Results 71 to 80 of about 362,427 (261)

Design and optimization of grounded coplanar waveguide and chip cascade structure [PDF]

open access: yesJournal of Hebei University of Science and Technology
In order to solve the problem of decreasing transmission efficiency due to impedance abrupt change during the cascade between transmission line and chip, a matching band-line method for X~Ka band was proposed based on the ground coplanar waveguide and ...
Zhiyong MENG   +5 more
doaj   +1 more source

Assessment of Treatment Influence in Mobile Network Coverage on Board High-Speed Trains

open access: yesIEEE Access, 2020
In this paper, we investigate the systematic change in the signal quality of mobile telecommunication systems inside a high-speed train. Using commercial mobile phones, we perform measurements inside a carriage of a high-speed train with an installed ...
Orlando S. Trindade   +4 more
doaj   +1 more source

LTE Spectrum Sharing Research Testbed: Integrated Hardware, Software, Network and Data

open access: yes, 2017
This paper presents Virginia Tech's wireless testbed supporting research on long-term evolution (LTE) signaling and radio frequency (RF) spectrum coexistence. LTE is continuously refined and new features released.
Marojevic, Vuk   +2 more
core   +2 more sources

Trajectories of Physical Function in Canadian Children with Juvenile Idiopathic Arthritis

open access: yesArthritis Care &Research, Accepted Article.
Objectives We describe trajectories of physical function in children newly diagnosed with juvenile idiopathic arthritis (JIA) and identify trajectories with persisting functional impairments and associated baseline characteristics. Methods We included patients enrolled in the Canadian Alliance of Pediatric Rheumatology Investigators (CAPRI) Registry ...
Clare Cunningham   +14 more
wiley   +1 more source

Construction of Hybrid Dual Radio Frequency RSSI (HDRF-RSSI) Fingerprint Database and Indoor Location Method

open access: yesSensors, 2020
Radio frequency communication technology has not only greatly improved public network service, but also developed a new technological route for indoor navigation service.
Haotai Sun   +3 more
doaj   +1 more source

Assessing the Sensitivity and the Clinical Impact of the 2023 American College of Rheumatology/EULAR Classification Criteria in Obstetric Antiphospholid Syndrome: Findings From a Multicenter Italian Cohort With a Long‐Term Follow‐Up

open access: yesArthritis Care &Research, EarlyView.
Objective The aim of this study was to evaluate the sensitivity of the 2023 American College of Rheumatology (ACR)/EULAR classification criteria for antiphospholipid syndrome (APS) in a real‐world cohort of women diagnosed with primary obstetric APS (oAPS) and to assess their ability to identify patients at risk of future pregnancy complications ...
Francesca Ruffilli   +10 more
wiley   +1 more source

A Novel Enhanced Positioning Trilateration Algorithm Implemented for Medical Implant In-Body Localization

open access: yesInternational Journal of Antennas and Propagation, 2013
Medical implants based on wireless communication will play crucial role in healthcare systems. Some applications need to know the exact position of each implant. RF positioning seems to be an effective approach for implant localization.
Peter Brida, Juraj Machaj
doaj   +1 more source

Spectral shearing of quantum light pulses by electro-optic phase modulation

open access: yes, 2017
Frequency conversion of non-classical light enables robust encoding of quantum information based upon spectral multiplexing that is particularly well-suited to integrated-optics platforms.
Karpinski, Michal   +3 more
core   +1 more source

Cumulative Social Disadvantage and Disease Activity in Juvenile Idiopathic Arthritis: A Childhood Arthritis and Rheumatology Research Alliance Registry Study

open access: yesArthritis Care &Research, EarlyView.
Objective Social determinants of health (SDOH) contribute to juvenile idiopathic arthritis (JIA) disparities, but most studies have assessed SDOH independently rather than cumulatively across individual, family, and neighborhood levels. Using a socioecological framework, we investigated the relationship among cumulative social disadvantage ...
William Daniel Soulsby   +448 more
wiley   +1 more source

Research on improved region division method in underground WLAN location fingerprints positioning

open access: yesGong-kuang zidonghua, 2020
Underground WLAN location fingerprinting personnel positioning system mainly realizes overall division of location fingerprinting samples through clustering algorithm, but existing clustering algorithm only carries out the clustering division according ...
SONG Mingzhi   +2 more
doaj   +1 more source

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