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Javier E

Who Decides What's Racist? - Persuasion - 1 views

  • The implication of Hannah-Jones’s tweet and candidate Biden’s quip seems to be that you can have African ancestry, dark skin, textured hair, and perhaps even some “culturally black” traits regarding tastes in food, music, and ways of moving through the world. But unless you hold the “correct” political beliefs and values, you are not authentically black.
  • In a now-deleted tweet from May 22, 2020, Nikole Hannah-Jones, a Pulitzer Prize-winning reporter for The New York Times, opined, “There is a difference between being politically black and being racially black.”
  • Shelly Eversley’s The Real Negro suggests that in the latter half of the 20th century, the criteria of what constitutes “authentic” black experience moved from perceptible outward signs, like the fact of being restricted to segregated public spaces and speaking in a “black” dialect, to psychological, interior signs. In this new understanding, Eversley writes, “the ‘truth’ about race is felt, not performed, not seen.”
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  • This insight goes a long way to explaining the current fetishization of experience, especially if it is (redundantly) “lived.” Black people from all walks of life find themselves deferred to by non-blacks
  • black people certainly don’t all “feel” or “experience” the same things. Nor do they all "experience" the same event in an identical way. Finally, even when their experiences are similar, they don’t all think about or interpret their experiences in the same way.
  • we must begin to attend in a serious way to heterodox black voices
  • This need is especially urgent given the ideological homogeneity of the “antiracist” outlook and efforts of elite institutions, including media, corporations, and an overwhelmingly progressive academia. For the arbiters of what it means to be black that dominate these institutions, there is a fairly narrowly prescribed “authentic” black narrative, black perspective, and black position on every issue that matters.
  • When we hear the demand to “listen to black voices,” what is usually meant is “listen to the right black voices.”
  • Many non-black people have heard a certain construction of “the black voice” so often that they are perplexed by black people who don’t fit the familiar model.
  • Similarly, many activists are not in fact “pro-black”: they are pro a rather specific conception of “blackness” that is not necessarily endorsed by all black people.
  • This is where our new website, Free Black Thought (FBT), seeks to intervene in the national conversation. FBT honors black individuals for their distinctive, diverse, and heterodox perspectives, and offers up for all to hear a polyphony, perhaps even a cacophony, of different and differing black voices.
  • The practical effects of the new antiracism are everywhere to be seen, but in few places more clearly than in our children’s schools
  • one might reasonably question what could be wrong with teaching children “antiracist” precepts. But the details here are full of devils.
  • To take an example that could affect millions of students, the state of California has adopted a statewide Ethnic Studies Model Curriculum (ESMC) that reflects “antiracist” ideas. The ESMC’s content inadvertently confirms that contemporary antiracism is often not so much an extension of the civil rights movement but in certain respects a tacit abandonment of its ideals.
  • It has thus been condemned as a “perversion of history” by Dr. Clarence Jones, MLK’s legal counsel, advisor, speechwriter, and Scholar in Residence at the Martin Luther King, Jr. Institute at Stanford University:
  • Essentialist thinking about race has also gained ground in some schools. For example, in one elite school, students “are pressured to conform their opinions to those broadly associated with their race and gender and to minimize or dismiss individual experiences that don’t match those assumptions.” These students report feeling that “they must never challenge any of the premises of [the school’s] ‘antiracist’ teachings.”
  • In contrast, the non-white students were taught that they were “folx (sic) who do not benefit from their social identities,” and “have little to no privilege and power.”
  • The children with “white” in their identity map were taught that they were part of the “dominant culture” which has been “created and maintained…to hold power and stay in power.” They were also taught that they had “privilege” and that “those with privilege have power over others.
  • Or consider the third-grade students at R.I. Meyerholz Elementary School in Cupertino, California
  • Or take New York City’s public school system, one of the largest educators of non-white children in America. In an effort to root out “implicit bias,” former Schools Chancellor Richard Carranza had his administrators trained in the dangers of “white supremacy culture.”
  • A slide from a training presentation listed “perfectionism,” “individualism,” “objectivity” and “worship of the written word” as white supremacist cultural traits to be “dismantled,”
  • Finally, some schools are adopting antiracist ideas of the sort espoused by Ibram X. Kendi, according to whom, if metrics such as tests and grades reveal disparities in achievement, the project of measuring achievement must itself be racist.
  • Parents are justifiably worried about such innovations. What black parent wants her child to hear that grading or math are “racist” as a substitute for objective assessment and real learning? What black parent wants her child told she shouldn’t worry about working hard, thinking objectively, or taking a deep interest in reading and writing because these things are not authentically black?
  • Clearly, our children’s prospects for success depend on the public being able to have an honest and free-ranging discussion about this new antiracism and its utilization in schools. Even if some black people have adopted its tenets, many more, perhaps most, hold complex perspectives that draw from a constellation of rather different ideologies.
  • So let’s listen to what some heterodox black people have to say about the new antiracism in our schools.
  • Coleman Hughes, a fellow at the Manhattan Institute, points to a self-defeating feature of Kendi-inspired grading and testing reforms: If we reject high academic standards for black children, they are unlikely to rise to “those same rejected standards” and racial disparity is unlikely to decrease
  • Chloé Valdary, the founder of Theory of Enchantment, worries that antiracism may “reinforce a shallow dogma of racial essentialism by describing black and white people in generalizing ways” and discourage “fellowship among peers of different races.”
  • We hope it’s obvious that the point we’re trying to make is not that everyone should accept uncritically everything these heterodox black thinkers say. Our point in composing this essay is that we all desperately need to hear what these thinkers say so we can have a genuine conversation
  • We promote no particular politics or agenda beyond a desire to offer a wide range of alternatives to the predictable fare emanating from elite mainstream outlets. At FBT, Marxists rub shoulders with laissez-faire libertarians. We have no desire to adjudicate who is “authentically black” or whom to prefer.
knudsenlu

