One of the central challenges for synthetic chemists is to impose control over free radicals. Highly reactive molecules with an unpaired electron, free radicals, may be familiar to you; these are the type of molecules we take antioxidant supplements for, in an effort to tame oxidative stress.
“Free radical chemistry is very useful for the synthesis of both bioactive small molecules and everyday polymers,” said UC Santa Barbara chemistry professor Yang Yang, an author of a paper on the matter that appears in Nature Catalysis. “However, imposing stereocontrol over free-radical mediated reactions has eluded the asymmetric catalysis community for decades. We’re trying to develop biocatalytic strategies to further push the boundaries of free radical chemistry.”
July 20 (Reuters) — Cerebras Systems on Thursday said that it has signed an approximately $100 million deal to deliver the first of what could be up to nine artificial intelligence (AI) supercomputers in a partnership with United Arab Emirates-based technology group G42.
The deal comes as cloud computing providers around the world are searching for alternatives to chips from Nvidia Corp (NVDA.O), the market leader in AI computing whose products are in short supply, thanks to the surging popularity of ChatGPT and other services. Cerebras is one of several startups looking to challenge Nvidia.
Silicon Valley-based Cerebras said that G42 has agreed to purchase three of what it calls its Condor Galaxy systems, all of which it will build in the U.S. to speed up the roll out. The first one will come online this year, with two more coming in early 2024.
A protein fragment from the brain could be used to track progression of Alzheimer’s disease. The tell-tale fragment of tau protein was detectable in the cerebrospinal fluid (CSF) of patients with the disease, and researchers now hope to develop a blood test using it.
Alzheimer’s is a disease of errant protein aggregates that include amyloid plaques and then later tau tangles. ‘Amyloid plaques begin to form about 10 to 20 years before the first symptoms of Alzheimer’s,’ says Randall Bateman, a neurologist at Washington University School of Medicine who helped lead the study. ‘Whereas tau tangles begin once the symptoms begin.’
Studies in two patient groups, each with hundreds of people, revealed that levels of the fragment in the CSF were indicative of tau clumps in the brain seen on imaging and were linked to symptoms of cognitive decline.
Developments in connectomics and network neuroscience over the past 20 years have led to new ways of investigating communication in complex brain networks. In this Review, Seguin, Sporns and Zalesky discuss the current landscape of models of brain network communication.
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Panpsychism is the idea that there is an element of consciousness in everything in the universe. The theory goes like this: You’re conscious. Ben Goertzel is conscious. And his hat is conscious too. What if consciousness isn’t about the brain at all, but it’s as inherent to our universe as space-time?“Now, panpsychism, to me, is not even that interesting, it’s almost obvious — it’s just the foundation, the beginning for thinking about consciousness… ” says Goertzel. It’s what comes after that excites him, like the emerging technology that will let us connect our minds to bricks, hats, earthworms, other humans, and super AGIs like Sophia, and perhaps glimpse at the fabric of consciousness. Goertzel believes brain-brain interfacing and brain-computer interfacing will unfold in the coming decades, and it’s by that means that we may finally crack the nut of consciousness to discover whether panpsychism makes any sense, and to learn why humans are so differently conscious than, for example, his hat.
Ben Goertzel is CEO and chief scientist at SingularityNET, a project dedicated to creating benevolent decentralized artificial general intelligence. He is also chief scientist of financial prediction firm Aidyia Holdings and robotics firm Hanson Robotics; Chairman of AI software company Novamente LLC; Chairman of the Artificial General Intelligence Society and the OpenCog Foundation. His latest book is AGI Revolution: An Inside View of the Rise of Artificial General Intelligence.
TRANSCRIPT:
BEN GOERTZEL: Consciousness is one of these great vexing and confusing words and concepts, which intelligent people take different positions on and could argue about forever. My own perspective on consciousness is rooted in what you could call a sort of panpsychism, by which I mean the idea that consciousness is in essence a property eminent in existence, as much as space and time are. I mean everything that we see around us somehow is situated in time and in space, in our space-time continuum; panpsychism is the idea that everything around us and within us has some element of consciousness to it also, so that it’s not really meaningful to think of: ‘Here’s this non-conscious matter and then there’s this thing called consciousness, which is attached to some matter and not to others.’ Now panpsychism to me is not even that interesting, it’s almost obvious — it’s just the foundation, the beginning for thinking about consciousness because then you have interesting questions like why is the consciousness associated with my brain so much more self-reflective and dynamic and in some senses intense than, say, the consciousness associated with my hat? I mean, it’s a cool hat, it may be more conscious than the average hat, but in the end the brain has these complex feedback loops, the brain can model itself, the brain responds very differently to slightly different stimuli coming in and many properties of the brain seem associated with the more powerful and dynamic states of consciousness that it has relative to other things. So, if you accept panpsychism, that everything is imbued somehow with an element of consciousness, some things can still be more conscious than others and some things are differently conscious than others. And then that’s where things get interesting.
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Ben Goertzel, Chief scientist of Hanson Robotics and co-creator of the world’s most famous android citizen, Sophia imagines how the “upload my mind” button will look like in the future.
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Remember what it’s like to twirl a sparkler on a summer night? Hold it still and the fire crackles and sparks but twirl it around and the light blurs into a line tracing each whirl and jag you make.
A new patented software system developed at Sandia National Laboratories can find the curves of motion in streaming video and images from satellites, drones and far-range security cameras and turn them into signals to find and track moving objects as small as one pixel. The developers say this system can enhance the performance of any remote sensing application.
“Being able to track each pixel from a distance matters, and it is an ongoing and challenging problem,” said Tian Ma, a computer scientist and co-developer of the system. “For physical security surveillance systems, for example, the farther out you can detect a possible threat, the more time you have to prepare and respond. Often the biggest challenge is the simple fact that when objects are located far away from the sensors, their size naturally appears to be much smaller. Sensor sensitivity diminishes as the distance from the target increases.”
