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Questão 69421

UNIFOR

(UNIFOR - 2020)

Samsung developing technology to create fake videos from one single photo.

With new technology like this in development, seeing will no longer mean believing.

news.com.au MAY 28, 2019

Researchers at Samsung’s Artificial Intelligence (AI) Centre in Moscow have created an algorithm that can generate videos using only one image. The development has caused some worry among technology experts and commentators, ¹who see it as a worrying step towards making fake content creation easier.

In a paper published in the preprint journal ArXiv, and in an accompanying video demo, the algorithm creates a video using a single still image, such as the Mona Lisa painting or a photo of Salvador Dali. The video can be created using one single image but the more images are used, the better the quality.

A sample of 32 images produces a video of near lifelike accuracy. Current AI systems usually require the algorithm to scan large sets of data of a body and face before it can produce a moving picture based on it. With this new technology, however, creating fake videos will become a lot easier. The Samsung algorithm was trained using the publicly available VoxCeleb database which has more than 7000 images of celebrities from YouTube videos.

Since the algorithm recognises common characteristics of a person’s face and body, as opposed to specific traits of a subject, it’s able to quickly extrapolate images with little input.

This method also means that the technology is applicable toward non-celebrities and can be used on anyone, even people ²who died a long time ago and were never captured on video. The AI is currently only able to produce “talking head” style videos from the shoulders up. Skeptics of deepfake technology, as it is referred to, worry it will be used to spread misinformation and fake news or to steal people’s identity.

O pronome relativo ‘who’, em negrito no texto, refere-se, respectivamente, a:

1. especialistas em tecnologia e comentaristas; 2. povos

1. especialistas em tecnologia e comentaristas; 2. pessoas

1. analistas em tecnologia e especialistas; 2. pessoas comuns

1. analistas em tecnologia e comentaristas; 2. pessoas comuns

1. comentaristas em tecnologia e especialistas; 2. pessoas comuns

Gabarito:

1. especialistas em tecnologia e comentaristas; 2. pessoas

Resolução:

Questão 1985

UNIFOR

(Unifor-2003)

O velho foi sendo injustamente recolhido a sua "inferioridade".

A palavra sublinhada na frase acima é formada de:

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Questão 3154

UNIFOR

(UNIFOR - 2014)

“Bohemian Rhapsody” é uma canção cuja letra foi escrita por Freddie Mercury, gravada originalmente pela banda Queen em 1975 no álbum A Night at the Opera. Esta canção possui uma estrutura musical incomum para a música popular, o que a faz ser considerada por muitos uma obra de rock progressivo. Suas seis sessões não possuem um refrão. Foi lançada como compacto e tornou-se um estrondoso sucesso comercial.

Is this the real life?

Is this just fantasy?

Caught in a landslide

No escape from reality

Open your eyes

Look up to the skies and see

I’m just a poor boy

I need no sympathy…

Nothing really matters (1)

Anyone can see (2)

Nothing really matters (3)

Nothing really matters to me (4)

Anyway the wind blows (5)

http://www.vagalume.com.br/queen/bohemian-rhapsody.html#ixzz2iwyl3son

Nos últimos versos, os pronomes nothing, anyone e anyway passam a ideia de:

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Questão 3214

UNIFOR

(UNIFOR - 2014) Leia as sentenças abaixo e marque a opção correta de acordo com o uso dos artigos definido e indefinido:

I. Can you play a guitar?
II. I once played the guitar which had only five strings.
III. She started learning the piano at the age of five.
IV. I’ve always had a flute, ever since I was a child.
V. I’m afraid the violin is an instrument I never mastered.

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Questão 8801

UNIFOR

(UNIFOR - CE)

A decomposição total de 100 g de carbonato de cálcio (CaCO₃) em óxido de cálcio e dióxido de carbono, que volume produzirá deste último quando medido a 1 atm e 25°C?

(Dados: volume molar de gás a 1 atm e 25 °C = 25 L/mol; massas molares, em g/mol: CaCO₃ = 100; CO₂ = 44.)

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