After you memorize something, you can apparently burn it into your brain by exercising about four hours later.
Tag Archives: education
bicycles, airships, and things that go
I have read Cars, Trucks, and Things that Go to my 3 year old son at least 100 times. It is his favorite book in the world. I didn’t have a lot to do with this – I actually tried to steer him more toward animals and nature, but his fascination with wheels began shortly after birth and shows no signs of abating. It’s clearly baked in to his genetic makeup, which is interesting considering that almost all evolution of our genetic makeups happened before cars, trucks or other things that go (other than legs and muscles) ever existed. Perhaps humans, and the male of the species in general, just have an instinctive attraction to power, whether it comes from harnessing animals or burning things and then transferring that power through mechanical or electrical means. That would clearly give us an advantage and it makes total sense, but it is amazing that it emerges within months of birth.
I’m not going to censor Cars and Trucks and Things that Go. But there is a lot of pollution and unsafe road conditions in those books, plus head-scratching things like children driving cars, and enormous pileups where nobody gets hurt. So I think it’s great that some people are trying to update that classic winning formula with updated and more sustainable technology choices. Of course, kids don’t need to be brainwashed in the latest urban planning buzzwords, they need to be educated in how to think about systems so they can reach the right conclusions and make the right choices when they grow up. They also need to be entertained. We’ll see if this succeeds.
2015 Year in Review
I’m going to try picking the most frightening, most hopeful, and most interesting post from each month. If the most interesting is also the most frightening or most hopeful, I’ll pick the next most interesting. Then I’ll have 12 nominees in each category and I’ll try to pick the most frightening, hopeful, and interesting posts of the year.
Most frightening: Johan Rockstrom and company have updated their 2009 planetary boundaries work. The news is not getting any better. 4 of the 9 boundaries are not in the “safe operating space”: climate change, loss of biosphere integrity, land-system change, altered biogeochemical cycles (phosphorus and nitrogen).
Most hopeful: It is starting to seem politically possible for the U.S. to strengthen regulation of risk-taking by huge financial firms.
Most interesting: Taxi medallions have been called the “best investment in America”, but now ride-sharing services may destroy them.
Most frightening: There are some depressing new books out there about all the bad things that could happen to the world, from nuclear terrorism to pandemics. Also a “financial black hole”, a “major breakdown of the Internet”, “the underpopulation bomb”, the “death of death”, and more!
Most hopeful: A new study suggests a sudden, catastrophic climate tipping point may not be too likely.
Most interesting: Government fragmentation explains at least part of suburban sprawl and urban decline in U.S. states, with Pennsylvania among the worst.
Most frightening: The drought in California and the U.S. Southwest is the worst ever, including one that wiped out an earlier civilization in the same spot. At least it is being taken seriously and some policies are being put in place. Meanwhile Sao Paulo, Brazil is emerging as a cautionary tale of what happens when the political and professional leadership in a major urban area fail to take drought seriously. Some people are predicting that water shortages could spark serious social unrest in developing countries.
Most hopeful: If we want to design ecosystems or just do some wildlife-friendly gardening, there is plenty of information on plants, butterflies, and pollinators out there. There is also an emerging literature on spatial habitat fragmentation and how it can be purposely designed and controlled for maximum benefit.
Most interesting (I just couldn’t choose between these):
- Innovation in synthetic drugs is quickly outpacing the ability of regulatory agencies to adapt. (I struggled whether to put this in the negative or positive column. Drugs certainly cause suffering and social problems. But that is true of legal tobacco and alcohol, and prescription drugs, as well as illegal drugs. The policy frameworks countries have used to deal with illegal drugs in the past half century or so, most conspicuously the U.S. “war” on drugs, have led to more harm than good, and it is a good thing that governments are starting to acknowledge this and consider new policies for the changing times.)
- “Germ-line engineering is much further along than anyone imagined.” This means basically editing the DNA of egg and sperm cells at will. I put this in the positive column because it can mean huge health advances. Obviously there are risks and ethical concerns too.
