HN user
The fluid in high pressure storage is a liquid, making the storage much cheaper. Liquid N2 (most of air) would require over 40 times more pressure or cold temperatures. Purifying out CO2 or any gas is generally a negligible cost.
The Hungry Judge Effect has been debunked. Not that your larger point is not valid.
Also 2019
For even more detail, there is a book. http://www.madisonholleranfoundation.org
About the "faster and faster" remark, turbines will only get to about double their nominal speed without load (called runaway).
A Russian hydroelectric turbine (not too different from a flywheel) stored horizontally in a "vault" (a dam) killed 75 people. https://en.wikipedia.org/wiki/2009_Sayano%E2%80%93Shushenska...
Modern flywheels spin extremely fast in a vacuum, so supersonic is moot.
That is not a flywheel.
You are missing something (but don't worry, it is good to brainstorm like this).
At maximum speed (maximum energy storage) you want every part of the flywheel to be about to break. By introducing a non-structural material (liquid water), you have added mass but not the strength to get to higher speeds.
Imagine filling a bucket with water and spinning it around your body. All of the force to keep the bucket from flying away has to be held by the handle of the bucket. A better bucket flywheel would be all handle... Hopefully someone else can give you a better analogy.
Carbon fiber composite (not exactly plastic) is strong and light, which is what you want for a flywheel.
There a few more relevant expressions for flywheels to express that you want them to be on the edge of breaking at maximum energy storage. http://large.stanford.edu/courses/2010/ph240/wheeler1/
Link from last year https://news.ycombinator.com/item?id=13099135 and two years ago https://news.ycombinator.com/item?id=11937847
I remember getting a wide band oxygen sensor and tuning the gain in the new ECU (and by tuning I mean eventually realizing turning it all the way up minimizes steady state error). When I worked with the setup, it had no supercharger and was a lab demo for the newly reintroduced engines class. (getting to be almost a decade ago, I should go visit) Did you guys do research with it?
Speaking of engine research, kind of crazy what production engines do these days: http://www2.mazda.com/en/next-generation/technology/ https://www.infinitiusa.com/now/technology/vc-turbo-engine http://www.etagen.com/technology/
Hey stergios, I replaced your (DOS?) code with a modern aftermarket ECU.
This is close to happening. http://www.rmi.org/electricity_grid_defection
"Computerization"
Did anyone here ever use that term? Is it appropriately grouped with railways, steel and software?
"Mayvenn will send you a check for your earned commissions every month. You can do anything you want with it – pay rent, pay for your car or buy those shoes you wanted!"
From Mayvenn's site. Does this seem insulting to anyone else?
Perhaps you know the math, but I think it is important to be clear to readers that a penny earned is LESS than a penny saved.
Put another way, are making $10,000 more dollars per year and spending $10,000 less per year the same? No. You will retire exponentially (literally, if not colloquially) sooner by spending less.
The MMM resource: http://www.mrmoneymustache.com/2012/01/13/the-shockingly-sim...
About the -isms, its not Buddhism, but Stoicism.
http://www.mrmoneymustache.com/2011/10/02/what-is-stoicism-a...
I'd say that making money without spending time is investing. Maybe that's the keyword you've been missing. The obvious caveat is that on average people that try to do non-boring investing make less money.
MMM talks about a bunch of non-stock investments. Real estate and peer-to-peer come to mind.
If you want online communities for investing, pick your poison. https://www.quantopian.com http://covestor.com https://www.reddit.com/r/investing
Many schools do not do research, just teach. Perhaps that doesn't fit your definition of university, but it is not in the "dictionary" definition for what its worth. https://www.google.com/webhp?hl=en#hl=en&q=define+university
It seems like the propellers get close to each other. Usually quadcopter propellers are spaced out much more than this to reduce vibrations. Does anyone know if they do something special?
"The toilet in the powder room is so visionary, and the surrounding dimmer lights so flattering, that I had to study it for some time to figure out how it flushed."
What is this toilet???
Is it supposed to be obvious where this #Merveilles community with its icons is on the web? Am I unaware of a whole type of communities like this?
I don't know much about Pulitzers, but I'm shocked by this. I thought this piece was terrible. Maybe the people who award Pulitzers are into symphonic music.
Specifically I thought the writing had a forced enthusiasm. I think the whole premise is dull and obvious. I really didn't like the philosophical allusions. And I like classical music, DFW essays (long, poetic), and philosophy.
Maybe I'll check out what it was up against...
http://www.pulitzer.org/citation/2008-Feature-Writing
Fellow finalists (seem equally boring): Also nominated as finalists in this category were: Thomas Curwen of the Los Angeles Times for his vivid account of a grizzly bear attack and the recovery of the two victims, and Kevin Vaughan of the Rocky Mountain News, Denver, Colo., for his sensitive retelling of a school bus and train collision at a rural crossing in 1961 that killed 20 children.
This is a repost.
How does a voting ring look different than this scenario:
I email my friends (that read HN) about finally going "public." Because they are my friends and they've heard about my ideas and work for a while now, they up vote.
"There are two problems with hitting a plateau @ 300K"
Luckily, since you're making $300K you have essentially no problems outside of this. Aside from your sourpuss attitude.