Will the Quantum Nature of Gravity Finally Be Measured? - The Atlantic - 0 views

  • In 1935, when both quantum mechanics and Albert Einstein’s general theory of relativity were young, a little-known Soviet physicist named Matvei Bronstein, just 28 himself, made the first detailed study of the problem of reconciling the two in a quantum theory of gravity. This “possible theory of the world as a whole,” as Bronstein called it, would supplant Einstein’s classical description of gravity, which casts it as curves in the space-time continuum, and rewrite it in the same quantum language as the rest of physics.
  • His words were prophetic. Eighty-three years later, physicists are still trying to understand how space-time curvature emerges on macroscopic scales from a more fundamental, presumably quantum picture of gravity; it’s arguably the deepest question in physics.
  • The search for the full theory of quantum gravity has been stymied by the fact that gravity’s quantum properties never seem to manifest in actual experience. Physicists never get to see how Einstein’s description of the smooth space-time continuum, or Bronstein’s quantum approximation of it when it’s weakly curved, goes wrong.
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  • Not only that, but the universe appears to be governed by a kind of cosmic censorship: Regions of extreme gravity—where space-time curves so sharply that Einstein’s equations malfunction and the true, quantum nature of gravity and space-time must be revealed—always hide behind the horizons of black holes.
  • Dyson, who helped develop quantum electrodynamics (the theory of interactions between matter and light) and is professor emeritus at the Institute for Advanced Study in Princeton, New Jersey, where he overlapped with Einstein, disagrees with the argument that quantum gravity is needed to describe the unreachable interiors of black holes. And he wonders whether detecting the hypothetical graviton might be impossible, even in principle. In that case, he argues, quantum gravity is metaphysical, rather than physics.
  • The ability to detect the “grin” of quantum gravity would seem to refute Dyson’s argument. It would also kill the gravitational decoherence theory, by showing that gravity and space-time do maintain quantum superpositions.
  • If gravity is a quantum interaction, then the answer is: It depends. Each component of the blue diamond’s superposition will experience a stronger or weaker gravitational attraction to the red diamond, depending on whether the latter is in the branch of its superposition that’s closer or farther away. And the gravity felt by each component of the red diamond’s superposition similarly depends on where the blue diamond is.
manhefnawi

Einstein's Theory of Relativity, Explained in a Pioneering 1923 Silent Film - Brain Pic... - 0 views

