A5063611169- Energy Harvesting in Wireless Networks
- Antenna Design and Analysis
- Chaos control and synchronization
- Wireless Power Transfer Systems
- Advanced MIMO Systems Optimization
- Nonlinear Dynamics and Pattern Formation
- Innovative Energy Harvesting Technologies
- stochastic dynamics and bifurcation
- IoT Networks and Protocols
- IoT-based Smart Home Systems
- Advanced Antenna and Metasurface Technologies
- Music and Audio Processing
- Antenna Design and Optimization
- Quantum chaos and dynamical systems
- Music Technology and Sound Studies
- Diverse Cultural Media Analysis
- Advanced Wireless Communication Technologies
- Evolutionary Algorithms and Applications
- Technology Adoption and User Behaviour
- Dielectric materials and actuators
- Chaos-based Image/Signal Encryption
- Full-Duplex Wireless Communications
- Fermentation and Sensory Analysis
- Engineering and Technology Innovations
- Neural Networks and Applications
International Hellenic University
2023-2024
Aristotle University of Thessaloniki
2007-2024
University of Nicosia
2021
Marmara University
2004
Agriculture 4.0, as the future of farming technology, includes several key enabling technologies towards sustainable agriculture. The use state-of-the-art technologies, such Internet Things, transform traditional cultivation practices, like irrigation, to modern solutions precision In this paper, we present in detail subsystems and architecture an intelligent irrigation system for agriculture, AREThOU5A IoT platform. We describe operation node that is utilized Moreover, apply radiofrequency...
Radio frequency energy harvesting has attracted considerable interest as a technique of enabling self-powered wireless networks. This faces several challenges, such the receiving and rectifying modules rectenna system. Multiband antennas provide comparative advantages against goal maximizing amount harvesting. In this work, we present multiband microstrip patch antenna with three slits operating in LoRaWAN (Long Range Wide Area Network) cellular (GSM-1800 UMTS) communication bands. A...
Purpose Adding to competitive dynamics and sustainability literature, this paper aims examine the implementation of environmental protection initiatives within European fast-fashion clothing industry from perspectives Generation X Y consumers. The study primarily investigates whether consumers’ level consciousness impacts their purchase decisions consumption behaviour consequent strategic competitiveness effects on businesses. Design/methodology/approach methodological approach relied...
The discipline of Deep Learning has been recognized for its strong computational tools, which have extensively used in data and signal processing, with innumerable promising results. Among the many commercial applications Learning, Music Signal Processing received an increasing amount attention over last decade. This work reviews most recent developments processing. Two main that are discussed Information Retrieval, spans a plethora applications, Generation, can fit range musical styles....
As the energy crisis is leading to shortages and constant increases in prices, green renewable sources are trending as a viable solution this problem. One of most rapidly expanding methods RF (RadioFrequency) harvesting, its corresponding technologies constantly progressing, due introduction 5G high-speed telecommunications. The usual system for harvesting called rectenna, one main components an antenna, responsible collecting ambient energy. In paper, optimization process ultra-wideband...
The exigency for continuous use of electrical devices has created greater demands electricity along with more efficient transmission techniques. Energy from natural resources can be solar, thermal, vibration, friction, or Radio Frequencies (RF) signals. This state-of-the-art work provides a summary RF energy harvesting techniques and used as guide the manufacture scavenging modules. Frequency Harvesting (EH) technique contributes to development autonomous sensors. A rectenna system includes...
Swarm Intelligence (SI) Algorithms imitate the collective behavior of various swarms or groups in nature. In this work, three representative examples SI algorithms have been selected and thoroughly described, namely Grey Wolf Optimizer (GWO), Whale Optimization Algorithm (WOA), Salp (SSA). Firstly, are reviewed literature, specifically for optimization problems antenna design. Secondly, a comparative study is performed against widely known test functions. Thirdly, such applied to synthesis...
A triple-band single-layer rectenna for outdoor RF energy applications is introduced in this paper. The proposed operates the frequency bands of LoRa, GSM-1800, and UMTS-2100 networks. To obtain a operation, modified E-shaped patch antenna used. receiving module (antenna) system optimized terms its reflection coefficient to match RF-to-DC rectifier. final geometry derived by application Moth Search Algorithm commercial electromagnetic solver. impedance matching network obtained based on...
Water scarcity and desertification are considered to be among the greatest challenges of humanity over coming decades. Worldwide, agriculture accounts 69% total water usage, while industry for 23%, urban use 8%. In Greece, a rural development model poor farming practices have resulted in an overwhelming 83% consumption directed uses. Furthermore, excessive combined with existing pesticides fertilizers usage levels creates exponential problems cycle Greece. Taking into account above...
