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1421Q950687 | Biologia, Sistema Endócrino Humano, Segundo Semestre, UECE, UECE CEV, 2018

Atente para a seguinte notícia “A Secretaria da Saúde do Ceará (Sesa) confirmou três mortes e sete casos de gripe H1N1 no Ceará. A doença pode causar febres de até 40º.” (16/04/2018)

Fonte: https://www.opovo.com.br/noticias/saude/2018/04/confirma dos-30-casos-de-h1n1-em-fortaleza.html

No que diz respeito à gripe H1N1, é correto afirmar que

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1422Q950183 | Física, Oscilação e Ondas, Física e Química, UECE, UECE CEV, 2018

Sobre o olho humano, é correto afirmar que
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1423Q679093 | Sociologia, Filosofia e Sociologia 2° Fase, UECE, UECE CEV, 2019

Migração é o deslocamento de indivíduos dentro de um espaço geográfico, de forma temporária ou permanente, constituindo, deste modo, fluxos migratórios.

No que diz respeito à migração no Brasil, assinale a afirmação verdadeira.

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1424Q679608 | História, Período Colonial produção de riqueza e escravismo, Geografia e História 2 Dia, UECE, UECE CEV, 2019

Atente para o seguinte excerto: “...A partir de minhas pesquisas em Portugal, eis a lista dos “crimes” de 235 moradores da Bahia processados pela Santa Inquisição entre 1546 a 1821, data em que é extinto este tribunal eclesiástico: judaísmo: 96; bigamia: 34; blasfêmia: 33; sodomia: 18; gentilismo: 12; luteranismo: 10; feitiçaria: 10; contra a Inquisição: 8; falsos padres: 6; irreligiosidade: 6; solicitação: 2”.
MOTT, L. Bahia: inquisição e sociedade [online]. Salvador: EDUFBA, 2010. p.24.

No excerto acima, Luiz Mott apresenta um aspecto da história colonial brasileira que corresponde
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1425Q945607 | Inglês, Segundo Semestre, UECE, UECE CEV, 2019

Texto associado.

How a Canadian Chain Is Reinventing Book Selling

By Alexandra Alter

About a decade ago, Heather Reisman, the chief executive of Canada’s largest bookstore chain, was having tea with the novelist Margaret Atwood when Ms. Atwood inadvertently gave her an idea for a new product. Ms. Atwood announced that she planned to go home, put on a pair of cozy socks and curl up with a book. Ms. Reisman thought about how appealing that sounded. Not long after, her company, Indigo, developed its own brand of plush “reading socks.” They quickly became one of Indigo’s signature gift items.

“Last year, all my friends got reading socks,” said Arianna Huffington, the HuffPost cofounder and a friend of Ms. Reisman’s, who also gave the socks as gifts to employees at her organization Thrive. “Most people don’t have reading socks — not like Heather’s reading socks.”

Over the last few years, Indigo has designed dozens of other products, including beach mats, scented candles, inspirational wall art, Mason jars, crystal pillars, bento lunchboxes, herb growing kits, copper cheese knife sets, stemless champagne flutes, throw pillows and scarves.

It may seem strange for a bookstore chain to be developing and selling artisanal soup bowls and organic cotton baby onesies. But Indigo’s approach seems not only novel but crucial to its success and longevity. The superstore concept, with hulking retail spaces stocking 100,000 titles, has become increasingly hard to sustain in the era of online retail, when it’s impossible to match Amazon’s vast selection.

Indigo is experimenting with a new model, positioning itself as a “cultural department store” where customers who wander in to browse through books often end up lingering as they impulsively shop for cashmere slippers and crystal facial rollers, or a knife set to go with a new Paleo cookbook. Over the past few years, Ms. Reisman has reinvented Indigo as a Goop-like, curated lifestyle brand, with sections devoted to food, health and wellness, and home décor.