  • “This is a participatory universe,” physicist John Archibald Wheeler, who popularized the term black hole, wrote in his influential theory known as It from Bit, asserting that “physics gives rise to observer-participancy; observer-participancy gives rise to information; and information gives rise to physics” — an assertion he could not have made without Einstein’s theory of relativity and its groundbreaking insight into how the laws of physics appear to different observers with different frames of reference.
Javier E

Why Study History? (1985) | AHA - 0 views

  • Isn't there quite enough to learn about the world today? Why add to the burden by looking at the past
  • Historical knowledge is no more and no less than carefully and critically constructed collective memory. As such it can both make us wiser in our public choices and more richly human in our private lives.
  • Without individual memory, a person literally loses his or her identity, and would not know how to act in encounters with others. Imagine waking up one morning unable to tell total strangers from family and friends!
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  • Collective memory is similar, though its loss does not immediately paralyze everyday private activity. But ignorance of history-that is, absent or defective collective memory-does deprive us of the best available guide for public action, especially in encounters with outsider
  • Often it is enough for experts to know about outsiders, if their advice is listened to. But democratic citizenship and effective participation in the determination of public policy require citizens to share a collective memory, organized into historical knowledge and belief
  • This value of historical knowledge obviously justifies teaching and learning about what happened in recent times, for the way things are descends from the way they were yesterday and the day before that
  • in fact, institutions that govern a great deal of our everyday behavior took shape hundreds or even thousands of years ago
  • Only an acquaintance with the entire human adventure on earth allows us to understand these dimensions of contemporary reality.
  • it follows that study of history is essential for every young person.
  • Collective memory is quite the same. Historians are always at work reinterpreting the past, asking new questions, searching new sources and finding new meanings in old documents in order to bring the perspective of new knowledge and experience to bear on the task of understanding the past.
  • what we know and believe about history is always changing. In other words, our collective, codified memory alters with time just as personal memories do, and for the same reasons.
  • skeptics are likely to conclude that history has no right to take student time from other subjects. If what is taught today is not really true, how can it claim space in a crowded school curriculum?
  • what if the world is more complicated and diverse than words can ever tell? What if human minds are incapable of finding' neat pigeon holes into which everything that happens will fit?
  • What if we have to learn to live with uncertainty and probabilities, and act on the basis of the best guesswork we are capable of?
  • Then, surely, the changing perspectives of historical understanding are the very best introduction we can have to the practical problems of real life. Then, surely, a serious effort to understand the interplay of change and continuity in human affairs is the only adequate introduction human beings can have to the confusing flow of events that constitutes the actual, adult world.
  • Memory is not something fixed and forever. As time passes, remembered personal experiences take on new meanings.
  • Systematic sciences are not enough. They discount time, and therefore oversimplify reality, especially human reality.
  • Memory, indeed, makes us human. History, our collective memory, carefully codified and critically revised, makes us social, sharing ideas and ideals with others so as to form all sorts of different human groups
  • The varieties of history are enormous; facts and probabilities about the past are far too numerous for anyone to comprehend them all. Every sort of human group has its own histor
  • Where to start? How bring some sort of order to the enormous variety of things known and believed about the past?
  • Early in this century, teachers and academic administrators pretty well agreed that two sorts of history courses were needed: a survey of the national history of the United States and a survey of European history.
  • This second course was often broadened into a survey of Western civilization in the 1930s and 1940s
  • But by the 1960s and 1970s these courses were becoming outdated, left behind by the rise of new kinds social and quantitative history, especially the history of women, of Blacks, and of other formerly overlooked groups within the borders of the United States, and of peoples emerging from colonial status in the world beyond our borders.
  • much harder to combine old with new to make an inclusive, judiciously balanced (and far less novel) introductory course for high school or college students.
  • But abandoning the effort to present a meaningful portrait of the entire national and civilizational past destroyed the original justification for requiring students to study history
  • Competing subjects abounded, and no one could or would decide what mattered most and should take precedence. As this happened, studying history became only one among many possible ways of spending time in school.
  • The costs of this change are now becoming apparent, and many concerned persons agree that returning to a more structured curriculum, in which history ought to play a prominent part, is imperative.
  • three levels of generality seem likely to have the greatest importance for ordinary people.
  • First is family, local, neighborhood history
  • Second is national history, because that is where political power is concentrated in our time.
  • Last is global history, because intensified communications make encounters with all the other peoples of the earth increasingly important.
  • Other pasts are certainly worth attention, but are better studied in the context of a prior acquaintance with personal-local, national, and global history. That is because these three levels are the ones that affect most powerfully what all other groups and segments of society actually do.
  • National history that leaves out Blacks and women and other minorities is no longer acceptable; but American history that leaves out the Founding Fathers and the Constitution is not acceptable either. What is needed is a vision of the whole, warts and all.
  • the study of history does not lead to exact prediction of future events. Though it fosters practical wisdom, knowledge of the past does not permit anyone to know exactly what is going to happen
  • Consequently, the lessons of history, though supremely valuable when wisely formulated, become grossly misleading when oversimplifiers try to transfer them mechanically from one age to another, or from one place to another.
  • Predictable fixity is simply not the human way of behaving. Probabilities and possibilities-together with a few complete surprises-are what we live with and must learn to expect.
  • Second, as acquaintance with the past expands, delight in knowing more and more can and often does become an end in itself.
  • On the other hand, studying alien religious beliefs, strange customs, diverse family patterns and vanished social structures shows how differently various human groups have tried to cop
  • Broadening our humanity and extending our sensibilities by recognizing sameness and difference throughout the recorded past is therefore an important reason for studying history, and especially the history of peoples far away and long ago
  • For we can only know ourselves by knowing how we resemble and how we differ from others. Acquaintance with the human past is the only way to such self knowledge.
Javier E

