Slashdot Mirror


User: c0lo

c0lo's activity in the archive.

Stories
0
Comments
4,214
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 4,214

  1. Science moves forward on CERN: Neutrinos Respect Cosmic Speed Limit · · Score: 1

    The neutrinos obeyed the speed limit. Nothing to see here, move forward citizen scientist.

  2. Re:So mexico should build some space ports on Could Insurance Coverage Hobble Commercial Space Flights? · · Score: 1

    So mexico should build some space ports

    Why not Kenya (low population density) or Congo (launch over the ocean) - both with locations closer to equator? Avoiding 2.7 bills/shot in insurance would make this a reasonable investment.

  3. Re:Three truths on Could Insurance Coverage Hobble Commercial Space Flights? · · Score: 1

    3. Nothing, and I mean NOTHING, is a greater threat to a country's ability to achieve great things than its lawyers and those who would employ them to their own benefit without regard to the costs to us all.

    What about the lawyer of other countries? Especially patent lawyers (able to block your products based on its rounded corners?)

  4. Re:Why is the sky blue? on Grad Student Wins Alan Alda's Flame Challenge · · Score: 1

    And why blue is blue?

  5. Re:Would anyone else recommend GWT? on Ask Slashdot: Tips For Designing a Modern Web Application? · · Score: 1

    GWT is good if you want to create a RIA, when the presentation logic is so complex developing it in javascript is a nightmare, but without having to use Flash or silverlight. If the presentation is simple enough however, I would stick to HTML5 + jQuery. In fact the "simple enough" bar in that last statement is gradually pushed forward.

    As a rule of thumb I'd say if you have a lot of moving parts on the page and you are basically creating a desktop application inside the browser ala Google docs, then consider GWT. Otherwise it will do more harm than good.

    Haven't played with jQuery, but even so:

    1 GWT is able to handle simple cases. Nothing wrong with leaning another library, except the time you spend on the leaning curve to get productive (getting to know jQuery and, possible, setting your mind on "thinking in Javascript").

    2. Browser compatibility - still a nightmare. GWT seems to transpile to something that will run across the main browsers without getting your mind overheated

    3. the fact that you write your client code in a single programming language, but - more important - you get to debug that (browser) code using the same IDE you used and trace its running in no way differently than your server-side code.

  6. Re:Would anyone else recommend GWT? on Ask Slashdot: Tips For Designing a Modern Web Application? · · Score: 1

    GWT is decent if you are building a web application that will be doing one thing. If you are looking for a more broadscale application, then GWT doesn't hold up well.

    Huh? The fact that you can write code to run in browser (and use the client CPU/RAM) and let the server run only the "services" to get/build/process the data should point in the opposite direction - how did you reach the conclusion that "doesn't scale well"?

  7. Re:There's quite a few options out there, but... on Ask Slashdot: Tips For Designing a Modern Web Application? · · Score: 4, Informative

    If you're familiar with Java but not web development,...

    +

    In the long term, writing a view-only version as an Apple and/or Android app is on the radar

    +

    I have no experience with PHP and would like to stay in my Java comfort zone as much as possible, but want to use the right tool.

    In my opinion, give GWT a try. Why should make it exciting for you: the entirely dev cycle (this includes debug) is Java based - including the code in the "views" that will be shown in the browser (even if this code will be transpiled to javascript - a very compact one for the functionality it implements).

    Using GWT, the "presentation logic" is totally separated by the lower layers (in both "architectural" and "exploitation" senses): i.e. your business logic will implement only "services" type of functions, the "presentation logic" - in browser - will be in charge to render the data the way you see fit - no more server-side resources to be consumed by layouting the page, applying "data model basic consistency validation", etc - (oh, how I hated JSP at their time). Let the "client CPU" do a bit of this effort - if your application will be highly used, a bit from every client-side that takes some care about itself will get you some serious server-side savings.

    As I write, I'm digging into a piece of GWT that promises to take care of the integration with JPA entities, e.g. bringing Hibernate into the picture without the need of heaps of "plumbing code".

