Plant Intelligence

Nicole Martinelli in Wired:

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Professor Stefano Mancuso knows it isn’t easy being green: He runs the world’s only laboratory dedicated to plant intelligence.

At the International Laboratory of Plant Neurobiology (LINV), about seven miles outside Florence, Italy, Mancuso and his team of nine work to debunk the myth that plants are low-life. Research at the modern building combines physiology, ecology and molecular biology.

“If you define intelligence as the capacity to solve problems, plants have a lot to teach us,” says Mancuso, dressed in harmonizing shades of his favorite color: green. “Not only are they ‘smart’ in how they grow, adapt and thrive, they do it without neuroses. Intelligence isn’t only about having a brain.”

Plants have never been given their due in the order of things; they’ve usually been dismissed as mere vegetables. But there’s a growing body of research showing that plants have a lot to contribute in fields as disparate as robotics and telecommunications. For instance, current projects at the LINV include a plant-inspired robot in development for the European Space Agency. The “plantoid” might be used to explore the Martian soil by dropping mechanical “pods” capable of communicating with a central “stem,” which would send data back to Earth.

From the Annals of Altruism, Wikipedia Again

A closer look at the Good Samaritans at Wikipedia (via EurekAlert):

Dartmouth researchers looked at the online encyclopedia Wikipedia to determine if the anonymous, infrequent contributors, the Good Samaritans, are as reliable as the people who update constantly and have a reputation to maintain.

The answer is, surprisingly, yes. The researchers discovered that Good Samaritans contribute high-quality content, as do the active, registered users. They examined Wikipedia authors and the quality of Wikipedia content as measured by how long and how much of it persisted before being changed or corrected.

“This finding was both novel and unexpected,” says Denise Anthony, associate professor of sociology. “In traditional laboratory studies of collective goods, we don’t include Good Samaritans, those people who just happen to pass by and contribute, because those carefully designed studies don’t allow for outside actors. It took a real-life situation for us to recognize and appreciate the contributions of Good Samaritans to web content.”

Debating Race and the American Electoral Scene

Paul Krugman and Brad DeLong discuss the southern strategy, the undoing of the New Deal coalition, and the future of America’s electoral terrain over at TPM Cafe. Krugman:

To give you a sense of just how little there is to be explained once you take this shift into account, here’s a statistic from Larry Bartels, my Princeton colleague. Everyone knows that white men have left the Democratic Party. But what everyone knows isn’t true, if you exclude the South. In 1952, 40 percent of non-Southern white males voted Democratic; in 2004, that was down to, um, 39 percent. (And no, the choice of years doesn’t matter – a fitted trend line tells the same story.)

Now, you could argue that the distinctiveness of the Southern vote isn’t about race. But during the rise of movement conservatism, conservative politicians clearly campaigned on race – that is, they behaved as if they thought that was what it was all about. Ronald Reagan – the real RR, not the latter-day saint – was best known in the 70s for his tales of welfare queens driving Cadillacs. He began his 1980 campaign with the infamous states’ rights speech at Philadelphia, Mississippi, where civil rights workers were murdered.

DeLong:

Back in the 1920s, you see, there were a lot of northern liberals who voted Republican because Lincoln had freed the slaves (they were called “Progressives”) and a lot of southern conservatives who voted Democratic because Lincoln had freed the slaves (“Dixiecrats”). The Great Crash and the Great Depression broke the allegiance of northern Republican liberals, so from 1933 on northern liberals vote Democratic. Southern conservatives, however, by and large continue to vote Democratic until the 1980s or so.

This means that from 1933 to 1994 the partisan balance of seats in the congress (and, to a much lesser extent, the presidency) is substantially to the left of where America is. From 1933 to 1960 or so the fact that southern conservative Democrats are long-serving and hold the committee chairs moderates the effects of the partisan balance. But by the 1980s the committee chairships are mostly held by northern liberals–pushing the balance of power in congress substantially to the left of the country. And in the 1990s the balance shifted back as southern conservatives stopped voting Democratic.

Debating Statistics

Russell Roberts over at Cafe Hayek and Robin Hanson over at Overcoming Bias argue about the value of statistical techniques. Roberts:

The nature of the analysis is such that neither side can convince the other that “their” analysis is reliable. That’s not always true. As I suggest in the podcast, Milton Friedman was able to convince the skeptics that inflation is everywhere and always a monetary phenomenon. Friedman won the debate. But how many other studies can you think of where someone staked out a controversial position and convinced the skeptics based on empirical analysis? I think it can be done, but it’s rare. And in today’s world, most of the interesting empirical claims are being made in cases where the data are too incomplete and the issue is so complex that we can’t move to a consensus. The empirical work doesn’t improve our understanding of what’s going on. It masks what’s going on. It gives a patina of science when in effect the numbers aren’t really informing the debate.