Most frightening: A group of well-known economists is concerned that the entire world has entered a period of persistently low economic growth, or “secular stagnation“.
Most hopeful: Donald Shoup, author of The High Cost of Free Parking, is retiring. That might sound bad, but his ground-breaking ideas are continuing on and actually seem to be going mainstream.
Most interesting:
- Biotechnology may soon bring us the tools to seriously monkey with photosynthesis. (This is one of those stories where I struggle between the positive and negative columns, but clearly there is a potential upside when we will have so many mouths to feed.)
- Peter Thiel thinks we can live forever. (positive, but do see my earlier comment about mouths to feed…)
Most frightening: We’ve hit 400 ppm carbon dioxide in the atmosphere, not just some places sometimes but pretty much everywhere, all the time.
Most hopeful: The rhetoric on renewable energy is really changing as it starts to seriously challenge fossil fuels on economic grounds. Following the Fukushima disaster, when all Japan’s nuclear reactors were shut down, the gap was made up largely with liquid natural gas and with almost no disruption of consumer service. But renewables also grew explosively. Some are suggesting Saudi Arabia is supporting lower oil prices in part to stay competitive with renewables. Wind and solar capacity are growing quickly in many parts of the world.Lester Brown says the tide has turned and renewables are now unstoppable.
Most interesting: Human chemical use to combat diseases, bugs, and weeds is causing the diseases, bugs and weeds to evolve fast.
Most frightening: One estimate says that climate change may reduce global economic growth by 3% in 2050 and 7-8% by 2100. Climate change may also double the frequency of El Nino. The DICE model is available to look at climate-economy linkages. Dennis Meadows and Jorgen Randers describe what a coming long, slow decline might look like. Rising temperatures in the Arctic are drying things out, leading to more fires, which burns more carbon, which raises temperatures, in an accelerating feedback loop.
Most hopeful: Stock values of U.S. coal companies have collapsed.
Most interesting: According to Paul Romer, academic economics has lost its way and is bogged down in “mathiness”.
Most frightening: James Hansen is warning of much faster and greater sea level rise than current mainstream expectations.
Most hopeful: Edible Forest Gardens is a great two book set that lays out an agenda for productive and low-input ecological garden design in eastern North America. You can turn your lawn into a food forest today.
Most interesting:
- Sherlock Holmes had a full-proof recipe for creative problem solving: music+drugs+thinking.
- CRISPR is being talked about as a game-changing genetic engineering breakthrough with enormous implications for medicine.
Most frightening: Steven Hawking is worried about an artificial intelligence arms race starting “within years, not decades”.
Most hopeful: It may be possible to capture atmospheric carbon and turn it into high-strength, valuable carbon fiber. This sounds like a potential game-changer to me, because if carbon fiber were cheap it could be substituted for a lot of heavy, toxic and energy-intensive materials we use now, and open up possibilities for entirely new types of structures and vehicles.
Most interesting:
- “gene drive” technology helps make sure that genetically engineered traits are passed along to offspring.
- Technology marches on – quantum computing is in early emergence, the “internet of things” is arriving at the “peak of inflated expectations”, big data is crashing into the “trough of disillusionment”, virtual reality is beginning its assent to the “plateau of productivity”, and speech recognition is arriving on the plateau. And super-intelligent rodents may be on the way.
- Robotics may be on the verge of a Cambrian explosion, which will almost certainly be bad for some types of jobs, but will also bring us things like cars that avoid pedestrians and computer chips powered by sweat. I for one am excited to be alive at this moment in history.
Most frightening: Climate may be playing a role in the current refugee crisis, and the future may hold much more of this.
Most hopeful: The right mix of variety and repetition might be the key to learning.
Most interesting: Edward Tufte does not like Infographics.
Most frightening: Corrupt Russian officials appear to be selling nuclear materials in Moldova.
