kairosfocus

Chicago Tribune: >>Stephen Hawking, the British physicist whose body was chained to a wheelchair by the ravages of a degenerative neuromuscular disease, but whose mind soared to the boundaries of the universe and beyond, died Wednesday morning in Cambridge, England. He was 76. His death came from complications of amyotrophic lateral sclerosis, more commonly known as Lou Gehrig’s disease, from which he had suffered since he was 20. “He was a great scientist and an extraordinary man whose work and legacy will live on for many years,” his children, Lucy, Robert and Tim, said in a statement obtained by the Associated Press. “His courage and persistence with his brilliance and humor inspired people across the world…. We will miss him Read More ›

Memristors are in effect tunable resistors; where a resistive state can be programmed [and changed, so far a very finite number of times]. This means they can store and process information, especially by carrying out weighted-product summations and vector-based matrix array product summations. Such are very powerful physically instantiated mathematical operations. For example, here is a memristor crossbar matrix: . . . and here is one in use to recognise patterns: They hold promise for AI, high density storage units and more. How they work turns out to be a bit of a challenge, as IEEE Spectrum reported in 2015: >>Over the last decade researchers have produced two commercially promising types of memristors: electrochemical metallization memory (ECM) cells, and valence Read More ›

One of the more astonishing points of debate that has come out at UD is that at least some defenders of the evolutionary materialistic view are prepared to argue for or assume as default that we have had a beginningless past for the physical world.  This has come up several times in recent years and was again discussed last week. I will share my take-away conclusion so far. But first, why are such willing to put up such a spectacularly untestable, unobservable claim? Because, we first know that non-being has no causal powers so if there were ever utter nothing, such would forever obtain. That a world manifestly is implies that SOMETHING always was. The question is what, given that Read More ›

. . . at age 99 years. Condolences to those who mourn. Thoughts? END

The hyperreals are an extension of the real number line that brings to bear a reciprocal relationship between the very large and the very small. By so introducing extensions to the real number continuum, it forms a base for an infinitesimals approach to the calculus and makes sense of a lot of the tricks used by early pioneers of Calculus from Leibniz and Newton to Euler and beyond. (Though, it is clear in retrospect that they missed a lot of the pathologies that are now part of the far more cautious approaches of today.) And yes, here is a case where Wikipedia does some good (likely, in a context where there are few basement trolls capable of making a mess): Read More ›

He continues (HT, BA77): >>Mathematicians are capable of grasping a world of objects that lies beyond space and time …. … Come again … DB: No need to come again: I got to where I was going the first time. The number four, after all, did not come into existence at a particular time, and it is not going to go out of existence at another time. It is neither here nor there. Nonetheless we are in some sense able to grasp the number by a faculty of our minds. Mathematical intuition is utterly mysterious. So for that matter is the fact that mathematical objects such as a Lie Group or a differentiable manifold have the power to interact with Read More ›

First, condolences and prayers for victims and families. Daily Mail has a useful header that seems to capture key themes to ponder as we head into the weekend: These was of course — within minutes — the usual talking point exchange on firearms, gun-free [= target-rich] zones, mental illness and effects of certain antidepressants, affiliations (Antifa and Islamism have also been suggested and there is a picture of him in a MAGA hat) and the like, etc. U/D: My email inbox has a link to Townhall that points to a claim that “Leon County law enforcement sources told the Tallahassee Democrat that they could not find information linking Cruz, 19, to the Republic of Florida Militia, as first reported by Read More ›

By 2012, the longstanding Encyclopedia Britannica had published its last print edition. Microsoft’s Encarta has long since bitten the dust, and so has Collier’s notable effort. Wikipedia, like it or lump it — mostly the latter — seems to have taken over that go-to first source slot. Indeed, for a great many subjects a Wikipedia article will dominate a Google search (or the like), to the point where one gets the impression that if it is not in the top three or so references, that was programmed in by the search engine’s programmers. And yet, as PJ Media reports, co-founder and original author of Wikipedia’s “neutral point of view [NPOV]” policy, Larry Sanger has gone on record, regarding Wiki’s entrenched Read More ›

