Results 121 to 130 of about 6,842 (303)

Meteorological interpretation of near-surface refractivity measurements

open access: yes, 1999
Measurements of the radio refractive index (or refractivity) of near-surface air using phase information from radar ground echoes can be used to provide valuable humidity information on storm-scale anomalies not adequately resolved by the surface ...
Creese, Charles W.
core  

Refractivity Statistics For Two Countries In The Middle East [PDF]

open access: yes, 1989
This paper presents and compares the results of refractive index studies for Mersa Matrouh, Egypt, and Doha, Qatar. Statistics for surface refractivity and refractivity gradients at different heights from the surface are computed.
Kheirallah, H. N.
core  

Self‐Seeded Nucleation of PET in a Benign Solvent Yields a High Modulus Aerogel With Ultra‐Low Thermal Conductivity

open access: yesAdvanced Materials, EarlyView.
A new benign solvent (1,3‐diphenylacetone) enables a simple, safe, and sustainable dissolution and gelation method to convert waste PET into low density, monolithic aerogels with high mechanical strength (E = 20 MPa) and remarkably low thermal conductivity (k = 21.9 to 28.9 mW/m·K).
Kira R. Baugh   +9 more
wiley   +1 more source

The Investigation of Surface Radio Refractivity Over Lokoja, Kogi State Nigeria

open access: yesUMYU Scientifica Journal
This research investigated the variation of Surface Radio Refractivity and its propagation effects on radio signals over Lokoja, Kogi State, Nigeria.  The study used six years (2015-2020) of satellite data on temperature, pressure, relative humidity and
Akinbolati, A., Adamu, I., Adache, T. D.
doaj   +1 more source

Test problem 2: Actual and predicted (ANN) refractivity values.

open access: yes, 2018
Test problem 2: Actual and predicted (ANN) refractivity values.
Mueen Uddin (4903510)   +4 more
core   +1 more source

Leaf‐Inspired Eutectic Skin With Extreme Fatigue Resistance and Robust Wet Adhesion for Amphibious Epidermal Electronics

open access: yesAdvanced Materials, EarlyView.
Inspired by Acorus calamus leaves, a heterogeneous eutectic skin integrates an aligned fibrous network within a hydrophobic eutectogel matrix. This hierarchical architecture triggers strain‐induced crystallization to achieve exceptional mechanical toughness and durable wet adhesion.
Jiayu Hou   +16 more
wiley   +1 more source

Studies of Super-Refractivity and Ducting of Radiowaves in Nigeria

open access: yes, 2004
Studies of tropospheric refraction of long and short wavelength radio signals have been carried out in the coastal and savannah areas of Nigeria using meteorological data collected by radiosondes in Lagos (30 45' E, 60 28' N) and Kano (80 30' E, 120 2'N).
Falodun, E. S., Kolawole, L. B.
core   +1 more source

Programmable Stepwise Heteroepitaxial Growth of Colloidal Crystals With Different Phases

open access: yesAdvanced Materials, EarlyView.
Stepwise heteroepitaxial growth is adapted to colloidal crystal engineering with DNA, enabling face‐centered cubic (fcc) facets to grow on body‐centered cubic (bcc) crystals with 110 facets. This approach tolerates large lattice mismatches, extending heteroepitaxy beyond the limits of conventional atomic systems.
Xiaowei Liu   +9 more
wiley   +1 more source

Second‐Harmonic Hyper‐Mie Optical Activity Enables Closed‐Loop Chiral Photochemistry

open access: yesAdvanced Materials, EarlyView.
Nonlinear chiral photochemistry is demonstrated in CdTe/CdO nanohelices, where circularly polarized infrared light both drives and tracks photo‐oxidation via second‐harmonic scattering. This closed‐loop process reveals real‐time structural evolution, including shell fracturing and core exposure, accompanied by a transition from hyper‐Mie to hyper ...
Hoyeon Choi   +6 more
wiley   +1 more source

Click Here for Full Article Recursive Bayesian electromagnetic refractivity

open access: yes, 2008
[1] Estimation of the range- and height-dependent index of refraction over the sea surface facilitates prediction of ducted microwave propagation loss.
L. Ted Rogers   +5 more
core  

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