The link goes to a presentation, which is quite light on detail...
...the company did say the total cost would be offset by the rise in property values... Homes built nearby would be worth more
Property values will only rise in the immediate vicinity of the station. Properties further away may also rise in value, but it depends on accessibility - and that will almost certainly require additional transport infrastructure, which is a cost on the city.
...freight shipments would arrive sooner...
Freight and people on the same line? Pretty sure Amtrak does that in the US, and it doesn't work out very well.
...workers traveling between the two cities would spend less time commuting and more time working.
Yeah, whatever.
"We've said that, generally speaking, a Hyperloop system can be built at 50 [percent] to 60 [percent] of the cost of high-speed rail because Hyperloop technology requires less intensive civil engineering, its levitated vehicles produce fewer maintenance issues and its electric propulsion occupies far less of the track than high-speed rail," the company says
Water is the fuel, sunlight is merely a power source. The solar arrays could be replaced with whatever power source you want - RTG, fission reactor, Li-ion battery, etc.
39 days to Mars with ion propulsion? Show me your "calculation." DAWN took 9 months, I want to see how you got a 690% improvement without using a megawatt of power or technology less than TRL 7, and how much delta-v you expect the launch vehicle to contribute.
Ion thrusters don't depend on chemical reactions. Ionization is through colliding a high-energy electron with the propellant, and then the ionized propellant is accelerated.
Using hydrogen is pretty dumb because you're trying to generate thrust. F=ma. Hydrogen has low mass.
They've been testing this for awhile. AFF (Autonomous Formation Flight) from 2001 is the first project I know about. The challenge is in the guidance and control system - it must be able to keep the trailing aircraft within inches of the desired position (12 inches for AFF) and maintain position through maneuvers and disturbances.
Enforcement is the problem. When texting is banned, people put the phones down in their lap to text so that the cops can't see the phones up on top of the steering wheel while they're texting and watching the road.
Where are you in LA? I've been in LA area the past 5 years. Live in West LA and I've gone to just about everywhere as far east as San Gabriel Valley. The only place I've had terrible T-mobile coverage is Palos Verdes, but my understanding is that all the carriers suck there since no one wants cell towers cheapening their property.
You're forgetting the purpose of a rocket: to put something useful into space. Getting a rocket and a bunch of fuel into space is worthless by itself. More fuel means less payload.
I agree with you about Finder, but for home/end of a line, just press CMD+Left/Right. This just an idiosyncrasy of the OS, like pressing CMD+Down/Up to navigate folders instead of Enter and...is there even a "up one folder level" shortcut in Windows?
Copyright was seen as necessary evil to protect investments into expensive R&D.
Those are patents, not copyright. Copyright is intended to help content creators profit from their work so they can make a living and create more content.
SEP has been in regular use for over a decade now...first EP-powered deep space mission was in 1998 (Deep Space 1), and just about every Earth-orbiting satellite relies on EP.
Anandtech mentions that the 520 went through a year of testing, so it should be much more reliable than other SF-2200 SSDs. Also fixed a BSOD issue in one of their systems, which was also using SF-2281.
It's not about what's good for the consumer, it's about what's good for non-Chinese economies. China did the same thing with rare earths – undercut all competitors and eventually produce more than 90% of the world's rare earth supply. Then they used that to control prices and where the refining and production takes place (hint: not anywhere overseas). They basically control the high-tech economy and wind turbine production (which need rare earth magnets). Who wants that for soloar panels too?
IMHO all of these products, including motors for hybrid vehicles, are too important to allow China to trivial blackmail the rest of the world at their pleasure. All that is needed is the US government to guarantee purchase at some set price and dozens of new mines would open overnight in the US.
Opening new mines or even just re-opening the old mine in Mountain Pass, CA, can't happen "overnight." It will take at least seven years to open a new mine (http://www.gao.gov/new.items/d10617r.pdf).
The first thing that needs to be understood is that nothing is simple in space. Space WANTS to kill everything, whether it freezes it, melts it, or simply irradiates it into useless bits of materials.
Everything put into space is designed for specific thermal, radiation, power, propulsion, and communications requirements. Sending Magellan to Mercury instead of Venus would not have worked. Similarly, sending ISS to the Moon won't work. It was designed for the thermal and radiation environment in LEO. It wasn't designed with the power to support a bunch of Hall or ion thrusters powerful enough to move it anywhere – and no, chemical is not an option. Communications might still work, depending on how much bitrate you expect to get, but that'll be a big loss going from LEO to the moon.
As countries develop, birthrate goes down. More specifically, birthrate and family size trends down as women are educated and child mortality goes down. Not exactly starvation, but keeping poor nations poor is a problem, not a solution.
But I thought we were still using Intel 80386SX chips in NASA cause apparently radiation hardening takes decades, but yet a consumer grade phone is fine?
either someone is full of shit on the radiation hardening, or that's one fucking amazing phone!
An iPhone is also going to ISS. According to NASA, "[the iPhone] will be housed inside a small research platform built by NanoRacks," (http://www.nasa.gov/mission_pages/shuttle/behindscenes/whatsgoingup135.html) so presumably the Nexus phones are, too.
Slashdot Mirror
The link goes to a presentation, which is quite light on detail...
...the company did say the total cost would be offset by the rise in property values... Homes built nearby would be worth more
Property values will only rise in the immediate vicinity of the station. Properties further away may also rise in value, but it depends on accessibility - and that will almost certainly require additional transport infrastructure, which is a cost on the city.
