Science & Health
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Researchers: Fast Radio Bursts Could Power Alien Spaceships

Extremely brief but powerful radio bursts coming from billions of light years away could be evidence of an advanced alien civilization, according to a new paper.

Fast radio bursts, which are “millisecond-long flashes of radio emission” could be “leakage” from “planet-sized transmitters” that power alien spaceships over incredible distances.

“Fast radio bursts are exceedingly bright given their short duration and origin at great distances, and we haven’t identified a possible natural source with any confidence,” said theorist Avi Loeb of the Harvard-Smithsonian Center for Astrophysics. “An artificial origin is worth contemplating and checking.”

The bursts were first observed in 2007, and so far, fewer than two dozen have been detected using massive radio telescopes. They appear to originate from galaxies billions of light years away, researchers said.

For the paper, researchers tried to assess the feasibility of creating massive transmitters, determining that while it would be well beyond our technology, it would be within the realm of possibility, according to the laws of physics.

They also investigated whether such a device would be viable from an “engineering perspective,” with particular focus on how something that would need such massive amounts of energy would not melt. They said “a water-cooled device twice the size of Earth could withstand the heat.”

Researchers theorize that the use of such massive radio transmitters could be to power “interstellar light sails.” The power would be enough to push a ship of a million tons or about the same as 20 large cruise ships here on Earth.

“That’s big enough to carry living passengers across interstellar or even intergalactic distances,” said co-author Manasvi Lingam, also of Harvard.

In order to do that, the beam of energy would need to be focused constantly on the would-be ship. The reason we may only observe brief flashes here on Earth is that the “host planet, star and galaxy are all moving relative to us. As a result, the beam sweeps across the sky and only points in our direction for a moment.”

The paper was published in the Astrophysical Journal Letters.

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Economy & business
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South African Taxi Drivers Hold Airport Protest Against Uber

South African taxi drivers on Friday blocked roads around Johannesburg’s main international airport to protest against ride-hailing company Uber, causing some passengers to miss their flights.

The protest by drivers with metered cabs, who say Uber unfairly siphons business from them, caused morning traffic jams on two highways near O.R. Tambo International Airport. Police later cleared the roads.

The impact of the blockade will continue “to be felt throughout the day due to earlier delays, particularly on flights that need to return to O. R. Tambo International Airport,” Airports Company South Africa, which manages the airport, said in a statement. “Airlines have informed the airport that passengers that missed flights in the morning are being accommodated on other flights.”

South African Airways urged passengers to arrive at the airport earlier than usual, even if they planned to fly later in the day.

In a statement, Uber said many South African drivers with metered taxis are also picking up customers with its ride-hailing app.

“Our technology is open and pro-choice and we are keen to offer it to a broad number of taxi drivers to boost their chances for profit,” said Uber, adding that threats and intimidation toward Uber drivers are unacceptable.

Meanwhile, some Uber drivers protested outside the company’s Johannesburg office on Friday, local media reported. That group of protesters reportedly said Uber does not do enough to address their safety concerns.

Taxi drivers in some other countries also have protested, sometimes violently, against Uber because of concerns over allegedly unfair competition.

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Economy & business
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US Unemployment Drops Slightly; Economy Gains 235K Jobs

The U.S. economy had a net gain of 235,000 jobs in February, while the unemployment rate fell one-tenth of a percent to 4.7 percent.

Friday’s report from the Labor Department was stronger than most economists expected. Some experts say it takes around 100,000 jobs a month to accommodate new entrants to the work force.  

A survey of accountants who manage companies across the nation shows firms “are now looking to expand,” according to Ash Noah of AICPA. He tells VOA there is “pent-up” demand for labor.

Job gains were seen in private education, manufacturing, health care, mining and construction. The Associated General Contractors of America said construction employment jumped by the largest number since 2008. The National Council of La Raza said the construction hiring may have helped cut the unemployment rate for Latinos to 5.6 percent. 

On Twitter, White House Press Secretary Sean Spicer called the report “Great news for American workers.” Since President Donald Trump has previously called official jobless numbers “phony” and “complete fiction,” Spicer joked with reporters that the figures may have been “phony in the past, but they are very real now.”

WATCH: Jobs Report ‘Real Now,’ Spicer Says

The tight job market means companies may have to start raising wages to attract and keep the best workers. Friday’s report said wages rose about 2.8 percent over the past year, which is a stronger gain than the previous month, and stronger than inflation.  

Top officials of the U.S. central bank have said they are watching the labor market closely, and the strong report may encourage them to raise interest rates. The Federal Reserve meets next week to debate interest-rate policy, and is scheduled to make an announcement Wednesday.

