Results 81 to 90 of about 16,092 (254)

A Novel Tri-Beam Antenna System Based on U-Shaped Dipole [PDF]

Radioengineering, 2019
Consisting of 6 radiating elements and a 3×3 Butler matrix, a novel tri-beam antenna system is proposed in this paper. The radiating element consists of two U-shaped arms and coupled strips, which shows a wide impedance characteristic.
X. W. Dai, G. Q. Luo, H. Y. Jin, Z. Liao, Z. C. Hao   +4 more
doaj  

A recipe for recovery: diet as a decisive tool in species conservation

Oikos, EarlyView.
Animals consume foods in specific quantities and ratios to meet a multi‐dimensional nutrient target that maximizes their fitness. Attempts to reach this target in an ever‐changing nutritional landscape often influence animal foraging behavior, habitat choice, and food‐web interactions. Consequently, understanding the nutritional ecology of a species is
Noa Lavie, Yael Levinson, Jessica M. Rothman, Dror Hawlena   +3 more
wiley   +1 more source

Increased utilitarian value of invasive species in regions with long invasion history may limit public engagement for invasion control

PLANTS, PEOPLE, PLANET, EarlyView.
Positive perceptions of invasive species can hinder effective management, especially if management efforts that are rooted in scientific theories are misaligned with local ecological knowledge. We documented local ecological knowledge about land invasibility as predicted by invasion biology theories. Participants with greater local ecological knowledge
Laurel Mael Philpott, Orou G. Gaoue
wiley   +1 more source

Impact of Weak‐Constraint Four‐Dimensional Variational data assimilation on the prediction of a sudden stratospheric warming event in 2024

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The Weak‐Constraint Four‐Dimensional Variational (WC‐4DVAR) system markedly improved the analysis and forecasting of the 2024 sudden stratospheric warming (SSW) event. It reduced biases and enhanced 7–9 day predictions of temperature across the SSW life cycle, with the most pronounced gains for winds also during the critical onset period.
Shaoying Li, Weimin Zhang, Shuo Ma, Bainian Liu, Yanlai Zhao, Xiaoqun Cao   +5 more
wiley   +1 more source

Spatial Dynamics of Tourism Sustainability in EU Member States

Sustainable Development, EarlyView.
ABSTRACT This study introduces a synthetic indicator of tourism sustainability for the EU, bridging the gap between institutional monitoring and academic research. By applying the PROMETHEE II method to rank the 27 Member States in 2019 and 2023, the research transforms static data into a dynamic roadmap of post‐pandemic recovery. The findings reveal a
M. Rosario González‐Rodríguez, M. Carmen Díaz‐Fernández   +1 more
wiley   +1 more source

BUTLER Matrix for smart switched beam antenna applications

Derrotero, 2018
This paper describes the Butler Matrix’s state of the art in switched beam Smart antennas, as a result of the bibliographical revision of scientific articles, indexed journals, dissertations and books related to the subject.
Jorge Alberto Cabrera Botero, Carlos Iván Páez Rueda   +1 more
doaj  

A Modular Core–Shell Nanoparticle Platform for Dual‐Modal MRI–Luminescence With High Relaxivity

Small, EarlyView.
A modular core–shell nanoparticle platform is presented that combines high‐relaxivity magnetic resonance imaging (MRI) and long‐lived luminescence within a single, well‐defined architecture. Spatially controlled gadolinium(III) and terbium(III) complexes deliver reproducible dual‐modal agents with benchmark MRI performance.
Catherine J. Ashton, Jonathan Martinelli, Sara Camorali, Thomas R. Berki, Amy J. Managh, Constantina Sofroniou, Lorenzo Tei, Helen Willcock, Stephen J. Butler   +8 more
wiley   +1 more source

Nanomaterials‐Decorated Biomass‐Derived Carbon for Overall Water Splitting: Interfacial Engineering, Mechanistic Insights, and Device Translation

The Chemical Record, EarlyView.
Biomass‐derived carbon provides a sustainable, porous, and conductive scaffold that stabilizes nanomaterials for bifunctional hydrogen evolution reaction/oxygen evolution reaction catalysis. This review summarizes design strategies (defects, heteroatom doping, heterostructures, single atoms), mechanistic/density functional theory insights, degradation ...
Paricha Jebin, Md. Rakib Khan, Syed Shaheen Shah, S. M. Mostafa Kamal, Mst. Kaniz Subarna, Nipa Debnath, Md. Abdul Aziz, Bong‐Joong Kim, A. J. Saleh Ahammad   +8 more
wiley   +1 more source

Synthesis of Lossless Multiports as Minimum Depth Chessboard Networks

IEEE Open Journal of Circuits and Systems
The synthesis of lossless multiport networks is a classic topic of circuit theory, with broad application in various signal distribution and processing systems. This paper presents a method for synthesizing reciprocal lossless $N$ -port networks with an
Piero Angeletti, Antonio Morini, Antoine Roederer, Giovanni Toso   +3 more
doaj   +1 more source

Investigation of the Evolution Mechanism and Multiphysics Coupling in Tree‐Contact Single‐Phase‐to‐Ground Fault

High Voltage, EarlyView.
ABSTRACT Tree‐contact single‐phase‐to‐ground fault (TSF) is a common and hazardous type of failure in distribution networks. TSF is likely to occur when overhead conductors contact moist tree branches, potentially leading to insulation breakdown, posing serious threats to grid safety.
Wenjun Ning, Zuopeng Li, Mingxian Liu, Jianbo He, Tianxiang Chen, Shenli Jia   +5 more
wiley   +1 more source