Ms. Reisman is now importing Indigo’s approach to the United States. Last year, Indigo opened its first American outpost, at a luxury mall in Millburn, N.J., and she eventually plans to open a cluster of Indigos in the Northeast. Indigo’s ascendance is all the more notable given the challenges that big bookstore chains have faced in the United States. Borders, which once had more than 650 locations, filed for bankruptcy in 2011. Barnes & Noble now operates 627 stores, down from 720 in 2010, and the company put itself up for sale last year. Lately, it has been opening smaller stores, including an 8,300-square-foot outlet in Fairfax County, Va.

“Cross-merchandising is Retail 101, and it’s hard to do in a typical bookstore,” said Peter Hildick-Smith, president of the Codex Group, which analyzes the book industry. “Indigo found a way to create an extra aura around the bookbuying experience, by creating a physical extension of what you’re reading about.”

The atmosphere is unabashedly intimate, cozy and feminine — an aesthetic choice that also makes commercial sense, given that women account for some 60 percent of book buyers. A section called “The Joy of the Table” stocks Indigobrand ceramics, glassware and acacia wood serving platters with the cookbooks. The home décor section has pillows and throws, woven baskets, vases and scented candles. There’s a subsection called “In Her Words,” which features idea-driven books and memoirs by women. An area labeled “A Room of Her Own” looks like a lushdressing room, with vegan leather purses, soft gray shawls, a velvet chair, scarves and journals alongside art, design and fashion books.

Books still account for just over 50 percent of Indigo’s sales and remain the central draw; the New Jersey store stocks around 55,000 titles. But they also serve another purpose: providing a window into consumers’ interests, hobbies, desires and anxieties, which makes it easier to develop and sell related products.

Publishing executives, who have watched with growing alarm as Barnes & Noble has struggled, have responded enthusiastically to Ms. Reisman’s strategy. “Heather pioneered and perfected the art of integrating books and nonbook products,” Markus Dohle, the chief executive of Penguin Random House, said in an email.

Ms. Reisman has made herself and her own tastes and interests central to the brand. The front of the New Jersey store features a section labeled “Heather’s Picks,” with a display table covered with dozens of titles. A sign identifies her as the chain’s “founder, C.E.O., Chief Booklover and the Heather in Heather’s Picks.” She appears regularly at author signings and store events, and has interviewed prominent authors like Malcolm Gladwell, James Comey, Sally Field, Bill Clinton and Nora Ephron.

When Ms. Reisman opened the first Indigo store in Burlington, Ontario, in 1997, she had already run her own consulting firm and later served as president of a soft drink and beverage company, Cott. Still, bookselling is an idiosyncratic industry, and many questioned whether Indigo could compete with Canada’s biggest bookseller, Chapters. Skepticism dissolved a few years later when Indigo merged with Chapters, inheriting its fleet of national stores. The company now has more than 200 outlets across Canada, including 89 “superstores.” Indigo opened its first revamped concept store in 2016.

The new approach has proved lucrative: In its 2017 fiscal year, the company’s revenue exceeded $1 billion Canadian for the first time. In its 2018 fiscal year, Indigo reported a revenue increase of nearly $60 million Canadian over the previous year, making it the most profitable year in the chain’s history.

The company’s dominance in Canada doesn’t guarantee it will thrive in the United States, where it has to compete not only with Amazon and Barnes & Noble, but with a resurgent wave of independent booksellers. After years of decline, independent stores have rebounded, with some 2,470 locations, up from 1,651 a decade ago, according to the American Booksellers Association. And Amazon has expanded into the physical retail market, with around 20 bookstores across the United States.

