Saturday, February 08, 2020

A study shows growth trends in female homicide victims in Spain spanning over a century

by Universitat Oberta de Catalunya (UOC)

In a groundbreaking study, research carried out between the Universitat Oberta de Catalunya (UOC) and the University of Lausanne (UNIL, Switzerland) has compiled data on homicide victims in Spain, disaggregated by gender, from 1910 to 2014. Unlike previous studies, which have focused on particular regions of the country or shorter time periods, this study gathers and analyses data corresponding to more than a century in Spain. Although it takes a look at both male and female victimization, the analysis has centred particularly on female victims. Among its most salient results, the analysis shows an increase in female homicide victims starting in the 1960s and associates it with the evolution of women's role and status in society.

The study "Female Homicide Victimization in Spain from 1910 to 2014: the Price of Equality?", published in the European Journal on Criminal Policy and Research, is the work of Antonia Linde, director of the UOC Bachelor's Degree in Criminology. Linde studied the documentation in depth and analysed the trends in female homicide victimization, irrespective of the gender of the perpetrator. In other words, the data used include women who have been victims of homicides committed by both men and women. "This is because there are no public data available on female homicide victims in which the perpetrator's sex is specified until the late 1990s," said the researcher.

Female homicide mortality does not follow a steady line over the century; the study identifies an upward trend starting in the 1960s. It was in this decade that women's daily routines started a process of rapid change. Women began to spend more time out of the home, either studying or working, and remained single and childless until later ages. And it is also from this decade that the likelihood of becoming homicide victims increases. "These new activities would have increased their exposure to the risk of victimization (they spend more time out of the home, they interact with more people, etc)", Linde pointed out.

Evolution of women's role and status in Spain

The study reveals associations between the evolution of female homicide victims and six indicators of women's role and social status in Spain: enrolment in higher education, entry in the job market, average age when the first child is born, marriage, divorce and abortion.

The data reveal that, starting in the 1960s, the number of women enrolled in higher education institutions increased very significantly. In 1915-1916, women accounted for 2% of the total student population; by the early 1960s, this percentage had increased to 25% and, from the 1980s onwards, there were more female students than male students. In addition, the number of marriages fell 50% during the period analysed (from 7 marriages per 1,000 inhabitants in 1910 to 3.4 in 2014).

The other indicators, although available for shorter time periods, also confirmed women's transition from traditional to non-traditional roles. There were more divorces (between 1982 and 2014, the number of divorces per 100 marriages increased six-fold) and abortions (in 1990, there were 4 abortions per 1,000 women—in the 15-44 age group—and 10.5 in 2014), women's presence in the job market grew (in 1976, there were 2.7 men working for every woman but only 1.2 men for every woman in 2014) and women were older when they had their first child (the average age was 25 in 1975 and 31 in 2014).

The behaviour of mortality is different in men and women

During the century analysed, the overall trend in the number of homicide victims followed the trend in the number of male homicide victims. However, when the number of murdered women was compared with the overall trend, the two did not track each other so closely. "Male and female victimization followed different trends during several periods. This gives a variable gender gap in homicide victimization in Spain over time," Linde remarked.

The ratio between male and female homicide victims narrowed between the early 20th century and the early 21st century. In the 1910s, 7-9 men were killed for every woman, in the late 1960s, it fell to 2.7 men for every women and, in the early 2010s, it was less than 2 men per woman.

Another noteworthy result is that, while male victimization decreased after the mid-1980s, female victimization increased. "This is interesting because during this period most countries in our region show a decrease in homicide victimization in general after the 1960s, including female victimization," the expert underscored.

Before the 1960s

The study shows that there is an increase in the number of women who were killed during the 1910s, a drop during the 1920s and a spike during the 1930s, up until the Spanish Civil War. After the war, homicides fell steadily until they reached their lowest ever values in the early 1960s. "The analysis shows a consistent upward trend from the early 20th century, with dips during the two dictatorships that ruled the country between 1923 and 1930 and between 1939 and 1975. The lower death rates during these years are probably due to the restrictions on personal freedom," the researcher suggested.

To conclude, the article raises a considerable number of questions because many more analyses can be performed on the data compiled. "I have published these data now for reasons of research ethics, so that other colleagues can use them in future studies," Linde said.

Study shows acceleration of global mean ocean circulation since 1990s

by Robert Monroe, University of California - San Diego

A study published today in the journal Science Advances, suggests global ocean circulation has accelerated during the past two decades. The research team found that oceanic kinetic energy shows a statistically significant increase since early 1990s, calculating a 36-percent acceleration of global mean ocean circulation.

The trend is particularly prominent in the global tropical oceans, reaching depths of thousands of meters. The deep-reaching acceleration of the ocean circulation is mainly induced by a planetary intensification of surface winds, authors said.

