Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror

Comment: Re:7.7 mohs hardness? (Score 1) 247

by jolyonr (#49578241) Attached to: Breakthough Makes Transparent Aluminum Affordable

You're wrong in two different ways, which I kind of admire :)

Firstly, you have something that is between 7 and 8, so for arguments sake you call that '7 and a half' (this is regularly done).

Then you take another sample, and that scratches the '7 and a half' pieces, and not the 8, so it's between 7 and a half and 8. But that's a completely different scenario to arbitrarily assigning a '7.7'

There is another method of measuring hardness, the vicker's system which does indeed follow a linear scale, so you could potentially use the vicker's hardness of the specimens to determine an approximate decimal value for the hardness of your chosen sample. But that's completely stupid because the whole POINT of this is to show a relative hardness between two samples, ie to be able to measure it by scratching one piece against another. So my comment stands, the '7.7' value is pulled out of someone's ass and has no scientific merit.

The second problem is you then compare with software revision numbers... which are of course numbers pulled entirely out of someone's ass. And of course, version 5.9 is usually less than version 5.10 etc. so again you have no way of saying 'version 5.5 is about half way between version 5.0 and version 6.0 in features.'

Comment: 7.7 mohs hardness? (Score 1) 247

by jolyonr (#49574033) Attached to: Breakthough Makes Transparent Aluminum Affordable

The Mohs scale of hardness is a relative unitless scale comparing things to ten common minerals. There is no '7.7' on this scale. 7 is Quartz and 8 is Topaz. So all you can say with any accuracy is that it is between 7 and 8. Maybe it is closer to Topaz in hardness than Quartz, but even so, there's no way of calculating a '7.7' so they just pulled that number out of their ass...

Which makes me wonder how accurate the rest of what they say is.

Comment: People expecting their marketing for free (Score 5, Insightful) 258

by jolyonr (#47569781) Attached to: Is the App Store Broken?

Too many people want to get rich by selling apps and expect Apple to pay for the marketing of their apps for free on the App Store.

The App Store serves one purpose - not to promote your apps, but to make money for Apple.

If you want to go into business selling an app for iOS then you need to have some plan in place to market it. That doesn't mean sticking it on the App Store and hoping for the best.

If you can't afford to market your app (either by paying for advertising somewhere or just physically spending your own time promoting it) then you really shouldn't waste money or time to develop it either.

Only through hard work and perseverance can one truly suffer.

Working...