crocal

22 ms·

1. 181.▲
   by crocal 8y ago

   The release of door interlock used to be as you described, but now in Europe train stop is controlled prior to releasing it. The delay you note is generally tied to the reaction time of the ATP computer in charge of authorizing doors openin
2. 182.▲
   by crocal 8y ago

   MTA is doing this. It’s the basis of Communication Based Train Control.
3. 183.▲
   by crocal 8y ago

   It is hard because it must be vitally accurate. Screw it up and you end up with collision hazards. The number of dimensions is not the problem. The safety is.
4. 184.▲
   Tesla « killed by its robots »(businessinsider.fr)

   2 points by crocal 9y ago|1 comments
5. 185.▲
   by crocal 9y ago

   I don’t think Netflix customers nor Netflix cares. The competition is a side show to the real purpose of the festival, that is the professional event where deals and contacts get made.
6. 186.▲
   by crocal 9y ago

   Are we really back in 1929? Seems like it [1]. [1] https://en.m.wikipedia.org/wiki/Smoot–Hawley_Tariff_Act
7. 187.▲
   by crocal 9y ago

   I am drowning in demand right now and it is not a pleasant feeling.
8. 188.▲
   by crocal 9y ago

   Let’s do this.
9. 189.▲
   by crocal 9y ago

   Yes. There is this company [1] trying to use a similar concept (ejectors) to build a « motorbike hovercraft ». I haven’t heard about them for a while. They have patents on the concept [2] [1] www.aerofex.com [2] http://www.google
10. 190.▲
    by crocal 9y ago

    Just curious. They did not put solar panels? Too bad... :D
11. 191.▲
    by crocal 9y ago

    I am stuck in the worst traffic jam in Paris since 10 years. Bah. Who cares? :D That was insane!
12. 192.▲
    by crocal 9y ago

    You are misinformed. They do get into that. Big, big time.
13. 193.▲
    by crocal 9y ago

    This is a very important and valid point you are making. "Invisible hands" zealots are at the heart of the problem. Unregulated markets can and do screw up. This fact has been demonstrated and accepted by most economists now [1].
14. 194.▲
    by crocal 9y ago

    This is worth upvoting AND repeating because many could think otherwise. US Subway has no funding issue. It is a pure productivity issue.
15. 195.▲
    by crocal 9y ago

    Maintenance is the main reason. If you don't get into the nitty-gritty you cannot achieve the amazing feat of keeping a system up and running 30 years passed its design lifetime
16. 196.▲
    by crocal 9y ago

    I have spent more than a decade working with US colleagues in this sector. Overall, three things come at a disadvantage for US that explains overall this puzzling productivity problem. First, management. I don’t exactly know where it comes
17. 197.▲
    by crocal 9y ago

    I confirm this actually works surprisingly well.
18. 198.▲
    by crocal 9y ago

    (Sorry, I can’t resist) ... Is it vulnerable to Meltdown and Spectre?
19. 199.▲
    by crocal 9y ago

    The article is poorly written but your comment is very clear. This looks totally fascinating. Is there some kind of introductory book you would recommend (graduate level)? One burning question that I would like to ask you is if computationa
20. 200.▲
    by crocal 9y ago

    And don’t forget to check the bogus site. A “Maritime company strategically located in Mongolia”...
21. 201.▲
    by crocal 9y ago

    Yeah but not all things are like surgery. Often, « A good violent attack now is better than a perfect one next week » (George S. Patton)
22. 202.▲
    by crocal 9y ago

    I have to disagree slightly on the paragraph about dates (#32). Engineers leaders cannot dismiss dates as one of the metric of their performances. The metric is not the goal nor the means in itself, though. In my view, entropic organization
23. 203.▲
    by crocal 9y ago

    Subways will remain in dense city centers because they offer capacity that cannot be matched with buses. Driver or no driver is irrelevant. Your argument probably will hold true for regional trains and high speed trains, though. The travel
24. 204.▲
    by crocal 9y ago

    Overlaying signalling systems is a complex issue for 2 reasons. First, you have limited track and train access because the train is running at capacity. Second, you can actually create unsafe situations by combining two systems that are act
25. 205.▲
    New York subway 1M$ innovation challenge finalists announced(geniustransitchallenge.ny.gov)

    1 points by crocal 9y ago|0 comments
26. 206.▲
    by crocal 9y ago

    Seltrac will not be accepted by MTA. They have their own CBTC specifications and Thales (seltrac supplier) is engaged in a large program to create a compliant product.
27. 207.▲
    by crocal 9y ago

    No, it is not. Plenty of examples around the world, and it generally works better. Copenhagen and Hong-Kong come to mind.
28. 208.▲
    by crocal 9y ago

    The problem is that these systems produce business data that has to be a analyzed and used (think maintenance planning). So it must at least make it somehow to the office network. This is where the issue finds its root because once you crea
29. 209.▲
    by crocal 9y ago

    Telemetry is encrypted end-to-end, using proprietary stacks, networks and protocols. Very hard to exploit. Not impossible but would require a lot of insider knowledge to make it practical.
30. 210.▲
    by crocal 9y ago

    I am ready to bet that this was not supposed to be connected to Internet, but it was just more convenient to use this « workstation » for multiple use, and so hook it up to the company office network and automation network. Cyber security