Most hopeful: Elephants seem to have very low rates of cancer. Maybe we could learn their secrets.
Most interesting: Stephen Hawking is worried about inequality and technological unemployment.
Most frightening: I noticed that Robert Costanza in 2014 issued an update to his seminal 1997 paper on ecosystem services. He now estimates their value at $125 trillion per year, compared to a world economy of $77 trillion per year. Each year we are using up about $4-20 trillion in value more than the Earth is able to replenish. The correct conclusion here is that we can’t live without ecosystem services any time soon with our current level of knowledge and wealth, and yet we are depleting the natural capital that produces them. We were all lucky enough to inherit an enormous trust fund of natural capital at birth, and we are spending it down like the spoiled trust fund babies we are. We are living it up, and we measure our wealth based on that lifestyle, but we don’t have a bank statement so we don’t actually know when that nest egg is going to run out.
Most hopeful: There are plenty of ways to store intermittent solar and wind power so they can provide a constant, reliable electricity source.
Most interesting: Asimov’s yeast vats are finally here. This is good because it allows us to produce food without photosynthesis, but bad because it allows us to produce food without photosynthesis.
Most frightening: Cyberattacks or superflares could destroy the U.S. electric grid.
Most hopeful: We had the Paris agreement. It is possible to be cynical about this agreement but it is the best agreement we have had so far.
Most interesting: I mused about whether it is really possible the U.S. could go down a fascist path. I reviewed Robert Paxton’s five stages of fascism. I am a little worried, but some knowledgeable people say not to worry. After reading Alice Goffman’s book On the Runthough, one could conclude that a certain segment of our population is living in a fascist police state right now. There is some fairly strong evidence that financial crises have tended to favor the rise of the right wing in Europe.
DISCUSSION
Well, one thing that certainly jumps out on the technology front is biotechnology. We have a couple articles about the possibility of drastic increases in the human lifespan, and what that would mean. “Germ-line engineering”, “gene drive”, and “CRISPR” are all ways of monkeying with DNA directly, even in ways that get passed along to offspring. To produce more food, we may be able to monkey with the fundamentals of photosynthesis, and if that doesn’t work we can use genetically engineered yeast to bypass photosythesis entirely.
At the risk of copyright infringement, I am reproducing the “Gartner hype cycle” below, which was mentioned in one of the posts from August.
Government and corporate labs have been making huge advances in biotechnology in the last decade or so, so it is well beyond the “innovation trigger”. It has not yet reached the “peak of inflated expectations” where it would explode onto the commercial and media scene with a lot of fanfare. I expect that will happen. We will probably see a biotech boom, a biotech bubble, and a biotech bust similar to what we saw with the computers and the internet. And then it will quietly pervade every aspect of our daily lives similar to computers and the internet, and our children will shrug and assume it has always been that way.
Obviously there are dangers. A generation of people that refuse to die on time would be one. Bioterrorism is obviously one. Then there is the more subtle matter that as we raise the limit on the size our population and consumption level can attain, the footprint of our civilization will just grow to meet the new limit. When and how we come up against these limits, and what to do about it, is the subject of the updates to two seminal papers on these issues, by Rockstrom and Costanza. We have entered an “unsafe operating space” (Rockstrom), where we are depleting much more natural capital each year than the planet can replenish (Costanza), and there will be consequences. The Paris agreement is one hopeful sign that our civilization might be able to deal with these problems, but even if we deal with the carbon emission problem, it might be too late to prevent the worst consequences, and there are going to be “layers of limits” as the authors of Limits to Growth put it all those decades ago. If we take care of the global warming problem and figure out a way to grow food for 50 billion people, eventually we will grow to 50 billion people and have to think of something else.
So without further ado:
Most frightening: I can’t pick just one. In the relatively near term, it’s the stalling out of the world economy; the convergence of climate change, drought, and the challenge of feeding so many people; and the ongoing risks from nuclear and biological weapons.
