The composition of the gut microbiome has been linked to countless areas of health. But could it really protect the gut against damage from radiotherapy treatment? Photo credit: Getty royalty-free.
A study of people in an intensive care unit has found that being in hospital can lead to harmful strains of bacteria taking over your microbiome.
Electric motorcycle and scooter design uses two or three wheel layouts outfitted with an electric motor and battery used for long distance travel, commuting and cruising.
an electric motorcycle concept based on dyson’s bladeless fans.
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Researchers at MIT and elsewhere have designed 3D printed mesh-like structures that morph from flat layers into predetermined shapes, in response to changes in ambient temperature. The new structures can transform into configurations that are more complex than what other shape-shifting materials and structures can achieve.
As a demonstration, the researchers printed a flat mesh that, when exposed to a certain temperature difference, deforms into the shape of a human face. They also designed a mesh embedded with conductive liquid metal, that curves into a dome to form an active antenna, the resonance frequency of which changes as it deforms.
The team’s new design method can be used to determine the specific pattern of flat mesh structures to print, given the material’s properties, in order to make the structure transform into a desired shape.
Rice University physicist Qimiao Si began mapping quantum criticality more than a decade ago, and he’s finally found a traveler that can traverse the final frontier.
The traveler is an alloy of cerium palladium and aluminum, and its journey is described in a study published online this week in Nature Physics by Si, a theoretical physicist and director of the Rice Center for Quantum Materials (RCQM), and colleagues in China, Germany and Japan.
Si’s map is a graph called a phase diagram, a tool that condensed-matter physicists often use to interpret what happens when a material changes phase, as when a solid block of ice melts into liquid water.
A team including evolutionary biologists from the University of Toronto (U of T) have identified the ways in which herbicide-resistant strains of an invasive weed named common waterhemp have emerged in fields of soy and corn in southwestern Ontario.
They found that the resistance—which was first detected in Ontario in 2010—has spread thanks to two mechanisms: first, pollen and seeds of resistant plants are physically dispersed by wind, water and other means; second, resistance has appeared through the spontaneous emergence of resistance mutations that then spread.
The researchers found evidence of both mechanisms by comparing the genomes of herbicide-resistant waterhemp plants from Midwestern U.S. farms with the genomes of plants from Southern Ontario.
The news: A gel developed by Stanford researchers could be sprayed on forests and vegetation to make them fire-resistant, helping to stop wildfires from spreading. It’s made from cellulose polymers (extracted from plants) and particles of silica, which are chemically identical to sand, mixed with a flame-retardant fluid.
How to use it: Fire-fighting sprays are currently used on wildfires only in emergencies: this new approach would deploy them protectively before any fires can break out. In a paper in Proceedings of the National Academy of Sciences, the researchers say the gel is nontoxic and biodegradable.
Rain-resistant: The team tested the gel on plants in the laboratory and then on patches of grass by a road in California, supervised by local firefighters. They found it can withstand wind and up to half an inch of rain, so iy only needs to be applied once per fire season (if it rains more than that, the risk of wildfires plummets anyway).
Tonight—just like every night—the pursuit of E.T. perseveres in Hat Creek, California.
There, in the midst of the Cascade Mountains, the faint buzz of the Allen Telescope Array hums on a secluded and scrubby field where jackrabbits wander and rattlesnakes roam.
Since 2007, the array’s 42 radio dishes have scanned the skies for signals from alien civilizations. Detecting one is the longest of long shots. So far, nothing suggesting an extraterrestrial intelligence has been found. Here at Hat Creek, a close encounter with a bear seems more likely.
This new breed of city takes various different forms, from government initiatives, to public-private partnerships, to entirely private enterprises. Many are being used to jump-start economies in the developing world, with masterplans carefully calibrated to attract foreign investors and treasuries looking to sink their funds into something concrete. They provide a powerful means for wealthy countries to expand their strategic influence abroad, with the construction of new cities acting as a form of “debt-trap diplomacy”, tying host nations into impossibly burdensome deals. They are billed as a panacea for the world’s urban ills, solving overcrowding, congestion and pollution; yet, more often than not, they turn out to be catalysts for land dispossession, environmental degradation and social inequality.
The feature Kim enjoys most is a small touchscreen display on his kitchen wall that allows him to keep track of his and his wife’s consumption of electricity, water and gas and, most important, compare it against the average statistics for the building. Flicking between the screens of bar charts and graphs, a broad grin spreads across his face: for yet another day running, they are more energy-efficient than all their neighbours.
From their living room window at the top of one of the city’s new residential towers, a panorama of downtown Songdo unfolds. Across an eight-lane highway lies Central Park, a broad swath of trees surrounding an ornamental lake, flanked by rows of glass towers with vaguely jaunty silhouettes. Armies of identikit concrete apartment blocks march into the hazy distance beyond, terminating at a Jack Nicklaus-designed golf course. It looks a lot like many other modern Asian cities, a place of generic towers rising above a car-dominated grid. Public life is mostly confined to the air-conditioned environments of malls and private leisure clubs.
Initiated by the South Korean government in the late 1990s, when Incheon airport was being planned, Songdo represents a model that has been replicated numerous times around the world. Begun as a joint venture with US developer Gale International – which has since hawked its “city in a box” kit to other countries – the Songdo International Business District was conceived as a $40bn hub for international companies, an exemplar of sustainable urbanism and testing ground for new smart city technologies.