The study was led by Shijian Hu, who performed the work as a postdoctoral researcher in the laboratory of Janet Sprintall, an oceanographer at Scripps Institution of Oceanography at the University of California San Diego who is a co-author of the paper. Hu is now a scientist at the CAS Key Laboratory of Ocean Circulation and Waves, at the Institute of Oceanology (IOCAS) in Qingdao, China.

"The magnitude and extent of the acceleration in ocean currents we detected throughout the global ocean and to 2000-meter (6,560 foot) depth was quite surprising," said Sprintall. "While we expected some response to the increased winds over the past two decades, that the acceleration was above and beyond that was an unexpected response that is likely due to global climate change."

Large-scale ocean circulation is the main dynamic process that redistributes ocean water mass and heat and plays an important role in Earth's environment and climate system. It regulates land temperatures, most notably in regions such as western Europe where a flow of relatively warm water makes the climate of cities such as Madrid warmer than cities such as New York, despite being at the same latitude.

Because of internal dynamic processes and natural variability, ocean circulation in different regions has different responses to global climate warming. And there is still a lack of systematic and continuous direct observations of the earth's ocean circulation. Hence circulation trends have not been well-understood, study authors said.

A growing body of evidence suggests, though, that continuous greenhouse gas emissions due to human activities give rise to Earth's energy imbalance and continuous ocean warming. Thus, it is essential to know what large-scale ocean circulation is going to be under the background of global warming, said study co-authors.

An international team of scientists from IOCAS, Scripps, NOAA and the Commonwealth Scientific and Industrial Research Organization in Australia used ocean circulation and wind speed data from multiple sources, including observations from the global Argo network of robotic floats and numerical simulations, to investigate global mean ocean circulation and global mean sea surface wind speed. They concluded that the recent acceleration is far greater than what would be explained by natural variability. The rest is induced by the influence of continuous greenhouse gas emissions.

The intensified surface winds since the early 1990s, the authors said, spurs ocean circulation. The acceleration may lead to enhanced heat and water mass transport, so additional energy would be redistributed more evenly and the water cycle in the ocean may be intensified as well. Heat in upper ocean layers may be transferred into the deep ocean more efficiently due to the deep reach of this acceleration. Further research is needed to explore the implications of this study, the authors said.

Atlantic Ocean may get a jump-start from the other side of the world

More information: https://advances.sciencemag.org/content/6/6/eaax7727 Shijian Hu et al. Deep-reaching acceleration of global mean ocean circulation over the past two decades, Science Advances (2020). DOI: 10.1126/sciadv.aax7727

Climate change denialism is something we all suffer from

by Caroline Tang, University of New South Wales

Climate change denialism is something that applies to more than just diehard non-believers, a UNSW Sydney researcher argues.

The unprecedented bushfire crisis has strengthened demand for government action on climate change and galvanized Australians to take to the streets protesting against the nation's reliance on fossil fuels.

Some Australians have taken more drastic action, such as actor Yael Stone who gave up the permanent right to work in the US.

But for many people, such action seems unrealistic.

"While we may know it is better for the environment to give up our car for public transport, stop using single-use plastics, or eat less meat—we do not always do all these things all the time.

"It's almost impossible to live with zero impact on the planet, but it's what we do when we recognize this that matters," Belinda Xie asserts.

The UNSW Scientia Ph.D. candidate specializes in cognitive science and researches the psychology of climate change.

"It's important that we acknowledge we are all climate deniers, to some extent, and then understand how and why we reached this point," Ms Xie said.

"It's not simply because humans are bad or selfish people: there are a lot of external factors out of our control, such as the information we consume that can encourage denialism, or the way our economy is set up.

"So, we then need to ask ourselves: how do we overcome this denialism—what action can we take as a community and what can government and business do?"

Ms Xie said psychologists' interest in climate science ramped up when climate scientist James E. Hansen told the US Senate in 1988 that the greenhouse effect had been detected and was changing the climate.

"Climate scientists have been doing their research and communicating it for many decades, but achieving behavioral change has been difficult," she said.

"So, psychologists have been trying to find out why—for example, psychologists discovered that emotions and shared values, not facts, more easily resonate with people.

"People also feel psychologically distant from climate change: they think it's not going to happen to them, it's going to happen in the future, or it's going to happen overseas.

"There has also been the emergence of mental health issues stemming from climate change which is another concern to psychologists."

The denialism spectrum

Ms Xie said researchers defined denialism as a "construct" in the context of climate change and environmental psychology.

"To know that something is real but to actively say it's not—that's denialism," she said. "Sociologist Stanley Cohen's well-known categorization system refers to three types of denial: Literal, Interpretive and Implicatory denial.

"Using climate change as an example, Literal denial is: 'the climate is not changing.' The second level, Interpretive denial, is: 'the climate is changing but it's not caused by humans.'"

