Results 111 to 120 of about 392,818 (294)

Measurement of Rain Attenuation of Microwaves at 12.25GHz in Korea [PDF]

, 2005
We present here the results of the measurements of rain-induced attenuation in the vertically polarized signal propagating at 12.25GHz during some rain events, which occurred in the rainy season of the year 2001 at Yong-in, Korea. The attenuation measured experimentally was compared with that obtained using the International Telecommunication Union ...
openaire   +2 more sources

Sensitivity of Consecutive‐Dry‐Day Trends to Trace Loss in Matched Precipitation Archives

International Journal of Climatology, EarlyView.
Loss of trace precipitation information can turn valid dry days into missing observations that interrupt consecutive dry day (CDD) spells. Simulating this loss reduced the median cross‐archive CDD trend discrepancy by 88% across 205 matched Spanish station pairs; a separate global experiment converting documented traces to missing observations changed ...
Marc Sempera, Manuel Curado, Jose F. Vicent, Jorge Olcina Cantos   +3 more
wiley   +1 more source

Edaphic Controls Override Climatic and Management Effects on Soil Organic Carbon in Southern African Agroecosystems

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background Understanding the relative importance of climatic, edaphic, and management controls on soil organic carbon (SOC) is essential for improving SOC prediction and land management in data‐scarce agroecosystems. Aim This study quantified SOC drivers across Southern African agroecosystems using 655 observations covering climatic variables,
Samuel Ayodele Mesele, Abosede B. Babatunde, Andrei Rozanov, Ádám Csorba, Mary Steverink‐Mosugu   +4 more
wiley   +1 more source

Dental enamel hypoplasia and intra‐tooth isotope records as indicators of physiological stress and environmental variability in Early Pleistocene hippopotamids from Melka Kunture (Upper Awash, Ethiopia)

Journal of Quaternary Science, EarlyView.
ABSTRACT Enamel hypoplasia results from temporary disruptions of enamel deposition during tooth development. It is widely used as an indicator of physiological stress in archeological and paleontological contexts; yet, its relationship with environmental conditions during tooth formation remains poorly constrained.
Giuseppe Briatico, Denis Geraads, Rita T. Melis, Margherita Mussi   +3 more
wiley   +1 more source

Southern Portugal hydroclimate of the last millennium from near‐annually resolved speleothem records

Journal of Quaternary Science, EarlyView.
ABSTRACT Hydroclimate in Portugal is influenced by the North Atlantic subtropical high‐pressure system (the Azores High) and by internal climate modes, most prominently the North Atlantic Oscillation, which may shift in position and/or intensity due to anthropogenic climate change.
Alaina Chormann, Alan D. Wanamaker, Diana Thatcher, David P. Gillikin, Yemane Asmerom, Victor Polyak, Caroline C. Ummenhofer, Frederico Tátá Regala, Anouk Verheyden, Suzanne Ankerstjerne, Rhawn F. Denniston   +10 more
wiley   +1 more source

The Kernel Density Estimation Technique for Spatio-Temporal Distribution and Mapping of Rain Heights over South Africa: The Effects on Rain-Induced Attenuation

Atmosphere
The devastating effects of rain-induced attenuation on communication links operating above 10 GHz during rainy events can significantly degrade signal quality, leading to interruptions in service and reduced data throughput. Understanding the spatial and
Yusuf Babatunde Lawal, Pius Adewale Owolawi, Chunling Tu, Etienne Van Wyk, Joseph Sunday Ojo   +4 more
doaj   +1 more source

Gymnema sylvestre: Bioactive constituents, health benefits, and emerging applications in nutraceuticals and functional foods

JSFA reports, EarlyView.
Abstract Gymnema sylvestre (Retz.) R.Br. ex‐Schult., commonly known as “gurmar” or “sugar destroyer,” belongs to the Apocynaceae family and is traditionally used in Ayurveda for diabetes management. This review synthesizes ethnomedicinal evidence with contemporary pharmacological studies, to evaluate the therapeutic properties and mechanistic actions ...
Faiza Saeed, Muhammad Tauseef Sultan, Hassan Raza, Ahmad Mujtaba Noman, Nimra Haroon, Entessar Mohammad Al Jbawi   +5 more
wiley   +1 more source

On the frequency scaling of rain attenuation for space communications [PDF]

, 2009
Gremont, Boris, Boris C. Gremont
core   +1 more source

Salt‐induced nutritional and metabolic shifts in halophytes: implications for food security

Journal of the Science of Food and Agriculture, EarlyView.
Abstract Plant species vary in their response to salinity: some crops show a degree of salt tolerance, while halophytes – whether wild or cultivated – are characterized by a high capacity to thrive under saline conditions. Halophytes are considered a source of valuable secondary metabolites with potential economic value, yet they might also produce ...
Giulia Atzori, Pedro Garcia Caparros, Antonella Castagna, Luisa Custódio, Valentina Lazazzara, Claus Krogh Madsen, Felicia Menicucci, Maria João Rodrigues, Katalin Solymosi, Jose Ramon Acosta Motos   +9 more
wiley   +1 more source

Effective rain rate model for analysing overestimated rain fade in short millimetre-wave terrestrial links due to distance factor

Results in Engineering
Significant discrepancies have been observed between the measured attenuation induced by rain over mm-wave terrestrial links at very short communication paths and the predicted measurement by ITU-R P.530-18.
Asma Ali Budalal, Ibraheem Shayea, Md. Rafiqul Islam, Jafri Din, Abdulsamad Ebrahim Yahya, Yousef Ibrahim Daradkeh, Marwan Hadri Azmi   +6 more
doaj   +1 more source