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Disponível em: https://pt.foursquare.com. Acesso em: 14 maio 2024.
Nesse texto, a pergunta “What is sleep?”, em uma das embalagens do produto, está relacionada ao(à)
Remember the sky that you were born under,
know each of the star’s stories.
Remember the moon, know who she is.
Remember the sun’s birth at dawn. [...]
Remember your birth, how your mother struggled
to give you form and breath [...]
Remember the earth whose skin you are:
red earth, black earth, yellow earth, white earth
brown earth, we are earth.
Remember the plants, trees, animal life who all have their
tribes, their families, their histories, too [...]
Remember you are all people and all people are you.
Remember you are this universe and this universe is you.
Remember all is in motion, is growing, is you.
HARJO, J. She Had Some Horses. Londres: W. Norton & Company, 1983 (fragmento).
Nesse poema, de uma autora de ascendência indígena, o eu lírico ressalta a
My idea of philosophy is that if it is not relevant to human problems, if it does not tell us how we can go about eradicating some of the misery in this world, then it is not worth the name of philosophy. I think Socrates made a very profound statement when he asserted that philosophy is to teach us proper living. In this day and age “proper living” means liberation from the urgent problems of poverty, economic necessity and indoctrination, mental oppression.
DAVIS, A. Lectures on Liberation. Washington: Smithsonian Libraries, 1971 (adaptado).
Nesse texto, ao discorrer sobre a relevância da filosofia, a escritora Angela Davis tem por objetivo
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“It’s all we’ve been talking about since November,” says Patrick Franzen, publishing director for SPIE, the international society for optics and photonics. He’s referring to ChatGPT, the artificial intelligence (AI)-powered chatbot unveiled that month. In response to a prompt, ChatGPT can spin out fluent and seemingly well-informed reports, essays — and scientific manuscripts. Worried about the ethics and accuracy of such content, Franzen and managers at other journals are scrambling to protect the scholarly literature from a potential flood of manuscripts written in whole or part by computer programs.
Some publishers have not yet formulated policies. Most of those that have avoid an outright ban on AI-generated text, but ask authors to disclose their use of the automated tools, as SPIE is likely to do. For now, editors and peer reviewers have few alternatives, as they lack enforcement tools. No software so far can consistently detect the synthetic text the majority of the time. [...]
In some cases, the resulting text is indistinguishable from what people would write. For example, researchers who read medical journal abstracts generated by ChatGPT failed to identify one-third of them as written by machine, according to a December 2022 preprint. AI developers are expected to create even more powerful versions, including ones trained specifically on scientific literature — a prospect that has sent a shock wave through the scholarly publishing industry.
So far, scientists report playing around with ChatGPT to explore its capabilities, and a few have listed ChatGPT as a co-author on manuscripts. Publishing experts worry such limited use could morph into a spike of manuscripts containing substantial chunks of AI-written text.
Fonte: BRAINARD, Jeffrey. As scientists explore AI-written text, journals hammer out policies. Science, v. 379, n. 6634, p. 740–741, 22 feb. 2023. Disponível em: https://www.science.org/content/article/scientists-explore-ai-written-text-journals-hammer-policies.
No trecho do último parágrafo do texto “... to explore its capabilities ...”, o termo ITS refere-se a
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“It’s all we’ve been talking about since November,” says Patrick Franzen, publishing director for SPIE, the international society for optics and photonics. He’s referring to ChatGPT, the artificial intelligence (AI)-powered chatbot unveiled that month. In response to a prompt, ChatGPT can spin out fluent and seemingly well-informed reports, essays — and scientific manuscripts. Worried about the ethics and accuracy of such content, Franzen and managers at other journals are scrambling to protect the scholarly literature from a potential flood of manuscripts written in whole or part by computer programs.
Some publishers have not yet formulated policies. Most of those that have avoid an outright ban on AI-generated text, but ask authors to disclose their use of the automated tools, as SPIE is likely to do. For now, editors and peer reviewers have few alternatives, as they lack enforcement tools. No software so far can consistently detect the synthetic text the majority of the time. [...]
In some cases, the resulting text is indistinguishable from what people would write. For example, researchers who read medical journal abstracts generated by ChatGPT failed to identify one-third of them as written by machine, according to a December 2022 preprint. AI developers are expected to create even more powerful versions, including ones trained specifically on scientific literature — a prospect that has sent a shock wave through the scholarly publishing industry.
So far, scientists report playing around with ChatGPT to explore its capabilities, and a few have listed ChatGPT as a co-author on manuscripts. Publishing experts worry such limited use could morph into a spike of manuscripts containing substantial chunks of AI-written text.
Fonte: BRAINARD, Jeffrey. As scientists explore AI-written text, journals hammer out policies. Science, v. 379, n. 6634, p. 740–741, 22 feb. 2023. Disponível em: https://www.science.org/content/article/scientists-explore-ai-written-text-journals-hammer-policies.