A Billionaire Mathematician's Life of Ferocious Curiosity - The New York Times - 0 views

  • James H. Simons likes to play against type. He is a billionaire star of mathematics and private investment who often wins praise for his financial gifts to scientific research and programs to get children hooked on math.But in his Manhattan office, high atop a Fifth Avenue building in the Flatiron district, he’s quick to tell of his career failings.He was forgetful. He was demoted. He found out the hard way that he was terrible at programming computers. “I’d keep forgetting the notation,” Dr. Simons said. “I couldn’t write programs to save my life.”After that, he was fired.His message is clearly aimed at young people: If I can do it, so can you.
  • Down one floor from his office complex is Math for America, a foundation he set up to promote math teaching in public schools. Nearby, on Madison Square Park, is the National Museum of Mathematics, or MoMath, an educational center he helped finance. It opened in 2012 and has had a quarter million visitors.
  • Dr. Simons received his doctorate at 23; advanced code breaking for the National Security Agency at 26; led a university math department at 30; won geometry’s top prize at 37; founded Renaissance Technologies, one of the world’s most successful hedge funds, at 44; and began setting up charitable foundations at 56.
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  • With a fortune estimated at $12.5 billion, Dr. Simons now runs a tidy universe of science endeavors, financing not only math teachers but hundreds of the world’s best investigators, even as Washington has reduced its support for scientific research. His favorite topics include gene puzzles, the origins of life, the roots of autism, math and computer frontiers, basic physics and the structure of the early cosmos.
  • In time, his novel approach helped change how the investment world looks at financial markets. The man who “couldn’t write programs” hired a lot of programmers, as well as physicists, cryptographers, computational linguists, and, oh yes, mathematicians. Wall Street experience was frowned on. A flair for science was prized. The techies gathered financial data and used complex formulas to make predictions and trade in global markets.
  • “He’s an individual of enormous talent and accomplishment, yet he’s completely unpretentious,” said Marc Tessier-Lavigne, a neuroscientist who is the president of Rockefeller University. “He manages to blend all these admirable qualities.”
  • On a wall in Dr. Simons’s office is one of his prides: a framed picture of equations known as Chern-Simons, after a paper he wrote with Shiing-Shen Chern, a prominent geometer. Four decades later, the equations define many esoteric aspects of modern physics, including advanced theories of how invisible fields like those of gravity interact with matter to produce everything from superstrings to black holes.
  • Working closely with his wife, Marilyn, the president of the Simons Foundation and an economist credited with philanthropic savvy, Dr. Simons has pumped more than $1 billion into esoteric projects as well as retail offerings like the World Science Festival and a scientific lecture series at his Fifth Avenue building. Characteristically, it is open to the public.
  • Forbes magazine ranks him as the world’s 93rd richest person — ahead of Eric Schmidt of Google and Elon Musk of Tesla Motors, among others — and in 2010, he and his wife were among the first billionaires to sign the Giving Pledge, promising to devote “the great majority” of their wealth to philanthropy.
  • For all his self-deprecations, Dr. Simons does credit himself with a contemplative quality that seems to lie behind many of his accomplishments.“I wasn’t the fastest guy in the world,” Dr. Simons said of his youthful math enthusiasms. “I wouldn’t have done well in an Olympiad or a math contest. But I like to ponder. And pondering things, just sort of thinking about it and thinking about it, turns out to be a pretty good approach.”
katrinaskibicki

