2020 16th International Conference on Distributed Computing in Sensor Systems (DCOSS)
Data gathering and critical events detection are two essential functionalities for Wireless Senso... more Data gathering and critical events detection are two essential functionalities for Wireless Sensor Network (WSN). In this paper, we propose double mobile sinks network architecture, where two mobile sink nodes visit the Cluster Heads (CHs) to collect the captured data, which is very energy effective in terms of energy transmission efficiency and reliable compared with the case of having one static sink node. Moreover, the proposed architecture provides a capable scheme for supporting critical and non-critical data, which assures a timely delivery for any critical event to the remote monitoring and decision-making center with minimal interference to the non-critical data. Our proposed architecture shows a superior performance in terms of packets transmission delay, and requires low buffer occupancy for the CHs nodes when compared to related work in the literature. Finally, the paper provides a preliminary hardware design and implementation for the proposed architecture.
2021 IEEE Jordan International Joint Conference on Electrical Engineering and Information Technology (JEEIT), 2021
Wireless Sensor Networks (WSNs) consist of remote sensors used to monitor and record physical con... more Wireless Sensor Networks (WSNs) consist of remote sensors used to monitor and record physical conditions of the environment and analyze the collected data at a central location for further processing and decision making. WSNs measure environmental conditions such as temperature, pressure, pollution levels, humidity, etc. Long Range (LoRa) wireless technology is a good candidate for providing long-range, low data rate, low energy consumption for WSNs. In this paper, a methodology for selecting the best LoRa parameters, namely, the Spread Factor (SF), Bandwidth (BW), Coding Rate (CR), that achieve the highest bit rate, lowest packet loss, best receiver sensitivity has been proposed using the idea of Radar diagram, which should help researchers and applications' developers choose the best LoRa parameters according to their application requirements. Furthermore, a set of experimental tests has been conducted to study experimentally the LoRa parameters' impact on the transmission quality measured using the packet loss rate (PLR) and the Receiving Signal Strength Indicator (RSSI).
2018 Innovations in Intelligent Systems and Applications (INISTA), 2018
Applying Wireless Sensor Networks to industry settings requests the dynamic reaction of mobile no... more Applying Wireless Sensor Networks to industry settings requests the dynamic reaction of mobile nodes. In critical applications, such as, e-health monitoring of workers, the existence of a suitable protocol to efficiently handle the hand-off procedure is essential for the real-time monitoring of mobile nodes. The main contribution of this paper is a comprehensive performance evaluation considering different single and multiple metric options. The results confirm that the implementation of a fuzzy method to control the triggering procedure outperforms solutions that are based only on single metric approaches.
The 21st century is considered to be “The Century of Cities”. By the end of this century, over 80... more The 21st century is considered to be “The Century of Cities”. By the end of this century, over 80% of the global population is expected to be living in urban areas. To become smart, a city should develop an approach of services that will focus mainly on citizens to be the primary beneficiaries of the services offered by a Smart City. In this work, we present through a survey of 545 participants, the citizens’ perception about the smart city concept and reveal the Greek and Cypriot citizens’ level of knowledge regards to a Smart City’s actions, applications, and elements. The final results of this study revealed several interesting outcomes. Firstly, this study showed that Cypriot citizens seem to know better what a “Smart City” is compared to Greek citizens, secondly, the study revealed that a large number of participants do not believe that any efforts have been made in their city in order to become “smart” and finally, regards to the most important challenges for the development o...
2021 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (ElConRus)
Artificial Intelligence (AI) has been flourishing recently as a viable solution for many applicat... more Artificial Intelligence (AI) has been flourishing recently as a viable solution for many applications and scenarios, including smart irrigation and weather forecasting systems. In these systems, it is crucial to have an accurate prediction for the weather and soil conditions to optimize the irrigation process such that the minimal amount of water is provided. In this paper, a smart irrigation system utilizing Artificial Intelligence (AI) and Long Range Wide Area Network (LoRaWAN) communication link is proposed. The system is composed of sensors that are used to measure soil moisture, atmosphere temperature, and humidity. This information is sent via LoRaWAN communication link to a remote center that gathers, analyzes the captured information, quantifies the appropriate amount of water for irrigation, and then sends the decision back to the irrigation system. Furthermore, the collected information will be stored in the cloud for wider accessibility. This paper describes the technical implementation of the smart irrigation system and focuses on the weather forecasting process, which is performed using the Wind Driven Optimization - Least Square Support Vector Machine (WDO-LS-SVM) algorithm. The obtained results show a better performance when compared to the LS-SVM, which verifies the effectiveness of jointly utilizing the WDO with the LS-SVM.
