Leonardo Coelho
(He/Him)
Brazil
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Articles by Leonardo Coelho
Toward a world model for corrosion science
Abstract Corrosion is a trajectory, not an event, yet current machine learning maps fixed inputs to outputs and cannot model reliably how a corroding interface responds to intervention. We argue that world models, deep learning frameworks that learn latent physical dynamics from observation sequences, can close this gap. A physically interpretable latent space anchored to corrosion mechanisms can enable prediction, counterfactual reasoning, and discovery. We chart a path toward realising it.
Expandindo horizontes: o viajar como ferramenta de investigação da forma urbana
IdiomacatalàDeutschEnglishespañoleuskarafrançaisgalegoitalianoportuguêsromână
Überwachung und digitale Sicherheit: Europäische Gesichtserkennung für brasilianische Schulkinder
Der Unterricht an 1.700 Schulen im südbrasilianischen Bundesstaat Paraná beginnt mit einem Ritual: Die Lehrkraft öffnet eine App, fotografiert das Klassenzimmer, und in Sekunden gleicht ein Algorithmus die Gesichter mit einer biometrischen Datenbank ab. Wer erkannt wird, gilt als anwesend. Seit 2023 ist diese Gesichtserkennung in Paraná im Einsatz, um täglich fast eine Million Kinder zu identifizieren. Doch das System irrt.
Led Zeppelin: as 20 melhores músicas da banda em um ranking autoral comentado
O Led Zeppelin construiu uma das discografias mais impressionantes da história do rock. Entre blues pesado, folk, hard rock, experimentação e momentos épicos, a banda deixou um catálogo que atravessa gerações e dificulta qualquer tentativa de ranking. Ainda assim, encarei o desafio e organizei abaixo a minha lista com as 20 melhores músicas do grupo, levando em conta composição, interpretação, peso histórico e, claro, o impacto que cada faixa causa em mim como ouvinte.
From data centers to digital labor, Brazilian journalist tracks AI’s impact in the Global South
By March 24, 2026 When people talk about artificial intelligence (AI), the focus is often on new language models, processing speed and potential uses. Far less attention is paid to the costs of the ecosystem: resource extraction, institutional opacity, underpaid labor, massive infrastructure, and widespread impacts on ecosystems and communities where these projects take root.
Sistema de reconhecimento facial monitora alunos no Brasil
No Colégio Estadual Professor Loureiro Fernandes, escola pública de ensino médio no estado do Paraná, no sul do Brasil, uma aula começa como qualquer outra. O professor abre um aplicativo no celular, levanta o aparelho e tira várias fotos da sala. Em segundos, as imagens são enviadas para um servidor em nuvem, onde um algoritmo de reconhecimento facial detecta o rosto de cada estudante, extrai essas imagens e as compara com um banco de dados de perfis biométricos.
EU-made facial recognition ended up scanning schoolchildren in Brazil
When the European Union agreed its landmark AI Act in December 2023, Commission president Ursula von der Leyen declared it a “historic moment”, saying the legislation “transposes European values to a new era.” Since then, the EU has positioned itself as the global standard-setter for trustworthy AI. At the AI Action Summit in Paris in February 2025, von der Leyen pledged that Europe would “spare no effort to make Europe an AI continent,” insisting that safety and innovation must go hand in hand.
Facial Recognition Rejected In Europe Is Monitoring Brazil’s Schoolchildren
As Europe tries to restrict AI technologies at home, systems developed on the continent are being rolled out overseas. Reporting by Investigate Europe, published in partnership with Tech Policy Press, tracks how Europe-made biometric software has embedded itself into Brazil’s education sector — with potential consequences far beyond the classroom. This story was supported by the Pulitzer Center’s AI Accountability Network.
V Európe je neprijateľná, v Brazílii biometria zo Slovenska ďalej monitoruje dochádzku školákov if (typeof cabrioST=="function") cabrioST(5193272,"");
Text vznikol pod vedením novinárskeho tímu Investigate Europe v spolupráci so Sieťou pre AI zodpovednosť Pulitzerovho centra a médiami Tech Policy Press (USA), Nucleo (Brazília), Público (Portugalsko), EU Observer (Belgicko) a Denník N (Slovensko). Na štátnej strednej škole nazvanej podľa profesora Loureira Fernandesa v juhobrazílskom štáte Paraná sa začína vyučovacia hodina ako každá iná. Vtom učiteľ otvorí aplikáciu v telefóne, zdvihne ho a urobí niekoľko fotografií triedy.