Ms. Reisman acknowledges that the company faces challenges as it expands southward. Still, she’s optimistic, and is already scouting locations for a second store near New York.

https://www.nytimes.com/2019/05/01

According to the text, the response of publishing executives to Ms. Reisman’s strategy of “integrating book and non-book products” has been
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1426Q943567 | Sociologia, Globalização, Filosofia e Sociologia, UECE, UECE CEV, 2021

Segundo a Pesquisa Nacional por Amostra de Domicílios (PNAD) Contínua do Instituto Brasileiro de Geografia Estatística (IBGE), o número de desempregados no ano de 2015 era de 8,5 milhões. Em 2017 foi sancionada a lei 13.467, lei da Reforma Trabalhista, no governo Michel Temer (2016-2018) e defendida, à época, pelo então ministro do Trabalho, Ronaldo Nogueira, como uma das medidas para estimular e promover empregos e dar segurança jurídica aos empregadores. No entanto, no ano de 2020, o desemprego atingiu a marca de 13,4 milhões de pessoas no país (PNAD Contínua). Na prática, a Reforma Trabalhista modificou a Consolidação das Leis Trabalhistas (CLT) no Brasil e trouxe uma série de mudanças para os direitos dos trabalhadores e para as obrigações das empresas. Dentre as modificações estão a não obrigatoriedade do imposto sindical para os trabalhadores, contratos de trabalho intermitentes e regulação do contrato de trabalhadores autônomos sem a necessidade devínculo empregatício e, com isto, sem quaisquer contribuições obrigatórias e deveres legais por parte das empresas contratantes.

Considerando os impactos dessa Reforma Trabalhista, é correto afirmar que

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1427Q943060 | História e Geografia de Estados e Municípios, Prova de Conhecimentos Gerais, UECE, UECE CEV, 2021

A imprensa local veiculou, no último mês de novembro, que o pesquisador cearense Licínio Nunes de Miranda, em sua pesquisa de doutoramento, encontrou, no cemitério São João Batista, em Fortaleza, o túmulo esquecido do herói nacional Francisco José do Nascimento, desta forma trazendo à tona o importante papel deste personagem
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1428Q943323 | Conhecimentos Gerais, Economia Nacional, Primeira Fase OAB, UECE, UECE CEV, 2021

Atente para o seguinte excerto sobre a reorganização da economia brasileira no período da ditadura cívico-militar:

“O governo militar instituído em 1964 reorganizou a economia do país impondo um modelo em que preponderava o capitalismo selvagem e concentrador de renda, sem os mecanismos da democracia dos países desenvolvidos”.


Antonio Pedro; Lizânias de Souza Lima. História sempre presente, 1. ed. São Paulo: FTD, 2010, p.285. v. 3.

Essa reorganização da economia brasileira ocorreu por meio do

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1429Q943354 | Educação Física, Primeira Fase OAB, UECE, UECE CEV, 2021

Os Jogos Olímpicos de Tóquio, que deveriam ter sido realizados em 2020, somente ocorreram neste ano de 2021, entre junho e agosto. Durante os jogos, é estimulada a prática dos valores olímpicos dentre os quais se encontram:
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1430Q943107 | Inglês, Prova de Conhecimentos Gerais, UECE, UECE CEV, 2021

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Britain, Norway and the United States join forces with businesses to protect tropical forests.


Britain, Norway and the United States said Thursday they would join forces with some of the world’s biggest companies in an effort to rally more than $1 billion for countries that can show they are lowering emissions by protecting tropical forests. The goal is to make intact forests more economically valuable than they would be if the land were cleared for timber and agriculture.


The initiative comes as the world loses acre after acre of forests to feed global demand for soy, palm oil, timber and cattle. Those forests, from Brazil to Indonesia, are essential to limiting the linked crises of climate change and a global biodiversity collapse. They are also home to Indigenous and other forest communities. Amazon, Nestlé, Unilever, GlaxoSmithKline and Salesforce are among the companies promising money for the new initiative, known as the LEAF Coalition.


Last year, despite the global downturn triggered by the pandemic, tropical deforestation was up 12 percent from 2019, collectively wiping out an area about the size of Switzerland. That destruction released about twice as much carbon dioxide into the atmosphere as cars in the United States emit annually.


