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Comment Re:This is why we have NaN (Score 1) 1067 1067

Well, the limit of 1/x as x approaches 0 from the positive side is +Inf, but the corresponding limit as x approaches 0 from the negative side is -Inf. Still no way to choose just one as "correct". Thus by various definitions, 0/0 = NaN, indicated with either a floating exception program termination, or a signalling or non-signalling IEEE NaN depending on the environment and if your code has adjusted various FP environment options.

Comment I Disagree with the Summary (Score 4, Interesting) 342 342

Looking at the video, it appears the booster does not come close to ever having anywhere near a true vertical orientation, and this attempt was not, in fact, "incredibly close to success". Granted, it came closer than ever in history to achieving the goal, but the thruster appeared to not have enough thrust to push the rocket to a vertical position once the booster touched down on the barge. I hope Space-X has a successful next test! The world needs a dose of rockets landing on large flames in the style of those old campy movies.

Comment Re:Too many pixels = slooooooow (Score 4, Insightful) 263 263

8k is just fetishism.

And yet an 8k monitor would be very useful for viewing the complete image of many DSLR cameras without scaling or subsetting, with room for controls and menu bars or panels to be also visible. I'd probably get one for this reason.

Comment SBC6120 is real PDP-8 style hardware (Score 3, Interesting) 92 92

The SBC6120 uses a Harris 6120 CPU chip which is a PDP-8/e-like microprocessor. It has a companion FP6120 front panel with switches and lights, which is a scaled down version of an older modle rack mount PDP-8 front panel. You built them from kits, loads of fun for those who like that sort of thing. Mine has a CF card for the hard drives (a whole whopping 2 MB each under OS/8!). You may be able to find an unbuilt kit, as the maker of the kit, Spare TIme Gizmos, will not be making any new ones going forward.

Comment Not 3D chemical printing (Score 2) 132 132

From the description in the articles, it appears to function more like a DNA assembly. They start with some basic building blocks with certain chemical groups attached, and react them together to build molecules, freeing those attached groups. It does not appear to be adding individual atoms to individual molecules.

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