¿IA para quién?’: los centros de datos en Brasil preocupan por el consumo de agua y energía
RÍO DE JANEIRO – La capacidad de los centros de datos de Brasil podría triplicarse para 2030. Esta expansión está impulsada por las empresas de China y Estados Unidos que están llegando en masa al país, pero las implicaciones para el consumo local de agua y energía preocupan a los expertos. El país ya es el centro neurálgico de los centros de datos de América Latina, con una capacidad instalada de alrededor de 800 megavatios (MW).
¿IA para quién?: los centros de datos en Brasil preocupan por el consumo de agua y energía
Fuentes: dialogue.earth/ [Imagen: Molinos eólicos en São Gonçalo do Amarante, estado de Ceará, en el noreste de Brasil. Esta ciudad de solo 54 mil habitantes podría albergar uno de los proyectos de centros de datos más grandes del país.
‘IA para quem?’: Entenda o boom de data centers no Brasil
Sobre nós Jornalismo Ambiental → Popular agora 1 Reportagens ‘IA para quem?’: Entenda o boom de data centers no Brasil 2 Salada Verde Edital destina R$ 800 mil para prevenção de incêndios no Cerrado de Goiás 3 Análises Mulheres são a força estratégica da restauração florestal brasileira Biodiversidade | Clima | Politica Ambiental Reportagens Projeto do governo para o setor está parado no Legislativo, enquanto especialistas apontam riscos socioambientais e falhas de governança Turbinas eólicas...
‘AI for whom?’ Inside Brazil’s data centre boom
Brazil’s data centre capacity could triple by 2030, fuelled by companies from China and the US flocking to the country. The implications for local water and energy consumption are worrying experts. Brazil is already Latin America’s data centre hub, with an installed capacity of around 800 megawatts (MW). The country has 198 facilities according to the Data Center Map, which gathers information on both operating and planned facilities worldwide.
“¿IA para quién?”: los centros de datos en Brasil preocupan por el consumo de agua y energía
La capacidad de los centros de datos de Brasil podría triplicarse para 2030. Esta expansión está impulsada por las empresas de China y Estados Unidos que están llegando en masa al país, pero las implicaciones para el consumo local de agua y energía preocupan a los expertos. El país ya es el centro neurálgico de los centros de datos de América Latina, con una capacidad instalada de alrededor de 800 megavatios (MW).
The Marajoara Wrestling: between vernacular practice and institutionalization
Ayuda Buscar en la ayuda Buscar en la ayuda The Marajoara Wrestling: between vernacular practice and institutionalization Autores: Leonardo Coelho, Pedro Henrique Martins Valério, Cristiano Roque Antunes Barreira Localización: Revista de Artes Marciales Asiáticas (RAMA), ISSN-e 2174-0747, Vol. 20, Nº. 1, 2025, págs.
À procura do filho
O cheiro acre de morte no ar, misturado ao do orvalho, se espalhava pela Praça São Lucas, onde termina o bairro da Penha e começam as favelas do complexo de mesmo nome, na Zona Norte do Rio. Já passava de meia-noite e meia. Em frente ao supermercado Inter, formava-se uma roda com cerca de duzentas pessoas, entre trabalhadores, estudantes, aposentados e pessoas ligadas ao tráfico.
Voice bot: como melhora o pós-venda no varejo?
Você já se sentiu preso em um labirinto telefônico, ouvindo músicas de espera intermináveis apenas para ser transferido diversas vezes, repetindo sua solicitação a cada novo atendente? A experiência no pós-venda pode ser uma verdadeira dor de cabeça para muitas pessoas, ainda mais no varejo, um setor que lida, naturalmente, com um grande volume de demandas.
Voice bot: how does it improve post-sales in retail?
Have you ever felt trapped in a telephone maze, listening to endless hold music just to be transferred multiple times, repeating your request to each new agent? The post-sales experience can be a real headache for many people, especially in retail, a sector that naturally handles a high volume of demands.
Entre armas e bocas de fumo
Sob a égide das árvores que refrescam o cruzamento da Rua Sá Ferreira com a Avenida Nossa Senhora de Copacabana, no bairro homônimo do Rio de Janeiro, um grupo de oito israelenses, trajando bermudas jeans e camisetas básicas e surradas, se reúne ao redor de Luiz Fernando de Souza Lourenço, um senhor retinto de 62 anos de idade. São nove da manhã de 13 de maio e ele ostenta um black power com poucos fios grisalhos e inúmeras correntes de ouro no pescoço.