Most hopeful: I see some hope on energy and land use issues. The Paris agreement, combined with renewable energy and energy storage breakthroughs, the potential for much more efficient use of space in cities rather than letting cars take up most of the space, are all hopeful. The possibility of making carbon fiber out of carbon emissions is a particularly intriguing one. At my personal scale, I am excited to do some sustainable gardening of native species that can feed both people and wildlife. I don’t expect my tiny garden to make a major difference in the world, but if we all had sustainable gardens, they were all connected, and we weren’t wasting so much space on roads and parking, it could start adding up to a much more sustainable land use pattern.
Most interesting: I’ve already mentioned a lot of stuff, so I will just pick something I haven’t already mentioned in the discussion above: the rise of synthetic drugs. It’s just an interesting article and makes you think about what it will mean to have advanced chemical, information, and biological technologies in the hands of the little guy, actually many, many little guys. It is a brave, new, dangerous, exciting world indeed. Happy new year!
children and patterns
Here’s an interesting article in The Chronicle of Higher Education about Laszlo Polgár, a Hungarian who set out to turn his daughters into chess prodigies, and succeeded. A few interesting quotes:
There are three Polgár sisters, Zsuzsa (Susan), Zsofia (Sofia), and Judit: all chess prodigies, raised by Laszlo and Klara in Budapest during the Cold War. Rearing them in modest conditions, where a walk to the stationery store was a great event, the Polgárs homeschooled their girls, defying a skeptical and chauvinist Communist system. They lived chess, often practicing for eight hours a day. By the end of the 1980s, the family had become a phenomenon: wealthy, stars in Hungary and, when they visited the United States, headline news…
Laszlo believed that physical fitness was vital to intellectual success, so the girls played table tennis several hours a day, on top of their full day of chess and schooling. The parents were tireless in their devotion, buying every chess book they could, cutting out pages with past games, gluing them to cards, and storing it all in an old card catalog. They assembled more than 100,000 games; at the time, only the Soviet Union’s restricted chess archive could match it…
By the late 1980s, researchers had established that, contrary to what you might imagine, chess masters don’t tend to anticipate more moves as they gain skill. Rather, they gain expertise in recognizing patterns of the board, and patterns built out of those patterns. A question remained, however: How do they gain those skills? …
The focus of the article is on “nature vs. nurture” and the “10,000 hour rule” or “practice makes perfect”. What caught my attention though is the idea that children have a natural aptitude for pattern recognition. And systems are about patterns. I am thinking about H.T. Odum’s beautiful system diagrams, which are essentially circuits depicting the energy flows through any type of system. The building blocks are simple but they can be combined to describe very complex behavior in systems of any physical type. (Odum would have said they describe all the important aspects of social and economic systems too, but I haven’t decided if I agree with that yet.) So if young children of roughly average mental aptitude can memorize patterns in chess, could they learn to memorize Odum’s system patterns through repetition, perhaps through games? And if all children learned general systems theory in this way, could they be prodigies in solving the world’s complex problems later on? Are we focusing on entirely the wrong things in school?
David Brooks ca. 2001
Here’s an enormously long 2001 rant by David Brooks on the ethics of college students he observed at the time.
There are a lot of things these future leaders no longer have time for. I was on campus at the height of the election season, and I saw not even one Bush or Gore poster. I asked around about this and was told that most students have no time to read newspapers, follow national politics, or get involved in crusades. One senior told me she had subscribed to The New York Times once, but the papers had just piled up unread in her dorm room. “It’s a basic question of hours in the day,” a student journalist told me. “People are too busy to get involved in larger issues. When I think of all that I have to keep up with, I’m relieved there are no bigger compelling causes.”
I find today’s new generation of young adults fascinating. On the one hand, they seem much more involved in community service than I or most people I know were at the same age. But they seem less interested in current affairs. They are extremely intelligent and well educated, and yet their intellectual engagement seems confined within fairly narrow boundaries. They seem to be about more than money and materialism, and yet they seem accepting of the existing order and willing to get ahead the best they can within the system, rather than interested in questioning the system itself. I don’t have them figured out yet. Not that I have myself completely figured out.