PNC Bank economist Gus Faucher says rates will go up one-quarter of one percent because the labor market is where the Fed “wants it to be.” Officials slashed rates to near zero during the recession to boost growth and fight unemployment.  

While the latest job data is stronger than expected, it also shows that 7.5 million Americans are still unemployed. Another 5.7 million who want to work full-time can only find part-time employment. The government figures count people as unemployed if they are available for work and tried to find a job sometime in the past four weeks. The figures do not count as officially unemployed those who stay home to raise children, those who are enrolled in school or those who have retired.

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Silicon Valley & Technology
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Alleged CIA Hacking Techniques Lay Out Online Vulnerability 

If this week’s WikiLeaks document dump is genuine, it includes a CIA list of the many and varied ways the electronic device in your hand, in your car, and in your home can be used to hack your life.

It’s simply more proof that, “it’s not a matter of if you’ll get hacked, but when you’ll get hacked.” That may be every security expert’s favorite quote, and unfortunately they say it’s true. The WikiLeaks releases include confidential documents the group says exposes “the entire hacking capacity of the CIA.”

The CIA has refused to confirm the authenticity of the documents, which allege the agency has the tools to hack into smartphones and some televisions, allowing it to remotely spy on people through microphones on the devices.

Watch: New Generation of Hackable Internet Devices May Always Be Listening

WikiLeaks also claimed the CIA managed to compromise both Apple and Android smartphones, allowing their officers to bypass the encryption on popular services such as Signal, WhatsApp and Telegram.

For some of the regular tech users, news of the leaks and the hacking techniques just confirms what they already knew. When we’re wired 24-7, we are vulnerable.

“The expectation for privacy has been reduced, I think,” Chris Coletta said, “… in society, with things like WikiLeaks, the Snowden revelations … I don’t know, maybe I’m cynical and just consider it to be inevitable, but that’s really the direction things are going.”

The internet of things

The problem is becoming even more dangerous as new, wired gadgets find their way into our homes, equipped with microphones and cameras that may always be listening and watching.

One of the WikiLeaks documents suggests the microphones in Samsung smart TV’s can be hacked and used to listen in on conversations, even when the TV is turned off.

Security experts say it is important to understand that in many cases, the growing number of wired devices in your home may be listening all the time.

“We have sensors in our phones, in our televisions, in Amazon Echo devices, in our vehicles,” said Clifford Neuman, the director of the Center for Computer Systems Security, at the University of Southern California. “And really almost all of these attacks are things that are modifying the software that has access to those sensors, so that the information is directed to other locations. Security practitioners have known that this is a problem for a long time.”

Neuman says hackers are using the things that make our tech so convenient against us.

“Certain pieces of software and certain pieces of hardware have been criticized because, for example, microphones might be always on,” he said. “But it is the kind of thing that we’re demanding as consumers, and we just need to be more aware that the information that is collected for one purpose can very easily be redirected for others.”

Tools of the espionage trade

The WikiLeaks release is especially damaging because it may have laid bare a number of U.S. surveillance techniques. The New York Times says the documents it examined lay out programs called “Wrecking Crew” for instance, which “explains how to crash a targeted computer, and another tells how to steal passwords using the autocomplete function on Internet Explorer.”

Steve Grobman, chief of the Intel Security Group, says that’s bad not only because it can be done, but also because so-called “bad actors” now know it can be done. Soon enough, he warns, we could find our own espionage tools being used against us.

“We also do need to recognize the precedents we set, so, as offensive cyber capabilities are used … they do give the blueprint for how that attack took place. And bad actors can then learn from that,” he said.

So how can tech-savvy consumers remain safe? Security experts say they can’t, and to remember the “it’s not if, but when” rule of hacking.

The best bet is to always be aware that if you’re online, you’re vulnerable.

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Silicon Valley & Technology
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US Solar Soared in 2016, But Investors Still Leery

New U.S. solar installations nearly doubled last year, but slowing demand for both residential and large-scale systems, falling panel prices and concerns about looming federal tax reform are still dampening investor appetite for the sector.

Solar installations soared 97 percent to 14.8 gigawatts in 2016, according to a report released Thursday by Wood Mackenzie and the Solar Energy Industries Association. The technology is cheaper than ever, with panel prices dropping 40 percent last year, and many utilities procuring solar on the basis of cost alone.

