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HIGH-FREQUENCY ELECTRIC CURRENT FOR DRYING OF WOOD - HISTORICAL PERSPECTIVES
(Universidad del Bío-Bío, 2006)
Predictions of HF system performance for propagation through disturbed ionospheres measured using low‐Earth‐orbit satellite radio beacon tomography
(American Geophysical Union, 2014-07)
The CERTO radio beacon on the C/NOFS satellite sends VHF/UHF radio signals at 150 and 400 MHz to provide measurements of integrated electron density or Total Electron Content (TEC) by an east‐west chain of ground receivers ...
Estimation of Frequencies for National Shortwave Network with Automatic Link Establishment Equipment
(Universidad de Costa Rica, 2017)
Measurements of Extremely Low Frequency Waves (1-12 Hz) Produced by Ionospheric High-Frequency Waves
(IEEE, 2017)
In a recent study, a process for the generation of Extremely Low Frequency (ELF) waves in the range of 1-12 Hz produced by diamagnetic currents generated by heat in ionosphere by high frequency (HF) waves has been proposed. ...
Steady-state analysis and experimental evaluation of a resonant AC/DC converter for HF sinusoidal AC power distribution systems
(World Scientific, 2019-03)
The high frequency (HF) alternating current (AC) power distribution systems have significant advantages over their DC counterparts. This paper presents the analysis and experimental evaluation of an AC/DC resonant converter, ...
Unveiling low-to-high-frequency data sampling caveats for aquaculture environmental monitoring and management
(2021-07-01)
Aiming at the sustainability of aquaculture production, producers should adopt tools and protocols for environmental monitoring and management of these enterprises. There are currently issues concerning the efficacy of ...
Can The Alendronate Dosage Be Altered When Combined With High-frequency Loading In Osteoporosis Treatment?
(Springer London LtdLondon, 2017)
Implementación de una mejora continua basada en la confiabilidad de los servicios de mantenimiento de los equipos de comunicación de alta frecuencia (HF) de helicópteros MI-17-IV en el Centro de Mantenimiento Aeronaval de la Armada de México
(09/02/2012)
ABSTRACT: This work is the compilation of developing a proposal for continued improvement in the servicing and maintenance of equipment for high frequency (HF) of MI-17-IV. To which is supported by a framework based on ...
Mapping irregularities in the postsunset equatorial ionosphere with an expanded network of HF beacons
(American Geophysical Union, 2021-07)
Data from a network of high-frequency (HF) beacons deployed in Peru are used to estimate the regional ionospheric electron density in a volume. Pseudorange, accumulated carrier phase, and signal power measurements for each ...
Fractal dynamics of heart rate variability for short term
(2014)
The fractal analysis of heart rate variability (HRV) has been associated to the chaos theory. We evaluated the association of the fractal exponents of HRV with the time and frequency domain and geometric indices of HRV for ...