Results 101 to 110 of about 8,695 (248)

The Effect of Light Intensity, Camera Pixel Quality, Camera Distance, and Object Altitude on Detection Accuracy in a Real-Time Drone Surveillance System Using YOLOv5

Journal of Innovation Information Technology and Application
This research evaluates the performance of the drone detection system based on YOLOv5 in a variety of environmental conditions. The four main variables under test were drone height, camera type, light intensity, and camera-to-object distance.
Astika Ayuningtyas, Imam Riadi, Anton Yudhana   +2 more
doaj   +1 more source

Ion‐Reconfigurable “N”‐Shaped Antiambipolar Behavior in Organic Electrochemical Transistors

Advanced Materials, EarlyView.
A unique N‐shaped negative differential transconductance (NDT) characteristics is demonstrated in single‐polymer organic electrochemical transistors through a sequential doping–redox–doping process driven by iodide ions. This redox‐driven mechanism enables low‐voltage, ion‐controlled reconfigurability and tunable current modulation, allowing seamless ...
Debdatta Panigrahi, Daniele Zucchelli, Zeinab Hamid, Christina Kousseff, Arup Sarkar, Aristea Pavlou, Zhitian Ling, Somayeh Kashani, Iain McCulloch, Paul W. M. Blom, Fabrizio Torricelli, Paschalis Gkoupidenis   +11 more
wiley   +1 more source

Room‐Temperature Skyrmionic Synapse in 2D Ferromagnet Fe3GaTe2 Operating via Collective Spin Texture Transformation

Advanced Materials, EarlyView.
We demonstrate a neuromorphic synapse in 2D Fe3GaTe2 flakes. The device operates via a current‐driven transformation from a skyrmion‐lattice to a stripe‐domain state, yielding a linear anomalous Hall resistance response with a tunable slope to enable multiply‐accumulate operations. Simulations confirm its viability in artificial neural networks.
Jixiang Huang, Tongji Zhu, PeiYu Cai, Xiaoming Ma, Zhen Wang, Ruifu Zhang, Yi Hao, Jingdi Lu, Liubing He, Jun Xu, Yuejie Zhang, Wanjun Jiang, Jing Tao, Shiming Lei, Pavel Parchinskiy, Jing Teng, Lingfei Wang, Wei Niu, Elton J.G. Santos, Xiaoqian Zhang, Peng Li   +20 more
wiley   +1 more source

Single-Camera-Based 3D Drone Trajectory Reconstruction for Surveillance Systems

IEEE Access
Drones have been utilized in various fields, but the number of drones being used illegally and for illegal and hazardous purposes has recently increased.
Seo-Bin Hwang, Yeong-Jun Cho
doaj   +1 more source

Drone Detection and Defense Systems: Survey and a Software-Defined Radio-Based Solution. [PDF]

Sensors (Basel), 2022
Chiper FL, Martian A, Vladeanu C, Marghescu I, Craciunescu R, Fratu O.   +5 more
europepmc   +1 more source

Acoustic Drone Package Delivery Detection

CoRR
In recent years, the illicit use of unmanned aerial vehicles (UAVs) for deliveries in restricted area such as prisons became a significant security challenge. While numerous studies have focused on UAV detection or localization, little attention has been given to delivery events identification.
François Marcoux, François Grondin
openaire   +2 more sources

Signatures of Edge States in Antiferromagnetic Van der Waals Josephson Junctions

Advanced Materials, EarlyView.
ABSTRACT The combination of superconductivity and magnetic textures leads to unconventional superconducting phenomena, including new correlated and topological phases. Van der Waals (vdW) materials emerge as a versatile platform for exploring the interplay between these two competing orders.
Celia González‐Sánchez, Ignacio Sardinero, Jorge Cuadra, Alfredo Spuri, José A. Moreno, Hermann Suderow, Elke Scheer, Pablo Burset, Angelo Di Bernardo, Rubén Seoane Souto, Eduardo J. H. Lee   +10 more
wiley   +1 more source

Multi-agent anti-drone architecture using an electromagnetic neutralization assisted by an event-triggered expert system and Blockchain-based approach

Scientific African
The rapid proliferation of drones has raised security, safety, and privacy concerns with their anarchic and malevolent deployment, which represent significant public threats to critical infrastructures. Against this growing threat, advanced holistic anti-
Yasmine Ghazlane, Bnouachir Hajar, El Maghraoui Hajar, Belkhala Sofia   +3 more
doaj   +1 more source

n‐Type Polymer Radio Frequency Rectifiers Operating at 18.5 GHz

Advanced Materials, EarlyView.
Combining an n‐doped polymer semiconductor with wafer‐scale asymmetric planar electrodes featuring work function‐engineered contacts yields radio‐frequency diodes and rectifying circuits operating at up to 18.5 GHz. The devices combine scalable manufacturing with an operating frequency previously unattainable by large‐area organic electronics ...
Lazaros Panagiotidis, Filip Aniés, Yiyang Yu, Mohammed Ghadiyali, Hendrik Faber, Zhanibek Bizak, Youssef Kabri, Pavlos Tzourmpakis, Suman Mandal, Linqu Luo, Temur Maksudov, Mohamad Insan Nugraha, Harold F. Mazo‐Mantilla, Patrice Vanelle, Julie Broggi, Khaled N. Salama, Udo Schwingenschlögl, Martin Heeney, Atif Shamim, Thomas D. Anthopoulos   +19 more
wiley   +1 more source

Federated learning based Dynamic Multi-Scale Attention Network for secure drone and base station communication

Alexandria Engineering Journal
Drone communication networks – especially those relying on Drone-to-Drone (Dr2Dr) and Drone-to-Base Station (Dr2BS) links – are increasingly vulnerable to threats like DDoS, GPS spoofing, and jamming.
Ameen Banjar, Abdulrahman A. Alshdadi
doaj   +1 more source