor Networks (WSNs). Its primary focus is robustness, reliability and flexibility. PotatoNet is designed to operate without on-site maintenance for extended periods of time. It can withstand heat, dust and rain and has already been tested running outside for several months.
We present an experimental mobile platform which can drop self contained sensor nodes to deploy a Wireless Sensor Network (WSN). At the same time, this network can be used to increase the operation range of the mobile platform.
— Future requirements for drastic reduction of CO2 production and energy consumption will lead to significant changes in the way we see mobility in the years to come. However, the automotive industry has identified significant barriers to the adoption of electric vehicles, including reduced driving range and greatly increased refueling times. Automated cars… (More)
DTN nodes often idly wait for contacts and unnecessarily consume energy during these periods. For solar-powered nodes this means that solar panels and batteries could be much smaller with an efficient energy management, reducing the physical size of these nodes. We present our design of a solar-powered DTN node including a module that handles solar charge… (More)
The fault-tolerant character of WSN protocols and applications that do not assume completely reliable systems legitimize undervolting - a highly efficient energy management technique where the supply voltage is set below the minimum specifications. As has been shown in earlier work, by using thereliable IdealVolting undervolting scheme the lifetime of WSN… (More)
It is a well-known fact that Wireless Sensor Networks (WSNs) that are exposed to real environmental conditions suffer from harsh temperatures. Yet, the temperature does not only have negative impact as the energy efficiency of processing units benefits from higher temperatures. The minimal voltage for correct operation of CMOS circuits is bounded by the… (More)
Mobile robots can be helpful for post disaster management, e.g., to explore hazardous and damaged environments. However , many challenges in various areas have to be solved, e.g., mechanical issues, situation awareness, communication capabilities. We present the interdisciplinary research project Robotic Firefighters (RFF) which addresses some of the IT… (More)
Being able to determine the location of a node is of great advantage in many IoT and WSN applications. For example, in health care scenarios or for autonomous configuration of IoT setups this information can be useful. One of the key challenges in localization is to estimate the distance between nodes. Most present indoor localization systems require… (More)
Wireless sensor networks consisting of a large number of relatively inexpensive nodes are used in a variety of tasks. When being used in difficult to access terrain, or dangerous surroundings, such as often encountered in disaster scenarios , the deployment of a WSN becomes a challenge. In this paper we introduce a novel approach for deploying a WSN: We… (More)