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Single molecular layer and thin silicon beam enable nanolaser operation at room temperature
For the first time, researchers have built a nanolaser that uses only a single molecular layer, placed on a thin silicon beam, which operates at room temperature. The choice of two-dimensional materials and the silicon waveguide enabled the researchers to achieve room temperature operation. Excitons in molybdenum telluride emit in a wavelength that is transparent to silicon, making silicon possible as a waveguide or cavity material.
Supernova-hunting team finds comet with aid of amateur astronomer
Carnegie's Benjamin Shappee is part of a team of scientists, including an Australian amateur astronomer, which discovered a new comet last week. Jose Prieto, a former Carnegie postdoc now a professor at Universidad Diego Portales in Chile, was the first ASAS-SN team member to notice the bright, moving object. Checking the catalog of known moving objects-asteroids and comets-did not give any known object at the position of the source.
Researchers pioneer greener way to create interwoven polymers with blue light
Polymers, which are materials made from chains of molecules, are found in everything from food to clothing to cars. These chemistries independently are used in a broad range of applications, from dental composites, automobile bumpers to drug delivery materials, Shete said. They use 470-nanometer blue light, which is similar to blue LED light used to detect certain body fluids in crime scene investigations. This is unique in the way the blue light induces sequential reactions, says Kloxin.
Sewage system failures plague Mexican tourist destinations
Sewage breakdowns in Mexico City's floating gardens of Xochimilco and in the country's Yucatan peninsula resort of Isla Holbox have officials warning of threats to residents and tourism. Local media reported fecal material is building up in the low swampy ground around Holbox's failing sewage treatment plant. A video shows men in tall rubber boots trudging through the lush jungle, water filled with feces up to their knees.
F.D.A. Delays Rules That Would Have Limited E-Cigarettes on Market
Shares of cigarette makers tumbled after the morning announcement, but the companies issued careful statements in support of the FDA's move. The FDA will encourage companies to reduce nicotine levels in tobacco products to less addictive levels, Dr Gottlieb said. E-cigarettes come in many fruit and alcohol flavorings to appeal to vapers of all ages, with names like Tutti Frutti and Cupcake. At the same time, Mr Myers criticized the delay given to e-cigarette and cigar companies for complying with previously released rules.
Cricket's summer song making a comeback
The cheep, cheep, cheep of a cricket in the grass is the quintessential sound of summer. As I crunch over heathland in search of the elusive insect, the song fills the air, as if conjured up by a magician. The song of the field cricket was once a familiar soundtrack on the heaths and grasslands of south east England. Using a technique known as tickling, the young field crickets, known as nymphs, were tempted to leave their burrows and then captured.
Alarming New Animation Shows The Months Are Indeed Getting Warmer
Simply put, the animation illustrates how often a month reached certain temperatures over time. Taller peaks for each month's individual graph indicate that month hitting that temperature more often, while lower ones mean those temperatures were less frequent. As is evident by the slug-like plots inching to the right over time, the Earth's temperature is heating up. Here's a version of the graphic that illustrates the same warming trend in the context of broader seasonal temperature shifts.
Scientists Give a Chrysanthemum the Blues
It took Dr Noda and his colleagues years to create their blue chrysanthemum. They got close in 2013, engineering a bluer-colored one by splicing in a gene from Canterbury bells, which naturally make blue flowers. Some morning glories shift from blue upon opening to pink upon closing, as acidity levels in the plant fluctuate. Blue feathers, like those of the kingfisher, would be brown or gray without a special structural coating that reflects blue.
Scaramucci Did Not Invent the Word 'Paranoiac'
It is a real word, with a complex history. In fact, this is not the first time it has intersected with politics in a public way. Nearly a century ago it was invoked and a man - considered by many to be one of the most influential neurologists of his time - ended up dead. His name was Vladimir Mikhailovich Bekhterev and the person he described as paranoiac was Joseph Stalin. That's when the Russian doctor shared his diagnosis with a few acquaintances.
With indications that populations are declining, Australian scientists have embarked on an initiative to see how the platypus is faring.
The male has venomous spurs on the back of its mostly webbed feet. It lives a semiaquatic life in streams, rivers and ponds in Australia - the driest continent on Earth besides Antarctica. Until recently, the platypus wasn't something conservationists were much concerned about. With indications that populations were declining, the International Union for Conservation of Nature in 2016 updated the platypus's conservation status to near threatened.
