Stephen Hawking gets to 70

Posted by – January 2, 2012

I’m very thankful for Stephen Hawking, not just for the insights he’s brought to science, but also for the fact he even got this far and let me live during a time of real genius.

I was born too late for the age of Einstein, Bohr and the people who surrounded them. I was even a little too young for the likes of Gell-Mann. There’s been plenty of great minds in recent years, of course, but no undoubtable geniuses of Hawking’s stature. And he wasn’t even expected to last long enough for his talent to really flower.

So, Happy Bday on Jan 8, professor.

You don’t teach physics by talking at people

Posted by – January 2, 2012

University lecturers have discovered that lecturing the old-fashioned way really doesn’t work, and that what they need to do instead is act as “coaches” for students to find answers to problems for themselves, rather than expecting them to just regurgitate factoids. Huzzah! I wish they’d reached that conclusion 40 years ago, when I was in college.

They probably knew it then, but now they can prove it, at least according to a recent National Public Radio piece. In fact, the basis for the modern conclusions themselves go as far back as 1990, when articles by physicist David Hestenes at Arizona State showed that the overall poor performance of students in his introductory physics course were because they used a “calculational” approach to exams rather than showing a true understanding of concepts.

Hestenes developed a test to find out just how much students understood fundamental concepts. After whole semester, they apparently understood only a little bit more than when they started. What’s needed is for students to actively participate in learning, Hestenes concluded, rather than passively listening to lectures and taking notes. As the NPR piece says:

This is something many people have known intuitively for a long time — the physicists just came up with the hard data. Their work, along with research by cognitive scientists, provides a compelling case against lecturing. But with budgets shrinking and enrollments booming, large classes aren’t going away. You don’t have to lecture in a lecture hall though.

Instead, you coach the students into asking correct questions about problems, but let them find the way to the answers by themselves. Take a look at this paper Hestenes published in 1997 that lays down a lot of the reasoning behind this, and which details his “teaching for structured knowledge” approach.

Personally, I think it has to go way back before university, to high school or even middle school. as Hestenes also points out. Too much of what goes on at that level is still about having the teacher tell you what something is about, then having the student repeat that in an exam. When I was at high school my physics teacher actually told the class that our job was to take down the notes he put up on the blackboard so we could repeat them in exams.

“My job is to get you through those exams,” he told us, implying at least to my ears that he wasn’t there to actually teach us anything. Little wonder my grasp of the fundamentals was so weak when I got to college, even though I did pretty well in my final high school exams.

Vaclav Havel as postmodern scientist

Posted by – December 18, 2011

It’s one of those sublime coincidences that happen from time to time that the death of one famous ideas man and orator — Christopher Hitchens — has been closely followed by that of another. Vaclav Havel was someone who did not have the notoriety of Hitchens but whose thinking and works will probably outlast him. Havel was also, in many ways, an anti-Hitchens.

Hitchens was justly famous for his hatred of all things totalitarian, but through his later publications such as “God is Not Great” also became a champion of the rationalist approach embedded in the modern scientific method. His well-publicized atheism made him a champion for many of the unreligious and earned him the condemnation of much of the religious world.

Havel was also a fervent warrior against totalitarianism. His plays and writings from the 1960s and 1970s, which were banned in his homeland of Soviet-bloc Czechoslovakia and for which he was imprisoned a number of times, became must read items in their smuggled versions in the West. Through them, and through his consistent resistance to Soviet rule, Havel was one of the leading instruments in the demise of communism. That he later became president of the free Czech homeland, and an honored and influential statesman, was a just affirmation for the man who led the Velvet Revolution in eastern Europe.

Outside of that, however, he and Hitchens had little in common. Havel was very much a person who believed in the broader mystery of the universe, and he came to see modern science as a progenitor of sorts for the kinds of problems that beset the world today. He made his points in a famous speech he gave at Independence Hall in Philadelphia on “The Need for Transcendence in the Postmodern World” in a 1994 visit to the US:

At the same time, however, the relationship to the world that the modern science fostered and shaped now appears to have exhausted its potential. It is increasingly clear that, strangely, the relationship is missing something. It fails to connect with the most intrinsic nature of reality and with natural human experience. It is now more of a source of disintegration and doubt than a source of integration and meaning. It produces what amounts to a state of schizophrenia: Man as an observer is becoming completely alienated from himself as a being.

