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Este estudio, realizado por ingenieros de la Universidad de Sheffield, es el primero en demostrar, de manera concluyente, que los contaminantes pueden entrar en las tuberías a través de filtraciones y ser transportado a través de la red de tuberías.

La presión en las tuberías de agua generalmente obliga al agua a salir través de las fugas, previniendo que cualquier otra cosa entre al sistema. Pero cuando hay una caída de presión... 

A new research study has called for an overhaul of the way mobile devices are manufactured and contracted, in order to stop the harmful effects on the environment caused by current business models. Researchers from the University of Surrey analysed studies on the lifespan of mobile devices, from manufacture, use and disposal to see what impact each stage had on the environment. Through their investigation, they concluded that the current mobile business model, driven by frequent upgrades, is costing both the manufacturer and the environment. 

The first grid-connected wave energy device in North American waters started feeding renewable electricity to a Marine Corps base in Hawaii last week. In coordination with the U.S. Navy, Northwest Energy Innovations and the Energy Department brought online a prototype of the Azura wave energy converter (WEC) device. The one-of-a-kind, wave energy device is designed to generate electricity from the motion of the choppy waters at the Navy’s Wave Energy Test Site (WETS) in Kaneohe Bay on Oahu. 

The study, by engineers at the University of Sheffield, is the first to prove conclusively that contaminants can enter pipes through leaks and be transported through the pipe network.

The pressure in mains water pipes usually forces water out through leaks, preventing anything else from getting in. But when there is a significant pressure drop in a damaged section of pipe, water surrounding the pipe can be sucked in through the hole. 

Evolutionary theorist Stephen Jay Gould is famous for describing the evolution of humans and other conscious beings as a chance accident of history. If we could go back millions of years and "run the tape of life again," he mused, evolution would follow a different path. 

A study by University of Pennsylvania biologists now provides evidence Gould was correct, at the molecular level: Evolution is both unpredictable and irreversible. Using simulations of an evolving protein, they show that the genetic mutations that are accepted by evolution are typically dependent on mutations that came before, and the mutations that are accepted become increasingly difficult to reverse as time goes on.