Questões de Concursos UECE

T E X T

EL TIGRE, Venezuela — Thousands of workers are fleeing Venezuela’s state-owned oil company, abandoning once-coveted jobs made worthless by the worst inflation in the world. And now the hemorrhaging is threatening the nation’s chances of overcoming its long economic collapse.

Desperate oil workers and criminals are also stripping the oil company of vital equipment, vehicles, pumps and copper wiring, carrying off whatever they can to make money. The double drain — of people and hardware — is further crippling a company that has been teetering for years yet remains the country’s most important source of income.

The timing could not be worse for Venezuela’s increasingly authoritarian president, Nicolás Maduro, who was re-elected last month in a vote that has been widely condemned by leaders across the hemisphere. Prominent opposition politicians were either barred from competing in the election, imprisoned or in exile.

But while Mr. Maduro has firm control over the country, Venezuela is on its knees economically, buckled by hyperinflation and a history of mismanagement. Widespread hunger, political strife, devastating shortages of medicine and an exodus of well over a million people in recent years have turned this country, once the economic envy of many of its neighbors, into a crisis that is spilling over international borders.

If Mr. Maduro is going to find a way out of the mess, the key will be oil: virtually the only source of hard currency for a nation with the world’s largest estimated petroleum reserves. But each month Venezuela produces less of it. Offices at the state oil company are emptying out, crews in the field are at half strength, pickup trucks are stolen and vital materials vanish. All of this is adding to the severe problems at the company that were already acute because of corruption, poor maintenance, crippling debts, the loss of professionals and even a lack of spare parts.

Now workers at all levels are walking away in large numbers, sometimes literally taking piecesof the company with them, union leaders, oil executives and workers say.

A job with Petróleos de Venezuela, known as Pdvsa, used to be a ticket to the Venezuelan Dream. No more.

Inflation in Venezuela is projected to reach an astounding 13,000 percent this year, according to the International Monetary Fund. When The New York Times interviewed Mr. Navas in May, the monthly salary for a worker like him was barely enough to buy a whole chicken or two pounds of beef. But with prices going up so quickly, it buys even less now.

Junior Martínez, 28, who has worked in the oil industry for eight years, is assembling papers, including his diploma as a chemical engineer. His wife and her daughter left three months ago to earn money in Brazil. “I get 1,400,000 bolívars a week and it isn’t even enough to buy a carton of eggs or a tube of toothpaste,”Mr. Martínez said of his salary in bolívars, Venezuela’s currency.

Mr. Martínez’s father, Ovidio Martínez, 55, recalled growing up here when the oil boom began. He cried as he spoke of his son’s determination to leave the country. “You watch your children leave and you can’t stop them,” the elder Mr. Martínez said, fighting back tears. “In this country, they don’t have a future.”

In El Tigre, hundreds of people stood in line one recent morning outside a supermarket, many waiting since the evening before to buy whatever food they could.

From: www.nytimes.com/June 14, 2018. Adapted.

T E X T

Men Fall Behind in College Enrollment.

Women Still Play Catch-Up at Work.

The coronavirus upended the lives of millions of college students. The Wall Street Journal reported this week that men have been hit particularly hard — accounting for roughly three-fourths of pandemic-driven dropouts — and depicted an accelerating crisis in male enrollment.

A closer look at historical trends and the labor market reveals a more complex picture, one in which women keep playing catch-up in an economy structured to favor men.

In many ways, the college gender imbalance is not new. Women have outnumbered men on campus since the late 1970s. The ratio of female to male undergraduates increased much more from 1970 to 1980 than from 1980 to the present. And the numbers haven’t changed much in recent decades. In 1992, 55 percent of college students were women. By 2019, the number had nudged up to 57.4 percent.

While the shift in the college gender ratio is often characterized as men “falling behind,” men are actually more likely to go to college today than they were when they were the majority, many decades ago. In 1970, 32 percent of men 18 to 24were enrolled in college, a level that was most likely inflated by the opportunity to avoid being drafted into the Vietnam War. That percentage dropped to 24 percent in 1978 and then steadily grew to a stable 37 percent to 39 percent over the last decade.

The gender ratio mostly changed because female enrollment increased even faster, more than doubling over the last half-century.

Because of the change in ratio, some selective colleges discriminate against women in admissions to maintain a gender balance, as The Journal reported. Generally, admissions officials prefer to limit the disparity to 55 percent female and 45 percent male. Their reason not to let the gender ratio drift further toward 2 to 1 is straightforward: Such a ratio would most likely cause a decrease in applications.

In a New York Times essay in 2006 titled “To All the Girls I’ve Rejected,” the dean of admissions at Kenyon College at the time explained: “Beyond the availability of dance partners for the winter formal, gender balance matters in ways both large and small on a residential college campus. Once you become decidedly female in enrollment, fewer males and, as it turns out, fewer females find your campus attractive.”

The raw numbers don’t take into account the varying value of college degrees. Men still dominate in fields like technology and engineering, which offer some of the highest salaries for recent graduates. Perhaps not coincidentally, the professors in those fields remain overwhelmingly male.

