Lifeboat Foundation

Scientists are watching with concern as India prepares to break ground on a long-delayed plan to connect the country’s rivers.

Memristors with controllable resistive switching (RS) behavior have been considered as promising candidates for synaptic devices in next-generation neuromorphic computing. In this work, two-terminal memristors with controllable digital and analog RS behavior are fabricated based on two-dimensional (2D) WSe₂ nanosheets. Under a relatively high operating voltage of 4 V, the memristor demonstrates stable and reliable non-volatile bipolar digital RS with a high switching ratio of 6.3 × 10⁴. On the other hand, under a relatively low operation voltage, the memristor exhibits analog RS with a series of tunable resistance states. The fabricated memristors can work as an artificial synapse with fundamental synaptic functions, such as long-term potentiation (LTP) and depression (LTD) as well as paired-pulse facilitation (PPF). More importantly, the memristor demonstrates high conductance modulation linearity with the calculated nonlinear parameter for conductance as-0.82 in the LTP process, which is beneficial to improving the accuracy of neuromorphic computing. Furthermore, the neuromorphic computing of file types and image recognition can be emulated based on a constructed three-layer artificial neural network (ANN) with a recognition accuracy that can reach up to 95.9% for small digits. In addition, memristors can be used to emulate the learning-forgetting experience of the human brain. Consequently, the memristor based on 2D WSe₂ nanosheets not only exhibits controllable RS behavior but also simulates synaptic functions and is expected to be a potential candidate for future neuromorphic computing applications.

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Beneath the Antarctic ice, scientists find remnants of a giant river system that flowed for thousands of miles.

By Kristel Tjandra & LiveScience

Geologists digging into the massive ice sheet of West Antarctica have discovered the remains of an ancient river system that once flowed for nearly a thousand miles.

Regional authorities in Brazil on Monday declared a state of emergency as the Pantanal, the world’s largest tropical wetlands, faces “out of control fires,” according to a decree.

The surge of fires before the peak of the dry season has raised alarm for the Pantanal, which extends into Bolivia and Paraguay and is home to a rich array of wildlife, including the world’s highest density of jaguars.

The six-month state of emergency was declared by the state of Mato Grosso do Sul, home to much of the wetlands in Brazil.

This register-based, case-control, follow-up study explores long-term mortality, recovery, and vocational status after a maternal stroke:

Background and Objectives.

Researchers develop flexible metasurfaces using industrial knitting techniques, potentially revolutionizing portable antennas and electromagnetic devices for communications and sensing.

In new research, people with severe alcohol use disorder tended to have greater difficulty forming new social memories. And, while they had better immediate recall of positive than negative social cues, for longer-term memories, they tended to remember more negative experiences than positive ones.

Good quality friendship has a significant impact on how young people affected by childhood trauma respond to social exclusion.

Brighter with Herbert.