Revolutionary discovery: Scientists find gravitational waves Einstein predicted - 0 views

  • For the first time ever, scientists have directly detected gravitational waves, bizarre ripples in space-time foreseen by Einstein a century ago. The discovery was the final, acid test of Einstein’s general theory of relativity.
  • Einstein has been proven right – again.For the first time ever, scientists have directly detected gravitational waves, bizarre ripples in space-time foreseen by Einstein a century ago. The discovery was the final, acid test of Einstein’s celebrated general theory of relativity, and once again Einstein’s genius held up to scrutiny.
  • The waves in question arose during the close approach of two black holes some 1.3 billion years ago, when multicellular life began to spread on Earth. Traveling at the speed of light, the waves reached our planet in September -- precisely when a observatory built to detect them was emerging from a long hiatus.
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  • When scientists first saw the data suggesting that they’d captured a gravitational wave, they thought the results seemed to good to be true. Past claims of gravitational waves have proven unreliable, and there are many possible sources of error.
  • Gravitational waves confirmedAstrophysicists have announced the discovery of gravitational waves, ripples that travel at the speed of light through the fabric of space-time. A 1916 theory of Albert Einstein’s predicted their existence. .oembed-asset-photo-image { width: 100%; }
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    A new scientific discovery shows that Einstein's predictions were correct, yet again!
Javier E

Physicists in Europe Find Tantalizing Hints of a Mysterious New Particle - The New York... - 0 views

  • Two teams of physicists working independently at the Large Hadron Collider at CERN, the European Organization for Nuclear Research, reported on Tuesday that they had seen traces of what could be a new fundamental particle of nature.
  • One possibility, out of a gaggle of wild and not-so-wild ideas springing to life as the day went on, is that the particle — assuming it is real — is a heavier version of the Higgs boson, a particle that explains why other particles have mass. Another is that it is a graviton, the supposed quantum carrier of gravity, whose discovery could imply the existence of extra dimensions of space-time.
  • At the end of a long chain of “ifs” could be a revolution, the first clues to a theory of nature that goes beyond the so-called Standard Model, which has ruled physics for the last quarter-century.
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  • The Higgs boson was the last missing piece of the Standard Model, which explains all we know about subatomic particles and forces. But there are questions this model does not answer, such as what happens at the bottom of a black hole, the identity of the dark matter and dark energy that rule the cosmos, or why the universe is matter and not antimatter.
  • When physicists announced in 2012 that they had indeed discovered the Higgs boson, it was not the end of physics. It was not even, to paraphrase Winston Churchill, the beginning of the end.
  • A coincidence is the most probable explanation for the surprising bumps in data from the collider, physicists from the experiments cautioned, saying that a lot more data was needed and would in fact soon be available
  • The Large Hadron Collider was built at a cost of some $10 billion, to speed protons around an 18-mile underground track at more than 99 percent of the speed of light and smash them together in search of new particles and forces of nature. By virtue of Einstein’s equivalence of mass and energy, the more energy poured into these collisions, the more massive particles can come out of them. And by the logic of quantum microscopy, the more energy they have to spend, the smaller and more intimate details of nature physicists can see.
  • Since June, after a two-year shutdown, CERN physicists have been running their collider at nearly twice the energy with which they discovered the Higgs, firing twin beams of protons with 6.5 trillion electron volts of energy at each other in search of new particles to help point them to deeper laws.
  • The most intriguing result so far, reported on Tuesday, is an excess of pairs of gamma rays corresponding to an energy of about 750 billion electron volts. The gamma rays, the physicists said, could be produced by the radioactive decay of a new particle, in this case perhaps a cousin of the Higgs boson, which itself was first noticed because it decayed into an abundance of gamma rays.
  • Or it could be a more massive particle that has decayed in steps down to a pair of photons. Nobody knows. No model predicted this, which is how some scientists like it.
  • “We are barely coming to terms with the power and the glory” of the CERN collider’s ability to operate at 13 trillion electron volts, Dr. Spiropulu said in a text message. “We are now entering the era of taking a shot in the dark!”
kushnerha