Extremely lifelike dolls are causing a frenzy in Brazil
SAO PAULO - A young woman posts a video that appears to show her holding her baby, Bento, and packing his bag for a trip to the hospital. She calls it “one of the busiest and scariest days for me.” She grabs onesies, a bottle and medical documents and tucks him in the back of a car. At the hospital, he is weighed and lies in a bed, where she removes his pacifier, bottle-feeds him and wipes a few drops of formula from his cheek.
Extremely Lifelike Dolls Cause a Frenzy in Brazil Original
To some, the dolls, known as reborn dolls, provide comfort, escape or just plain fun. But politicians across Brazil have tried to pass bills banning the dolls from public spaces. Juliana Drusz Magri, whose collection has grown to 22 dolls, at her home in Curitiba, Brazil. Credit... Priscila Ribeiro for The New York Times To some, the dolls, known as reborn dolls, provide comfort, escape or just plain fun. But politicians across Brazil have tried to pass bills banning the dolls from public spaces.
Armas, drogas, carros e macacos: Comando Vermelho usa o WhatsApp para vender de tudo
Em meio a uma chuva de ofertas num grupo de WhatsApp que vão de Ipad Pro a R$ 6,5 mil até uma motocicleta Kawasaki Ninja 650 cilindradas por R$ 8 mil, um membro posta a seguinte mensagem: “Macaco prego fêmea super mansa muito dócil precinho pra sair hoje 3mil”. Logo depois, outro usuário oferece uma submetralhadora GHK Calibre 40 e uma pistola 9mm com kit rajada e lata de Glock. Total? R$ 12 mil. E novas mensagens não param de chegar no grupo Monopólio RJ Venda de Tudo.
Como a guerra entre grupos criminosos fez a violência explodir na Zona Oeste do Rio
Luis Antonio da Silva Braga é um homem cristalizado pela imagem tranquila de seu rosto branco, com sobrancelhas arqueadas nas pontas, nariz estreito e um cabelo espetado à moda dos anos 1990. Ao pescoço, uma corrente de ouro entrega o estereótipo clássico do subúrbio carioca: Luiz ou Zinho, como é conhecido nas terras fluminenses, é um miliciano — uma tipologia para membros de grupos armados paramilitares que gerenciam mercados lícitos e ilícitos por meio da força.
A small plane crashed into a road in São Paulo, Brazil, around 7:20 a.m. local time Friday, killing both people on board and injuring several people on the ground, according to the city's fire department. Six people sustained minor injuries and were not in serious condition. One of them was a motorcyclist who was passing by. The other five were passengers on a bus that was struck by a part of the plane, according to Capt. Ronaldo Melo, a spokesman for São Paulo's fire department.
Porto Alegre could still be dry if its flood protection systems worked
Brazil Floods Residents complain that the official response to catastrophic floods in Rio Grande do Sul state has been slow and insufficient, and say civil society has stepped in to fill the gap 5 min read Floods are a common occurrence in Brazilian cities. Every year, thousands of regions nationwide suffer from deluges worsened by a notorious lack of urban planning amid a climate emergency of which developing nations bear the brunt.
Porto Alegre could still be dry if its flood protection systems worked
Rio Grande do Sul Floods Residents complain that the official response to catastrophic floods in Rio Grande do Sul state has been slow and insufficient, and say civil society has stepped in to fill the gap 5 min read Floods are a common occurrence in Brazilian cities. Every year, thousands of regions nationwide suffer from deluges worsened by a notorious lack of urban planning amid a climate emergency of which developing nations bear the brunt.
O pai, a mãe e os espíritos santos
Um cursivo Jesus em vermelho sangue estampa a parede suja. Abaixo dele, dois anjos amarelados, com as mãos abertas para cima, aguardam a bênção divina. O púlpito de concreto mal-ajambrado ladeia um ferro-velho na Avenida Pastor Martin Luther King, em frente à entrada do Complexo da Pedreira, na Zona Norte do Rio de Janeiro.
Bolsonaro se escondió temporalmente en la embajada de Hungría
El 8 de febrero, la policía federal de Brasil confiscó el pasaporte del expresidente Jair Bolsonaro y arrestó a dos de sus exasesores principales bajo acusaciones de que habían planeado un golpe de Estado tras la derrota de Bolsonaro en las elecciones presidenciales de 2022. Cuatro días después, Bolsonaro estaba en la entrada de la embajada de Hungría en Brasil, esperando a que lo dejaran entrar, según imágenes de las cámaras de seguridad de la embajada, obtenidas por The New York Times.
Bolsonaro, Facing Investigations, Hid at Hungarian Embassy Original
On Feb. 8, Brazil's federal police confiscated former President Jair Bolsonaro's passport and arrested a pair of his former aides on accusations that they had plotted a coup after Mr. Bolsonaro lost the 2022 presidential election. Four days later, Mr. Bolsonaro was at the entrance to the Hungarian Embassy in Brazil, waiting to be let in, according to the embassy's security-camera footage, which was obtained by The New York Times.