"The last one, Implicatory denial, is: 'I accept the climate is changing and that humans are causing it, but whether we need to do anything about it is debatable.'"

Ms Xie said a famous study led by Yale University examined denialism in relation to people's climate change beliefs.

"The study identified six distinct groups of Americans on a spectrum from climate action to climate denialism, and found three subcategories of deniers," she said.

"The deniers were: Dismissive—global warming is not happening, Doubtful—I don't know if global warming is happening but I'm not concerned about it, and Disengaged—I don't know if global warming is happening but because I don't know enough, I could change my mind.

"Since the original study, the researchers have monitored the size of these six groups and found that most Americans now believe climate change is happening, while a minority remain in the denialist categories."

Factors behind denialism

Ms Xie said there were a multitude of psychological factors and motivations which contributed to climate denialism, from motivated reasoning, free-market ideology and social norms, to pluralistic ignorance and inefficacy.

"In motivated reasoning, you reach a conclusion first and then you interpret and seek out information that's consistent with that; for example, you might decide climate change is an obstacle to you enjoying your way of life, so in order to not worry about it you deny its existence," she said.

"There are also social factors and norms; so, if all your friends are denying something and you still want to be friends with them, then you will probably also deny it.

"Climate change is also a political issue—people affiliate with political parties, their people and policies—and there is a lot of institutional and systematic denial disseminated through fossil fuel companies and parts of the media, so all this information influences people's beliefs, even if they don't actively seek it."

Ms Xie said free market ideology was another key factor in climate change denialism.

"This concept is popular amongst people who are politically conservative: the belief that free markets should be left to function without government intervention," she said.

"If people believe in free market ideology, it's more difficult for them to accept climate action, such as government carbon emissions policies."

The idea of "pluralistic ignorance" was a further important factor in denialism, Ms Xie said.

"This is where a majority of people think their beliefs are in the minority, while a vocal minority thinks their beliefs reflect the majority," she said.

"For example, climate deniers have loud voices that are publicised through a host of major media outlets.

"But, according to many surveys and polls, most Australians accept that climate change is happening and underestimate the rate at which they think other Australians also believe the same thing."

Ms Xie said that as a result, many Australians could feel uncomfortable expressing their climate change views without knowing their views are, in fact, popular.

"In the case of climate change then, it could well be that the so-called 'quiet Australians' are those who support climate action," she said.

Recognising climate denialism

Ms Xie said it was important to recognise that we are all on the spectrum of climate denialism.

"The alternative, to be constantly thinking about and acting on the climate crisis, would be debilitating," she said.

"We are all hypocrites to some extent, including the celebrities who signed the controversial letter supporting environmental group Extinction Rebellion.

"The letter acknowledged the undersigned were hypocrites for wanting climate action while leading high emissions lifestyles."

Ms Xie said the letter showed how denial could be one contributor to people continuing their high emissions lifestyles.

"There are, however, a lot of other obstacles discouraging people from taking action," she said.

"In behavior change psychology there's a spectrum of activity: risk perception leading to behavioural intention, leading to actual behavior.

"For example, you think climate change is a problem, you plan to do something about climate change and then you take action."

Ms Xie's research on predicting climate change risk perception and willingness to act was published in the Journal of Environmental Psychology last year.

"In the context of promoting climate mitigation, we proposed behavioral willingness as a more important outcome variable than risk perception," she said.

"We noted, however, that behavioral willingness is ultimately different from actual behavior.

"So, by identifying how much other factors influence behavioral willingness and actual behavior, researchers will be better positioned to advise policymakers and communicators on how to increase climate action."

Overcoming climate denialism

Ms Xie said it was a challenge to live without having an impact on the environment and even she could be a denier at times.

"I sometimes deny it in order to live, for example, I felt terrible taking a plane trip back home for Christmas, but I denied it to keep on living," she said.

"Australia is a wealthy nation with high emissions, so it's difficult to live here without being some sort of hypocrite and engaging in action that involves emissions.

"For a modern society to function there will be some denial involved."

Ms Xie said it was important to recognize this and take action to move beyond our own climate denialism and then urge others to do the same.

"It could be as simple as starting a conversation with friends and family, writing to MPs, donating to a climate action organization, or becoming a more environmentally conscious consumer," she said.

"You might even attend a rally—we argued that striking to support climate action can promote the psychological factors most important for fighting climate change.

"Based on our research, decreasing inefficacy—the belief that "I can't make a difference' – and promoting social norms, are some of the most effective ways to encourage action on climate."

Ms Xie said appealing to emotions and shared values was also key to fostering action, because researchers in psychology agreed that facts were not always a good strategy for changing minds.

"For example, even if you provide people with the facts about climate change, not everyone is going to interpret them in the way that you intend," she said.

