Results 51 to 60 of about 683,462 (316)

Experimental Study of LoRa Modulation Immunity to Doppler Effect in CubeSat Radio Communications

open access: yesIEEE Access, 2019
Currently, LoRa technology is one of the most promising technologies in satellite Internet of Things. Particularly those based on satellite constellations in low Earth orbit, including the CubeSat nanosatellite constellations.
A. Doroshkin   +4 more
semanticscholar   +1 more source

Poly(lactic‐co‐glycolic acid) Nanoparticles for IL‐12 Self‐Amplifying RNA Delivery in Glioblastoma Models

open access: yesAdvanced Functional Materials, EarlyView.
xxxx. ABSTRACT Glioblastoma (GBM) remains one of the most lethal brain cancers, with median survival rarely exceeding 15 months after diagnosis. Interleukin‐12 (IL‐12) is a potent immunostimulatory cytokine capable of reshaping the tumor microenvironment (TME), yet its clinical translation is hindered by systemic toxicity and short half‐life. RNA‐based
Fatima Hameedat   +11 more
wiley   +1 more source

A Review of Progress and Applications of Pulsed Doppler Wind LiDARs

open access: yesRemote Sensing, 2019
Doppler wind LiDAR (Light Detection And Ranging) makes use of the principle of optical Doppler shift between the reference and backscattered radiations to measure radial velocities at distances up to several kilometers above the ground.
Zhengliang Liu   +7 more
semanticscholar   +1 more source

Limits on Planetary Companions from Doppler Surveys of Nearby Stars [PDF]

open access: yes, 2016
Most of our knowledge of planets orbiting nearby stars comes from Doppler surveys. For spaced-based, high-contrast imaging missions, nearby stars with Doppler-discovered planets are attractive targets.
A. Howard, B. Fulton
semanticscholar   +1 more source

Advances in Bioprinting to Model Immune‐Mediated Skin Diseases

open access: yesAdvanced Healthcare Materials, EarlyView.
This review explores how 3D bioprinting drives innovation in developing in vitro skin models that mimic immune‐mediated diseases. It highlights current technologies, key applications in studying skin pathologies, and emerging challenges. The review points toward future opportunities for improving disease modeling and advancing therapeutic and cosmetic ...
Andrea Ulloa‐Fernández   +4 more
wiley   +1 more source

Versatile mobile communications simulation: the Vienna 5G Link Level Simulator

open access: yesEURASIP Journal on Wireless Communications and Networking, 2018
Research and development of mobile communications systems require a detailed analysis and evaluation of novel technologies to further enhance spectral efficiency, connectivity and reliability.
Stefan Pratschner   +7 more
doaj   +1 more source

Evaluation of carotid flow time to assess fluid responsiveness in the emergency department

open access: yesJournal of Medical Ultrasound, 2021
Background: Assessing fluid responsiveness in critically ill patients is challenging. Objective, noninvasive tests that are easy to perform are needed. Doppler measurements of dynamic carotid artery parameters such as carotid blood flow (CBF) and carotid
P Immanuel Judson   +3 more
doaj   +1 more source

Radar micro-Doppler signatures of drones and birds at K-band and W-band

open access: yesScientific Reports, 2018
Due to the substantial increase in the number of affordable drones in the consumer market and their regrettable misuse, there is a need for efficient technology to detect drones in airspace.
S. Rahman, D. Robertson
semanticscholar   +1 more source

Dual‐Functional Polyphosphoesters for Gene Delivery: Synergistic Effects of Guanidinium and Hydrophobic Side Chains in Degradable Polymers

open access: yesAdvanced Healthcare Materials, EarlyView.
This study presents guanidinium‐ and indole‐functionalized polyphosphoesters as degradable, non‐viral gene delivery vectors. Through precise tuning of charge density and hydrophobicity, these polymers form stable polyplexes with low toxicity. Remarkably, minor structural changes yield up to 200‐fold differences in transfection efficiency, highlighting ...
Markus Kötzsche   +8 more
wiley   +1 more source

Prognostic accuracy of cerebroplacental ratio and middle cerebral artery Doppler for adverse perinatal outcome: systematic review and meta‐analysis

open access: yesUltrasound in Obstetrics and Gynecology, 2018
Doppler ultrasonographic assessment of the cerebroplacental ratio (CPR) and middle cerebral artery (MCA) is widely used as an adjunct to umbilical artery (UA) Doppler to identify fetuses at risk of adverse perinatal outcome.
C. V. Heidweiller‐Schreurs   +7 more
semanticscholar   +1 more source

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