  8. Re:Gotcha! on 350-Year-Old Newton's Puzzle Solved By 16-Year-Old · · Score: 1

    In fact, if you multiply his equation through by u^2, then set u=0 you are left with g+alpha v^2=0. Similarly, setting v=0 you have g=const u^2 which is equivalent if const=-alpha and v=u. So it appears to not blow up.

    I'm not sure what it's really telling us though! v^2 is proportional to g? I think we need to know more about his notation.

    Tells you that the KE and PE go hand in hand?

  9. Re:experimentally demonstrated tractor beams on Bessel Beam 'Tractor Beam' Concept Theoretically Demonstrated · · Score: 1

    Optical tweezing had already a Nobel prize back in 1997.

  10. Re:Any experts out there? on Bessel Beam 'Tractor Beam' Concept Theoretically Demonstrated · · Score: 1

    Can anybody explain exactly what's going on here and why are the Bessel beams imparting force/energy on the objects toward the beam source?

    Thanx,

    myke

    Bessel beams.
    Optical tweezing

  11. Re:Priorities on Call For DOJ To Reopen Google Wi-Fi Spying Investigation · · Score: 1

    ... occur to you that these people are the problem they are a huge force of inertia on government policy and the reason that nothing every really changes between administrations ....

    Yes, minister.

  12. Re:Again copyright law abuse. on Fox Sues Dish Over "Auto Hop" Ad-Skipping Feature · · Score: 1

    doesn't the time shifting clause cover this?

    I don't know. Is the distributor allow to timeshift or only the end consumer?

  13. Re:Again copyright law abuse. on Fox Sues Dish Over "Auto Hop" Ad-Skipping Feature · · Score: 1

    as long as the recorder stores everything

    I don't see how it could be a violation of copyright to fail to copy certain portions of a work, or even to only selectively play back portions of a work.

    Depends on the license agreement between the producer/aggregator of the content (single or multiple pieces of work doesn't matter) and the distributor. Dish is a distributor, is is not?

    At best, this could be a violation of the contract between Dish and its content providers and advertisers. Moot to the point of this thread: it is a civil matter that has jack to do with copyright.

    Maybe... it all depends on the contract/rebroadcast license: if it's based on copyright laws, then it has to do with copyright laws. Otherwise, I agree with your assessment.

  14. Re:Again copyright law abuse. on Fox Sues Dish Over "Auto Hop" Ad-Skipping Feature · · Score: 3, Interesting

    Not watching commercials is NOT violation of copyright.

    Although...it may be a copyright violation to alter a content that you don't have the right on and was distributed by the others.

    To get around, I'd imagine that as long as the recorder stores everything (but allows the user to pick a watching mode in which the ads are skipped) should not be a copyright violation. It would be like a news agent selling a magazine, "enhanced" by himself with an extra list of bookmarks that allows the reader to skip over ads pages.

  15. Re:why so secretive? on FBI Quietly Forms Secretive Net-Surveillance Unit · · Score: 2
    Duh. I fail to understand why so many are tricked into focusing on "why so secretive" and distracted from why net surveillance at all

    It's like saying: "yeah, I have no problem in being spied on as long as I know that I might been under surveillance!" (and I'm saying this as one that was born and grew up under one of East European communist regimes, with their secret police present in the shadow. What good its to know that Big Brother is watching you if you can do nothing?)

  16. Re:Freak coincidence on MIT Creates Superhydrophobic Condiment Bottles · · Score: 1

    I dont think super glue will work.

    Why not? Superglue is not water based, hydrophobia might not help.

    Besides, the sprayed surface becomes super-hydrophobic as a matter of its surface structure.

  17. Re:Freak coincidence on MIT Creates Superhydrophobic Condiment Bottles · · Score: 1

    And curiously, a radio ad I hear a lot lately is starts off about the super-high-tech drains that can't clog.

    Can't clog? You mean even if I'm throwing a bucket load of superglue down the drain?