Hanson:

If Russ relies little on data to draw his conclusions, then on what does he rely? Perhaps he relies on theoretical arguments. But can’t we say the same thing about theory, that we mainly just search for theory arguments to support preconceived conclusions? If so, what is left, if we rely on neither data nor theory?

Try saying this out loud: “Neither the data nor theory I’ve come across much explain why I believe this conclusion, relative to my random whim, inherited personality, and early culture and indoctrination, and I have no good reasons to think these are much correlated with truth.” That does not seem a conclusion worth retaining.

Roberts:

My basic point was that when it comes to high-powered sophisticated statistical techniques, our biases as researchers and as consumers of that research often triumph over truth. The truth is elusive in complex systems with many things changing at once. It’s hard to isolate the independent effect of one particular variable. When scholars can run hundreds of multivariate regressions at very low cost, it easy to convince yourself that the results that confirm your prior beliefs are the “right “ results. The ones that failed must be the “bad ones.”

[H/t: Saifedean Ammous]

An Open Letter from Akbar Ganji to Ban Ki-Moon

In the Boston Review:

The people of Iran and Iranian advocates for freedom and democracy are experiencing difficult days. They need the moral support of the proponents of freedom throughout the world and effective intervention by the United Nations. We categorically reject a military attack on Iran. At the same time, we ask you and all of the world’s intellectuals and proponents of liberty and democracy to condemn the human rights violations of the Iranian state. We expect from Your Excellency, in your capacity as the Secretary-General of the United Nations, to reprimand the Iranian government – in keeping with your legal duties – for its extensive violation of the articles of the Universal Declaration of Human Rights and other international human rights covenants and treaties.

Above all, we hope that with Your Excellency’s immediate intervention, all of Iran’s political prisoners, who are facing more deplorable conditions with every passing day, will soon be released. The people of Iran are asking themselves whether the UN Security Council is only decisive and effective when it comes to the suspension of the enrichment of uranium, and whether the lives of the Iranian people are unimportant as far as the Security Council is concerned.

The Manhattan in The Manhattan Project

In the NYT:

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In “The Manhattan Project” (Black Dog & Leventhal), published last month, Dr. Norris writes about the Manhattan Project’s Manhattan locations. He says the borough had at least 10 sites, all but one still standing. They include warehouses that held uranium, laboratories that split the atom, and the project’s first headquarters — a skyscraper hidden in plain sight right across from City Hall.

“It was supersecret,” Dr. Norris said in an interview. “At least 5,000 people were coming and going to work, knowing only enough to get the job done.”

Manhattan was central, according to Dr. Norris, because it had everything: lots of military units, piers for the import of precious ores, top physicists who had fled Europe and ranks of workers eager to aid the war effort. It even had spies who managed to steal some of the project’s top secrets.

“The story is so rich,” Dr. Norris enthused. “There’s layer upon layer of good stuff, interesting characters.”

Still, more than six decades after the project’s start, the Manhattan side of the atom bomb story seems to be a well-preserved secret.

Two Women, Two Histories: A feminist, an antifeminist, and their exercise of power

From Harvard Magazine:

As the second world war drew to a close, two women thought about applying to Harvard Law School.

Pauli_2 The first was an African-American native of North Carolina, the granddaughter of a slave and the great-granddaughter of a slave-owner, who had moved North for college, survived the lean years of the Depression, befriended Eleanor Roosevelt, and sought unsuccessfully to do graduate work in sociology at the all-white University of North Carolina. When instead she finished Howard Law School at the top of her class, she sought the fellowship traditionally awarded to Howard’s best student: a year at Harvard to complete a master’s of law degree. But, wrote the admissions committee, “Your picture and the salutation on your college transcript indicate that you are not of the sex entitled to be admitted to Harvard Law School.”

The second woman who thought about applying to law school was a Midwesterner of Scottish descent, educated in Catholic schools paid for by her mother’s hard-earned wages. After politely defying her teachers by declining a full scholarship to a local Catholic college, this woman spent the war acing a full course load in political science at her state’s best university by day, and working eight-hour shifts testing firearms in a munitions factory by night. Phyllis_2 Upon her graduation, Columbia, Radcliffe, and Wellesley all offered her financial aid for graduate study; she chose correctly, and so impressed her Radcliffe professors that one offered to sponsor her application to law school. The steep cost of a legal education led her to decline, and she was off to Washington to seek a job in the federal government.

The first woman was Pauli Murray, whose remarkable contributions to American legal and women’s history are beginning to be recognized, thanks in large part to the voluminous personal papers she left to the Radcliffe Institute’s Schlesinger Library. The second woman is, quite decidedly and proudly, not a feminist icon. She is Phyllis Schlafly, A.M. ’45, who some say is more responsible than anyone for the rise of grassroots religious conservatism and the transformation of the Republican Party, and who all agree can take the lion’s share of credit or blame for the defeat of the Equal Rights Amendment and the rise of antifeminism as a force in American politics.

