Andrzej Białas na AGH Julia Hartwig Bogdan Białek Wilhelm Sasnal Tarnowskie Góry Mapa widoków z Ratusza TG Nagroda Turowicza Lab C-14 Muzeum Śląskie Kazimiera Szczuka Wojciech Plewiński
Cytaty, ostatni miesiąc (tu są wszystkie, większą czcionką)
smart appliances are revolutionizing commerce
… Internet of Things
… not to mention light bulbs, sex toys, toilets, pet feeders, and a children’s thermos
… Alexa .. Amazon has been learning when some customers wake up, go to work, listen to the news, play with their kids, and go to sleep.
… a fundamental shift in the relationship between customers and companies
… when an appliance is sending a constant stream of data back to its maker
… to push prices as low as possible in order to build your customer base /17-10-17
Wystąpienie Prezesa Polskiej Akademii Umiejętności
podczas Narodowego Kongresu Nauki
… głęboka przepaść pomiędzy światem humanistów a światem przyrodników i techników
… nauka gwałtownie traci zaufanie społeczne
… Polaków, nie mając elementarnej wiedzy o regułach organizacji państwa, a także o podstawowych procesach społecznych, bez trudności daje się manipulować politykom. Z drugiej strony, nie umiejąc odróżnić nauki od magii
… METODA NAUKOWA
… znaczenie problemu „dwóch kultur”
/Andrzej Białas, PAUza Akademicka Nr 397 /17-10-13
Big Melt, Not a Big Bang
… The cosmological constant and the creation of the universe
… magnitude of initial perturbations
… totally lack predictive power
… theorists still not merged gravity and quantum theory
… cosmogenesis—the creation of the universe
… the information content of cosmic spacetime
… hypothetical pre-geometric phase of the universe, in which notions of space and time have not yet-emerged from some as-yet unknown structure
… information should play a key role in the description of physics
… Spacetime should be thought of as made of microscopic degrees of freedom, just as matter is made of atoms.
… CosmIn, being a physical observable number, must be finite.
… CosmIn is indeed 4π
… The conventional approach must consider this result as a random numerical coincidence. We, on the other hand, believe it is telling us something deep and beautiful about our universe.
… to link the numerical value of the cosmological constant to the size of the fluctuations in the early universe
… The notion of a Big Bang is completely eliminated, and replaced by a transition from one phase to another at the boundary. And the need for an inflationary period in the universe’s early history is also eliminated.
… spacetime is made of more elementary degrees of freedom—just as matter is made of atoms /17-10-09
Aliens in our midst
… The ctenophore was already known for having a relatively advanced nervous system; .. its nerves were constructed from a different set of molecular building blocks – different from any other animal – using ‘a different chemical language’ .. these animals are ‘aliens of the sea’.
… This animal, the ctenophore, provides clues to how evolution might have gone if not for the advent of vertebrates, mammals and humans,
… how different from one another brains can be
… The tendency of complex nervous systems to evolve is probably universal
… All animals were sons and daughters of a single moment of evolutionary creation: the birth of the nerve cell.
… the first brain must have appeared quite early, before the ancestors of insects and vertebrates parted evolutionary ways. If this was true, then the 550 to 650 million years
… The ctenophore seemed to follow an entirely different evolutionary pathway
… the ctenophore lacked several classes of general body-patterning genes that were thought to be universal to all animals
… proteins and molecules was blindly chosen, through random gene duplication and mutation, to take part in building a nervous system
… scientists speculate what kind of life might exist on other worlds
… life might have arisen two or more times on our planet
… Ctenophores are a long-lost cousin that we didn’t even know we had. /17-10-05
Those 3% of scientific papers that deny climate change?
… A review found them all flawed
… Theoretical and Applied Climatology
… The researchers tried to replicate the results of those 3% of papers—a common way to test scientific studies—and found biased, faulty results.
… very single one of those analyses had an error—in their assumptions, methodology, or analysis—that, when corrected, brought their results into line with the scientific consensus
… Many had cherry-picked the results that conveniently supported their conclusion, while ignoring other context or records.
… inappropriate “curve-fitting”
… even contradicting each other /17-10-05
Absurdity of the Nobel Prizes in Science
… They distort the nature of the scientific enterprise, rewrite its history, and overlook many of its most important contributors.
