Blar i forfatter Artikler, rapporter og annet (informatikk) "Rais, Issam"

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    • Experiences Building and Deploying Wireless Sensor Nodes for the Arctic Tundra 

      Murphy, Michael J.; Tveito, Øystein; Kleiven, Eivind Flittie; Rais, Issam; Soininen, Eeva M; Bjørndalen, John Markus; Anshus, Otto (Journal article; Tidsskriftartikkel, 2021-08-02)
      The arctic tundra is most sensitive to climate change. The change can be quantified from observations of the fauna, flora and weather conditions. To do observations at sufficient spatial and temporal resolution, ground-based observation nodes with sensors are needed. However, the arctic tundra is resource-limited with regards to energy, data networks, and humans. There are also regulatory and practical ...

    • Quantifying the variability of power and energy consumption for IoT edge nodes 

      Tofaily, Salma; Rais, Issam; Anshus, Otto Johan (Chapter; Bokkapittel, 2023)
      For IoT and edge systems, measuring, predicting and optimizing energy consumption is an open field. It is important to accurately and precisely characterize power and energy consumption of edge nodes, as energy can be a scarce and key resource. However, there are no fine-grain studies that aim at understanding the potential variability of power and energy consumption of edge nodes. Existing research ...

    • Towards Data Dissemination Policy Prediction for Constrained Environments Using Analytics 

      Guegan, Loic; Rais, Issam; Anshus, Otto Johan (Journal article; Tidsskriftartikkel, 2023-09-27)
      <p>In Cyber-Physical Systems (CPS) such as Wireless Sensors Networks (WSN), disseminating data is crucial. Under energy constraints with limited communications capabilities, performing data dissemination is challenging. In such contexts, common data dissemination methods cannot be used. Nodes must rely on device-to-device communications policies to mitigate the impact of communications on the nodes ...

    • Validation of ESDS Using Epidemic-Based Data Dissemination Algorithms 

      Guegan, Loic; Rais, Issam; Anshus, Otto Johan (Journal article; Tidsskriftartikkel, 2023-09-27)
      The study of Distributed Systems (DS) is important as novel solutions in this area impact many sub-fields of Computer Science. Although, studying DS is not an easy task. A common approach is to deploy a test-bed to perform a precise evaluation of the system. This can be costly and time consuming for large scale platforms. Another solution is to perform network simulations, allowing for more flexibility ...

    • Weather-aware Wake-up of Sleeping Cyber-Physical IoT Nodes 

      Kristensen, Steffen Ole Randrup; Bjørndalen, John Markus; Rais, Issam; Ha, Hoai Phuong; Anshus, Otto Johan (Chapter; Bokkapittel, 2023-09-27)
      Cyber-physical IoT nodes located in environments which are resource-constrained and physically hard to access, like the Arctic tundra, must achieve long operational lifetimes from a single battery and report data over data networks. The nodes sleep most of the time, and only wake up to perform mission tasks, including reporting data. However, networks can become unavailable, or have low bandwidth ...