“The LEAF Coalition is a groundbreaking example of the scale and type of collaboration that is needed to fight the climate crisis and achieve net-zero emissions globally by 2050,” John Kerry, President Biden’s senior climate envoy, said in a statement. “Bringing together government and privatesector resources is a necessary step in supporting the large-scale efforts that must be mobilized to halt deforestation and begin to restore tropical and subtropical forests.”

An existing global effort called REDD+ has struggled to attract sufficient investment and gotten mired in bureaucratic slowdowns. This initiative builds on it, bringing private capital to the table at the country or state level. Until now, companies have invested in forests more informally, sometimes supporting questionable projects that prompted accusations of corruption and “greenwashing,” when a company or brand portrays itself as an environmental steward but its true actions don’t support the claim.


The new initiative will use satellite imagery to verify results across wide areas to guard against those problems. Monitoring entire jurisdictions would, in theory, prevent governments from saving forestland in one place only to let it be cut down elsewhere.


Under the plan, countries, states or provinces with tropical forests would commit to reducing deforestation and degradation. Each year or two, they would submit their results, calculating the number of tons of carbon dioxide reduced by their efforts. An independent monitor would verify their claims using satellite images and other measures. Companies and governments would contribute to a pool of money that would pay the national or regional government at least $10 per ton of reduced carbon dioxide.


Companies will not be allowed to participate unless they have a scientifically sound plan to reach net zero emissions, according to Nigel Purvis, the chief executive of Climate Advisers, a group affiliated with the initiative. “Their number one obligation to the world from a climate standpoint is to reduce their own emissions across their supply chains, across their products, everything,” Mr. Purvis said. He also emphasized that the coalition’s plans would respect the rights of Indigenous and forest communities.


From: www.nytimes.com/April 22, 2021

According to John Kerry, the LEAF coalition constitutes an essential endeavor towards the
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1431Q943108 | Inglês, Prova de Conhecimentos Gerais, UECE, UECE CEV, 2021

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Britain, Norway and the United States join forces with businesses to protect tropical forests.


Britain, Norway and the United States said Thursday they would join forces with some of the world’s biggest companies in an effort to rally more than $1 billion for countries that can show they are lowering emissions by protecting tropical forests. The goal is to make intact forests more economically valuable than they would be if the land were cleared for timber and agriculture.


The initiative comes as the world loses acre after acre of forests to feed global demand for soy, palm oil, timber and cattle. Those forests, from Brazil to Indonesia, are essential to limiting the linked crises of climate change and a global biodiversity collapse. They are also home to Indigenous and other forest communities. Amazon, Nestlé, Unilever, GlaxoSmithKline and Salesforce are among the companies promising money for the new initiative, known as the LEAF Coalition.


Last year, despite the global downturn triggered by the pandemic, tropical deforestation was up 12 percent from 2019, collectively wiping out an area about the size of Switzerland. That destruction released about twice as much carbon dioxide into the atmosphere as cars in the United States emit annually.


“The LEAF Coalition is a groundbreaking example of the scale and type of collaboration that is needed to fight the climate crisis and achieve net-zero emissions globally by 2050,” John Kerry, President Biden’s senior climate envoy, said in a statement. “Bringing together government and privatesector resources is a necessary step in supporting the large-scale efforts that must be mobilized to halt deforestation and begin to restore tropical and subtropical forests.”

An existing global effort called REDD+ has struggled to attract sufficient investment and gotten mired in bureaucratic slowdowns. This initiative builds on it, bringing private capital to the table at the country or state level. Until now, companies have invested in forests more informally, sometimes supporting questionable projects that prompted accusations of corruption and “greenwashing,” when a company or brand portrays itself as an environmental steward but its true actions don’t support the claim.


The new initiative will use satellite imagery to verify results across wide areas to guard against those problems. Monitoring entire jurisdictions would, in theory, prevent governments from saving forestland in one place only to let it be cut down elsewhere.