Arizona aims to combat wrong-way driving with new technology
Arizona transportation officials are moving forward with a first-in-the-nation pilot program that will use thermal camera technology to curb the wrong-way driving problem plaguing the state. The detection system will illuminate a sign that notifies the wrong-way driver and immediately alert the state Department of Public Safety. Arizona Department of Transportation officials will update message boards along the interstate, cautioning other drivers of a wrong-way vehicle. Wrong-way drivers have killed at least eight deaths in Arizona this year.
Team manufactures magnets entirely from US-sourced rare earths
The Critical Materials Institute, a US Department of Energy Innovation Hub, has fabricated magnets made entirely of domestically sourced and refined rare-earth metals. In the global rare-earth metals market, the provenance is extraordinary- US-mined ores, domestically processed, and domestically manufactured into magnets. This was a stretch goal of the Critical Materials Institute, to demonstrate that rare-earth magnets could be produced from mine to manufacturer, here in the United States.
In solar eclipse's 'path of totality,' rooms go for $1,000 and vendors sell every trinket under the sun
The Great Solar Eclipse is coming, and there's money to be made. With more than 12 million people living in the so-called path of totality, and millions more traveling to see the historic Aug 21 solar eclipse, companies and enterprising individuals are sensing opportunity. Jonathan Frey, general manager of Frey wines, expects to sell out of the specialty wines before the eclipse. Most traditional lodging facilities have been booked for months if not years, leading people to jack up prices on Airbnb.
New NC island was expected to eventually disappear, but not like this
North Carolina's new island may not be an island much longer. Just a few weeks ago, visitors had to swim to the island in waters that got more than 6 feet deep at high tide. Meanwhile, Hallac is looking into who would have official ownership of Shelly Island once it's connected to the Cape Hatteras National Seashore. It was originally considered dangerous to visit the island, because the channel separating it from Hatteras Island was filled with swift waters, sharks and stingrays.
Scientists find moon of Saturn has chemical that could form 'membranes'
NASA scientists have definitively detected the chemical acrylonitrile in the atmosphere of Saturn's moon Titan, a place that has long intrigued scientists investigating the chemical precursors of life. Under the harsh conditions of Saturn's largest moon, this chemical is thought to be capable of forming stable, flexible structures similar to cell membranes. Now, NASA researchers have identified the chemical fingerprint of acrylonitrile in Titan data collected by the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile.
Computer models provide new understanding of sickle cell disease
Computer models developed by Brown University mathematicians show new details of what happens inside a red blood cell affected by sickle cell disease. Sickle cell disease affects hemoglobin, molecules within red blood cells responsible for transporting oxygen. The stiff, ill-shaped cells can become lodged in small capillaries throughout the body, leading to painful episodes known as sickle cell crisis. We are able to produce a polymerization profile for each of the cell types associated with the disease, Karniadakis said.
New light-activated catalyst grabs CO2 to make ingredients for fuel
Scientists have developed a light-activated material that can chemically convert carbon dioxide into carbon monoxide without generating unwanted byproducts. The achievement marks a significant step forward in developing technology that could help generate fuel and other energy-rich products using a solar-powered catalyst while mitigating levels of a potent greenhouse gas. In carbon dioxide reduction, you want to come away with one product, not a mix of different things.
Charlie Gard Dies, Leaving Legacy of Thorny Ethics Questions
On Thursday, Ms Yates, who works as a caregiver, said in statement that the hospital had denied us our final wish. Both the hospital and the parents in the Gard case dug in, and their arguments played out on Facebook and Twitter. The case also spurred questions about the wisdom of offering parents the hope of experimental treatment when faced with an incurable disease. The treatment had been tested on mice and on 18 people with a mutation in a gene known as TK2.
Why You Need To Try 'Forest Bathing,' Japan's Stress-Zapping Pastime
The first time you hear the term, you might assume forest bathing means splashing in a spring among some redwoods. Any time you can walk among trees without distractions or hurrying -- ideally for two hours or more -- counts as a bath in the forest. One forest bathing expert predicts that in 30 years, it'll be as much a cultural norm as yoga is now. From 2004 to 2012, the Japanese government heavily funded forest bathing research, Quartz reports.
Robot that dived into Washington, D.C., fountain not victim of 'foul play'
A security robot named STEVE that plunged into a Washington, DC, fountain while on patrol was not a victim of foul play and instead took a tumble after skidding on a loose brick surface, its manufacturer said on Friday. It is not commercially reasonable to be developed in constrained laboratory settings, Knightscope said in a statement. According to the company, STEVE has an extensive catalog of security capabilities and was mapping the grounds in order to be fully autonomous when the incident occurred.

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