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Oct 8, 2024

Gene therapy shows promise repairing brain tissue damaged by stroke

Posted by in categories: biotech/medical, neuroscience

Gene therapy shows promise in repairing damaged brain tissue from strokes.


From the NIH Director’s Blog by Dr. Francis Collins.

It’s a race against time when someone suffers a stroke caused by a blockage of a blood vessel supplying the brain. Unless clot-busting treatment is given within a few hours after symptoms appear, vast numbers of the brain’s neurons die, often leading to paralysis or other disabilities. It would be great to have a way to replace those lost neurons. Thanks to gene therapy, some encouraging strides are now being made.

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Oct 8, 2024

This AI Paper from Google Introduces Selective Attention: A Novel AI Approach to Improving the Efficiency of Transformer Models

Posted by in category: robotics/AI

Transformers have gained significant attention due to their powerful capabilities in understanding and generating human-like text, making them suitable for various applications like language translation, summarization, and creative content generation. They operate based on an attention mechanism, which determines how much focus each token in a sequence should have on others to make informed predictions. While they offer great promise, the challenge lies in optimizing these models to handle large amounts of data efficiently without excessive computational costs.

A significant challenge in developing transformer models is their inefficiency when handling long text sequences. As the context length increases, the computational and memory requirements grow exponentially. This happens because each token interacts with every other token in the sequence, leading to quadratic complexity that quickly becomes unmanageable. This limitation constrains the application of transformers in tasks that demand long contexts, such as language modeling and document summarization, where retaining and processing the entire sequence is crucial for maintaining context and coherence. Thus, solutions are needed to reduce the computational burden while retaining the model’s effectiveness.

Approaches to address this issue have included sparse attention mechanisms, which limit the number of interactions between tokens, and context compression techniques that reduce the sequence length by summarizing past information. These methods attempt to reduce the number of tokens considered in the attention mechanism but often do so at the cost of performance, as reducing context can lead to a loss of critical information. This trade-off between efficiency and performance has prompted researchers to explore new methods to maintain high accuracy while reducing computational and memory requirements.

Oct 8, 2024

What Intelligent Machines Need to Learn From the Neocortex

Posted by in category: neuroscience

Machines won’t become intelligent unless they incorporate certain features of the human brain. Here are three of them.

Oct 8, 2024

Mitigating noise in digital and digital–analog quantum computation

Posted by in categories: computing, quantum physics

The authors explore the digital-analog quantum computing paradigm, which combines fast single-qubit gates with the natural dynamics of quantum devices. They find the digital-analog paradigm more robust against certain experimental imperfections than the standard fully-digital one and successfully apply error mitigation techniques to this approach.

Oct 8, 2024

Humanity faces a ‘catastrophic’ future if we don’t regulate AI, ‘Godfather of AI’ Yoshua Bengio says

Posted by in categories: existential risks, robotics/AI

Yoshua Bengio played a crucial role in the development of the machine-learning systems we see today. Now, he says that they could pose an existential risk to humanity.

Oct 8, 2024

Chip gives edge in quantum computing

Posted by in categories: computing, quantum physics

China’s efforts to scale up the manufacture of superconducting quantum computers have gathered momentum with the launch of the country’s independently developed third-generation Origin Wukong, said industry experts on Monday.

The latest quantum computer, which is powered by Wukong, a 72-qubit indigenous superconducting quantum chip, has become the most advanced programmable and deliverable superconducting quantum computer currently available in China.

The chip was developed by Origin Quantum, a Hefei, Anhui province-based quantum chip startup. The company has already delivered its first and second generations of superconducting quantum computers to the Chinese market.

Oct 8, 2024

The way sensory prediction changes under anesthesia could reveal how conscious cognition works

Posted by in categories: media & arts, neuroscience

Our brains constantly work to make predictions about what’s going on around us, for instance to ensure that we can attend to and consider the unexpected. A new study examines how this works during consciousness and also breaks down under general anesthesia. The results add evidence for the idea that conscious thought requires synchronized communication—mediated by brain rhythms in specific frequency bands—between basic sensory and higher-order cognitive regions of the brain.

Previously, members of the research team in The Picower Institute for Learning and Memory at MIT and at Vanderbilt University had described how enable the brain to remain prepared to attend to surprises.

Cognition-oriented brain regions (generally at the front of the brain), use relatively low frequency alpha and beta rhythms to suppress processing by sensory regions (generally toward the back of the brain) of stimuli that have become familiar and mundane in the environment (e.g. your co-worker’s music). When sensory regions detect a surprise (e.g. the office fire alarm), they use faster frequency gamma rhythms to tell the higher regions about it and the higher regions process that at gamma frequencies to decide what to do (e.g. exit the building).

Oct 8, 2024

Sam Altman’s AI Device Just Changed the Game—Is Humanity Ready?

Posted by in categories: media & arts, robotics/AI

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

Oct 8, 2024

Are Digital Memories Enhancing or Altering Our Autobiographical Past?

Posted by in category: health

Summary: Digital technology has transformed how we document and recall life experiences, from capturing every moment with photos to tracking our health data on smart devices. This increased density of digital records offers potential benefits, like enhancing memory for personal events or supporting those with memory impairments.

However, it also raises concerns, such as privacy risks and the potential for manipulation through technologies like deepfakes. Researchers emphasize the need for further study to understand both the opportunities and risks posed by digital memory aids as they become more integral to how we remember.

Oct 8, 2024

ChatGPT-4 passes the Turing Test for the first time: There is no way to distinguish it from a human being

Posted by in category: robotics/AI

ChatGPT-4 passes the Turing Test, marking a new milestone in AI. Explore the implications of AI-human interaction.

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