"So, there is an increasing focus on engaging people's values through interesting stories and having those stories told through diverse sources to encourage connections and ultimately, action on climate.

"Making behavioral change at an individual level is important, but it's just as important for the people and institutions at the top to inspire and implement change for the good of our planet and future generations."

Belinda Xie's research paper, "Predicting climate change risk perception and willingness to act," is available in the Journal of Environmental Psychology.

Majority of US adults believe climate change is most important issue today

More information: Belinda Xie et al. Predicting climate change risk perception and willingness to act, Journal of Environmental Psychology (2019). DOI: 10.1016/j.jenvp.2019.101331

Next generation of greenhouses may be fully solar powered

by Brendan O'connor, North Carolina State University

Many greenhouses could become energy neutral by using see-through solar panels to harvest energy—primarily from the wavelengths of light that plants don't use for photosynthesis. Those are the findings of a new modeling study conducted by engineering, plant biology and physics researchers at North Carolina State University.

"Plants only use some wavelengths of light for photosynthesis, and the idea is to create greenhouses that make energy from that unused light while allowing most of the photosynthetic band of light to pass through," says Brendan O'Connor, corresponding author of the study and an associate professor of mechanical and aerospace engineering at NC State. "We're able to do this by using organic solar cells, because they allow us to tune the spectrum of light that the solar cell absorbs—so we can focus on using mostly wavelengths of light that plants don't use. However, until now it wasn't clear how much energy a greenhouse could capture if it was using these semitransparent, wavelength selective, organic solar cells."

To address that question, researchers used a computational model to estimate how much energy a greenhouse could produce if it had semitransparent organic solar cells on its roof—and whether that would be enough energy to offset the amount of energy the greenhouse required to operate effectively. The model was developed to estimate energy use for greenhouses growing tomatoes at locations in Arizona, North Carolina and Wisconsin.

"A lot of the energy use in greenhouses comes from heating and cooling, so our model focused on calculating the energy load needed to maintain the optimal temperature range for tomato growth," O'Connor says. "The model also calculated the amount of energy a greenhouse would produce at each location when solar cells were placed on its roof."

The modeling is complex because there's a complicated trade-off between the amount of power the solar cells generate and the amount of light in the photosynthetic band that they allow to pass through. Basically, if growers are willing to sacrifice larger amounts of photosynthetic growth, they can generate more power.

What's more, the solar cells used for this analysis are effective insulators, because they reflect infrared light. This helps to keep greenhouses cooler in the summer, while trapping more warmth in the winter.

The end result is that, for many greenhouse operators, the trade-off could be a small one. Particularly for greenhouses in warm or temperate climates.

For example, in Arizona, the greenhouses could become energy neutral—requiring no outside source of power—while blocking only 10% of the photosynthetic band of light. However, if growers are willing to block more photosynthetic light, they could generate twice as much energy as they required to operate the greenhouse. In North Carolina, a greenhouse could become energy neutral while blocking 20% of the photosynthetic light. In Wisconsin, greenhouses couldn't become energy neutral using the semitransparent solar cells—keeping the greenhouse warm in winter requires too much energy. However, the solar cells could meet up to 46% of the greenhouse's energy demand.

"While the technology does use some of the light plants rely on, we think the impact will be negligible on plant growth—and that the trade-off will make financial sense to growers," O'Connor says.

The paper, "Achieving Net Zero Energy Greenhouses by Integrating Semitransparent Organic Solar Cells," is published in the journal Joule.

This solar greenhouse could change the way we eat

More information: Eshwar Ravishankar et al. Achieving Net Zero Energy Greenhouses by Integrating Semitransparent Organic Solar Cells, Joule (2020). DOI: 10.1016/j.joule.2019.12.018

I hacked the government, and it was easier than you may think

by Harvard Gazette

How I hacked the government (it was easier than you may think) — Max Weiss '20 conducted research on bots and hacked a government website comment section with 1,000 fake comments. Credit: Stephanie Mitchell/Harvard Staff Photographer

Max Weiss never intended to hack the government. His discovery of how easy it is to do—outlined in a new paper he authored—came of the best of intentions.

Weiss, a government concentrator from Cincinnati, was doing advocacy work for state expansion and defense of Medicaid last summer, a project that combined his interests in public policy and healthcare. While studying the ways in which various advocacy groups can influence pending legislation, he learned how valuable such groups find the federal government's comment period, when members of the public are invited to weigh in on new or pending legislation via online forms. He realized how easy it would be to manipulate the results using bots—computer programs that generate automated responses—to flood the sites with fake responses for or against any proposal.

The 21-year-old detailed his findings in a recent Technology Science piece, "Deepfake Bot Submissions to Federal Public Comment Websites Cannot Be Distinguished from Human Submissions."