Women surged into college because they were able to, but also because many had to. There are still some good-paying jobs available to men without college credentials. There are relatively few for such women. And despite the considerable cost in time and money of earning a degree, many female-dominated jobs don’t pay well.

The fact that the male-female wage gap remains large after more than four decades in which women outnumbered men in college strongly suggests that college alone offers a narrow view of opportunity. Women often seem stuck in place: As they overcome obstacles and use their degrees to move into male-dominated fields, the fields offer less pay in return.

None of this diminishes the significance of the male decrease in college enrollment and graduation. Educators view the male-driven dive in community college enrollment over the last 18 months as a calamity. The pandemic confirmed what was already known. Higher socioeconomic classes are deeply embedded in college and will bear considerable cost and inconvenience to stay there, even if it means watching lectures on a laptop in the room above your parent’s garage and missing a season of parties and football games.

For other people, college attendance is far more fragile. It does not define their identities and is not as important as earning a steady paycheck or starting and nurturing a family. In a time of crisis,it can be delayed — but the reality is that people who drop out of college are statistically unlikely to complete a degree.

Last year, women were less likely than men to leave community college, despite their disproportionate responsibility for caregiving and domestic work, because they no doubt understood the bleak long-term job prospects for women without a credential.

www.nytimes.com/Sept.9,2021

T E X T

Can you learn in your sleep?

Sleep is known to be crucial for learning and memory formation. What's more, scientists have even managed to pick out specific memories and consolidate them during sleep. However, the exact mechanisms behind this were unknown — until now.

Those among us who grew up with the popular cartoon "Dexter's Laboratory" might remember the famous episode wherein Dexter's trying to learn French overnight. He creates a device that helps him to learn in his sleep by playing French phrases to him. Of course, since the show is a comedy, Dexter's record gets stuck on the phrase "Omelette du fromage" and the next day he's incapable of saying anything else. This is, of course, a problem that puts him through a series of hilarious situations.

The idea that we can learn in our sleep has captivated the minds of artists and scientists alike; the possibility that one day we could all drastically improve our productivity by learning in our sleep is very appealing. But could such a scenario ever become a reality?

New research seems to suggest so, and scientists in general are moving closer to understanding precisely what goes on in the brain when we sleep and how the restful state affects learning and memory formation.

For instance, previous studies have shown that non-rapid eye movement (non-REM) sleep — or dreamless sleep — is crucial for consolidating memories. It has also been shown that sleep spindles, or sudden spikes in oscillatory brain activity that canbe seen on an electroencephalogram (EEG) during the second stage of non-REM sleep, are key for this memory consolidation. Scientists were also able to specifically target certain memories and reactivate, or strengthen, them by using auditory cues.

However, the mechanism behind such achievements remained mysterious until now. Researchers were also unaware if such mechanisms would help with memorizing new information.

Therefore, a team of researchers set out to investigate. Scott Cairney, from the University of York in the United Kingdom, co-led the research with Bernhard Staresina, who works at the University of Birmingham, also in the U.K. Their findings were published in the journal Current Biology.

Cairney explains the motivation for the research, saying, "We are quite certain that memories are reactivated in the brain during sleep, but we don't know the neural processes that underpin this phenomenon." "Sleep spindles," he continues, "have been linked to the benefits of sleep for memory in previous research, so we wanted to investigate whether these brain waves mediate reactivation. If they support memory reactivation, we further reasoned that it could be possible to decipher memory signals at the time that these spindles took place."

To test their hypotheses, Cairney and his colleagues asked 46 participants "to learn associations between words and pictures of objects or scenes before a nap." Afterward, some of the participants took a 90-minute nap, whereas others stayed awake. To those who napped, "Half of the words were [...] replayed during the nap to trigger the reactivation of the newly learned picture memories," explains Cairney.

"When the participants woke after a good period of sleep," he says, "we presented them again with the words and asked them to recall the object and scene pictures. We found that their memory was better for the pictures that were connected to the words that were presented in sleep, compared to those words that weren't," Cairney reports.

Using an EEG machine, the researchers were also able to see that playing the associated words to reactivate memories triggered sleep spindles in the participants' brains. More specifically, the EEG sleep spindle patterns "told" the researchers whether the participants were processing memories related to objects or memories related to scenes.

"Our data suggest that spindles facilitate processing of relevant memory features during sleep and that this process boosts memory consolidation," says Staresina. "While it has been shown previously," he continues, "that targeted memory reactivation can boost memory consolidation during sleep, we now show that sleep spindles might represent the key underlying mechanism."

Cairney adds, "When you are awake you learn new things, but when you are asleep you refine them, making it easier to retrieve them and apply them correctly when you need them the most. This is important for how we learn but also for how we might help retain healthy brain functions."

Staresina suggests that this newly gained knowledge could lead to effective strategies for boosting memory while sleeping.

So, though learning things from scratch à la "Dexter's Lab" may take a while to become a reality, we can safely say that our brains continue to learn while we sleep, and that researchers just got a lot closer to understanding why this happens.

From: https://www.medicalnewstoday.com/articles/Mar/2018