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User: sahonen

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  1. Re:Seems like a tremendous waste on NASA Considers Apollo-Era F1 Engine For Space Launch System · · Score: 1

    No, the point is that the Saturn V was expected to get a CSM and a LEM sitting on top of an S-IVB into LEO. The S-IVB was expected to get the CSM and LEM to the moon. You can replace the S-IVB and everything above it with whatever the fuck you want and the lower stages don't give a shit because it's just mass to them. The reason the Saturn V had such high specifications is because everything you need to get three astronauts on a lunar trajectory is *really fucking heavy*. If you replaced the astronauts, fuel, and other equipment required to go all the way to the moon with something else of equal mass, the Saturn V could put that into LEO just as easily as it sent astronauts to the moon.

    The nature of rocketry is such that a very light thing in a very high orbit tends to start out as a very heavy thing in a lower orbit. From the perspective of the lower stages of your rocket, a heavy thing in a low orbit is just a heavy thing that needs to be put into low orbit, regardless of whether it eventually ends up burning a bunch of fuel to put itself in a higher orbit, making itself lighter in the process, or if it just sits in that low orbit forever.

  2. Re:Seems like a tremendous waste on NASA Considers Apollo-Era F1 Engine For Space Launch System · · Score: 3, Informative

    LEO is on the way to the moon. The Saturn V delivered to LEO a payload consisting of the Command and Service Module, the Lunar Module, and a booster with enough fuel to put all of the above on a lunar trajectory. You could replace all of this with any arbitrary payload of equal weight and the Saturn V would be able to put it into LEO.

  3. Re:Seems like a tremendous waste on NASA Considers Apollo-Era F1 Engine For Space Launch System · · Score: 5, Insightful

    Saturn V wasn't used to boost large payloads to LEO

    On a lunar mission, the Saturn V would put the Command and Service Module, the Lunar Module, and a booster with enough fuel to put them both on a lunar trajectory, into LEO. That's a pretty damn large payload, the largest payload to LEO of any single vehicle ever produced. The fact that the payload eventually boosted itself the rest of the way to the moon isn't relevant to the vehicle's ability to put mass into LEO.

    It is the nature of rocketry that any small mass in a high orbit will tend to get there by going through a period in which it is a large mass in a lower orbit. In a staged rocket, it is useful to think of each stage as its own vehicle, with all of the stages above it as its payload which it is capable of delivering to a certain point.

  4. Re:Inertia on Is It Time To End Our Love Affair With the QWERTY Keyboard? · · Score: 1

    You mean this thing? It feels like shit to type on, like a laptop keyboard.

  5. Re:Inertia on Is It Time To End Our Love Affair With the QWERTY Keyboard? · · Score: 1

    It's even worse than that... People don't know what a good keyboard is. People *seek out* Apple's craptacular desktop keyboard (which is basically just a laptop keyboard, mushy feel, flat keytops and all).

  6. Re:I read this on Virgin Galactic's Suborbital Spacecraft Gets FAA Blessing · · Score: 1

    I'd be willing to bet that SpaceX will put anything into orbit that you ask them to, as long as you've got the paperwork in order. Satellites? Check. ISS cargo and crew? Check. Space tourists? Why not?

  7. Re:To unload more than 1,000 pounds of cargo on Astronauts Open Dragon Capsule Hatch · · Score: 1

    Think of it this way: It's hard to push a car, even though there is very little friction in its wheels. Zero gravity doesn't mean zero mass, it just means you don't have to counter gravity.

  8. Re:Well, if they're going to generalize, I am too on Are Porn and Video Games Ruining a Generation? · · Score: 1

    Is it too much to ask, though, that women feel it socially acceptable to ask men out? Gender equality goes both ways. I'm tired of finding out after it's too late that someone was actually into me, and I find it crass to ask out every woman I meet in the hopes of scoring a date.

  9. Re:Awesome but... on SpaceX's Falcon 9 Successfully Reaches Orbit · · Score: 1

    Perhaps one day when we have more experience we will be willing to launch a vehicle directly into its target orbit - One hour from the launch pad to being in sight of the ISS should certainly be possible. However, in this circumstance, caution is the ruler of the day. This will be SpaceX's first ever attempt at an orbital rendezvous. There's nothing on board that is using consumables to survive, there's plenty of time to slow down and get things right while remotely piloting a never-before-flown spacecraft into an incredibly expensive space station with several people on board.

  10. Re:Worthless gimmick with no audible benefits on Dolby's TrueHD 96K Upsampling To Improve Sound On Blu-Rays · · Score: 1

    Modern DSP techniques can implement a brick wall filter with a phase response anywhere from linear phase (equal pre and post ringing) and minimum phase (100% post-ringing). You can even do maximum phase (100% pre-ringing) if you're crazy.

  11. Re:who records 'expensive movies' at 48k? on Dolby's TrueHD 96K Upsampling To Improve Sound On Blu-Rays · · Score: 1

    > even home recording is laughed at (technically) if you are not using 24/96

    This is mostly home recordists one-upping each other. Actual professionals in the audio industry, especially people working on gigantic projects like movies where halving your DSP/CPU/HDD needs is a direct benefit of 48k over 96k, recognize that there are very very few actual audible benefits to 96k over 48k.