    Sure, just pour an equal volume of acetone down the drain. You can get acetone by the gallon at the hardware store. If you have plastic pipes, put your bucket under the sink first, in order to catch your acetone for future reuse.

    Won't work with polyethylene plastics.

  18. Re:how fast do you NEED to move? on "Part-Time" Scientists Aim To Build Autonomous Moon Rover · · Score: 1

    What about lunar dust? Run faster, and you throw more dust into the "air" (it's a vacuum of course) (ever seen the video of the previous Lunar rover?). the dust is electrostatically charged, and may stick to the rover, reducing the output of the solar panels.

    Actually, dust is what killed the soviet rover.

  19. Re:"Avg speed of 1 cm/sec" and a question on "Part-Time" Scientists Aim To Build Autonomous Moon Rover · · Score: 1

    Due to the size and mass restrictions, nuclear power was also not an option, and the size of the solar arrays was necessarily limited. Nevertheless, while I know you are not criticizing the two rovers, it must be stated: given the constraints under which they had to operate, they worked remarkably well, and lasted years beyond their planned 90-day lifespan. If ever there was a NASA success, Spirit and Opportunity are it.

    Indeed, I'm not criticizing. I just wonder what the energy budget the Moon rover will have. It seems that placing the rover on the Moon will have lower constraints then for the Mars case. A lower gravity allows for lower (less speedy) insertion orbits, not climbing against Sun's gravity well - it just means the rover may be heavier - hell, the soviet Lunokhod 2 weighted 840 kg. However there are some other constraints:
    - the Moon "night" is 14-15 days long - does the rover needs a heavier radioactive source to keep warm?
    - Moon doesn't have atmosphere, thus no chance of aerobraking during landing - would this bring some difficulties for the beach-ball landing as well?
    - It seems the dust on the Moon was what caused the death of Lunokhod, is this dust in any way more special than the one on Mars?

  20. "Avg speed of 1 cm/sec" and a question on "Part-Time" Scientists Aim To Build Autonomous Moon Rover · · Score: 4, Interesting
    Opportunity (the rover) has a ration of 560 W*h/day for everything it needs to do - and this includes moving its 180 kg.

    Granted, the insolation will be better on the Moon than on Mars (closer to the Sun), but... just how much power their GPU is going to require for computing the 2.5 D env data?

  21. Re:Freak coincidence on MIT Creates Superhydrophobic Condiment Bottles · · Score: 2

    Well, first, you'd have to visit every store in your city and clear out their entire inventory of those tiny, tiny tubes to get even half a bucket-worth of super glue.

    You reckon?

  22. Re:Freak coincidence on MIT Creates Superhydrophobic Condiment Bottles · · Score: 1

    And curiously, a radio ad I hear a lot lately is starts off about the super-high-tech drains that can't clog.

    Can't clog? You mean even if I'm throwing a bucket load of superglue down the drain?

  23. Re:How durable? on MIT Creates Superhydrophobic Condiment Bottles · · Score: 1

    This stuff should probably be shipped in double walled tanker trucks.. hate to see what it does when spilt on a roadway.

    Is hydrophobic synonym with frictionless?

    If not, price aside, then it might be even a good idea, as an improvement for the water draining capacity of the road.

  24. Re:Did whoever wrote the summary read the article? on Nanotech Solar Cell Minimizes Cost, Toxic Impact · · Score: 1

    It's important to note though, that if you can make twice as much panel area for less money, then you are being more efficient.

    The prices for PV panels are already low enough to start considering other factors. For instance: available area for PV panels installation - it starts to matter for "domestic solar energy producers" (my current situation now, having to decide what offer I should go with).

  25. Re:Kleptomania is a mental disease on SAP VP Arrested In False Barcode Scheme · · Score: 1

    Many people steal, but kleptomaniacs have a compulsion to steal independent of need. As this article illustrates, the root of kleptomania is a desire for revenge upon a world that the person feels has treated them unfairly.

    ...and, mark my words, being a VP at SAP is truly the most unfair treatment except Inquisition.