Results 41 to 50 of about 118,033 (340)
IEEE Access, 2022 The Doppler effect critically degrades the performance of orthogonal frequency division multiplexing (OFDM) systems in general. This problem is significantly worse for underwater acoustic (UWA) communication systems due to the distinct characteristics of
Van Duc Nguyen +3 more
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Journal of the Practice of Cardiovascular Sciences, 2019 CA Doppler described the doppler effect which was a shift in the frequency of light. This theory was later used for multiple applications in electromagnetics, astronomy, physics, aviation and health sciences.
Shivani Vashistha, Soumi Das
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Assessment of Pain Types in Recently Diagnosed Patients With Inflammatory Arthritis
Arthritis Care &Research, EarlyView.Objective Up to 40% of patients with inflammatory arthritis (IA) experience persistent pain, traditionally thought to be associated with a shift from peripherally to centrally mediated pain during the disease course in some patients. We assessed sensory profiles of recently diagnosed individuals with IA, hypothesizing that pain reported at this early ...
Zoe Rutter‐Locher +8 more
wiley +1 more source
Advanced Functional Materials, EarlyView.The fabrication of patterned transition metal dichalcogenide (TMD)/graphene heterostructures via direct laser writing reveals new interface chemistry and enables efficient, customizable assembly. Selective laser irradiation of functionalized TMD/graphene triggers localized reactions, forming chemically modified interfaces.
Xin Chen +12 more
wiley +1 more source
Broadband Laser Doppler Frequency Shift Emulator for Satellite Laser Communication
IEEE Photonics Journal, 2019 A novel emulator of laser Doppler frequency shift (DFS) for satellite laser communication based on microwave photonics technology is proposed and experimentally demonstrated.
Jinye Li +6 more
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High Dynamic Range Thin‐Film Resistive Flow Sensors for Monitoring Diverse Biofluids
Advanced Functional Materials, EarlyView.Thin‐film resistive flow sensors with thermoresistive and piezoresistive mechanisms are developed for biofluid monitoring. Fabricated using biocompatible materials and laser micromachining, the devices achieve sub‐millimeter dimensions and a broad dynamic range.
Latifah Almulla +2 more
wiley +1 more source
Concept for automatic Doppler compensation in two-way communication systems [PDF]
, 1968 Automatic Frequency Control system compensates for Doppler shift in two-way communication systems where one or both stations are moving. This automatic correction can be applied to the reply link to elimate frequency search for the reply or an excessive ...
Muller, R. M.
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Advanced Functional Materials, EarlyView.Epitaxial piezoelectric α‐quartz/Si BioNEMS sensors, made using soft chemistry, effectively detect the Chikungunya virus. They have a mass sensitivity of 205 pg Hz−1 in liquid and can detect the virus at a limit of 9 ng mL−1. This development enables high‐frequency mass devices for point‐of‐care testing in healthcare and other electronic applications ...
Raissa Rathar +12 more
wiley +1 more source
What is Doppler ultrasound? [PDF]
, 2011 The term Doppler should be capitalized because it refers to Christian Johann Doppler, an Austrian physicist (1803–1853). He described a phenomenon whereby the frequency of sound changes when it is reflected off a moving object.
Vassallo, Pierre
core
Light shifts in atomic Bragg diffraction [PDF]
, 2016 Bragg diffraction of an atomic wave packet in a retroreflective geometry with two counterpropagating optical lattices exhibits a light shift induced phase. We show that the temporal shape of the light pulse determines the behavior of this phase shift: In
Abend, Sven +4 more
core +3 more sources