"We were spending a lot of time and energy getting high-quality comments from constituents," said Weiss. "I wanted to make sure these federal agencies understood the potential consequences of their policies, and I had the idea that I could use a bot and submit a lot of fake comments."

He paused, recognizing that corrupting the process was fraught: "This would be bad for democracy."

But the Leverett House resident couldn't shake the idea, and he began to research the feasibility of such a scheme. Turns out submission is easy to automate. Federal agencies have some leeway to discount comments that are obviously duplicated or irrelevant. But the typical technological defenses against attack, including CAPTCHAS, anomaly detection, and outside verification—all of which are integrated into online activity from banking to email log-in—were pretty much absent.

I hacked the government, and it was easier than you may think — Figure 1. Example of Synonym Replacement Used to Build Sentences in Large FCC Public Comment Campaign. The figure shows five examples of sentences (bottom panel) built from eight sentence components, each with three near-term options (top panel). The near-term options used to build combinations for one sentence were taken directly from just one FCC commenting campaign (comprising 1.3 million comments) discovered and dissected by Jeff Kao [1]. Given only the near-term options shown, 38 = 6,561 variations of this same sentence could be created.

"Most of those websites really just have a text box for your public comments and then a submit button," he said.

In the course of writing the Tech Science paper, Weiss realized that cybersecurity experts have been sounding the alarm on federal website vulnerability for years, but previous transgressions had used relatively unsophisticated substitution methods. "In 2017, there were 22 million comments posted for the FCC proposal to repeal net neutrality," he recalled. "And it was found that 96 percent of those were part of duplicative campaigns."

Weiss used AI methods to generate a high volume of unique deepfake comments about a proposed Medicaid waiver. He then wrote a program that automated the submission process, and ran it from a laptop in his dorm room over the course of a few days. He submitted more than 1,000 fake comments that comprised 55 percent of the total submissions and that were found by survey respondents to be indistinguishable from human comments. Afterward, he notified the federal Centers for Medicare and Medicaid Services which comments were part of his demonstration to prevent their interference with authentic public comment evaluation.

Among the scarier revelations was Weiss' admission that he was successful without being an expert coder and without special equipment. "I've learned to code in the last four years, just through a series of personal projects and summer jobs, and one class," said Weiss, who has taken some courses in the new program in technology science. "I think one of the very important findings from the study is that someone like me who's a very novice coder was able to Google his way through hacking the government.

"I've always been very interested in public policy," said Weiss, who also enjoys writing and performing comedy. "Most of my government study has been in health policy or in technology policy or public interest technology, so this was just kind of a synthesis of a lot of different things that I'd learned in the Government Department and just some personal tech projects that I have done in the past."

"Max did groundbreaking work, exactly the kind of real-world-impact work we encourage our students to do" in technology science classes, said Latanya Sweeney, professor of government and technology in residence and director of the Data Privacy Lab at the Institute for Quantitative Social Science, who serves as editor-in-chief of Technology Science.

"Thanks to Max's work, several groups within the federal government are now actively making changes to combat these kinds of vulnerabilities," she added.

US wildlife officials to soon decide on manatee status

More information: Deepfake Bot Submissions to Federal Public Comment Websites Cannot Be Distinguished from Human Submissions, Technology Science. doi.org/10.7910/DVN/OQCPOT. techscience.org/a/2019121801/

Cyborgs, trolls and bots: A guide to online misinformation

by David Klepper

Cyborgs, trolls and bots can fill the internet with lies and half-truths. Understanding them is key to learning how misinformation spreads online.

As the 2016 election showed, social media is increasingly used to amplify false claims and divide Americans over hot-button issues including race and immigration. Researchers who study misinformation predict it will get worse leading up to this year's presidential vote. Here's a guide to understanding the problem:

Misinformation vs. Disinformation

Political misinformation has been around since before the printing press, but the internet has allowed falsehoods, conspiracy theories and exaggerations to spread faster and farther than ever.

Misinformation is defined as any false information, regardless of intent, including honest mistakes or misunderstandings of the facts. Disinformation, on the other hand, typically refers to misinformation created and spread intentionally as a way to confuse or mislead.

Misinformation and disinformation can appear in political ads or social media posts. They can include fake news stories or doctored videos. One egregious example of disinformation from last year was a video of House Speaker Nancy Pelosi that was slowed down to make her sound as if she were slurring her words.

Research indicates that false claims spread more easily than accurate ones, possibly because they are crafted to grab attention.

Scientists at the Massachusetts Institute of Technology analyzed more than 126,000 stories, some true and some false, that were tweeted millions of times from 2006 through the end of 2016. They found that misleading or incorrect stories traveled six times faster—and reached more people.

Online misinformation has been blamed for deepening America's political polarization and contributing to distrust in government. The risks were highlighted in 2016 when Russian trolls created fake accounts to spread and amplify social media posts about controversial issues.

