Hacker Newsnew | past | comments | ask | show | jobs | submit | alan's commentslogin

Static a/b testing?


7 years ago I tried to start a project to allow customers to pay through the ad networks. IE rather than seeing ads, you'd see something saying how much you were providing to the web page owner. I've so far been unable to actually build it though.


Advertisers want more scale; consumers want no ads. You are in the middle to please no one.


I buy .m4a files from Apple and download them, then copy them from my laptop to my Android Phone. At this point they're so disconnected from the Apple infrastructure, I don't see any way they could pull it out from under me.


There are certainly ways to do it and we as the technical elite have all the skill sets required to do so but for the majority of users on these platforms who don't want to or aren't technically capable, it's a long term rental.

The file method also means you are locked into a format that may go the way of the dodo in 5 years.

There is no way to buy a license and stream forever and media in the digital form is getting less and less sticky. Things are more likely to disappear forever or be modified from the original format. At the same time, physical copies of media are rapidly no longer being made.

- Try digitally purchasing a Weinstein movie - Episodes that are banned and gone forever from TV shows

The utopia of easily accessible digital archives of all media are becoming less and less of a reality. Having to maintain your own server and backup infrastructure to manage your digital media is kind of a step backwards from physical media and while it may be a hobby it's not a wide ranging solution.


Yes, and when I bought CDs back in the 90s I didn't really expect to be listening to them 25 years later. My tastes change over time.

On the other hand I'm a little confused what you mean by the format going away in 5 years. The format is sufficiently open that anyone can write a player for it (in theory). Unless I lose all copies of the files, there shouldn't be any reason it won't continue to exist as long as I like listening to it.


It's not as applicable to music but I have DVD/Blueray rips from 10 years ago that look like dogshit now that would necessitate a re-rip from original. If you download it and it's later removed from from that platform now you have no access to the original and are stuck with your lower quality copy. If you are ripping it, you need to keep all the original physical media which kinda defeats the purpose.

The promise of digital media was permanent access to a library that grew and updated with the technology. If I'm streaming a show I don't need to have 720, 4k, ultrawide versions, that's taken care of. New formats are added as they are developed.


So, maybe Apple users should buy their music from Google Play store. Or, better yet, buy them from a third party (non-device platform) and play them on whatever platform they choose.


Based on the title I thought this was about people who created and killed programming languages. I was sorely disappointed.


I think the server would be able to encrypt with the user's public key, that way they wouldn't be able to read it. They'd have to send the encrypted data to the client to be decrypted with the private key there


Duff's device does not do memcpy. It's writing all the elements of a string to the same location in memory, where there's a port.


I never figured out why the cobalt has to come from the Congo. There are cobalt mines in North America that are sitting idle. https://en.wikipedia.org/wiki/Cobalt,_Ontario


It's cheaper when you don't need to follow labor and environmental regulations.


Bingo, and when it becomes too expensive there, you just do your typical political corruption/bribery dance and get the rules to change here so you can continue to profit from environmental destruction.


Besides, warlords often want lots of Nickel and other metals for projects. The Cobalt is "waste product" from what they were going to be mining for in the first place.


I'm suddenly imagining a hydrogen balloon-plane at take off that uses up the hydrogen in the balloon as it flies, until the balloon has been fully reeled back into the plane and it lands on a runway like a normal plane, with reserve hydrogen in its wing-tanks.


If you time it right, it just slowly drifts to the ground and lands vertically with a slight jolt.


Hmm, could we use interactions with the Earth's magnetic field for thrust when in LEO? With the Sun's magnetic field? It would be slow going.


Yes, sort of, but that’s mainly useful for torque rather than thrust as thrust relies on (if I’m getting this right) field gradients rather than absolute field strength. It’s not nothing, but it might as well be.

I back-of-enveloped a launch system with a very big magnet on the ground, supplying a much steeper gradient to push against, and it was still crazy expensive.

(I wonder if it would be useful for skyhooks?)


this is suggested frequently in these threads. it is already used in the very limited application where it is useful.

https://en.wikipedia.org/wiki/Magnetorquer

"It is also impossible to control attitude in all three axes even if the full three coils are used, because the torque can be generated only perpendicular to the Earth's magnetic field vector."

the non-earth orbiting mission i worked on didn't have any; it used little thrusters to desaturate its reaction wheels.


Yes there are various forms of electromagnetic drives that use the earths magnetic field for small tasks like rotation and (maybe) station keeping. There are a few types, some which use propellant, and some that do not. More info here: https://en.m.wikipedia.org/wiki/Electrically_powered_spacecr...


Yes, I remember reading about people using this to deorbit satellites... though I can't find the link right now.


Yes, satellites already do this.


We might be able to start using this as a way to specify planets, rather than the arbitrary number-by-discovery. Try StarName(with catalog info)#log(approximate radius of orbit)

Earth would we Sol#0 Kepler-90#-1.3, Kepler-90#-1.1, out to Kepler-90#0 for the outermost one on his graph.

That way, finding a new planet doesn't require either renumbering to specify where the planet is relative to the star. (BTW, I'm not real happy about using AU as the base measurement. It might be better to use Megameters since you're less likely to end up with negative log)


What would you do for highly elliptical orbits?


Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: