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Comment: trial and error (Score 1) 248

by multi io (#48833547) Attached to: SpaceX Landing Attempt Video Released
It seems SpaceX is relying on a trial-and-error strategy during the development of the soft landing capability of their booster much more than they (or others in the industry) do for other components or capabilities of space launch or other aeronautical systems. I don't see (unmanned) rockets or drones being developed in this fashion. Even large rockets that can achieve orbit will normally be modeled, simulated and tested component-wise to the point that they will usually work at the first or second attempt when the entire system is integrated and tested for the first time. So why is this so different here? Is it just cheaper? Or is it actually that much harder to make the rocket land softly on its own exhaust jet than to make it go into orbit?

Comment: Re:what the hell could this possibly mean (Score 1) 104

by multi io (#48155247) Attached to: Microsoft Partners With Docker

Docker containers are like VM's but smaller. I think what it means is that a Windows server / VM will be able to run dozens-hundreds of Windows micro-services inside a Docker for Windows infrastructure. Or basically once finished you as a developer can now write Windows apps that don't need to install and will run on any Windows, no more version dependencies! Just like Docker is doing for Linux today.

Yeah, but wouldn't it have to be rewritten from scratch on Windows? AFAIK there is no chroot, cgroups or anything like that in Windows (I guess there might be equivalents). And I have no idea what you would do about the registry blob in this scenario.

Comment: Re:He tried patenting it... (Score 1) 986

If all it is, is a battery, then by itself it would be worth almost as much as cold fusion, as it can store and produce 600+ horsepower for an hour (1.5MW hours).

It doesn't store it, it has a power supply (even officially). And it emits the 1.5MWh over a period of 32 days, not one hour. And oh yeah, it never seems to work unless Rossi is present to "supervise" the thing.

Comment: Re:Isn't "Cutting the Wind" cheating? (Score 1) 254

by multi io (#48119611) Attached to: What Will It Take To Run a 2-Hour Marathon?

Isn't "Cutting the Wind" cheating?

Isn't anything is cheating or not cheating relative to a constant set of rules that are applied consistently? The current set of rules happens to allow wind-cutting and refreshment points along the track, but not 1000m downhill slopes or using a motorcycle.

Comment: show stopper (Score 4, Informative) 126

by multi io (#47940989) Attached to: Next Android To Enable Local Encryption By Default Too, Says Google
The device encryption feature is apparently designed to always use the lock screen password. So you're forced to have such a password, which you have to enter every time the device comes out of sleep mode, AND (much worse) it breaks essential apps like SkipLock that want to disable the lock screen under certain conditions, e.g. when you're within range of a known WiFi network, thereby relieving you of the need to enter your PIN about 5,000 times a day while you're sitting on your couch at home.

See also https://code.google.com/p/andr...

Unfortunately, this is a total show stopper for full device encryption.

Comment: Re:Sounds challenging. (Score 1) 35

by multi io (#47913621) Attached to: European Space Agency Picks Site For First Comet Landing In November

The probe is in orbit around the comet, and a quite peculiar orbit too. So regardless of what the comet does, from the reference point of the probe, it is "rotating".

I don't think so. The comet may not be rotating on its own. Which would mean that all patches of its surface rest in an inertial frame (at least if you ignore the rotation around the sun -- which shouldn't have much influence during the short timespan of a landing). If that were the case, it would make the landing easier because the lander's velocity relative to the surface would stay constant during unpowered flight phases.

Comment: Re:What if you tilt your head in headphones? (Score 1) 89

by multi io (#47794699) Attached to: RAYA: Real-time Audio Engine Simulation In Quake

I never understood those head trackers. I mean, if I have a screen in front of me and turn my head to the right, then the display may very well change but I'm now looking to the right so won't see it (or need to look out of the corner of my eye). If instead I have a bank of monitors, so that I could see any adapted view - it wouldn't need to change the display!

http://youtu.be/Jd3-eiid-Uw

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