Cases of violence put Rio delivery workers on edge
Tech Rio de Janeiro has become a hotspot for violence against delivery drivers in Brazil, leading to talks of strike among these gig workers 8 min read Food delivery apps are booming worldwide. In Brazil’s cities, the sight of zooming motorbikes and bicycles with delivery boxes bearing the logos of major apps has become a common part of the urban landscape.
Brazil’s delivery leader opened a facility for assaulted workers. No one’s shown up
Behind an unmarked metal door, nestled between an optical shop and a grocery store in the suburbs of Rio de Janeiro, lies iFood’s latest effort to protect its delivery workers: a safe space where they can access legal and psychological help. The facility, launched in January by Brazil’s biggest food delivery company, is a nondescript room, with a few desks and beige-and-white couches.
Taylor Swift: ‘New York Times’ descreve ‘planos arruinados, calor extremo e decepção’ no Rio
Taylor Swift foi recebida no Brasil nesta quinta-feira por uma projeção que fez com que a mundialmente famosa estátua do Cristo Redentor, no Rio de Janeiro, parecesse estar vestida com uma camiseta semelhante à que ela usou no videoclipe You Belong to Me e decorada com nomes de estados brasileiros e símbolos de suas músicas. Mas a tragédia e os problemas sucederam essa recepção calorosa. Uma fã morreu no calor sufocante do show de sexta à noite no Rio de Janeiro.
After Eras Tour triumphs, Taylor Swift finds trouble in Brazil
Thousands of fans had already traveled to the stadium in Rio de Janeiro by the time the show on Saturday was called off because of safety concerns.
After Eras Tour triumphs, Taylor Swift finds trouble in Brazil
Amanda Holpuch, Flávia Milhorance and Leonardo Coelho Taylor Swift was welcomed to Brazil on Thursday by a projection that made the world-famous Christ the Redeemer statue in Rio de Janeiro appear as if it were clad in a T-shirt similar to the one she wore in her “You Belong to Me” music video and was decorated with the names of Brazilian states and symbols from her songs. But tragedy and trouble have followed that warm welcome.
Fan dies at Taylor Swift concert in Rio’s extreme heat
By Jack Nicas, Leonardo Coelho and Flávia Milhorance One fan died and many others fainted at Taylor Swift’s concert Friday in Rio de Janeiro, where temperatures felt like nearly 140 degrees Fahrenheit, a record for the city, and fans said they struggled to get water. Ana Clara Benevides, 23, lost consciousness at the concert and later was pronounced dead of cardiac arrest after being taken to the hospital, according to city officials and the Brazilian company organizing the show, Time for Fun.
After Eras Tour triumphs, Taylor Swift finds trouble in Brazil
Taylor Swift was welcomed to Brazil on Thursday by a projection that made the world-famous Christ the Redeemer statue in Rio de Janeiro appear as if it were clad in a T-shirt similar to the one she wore in her "You Belong to Me" music video and was decorated with symbols from her songs. Everything to know about the Palace of Fine Arts But tragedy and trouble have followed that warm welcome. A fan died in the sweltering heat at Friday night's show in Rio de Janeiro.
Fan Dies at Taylor Swift Concert in Rio’s Extreme Heat
Many fans fell sick at the show, where temperatures broke records and concertgoers complained of a lack of water. Saturday’s show could be even hotter. Jack Nicas, Leonardo Coelho and Jack Nicas reported from Buenos Aires, and Leonardo Coelho and Flávia Milhorance from Rio de Janeiro. Nov. 18, 2023, 11:49 a.m. ET Sign up for Your Places: Extreme Weather. Get notified about extreme weather before it happens with custom alerts for places in the U.S. you choose.
Fan Dies at Taylor Swift Concert in Rio’s Extreme Heat
Americas|Fan Dies at Taylor Swift Concert in Rio’s Extreme Heat https://www.nytimes.com/2023/11/18/world/americas/taylor-swift-fan-dies-brazil.html Many fans fell sick at the show, where temperatures broke records and concertgoers complained of a lack of water. Saturday’s show could be even hotter. Jack Nicas, Leonardo Coelho and Jack Nicas reported from Buenos Aires, and Leonardo Coelho and Flávia Milhorance from Rio de Janeiro. Nov.