Under the plan, countries, states or provinces with tropical forests would commit to reducing deforestation and degradation. Each year or two, they would submit their results, calculating the number of tons of carbon dioxide reduced by their efforts. An independent monitor would verify their claims using satellite images and other measures. Companies and governments would contribute to a pool of money that would pay the national or regional government at least $10 per ton of reduced carbon dioxide.


Companies will not be allowed to participate unless they have a scientifically sound plan to reach net zero emissions, according to Nigel Purvis, the chief executive of Climate Advisers, a group affiliated with the initiative. “Their number one obligation to the world from a climate standpoint is to reduce their own emissions across their supply chains, across their products, everything,” Mr. Purvis said. He also emphasized that the coalition’s plans would respect the rights of Indigenous and forest communities.


From: www.nytimes.com/April 22, 2021

Statistics related to deforestation in tropical forests show that in 2020 it
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1432Q943111 | Inglês, Prova de Conhecimentos Gerais, UECE, UECE CEV, 2021

Texto associado.

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Britain, Norway and the United States join forces with businesses to protect tropical forests.


Britain, Norway and the United States said Thursday they would join forces with some of the world’s biggest companies in an effort to rally more than $1 billion for countries that can show they are lowering emissions by protecting tropical forests. The goal is to make intact forests more economically valuable than they would be if the land were cleared for timber and agriculture.


The initiative comes as the world loses acre after acre of forests to feed global demand for soy, palm oil, timber and cattle. Those forests, from Brazil to Indonesia, are essential to limiting the linked crises of climate change and a global biodiversity collapse. They are also home to Indigenous and other forest communities. Amazon, Nestlé, Unilever, GlaxoSmithKline and Salesforce are among the companies promising money for the new initiative, known as the LEAF Coalition.


Last year, despite the global downturn triggered by the pandemic, tropical deforestation was up 12 percent from 2019, collectively wiping out an area about the size of Switzerland. That destruction released about twice as much carbon dioxide into the atmosphere as cars in the United States emit annually.


“The LEAF Coalition is a groundbreaking example of the scale and type of collaboration that is needed to fight the climate crisis and achieve net-zero emissions globally by 2050,” John Kerry, President Biden’s senior climate envoy, said in a statement. “Bringing together government and privatesector resources is a necessary step in supporting the large-scale efforts that must be mobilized to halt deforestation and begin to restore tropical and subtropical forests.”

An existing global effort called REDD+ has struggled to attract sufficient investment and gotten mired in bureaucratic slowdowns. This initiative builds on it, bringing private capital to the table at the country or state level. Until now, companies have invested in forests more informally, sometimes supporting questionable projects that prompted accusations of corruption and “greenwashing,” when a company or brand portrays itself as an environmental steward but its true actions don’t support the claim.


The new initiative will use satellite imagery to verify results across wide areas to guard against those problems. Monitoring entire jurisdictions would, in theory, prevent governments from saving forestland in one place only to let it be cut down elsewhere.


Under the plan, countries, states or provinces with tropical forests would commit to reducing deforestation and degradation. Each year or two, they would submit their results, calculating the number of tons of carbon dioxide reduced by their efforts. An independent monitor would verify their claims using satellite images and other measures. Companies and governments would contribute to a pool of money that would pay the national or regional government at least $10 per ton of reduced carbon dioxide.


Companies will not be allowed to participate unless they have a scientifically sound plan to reach net zero emissions, according to Nigel Purvis, the chief executive of Climate Advisers, a group affiliated with the initiative. “Their number one obligation to the world from a climate standpoint is to reduce their own emissions across their supply chains, across their products, everything,” Mr. Purvis said. He also emphasized that the coalition’s plans would respect the rights of Indigenous and forest communities.


