A permanent magnet begins to hover above a ceramic material as it cools and transitions to a superconducting state; the magnet remains aloft until the ceramic warms above a critical temperature.
The ceramic material is a 25mm disc of yttrium barium copper oxide (YBa2Cu3O7, also commonly referred to as \.
The new research centers on the use of LSPs to achieve atomic-level control of chemical reactions. A team has successfully extended LSP functionality to semiconductor platforms. By using a plasmon-resonant tip in a low-temperature scanning tunneling microscope, they enabled the reversible lift-up and drop-down of single organic molecules on a silicon surface.
The LSP at the tip induces breaking and forming specific chemical bonds between the molecule and silicon, resulting in the reversible switching. The switching rate can be tuned by the tip position with exceptional precision down to 0.01 nanometer. This precise manipulation allows for reversible changes between two different molecular configurations.
An additional key aspect of this breakthrough is the tunability of the optoelectronic function through atomic-level molecular modification. The team confirmed that photoswitching is inhibited for another organic molecule, in which only one oxygen atom not bonding to silicon is substituted for a nitrogen atom. This chemical tailoring is essential for tuning the properties of single-molecule optoelectronic devices, enabling the design of components with specific functionalities and paving the way for more efficient and adaptable nano-optoelectronic systems.
The active zone primes synaptic vesicles and clusters voltage-gated Ca2+ channels fast neurotransmitter release. Here the authors dissect the underlying molecular architecture and show that distinct protein machineries execute these functions.
Forget Hollywood depictions of gun-toting robots running wild in the streets – the reality of artificial intelligence is far more dangerous, warns the historian and author in an exclusive extract from his new book.
LLMs don’t just memorize word pairs or sequences—they learn to encode abstract representations of language. These models are trained on immense amounts of text data, allowing them to infer relationships between words, phrases, and concepts in ways that extend beyond mere surface-level patterns. This is why LLMs can handle diverse contexts, respond to novel prompts, and even generate creative outputs.
In this sense, LLMs are performing a kind of machine inference. They compress linguistic information into abstract representations that allow them to generalize across contexts—similar to how the hippocampus compresses sensory and experiential data into abstract rules or principles that guide human thought.
But can LLMs really achieve the same level of inference as the human brain? Here, the gap becomes more apparent. While LLMs are impressive at predicting the next word in a sequence and generating text that often appears to be the product of thoughtful inference, their ability to truly understand or infer abstract concepts is still limited. LLMs operate on correlations and patterns rather than understanding the underlying causality or relational depth that drives human inference.
LLMs are reshaping how we think by fostering deeper, sustained engagement and metacognition, potentially transforming our cognitive abilities.
LLMs can open new doors to cognitive and perhaps even conscious expansion, influencing how we experience and interpret the world.
Discover how cognitive connectivity, powered by LLMs, ignites creativity, fuels joyful curiosity, and transforms the way we think and learn, in the emerging Cognitive Age.
Common push puppet toys in the shapes of animals and popular figures can move or collapse with the push of a button at the bottom of the toys’ base. Now, a team of UCLA engineers has created a new class of tunable dynamic material that mimics the inner workings of push puppets, with applications for soft robotics, reconfigurable architectures and space engineering.
Inside a push puppet, there are connecting cords that—when pulled taut—will make the toy stand stiff. But by loosening these cords, the “limbs” of the toy will go limp. Using the same cord tension-based principle that controls a puppet, researchers have developed a new type of metamaterial, a material engineered to possess properties with promising advanced capabilities.
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