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Go to Editorial ManagerThis paper discusses the design and performance of a frequency reconfigurable antenna for Internet of Things (IoT) applications. The antenna is designed to operate on multiple frequency bands and be reconfigurable to adjust to different communication standards and environmental conditions. The antenna design consists of monopole with one PIN diode and 50Ωfeed line. By changing the states of the diode, the antenna can be reconfigured to operate in a dual-band mode and a wideband mode. The performance of the antenna was evaluated through simulation. The antenna demonstrated good impedance matching, acceptable gain, and stable radiation patterns across the different frequency bands. The antenna has compact dimensions of (26×19×1.6) mm3. It covers the frequency range 2.95 GHz -8.2 GHz, while the coverage of the dual- band mode is (2.7-3.8) GHz and (4.57-7.4) GHz. The peak gain is 1.57 dBi for the wideband mode with omnidirectional radiation pattern. On the other hand, the peak gain of the dual-band mode is 0.87 dBi at 3 GHz and 0.47 dBi at 6 GHz with an omnidirectional radiation pattern too.
Software Defined Wireless Sensor Networks (SDWSN) has emerged as a contemporary model to achieve dynamic and secure control in the realm of Internet of Things (IoT) applications. By leveraging the benefits of Software Defined Networks (SDN), SDWSN enables ease of management and configuration of wireless networks, thereby overcoming the challenges associated with traditional Wireless Sensor Networks (WSN). However, SDWSN networks are susceptible to emerging network intrusion and threats, particularly Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks, which can significantly impact the network’s performance and cause operational losses. This study proposes a machine learning based algorithm for detecting and preventing DoS and DDoS attacks in SDWSN networks. The proposed algorithm uses various features to distinguish between benign traffic and malicious traffic generated by attacks. The results demonstrate that the proposed algorithm can effectively detect and prevent DoS attacks, significantly contributing to the security of SDWSN networks.
In smart cities, health care, industrial production, and many other fields, the Internet of Things (IoT) have had significant success. Protected agriculture has numerous IoT applications, a highly effective style of modern agriculture development that uses artificial ways to manipulate climatic parameters such as temperature to create ideal circumstances for the growth of animals and plants. Convolutional Neural Networks (CNNs) is a deep learning approach that has made significant progress in image processing. From 2016 to the present, various applications for the automatic diagnosis of agricultural diseases, identifying plant pests, predicting the number of crops, etc., have been developed. This paper involves a presentation of the Internet of Things system in agriculture and its deep learning applications. It summarizes the most essential sensors used and methods of communication between them, in addition to the most important deep learning algorithms devoted to intelligent agriculture.