War Of The Bots And Cyborgs

The disposable foot soldiers in this digital conflict are bots. In the social media context, these autonomous programs can run accounts to spread content without human involvement.

Many are harmless, tweeting out random poems or pet photos. But others are up to no good and designed to resemble actual users.

One study by researchers at the University of Southern California analyzed election-related tweets sent in September and October 2016 and found that 1 in 5 were sent by a bot. The Pew Research Center concluded in a 2018 study that accounts suspected of being bots are responsible for as many as two-thirds of all tweets that link to popular websites.

While flesh-and-blood Twitter users will often post a few times a day, about a variety of subjects, the most obvious bots will tweet hundreds of times a day, day and night, and often only on a specific topic. They are more likely to repost content rather than create something original.

And then there's the cyborg, a kind of hybrid account that combines a bot's tirelessness with human subtlety. Cyborg accounts are those in which a human periodically takes over a bot account to respond to other users and to post original content. They are more expensive and time consuming to operate, but they don't give themselves away as robots.

"You can get a lot from a bot, but maybe it's not the best quality," said Emilio Ferrara, a data science researcher at the University of Southern California who co-wrote the study on Twitter bots. "The problem with cyborgs is they are much harder to catch and detect."

Spot The Bots

Bots can be hard to spot, even for the best researchers.

"We have 12 ways that we spot a bot, and if we hit seven or eight of them we have pretty high confidence," said Graham Brookie, director of the Atlantic Council's Digital Forensic Research Lab, a Washington, D.C.-based organization that studies connections between social media, cybersecurity and government.

Nonetheless, Brookie recalled the case of a Twitter account from Brazil that was posting almost constantly—sometimes once per minute—and displayed other bot-like characteristics. And yet, "It was a little grandma, who said, 'This is me!'"

Their prevalence and the difficulty of identifying them has made bots into a kind of digital bogeyman and transformed the term into an insult, used to dismiss other social media users with different opinions.

Michael Watsey, a 43-year-old New Jersey man who often tweets his support for President Donald Trump, said he has been repeatedly called a Russian bot by people he argues with online. The accusations prompted Twitter to temporarily suspend his account more than once, forcing him to verify he is a human.

"All I'm trying to do is use my First Amendment right to free speech," he said. "It's crazy that it's come to this."

Trolls And Sock Puppets

The word troll once referred to beasts of Scandinavian mythology who hid under bridges and attacked travelers. Now it also refers to people who post online to provoke others, sometimes for their own amusement and sometimes as part of a coordinated campaign.

Sock puppets are another oddly named denizen of social media, in this case a type of imposter account. While some users may use anonymous accounts simply to avoid identifying themselves, sock-puppet accounts are used by the owner to attack their critics or praise themselves. In October, Utah Sen. Mitt Romney acknowledged operating a secret Twitter account under the name "Pierre Delecto," which he used to defend himself against criticism.

Faked Videos: Deep, Cheap And Shallow

Deepfakes are videos that have been digitally created with artificial intelligence or machine learning to make it appear something happened that did not. They are seen as an emerging threat, as improvements in video editing software make it possible for tricksters to create increasingly realistic footage of, say, former President Barack Obama delivering a speech he never made, in a setting he never visited. They are expensive and difficult to create—especially in a convincing way.

Facebook announced last month that it would ban deepfake videos—with exceptions for satire. Beginning in March, Twitter will prohibit doctored videos, photography and audio recordings "likely to cause harm." Material that is manipulated but isn't necessarily harmful may get a warning label. And YouTube bans "deceptive uses of manipulated media" that could pose serious risk of harm.

By contrast, shallowfakes, cheapfakes or dumbfakes are videos that have been doctored using more basic techniques, such as slowing down or speeding up footage or cutting it.

Examples include a doctored video posted by Britain's Conservative Party before December's U.K. election that made it seem like a Labour Party official was struggling to respond to a question about Brexit.

Because they're easy and inexpensive to make, cheapfakes can be every bit as dangerous as their fancier cousin, the deepfake.

"Deepfakes are getting more realistic and easier to do," said John Pavlik, a journalism professor at Rutgers University who studies how technology and the internet are changing communication habits. "But you don't have to have special software to make these simpler ones."

Researchers who study Americans' changing media habits recommend that people turn to a variety of sources and perspectives for their news, use critical thinking when evaluating information on social media, and think twice about reposting viral claims. Otherwise, they say, misinformation will continue to flow, and users will continue to spread it.

"The only solution," Ferrara said, "is education."

Twitter moves to curb manipulated content including 'deepfakes'

No clear path for Golden Rice to reach consumers

by Washington University in St. Louis

Heralded as a genetically modified crop with the potential to save millions of lives, Golden Rice has just been approved as safe for human and animal consumption by regulators in the Philippines. The rice is a beta carotene-enriched crop that is intended to reduce Vitamin A deficiency (VAD), a health problem in very poor areas.