Physicists in Europe Find Tantalizing Hints of a Mysterious New Particle - The New York... - 1 views

  • seen traces of what could be a new fundamental particle of nature.
  • One possibility, out of a gaggle of wild and not-so-wild ideas springing to life as the day went on, is that the particle — assuming it is real — is a heavier version of the Higgs boson, a particle that explains why other particles have mass. Another is that it is a graviton, the supposed quantum carrier of gravity, whose discovery could imply the existence of extra dimensions of space-time.
  • At the end of a long chain of “ifs” could be a revolution, the first clues to a theory of nature that goes beyond the so-called Standard Model, which has ruled physics for the last quarter-century.
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  • noting that the history of particle physics is rife with statistical flukes and anomalies that disappeared when more data was compiled
  • A coincidence is the most probable explanation for the surprising bumps in data from the collider, physicists from the experiments cautioned
  • Physicists could not help wondering if history was about to repeat itself. It was four years ago this week that the same two teams’ detection of matching bumps in Large Hadron Collider data set the clock ticking for the discovery of the Higgs boson six months later.
  • If the particle is real, Dr. Lykken said, physicists should know by this summer, when they will have 10 times as much data to present to scientists from around the world who will convene in Chicago
  • The Higgs boson was the last missing piece of the Standard Model, which explains all we know about subatomic particles and forces. But there are questions this model does not answer, such as what happens at the bottom of a black hole, the identity of the dark matter and dark energy that rule the cosmos, or why the universe is matter and not antimatter.
  • CERN physicists have been running their collider at nearly twice the energy with which they discovered the Higgs, firing twin beams of protons with 6.5 trillion electron volts of energy at each other in search of new particles to help point them to deeper laws.The main news since then has been mainly that there is no news yet, only tantalizing hints, bumps in the data, that might be new particles and signposts of new theories, or statistical demons.
  • Or it could be a more massive particle that has decayed in steps down to a pair of photons. Nobody knows. No model predicted this, which is how some scientists like it.
  • “The more nonstandard the better,” said Joe Lykken, the director of research at the Fermi National Accelerator Laboratory and a member of one of the CERN teams. “It will give people a lot to think about. We get paid to speculate.”
  • When physicists announced in 2012 that they had indeed discovered the Higgs boson, it was not the end of physics. It was not even, to paraphrase Winston Churchill, the beginning of the end.It might, they hoped, be the end of the beginning.
  • Such a discovery would augur a fruitful future for cosmological wanderings and for the CERN collider, which will be running for the next 20 years.
Javier E

