Results 51 to 60 of about 243 (163)

Effectiveness of French Phonological Components Analysis in individuals with chronic aphasia

open access: yesInternational Journal of Language &Communication Disorders, Volume 59, Issue 6, Page 2239-2264, November/December 2024.
Abstract Background Over 50% of individuals with aphasia face ongoing word‐finding issues. Studies have found phonologically oriented therapy helpful for English speakers, but this has not yet been studied in French. It is essential to assess the effectiveness of such a therapy in French, considering the distinct linguistic typologies between both ...
Michèle Masson‐Trottier   +4 more
wiley   +1 more source

Critical care unit bed availability and postoperative outcomes: a multinational cohort study

open access: yesAnaesthesia, Volume 79, Issue 11, Page 1165-1179, November 2024.
Summary Background Critical care beds are a limited resource, yet research indicates that recommendations for postoperative critical care admission based on patient‐level risk stratification are not followed. It is unclear how prioritisation decisions are made in real‐world settings and the effect of this prioritisation on outcomes.
Ruaraidh A. S. Campbell   +3008 more
wiley   +1 more source

Multi-Layer LEO Constellation Optimization for GLONASS Augmentation: Geometric Complementarity and Rapid PPP Convergence

open access: yesApplied Sciences
The GLONASS constellation suffers from inherent geometric weaknesses in mid–low latitude regions, where uneven satellite elevation distribution leads to degraded PDOP and limits high-precision positioning performance.
Hao Xu   +3 more
doaj   +1 more source

Adaptable Meta-Signal Tracking for Next-Generation Satellite Navigation Systems and LEO PNT

open access: yesIEEE Access
In this study, the concept of multichannel signal tracking, previously discussed in the Global Navigation Satellite System literature, is expanded towards next-generation satellite navigation paradigms by leveraging multiple narrowband signals that are ...
Andrea Nardin   +3 more
doaj   +1 more source

Real-Time LEO Satellite Clocks Based on Near-Real-Time Clock Determination with Ultra-Short-Term Prediction

open access: yesRemote Sensing
The utilization of Low Earth Orbit (LEO) satellites is anticipated to augment various aspects of traditional GNSS-based Positioning, Navigation, and Timing (PNT) services. While the LEO satellite orbital products can nowadays be produced with rather high
Meifang Wu   +7 more
doaj   +1 more source

A Comparative study on ranging accuracy and interference robustness of LEO-PNT systems in urban and rural scenarios

open access: yesSatellite Navigation
While Global Navigation Satellite Systems (GNSS) have been the primary Positioning, Navigation, and Timing (PNT) solution since their advent, new technologies are being sought to address the limitations of GNSS.
Guillem Foreman-Campins   +2 more
doaj   +1 more source

Impact of Latency and Continuity of GNSS Products on Filter-Based Real-Time LEO Satellite Clock Determination

open access: yesRemote Sensing
High-precision Low Earth Orbit (LEO) satellite clocks are essential for LEO-augmented Positioning, Navigation, and Timing (PNT) services. Nowadays, high-precision LEO satellite clocks can be determined in real-time using a Kalman filter either onboard or
Meifang Wu   +8 more
doaj   +1 more source

Delay–Doppler Block Division Multiplexing: An Integrated Navigation and Communication Waveform for LEO PNT

open access: yesRemote Sensing
The recent rapid deployment of low-Earth-orbit (LEO) broadband constellations has positioned these systems as expected emerging navigation sources, thereby driving research interest in integrated navigation and communication (INAC) technologies. Existing
Dong Fu   +5 more
doaj   +1 more source

Optimizing the Deployment of Ground Tracking Stations for Low Earth Orbit Satellite Constellations Based on Evolutionary Algorithms

open access: yesRemote Sensing
Low Earth orbit (LEO) satellite constellations have emerged as an effective alternative for the provision of high-accuracy positioning, navigation and timing (PNT) solutions which are based on high-precision orbit and clock information.
Mansour Kralfallah   +4 more
doaj   +1 more source

Low earth orbit satellite positioning: exploration and prospects

open access: yes物联网学报
Global navigation satellite systems (GNSS) can provide all-day positioning, navigation, and timing (PNT) services in our daily life. However, the requirement of location is not limited to daily life.
LIU Xiangyu, LI Dongbo, LIU Jie
doaj   +2 more sources

Home - About - Disclaimer - Privacy