...freight shipments would arrive sooner...
Freight and people on the same line? Pretty sure Amtrak does that in the US, and it doesn't work out very well.
...workers traveling between the two cities would spend less time commuting and more time working.
Yeah, whatever.
"We've said that, generally speaking, a Hyperloop system can be built at 50 [percent] to 60 [percent] of the cost of high-speed rail because Hyperloop technology requires less intensive civil engineering, its levitated vehicles produce fewer maintenance issues and its electric propulsion occupies far less of the track than high-speed rail," the company says
Spoken like someone who's never built anything.
The most advanced process node on the market, defined by the size of the features on a chip, is due to reach 14 nanometers next year.
Actually, the "process node" hasn't meant anything for years now.
How did Mars form an atmosphere in the first place if it has no magnetic field to keep it from getting stripped away?
Water is the fuel, sunlight is merely a power source. The solar arrays could be replaced with whatever power source you want - RTG, fission reactor, Li-ion battery, etc.
39 days to Mars with ion propulsion? Show me your "calculation." DAWN took 9 months, I want to see how you got a 690% improvement without using a megawatt of power or technology less than TRL 7, and how much delta-v you expect the launch vehicle to contribute.
Ion thrusters don't depend on chemical reactions. Ionization is through colliding a high-energy electron with the propellant, and then the ionized propellant is accelerated.
Using hydrogen is pretty dumb because you're trying to generate thrust. F=ma. Hydrogen has low mass.
They've been testing this for awhile. AFF (Autonomous Formation Flight) from 2001 is the first project I know about. The challenge is in the guidance and control system - it must be able to keep the trailing aircraft within inches of the desired position (12 inches for AFF) and maintain position through maneuvers and disturbances.
Enforcement is the problem. When texting is banned, people put the phones down in their lap to text so that the cops can't see the phones up on top of the steering wheel while they're texting and watching the road.
One study disagrees: http://www.sciencedaily.com/releases/2012/04/120429085411.htm Phone up or down made no difference, at least with this sample of teenagers.
Where are you in LA? I've been in LA area the past 5 years. Live in West LA and I've gone to just about everywhere as far east as San Gabriel Valley. The only place I've had terrible T-mobile coverage is Palos Verdes, but my understanding is that all the carriers suck there since no one wants cell towers cheapening their property.
You're forgetting the purpose of a rocket: to put something useful into space. Getting a rocket and a bunch of fuel into space is worthless by itself. More fuel means less payload.
I agree with you about Finder, but for home/end of a line, just press CMD+Left/Right. This just an idiosyncrasy of the OS, like pressing CMD+Down/Up to navigate folders instead of Enter and...is there even a "up one folder level" shortcut in Windows?
Copyright was seen as necessary evil to protect investments into expensive R&D.
Those are patents, not copyright. Copyright is intended to help content creators profit from their work so they can make a living and create more content.
SEP has been in regular use for over a decade now...first EP-powered deep space mission was in 1998 (Deep Space 1), and just about every Earth-orbiting satellite relies on EP.
Anandtech mentions that the 520 went through a year of testing, so it should be much more reliable than other SF-2200 SSDs. Also fixed a BSOD issue in one of their systems, which was also using SF-2281.
It's not about what's good for the consumer, it's about what's good for non-Chinese economies. China did the same thing with rare earths – undercut all competitors and eventually produce more than 90% of the world's rare earth supply. Then they used that to control prices and where the refining and production takes place (hint: not anywhere overseas). They basically control the high-tech economy and wind turbine production (which need rare earth magnets). Who wants that for soloar panels too?
IMHO all of these products, including motors for hybrid vehicles, are too important to allow China to trivial blackmail the rest of the world at their pleasure. All that is needed is the US government to guarantee purchase at some set price and dozens of new mines would open overnight in the US.
Opening new mines or even just re-opening the old mine in Mountain Pass, CA, can't happen "overnight." It will take at least seven years to open a new mine (http://www.gao.gov/new.items/d10617r.pdf).
The first thing that needs to be understood is that nothing is simple in space. Space WANTS to kill everything, whether it freezes it, melts it, or simply irradiates it into useless bits of materials. Everything put into space is designed for specific thermal, radiation, power, propulsion, and communications requirements. Sending Magellan to Mercury instead of Venus would not have worked. Similarly, sending ISS to the Moon won't work. It was designed for the thermal and radiation environment in LEO. It wasn't designed with the power to support a bunch of Hall or ion thrusters powerful enough to move it anywhere – and no, chemical is not an option. Communications might still work, depending on how much bitrate you expect to get, but that'll be a big loss going from LEO to the moon.
As countries develop, birthrate goes down. More specifically, birthrate and family size trends down as women are educated and child mortality goes down. Not exactly starvation, but keeping poor nations poor is a problem, not a solution.
But I thought we were still using Intel 80386SX chips in NASA cause apparently radiation hardening takes decades, but yet a consumer grade phone is fine?
either someone is full of shit on the radiation hardening, or that's one fucking amazing phone!
An iPhone is also going to ISS. According to NASA, "[the iPhone] will be housed inside a small research platform built by NanoRacks," (http://www.nasa.gov/mission_pages/shuttle/behindscenes/whatsgoingup135.html) so presumably the Nexus phones are, too.