How YouTube Drives People to the Internet's Darkest Corners - WSJ - 0 views

  • YouTube is the new television, with more than 1.5 billion users, and videos the site recommends have the power to influence viewpoints around the world.
  • Those recommendations often present divisive, misleading or false content despite changes the site has recently made to highlight more-neutral fare, a Wall Street Journal investigation found.
  • Behind that growth is an algorithm that creates personalized playlists. YouTube says these recommendations drive more than 70% of its viewing time, making the algorithm among the single biggest deciders of what people watch.
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  • People cumulatively watch more than a billion YouTube hours daily world-wide, a 10-fold increase from 2012
  • After the Journal this week provided examples of how the site still promotes deceptive and divisive videos, YouTube executives said the recommendations were a problem.
  • When users show a political bias in what they choose to view, YouTube typically recommends videos that echo those biases, often with more-extreme viewpoints.
  • Such recommendations play into concerns about how social-media sites can amplify extremist voices, sow misinformation and isolate users in “filter bubbles”
  • Unlike Facebook Inc. and Twitter Inc. sites, where users see content from accounts they choose to follow, YouTube takes an active role in pushing information to users they likely wouldn’t have otherwise seen.
  • “The editorial policy of these new platforms is to essentially not have one,”
  • “That sounded great when it was all about free speech and ‘in the marketplace of ideas, only the best ones win.’ But we’re seeing again and again that that’s not what happens. What’s happening instead is the systems are being gamed and people are being gamed.”
  • YouTube has been tweaking its algorithm since last autumn to surface what its executives call “more authoritative” news source
  • YouTube last week said it is considering a design change to promote relevant information from credible news sources alongside videos that push conspiracy theories.
  • The Journal investigation found YouTube’s recommendations often lead users to channels that feature conspiracy theories, partisan viewpoints and misleading videos, even when those users haven’t shown interest in such content.
  • YouTube engineered its algorithm several years ago to make the site “sticky”—to recommend videos that keep users staying to watch still more, said current and former YouTube engineers who helped build it. The site earns money selling ads that run before and during videos.
  • YouTube’s algorithm tweaks don’t appear to have changed how YouTube recommends videos on its home page. On the home page, the algorithm provides a personalized feed for each logged-in user largely based on what the user has watched.
  • There is another way to calculate recommendations, demonstrated by YouTube’s parent, Alphabet Inc.’s Google. It has designed its search-engine algorithms to recommend sources that are authoritative, not just popular.
  • Google spokeswoman Crystal Dahlen said that Google improved its algorithm last year “to surface more authoritative content, to help prevent the spread of blatantly misleading, low-quality, offensive or downright false information,” adding that it is “working with the YouTube team to help share learnings.”
  • In recent weeks, it has expanded that change to other news-related queries. Since then, the Journal’s tests show, news searches in YouTube return fewer videos from highly partisan channels.
  • YouTube’s recommendations became even more effective at keeping people on the site in 2016, when the company began employing an artificial-intelligence technique called a deep neural network that makes connections between videos that humans wouldn’t. The algorithm uses hundreds of signals, YouTube says, but the most important remains what a given user has watched.
  • Using a deep neural network makes the recommendations more of a black box to engineers than previous techniques,
  • “We don’t have to think as much,” he said. “We’ll just give it some raw data and let it figure it out.”
  • To better understand the algorithm, the Journal enlisted former YouTube engineer Guillaume Chaslot, who worked on its recommendation engine, to analyze thousands of YouTube’s recommendations on the most popular news-related queries
  • Mr. Chaslot created a computer program that simulates the “rabbit hole” users often descend into when surfing the site. In the Journal study, the program collected the top five results to a given search. Next, it gathered the top three recommendations that YouTube promoted once the program clicked on each of those results. Then it gathered the top three recommendations for each of those promoted videos, continuing four clicks from the original search.
  • The first analysis, of November’s top search terms, showed YouTube frequently led users to divisive and misleading videos. On the 21 news-related searches left after eliminating queries about entertainment, sports and gaming—such as “Trump,” “North Korea” and “bitcoin”—YouTube most frequently recommended these videos:
  • The algorithm doesn’t seek out extreme videos, they said, but looks for clips that data show are already drawing high traffic and keeping people on the site. Those videos often tend to be sensationalist and on the extreme fringe, the engineers said.
  • Repeated tests by the Journal as recently as this week showed the home page often fed far-right or far-left videos to users who watched relatively mainstream news sources, such as Fox News and MSNBC.
  • Searching some topics and then returning to the home page without doing a new search can produce recommendations that push users toward conspiracy theories even if they seek out just mainstream sources.
  • After searching for “9/11” last month, then clicking on a single CNN clip about the attacks, and then returning to the home page, the fifth and sixth recommended videos were about claims the U.S. government carried out the attacks. One, titled “Footage Shows Military Plane hitting WTC Tower on 9/11—13 Witnesses React”—had 5.3 million views.
caelengrubb

