Results 71 to 80 of about 25,886 (293)

Learning from the COVID-19 lockdown in berlin: Observations and modelling to support understanding policies to reduce NO2.

Atmospheric Environment: X, 2021
Urban air pollution is a substantial threat to human health. Traffic emissions remain a large contributor to air pollution in urban areas. The mobility restrictions put in place in response to the COVID-19 pandemic provided a large-scale real-world ...
Erika von Schneidemesser, Bheki Sibiya, Alexandre Caseiro, Tim Butler, Mark G. Lawrence, Joana Leitao, Aurelia Lupascu, Pedro Salvador   +7 more
doaj   +1 more source

Causal‐Guided Ultra‐Long‐Term Time Series Forecasting Via Anticipated Covariates

Advanced Science, EarlyView.
Often treated as unknown, information from the future remains underutilized.We demonstrate that in a coupled dynamical system, providing the future state of the effect enables accurate forecasting of the cause for a long timesteps. A time series forecasting paradigm that introduces anticipated covariates to represent such known future states is ...
Jintong Zhao, Yufei Liu, Ruixi Huang, Zhongxue Gan, Siyang Leng   +4 more
wiley   +1 more source

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Air quality and urban climate improvements in the world’s most populated region during the COVID-19 pandemic

Environmental Research Letters
In this study, we assessed air quality (AQ) and urban climate during the mobility restrictions implemented in the Greater Tokyo Area, Japan, the world’s most populated region, in response to the COVID-19 pandemic. Observations from dense surface networks
Alessandro Damiani, Hitoshi Irie, Dmitry Belikov, Raul R Cordero, Sarah Feron, Noriko N Ishizaki   +5 more
doaj   +1 more source

Air Route Design of Multi-Rotor UAVs for Urban Air Mobility

Drones
UAVs will present significant air traffic in the urban airspace in the future, which brings new challenges to urban air traffic management and control.
Shan Li, Honghai Zhang, Zhuolun Li, Hao Liu   +3 more
doaj   +1 more source

Farmers’ Protests in Germany: Media Coverage and Types of Bias

Agribusiness, EarlyView.
ABSTRACT The German farmers’ protests of 2024 sparked widespread media coverage and public debate. Yet, media coverage was not always positive, reflecting the media's attention‐seeking and selective focus. Occurrences of farmers blocking media outlets reflected distrust in how their concerns were portrayed.
Felix Schlichte, Doris Läpple
wiley   +1 more source

High‐Speed Altitude Regulation With Neuromorphic Camera and Lightweight Embedded Computation

Advanced Intelligent Systems, EarlyView.
Neuromorphic cameras deliver rapid, high‐dynamic‐range sensing but overwhelm embedded processors at high speeds. This work presents a lightweight, optimized Lucas–Kanade optical flow method with parallelization, gyroscopic derotation, and adaptive event slicing.
Simon L. Jeger, Alessandro Marchei, Charbel Toumieh, Dario Floreano   +3 more
wiley   +1 more source

UAV-Enabled Video Streaming Architecture for Urban Air Mobility: A 6G-Based Approach Toward Low-Altitude 3D Transportation

As urban populations expand and congestion intensifies, traditional ground transportation struggles to satisfy escalating mobility demands. Unmanned Electric Vertical Take-Off and Landing (eVTOL) aircraft, as a key enabler of Urban Air Mobility (UAM ...
Ken-Wen Hu, Mei-En Jian, Yu-Sen Cheng, Liang-Chun Chen, Chenn-Jung Huang   +4 more
core   +1 more source

Air pollution modelling for birth cohorts: a time-space regression model [PDF]

, 2016
To investigate air pollution effects during pregnancy or in the first weeks of life, models are needed that capture both the spatial and temporal variability of air pollution exposures.; We developed a time-space exposure model for ambient NO2 ...
Georgette Stern, Edgar Delgado-Eckert, Latzin, Philipp, Frey, Urs, Urs Frey, Vienneau, Danielle, Tsai, Ming-Yi, Philipp Latzin, Delgado-Eckert, Edgar, Proietti, Elena, Röösli, Martin, Ming-Yi Tsai, Danielle Vienneau, Martin Röösli, Stern, Georgette, Elena Proietti   +15 more
core   +1 more source