But the dramatic drop in panel prices has hampered solar manufacturers’ profits and ramped up competition for utility-scale contracts among developers, companies said in recent weeks while reporting fourth-quarter results. Add in a slowdown in the residential market, tax reform pushed by U.S. President Donald Trump, climbing interest rates and falling oil prices, and stock market investors remain skittish about solar.

2017 a transition year

Credit Suisse analyst Andrew Hughes said in a client note on Thursday that the key risk to his “outperform” rating on shares of residential solar player Sunrun was “investor sentiment, which in a rising interest rate and falling oil price market obscured by tax policy uncertainty remains tepid.”

The MAC Global Solar Energy index, which tracks shares of solar power companies, slid 43 percent in 2016. The index has recovered to gain nearly 8 percent so far this year but remains 65 percent below its year-ago level.

U.S. module manufacturers and project developers SunPower and First Solar Inc are both viewing 2017 as a transition year for their businesses, they said after reporting in February losses for the fourth quarter of last year.

SunPower Chief Executive Tom Werner in a conference call predicted “intense competition for the forseeable future in mainstream power plants,” adding that some companies were selling panels at below cash cost.

A slowdown is forecast

Indeed, the solar industry report released Thursday forecasts a slowdown in the market this year after last year’s boom. Utility systems accounted for more than 10.5 GW of the total in 2016, but are not expected to exceed 10 GW again until 2021, the report said.

The 2016 boom was largely due to a rush by developers to claim a federal tax credit for solar systems that had been expected to expire at the end of the year. The five-year extension of that credit, however, has allowed projects to be pushed into this year and beyond.

Though Trump has not called for ending tax credits for solar and other renewable energy, he has expressed doubts about the role of clean power sources.

Home installations are growing

On the solar residential side, installations grew 19 percent to 2.6 GW last year, down from 66 percent growth in 2015. Growth has slowed in major markets like California, where many of the households most interested in solar have already put up panels.

Tesla, which acquired residential market leader SolarCity late last year, said last month that it deployed 201 megawatts of solar in the fourth quarter, a more than 20 percent drop from the same period a year earlier.

SolarCity rival Sunrun reported a quarterly profit that topped Wall Street estimates due to cost cuts, but said growth would be substantially slower in 2016. System deployments rose 40 percent in 2016, but are expected to rise just 15 percent this year, Sunrun said.

“While it may be slowing, it is still growing. That is an important piece of the story,” Abigail Ross Hopper, president of the Solar Energy Industries Association, said in an interview. “Some of that resetting is to be expected.”

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Science & Health
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Monitoring Droughts’ Movements Would Aid Vulnerable Areas, Researchers Say

It’s a major natural disaster that slowly grows in one place and then moves across a region, gaining intensity and size. As it spreads, it destroys land, ruins agriculture and tears apart communities, and it can kill people.

It’s a drought.

Researchers are just beginning to view droughts as this type of dynamic force, and some hope that soon they will be monitored similarly to hurricanes — with scientists able to predict their development, helping to protect those living in their path.

Ten percent of droughts travel between 1,400 to 3,100 kilometers from where they begin, according to a recent study. The study, which analyzed 1,420 droughts between 1979 and 2009, identified “hot spots” around the world and common directions in which droughts move.

Some droughts in the southwest United States, for example, tend to move from south to north. In Argentina, they usually migrate the opposite direction. In Central Africa, droughts tend to go southeastern toward the coast.

“It can start somewhere, move throughout the continent, and obviously cause harm throughout its way,” Julio Herrera-Estrada, a doctoral candidate at Princeton University and leader of the study, said Thursday.

Droughts that travel are usually the largest and most disastrous, the scientists found. They can cause a loss of agriculture, wildlife, wetlands and human life, according to the National Drought Mitigation Center in Lincoln, Nebraska.

Very costly

They are also one of the most expensive natural disasters that people face today, according to Herrera-Estrada, who collaborated on the study with the International Institute for Applied Systems Analysis in Vienna.

The most recent moving drought that Herrera-Estrada studied began in 2008 in Ukraine and Russia, and moved 1,700 kilometers northeast, ending in northwest Russia and affecting parts of Kazakhstan on the way. It lasted almost a year.

“People haven’t really thought of droughts in this way,” he told the Thomson Reuters Foundation.

Future research, Herrera-Estrada said, can shed light on what mechanisms cause some droughts to move and what affects their paths. This can be done accurately, however, only through collaboration among national governments, he said.

“It’s important to have a global or a continental understanding about how droughts are behaving,” he said. Collaboration “benefits people on the ground, farmers, cities that need water, power plants that need water.”

The study was published last week in the journal Geophysical Research Letters.   

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