How to Read the News Without Going Insane | Vanity Fair - 0 views

  • In the years since smartphones were invented, there have been smart people with advice about leaving this little black box of horrors behind, about containing the content Pandora created. But maybe this time is my chance to change, and maybe it’s yours.
  • “Right now is an extremely, extremely challenging time to have a healthy relationship with the news, and that’s regardless of your political orientation, or even if you care about politics at al
  • Recognize it’s not your fault
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  • Begin to build boundaries by starting with the easy stuff, whatever that means for you
  • This one is relatively simple: don’t have television news on in the background (or better, a news podcast). Clean up the passive background noise
  • Assess the situation
  • Figure out your main problem area
  • Choose what, when, where, and how
  • “What level of news is going to make me feel suitably up-to-date and responsible without driving me insane? Recognize that may be a moving target and that it’s going to be extremely difficult to stick with, but at least have some kind of goal.
  • A word on the “when” part 
  • Sometimes this means buying an alarm clock and putting your phone in a different room/closet than the one where you sleep. 
  • Ask for help
  • Who profits from my fear, my elation, my outrage? It’s a nice question to keep in the back of one’s head when you’re down the rabbit hole—especially when you’re not really getting much out of it, but just half-remembered ideas about what you’re reading and why.
knudsenlu

String Theory: The Best Explanation for Everything in the Universe - The Atlantic - 0 views

  • Somehow, space-time curvature emerges as the collective effect of quantized units of gravitational energy—particles known as gravitons. But naïve attempts to calculate how gravitons interact result in nonsensical infinities, indicating the need for a deeper understanding of gravity.
  • String theory (or, more technically, M-theory) is often described as the leading candidate for the theory of everything in our universe. But there’s no empirical evidence for it, or for any alternative ideas about how gravity might unify with the rest of the fundamental forces. Why, then, is string/M-theory given the edge over the others?
  • For such imaginary worlds, physicists can describe processes at all energies, including, in principle, black-hole formation and evaporation. The 16,000 papers that have cited Maldacena’s over the past 20 years mostly aim at carrying out these calculations in order to gain a better understanding of AdS/CFT and quantum gravity.
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  • his basic sequence of events has led most experts to consider M-theory the leading TOE candidate, even as its exact definition in a universe like ours remains unknown.
  • ) One philosopher has even argued that string theory’s status as the only known consistent theory counts as evidence that the theory is correct.
knudsenlu

A Tantalizing Signal From the Early Universe - The Atlantic - 0 views

  • Near the beginning, not long after the Big Bang, the universe was a cold and dark place swirling with invisible gas, mostly hydrogen and helium. Over millions of years, gravity pulled some of this primordial gas into pockets. The pockets eventually became so dense they collapsed under their own weight and ignited, flooding the darkness with ultraviolet radiation. These were the very first stars in the universe, flashing into existence like popcorn kernels unfurling in the hot oil of an empty pan.
  • Everything flowed from this cosmic dawn. The first stars illuminated the universe, collapsed into the black holes that keep galaxies together, and produced the heavy elements that would make planets and moons and the human beings that evolved to gaze upon it all.
  • Astronomers said Wednesday they have found, for the first time, evidence of the earliest stars.
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  • This epoch in our cosmic history has long fascinated scientists. They hoped that someday, using technology that was calibrated just right, they could detect faint signals from that moment. Now, they think they’ve done it.
  • The nature of this signal suggests a new estimate for when the first stars emerged: about 180 million years after the Big Bang, slightly earlier than many scientists expected, but still within the expectations of theoretical models.
  • The nature of the radio waves Bowman and his colleagues detected mostly matches theoretical predictions, but not everything lines up. When they tuned their instrument to listen to the frequency for hydrogen gas that models predicted, they didn’t hear anything. When they decided to search in a lower range, they got it. But the signal they found was stronger than expected. That meant that the hydrogen gas in the early universe was much much colder—perhaps nearly twice as cold—than previously estimated.
  • Bowman says other teams around the world have been working to build and design instruments to detect this signal from the early universe, and he expects they should be able to confirm the results in the coming months.
manhefnawi

Singularity: Poet Marie Howe's Beautiful Tribute to Stephen Hawking and Our Belonging t... - 0 views

  • Do you sometimes want to wake up to the singularity we once were?
  • what happens to a dying star as it collapses to form a singularity — that tiny point of zero radius, infinite density, and infinite curvature of spacetime at the heart of a black hole.
  • shaped the course of modern physics and changed our common understanding of why everything that is is
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