Radio-frequency (RF) energy harvesting (EH) is emerging as a reliable and constantly available free source. The primary factor determining whether this can be utilized how efficiently it collected. In work, an RF EH system presented. More particularly, we designed dual-band to DC rectifier circuit at sub-6 GHz in the 5G bands, able supply low-power sensors microcontrollers used agriculture, military, or health services. operates 3.5 5 cellular network’s frequency band FR1. Numerical results...
The need for electronic devices usage has risen significantly over the years. This in turn generated greater demands electricity and addition green energy sources. These include Radio-Frequency (RF) harvesting. In this concept we design a rectifier circuit RF to DC conversion suitable operation at sub-6 GHz 5G bands. Such can be used supply low-power devices. proposed works frequency band FR1 of cellular network more specifically 3.5 GHz. most important problem harvesters is low system...
In this work, a novel quad-band rectifier circuit is introduced for RF energy harvesting and Internet of Things (IoT) applications. The proposed operates in the Wi-Fi frequency band can supply low-power sensors systems used IoT services. at 2.4, 3.5, 5, 5.8 GHz. RF-to-DC designed based on Delon theory Greinacher topology an RT/Duroid 5880 substrate. results show that our harvest from environment, providing maximum power conversion efficiency (PCE) greater than 81% when output load 0.511 kΩ...
Energy consumption is a key factor in environmental sustainability and the economy. In next 30 years, global food production will need to increase rapidly and, this context, refrigeration play pivotal role. SmartFridge project, several aspects of operating cycle equipment are explored. reduction one most important use cases project. For reason, work provides an assessment three scenarios refrigerator model, which indoor temperature moisture, as well interior temperature, explored quantify...
Radio Frequency (RF) energy harvesting is emerging as a potentially reliable method to replace the costly and, difficult maintain, source of low-power wireless sensors networks. In this paper, dual-band RF-to-DC rectifier, that operates at LoRaWAN and GSM-900 cellular communication frequency bands, presented. The system composed an impedance matching circuit, converts ambient RF into DC voltage able feed low power devices, output load. proposed resonates two different frequencies 866 MHz 937...
This paper describes a proposed method for optimizing the parameters of Model Reference Adaptive Control (MRAC) system. The MRAC system uses reference model to control plant with unknown dynamics and continuously updates its improve accuracy. requires an adjustment parameter γ, which participates in feedback but cannot be adjusted real time through trial error. optimization techniques adjust γ time, specifically at start process, when maximum deviation from is observed. technique varies...
Radio Frequency (RF) energy harvesting has been emerged as a potentially reliable method to replace the costly and difficult maintain source of low-power wireless sensor networks. A plethora dual-band rectifier designs proposed in literature operating various frequency bands. In this paper, triple-band RF-to-DC that operates bands LoRaWAN, GSM-900, WiFi 2.4 GHz is presented. The system composed an impedance-matching circuit, rectifier, converts ambient RF into DC voltage able feed devices,...
Frequency Selective Surfaces (FSSs) have become increasingly popular during the last years due to their combined characteristics, which meet, in general, requirements of next-generation wireless communication networks. In this work, a cross-platform design framework for FSS structures is presented and evaluated by utilizing recently introduced evolutionary optimization algorithm, namely, Multi-Variant Differential Evolution (MVDE). To best authors knowledge, first time that MVDE algorithm...
In developed countries, companies active in the food retail sector consume about 20% of total power required for cooling and are therefore ranked among them with largest energy footprint after industries. For this reason, refrigeration equipment manufacturers increasingly focusing on methods that will reduce consumption its efficient operation. The solutions currently implemented mainly focus interventions development phase freezer units (better insulation, variable frequency compressors,...
Radio Frequency Energy Harvesting (RF EH) is an alternative, yet well-promising technique to deliver power in electronic circuits of wireless sensor networks that require small amounts energy. The design the receiving module (antenna) RF EH systems a demanding and, most cases, complex task. As result, optimization method often required. In this paper, we apply Salp Swarm Algorithm and optimize (dual-band modified E-shaped antenna) for systems. proposed antenna operates frequency bands...
As the power requirements of electronic systems in wireless sensor networks are progressively reducing, radio frequency (RF) energy harvesting (EH) technique is becoming increasingly interesting during last years. In this paper, we design and optimize a modified printed bow-tie antenna, operating band 5G NR mobile communication networks. For optimization process, have selected Monarch Butterfly Algorithm that combines swarm intelligence evolutionary characteristics. Computed results exhibit...
The advent of the Internet Things has allowed re-usability established techniques combined with emerging technologies. In TERMINET project, several key-enabling technologies in an IoT ecosystem are explored. smart farming paradigm is one realistic use cases which Wireless Power Transfer, assisted by Unmanned Aerial Vehicle, will be demonstrated as a proof-of-concept, to deliver energy wireless sensor networks. this work, we provide feasible solution rectifying antenna module rectenna system,...