Raspberry Pi
Here are a bunch of resources for learning Raspberry Pi:
To make it easier to find the kind of resource you want, we’ve grouped our resources under the headings of Teach, Learn and Make. In our Teach resources you’ll find individual lesson plans, complete schemes of work and teachers’ guides, including a teachers’ guide to using Raspberry Pi in the classroom to give educators who are new to the device the information they need to get started.
Our Learn resources guide learners through independent activities. One of the newest is Gravity Simulator, in which students learn about the effects of gravity and how to simulate them in Scratch with Mooncake, the official Raspberry Pi Foundation Cat. It’s one of a number of resources that support activities linked to British ESA Astronaut Tim Peake’s upcoming mission aboard the International Space Station.
Our Make resources support physical computing projects. They range from “getting started” activities for beginners and more in-depth standalone projects to fairly substantial, satisfying builds that you might complete over several sessions. One of these resources is a guide to making a Raspberry Pi marble maze using aSense HAT. A Sense HAT is at the heart of each of the two Astro Pi flight units that will soon be flying to the International Space Station; on board the ISS its gyroscope, accelerometer and magnetometer will be able to detect how the station is moving, and this activity uses the same sensors to work out which way a virtual marble will roll.
how big is the solar system?
Here is an interesting reminder how big the solar system really is. These people used a weather balloon to represent the sun. Then the planets were marbles of varying sizes, and they had to be placed miles apart in the Nevada desert to represent the right size. They tried to measure it out accurately, then drove around in the dark and used time lapse photography to capture the orbits. Cool stuff.
September 2015 in Review
What did I learn in September? Let’s start with the bad and then go to the good.
Negative stories (-11):
- The Environmental Kuznets Curve is the idea that a developing country will go through a period of environmental degradation caused by economic growth, but then the environment will improve in the long run. Sounds okay but the evidence for it is weak. (-1)
- The Inca are an example of a very advanced civilization that was wiped out. (-1)
- Consumerism and the pursuit of wealth are not sufficient cultural glue to hold a nation together. (-1)
- Climate may be playing a role in the current refugee crisis, and the future may hold much more of this. (-1)
- North and South America would have enormous herds of large mammals if humans had never come along. (-1)
- The U.S. clearly has lower average life expectancy than other advanced countries. Developing countries in Asia and Latin America are catching up, but life expectancy in Africa is still tragically low. (-1)
- People get away with criminally violent behavior behind the wheel because police do not see it as on par with other types of crime. (-2)
- People are still suggesting a false choice between critical and creative thinking. This is not how the problems are tomorrow will be solved. (-2)
- This just in – an extreme form of central planning does not work. (-1)
Positive stories (+9):
- Pneumatic chutes for garbage collection have been used successfully on an island in New York City for decades. This technology has some potential to move us closer to a closed loop world where resources are recovered rather than wasted. (+1)
- Scientists and engineers could learn some lessons from marketing on how to communicate better with the rest of humanity. (+1)
- There is new evidence from New Zealand on economic benefits of cycling and cycling infrastructure. (+1)
- There has been some progress on New York City’s “lowline“, which is what a park in space might look like. The only problem is, it looks to me like a mall. I’ve said it before and I’ll say it again, the exciting science fiction future may look a lot like malls in space. (+0)
- The U.S. Surgeon General thinks walkable communities may be a good idea. The End of Traffic may actually be a possibility. (+3)
- Peter Singer advocates “effective altruism”. A version of his Princeton ethics course is available for free online. (+1)
- Edward Tufte does not like Infographics. (+0)
- The unpronounceable Mihaly Csikszentmihalyi believes he has found the key to happiness. (+1)
- The right mix of variety and repetition might be the key to learning. (+1)
more on homework
NPR has a roundup of recent research on homework. One near-consensus seems to be that about 10 minutes per grade level is kind of sweet spot. This is the U.S. system we’re talking about, which goes up to 12 grades so therefore two hours. I did a lot more homework than this in high school.
