Results 51 to 60 of about 728,948 (294)

Metasurface‐Enabled Active‐Like Passive Radar

Advanced Science, EarlyView.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li, Jiawen Xu, Hanting Zhao, Xu Zhao, Yanjin Chen, Tie Jun Cui, Vincenzo Galdi, Lianlin Li   +7 more
wiley   +1 more source

Leveraging Bluetooth and GPS Sensors for Route-Level Passenger Origin–Destination Flow Estimation

Sensors
Accurate estimation of passenger origin–destination (OD) matrices is critical for optimizing public transportation systems, yet conventional methods face challenges, such as incomplete alighting data, high infrastructure costs, and privacy concerns. With
Junming Xu, Zhenxing Pan, Cheng Zhang, Xiaoguang Yang   +3 more
doaj   +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

Multi-layer regional railway network and equitable economic development of megaregions

npj Sustainable Mobility and Transport
Cities of different sizes and functions in megaregions have shown strong interest in more efficient and intimate transportation connections. Multi-layer regional railway networks (MRRN) make the connections possible and contribute to regional economic ...
Chengcheng Yu, Wentao Dong, Haocheng Lin, Yougeng Lu, Chen Wan, Yong Yin, Zhengtao Qin, Chao Yang, Quan Yuan   +8 more
doaj   +1 more source

Modeling the scaling properties of human mobility

, 2010
While the fat tailed jump size and the waiting time distributions characterizing individual human trajectories strongly suggest the relevance of the continuous time random walk (CTRW) models of human mobility, no one seriously believes that human traces ...
A Vespignani, AL Barabási, Albert-László Barabási, C Ratti, C Song, Chaoming Song, CT Brown, D Balcan, D Ben-Avraham, D Brockmann, DdS Price, EP Raposo, EW Montroll, F Eggenberger, GH Weiss, GM Viswanathan, GM Viswanathan, GU Yule, H Larralde, H Larralde, H Schiessel, HA Makse, HA Simon, HD Rozenfeld, J Drager, JE Gillis, L Hufnagel, MA Lomholt, MC González, MC Santos, P Wang, Pu Wang, R Metzler, RN Mantegna, S Ciliberti, S Eubank, S Redner, SB Yuste, Tal Koren, V Colizza, X Gabaix, YG Sinai, Z Toroczkai   +42 more
core   +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

The Dangers of Transplanting Planning Instruments

European Journal of Spatial Development, 2005
After the collapse of socialism and the consequent land privatisation process, Central Europe was left with an unfavourable agricultural production structure.
Terry Van Dijk
doaj   +3 more sources

Longitudinal study of changes in greenness exposure, physical activity and sedentary behavior in the ORISCAV-LUX cohort study

International Journal of Health Geographics
Background Greenness exposure has been associated with many health benefits, for example through the pathway of providing opportunities for physical activity (PA).
Juliette F. E. van Beek, Laurent Malisoux, Olivier Klein, Torsten Bohn, Marion Tharrey, Frank J. Van Lenthe, Mariëlle A. Beenackers, Martin Dijst, Camille Perchoux   +8 more
doaj   +1 more source

Measuring Nutrition Security Using the Consumer Food Data System Datasets

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT Nutrition security is an emerging concept lacking a consensus definition, conceptualization, or standardized measure. This perspectives manuscript synthesizes findings from two previously published analyses to assess the feasibility of using available measures of key dimensions of nutrition security from two Consumer Food Data System (CFDS ...
Vibha Bhargava, Jung Sun Lee, Travis A. Smith   +2 more
wiley   +1 more source

Estimating the Lag Time Between Flight Arrivals and Parking Exit Volumes at a Major Airport: A Practical Approach

IEEE Access
Predicting the movement of arriving passengers to their landside destination is of great value to airport landside operations. This paper focuses on the arriving passengers who leave the airport by private cars in the terminal parking lots.
Zhiyuan Shi, Ke Huang, Shaozhi Hong, Wanqing Su   +3 more
doaj   +1 more source