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Re: Science News
A Learning Secret: Don’t Take Notes with a Laptop
Students who used longhand remembered more and had a deeper understanding of the material
Jun 3, 2014 |By Cindi May
The old fashioned way works better.
Credit: Szepy via iStock
“More is better.” From the number of gigs in a cellular data plan to the horsepower in a pickup truck, this mantra is ubiquitous in American culture. When it comes to college students, the belief that more is better may underlie their widely-held view that laptops in the classroom enhance their academic performance. Laptops do in fact allow students to do more, like engage in online activities and demonstrations, collaborate more easily on papers and projects, access information from the internet, and take more notes. Indeed, because students can type significantly faster than they can write, those who use laptops in the classroom tend to take more notes than those who write out their notes by hand. Moreover, when students ...
More on http://www.scientificamerican.com/ar...SA_MB_20140604
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Re: Science News
Doubt Grows about Gravitational Waves Detection
Two analyses suggest that the signal of big bang ripples announced earlier this year was too weak to be significant
Jun 2, 2014 |By Ron Cowen and Nature magazine
Preliminary data from the Planck probe on how galactic dust scatters microwave radiation, presented at an April 2013 meeting, are now being used to evaluate the strength of signals from the primordial Universe.
Credit: Planck Collaboration (ESLAB2013)
The astronomers who this spring announced that they had evidence of primordial gravitational waves jumped the gun because they did not take into proper account a confounding effect of galactic dust, two new analyses suggest. Although further observations may yet find the signal to emerge from the noise, independent experts now say they no longer believe that the original data constituted significant evidence.
Researchers said in March that they had found a faint twisting pattern in the polarization of the cosmic microwave background (CMB), the Big Bang’s afterglow, using a South Pole-based radio telescope called BICEP2. This pattern, they said, was evidence for primordial gravitational waves, ripples in the fabric of space-time generated in the early Universe (see 'Telescope captures view of gravitational waves'). The announcement caused a sensation because ...
More on http://www.scientificamerican.com/ar...A_SPC_20140605
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Re: Science News
Politics Derail Science on Arsenic, Endangering Public Health
A ban on arsenic-containing pesticides was lifted after a lawmaker disrupted a scientific assessment by the EPA
Jun 30, 2014 |By David Heath and Center for Public Integrity
Wendy Brennan's granddaughter, Abigail Begin, near the family's water well.
Credit: Amy Temple
This story was published by The Center for Public Integrity, a nonprofit, nonpartisan investigative news organization in Washington, D.C. It is part of a collaboration among the Center for Public Integrity, Center for Investigative Reporting and Michigan Radio. It was featured on Reveal, a new program from the Center for Investigative Reporting and PRX.
MOUNT VERNON, Maine—Living in the lush, wooded countryside with fresh New England air, Wendy Brennan never imagined her family might be consuming poison every day. But when she signed up for a research ...
More on http://www.scientificamerican.com/ar..._HLTH_20140701
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Re: Science News
Cross-Border Ebola Outbreak a First for Deadly Virus
Weeks ahead remain fraught with uncertainty as pathogen jumps borders and appears in Africa’s largest city
Jul 30, 2014 |By Dina Fine Maron
William Fischer pictured in front of temporary Ebola treatment center in Guinea.
Credit: Andreas Kurth, courtesy of Fischer
When the physicians found the nine-year-old boy he was scared and barely had a pulse. He had been locked in a house with his mother for four days by community members in a corner of southwest Guinea, the hotbed of Africa’s current Ebola crisis.
The boy’s neighbors were frightened of contracting the virus that causes the highly lethal illness (which kills between 50 and 90 percent of its victims) and did not want to risk coming into contact with either of them.
By the time that Doctors Without Borders came upon their village ...
More on http://www.scientificamerican.com/ar...A_EVO_20140804
When Will We Have a Vaccine for Ebola Virus?
The deadly Ebola outbreak in west Africa highlights the urgent need for a vaccine, and researchers say one may be available in a few years
Jul 29, 2014 |By Annie Sneed
Color-enhanced electron micrograph of Ebola virus particles
Credit: Wikimedia Commons/PLoS Pathogens
The latest outbreak of Ebola virus in west Africa is the worst ever—as of Monday, it had infected more than 1,200 people and claimed at least 672 victims since this spring. Guinea, Liberia and Sierra Leone all have confirmed cases. An official at Doctors Without Borders has declared the outbreak as “totally out of control,” according to NBC News. Unfortunately, doctors have no effective vaccines or therapies. Health care workers can only attempt to support patients’ immune systems (regulating fluids, oxygen levels, blood pressure and treating other infections) to help the afflicted fight off the virus as best they can.
A vaccine to help battle future Ebola outbreaks may be just a few years away, however. During the past decade researchers have ...
More on http://www.scientificamerican.com/ar...SA_SP_20140804
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