Let’s start with something called the spacing effect. Say a child has to do a vocabulary worksheet. The next week, it’s a new worksheet with different words and so on. Well, research shows that the brain is better at remembering when we repeat with consistency, not when we study in long, isolated chunks of time. Do a little bit of vocabulary each night, repeating the same words night after night.
Similarly, a professor of psychology at Washington University in St. Louis, Henry “Roddy” Roediger III, recommends that teachers give students lots and lots of little quizzes, which he says strengthen the brain’s ability to remember. Don’t fret. They can be low-stakes or no-stakes, says Roediger, it’s the steady recall and repetition that matter. He also recommends, as homework, that students try testing themselves instead of simply re-reading the text or class notes.
There’s also something known as interleaving… there’s evidence that students learn more when homework requires them to choose among multiple strategies — new and old — when solving problems. In other words, kids learn when they have to draw not just from what they learned in class that day but that week, that month, that year.
One last note: Experts agree that homework should generally be about reinforcing what students learned in class (this is especially true in math). Sometimes it can — and should — be used to introduce new material, but here’s where so many horror stories begin.
Peter Singer
Here’s an interesting article by Peter Singer, who teaches ethics at Princeton University. It’s an interesting question – if you really want to do the most good, should you work less and spend your time doing something really good, should you try to find a job where you get paid to doing something sort of good, or should you find a job that’s not that good but pays well, and give your money to people who are really good at doing good? Should you help one person who is suffering today, or save your money and effort so you can help more people tomorrow, maybe even people who haven’t been born yet, or even animals or plants. Do you do good things to the point of exhaustion and risk burnout, or do you take a little break and endulge yourself today, thereby conserving your mental fortitude to be good tomorrow? Everybody has to answer these questions for themselves, but the most important thing is that everyone needs to be taught from an early age to be challenging themselves with these questions. We need to think about whether each of our daily decisions and actions is ethical or not, and if not, to at least make the choice consciously and understand and accept the consequences. This may be our best defense against accidentally letting our world fall apart while we are distracted by mindless consumerism.
Two years later Wage graduated, receiving the Philosophy Department’s prize for the best senior thesis of the year. He was accepted by the University of Oxford for postgraduate study. Many students who major in philosophy dream of an opportunity like that—I know I did—but by then Wage had done a lot of thinking about what career would do the most good. Over many discussions with others, he came to a very different choice: he took a job on Wall Street, working for an arbitrage trading firm. On a higher income, he would be able to give much more, both as a percentage and in dollars, than 10 percent of a professor’s income. One year after graduating, Wage was donating a six-figure sum—roughly half his annual earnings—to highly effective charities. He was on the way to saving a hundred lives, not over his entire career but within the first year or two of his working life and every year thereafter…
Effective altruism is based on a very simple idea: we should do the most good we can. Obeying the usual rules about not stealing, cheating, hurting, and killing is not enough, or at least not enough for those of us who have the good fortune to live in material comfort, who can feed, house, and clothe ourselves and our families and still have money or time to spare. Living a minimally acceptable ethical life involves using a substantial part of our spare resources to make the world a better place. Living a fully ethical life involves doing the most good we can.
Most effective altruists are millennials—members of the first generation to have come of age in the new millennium. They are pragmatic realists, not saints, so very few claim to live a fully ethical life. Most of them are somewhere on the continuum between a minimally acceptable ethical life and a fully ethical life. That doesn’t mean they go about feeling guilty because they are not morally perfect. Effective altruists don’t see a lot of point in feeling guilty. They prefer to focus on the good they are doing. Some of them are content to know they are doing something significant to make the world a better place. Many of them like to challenge themselves to do a little better this year than last year.
Coursera has a version of Peter Singer’s Princeton course here.