The remarkable evolution of the IoT raised the need for an efficient way to update the device’s f... more The remarkable evolution of the IoT raised the need for an efficient way to update the device’s firmware. Recently, a new process was released summarizing the steps for firmware updates over the air (FUOTA) on top of the LoRaWAN protocol. The FUOTA process needs to be completed quickly to reduce the systems’ interruption and, at the same time, to update the maximum number of devices with the lowest power consumption. However, as the literature showed, a single gateway cannot optimize the FUOTA procedure and offer the above mentioned goals since various trade-offs arise. In this paper, we conducted extensive experiments via simulation to investigate the impact of multiple gateways during the firmware update process. To achieve that, we extended the FUOTAsim simulation tool to support multiple gateways. The results revealed that several gateways could eliminate the trade-offs that appeared using a single gateway.
Our epoch is continuously disrupted by the rapid technological advances in various scientific dom... more Our epoch is continuously disrupted by the rapid technological advances in various scientific domains that aim to drive forward the Fourth Industrial Revolution. This disruption resulted in the introduction of fields that present advanced ways to train students as well as ways to secure the exchange of data and guarantee the integrity of those data. In this paper, a decentralized application (dApp), namely skillsChain, is introduced that utilizes Blockchain in educational robotics to securely track the development of students’ skills so as to be transferable beyond the confines of the academic world. This work outlines a state-of-the-art architecture in which educational robotics can directly execute transactions on a public ledger when certain requirements are met without the need of educators. In addition, it allows students to safely exchange their skills’ records with third parties. The proposed application was designed and deployed on a public distributed ledger and the final r...
2020 16th International Conference on Distributed Computing in Sensor Systems (DCOSS)
Data gathering and critical events detection are two essential functionalities for Wireless Senso... more Data gathering and critical events detection are two essential functionalities for Wireless Sensor Network (WSN). In this paper, we propose double mobile sinks network architecture, where two mobile sink nodes visit the Cluster Heads (CHs) to collect the captured data, which is very energy effective in terms of energy transmission efficiency and reliable compared with the case of having one static sink node. Moreover, the proposed architecture provides a capable scheme for supporting critical and non-critical data, which assures a timely delivery for any critical event to the remote monitoring and decision-making center with minimal interference to the non-critical data. Our proposed architecture shows a superior performance in terms of packets transmission delay, and requires low buffer occupancy for the CHs nodes when compared to related work in the literature. Finally, the paper provides a preliminary hardware design and implementation for the proposed architecture.
2021 IEEE Jordan International Joint Conference on Electrical Engineering and Information Technology (JEEIT), 2021
Wireless Sensor Networks (WSNs) consist of remote sensors used to monitor and record physical con... more Wireless Sensor Networks (WSNs) consist of remote sensors used to monitor and record physical conditions of the environment and analyze the collected data at a central location for further processing and decision making. WSNs measure environmental conditions such as temperature, pressure, pollution levels, humidity, etc. Long Range (LoRa) wireless technology is a good candidate for providing long-range, low data rate, low energy consumption for WSNs. In this paper, a methodology for selecting the best LoRa parameters, namely, the Spread Factor (SF), Bandwidth (BW), Coding Rate (CR), that achieve the highest bit rate, lowest packet loss, best receiver sensitivity has been proposed using the idea of Radar diagram, which should help researchers and applications' developers choose the best LoRa parameters according to their application requirements. Furthermore, a set of experimental tests has been conducted to study experimentally the LoRa parameters' impact on the transmission quality measured using the packet loss rate (PLR) and the Receiving Signal Strength Indicator (RSSI).
