C.  Bouras, Gkamas, A., Katsampiris, S., ??? Papachristos, N., ?????., ?A Comparative Study of Machine Learning Models for Spreading Factor Selection in LoRa Networks?, Journal of Wireless Networks and Broadband Technologies (IJWNBT), IGI Global, ?. 10, ??. 2, ?? 100-121, 2021.

C.  Bouras, Gkamas, A., ??? Katsampiris, S., ?????., ?Energy efficient mechanism for LoRa networks?, Internet of Things: Engineering Cyber Physical Human Systems, Elsevier Science, 2021, ?. 13, ?? 1-13, 2021.

C.  Bouras, Gkamas, A., ??? Katsampiris, S., ?????., ?Energy Efficient Mechanism over LoRa for Search and Reuse operations?, in The 2021 IEEE International Symposium on Networks, Computers and Communications (ISNCC 2021): Smart Cities and the Internet of Everything, October 31 ? November 2, Dubai - UAE, 2021.

C.  Bouras, Gkamas, A., ??? Katsampiris, S., ?????., ?Exploring the energy efficiency for Search and Rescue operations over LoRa?, in 11th IFIP International Conference on New Technologies, Mobility and Security (NTMS' 2021), April 19 - 21, 2021, Paris, France , 2021.

E.  Barri, Bouras, C., Gkamas, A., ??? Katsampiris, S., ?????., ?GuideMe: A system for Indoor Orientation and Guidance?, in The Seventh International Conference on Smart Portable, Wearable, Implantable and Disability - oriented Devices and Systems (SPWID 2021), May 30 - June 3, 2021, Valencia, Spain , 2021.

E.  Barri, Bouras, C., Gkamas, A., ??? Katsampiris, S., ?????., ?GuideMe: A system for Indoor Orientation and Guidance?, in The Seventh International Conference on Smart Portable, Wearable, Implantable and Disability - oriented Devices and Systems (SPWID 2021), May 30 - June 3, 2021, Valencia, Spain, 2021.

C.  Bouras, Gkamas, A., ??? Katsampiris, S., ?????., ?HCI preliminary study and implementation for a LoRa based SAR system?, in The 12th International Conference on Sensor Device Technologies and Applications (SENSORDEVICES 2021), November 14 ? 18, 2021, Athens, Greece , 2021.

C.  Bouras, Gkamas, A., Katsampiris, S., ??? Papachristos, N., ?????., ?Spreading Factor Analysis for LoRa networks: A supervised learning approach?, in 9th World Conference on Information Systems and Technologies (WorldCIST?21), March 30 - 31 and 1-2 April 1 - 2, 2021, Azores, Portugal, 2021.

C.  Bouras, Gkamas, A., Katsampiris, S., ??? Papachristos, N., ?????., ?Spreading Factor Selection Mechanism for Transmission over LoRa Networks?, in 28th International Conference on Telecommunications (ICT 2021), June 1 - 3, 2021, London, UK , 2021, ?? 344-353.

E.  Barri, Bouras, C., Gkamas, A., ??? Katsampiris, S., ?????., ?GuideMe: A Complete System for Indoor Orientation and Guidance?, International Journal of Smart Sensor Technologies and Applications (IJSSTA), IGI Global, ?. 1, ??. 2, ?? 36-53, 2020.

C.  Bouras, Barri, E., Gkamas, A., Koulouri, C., Michos, E., ??? Katsampiris, S., ?????., ?GuideMe: A Networked Application for Indoor Orientation and Guidance?, in The Sixteenth International Conference on Networking and Services (ICNS 2020), September 27, 2020 - October 01, 2020, Lisbon, Portugal , 2020.

E.  Barri, Bouras, C., Gkamas, A., Koulouri, C., Michos, E., ??? Katsampiris, S., ?????., ?GuideMe: A Networked Application for Indoor Orientation and Guidance?, in The Sixteenth International Conference on Networking and Services (ICNS 2020), September 27, 2020 - October 01, 2020 , Lisbon, Portugal (to appear), 2020.

C.  Bouras, Gkamas, A., Katsampiris, S., ??? Papachristos, N., ?????., ?Search and Rescue System Based on NB-IoT Wearable Device?, in Principles and Applications of Narrowband Internet of Things (NBIoT), IGI Global, 2020, ?? 195-222.

E.  Barri, Bouras, C., Gkamas, A., Koulouri, C., Michos, E., ??? Katsampiris, S., ?????., ?Text to Speech through Bluetooth for People with Special Needs Navigation?, in The Sixteenth International Conference on Networking and Services (ICNS 2020), September 27, 2020 - October 01, 2020 , Lisbon, Portugal, 2020.

C.  Bouras, Gkamas, A., Katsampiris, S., ??? Kokkinos, V., ?????., ?Comparison of LoRa Simulation Environments?, in The 14th International Conference on Broad - Band Wireless Computing, Communication and Applications (BWCCA - 2019), Antwerp, Belgium, 2019, ?? 374-385.