… three-page-long author list
… misleading impression of how a lot of science is actually done
… usually reserved for Oscar or Emmy nominees /17-10-05
… make it tougher to call findings statistically significant
… The statistic is used to test a ‘null hypothesis’, a default state positing that there is no relationship between the phenomena being measured. The smaller the P value, the less likely it is that the results are due to chance — presuming that the null hypothesis is true. Results have typically been deemed ‘statistically significant’ — and the null hypothesis dismissed — when P values are below 0.05.
… this threshold should be reduced to 0.005
… researchers should select and justify P value thresholds for their experiments, before collecting any data
… there isn’t a single magic number /17-09-27
deep neural networks
… Experts wonder what it is about deep learning that enables generalization — and to what extent brains apprehend reality in the same way.
… a new theory explaining how deep learning works
… information bottleneck
… the most important part of learning is actually forgetting
… information theory wasn’t the right way to think about relevance, starting with misconceptions that go all the way to Shannon himself
… define ‘relevant’ in a precise sense
… compressing X as much as you can without losing the ability to predict Y
… deep learning proceeds in two phases: a short “fitting” phase, during which the network learns to label its training data, and a much longer “compression” phase, during which it becomes good at generalization, as measured by its performance at labeling new test data.
… The mystery of how brains sift signals from our senses and elevate them to the level of our conscious awareness
… fears that AI could someday pose an existential threat
… general insights about learning and intelligence /17-09-27
… a big abstract noun – truth – is at the heart of a cultural crisis
… Alfred Tarski’s famous example from the 1930s, “Snow is white” is true if and only if snow is white.
… True beliefs took humans to the moon, false ones led to a space shuttle exploding shortly after take-off.
… trust in religious texts and leaders, learned experts and the enduring folk wisdom called common sense
… Now, it seems, virtually nothing is universally taken as an authority.
… Picasso’s famous aphorism “Art is a lie that makes us realize truth”.
… believers have retorted that religion is concerned with a different kind of truth from that of science and so cannot be falsified by it .. Stephen J. Gould .. “Non-Overlapping Magisteria”
… Christ’s tomb was found empty .. It’s a rare Christian who says this doesn’t matter at all.
… Truth is not relative, but we relate to it in innumerable ways. /17-09-24
Tectonic Coincidence of Mexico’s
… whether the two temblors—on September 8th and 19th—were connected
… both exceptions to some general geophysical rules
… classic subduction-zone events. In fact, neither was
… megathrust events
… to distinguish causality from coincidence /17-09-24
Philosophy as the Las Vegas
… Philosophy is always going to be the default home of non-naturalists and anti-naturalists. Since no other discipline will take them seriously
… What happens in Vegas stays in Vegas!
… it’s philosophy, and who takes that seriously?
… whether the universe was created exactly six minutes ago
… sort of quarantine barrier between philosophers' doscourses and the general run
… Philosophy at its best is informed play of the highest orderand a propre ingredient in any naturalistic vision of inquiry. /Daniel C. Dennett/17-09-23
From galaxies far far away!
… cosmic rays with individual energies of several Joules
… rate of arrival of cosmic rays is ~6% greater from one half of the sky than from the opposite one,
… outside the Milky Way
… only about 1 per sq km per year
… 5.2 standard deviations (a chance of about two in ten million) /17-09-23
… Fancy feathers or (in humans) symmetrical faces have been cast not as instruments of sexual selection, but as “honest signals” of some greater underlying fitness.
… Genes, rather than traits, became what natural selection selected.
… Richard Prum .. THE EVOLUTION OF BEAUTY
… this “aesthetic” courtship, says Prum, creates an environment, temperaments and rituals — a sort of culture — that give the female sexual choice, autonomy and safety.
… selecting for males who allow females autonomy and choice.
… catalog of Things Natural Selection Can’t Explain but Sexual Selection Easily Can includes homosexuality, a tendency toward monogamy, both sex’s taste and capacity for sex outside of female fertility periods
… When sex offers orgasm at relatively low pregnancy risk, it provides a way not just to reproduce but to assess potential mates’ attention to female desires, tastes and choices.
… This is why beauty should not be seen as merely the stamp of quality assurance that conventional evolutionary theory thinks it is. Beauty, rather, forms the foundation of an entire, complex evolutionary dynamic — one that can influence how we treat each other. /17-09-23
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