  12. Re:You cant hear it anyway. on Dolby's TrueHD 96K Upsampling To Improve Sound On Blu-Rays · · Score: 1

    PCM audio was originally recorded on video tape, and you needed to be able to record it in both PAL and NTSC standards. So the fact that the number is highly composite is largely a consequence of having to be divisible by both 50 and 60. More here: http://en.wikipedia.org/wiki/44.1_kHz

  13. Re:You cant hear it anyway. on Dolby's TrueHD 96K Upsampling To Improve Sound On Blu-Rays · · Score: 1

    Actually, modern delta-sigma A/D converters are capable of near-brickwall lowpass performance at nyquist.

  14. Worthless gimmick with no audible benefits on Dolby's TrueHD 96K Upsampling To Improve Sound On Blu-Rays · · Score: 5, Insightful

    Dumb, dumb, dumb. An ideal sample rate upconversion results in something that *is* identical to the source. Mathematically. It's like re-encoding a 64kbps MP3 to 192kbps. If anything you are going to *lose* quality due to inherent errors in the process.

  15. Re:huh on Mastering Engineer Explains Types of Compression, Effects On Today's Music · · Score: 3, Insightful

    What makes you think that whatever you're hearing has anything to do with that one specific variable (the sample rate) and nothing to do with any of the millions of other other variables (microphone selection and placement, preamps, mixers, A/D converters, processing, your D/A converter, amplifier and speaker system) inherent to the process of recorded music?

    Typically, when a single person experiences reality in a way that the majority of people don't, we consider them delusional, yes.

    If you want to not be considered delusional, pass a double-blind ABX test where A is a direct feed from an analog signal source and B is the same source being run through an A/D and D/A conversion at 44.1/16bit.

  16. Re:jury trials cost more money on How To Crash the US Justice System: Demand a Trial · · Score: 1

    I know 99%ers who are anarchists and I know 99%ers who are communists... You're ignoring the over-arching theme of the movement, which is that the type of concentrated power we have in our political system, where folks with money can de-facto buy laws in their favor, is unjust. Just because folks disagree on the exact way in which it should be reformed doesn't mean that the idea that it should be reformed is invalid.

  17. Re:Attach a solar sail on What To Do About an Asteroid That Has a 1 In 625 Chance of Hitting Us In 2040? · · Score: 1

    Given the fact that a significant portion of the human race can't even agree about providing a national infrastructure for healing sick people without placing them into massive personal debt, I have absolutely no faith that our civilization will ever be able to agree to the kind of coordinated worldwide effort that would be required to colonize space. The human race *will* go extinct, and personally, I'm not even sure that that's a such a bad thing.

  18. Re:Design flaw? on Raspberry Pi Beta Boards Unveiled · · Score: 0

    You can't automate soldered-through component assembly. SMD can be automated, and is therefore vastly cheaper to do. That's the attraction.

  19. Re:What about frame rates? on Filmmakers Reviving Sci-fi By Going Old School · · Score: 1

    American TV has been 60hz since it was invented, even when interlacing meant that the "complete" frame was only refreshed 30 times a second, each interlaced field is a distinct temporal sample, giving 60Hz motion. The new 720p standard (used by FOX and ABC networks over the air, plus FSN, ESPN, and many others over cable/satellite) is 60Hz progressive, and 1080 is 60hz interlaced.

  20. Re:Military Service on South Korea Blocks Late-Night Online Gaming for Adolescents · · Score: 3, Insightful

    Put away the pitchfork, he was talking about the mandatory military service in South Korea, he was not expressing the opinion that military service should be mandatory.

  21. Re:And there was much rejoicing.... on South Korea Blocks Late-Night Online Gaming for Adolescents · · Score: 4, Informative

    In the recent MLG, there were 4 foreigners in the top 8... Two Americans, a Canadian and a Swede. The Swede made it to the final, only to be defeated by a 16-year-old South Korean kid. It was quite the tournament.

  22. Re:Another idea on South Korea Blocks Late-Night Online Gaming for Adolescents · · Score: 5, Insightful

    If you don't think playing games is mentally exerting, you're not playing the right games. Starcraft in particular is one of the most popular games in South Korea, and is frequently compared to chess.

  23. Re:all good technology kills jobs on The Rise of Robotic Labor · · Score: 1

    Exactly what steps is an adult supposed to take to go from being a toll booth operator to being a robotics engineer? Half the population is below median intelligence, and I want you to think for a moment about what median intelligence is, and imagine half the entire Earth's population being below that. A significant number of people have only their muscles and their ability to follow instructions to contribute to the world, and as long as the distribution of intelligence doesn't change, it will be that way for the foreseeable future. You automate their jobs away, they're not becoming fucking robot designers or computer programmers, they're becoming homeless.

  24. Re:Long term goals on The Rise of Robotic Labor · · Score: 1

    Because people who are working jobs that can be replaced by robots are *totally* smart enough to design robots.

  25. Re:Colors on New Laser Data Transfer Rate Record Set At 26 Tbps · · Score: 1

    The refractive index is the ratio of the difference in speed between light in a medium and light in a vacuum. If a material has a different index of refraction at different wavelengths, then by definition the light is traveling at a different speed at different wavelengths in that material.