2018 Innovations in Intelligent Systems and Applications (INISTA), 2018
Applying Wireless Sensor Networks to industry settings requests the dynamic reaction of mobile no... more Applying Wireless Sensor Networks to industry settings requests the dynamic reaction of mobile nodes. In critical applications, such as, e-health monitoring of workers, the existence of a suitable protocol to efficiently handle the hand-off procedure is essential for the real-time monitoring of mobile nodes. The main contribution of this paper is a comprehensive performance evaluation considering different single and multiple metric options. The results confirm that the implementation of a fuzzy method to control the triggering procedure outperforms solutions that are based only on single metric approaches.
The 21st century is considered to be “The Century of Cities”. By the end of this century, over 80... more The 21st century is considered to be “The Century of Cities”. By the end of this century, over 80% of the global population is expected to be living in urban areas. To become smart, a city should develop an approach of services that will focus mainly on citizens to be the primary beneficiaries of the services offered by a Smart City. In this work, we present through a survey of 545 participants, the citizens’ perception about the smart city concept and reveal the Greek and Cypriot citizens’ level of knowledge regards to a Smart City’s actions, applications, and elements. The final results of this study revealed several interesting outcomes. Firstly, this study showed that Cypriot citizens seem to know better what a “Smart City” is compared to Greek citizens, secondly, the study revealed that a large number of participants do not believe that any efforts have been made in their city in order to become “smart” and finally, regards to the most important challenges for the development o...
2021 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (ElConRus)
Artificial Intelligence (AI) has been flourishing recently as a viable solution for many applicat... more Artificial Intelligence (AI) has been flourishing recently as a viable solution for many applications and scenarios, including smart irrigation and weather forecasting systems. In these systems, it is crucial to have an accurate prediction for the weather and soil conditions to optimize the irrigation process such that the minimal amount of water is provided. In this paper, a smart irrigation system utilizing Artificial Intelligence (AI) and Long Range Wide Area Network (LoRaWAN) communication link is proposed. The system is composed of sensors that are used to measure soil moisture, atmosphere temperature, and humidity. This information is sent via LoRaWAN communication link to a remote center that gathers, analyzes the captured information, quantifies the appropriate amount of water for irrigation, and then sends the decision back to the irrigation system. Furthermore, the collected information will be stored in the cloud for wider accessibility. This paper describes the technical implementation of the smart irrigation system and focuses on the weather forecasting process, which is performed using the Wind Driven Optimization - Least Square Support Vector Machine (WDO-LS-SVM) algorithm. The obtained results show a better performance when compared to the LS-SVM, which verifies the effectiveness of jointly utilizing the WDO with the LS-SVM.
The remarkable evolution of the IoT raised the need for an efficient way to update the device’s f... more The remarkable evolution of the IoT raised the need for an efficient way to update the device’s firmware. Recently, a new process was released summarizing the steps for firmware updates over the air (FUOTA) on top of the LoRaWAN protocol. The FUOTA process needs to be completed quickly to reduce the systems’ interruption and, at the same time, to update the maximum number of devices with the lowest power consumption. However, as the literature showed, a single gateway cannot optimize the FUOTA procedure and offer the above mentioned goals since various trade-offs arise. In this paper, we conducted extensive experiments via simulation to investigate the impact of multiple gateways during the firmware update process. To achieve that, we extended the FUOTAsim simulation tool to support multiple gateways. The results revealed that several gateways could eliminate the trade-offs that appeared using a single gateway.
Our epoch is continuously disrupted by the rapid technological advances in various scientific dom... more Our epoch is continuously disrupted by the rapid technological advances in various scientific domains that aim to drive forward the Fourth Industrial Revolution. This disruption resulted in the introduction of fields that present advanced ways to train students as well as ways to secure the exchange of data and guarantee the integrity of those data. In this paper, a decentralized application (dApp), namely skillsChain, is introduced that utilizes Blockchain in educational robotics to securely track the development of students’ skills so as to be transferable beyond the confines of the academic world. This work outlines a state-of-the-art architecture in which educational robotics can directly execute transactions on a public ledger when certain requirements are met without the need of educators. In addition, it allows students to safely exchange their skills’ records with third parties. The proposed application was designed and deployed on a public distributed ledger and the final r...
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