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The early development of radar was driven primarily by military imperatives, and the targets that were to be detected were mainly aircraft and ships. It was no surprise that echoes were also received from terrain and from rainstorms, but the discovery, during World War II, that birds were often detectable was less expected. As the technology developed, and specially after transmission at the shorter ‘microwave’ wavelengths became commonplace, echoes from insects were also identified. In the late 1940’s and the 1950’s, radar technology was adapted rapidly to the needs of meteorologists, while ornithologists pioneered the use of defence and air-traffic control radars to study bird migration.
Radar observations of insects, however, were relatively sparse until the early 1960’s, when radar meteorologists became rather intensely interested in a type of warm-weather echo that appeared, puzzlingly from their perspective, when there was not a cloud in sight. Perhaps spurred by the meteorologists’ observations, entomologists began their own exploitation of the technology in 1968, when a rather modest radar, built by G.W. Schaefer specifically for insect observation and operated in West Africa just south of the Sahara, proved to be very effective.
Fonte: DRAKE, V.A. and REYNOLDS, D.R. Radar Entomology: Observing Insect Flight and Mi gration. CAB Internacional, 2012.
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What links Sir Isaac Newton, alien solar systems, and a new multi-million dollar TV show? The answer is “the three-body problem”: a conundrum in astronomy and mathematics that describes why it’s often difficult to predict the long-term trajectory of planets, moons and stars. So, what exactly is the problem? And how did it end up becoming the title of a TV series?
To understand, you first need to know a bit about the background to the TV show and its premise. The story is based on Liu Cixin’s epic sci-fi trilogy, The Remembrance of Earth’s Past, of which The Three-Body Problem is the first book. The original trilogy is characterised by the author’s attention to scientific detail. The adaptation is less so, but still crammed with scientific ideas.
The TV series focuses on the “Oxford Five”, who all studied under the same professor at the University of Oxford. Some have gone on to become scientists themselves (a postdoctoral physics researcher, a founder and chief scientific officer of a nano-tech company, and a theoretical physics academic), one has become a school physics teacher, while the fifth is now a snack-food entrepreneur. Scientific credentials abound.
The crux of the story is that an alien race — called the Trisolarans or San-Ti Ren — is headed to Earth to colonise it. Through intergalactic communication, these travellers attempt to intimidate human scientists into slowing down our rapid technological advancement, making Earth easier to conquer. But why are these aliens so hell-bent on taking over our planet in the first place? This is where the three-body problem comes in.
Bodies, in this context, is a scientific byword for planets, moons, suns or any other massive astronomical object. The extraterrestrials’ home planet is situated in a solar system with three suns, hence their name in the English translation of the book — the Trisolarans. This three-sun system can be highly unstable, making conditions difficult for life, hence the desire to travel across the Universe in order to inhabit our relatively stable Solar System. We only have one Sun, so Earth’s future is relatively predictable — at least for the next few million years.
Fonte: YATES, Kit. What is the three-body problem? The chaotic, cosmic mathematics behind the Netflix TV show. BBC, 2024. Disponível em: https://www.bbc.com/future/article/20240328-the-science-astronomy-and-mathematics-of-netflixs-3-body-problem-tv-show. Adaptado.
Constantes
Constante de Avogadro (NA) = 6,02 × 1023 mol−1
Constante de Faraday (F) = 9,65 × 104 C·mol−1 = 9,65 × 104 A·s·mol−1 = 9,65 × 104 J·V−1·mol−1.
Constante de Planck (h) = 6,63 × 10−34 J·s
Velocidade da luz no vácuo = 3,0 × 108 m·s−1
Número de Euler (e) = 2,72
Definições
Pressão: 1 atm = 760 Torr = 1,01325 × 105 N·m−2 = 1,01325 bar
Energia: 1 J = 1 N·m = 1 kg m2·s−2 = 6,24 × 1018 eV
Condições normais de temperatura e pressão (CNTP): 0 °C e 1 atm
Condições ambiente: 25 °C e 1 atm
Condições padrão: 1 bar; concentração das soluções = 1 mol·L−1 (rigorosamente: atividade unitária das espécies); sólido com estrutura cristalina mais estável nas condições de pressão e temperatura em questão.
(s) = sólido. (ℓ) = líquido. (g) = gasoso. (aq) = aquoso. (conc) = concentrado. (ua) = unidades arbitrárias. u.m.a. = unidade de massa atômica. [X] = concentração da espécie X em mol·L−1
ln X = 2,3 log X
Constantes
Constante de Avogadro (NA) = 6,02 × 1023 mol−1
Constante de Faraday (F) = 9,65 × 104 C·mol−1 = 9,65 × 104 A·s·mol−1 = 9,65 × 104 J·V−1·mol−1.
Constante de Planck (h) = 6,63 × 10−34 J·s
Velocidade da luz no vácuo = 3,0 × 108 m·s−1
Número de Euler (e) = 2,72
Definições
Pressão: 1 atm = 760 Torr = 1,01325 × 105 N·m−2 = 1,01325 bar
Energia: 1 J = 1 N·m = 1 kg m2·s−2 = 6,24 × 1018 eV
Condições normais de temperatura e pressão (CNTP): 0 °C e 1 atm
Condições ambiente: 25 °C e 1 atm
Condições padrão: 1 bar; concentração das soluções = 1 mol·L−1 (rigorosamente: atividade unitária das espécies); sólido com estrutura cristalina mais estável nas condições de pressão e temperatura em questão.