With metal-like superionic water already on the table, why not look at the seemingly evasive metallic hydrogen? A year ago, there was a happy announcement (and an article in Science), but doubts have since been entertained; indeed Science issued a correction to the original paper. Science: >>Producing metallic hydrogen has been a great challenge in condensed matter physics. Metallic hydrogen may be a room-temperature superconductor and metastable when the pressure is released and could have an important impact on energy and rocketry. We have studied solid molecular hydrogen under pressure at low temperatures. At a pressure of 495 gigapascals, hydrogen becomes metallic, with reflectivity as high as 0.91. We fit the reflectance using a Drude free-electron model to determine the Read More ›

One of the things that struck me in looking at superionic water is how it is so often spoken of as though it were partly liquid and partly solid. I did a spot of reflection, which I am thinking it may help to headline. Where, some of the ideas being brought up will help us on the onward subject of looking at how memristors work. So, following up on the new form of water post: KF, 4: >>One of the interesting things about the coverage [on superionic water]  is how they phrased the properties of superionic ice in terms of being both a solid and a liquid. This may suggest to the public the notion of a contradictory state, which Read More ›

Water is of central interest to ID and to many other fields of study relevant to the cosmos and in the world of life. Accordingly, the recent experimental discovery of a predicted metal-like state with a grid of O atoms and with H+ ions flowing through, is significant news.  As NY Times reports: >>This new form, called superionic water, consists of a rigid lattice of oxygen atoms through which positively charged hydrogen nuclei move. It is not known to exist naturally anywhere on Earth, but it may be bountiful farther out in the solar system, including in the mantles of Uranus and Neptune . . . . [S]cientists at Lawrence Livermore first squeezed water between two pieces of diamond with Read More ›

One of the key ideas and driving assumptions of modern evolutionary materialistic scientism is that mind can be explained on brain without residue. In an extreme form, we can see it in Crick’s the Astonishing Hypothesis (1994): . . . that “You”, your joys and your sorrows, your memories and your ambitions, your sense of personal identity and free will, are in fact no more than the behaviour of a vast assembly of nerve cells and their associated molecules. As Lewis Carroll’s Alice might have phrased: “You’re nothing but a pack of neurons.” This hypothesis is so alien to the ideas of most people today that it can truly be called astonishing. Philip Johnson, of course, replied the next year, Read More ›

While scientific topics tied to AI are a main current focus — I will shortly add another headlined comment on why — there are several philosophical and theological topics that keep on coming up in and around UD. So, pardon a quick note on those wider themes. Here, on the soul and linked ideas from the thoughts on justice thread: JM, 155 to BA77: >>If you think I have not provided any evidence against the immortality of the soul, why don’t you answer my questions regarding the Adam and Eve scriptures?>> I picked this point up and responded: KF, 161: >>J-Mac, consider the scriptural definition of physical death: “as the body without the spirit is dead . . . ” Read More ›

Robo-Doc will see you? Maybe, but not just now. This item popped up from the usual suspect tabloid paper sites while searching on AI and memristors. I have tracked down a couple of more reputable sources so, here goes from China Daily (which is also on the spot): >>A robot has passed the written test of China’s national medical licensing examination, an essential entrance exam for doctors, making it the first robot in the world to pass such an exam. Its developer iFlytek Co Ltd, a leading Chinese artificial intelligence company, said on Thursday that the robot scored 456 points, 96 points higher than the required marks. The artificial-intelligence-enabled robot can automatically capture and analyze patient information and make initial Read More ›

Memristors [= memory + resistors] are a promising memory-based information storage technology that can work as non-volatile memory and in neural networks.  They were suggested c. 1971 by Leon Chua, and since HP created a TiO2-based multilayer architecture device exhibiting memristor capabilites in 2007, they have been a focus for research, given their potential. Here, we may ponder a crossbar array of memristor elements forming a signal-processing matrix: Memristors are of interest to AI as a means to effect neural networks. For instance, a crossbar network (as is illustrated just above) has been used to demonstrate powerful image processing. As Sheridan et al reported in Nature, May 22, 2017 (details pay-walled, of course . . . ): >>Sparse representation of Read More ›