But a new study finds that most families at risk for VAD can't grow Golden Rice themselves, and most commercial farmers won't grow it either.

"Many families with Vitamin A deficient kids don't even have rice land to plant it," said Glenn Davis Stone, professor of sociocultural anthropology and environmental studies in Arts & Sciences at Washington University in St. Louis and co-author of a new paper in the journal Technology in Society. "And those in the mountains won't plant it because it has been bred into the lowland varieties of rice known as IR-64 and RSC-82."

The regulatory approval in the Philippines is a landmark for the scientists who developed Golden Rice for nutritional purposes. It is the first such approval in the developing world. But even after nearly three decades of development, Golden Rice is still beset by problems, according to Stone.

Golden Rice still has to be approved for commercial sale, and it still needs a company to grow marketable quantities of seed. And even then, Stone argues, there is no clear path for the rice to get to poor children.

Stone, an internationally recognized expert on the human side of global agricultural trends, was an early advocate for keeping an open mind about 'humanitarian' GMO crops, such as Golden Rice. Since 2013, he has directed a major Templeton Foundation-funded research project on rice in the Philippines.

Stone's new study is based on surveys and interviews of more than 115 rice farmers in the Nueva Ecija region, considered part of the 'rice bowl' of the Philippines.

Writing in the Feb. 7 issue of The Conversation, Stone and his study co-author Dominic Glover, a rice researcher at the Institute for Development Studies at the University of Sussex, suggest that backers of Golden Rice—and even some economists who have tried to project its health impacts—have made certain flawed assumptions about farmers' willingness to plant the crop.

"The old claim, repeated again in a recent book, that Golden Rice was 'basically ready for use in 2002' is silly," Stone and Glover wrote. "As recently as 2017, IRRI made it clear that Golden Rice still had to be 'successfully developed into rice varieties suitable for Asia, approved by national regulators, and shown to improve vitamin A status in community conditions.'

"The Philippines has managed to cut its childhood VAD rate in half with conventional nutrition programs. If Golden Rice appears on the market in the Philippines by 2022, it will have taken over 30 years of development to create a product that may not affect vitamin levels in its target population, and that farmers may need to be paid to plant."

Genetically modified Golden Rice falls short on lifesaving promises

More information: Dominic Glover et al, Golden Rice and technology adoption theory: A study of seed choice dynamics among rice growers in the Philippines, Technology in Society (2019). DOI: 10.1016/j.techsoc.2019.101227

Mediterranean sea urchins are more vulnerable than previously thought

by University of Barcelona

The sea urchin Paracentrotus lividus, an eatable species of great commercial interest found in the Mediterranean and North-East Atlantic, is more vulnerable than so far believed.

This is stated in a study by the University of Barcelona, the Spanish National Research Council (CSIC) and the University of Tromsø (Norway) on the genetic distribution of populations of this species, led by the experts Marta Pascual, from the Faculty of Biology and the Biodiversity Research Institute (IRBio) of the University of Barcelona, and Xavier Turon, CSIC research professor at the Center for Advanced Studies of Blanes (CEAB-CSIC). The study has been recently published in the journal Diversity and Distributions.

Using a genetic analysis of the populations of this sea urchin, this work assesses its population structure and connectivity as a result of its dispersal ability. Scientists analysed about 250 individuals of Paracentrotus lividus from eleven marine areas, ranging from the French Atlantic coast to the eastern Mediterranean.

Researcher Xavier Turon (CEAB-CSIC) notes that "adult sea urchin barely move," and that dispersal occurs during the larval stage, since "when they are larvae, they swim in the plankton and are carried away by marine currents. We thought they had a high dispersal capability, since they have a long larval lifespan, which lasts for weeks."

What the study reveals is that "the dispersal is not as wide as we expected," says Turon, "and geographical barriers such as the Strait of Gibraltar limit the connectivity of populations. The exchange of sea urchin larvae between different areas is more limited than what we thought."

Another shocking result is that the selection at a local level is having an impact on the genetic make-up of the different populations of urchins. "We found different allele composition among populations," note researchers Marta Pascual and Carles Carreras (UB-IRBio). "When we analysed the genetic sequences in which these differences appeared, we saw that they lay in genes that code for processes related to temperature and salinity." There is a strong selection pressure related to temperature in the Mediterranean, which can have important consequences regarding global warming.

The study reveals there is a progressive adaptation to salinity and temperature from west to east, and that the largest genetic differences are found between populations in the Atlantic and the Mediterranean. In the latter, the populations of western Mediterranean areas are also differentiated from those in the eastern Mediterranean.