More here.

Low Buzz May Give Mice Better Bones and Less Fat

From The New York Times:

Bone All he does is put mice on a platform that buzzes at such a low frequency that some people cannot even feel it. The mice stand there for 15 minutes a day, five days a week. Afterward, they have 27 percent less fat than mice that did not stand on the platform — and correspondingly more bone. While some scientists are enthusiastic, others are skeptical. The mice may be less fat after standing on the platform, these researchers say, but they are not convinced of the explanation — that fat precursor cells are turning into bone.

“Bone is notorious for ‘use it or lose it,’” Dr. Rubin said. “Astronauts lose 2 percent of their bone a month. People lose 2 percent a decade after age 35. Then you look at the other side of the equation. Professional tennis players have 35 percent more bone in their playing arm. What is it about mechanical signals that makes Roger Federer’s arm so big?”

At first, he assumed that the exercise effect came from a forceful impact — the pounding on the leg bones as a runner’s feet hit the ground or the blow to the bones in a tennis player’s arm with every strike of the ball. But Dr. Rubin was trained as a biomechanical engineer, and that led him to consider other possibilities. Large signals can actually be counterproductive, he said, adding: “If I scream at you over the phone, you don’t hear me better. If I shine a bright light in your eyes, you don’t see better.”

Over the years, he and his colleagues discovered that high-magnitude signals, like the ones created by the impact as foot hits pavement, were not the predominant signals affecting bone. Instead, bone responded to signals that were high in frequency but low in magnitude, more like a buzzing than a pounding.

More here.

Monday, October 29, 2007

Sunday, October 28, 2007

Zajal, think hip-hop, rap and toasting

Ed Emery in Le Monde Diplomatique:

Lebanon’s Ghada Shbeir won the BBC Radio 3 World Music Awards this June and, with them, the West discovered Muwashshah, an Arab versified musical form that was previously known just to a handful of scholars. The Palestinian singer Reem Kilani has also helped Britain discover this music, which exists alongside a related form known as Zajal. Like Muwashshah, it is a strophic poetic form much loved and prized by Arabs the world over.

Although it is sung and has music, Zajal is not often performed in the West, for simple reasons: it is an art of poetic duelling in which two poets challenge each other with improvised verses, and each has to respond in kind. It is performance art, emulative poeteering between men. It is not a free-for-all, but takes place within established conventions. Think hip-hop, rap, Jamaican dancehall and toasting.

Since its performance depends on text, it needs an audience who can understand its meanings, cross-references, puns and interplays. And feedback from the audience – appreciative noises, rhythmic clapping and repeating of sung refrains – is necessary for its poets to perform their art, so Zajal could not easily transfer to the alienated spaces of the World Music stage.

Comments on Gregory Clarks’ A Farewell to Alms: A Brief Economic History of the World

Samuel Bowles offers some interesting remarks (in the October 19th issue of Science):

Clark’s thesis is that the industrial revolution occurred when and where it did (England, late 18th century) because from 1250 on wealthy Englishmen passed their distinctive values of diligence, patience, and prudence on to their children who were more numerous and became wealthier than the children of other families (who lacked these values), the result being a gradual spread of these values in the population, eventually accounting for England’s take off. The following data and reasoning amplify points made in the review and suggest some empirical shortcomings of the thesis…

5. If parent-child personality similarity is due entirely to parent child transmission – whether genetic or cultural – it will dissipate rapidly, accounting for a very modest correlation of traits over 4 or more generations. Clark’s argument concerns fathers and sons. We assume that mating assortment can be ignored, given the evidence Clark offers for “great social mobility and fluidity… in medieval England” (p. 161). Let the intergenerational correlation of a trait be r. Then if genes are not involved and the only direct influence of vertical cultural transmission on sons is by fathers (not grandfathers, etc.), the correlation across n generations is r^(n -1).

Krugman on the Chances for Universal Health Care

Ezra Klein interviews Krugman in The American Prospect:

EK: And why do you think there’s slight better than even odds that we can get it? Why will this time succeed when so many others failed?

PK: First, there’s a progressive movement where there wasn’t one before. Clinton came in when the Democratic Party was basically an uncoordinated coalition of people with their own special interests. There is a real progressive movement now. They’ve learned something from the debate. And health care itself, a lot of the sense of crisis over health care in ’92 was because the economy was in recession, and things got better on the health care front and the economy recovered even as Clinton was trying to get plan through. This time around private health insurance has been declining even in the midst of economic recovery, so the crisis is that much deeper. And because of the progressive movement, the Democrats have more or less coalesced on a plan. LBJ passed Medicare in July of ’65 because he hit the ground running and knew what he wanted. Clinton didn’t give his first speech on health care until September ’93. This time around, we hope, if it’s a Democrat in the White House, that he or she will be much closer to the position that Johnson was in when he passed Medicare.