From: www.nytimes.com/April 22, 2021

Still about the countries which will receive financial support from the coalition to reduce emissions and deforestation, the text mentions that they will
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1433Q688413 | Geografia, Geografia e História, UECE, UECE CEV, 2018

Suponha que, durante uma navegação entre um determinado ponto A até um ponto B, um navegador seguiu as direções ESE, SSE e OSO. Considerando a orientação pela rosa dos ventos, é correto afirmar que a direção
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1434Q679230 | Raciocínio Lógico, Matemática 2° Fase, UECE, UECE CEV, 2019

Qualquer número inteiro positivo pode ser expresso, de modo único, como soma de potências de 2. Exemplos: 63 = 20+ 21+ 22+ 23+ 24+ 25(seis parcelas), 64 = 26(uma parcela), 68 = 22+ 26(duas parcelas). O número de parcelas na expressão de 2018 como soma de potências inteiras de 2 é
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1435Q950081 | Geografia, Geografia e História, UECE, UECE CEV, 2018

A formação das precipitações pluviométricas envolve processos complexos de disponibilidade de vapor da água na atmosfera, partículas em suspensão, mecanismos de circulação atmosférica, assim como o comportamento de fatores físicos como pressão, temperatura e umidade. As nuvens desempenham um papel primordial na formação e nos tipos de precipitação. Geralmente as precipitações convectivas mais fortes estão associadas às nuvens do tipo
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1436Q943183 | Inglês, Segunda Fase, UECE, UECE CEV, 2021

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The World Might Be Running Low on Americans


The world has been stricken by scarcity. Our post-pandemic pantry has run bare of gasoline, lumber, microchips, chicken wings, ketchup packets, cat food, used cars and Chickfil-A sauce. Like the Great Toilet Paper Scare of 2020, though, many of these shortages are the consequence of near-term, Covid-related disruptions. Soon enough there will again be a chicken wing in every pot and more than enough condiments to go with it.


But there is one recently announced potential shortage that should give Americans great reason for concern. It is a shortfall that the nation has rarely had to face, and nobody quite knows how things will work when we begin to run out.


I speak, of course, of all of us: The world may be running low on Americans — most crucially, tomorrow’s working-age, childbearing, idea-generating, community-building young Americans. Late last month, the Census Bureau released the first results from its 2020 count, and the numbers confirmed what demographers have been warning of for years: The United States is undergoing “demographic stagnation,” transitioning from a relatively fast-growing country of young people to a slow-growing, older nation.


Many Americans might consider slow growth a blessing. Your city could already be packed to the gills, the roads clogged with traffic and housing prices shooting through the roof. Why do we need more folks? And, anyway, aren’t we supposed to be conserving resources on a planet whose climate is changing? Yet demographic stagnation could bring its own high costs, among them a steady reduction in dynamism, productivity and a slowdown in national and individual prosperity, even a diminishment of global power.


And there is no real reason we have to endure such a transition, not even an environmental one. Even if your own city is packed like tinned fish, the U.S. overall can accommodate millions more people. Most of the counties in the U.S. are losing working-age adults; if these declines persist, local economies will falter, tax bases will dry up, and localgovernments will struggle to maintain services. Growth is not just an option but a necessity — it’s not just that we can afford to have more people, it may be that we can’t afford not to.


But how does a country get more people? There are two ways: Make them, and invite them in. Increasing the first is relatively difficult — birthrates are declining across the world, and while family-friendly policies may be beneficial for many reasons, they seem to do little to get people to have more babies. On the second method, though, the United States enjoys a significant advantage — people around the globe have long been clamoring to live here, notwithstanding our government’s recent hostility to foreigners. This fact presents a relatively simple policy solution to a vexing long-term issue: America needs more people, and the world has people to send us. All we have to do is let more of them in.


For decades, the United States has enjoyed a significant economic advantage over other industrialized nations — our population was growing faster, which suggested a more youthful and more prosperous future. But in the last decade, American fertility has gone down. At the same time, there has been a slowdown in immigration.