Despite being the target of an active fishery, this species is very abundant in the Catalan coasts, since the fishing pressure has removed many of its predators (mainly fish). Urchins are herbivorous and eat seaweeds and seagrasses. With no predators, the populations can grow excessively and can eliminate submarine forests by overgrazing.

There are two main species of sea urchins in the littoral area of the Mediterranean: the eatable species Paracentrotus lividus, and the black sea urchin Arbacia lixula, non-edible. The new study brings new data to consider so as to predict potential future scenarios of how the common sea urchin populations will respond to antagonist pressures of predator removal and fishing, in a context of progressive warming.

Chimera formation could favor the expansion of invasive species in the marine environment

More information: Carlos Carreras et al, East is East and West is West: Population genomics and hierarchical analyses reveal genetic structure and adaptation footprints in the keystone species Paracentrotus lividus (Echinoidea), Diversity and Distributions (2019). DOI: 10.1111/ddi.13016

Cattle grazing supports biodiversity in Romania

by Sarah Pocock, Fauna & Flora International

Blocking out the seemingly endless rain, cold and dark of midwinter is no mean feat, but picture this: it's early summer, the days are growing longer, the earth is warming underfoot and meadows are humming with life. Fit to bursting with plants, insects, birds and small mammals, these wildflower havens are a sensory overload. Vibrant yellows, pinks and purples nestle among the fresh greens while the meadow orchestra buzzes, twitters and snuffles its summertime song.

Wildflower-rich grasslands offer us more than inspirational backdrops and daisy chains, though. Flowers attract pollinators foraging for their next nectar fix, permanent plant cover protects soil stability and enhances the land's capacity to retain and store water, helping to reduce flood risk, and altogether the ecosystems lock up significant amounts of carbon.

Many of these wildflower meadows would not exist without people who, over millennia, shaped the landscape through traditional farming practices including livestock grazing and regular cutting for hay.

These diverse, semi-natural grasslands are now globally threatened, however. The culture shift from low-intensity to industrial-scale agricultural management and the increasing use of chemical pesticides and fertilizers are two of the main threats facing these habitats worldwide. The United Kingdom's wildflower meadows have now almost entirely disappeared—97% have been lost within the last century. Pressure is also mounting on wildflower habitat across the rest of Europe, where—alongside the primary threat of intensifying agriculture—afforestation and land abandonment also contribute to the degradation of once-diverse grassland systems. In a few special areas, however, wildflower havens not only remain—they flourish.

One of these refuges is the Târnava Mare area in southern Transylvania, where centuries of traditional land management have shaped a biodiverse and dynamic mosaic of old-growth woodland, wildflower-rich pastures and meadows and small areas of farmed land, supporting over 1,000 plant and 600 butterfly and moth species and representing some of Europe's most extensive semi-natural lowland grassland. Since 2004, Fundaţia ADEPT, an Anglo-Romanian NGO with which Fauna & Flora International (FFI) has been a partner for over 10 years, has worked to conserve the ecological and cultural uniqueness of this landscape.

Historically, dairy cattle grazed these pastures, but industry uncertainty and low economic returns led many farmers to switch to sheep farming. The once species-rich grassland of Angofa valley suffered greatly where sheep had overgrazed, leaving an eroded habitat taken over by invasive weeds and with dwindling floristic diversity.

To prevent further deterioration, ADEPT purchased 200 hectares of land within the Angofa valley, grant-aided by FFI's Halcyon Land & Sea Fund, supported by Arcadia—a charitable fund of Lisbet Rausing and Peter Baldwin—and FFI's wider supporter network. The plan was to reinstate cattle grazing—a much more sympathetic way to manage grasslands than sheep farming, as cattle graze less closely and selectively than sheep and their trampling habits open up coarse vegetation and leave tussocks of longer grasses which benefit insects and small mammals.

Generous donations from individual UK supporters and support from FFI enabled the purchase of a 60-strong herd of Aberdeen Angus beef cattle and, since their arrival at Angofa in March 2018, once degraded pastures are already showing encouraging signs of regeneration. Floristic diversity is on the rebound and it is hoped that with this habitat recovery, birds such as corncrake, butterflies including the large blue and a whole host of other insects and small mammals will once again thrive here.

Now a healthy and established herd, the cattle are not only helping to restore the land—they also offer a viable, profit-making economic model which can be scaled across other Transylvanian communities and the wider Carpathian region.

The Angofa farm's profits from 2019 will be reinvested in the farm and will support ADEPT's other core conservation activities. The purchase and sensitive management of this land has prevented the loss of an important refuge for biodiversity and we look forward to further supporting ADEPT as they continue to protect the nature-rich farming landscapes of Transylvania.

Four steps to make your lawn a wildlife haven – from green desert to miniature rainforest

LA REVUE GAUCHE - Left Comment