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Comment Re:Already been done in China for a while (Score 1) 235 235

Yeah, but do you trust a random product purchased from AliExpress to actually meet the certifications it claims to? AliExpress has the problems of online merchants and contemporary Chinese business ethics all put together.

Comment Re:Quiz to check your implicit bias (Score 1) 398 398

This test has two main parts. First it asks you to sort between "white people and positive words" vs "black people and negative words". Then you sort between "white people and negative words" and "black people and positive words". Since you probably do the first task faster, it says you are the biased towards seeing white people as positive and black people as negative.

The problem is that just doing the test affects your judgment. When you do the first half, it trains you to build up an association between white people and positive words. Then you have to switch all of a sudden, and you are force to unlearn that association and learn a different association. Of course that is mentally confusing and you don't do as well. But that says nothing about whether you had any biases before you started taking the test.

Comment Re:And who is at the bottom? (Score 1) 432 432

If government imposed artificial scarcity and price controls is such great idea for taxis, then why shouldn't the same model be good for other areas of the economy?

Because there is only space for a certain number of vehicles on the street, and if too many taxis are circulating, there will be massive congestion?

Comment Re:Concorde 2.0 (Score 1) 238 238

One of the problems with Concorde and the Tu-144's operation was the high engine noise levels, associated with very high jet velocities used during take-off, and even more importantly flying over communities near the airport. SST engines need a fairly high specific thrust (net thrust/airflow) during supersonic cruise, to minimize engine cross-sectional area and, thereby, nacelle drag. Unfortunately this implies a high jet velocity, which makes the engines noisy which causes problems particularly at low speeds/altitudes and at take-off. Therefore, a future SST might well benefit from a variable cycle engine, where the specific thrust (and therefore jet velocity and noise) is low at take-off, but is forced high during supersonic cruise.


Comment Re:Concorde (Score 2) 238 238

One difference is that the intercontinental travel market has grown immensely since the days of the Concorde. US-Asia and Europe-Asia are gigantic flight markets that barely existed when the Concorde flew.

Also, the Concorde was designed in the 50s and 60s. There's been a lot of innovation in aeronautical engineering since then. A new supersonic plane would take advantage of that to be more efficient and quieter than the Concorde.

Comment Re:try facebooking with friends when you're 40+ (Score 1) 285 285

Is it just you?
Once I visited home and walked around with my dad, and ran into my friend's dad, Bill.
All I could think was "two old men having an old-man conversation".
Afterwards my dad told he he was surprised how much Bill had aged, while he himself had barely aged at all!

Comment Maybe I'm expecting too much... (Score 1) 818 818

but I'm surprised how low the level of discussion has been here.

Amazon, Google, etc are private companies. They are not the government. They can remove whatever they want and it's not a free speech issue.

Or have these companies reached a level of market dominance where they are like "common carriers", and if they stop selling something for political reasons, it basically means that you can't buy it anywhere and it becomes a sort of free speech issue?

That's the only potentially interesting discussion here - and nobody's having it.

Comment Another company trashes its most useful product... (Score 1) 116 116

Good, useful reviews don't appear every day. If a review is 2 years old and hundreds of people have said that it's useful, that's probably because it IS useful.

This change seems designed to turn the review section into a discussion forum where you have to reload every few minutes to participate in the latest discussion. I suppose this is good for Amazon's advertising revenue, but it's bad for customers who want to know what to buy or not to buy.

egrep -n '^[a-z].*\(' $ | sort -t':' +2.0