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Comment Re:Unbelievable... (Score 1) 207

From the original post in question:

... a lot of effort was put into highly optimized bresenham line algorithms, because traditional implementations implied a div operation per pixel, ...

Which is worded poorly enough to be taken to mean, "traditional bresenham implementations require a division operation at each pixel".

I also posit that the quoted post is wrong about the division instruction: DIV still takes a lot of cycles to execute*, that's just the nature of the maths involved. Of course modern processors will try to do some clever code reordering that may make slow instructions appear to be executing a lot quicker, but the instruction dependency chain does not always afford this opportunity.

* cf for example http://www.agner.org/optimize/instruction_tables.pdf

Government

Survey Says To UK — Repeal Laws of Thermodynamics 208

mostxlnt writes "As we noted, the new Tory UK government has launched a website asking its subjects which laws they'd most like repealed. There are proposals up for repeal of the Laws of Thermodynamics: Second, Third, and all (discussion thread on this one closed by a moderator). One comment on the Third [now apparently deleted] elucidated: 'Without the Third Law of Thermodynamics, it would be possible to build machines that would last forever and provide an endless source of cheap energy. thus solving both potential crises in energy supply as well as solving the greenhouse gas problem in one step... simples... eh?'"

Comment Re:Money (Score 1) 317

You can say "In a total war, nobody will be perceived as innocent" and that is sad enough, but to postulate that nobody is innocent in a total war is taking things quite a bit too far. Get a heart while you're still alive, bud.

Comment Re:Not just the space program... (Score 1) 371

Prisons are full of career criminals who are little more than animals, but we have to be nice to them so that when we let them out again they can continue their life of crime.

I'm shocked to see a statement so ignorant and full of contempt for your fellow human beings get a positive moderation score.

A sad day.

Comment Re:Levels of anonymity? (Score 1) 280

Fundamentally, the issue is very simple: Given some sort of identifier, and a series of properties about that identifier, if you have enough dimensions of detail, you end up narrowing down your sample so much that you end up with a population of one, that being the person the identifier "hides". It's just that simple.

We go through the same basic process to find information through a search engine -- we attempt to find ways to narrow down the data in such a way that the information we are looking for exist within a sufficiently limited set.

I'm sure we both have experience searching for relatively generic information, where the number of possible matches unrelated to our target is so great that the information is effectively unavailable. Anonymization is the same basic principle - genericize the data to the point that it is useful in aggregate, but valueless for targeting individual users, based on a preponderance of possible matches.

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