Results 121 to 130 of about 993,247 (318)

Small target drone algorithm in low-altitude complex urban scenarios based on ESMS-YOLOv7

Cognitive Robotics
The increasing use and militarization of UAV technology presents significant challenges to nations and societies. Notably, there is a deficit in anti- UAV technologies for civilian use, particularly in complex urban environments at low altitudes.
Yuntao Wei, Xiujia Wang, Chunjuan Bo, Zhan Shi   +3 more
doaj   +1 more source

Advancing design strategies in smart stimulus‐responsive liposomes for drug release and nanomedicine

BMEMat, EarlyView.
Schematic illustration of stimulus‐responsive liposomes designed for controlled drug release and nanomedicine. The innermost circle represents different liposomal structures, including unilamellar, multilamellar, and multivesicular liposomes. The middle layer illustrates the responsive phospholipid components.
Yuchen Guo, Nan Li, Daiwei Zhang, Jingya Gu, Zhihuan Liao, Zihao Teng, Xiangfu Du, Peter S. Timashev, Shipeng Chen, Shuaidong Huo   +9 more
wiley   +1 more source

A Novel Stealthy Target Detection Based on Stratospheric Balloon-borne Positional Instability due to Random Wind [PDF]

, 2014
A novel detection for stealthy target model F-117A with a higher aspect vision is introduced by using Stratospheric Balloon-borne Bistatic system. The potential problem of proposed scheme is platform instability impacted on the balloon by external wind ...
Barbary, M., Zong, Peng
core   +1 more source

Mid‐Domain Effect and Wooded Habitat Shape Mediterranean Reptile Communities

Biological Diversity, EarlyView.
Analyzing a large number of reptiles observed across protected areas in Central Italy, we tested whether the mid‐domain effect explains hump‐shaped richness–elevation patterns. Species richness was best predicted by the combined influence of geometric constraints and woodland cover, revealing two contrasting species clusters and offering a robust ...
Daniele Dendi, Lauren De Nardi, Giovanni Amori, Luca Luiselli   +3 more
wiley   +1 more source

Host, vector, and parasite dynamics: exploring intrinsic and extrinsic factors shaping tick‐borne filarial nematode transmission

Biological Reviews, EarlyView.
ABSTRACT Tick‐borne filarial nematodes are a complex and understudied group of parasites that rely on ticks for transmission in vertebrates. This review examines how intrinsic and extrinsic factors may influence the successful transmission of filarial nematodes in tick vectors, drawing insights from extensively studied haematophagous dipteran vector ...
Oluwaseun D. Ajileye, Gabriel L. Hamer, Sarah A. Hamer, Guilherme G. Verocai, Jessica E. Light   +4 more
wiley   +1 more source

HD-BSNet: A Plug-and-Play Dual-Mechanism Synergistic Enhancement Framework for Small Object Detection

Remote Sensing
In remote sensing and low-altitude unmanned aerial vehicle(UAV) detection scenarios, small target detection is extremely challenging due to the low pixel proportion, sparse features, and complex backgrounds of targets.
Jianwei Wen, Xiangyue Zheng, Nian Pan, Dan Jia, Haiying Wu, Tao Chen, Jin Zhou   +6 more
doaj   +1 more source

4D Continuous Descent Operations Supported by an Electronic Flight Bag [PDF]

, 2016
This paper describes a set of flight simulation experiments carried out with the DLR’s Generic Cockpit Simulator (GECO). A new concept named time and energy managed operations (TEMO), which aims to enable advanced four dimensional (4D) continuous ...
Bendris, Bianca, Dalmau Codina, Ramon, Day, Brent, Kohrs, Ralf, Lenz, Helge, Montolio, Josep, Prats Menéndez, Xavier   +6 more
core  

How wildlife respond to tropical cyclones: short‐term tactics and long‐term impacts

Biological Reviews, EarlyView.
ABSTRACT From butterflies to lizards and from sharks to seabirds, wildlife exhibit tactics to survive the impacts of tropical cyclones, also known as hurricanes, cyclones, or typhoons depending on where they occur. Some species seek refuge during the storm by moving, some remain in place and ride it out, and others move longer distances, avoiding the ...
Erin L. Koen, Mohamed Khalil Meliane, Zachery B. Holmes, Karl E. Miller, William J. Barichivich, Emilie Dedeban, Alex Furst, Miranda Imeri, Peyton E. Niebanck, Samantha Nunn, Kailee Pearson, Nicole Rita, Brier Ryver, Dakotah Shaffer, Susan C. Walls, E. Hance Ellington   +15 more
wiley   +1 more source

Rethinking Climate Change on the Role of Human Power Generation, Alternative Perspectives, Potential Solutions, and a Plea for Action

Chemie Ingenieur Technik, EarlyView.
All energy matters Let us broaden the discussion on solutions to climate change. Greenhouse gases have upset the delicate equilibrium of the Earth's energy balance. Consequently, all sources of heat affect the temperature of the Earth. Although the amount of additional heat generated by humans is a fraction of that produced by the sun, it is generated ...
Martin Bertau, Gerald Steiner, Tom Harwood   +2 more
wiley   +1 more source

An Experimental Study of Passive UAV Tracking With Digital Arrays and Cellular Downlink Signals

IEEE Open Journal of the Communications Society
Given the prospects of the low-altitude economy (LAE) and the popularity of autonomous aerial vehicles (UAVs), there are increasing demands on monitoring flying objects at low altitude in wide urban areas.
Yifei Sun, Chao Yu, Yan Luo, Tony Xiao Han, Haisheng Tan, Rui Wang, Francis C. M. Lau   +6 more
doaj   +1 more source