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Advanced Science, EarlyView.A bio‑based thermoresponsive controlled‑release fertilizer (TRBF) is fabricated by introducing F127 into a castor‑oil‑derived polyurethane coating. Distinct from conventional bio‑based coated fertilizer (BCF), TRBF achieves temperature‑regulated nitrogen release via F127 reversible phase transition, suppressing nutrient leakage at low temperature and ...
Jiahui Liu +11 more
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Phase Synchronization Between Tropospheric Radio Refractivity and Rainfall Amount in a Tropical Region [PDF]
Journal of Atmospheric and Solar-Terrestrial Physics, 2016 This study investigated linear and nonlinear relationship between the amount of rainfall and radio refractivity in a tropical country, Nigeria using forty seven locations scattered across the country. Correlation and Phase synchronization measures were
Ibiyinka A. Fuwape +2 more
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Radio Science, 1977
Observations of extraterrestrial radio sources at the lower end of the radio frequency spectrum are limited by reflection of waves from the topside ionosphere and by the large size of antenna apertures necessary for the realization of narrow beamwidths. The use of the ionosphere as a lens is considered.
Paul Bernhardt, A. V. da Rosa
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Observations of extraterrestrial radio sources at the lower end of the radio frequency spectrum are limited by reflection of waves from the topside ionosphere and by the large size of antenna apertures necessary for the realization of narrow beamwidths. The use of the ionosphere as a lens is considered.
Paul Bernhardt, A. V. da Rosa
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Refraction of Short Radio Waves in the Upper Atmosphere
Transactions of the American Institute of Electrical Engineers, 1926The paper shows that the striking phenomena of short-wave radio transmission (i. e., below 60 meters) can be quantitatively accounted for on a simnple electron refraction theory in which the effect of the earth's magnetic field and electron collisions may be neglected as a first approximation. The distribution and number of electrons per unit volume in
William G. Baker, Chester W. Rice
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Assessment of Tropospheric Radio Refractivity and Its Variation With Climatic Variables in the Guinea Savannah Region of Nigeria [PDF]
European Journal of Theoretical and Applied SciencesIn studies involving terrestrial atmospheric electromagnetic propagation, such as point-to-point microwave communication, terrestrial radio, television radio, television broadcast, and mobile communication systems, radio refractivity—the bending of a ...
Salihu Bolaji Sharafa, Gazali Bello
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Applications of the molecular refractivity in radio meteorology
Journal of Geophysical Research, 1959Consideration of the molecular refractivity has led to a value of the radio refractive index referred to zero altitude or sea level that effectively removes the systematic altitude dependence of air density. The advantages of this new parameter are illustrated by two applications.
B. R. Bean, R. M. Gallet
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Radio Refractivity Profile Over India
IETE Journal of Research, 1969Radio refractive conditions in India differ from those at extra tropical latitudes and data on Indian conditions are at present meagre.
S. P. Venkiteshwaran +2 more
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Models of the Atmospheric Radio Refractive Index
Proceedings of the IRE, 1959Evaluation of atmospheric refraction effects on UHFVHF radio propagation has long been accomplished with the convenient four-thirds earth concept of Schelling, Burrows, and Ferrell. This method has proven particularly useful in evaluating performance of point-to-point radio communications systems.
B. Bean, G. Thayer
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