C.  Bouras, Gkamas, A., Katsampiris, S., and 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, vol. 10, no. 2, pp. 100-121, 2021.

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

C.  Bouras, Gkamas, A., and 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., and 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., and 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., and 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., and 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., and 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., and 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, pp. 344-353.

E.  Barri, Bouras, C., Gkamas, A., and Katsampiris, S., ?GuideMe: A Complete System for Indoor Orientation and Guidance?, International Journal of Smart Sensor Technologies and Applications (IJSSTA), IGI Global, vol. 1, no. 2, pp. 36-53, 2020.

C.  Bouras, Barri, E., Gkamas, A., Koulouri, C., Michos, E., and 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., and 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., and 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, pp. 195-222.

E.  Barri, Bouras, C., Gkamas, A., Koulouri, C., Michos, E., and 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., and 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, pp. 374-385.