larrydag

52 ms·

511.
by larrydag 13y ago
Apparently the toroidal ring has some property that allows it to reduce the energy requirements. "and in particular a ring around it that is key to its propulsion system — in a way that he believes will greatly reduce the energy requir
512.
by larrydag 13y ago
That's not true. Freight consumers care a lot about speed. Think of it like a triangle and each corner is cost, reliability, and time. Each one pulls on the other as a decision process in the supply chain.
513.
by larrydag 13y ago
Just an aside. The Musk Hyperloop is not a pneumatic tube. The pnuematics in Musk's Hyperloop is to reduce friction and provide stability. It's not for propulsion. Musk's Hyperloop is more akin to an air hockey table.
514.
by larrydag 13y ago
Since Musk said that it was a people transportation concept everyone immediately jumped on that bandwagon. The hyperloop could be a concept that disrupts the cargo train market. I could see GE taking a look at this concept with the idea o
515.
by larrydag 13y ago
We studied the physics of bicycles (angular momentum if I recall) in engineering school.
516.
by larrydag 13y ago
The construction cost alone for building a tunnel underground would be in the several billion dollars. I don't think it will be underground. At least not most of it.
517.
by larrydag 13y ago
Here is something to look at 2013 Tuition: $12,500 Subsidized: 30% 2013 Total: $17,857 1981 Tuition: $687 Subsidized: 90% 1981 Total: $6870 2013 Dollars: $17,690 (at 3% inflation) So the argument is not the cost of education as that ha
518.
by larrydag 13y ago
Or from Hacker News sources. http://hackershelf.com/
519.
by larrydag 13y ago
I looks like a wool blanket could help (R value around 4) http://en.wikipedia.org/wiki/Wool_insulation
520.
by larrydag 13y ago
I'm curious what the affects of the Sun's radiation would have with people on Mercury. It might not be conducive to vegetation or habitation even if it is underground.
521.
by larrydag 13y ago
I'm a bit confused by this article. Is it comparing computers or comparing algorithms? CPLEX is software to run linear and mixed-integer optimization algorithms. CPLEX is not a computer. Perhaps I misunderstood the article. Could you n
522.
The Liberator Pistol files removed by US DoD Trade Controls(defcad.org)
13 points by larrydag 13y ago|1 comments
523.
by larrydag 13y ago
I think it is about making money but you are right about connecting with fans. Its an added layer above the funding.
524.
by larrydag 13y ago
Good question. The Engineering profession holds certain code of ethics for the public at large. For instance when you step into a high-rise building, board a cruise ship, or travel across highways they are required to have rigorous testin
525.
by larrydag 13y ago
As a licensed Professional Engineer I worry about the state of engineering in the US. I feel the word "engineer" is diluted to mean any job that requires technical know-how. Yet there are important ethical considerations if one practices
526.
by larrydag 13y ago
Dallas Makerspace has a good list of embedded Linux hardware. https://dallasmakerspace.org/wiki/Embedded_Linux_Computers
527.
by larrydag 14y ago
Is it me or is it just a metallic hot air balloon?
528.
Cyprus crisis boosts Bitcoin(cnbc.com)
3 points by larrydag 14y ago|0 comments
529.
by larrydag 14y ago
There are a lot more ships that have nuclear reactors than just carriers and subs. http://en.wikipedia.org/wiki/List_of_United_States_Naval_rea...
530.
by larrydag 14y ago
From reading about the SpaceX program there are remarkably very little left of the Apollo program engines. Having a real model even in disarray would be a useful study.
531.
by larrydag 14y ago
For anyone wanting to get up close and personal to an F-1 Engine visit the Infinity Museum at the Stennis Space Center in Mississippi. They sit outside right at the entrance. It is truly a remarkable sight especially when you sit inside o
532.
by larrydag 14y ago
What statistical or data science tools do you use at Sift Science?
533.
by larrydag 14y ago
I think there could be value for a customer if the product is presented differently. For instance, offer free shipping, give personal reviews, offer warranty or guarantee. Its about differentiation in the market. It really is a study of
534.
by larrydag 14y ago
I was thinking the exact same thing. I was envisioning a "pod" system that you could have about 10 rows which could hold about 40 to 80 passengers each. Each pod would be a cylinder that could be delivered to the aircraft on the tarmac up
535.
by larrydag 14y ago
So basically its just a QuakeCon?
536.
by larrydag 14y ago
I haven't read up on the whole story but I did not see anywhere that Blue was limited in their rules of engagement. In my point of view Red showed a severe weakness in Blue's supposed superior electronic warfare capability.
537.
by larrydag 14y ago
Yet this action does seem like collusion which was the oringal point. I didn't know transactions could be excluded as well. Who's to say that in the future miners could collude against certain merchants?
538.
by larrydag 14y ago
I would also like to postulate the element of surprise. Sauron would never expect a weak, feeble creature like a Hobbit to be an adversary. But mostly I agree with your points.
539.
by larrydag 14y ago
My 9 year old finished it in a weekend. He was hooked and considered it a fun puzzle. My only problem was trying to keep the energy going and challenge him more.
540.
by larrydag 14y ago
Awesome article. I love teaching math concepts especially to kids. This is something I will have to remember. Here is a smartphone/tablet app that teaches kids algebra. http://dragonboxapp.com/

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