A Review of Oliver Sacks’ Musicophila: Tales of Music and the Brain

Anthony Gottlieb in the NYT Book Review:

[Sacks’] new collection starts quite literally with a bolt from the blue, when a 42-year-old surgeon, Tony Cicoria, was struck by lightning in 1994. Cicoria’s heart apparently stopped, but he was resuscitated, and a few weeks later he was back at work. Everything seemed normal until this fan of rock music was suddenly seized by a craving for classical piano music. He bought recordings, acquired a piano and began to teach himself to play. Then his head began to be flooded with music that seemed to come, unstoppably, from nowhere. Within three months of his electrocution, Cicoria had little time for anything other than playing and composing.

A dozen years later, Cicoria is still an extreme musicophiliac but has no desire to investigate his own condition with the finer-tuned forms of brain scanning that are now available. He has come to see his condition as a “lucky strike.” The music in his head is, he says, “a blessing … not to be questioned.” (He was certainly lucky not to be killed. Standing in thunderstorms cannot yet be recommended as a new answer to the old question of how to get to Carnegie Hall.)

Thanks to the willingness of others to be scanned, though, we now know that musicians’ brains are different.

Facebook Electoral Segmentation and Target Political Marketing

Henry Farrell over at Crooked Timber:

Republican Internet consultant Patrick Ruffini points to this fascinating resource for figuring out the raw numbers of liberal, moderate and conservative Facebook users interested in a specific issue. Don’t try to create a flyer or whatever – just go to the “targetting” section, type the topic that you are interested in into the keywords section, and see how the numbers change whether you click Liberal, Moderate and Conservative (there’s further microtargeting of cities etc available too). For example, about 2,520 self-declared liberal Facebook users declare blogging as one of their interests, as opposed to 1,320 moderates and 1,100 conservatives. 5,180 liberals show the good taste to declare My Bloody Valentine as one of their favourite bands, as opposed to 1,120 moderates, and only 340 conservatives. Less obviously, the number of liberals (7,300) and conservatives (7,580) who like bluegrass music is about the same1. Obviously, treat these numbers with extreme caution; there is no way that Facebook users are a random sample of the population 2, but still, this promises much idle entertainment.

If the World Could Write . . .

From The Washington Post:

War_2 Though Stendhal’s Charterhouse of Parma helped teach Tolstoy how to describe battle, most of War and Peace might be likened to a compact version of Balzac’s multi-volume Com¿die humaine. In these pages an old man’s heirs connive over his fortune. Parents strive to marry off their worthless children for money and status. Couples form and break up, young girls attend balls, their admirers quarrel and duel, fortunes are lost at cards, babies are born, families face social or financial ruin, and the most cherished dreams are dashed. The book never flinches from showing us deliberate cruelty, repeated heartbreak and survivor guilt.

While his villains never change, only worsen, Tolstoy’s heroes evolve, deepen, see more clearly into the nature of things. Society, the novelist believes, corrupts us because it is built on falsity and pretense, on role-playing and the acceptance of the unreal. It’s all opera. Only the very young and the very holy can ignore the pervasive artificiality. “As with all people, the moment she looked in the mirror, her face assumed a strained, unnatural, bad expression.” However, those chastened by suffering or allowed ecstatic moments of insight may sometimes escape the world’s meretricious allure.

As its title suggests, the novel examines two opposing realms, alternative paths through life. Tolstoy repeatedly contrasts war and peace, the artificial and the natural, erotic torment and family happiness, the city and the country, Moscow and St. Petersburg, Germanic military tactics and Slavic submission to the force of history, intellectual complexities and Christian simplicities, this world and the next.

More here.

Decisions, Decisions…

From Science:

Decisions_2 Who hasn’t agonized over a major decision in life, whether to accept a job offer, move house, or perhaps switch research fields? We are confronted with a multitude of decisions on a daily basis. Many decisions are trivial and can be dealt with in seconds. However, others may have wider ramifications and can be excruciatingly complicated. In the past few years, our understanding of the underlying processes of decision-making has progressed markedly. This neuroscience special issue highlights some of the most exciting developments in this area.

Koechlin and Hyafil review recent experimental studies that provide new insights into the function and connectivity of the anterior prefrontal cortex, which forms the apex of the executive system underlying decision-making. The authors propose an original model of the anterior prefrontal function and provide a theoretical framework for addressing major unresolved issues and guiding future research on decision-making and higher cognition.

More here.