(s) = sólido. (ℓ) = líquido. (g) = gasoso. (aq) = aquoso. (conc) = concentrado. (ua) = unidades arbitrárias. u.m.a. = unidade de massa atômica. [X] = concentração da espécie X em mol·L−1
ln X = 2,3 log X
Constantes
Constante de Avogadro (NA) = 6,02 × 1023 mol−1
Constante de Faraday (F) = 9,65 × 104 C·mol−1 = 9,65 × 104 A·s·mol−1 = 9,65 × 104 J·V−1·mol−1.
Constante de Planck (h) = 6,63 × 10−34 J·s
Velocidade da luz no vácuo = 3,0 × 108 m·s−1
Número de Euler (e) = 2,72
Definições
Pressão: 1 atm = 760 Torr = 1,01325 × 105 N·m−2 = 1,01325 bar
Energia: 1 J = 1 N·m = 1 kg m2·s−2 = 6,24 × 1018 eV
Condições normais de temperatura e pressão (CNTP): 0 °C e 1 atm
Condições ambiente: 25 °C e 1 atm
Condições padrão: 1 bar; concentração das soluções = 1 mol·L−1 (rigorosamente: atividade unitária das espécies); sólido com estrutura cristalina mais estável nas condições de pressão e temperatura em questão.
(s) = sólido. (ℓ) = líquido. (g) = gasoso. (aq) = aquoso. (conc) = concentrado. (ua) = unidades arbitrárias. u.m.a. = unidade de massa atômica. [X] = concentração da espécie X em mol·L−1
ln X = 2,3 log X
Quando necessário, use os seguintes valores para as constantes:
Aceleração, local da gravidade g = 10m/s2.
Constante de gravitação universal G = 6,7 x 10–11 N·m2/kg2.
Massa da Terra MTerra = 6,0 x 1024kg.
Constante de Planck vezes a velocidade da luz hc = 1240 e V·nm.
Permissividade elétrica no vácuo ε0 = 8,85 x10–12 C2·N–1·m–2.
Quando necessário, use os seguintes valores para as constantes:
Aceleração, local da gravidade g = 10m/s2.
Constante de gravitação universal G = 6,7 x 10–11 N·m2/kg2.
Massa da Terra MTerra = 6,0 x 1024kg.
Constante de Planck vezes a velocidade da luz hc = 1240 e V·nm.
Permissividade elétrica no vácuo ε0 = 8,85 x10–12 C2·N–1·m–2.
O arco-íris é um fenômeno meteorológico de grande beleza e com profundo simbolismo para diferentes culturas. Sua explicação física foi debatida desde a Antiguidade até o início da Idade Moderna.
A respeito desse fenômeno, são feitas as seguintes afirmações:
I. Cada componente de comprimento de onda da luz do Sol que incide sobre uma gotícula de água suspensa na atmosfera emerge com o mesmo ângulo de espalhamento.
II. Para a formação do arco-íris, são necessárias tanto a ocorrência de refração quanto a de reflexão da luz.
III. O efeito visual do arco-íris é resultado de a luz do Sol ser policromática e de a água ser um meio dispersivo na faixa do espectro eletromagnético visível.
Está(ão) correta(s):
Convenções: Considere o sistema de coordenadas cartesiano, a menos que haja indicação contrária. Os eixos horizontal e vertical são indicados respectivamente por Ox e Oy, e o centro do sistema, por O.
N = {1; 2 ;3; . . .}: denota o conjunto dos números naturais.
R : denota o conjunto dos números reais.
i : denota a unidade imaginária, i2 = -1:
: denota o segmento de reta de extremidades nos pontos A e B.
AB : denota a reta que passa pelos pontos A e B.
O termo independente da expansão de (x + 1/x)6 (x - 2/x)5 é
Leonardo Padura, considerado o maior nome da literatura cubana no mundo, disse em reportagem a Jamil Chade no site do UOL:
“Nesse momento falta combustível em Cuba, falta alimento, falta remédio. Mas o que mais falta é esperança. E uma sociedade sem esperança é uma sociedade que tem um grande problema de funcionamento.”
Disponível em: https://noticias.uol.com.br/colunas/jamil-chade/2024/03/03/o-que-mais-falta-em-cuba-e-esperanca-diz-escritor-leonardo-padura.htm Acesso em 11 jun. 2024.
O depoimento do escritor se relaciona ao contexto histórico de:
Observe as imagens abaixo:
Cartaz da Ação Integralista Brasileira
Disponível em: https://imagohistoria.blogspot.com/2009/03/era-vargas-3-de-4.html – acesso em 08 ago. 2024.
Cartaz do Partido Comunista
Disponível em: https://documentosrevelados.com.br/cartazes-e-panfletos-da-alianca-nacional-libertadora-anl/ – acesso em 08 ago. 2024.
Sobre o contexto histórico de atuação dos dois movimentos na Era Vargas, representados pelos cartazes, assinale a alternativa CORRETA:
