Veículo

• Home
• Veículos
• Tech and Science Post

Just as drivers in Brazil can be warned of traffic congestion ahead or a vehicle parked on the hard shoulder, notifications may soon pop up on their smartphone or on their car's computer screen to warn them in real time that an anteater, wolf or tapir is crossing the highway. No human will necessarily need to see the animal in question or press a control button to send the warning.   For this to be possible, a key step is construction of a computer vision model that automatically [...]

The transition from the fifth to the fourth century BCE (Before the Common Era) seems to have been a critical period for the Central Andes, a region now part of Peru. Researchers have found evidence of turbulence during the passage from the Middle Formative period (1200–400 BCE) to the Late Formative period (400–1 BCE). Political disintegration and intergroup violence were apparently part of the context, possibly associated with a shift from theocracy to secular government. A new [...]

Magnetic moment is an intrinsic property of a particle with spin, arising from interaction between the particle and a magnet or other object with a magnetic field. Like mass and electric charge, magnetic moment is one of the fundamental magnitudes of physics. There is a difference between the theoretical value of the magnetic moment of a muon, a particle that belongs to the same class as the electron, and the values obtained in high-energy experiments conducted in particle accelerators. The [...]

Reptiles that live in sandy soils in dry areas and tolerate high temperatures have been considered beneficiaries of global warming as suitable habitats expand owing to climate change. However, a study by Brazilian researchers shows this is not necessarily the case, according to an article published in the Journal of Arid Environments. “We concluded that climate change will modify the geographical distribution of reptiles and lead to the extinction of some species. [...]

Statistics made available in January 2024 show that while deforestation in the Amazon fell by half in 2023, it increased by 43% in the Cerrado, the Brazilian savanna. A research group at the State University of Campinas's Institute of Biology (IB-UNICAMP) in Brazil dedicated to ecological studies on the Cerrado has already highlighted the urgency of combating destruction of the biome. However, it is not enough to defend what remains: restoration is also needed. Restoration presents a [...]

In an article published in the Journal of Materials Chemistry C , Brazilian researchers describe a strategy to enhance the efficiency and stability of solar cells made of perovskite, a semiconductor material produced in the laboratory. The results of the project could be highly positive for the future of the solar power sector. Developed by researchers at São Paulo State University (UNESP) in Bauru, Brazil, the method involves the use of a class of materials known as MXenes, a family [...]

The Amazon rainforest could approach a tipping point, which could lead to a large-scale collapse with serious implications for the global climate system. A new Nature study by an international research team including scientists from the Potsdam Institute for Climate Impact research (PIK) reveals that up to 47% of the Amazonian forest is threatened and identifies climatic and land-use thresholds that should not be breached to keep the Amazon resilient. "The Southeastern [...]

Researchers at the University of São Paulo (USP) and the Federal University of Viçosa (UFV) in Brazil have developed a sustainable sensor that can be placed directly on the surface of a vegetable or fruit to detect the presence of pesticides. Known for this reason as “plant-wearable,” it is made of cellulose acetate, a material derived from wood pulp. The device has the potential to help assure food safety in a world that increasingly suffers from a shortage of food [...]

A study led by scientists at the University of São Paulo (USP) in Brazil has shown that the Rio Grande Rise (RGR), a possibly continental basaltic plateau and chain of seamounts now submerged in the South Atlantic Ocean some 1,200 km from the coast of Brazil, was once a giant tropical island, rich in minerals and covered with vegetation. Geologists have dated sediments from the formation to between 45 million and 40 million years ago. The study, which involved almost 10 years of [...]