The Census Bureau’s latest numbers show that these trends are catching up with us. As of April 1, it reports that there were 331,449,281 residents in the United States, an increase of just 7.4 percent since 2010 — the second-smallest decade-long growth rate ever recorded, only slightly ahead of the 7.3 percent growth during the Depression-struck 1930s.


The bureau projects that sometime next decade — that is, in the 2030s — Americans over 65 will outnumber Americans younger than 18 for the first time in our history. The nation will cross the 400-million population mark sometime in the late 2050s, but by then we’ll be quite long in the tooth — about half of Americans will be over 45, and one fifth will be older than 85.


The idea that more people will lead to greater prosperity may sound counterintuitive — wouldn’t more people just consume more of our scarce resources? Human history generally refutes this simple intuition. Because more people usually make for more workers, more companies, and most fundamentally, more new ideas for pushing humanity forward, economic studies suggest that population growth is often an important catalyst of economic growth.


A declining global population might be beneficial in some ways; fewer people would most likely mean less carbon emission, for example — though less than you might think, since leading climate models already assume slowing population growth over the coming century. And a declining population could be catastrophic in other ways. In a recent paper, Chad Jones, an economist at Stanford, argues that a global population decline could reduce the fundamental innovativeness of humankind. The theory issimple: Without enough people, the font of new ideas dries up, Jones argues; without new ideas, progress could be imperiled.


There are more direct ways that slow growth can hurt us. As a country’s population grows heavy with retiring older people and light with working younger people, you get a problem of too many eaters and too few cooks. Programs for seniors like Social Security and Medicare may suffer as they become dependent on ever-fewer working taxpayers for funding. Another problem is the lack of people to do all the work. For instance, experts predict a major shortage of health care workers, especially home care workers, who will be needed to help the aging nation.


In a recent report, Ali Noorani, the chief executive of the National Immigration Forum, an immigration-advocacy group, and a co-author, Danilo Zak, say that increasing legal immigration by slightly more than a third each year would keep America’s ratio of working young people to retired old people stable over the next four decades.


As an immigrant myself, I have to confess I find much of the demographic argument in favor of greater immigration quite a bit too anodyne. Immigrants bring a lot more to the United States than simply working-age bodies for toiling in pursuit of greater economic growth. I also believe that the United States’ founding idea of universal equality will never be fully realized until we recognize that people outside our borders are as worthy of our ideals as those here through an accident of birth.

A positive aspect of a declining world population is that
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1437Q943199 | Matemática, Segunda Fase, UECE, UECE CEV, 2021

Se o polinômio P(x) = x5+ x4+ x3+ x2+ x + k, onde k é um número real, é divisível por x–1, então, o valor da soma P(2) + P(–2) é
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1438Q947299 | Física, Dinâmica, Física e Química 2° Fase, UECE, UECE CEV, 2019

Suponha que uma esfera de aço desce deslizando, sem atrito, um plano inclinado. Pode-se afirmar corretamente que,em relação ao movimento da esfera, sua aceleração
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1439Q951176 | Inglês, Primeiro Semestre, UECE, UECE CEV, 2018

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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

As to the methodology used in the research, a group of participants had to learn associations between words and pictures of objects or scenes and then
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1440Q950669 | Geografia, Segundo Semestre, UECE, UECE CEV, 2018

Atente para o seguinte excerto: “O Brasil, por suas condições climáticas e grandes extensões de maciços montanhosos, está sujeito aos desastres associados aos movimentos de massa nas encostas”.

Fernandes, N. F. e Amaral, C. P. do. Movimentos de massa: uma abordagem geológico-geomorfológica. In. Geomorfologia e meio ambiente. Guerra, A. J. T. e Cunha, S. B.da. Rio de Janeiro. Bertrand Brasil. 1996.

Considerando o texto acima sobre os movimentos de massa no Brasil, é correto concluir que a principal causa desses eventos, nas áreas urbanas ocupadas, está associada

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