Permeable concrete

Pervious concrete (also called porous concrete, permeable concrete, no fines concrete and porous pavement) is a special type of concrete with a high porosity used for concrete flatworkapplications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater recharge.

Pervious concrete is made using large aggregates with little to no fine aggregates. The concrete paste then coats the aggregates and allows water to pass through the concrete slab. Pervious concrete is traditionally used in parking areas, areas with light traffic, residential streets, pedestrian walkways, and greenhouses. It is an important application for sustainableconstruction and is one of many low impact development techniques used by builders to protect water quality.

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Does practice really makes the man perfect?

Hours of practice isn't guaranteed to turn you into an expert. Sorry to bust your dreams here, scientists have debunked the myth once and for all, and shown that, while some people can become an expert with 10,000 hours of practice - or less - many can't, and there's a whole lot more involved than just hard work.

The researchers came to this conclusion after analysing data taken across six previous studies of chess competitions (1,082 subjects in total) and eight studies of musicians (628 subjects), and looking for any kind of correlation between practice and success. What they found was that, well, there kinda wasn't one, and there were huge variations in how much of a role practice seemed to have played in success.

"One chess player, for example, had taken 26 years to reach a level that another reached in a mere two years. Clearly, there's more at work than just the sheer volume of hours practiced, the study argues."

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Hydrogen powered Tram

Liang Jianying, chief engineer of Sifang Co, a wholly-owned subsidiary of China South Rail Corporation, said on Thursday the new tram is the only hydrogen powered vehicle in the field and makes China the only country to have mastered the technology. 

Hydrogen fuel cells are a new clean energy source, widely used in the automobile industry, but lagging behind in the field of rail transit. "It took two years for Sifang to solve key technological problems, with the help of research institutions," state-run Xinhua news agency quoted Liang as saying without mentioning when the tram would be operational. 

The tram can be refilled with hydrogen in three minutes and can then run for 100km at speeds as high as 70 kmph. "The average distance of tramcar lines in China is about 15km, which means one refill for our tram is enough for three round trips," Liang said, adding the overall running costs will be greatly reduced. Each tram has over 60 seats and can carry 380 passengers.

Is Poverty Genetic?

Why do poor children perform worse in school? A researcher looks into this and finds physical differences between the brains of the rich and the poor but children aren't born with these differences.

Or money is just a simple human creation to which we give more preference than any other thing in this universe. If we scale the happiness of Bill Gates and an average person, then average person is more happier than him in most of the cases. Are we earning to be happy?