lewis500

8 ms·

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Traffic Vis: Traffic Theory Explained Visually(trafficvis.com)
77 points by lewis500 7y ago|8 comments
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by lewis500 7y ago
I write little academic papers for a living as a professor. I think this is good advice on how to write like cormac mccarthy. More important is to pick an academic writer whose journal articles you love and copy them. One of my favorites is
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by lewis500 7y ago
Me too. I think that because of the meta programming capabilities we’re going to see a lot more development in that direction. Recently I started using Turing.jl, which uses a sort of declarative syntax that was easy to write and understand
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by lewis500 7y ago
I just thought it might be nice if you did a breakdown of the physics of traffic and maybe how you coded that part. As for teaching, I think it could be used to teach about like signal timing etc in a fun way.
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by lewis500 7y ago
Do you have a writeup of the traffic simulation rules that you're using? I peeked in the code and saw the intelligent driver model is being used for acceleration. I suppose you also have a lane-changing model and such, too. Your archit
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by lewis500 8y ago
I agree I would recommend industry to almost everyone. In fact, engineers ask me about grad school several times per year and I almost always discourage them. Too many people think of grad school as sort of a vague "next step" tha
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by lewis500 8y ago
I don’t think they’re excuses. They’re explanations of how things happen. The asymmetrical relationship especially explains how professors can get away with treating students badly, but it isn’t a justification. If you read Bad blood, for i
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by lewis500 8y ago
I’m a professor. I have a few thoughts about this. First, the grad student/professor relationship is inherently asymmetrical, much more so than most employer/employee relationships. The degree has to last years or else you get not
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by lewis500 8y ago
If supply and demand matters then it would seem employment does not exist because of societal wish for people to justify their existence with madeup jobs, but rather because of many independent decisions between workers and employers. This
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by lewis500 8y ago
“We keep inventing jobs because of this false idea that everybody has to be employed at some kind of drudgery…. He must justify his right to exist.” This is a framing designed to get attention but is obviously empty. "We" don&#x27
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by lewis500 8y ago
Why isn't it a flying three-wheeler?
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by lewis500 8y ago
This is the type of decision-making the authors of the Green New Deal need to grapple with. E.g., the Green New Deal calls for high speed rail everywhere. But when you actually try to build HSR people in affected communities file lawsuits a
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by lewis500 8y ago
The weird thing is that, even though a lot of policy is oriented toward making you a conscious consumer (high deductibles, coinsurance) in many cases you just can’t do it,at least not very well. My wife got an allergy test at a local allerg
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by lewis500 8y ago
Normally when markets have so much unsold inventory, prices fall to clear it out. But prices can be "sticky" and won't go down. All this unsold inventory makes you wonder why the prices are so sticky. Here you can see one rea
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by lewis500 8y ago
It’s inaccurate to say that we “can’t” escape it. The federal reserve has been raising interest rates to slow inflation and growth in employment, and for years they have paid interest on bank reserves at the fed and constantly talked up pla
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by lewis500 8y ago
I think this mainly makes a difference with regard to reading the code. I'm looking at a struct in someone's code and ask myself "How does this thing get used?" With classes I'll be able to see its methods right awa
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by lewis500 8y ago
> Do colleges exist to promote education and intellectual curiosity or to train workers? I don't really think the teaching part at most universities oriented toward training workers. If they were oriented toward training workers, th
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by lewis500 8y ago
wow this is brutal. thanks for sharing. I had mused on the idea of pitching them an opinion piece about my field, traffic, but not anymore.
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by lewis500 8y ago
Why does it say "homes" when the first sentence says "urban housing stock"?
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by lewis500 8y ago
Why would a country want to buy up only shares of companies in that country? You could have a large sovereign wealth fund, but most countries are very small and it would not make sense to only buy domestic stocks.
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by lewis500 8y ago
Don’t get me wrong. I think the actual activities parents get their kids to do can be wonderful experiences, especially if you undertake them on your own. What I’m skeptical of is that these experiences hydraulically translate into success
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by lewis500 8y ago
Latex lets you write equations quickly. Whether that makes it worthwhile to learn depends on how many equations you write and how quickly you want to be able to change them. I also like being able to write my papers in vscode, with all the
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by lewis500 8y ago
Looking back on my own childhood, I'm skeptical how much anything alleged to "enrich" the children actually made a difference. I recall most of all piano lessons. When I was a kid, every kid had to learn piano. Today, no adul
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by lewis500 8y ago
I don't understand why Musk is so invested in the idea of cars in tunnels. Does he really have a substantially better tunnel boring machine/tunnel boring workflow? If so, there are lots of things to use it for other than car tunne
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by lewis500 8y ago
There is a network effect. Imagine if you made a ridesharing app with only one driver. No one would use the app due to high wait times. That's an edge case but it gets the point across: too few drivers and no one will use your app, and
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by lewis500 8y ago
I’m obviously joking about wishing they got bad results.
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by lewis500 8y ago
I keep trying to get my semi-retired parents to change their lifestyle, but unfortunately they keep getting blood tests which say their cholesterol and blood pressure and such are perfect. It is all the more frustrating because my dad smok
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by lewis500 8y ago
The subsidy ratio here is incredible. Alabama has used subsidies to lure automakers and other factories, but our incentives are peanuts compared to this. For example, we are getting a $1.7 billion Toyota-Mazda plant for $350 million in ince
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by lewis500 8y ago
Would've been good if, in spite of just being text and a few buttons, it had been built with react, redux, redux-saga and had some contorted webpack build resulting in five JS bundles.
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by lewis500 8y ago
"This revolutionary theory – his Liquidity Preference Theory – is still considered too radical to be acceptable today." What? Liquidity preference was taught in my undergrad macro class using the textbook by Greg Mankiw. It's

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