The experimental validation of an efficient iterative technique for compensating known position errors in a spherical near to far-field transformation (NTFFT) for elongated antennas using a minimum number of near-field (NF) measurements has been provided. This transformation exploits a non-redundant sampling representation of the voltage detected by the probe obtained by modeling a long antenna with a prolate ellipsoid.
Researchers in Germany find that streetlights near waterways attract flying insects from the water and change the predator community living in the grass beneath the lights. The findings show that artificial night-time lighting could have implications for the surrounding ecosystem and biodiversity, which should be considered when designing new lighting concepts.
America's white working-class communities feel they are being kept in the 'slow lane' of social mobility while other groups speed past, according to a year-long study by UK and US researchers into their social and political views. Communities in five cities were interviewed and their thoughts captured during a period spanning part of the 2016 presidential race, which heralded the most dramatic shift in political dynamics in recent US history.
Sprawling mining operations in Brazil have caused roughly 10 percent of all Amazon rainforest deforestation between 2005 and 2015 -- much higher than previous estimates -- says the first comprehensive study of mining deforestation in the iconic tropical rainforest. Surprisingly, the majority of mining deforestation (a full 90 percent) occurred outside the mining leases granted by Brazil's government, the new study in Nature Communications finds.
Conservationists can be 'cautiously optimistic' about the prospect of sustainable subsistence hunting by Amazonian communities -- according to new research from the University of East Anglia (UK). The research team spent over a year working with 60 Amazonian communities and hiked for miles through trackless forests to deploy nearly 400 motion-activated camera traps -- in a bid to understand which species are depleted by hunting and where.
In a new study, environmental social scientists worked with indiginous people in the rural Peruvian Amazon and determined that local people meet their basic needs through diverse subsistence activities, such as hunting, fishing, and farming, and over centuries they have developed sophisticated natural resource management systems that protect the robust rainforest ecosystem. Through the study, the scientists hope to overturn traditional notions about development and industrialization.
For decades municipal and regional governments have used various traffic management strategies to reduce vehicle emissions, alongside advancements like cleaner fuel and greener cars. But not all traffic management strategies are created equal, says UBC transportation expert and civil engineering professor Alexander Bigazzi. After reviewing more than 60 studies on the subject, Bigazzi has concluded that road pricing -- or pay per use -- is the most effective strategy to reduce emissions and traffic.
A study published in Environment International has demonstrated that exposure to air pollution on the way to school can have damaging effects on children's cognitive development. The study, led by the Barcelona Institute for Global Health, found an association between a reduction in working memory and exposure to fine particulate matter (PM2.5) and black carbon during the walking commute to and from school.
House sparrows are well-adapted to living in urban areas, so it is surprising their numbers have fallen significantly over the past decades. An investigation by Spanish researchers into this worrying trend, published in open-access journal Frontiers in Ecology and Evolution, finds that sparrows living in urban areas are adversely affected by pollution and poor nutrition. The study also finds the birds suffer more during the breeding season, when resources are needed to produce healthy eggs.
Nearly 40 percent of the uninsured population in America lives in the suburbs and nearly one in seven suburban residents lacks health insurance.