Results 181 to 190 of about 2,552,497 (284)

Stair‐Climbing Wheelchairs for Enhanced Mobility: A Comprehensive Review of Fundamental Mechanisms, Design Concepts, and Performance Analysis

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT People with physical disabilities face significant mobility challenges while climbing uneven surfaces and staircases. In these circumstances, traditional wheelchairs do not provide stable, safely controlled mobility, underscoring the importance of building superior stair‐climbing wheelchairs for both medical and infrastructure purposes.
Gopisetti Manikanta   +10 more
wiley   +1 more source

Repurposing Bird‐Based Acoustic Models for Amphibian Surveys: Strengths and Limitations in Real‐World Deployments

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
In this study, we developed AnuraSearch, an open‐source classifier for 11 Ukrainian amphibian species, by repurposing the avian BirdNET algorithm via transfer learning to process over 18,000 h of autonomous acoustic recordings. Although the model demonstrated high precision and successfully reconstructed detailed seasonal and diel vocal activity ...
Vasylyna Strus   +5 more
wiley   +1 more source

Numerical investigation of downstream variations in bed‐surface characteristic grain size

open access: yesRiver, EarlyView.
Abstract The understanding of downstream fining in the characteristic grain sizes of river beds is well established, whereas downstream coarsening remains poorly understood and is often considered counterintuitive. This study has employed a one‐dimensional (1D) coupled mathematical model of nonuniform sediment transport to elucidate the mechanisms ...
Yingliang Che, Qianqian Xi, Peng Hu
wiley   +1 more source

Insights From the Alphasat Aldo Paraboni Experiment at Tito Scalo and Spino d'Adda: Characterizing Scintillation and Rain Attenuation at Ka‐ and Q‐Band Frequencies

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT We present experimental results on the relationship between rain attenuation and simultaneous scintillation during rain events, based on beacon signal measurements at 19.7 (Ka‐band) and 39.4 GHz (Q‐band) from the geosynchronous Alphasat satellite (25° E), received at two Italian ground stations, Spino d'Adda (42.1° slant path) and Tito Scalo ...
Miles Turner   +5 more
wiley   +1 more source

Competition Policy and Achieving Sustainable Development Goal 1 (No Poverty): The Role of Mergers and Acquisitions Adjudications in South Africa

open access: yesSustainable Development, EarlyView.
ABSTRACT South Africa faces persistently high poverty and inequality alongside a highly concentrated economic structure, raising questions about whether merger control, especially public‐interest provisions, can contribute to poverty reduction. However, empirical evidence directly linking merger adjudication outcomes to poverty remains limited.
Nicholas Ngepah   +2 more
wiley   +1 more source

Towards a Sustainable Future: The Role of Technological Innovation and Digitalization in European Union Climate Change Mitigation

open access: yesSustainable Development, EarlyView.
ABSTRACT Technological innovation and digitalization are widely viewed as key drivers of sustainable development, yet their effectiveness in reducing carbon emissions remains uncertain. This study examines how technological innovation, digitalization, energy structure, and economic activity shape both CO2 emissions and total factor productivity in 22 ...
Muhammad Waqas Khalid   +2 more
wiley   +1 more source

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