He wasn’t against rationalism, but he believed the world hungered for more than that, for something that connected humans to a broader universe that embraced the “mystery” of the cosmos and which he believed science alone couldn’t do. He used the Anthropic Principle to back that claim and, even though current theories of the multiverse can explain why our universe is the way it is, I doubt he would be convinced. In the end, he was a believer in an indefinable something that gives life meaning beyond that which science can deliver:

Yes, the only real hope of people today is probably a renewal of our certainty that we are rooted in the earth and, at the same time, in the cosmos. This awareness endows us with the capacity for self-transcendence. Politicians at international forums may reiterate a thousand times that the basis of the new world order must be universal respects for human rights, but it will mean nothing as long as this imperative does not derive from the respect of the miracle of Being, the miracle of the universe, the miracle of nature, the miracle of our own existence. Only someone who submits to the authority of the universal order and of creation, who values the right to be a part of it and a participant in it, can genuinely value himself and his neighbors, and thus honor their rights as well.

I’d like to have seen Havel and Hitchens square up in a debate. I would have backed Hitchens in the rightness of his approach to things, but there’s always the sneaky part of me that wanted to believe something of what Havel said. It doesn’t need to involve mythical gods, but his ideal of transcendence certainly speak to the romantic in me. And he was certainly right about the division between science and society that exists today, though my guess is that much of his attitude comes from the Soviet oppression he suffered under.

Havel was a great man. I only wish he had been able to write more of those witty and perceptive plays of his. But this world would certainly have been different, and probably a whole lot worse, without him in it.

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Christopher Hitchens: A life well lived

Posted by – December 15, 2011

So Christopher Hitchens finally succumbed to his cancer and is dead at the age of 62. Not a surprise, least of all to him. He knew it was coming and faced it as well as anyone could and, I expect, did not go back on his distaste for religion and recant his atheism, though I’m sure many of his detractors hope he did.

He was a couple of years older than me, but he began his journalistic career with the New Statesman in London about the time I got interested in politics and began reading that publication and others. I’d like to say he stood out right from the beginning, but I think it took me a time to realize who this whippersnapper was. There were a lot of brilliant writers around then, and he began more as a book and arts reviewer for the Statesman.

I kept up with his writings over the years and his distinctive voice eventually began to poke through all of the noise. He wrote some great pieces about the wars and insurrections in South America, and he was an early traveler to the MIddle East and other areas well before they became the concerns they are now. But I don’t think he ever became widely known as the great polemicist he was until the last decade of his life, with “God Is Not Great” and other books which brought such praise and venom down on him, and which he clearly relished.

He was a writer, and said that’s the only thing he ever wanted to be. He did it well, better than most, and he got his voice and distinctiveness out there and managed to write a few things that got noticed and that changed the conversation, at least for a while. That’s about as good as it gets in the writing business, so he did alright.

Here’s the Vanity Fair announcement, and a Guardian writeup. There’ll be lots of others, some respectful, some no doubt gleeful he’s dead. But fuck them.

The military-industrial complex, plus Congress

Posted by – December 15, 2011

I don’t support a lot of Sen. John McCain’s views, but I found this presentation he made on the floor of Congress to be right on point. It’s not something new, and he’s made the same points before, but this is the most detailed case he’s made for the pervasive and corrupting influence of the “military-industrial-congressional” complex on the affairs of government.

He spoke on the 50th anniversary of President Eisenhower’s farewell address, in which Eisenhower first warned about the creeping takeover of government of the military-industrial complex. With the addition of Congress to that phrase, McCain is all but saying that the takeover is complete.

The fiftieth anniversary of President Eisenhower’s address presents us with a valuable opportunity today to carefully consider, have we heeded President Eisenhower’s admonition?  Regrettably and categorically, the answer is, no.

In fact, the military-industrial complex has become much worse than President Eisenhower originally envisioned. Read it, it’s a very enlightening (and frightening) piece, and I hope the new, expanded phrase gets picked up and used as extensively as Eisenhower’s has.