Tag: National Academy of Sciences

  • Oil drilling in the Gulf is safer, but there is still a cause for worry

    Oil drilling in the Gulf is safer, but there is still a cause for worry

    A new study by the National Academy of Sciences found that although regulators and industry have reduced some risks associated with deep water exploration in the gulf 13 years after the massive Deepwater Horizons spill contaminated the Gulf of Mexico, some problematic safety issues still exist.

    According to the report released on Tuesday, the establishment of a dedicated federal agency for offshore oil drilling safety, the development of an industry-wide safety centre, and new technology have all reduced risks.

    However, given that 80% of workers are contractors on rigs, federal inspectors continue to have little control over them.

    The report also worried about the lack of an industrywide safety culture that integrates accident prevention into everyday work.

    “There are a lot of things that are happening that are really good, but the industry is not at a place″ where it should be, said panel chairman Richard Sears.

    He was a longtime Shell executive who was the chief technical adviser to the federal panel that initially investigated the 2010 explosion on the BP rig that killed 11 people and caused America’s biggest oil spill — more than 130 million gallons.

    A culture that gave lip service to safety but didn’t really integrate it into the way it does business was part of the problem with the accident, Sears and others said. Some companies are treating safety the proper way — including giving flash bonuses to workers who stopped drilling because of potential dangers — but others “that don’t seem to get it,” he said.

    “They have not figured out how to naturally embrace safety in particular… in who they are and what they do” but instead treat it like a box to check off, Sears said.

    That’s far different from the more uniform industrywide safety culture seen in commercial airlines and nuclear power plants, he said.

    There’s a “long list” of specifics on safety culture process that “other high-risk industries” like aviation, have done but the drillers have not, said Steve Murawski, a University of South Florida marine ecologist who was a top NOAA scientist during the spill.

    Federal safety inspectors lost a court case giving them power to directly regulate contractors so when they find a problem on an offshore rig they can ding the operator but not the contractor who is actually creating the problem, Sears said.

    It’s then up to the operator to crack down on the contractor, and it becomes complicated and not as effective, he said.

    The report said that was one of the problems on the Deepwater Horizons rig.

    Murawski, who wasn’t part of the study team, said the report highlights many of the recommendations that still haven’t been put into effect 13 years after that disaster, especially changes to a key oil spill law.

    He also said the report shows the need for greater transparency into industry actions.

    Another outside scientist involved in the spill, Christopher Reddy of the Woods Hole Oceanographic Institution, said he was impressed by “the amount of positive change since 2010” but then that was offset by the safety culture issue.

    The oil and natural gas industry and the federal government have together taken great strides to enhance the safety of offshore drilling operations,” American Petroleum Institute Vice President Holly Hopkins said.

    National Academy President Marcia McNutt, who was a top Obama administration official dealing with the spill in 2010, said her concern is that officials are preparing for the last disaster, not the next one.

    Still, McNutt said, the public should find the report “at least partially reassuring that this isn’t high school or elementary school shootings in terms of sticking your head in the sand and ignoring the problem.”

  • Study explores how brain solidifies memories during sleep

    A computer model of the brain reveals that, during deep sleep cycles, the hippocampus is teaching the neocortex what it learned during the events of the previous day, a new study shows.

    It’s a question many have asked: How are memories made to last?Now, a new study claims they are solidified during sleep through the interplay of two distinct brain regions.Memories are set in the brain as it cycles between slow-wave and rapid eye movement (REM) sleep, which happens about five times a night, researchers report in the Monday issue of the Proceedings of the National Academy of Sciences.

    A computer model of the brain reveals that, during those deep sleep cycles, the hippocampus is teaching the neocortex what it learned during the events of the previous day, the scientists said.

    The hippocampus is the brain’s center for new memories, and is tasked with picking up day-to-day information, the researchers explained. The neocortex is responsible for language, higher-end brain processing and more permanent memory storage.

    Sleep simulations showed that during slow-wave sleep, the hippocampus guides the brain to revisit recent incidents and data. During REM sleep, the neocortex’s memory storage mostly reruns those revisited events.

    “As the two brain regions connect during non-REM sleep, that’s when the hippocampus is actually teaching the neocortex,” said co-researcher Dhairyya Singh, a second-year doctoral student with the University of Pennsylvania (UPenn). “Then, during the REM phase, the neocortex reactivates and can replay what it already knows,” solidifying the data in long-term memory.

    The alternating phases are important because if the neocortex doesn’t have a chance to replay its own information, then the potential memory gets overwritten, Singh said.

    The findings are consistent with what’s known about sleep and memory, but UPenn neuroscientist and study co-author Anna Schapiro noted that aspects of the computer model are still theoretical.

    “We still need to test this,” Schapiro said in a university news release. “One of our next steps will be to run experiments to understand whether REM sleep is truly bringing up old memories and what implications that might have for integrating new information into your existing knowledge.”

  • Scientists believe there are 20,000,000,000,000,000 ants on earth

    Scientists believe that a whopping 20,000,000,000,000,000 (20 quadrillion) ants live on Earth — and that’s just a conservative estimate.

    The Proceedings of the National Academy of Sciences (PNAS) revealed its stunning findings in a paper released Monday highlighting new insight into the insects’ population, which scientists know little about.

    The Earth’s ant population is believed to have a total biomass of ∼12 megatons of dry carbon, which “exceeds the combined biomass of wild birds and mammals,” per the paper.

    The scientists from the University of Hong Kong assessed 489 global studies as part of their research into the global ant population as they look to expand the world’s breadth of knowledge on the insects.

    Patrick Schultheiss, a lead author on the study who works as a researcher at the University of Würzburg in Germany, described the findings as “unimaginable” in an interview with the Washington Post.

    “We simply cannot imagine 20 quadrillion ants in one pile, for example,” Schultheiss told the outlet. “It just doesn’t work.”

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    The global ant population “is distributed unevenly” across Earth, according to PNAS. The tropics are home to the most ants, though they can be found in various environments.

    Leaf-litter ants are most common in forests, while ground-foraging ants are currently highest in dry, desert-like regions, per Monday’s paper. Ground-dwelling ants, meanwhile, are largely found in tropical and subtropical regions.

    Information about insects’ abundance has been “is currently lacking,” despite them being a “fundamental” part of understanding how ecosystems function.

    The new study not only emphasizes “the central role ants play” in our ecosystems, but also addresses the “major ecological and geographic gaps” in humans’ knowledge of these insects, PNAS said.

    “Our results provide a crucial baseline for exploring environmental drivers of ant-abundance patterns and for tracking the responses of insects to environmental change,” they added.