PF ouve executivos do Google sobre suposto lobby contra PL 2630
Após o Supremo Tribunal Federal ter autorizado instaurar um inquérito sobre os comunicados do Telegram e do Google contra o projeto de lei 2630, agora é a vez da Polícia Federal entrar em cena. A instituição já tomou depoimento de executivos do Google, que disseram ter gasto cerca de 2 milhões de reais em anúncios sobre o PL.
Comitê de Supervisão da Meta contraria decisão da empresa sobre 8.jan
O Comitê de Supervisão da Meta, órgão independente responsável por revisar casos de moderação de conteúdo, anunciou com atraso sua decisão nos casos relacionados à incitação de violência política associada aos ataques de 8.jan.2023. Originalmente a decisão seria divulgada dia 7 de junho. Ronaldo Lemos, professor e advogado brasileiro que é membro do Comitê, tweetou o resultado. CONTEXTO.
YouTube priorizou vídeos com críticas ao PL 2630 (relatório)
O sistema de recomendações do YouTube priorizou vídeos com críticas negativas ao PL 2630, o chamado PL das Fake News (ou PL da Censura, como a direita chama), em detrimento de canais com visões positivas ao projeto, de acordo com uma nova pesquisa. O estudo simulou várias experiências possíveis apresentadas a usuários da plataforma ao buscar informações sobre o projeto de lei, bem como as recomendações do próprio site após a visualização de cada vídeo.
George Santos Settles Stolen-Check Case in Brazil
George Santos's Troubles His Fading Online Celebrity House Expulsion Lies, Charges and Questions Oct. 10 Indictment 2022 Times Investigation George Santos's Troubles His Fading Online Celebrity House Expulsion Lies, Charges and Questions Oct. 10 Indictment 2022 Times Investigation The first-term congressman of New York accepted responsibility for his actions and agreed to pay a settlement in exchange for the charges to be dropped.
Brazil's Escalation of Facial Recognition Alarms Human Rights Experts
Police in Brazil are using facial recognition to identify protesters who rampaged through government buildings, escalating state surveillance in a move that has alarmed privacy and human rights experts. Thousands of protesters vandalized Brazil’s Supreme Court, Congress and presidential offices in Brasilia on January 8, seeking to oust leftist President Luiz Inácio Lula da Silva, who narrowly defeated incumbent Jair Bolsonaro in October’s vote.
Brazil turns facial recognition on rioters despite racism fears
Police in Brazil plan on using facial recognition to identify protesters who rampaged through government buildings, escalating state surveillance in a move that has alarmed privacy and human rights experts. Thousands of protesters vandalised Brazil’s Supreme Court, Congress and presidential offices in Brasilia last Sunday, seeking to oust leftist President Luiz Inacio Lula da Silva, who narrowly defeated incumbent Jair Bolsonaro in October’s vote.
Brazil turns facial recognition on rioters despite racism fears
Police in Brazil plan on using facial recognition to identify protesters who rampaged through government buildings, escalating state surveillance in a move that has alarmed privacy and human rights experts. Thousands of protesters vandalized Brazil's Supreme Court, Congress and presidential offices in Brasilia on Sunday, seeking to oust leftist President Luiz Inacio Lula da Silva, who narrowly defeated incumbent Jair Bolsonaro in October's vote.
Voices on social media summoned protesters to Brasília, offering free transportation and food
Days before supporters of Jair Bolsonaro, Brazil’s former far-right president, laid siege to the capital, Brasília, on Sunday, social media platforms were flooded by calls to organize attacks against critical infrastructure, with oil refineries and roadblocks among the main targets. The instigators of Sunday’s riots have not been publicly identified. But in the days after Luis Inácio Lula da Silva was sworn in as president Jan.
Junto con millones de brasileños, los candidatos acuden a las urnas
Send any friend a story As a subscriber, you have 10 gift articles to give each month. Anyone can read what you share. Luiz Inácio Lula da Silva, quien quiere volver a la presidencia, votó el domingo en São Bernardo do Campo, São Paulo.Credit...Victor Moriyama para The New York Times Oct. 30, 2022, 11:36 a.m. ET RÍO DE JANEIRO — Entre los primeros brasileños que votaron el domingo estaban los candidatos Jair Bolsonaro, actual presidente, y su contrincante de izquierda, Luiz Inácio Lula da Silva.
Along with millions of Brazilians, Bolsonaro and Lula also headed to the polls.
Americas|Along with millions of Brazilians, Bolsonaro and Lula also headed to the polls. https://www.nytimes.com/2022/10/30/world/americas/along-with-millions-of-brazilians-bolsonaro-and-lula-also-head-to-the-polls.html Send any friend a story As a subscriber, you have 10 gift articles to give each month. Anyone can read what you share.
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