Results 41 to 50 of about 789,573 (302)

Influence of weather variables on atmospheric refractivity over Auchi Town, Edo State, Nigeria

Journal of Applied Sciences and Environmental Management, 2018
In this study, atmospheric variables such as air temperature, relative humidity and atmospheric pressure were evaluated in order to determine the atmospheric refractivity over Auchi town in Edo State, Nigeria using a portable weather monitoring system ...
K.E. Ukhurebor, S.O. Azi, I.C. Abiodun, S.E. Ojiemudia   +3 more
doaj   +1 more source

Super‐refraction effects on GPS radio occultation refractivity in marine boundary layers [PDF]

Geophysical Research Letters, 2010
With the combination of global coverage, high vertical resolution, and all‐weather capability, GPS radio occultation (RO) is an emerging satellite remote sensing technique that can probe the atmospheric boundary layer (ABL) on a global basis. However, a systematic negative bias (commonly referred to as N‐bias) remains in derived refractivity profiles ...
F. Xie, D. L. Wu, C. O. Ao, E. R. Kursinski, A. J. Mannucci, S. Syndergaard   +5 more
openaire   +1 more source

Advances in Sustainable and Wearable Textile Based Soft Robotics

Advanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas, Marzia Dulal, Sophia K. Novoselov, Victoria K. Novoselov, Kostya S. Novoselov, Shaila Afroj, Nazmul Karim   +6 more
wiley   +1 more source

Tropospheric radio refractivity trends over vegetation regions in Nigeria

, 2022
Refractivity is an important parameter in understanding radio wave propagation in the troposphere. We investigated both the monthly variations of refractivity and its trends over vegetation regions in Nigeria.
Agbo, Godwin A., Najib, Yusuf, Okoh, Daniel I., Ibeh, Gabriel F., Onuorah, Loretta O.   +4 more
core  

Bio‐Inspired Synthesis of Macroporous Single Crystal Particles as Scattering Agents

Advanced Functional Materials, EarlyView.
A general strategy is presented that delivers unique, single‐crystal microparticles that combine submicron macroporosity and uniform particle shapes. A bioinspired approach is used to occlude three distinct types of additives – polystyrene microspheres, polymer vesicles and amino acids – within calcite single crystals, and subsequent thermal annealing ...
Stephanie E. Foster, Gianni Jacucci, Ouassef Nahi, Thomas Kress, Zabeada Aslam, Stuart Micklethwaite, Alexander N. Kulak, Rik Drummond‐Brydson, Melinda J. Duer, Yi‐Yeoun Kim, Silvia Vignolini, Fiona C. Meldrum   +11 more
wiley   +1 more source

Analysis of Radio Refractivity Variations Across Geographical Coordinates of Nigeria [PDF]

, 2018
Radio refractivity variations across geographical coordinates of Nigeria has been studied using relative humidity, air pressure and air temperature data from 2012 to 2013 obtained from archives of Nigeria Air Space Development Research Agency, Department
Segun, Adewumi Adebayo, Kehinde, Adeleke David, Adebambo, Akingboye Ahmed   +2 more
core  

SPACIO-TEMPORAL VARIATION OF RADIO REFRACTIVITY IN LAFIA, NASARAWA STATE USING CM SAF ATOVS SATELLITE DATA [PDF]

, 2016
Communications using radio waves propagates through the atmosphere and plays a major role in civilization. Vertical variation of radio refractivity in Lafia( 8.492°N and 8.517°E ) Nigeria, was investigated with a five-year (2010 – 2014) monthly mean ...
Abimbola, O. J., Omojola, J., Okonkwo, Nwamaka R., Akinyanju, D. S., Falaiye, O. A.   +4 more
core   +1 more source

Evaluation of daily tropospheric radio refractivity, refractivity gradient and geoclimatic factor over Otukpo, Benue State, Nigeria

African Scientific Reports
Radio refractivity is a key parameter for reliable terrestrial microwave-link design because the tropospheric propagation of radio waves is strongly affected by atmospheric refractive properties.
Emmanuel Daniel Onoja, Andrew Ichoja, Anthony Odeh Ejila, Majesty Oche Omikpa, Emmanuel Vezua Tikyaa, Elijah E. Onwoke, Jack Zuhumnan Kevin   +6 more
doaj   +1 more source

Grayscale Photomasks Enable Noncontact Optical Patterning of Hydroxypropyl Cellulose Gels for Dynamic Art

Advanced Functional Materials, EarlyView.
Mask‐encoded UV exposure translates digital color information into pixel‐resolved structural‐color patterns in hydroxypropyl cellulose gels. Gaussian‐process‐guided calibration links UV processing conditions, wavelength, and mask opacity, enabling parallel fabrication of multicolor images in a single 10 s exposure.
Mengting Ye, Yunyi Zhu, Sai Sabareesh KS, Md Ashiqur Rahman Alif, Yichen Wan, Ruobing Bai, Narges Pourjafarian, Stefanie Mueller, Hongli Zhu   +8 more
wiley   +1 more source

Spatial Variability of VHF FM Radio Signals with Surface Refractivity Values in Niger State, Nigeria [PDF]

, 2015
Radio refractivity N exerts considerable influence on radio signals at Very High Frequency (VHF) and higher frequency bands. In particular, surface refractivity correlates positively with radio field strength, and knowledge of its temporal and/or spatial
Eichie, J. O., Adediji, A. T., Oyedum, O. D., Igwe, K. C., Moses, A. S., Ajewole, M. O.   +5 more
core