Results 1 to 10 of about 5,408,218 (178)

Generation Mechanism and Characteristic Analysis of Dual-Frequency Pseudo-Signal Interference of the Swept-Frequency Radar

International Journal of Antennas and Propagation, 2022
In order to master the law of the pseudo-signal interference effect of dual-frequency electromagnetic radiation in typical radar equipment, a certain type of Ku-band swept-frequency ranging radar was used as the test object to carry out single-frequency ...
Hong-Ze Zhao, Guang-Hui Wei, Xiao-Dong Pan, Xue Du, Xu-Xu Lyu   +4 more
doaj   +1 more source

A small-spot deformation camouflage design algorithm based on background texture matching

Defence Technology, 2023
In order to solve the problem of poor fusion between the spots of deformation camouflage and the background, a small-spot deformation camouflage design algorithm based on background texture matching is proposed in this research.
Xin Yang, Wei-dong Xu, Jun Liu, Qi Jia, Heng Liu, Jian-guo Ran, Liang Zhou, Yue Zhang, You-bin Hao, Chao-chang Liu   +9 more
doaj   +1 more source

Nontarget mass spectrometry and in silico molecular characterization of air pollution from the Indian subcontinent

Communications Earth & Environment, 2022
A combination of high-resolution mass spectrometry and computational molecular characterization techniques can structurally annotate up to 17% of organic compounds in fine particulate matter in highly polluted air sampled in the Maldives.
Stefano Papazian, Lisa A. D’Agostino, Ioannis Sadiktsis, Jean Froment, Bénilde Bonnefille, Kalliroi Sdougkou, Hongyu Xie, Ioannis Athanassiadis, Krishnakant Budhavant, Sanjeev Dasari, August Andersson, Örjan Gustafsson, Jonathan W. Martin   +12 more
doaj   +1 more source

Different Sensitivity of Advanced Bronchial and Alveolar Mono- and Coculture Models for Hazard Assessment of Nanomaterials

Nanomaterials, 2023
For the next-generation risk assessment (NGRA) of chemicals and nanomaterials, new approach methodologies (NAMs) are needed for hazard assessment in compliance with the 3R’s to reduce, replace and refine animal experiments.
Elisabeth Elje, Espen Mariussen, Erin McFadden, Maria Dusinska, Elise Rundén-Pran   +4 more
doaj   +1 more source

Research on the Calculation Method of Electrostatic Field of a Thunderstorm Cloud

Mathematics, 2022
The electrostatic field in the space excited by a thunderstorm cloud reflects the trend of the spatial potential and has a great influence on the selection of lightning discharge paths.
Lin Wang, Haojiang Wan, Yazhou Chen
doaj   +1 more source

Place effects on environmental views [PDF]

, 2010
How people respond to questions involving the environment depends partly on individual characteristics. Characteristics such as age, gender, education, and ideology constitute the well-studied social bases of environmental concern, which have been ...
Colocousis, Chris R., Duncan, Cynthia M., Hamilton, Lawrence C.   +2 more
core   +3 more sources

Environmental risk factors for Toxoplasma gondii infections and the impact of latent infections on allostatic load in residents of Central North Carolina

BMC Infectious Diseases, 2018
Background Toxoplasma gondii infection can be acquired through ingestion of infectious tissue cysts in undercooked meat or environmental oocysts excreted by cats. This cross-sectional study assessed environmental risk factors for T. gondii infections and
Andrey I. Egorov, Reagan Converse, Shannon M. Griffin, Jennifer Styles, Elizabeth Klein, Elizabeth Sams, Edward Hudgens, Timothy J. Wade   +7 more
doaj   +1 more source

Experimental Study on the Transient Disturbance Characteristics and Influence Factors of Pantograph–Catenary Discharge

Energies, 2022
The transient electromagnetic disturbance generated by arcing discharge between the pantograph and catenary can pose a significant risk to the safe operation of electrified railways.
Mengzhe Jin, Man Hu, Hao Li, Yixuan Yang, Weidong Liu, Qingyuan Fang, Shanghe Liu   +6 more
doaj   +1 more source

Efficient Rigorous Coupled-Wave Analysis Without Solving Eigenvalues for Analyzing One-Dimensional Ultrathin Periodic Structures

IEEE Access, 2020
Based on the first-order Taylor expansion, an efficient Rigorous Coupled-Wave Analysis (RCWA) for one-dimensional ultrathin periodic structures is proposed in this paper.
Jie Li, Jian-Bao Wang, Zheng Sun, Li-Hua Shi, Yao Ma, Qi Zhang, Shang-Chen Fu, Yi-Cheng Liu, Yu-Zhou Ran   +8 more
doaj   +1 more source

Quantifying sources of variability in neonicotinoid residue data for assessing risks to pollinators

Julius-Kühn-Archiv, 2018
The U.S. Environmental Protection Agency’s 2014 guidance for assessing pesticide risks to bees relies on higher-tier studies of residues in pollen and nectar to refine pesticide exposure estimates obtained from lower tier information (e.g., default ...
Sappington, Keith, Mroz, Ryan, Garber, Kris, Farruggia, Frank, Wagman, Michael, Blankinship, Amy, Koper, Chris   +6 more
doaj   +1 more source