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Comment: Enhancing users shopping experience (Score 2) 266

by Rudisaurus (#49095945) Attached to: Lenovo To Wipe Superfish Off PCs

"When asked whether his company vets the software they pre-install on their machines, [Lenovo CTO Peter Hortensius] said, "Yes, we do. Obviously in this case we didn't do enough. The intent of loading this tool was to help enhance our users’ shopping experience. The feedback from users was that it wasn’t useful, and that’s why we turned it off. Our reputation is everything and our products are ultimately how we have our reputation."

Far too little and far, far too late!

If Superfish was merely not "useful", some people would carp about it and most would just ignore it. It is far more dangerous than that because it deliberately behaves in a way that undermines the integrity of the trust system on which internet is based and so jeopardizes the security of the user. To claim that this was done in order to "enhance" the user's experience is cynical beyond belief. I'm certain Hortensius is right when he says that the software was vetted at Lenovo. I'm also quite sure that it performed precisely the way it was intended to. But who on earth thought that was a good idea?

There has to be a price to pay for this major failure of judgement and I can only hope that it is both hefty and that it impacts those at Lenovo who were ultimately responsible for it, Hortensius among them.

Comment: Cosmic Microwave Background Radiation? (Score 1) 288

by Rudisaurus (#49031271) Attached to: Quantum Equation Suggests Universe Had No Beginning
How does the cosmic background radiation -- Penzias/Wilson's discovery -- fit in with this new cosmological theory? I thought that was supposed to be significant supporting evidence for the Big Bang? Neither TFA nor TOFP says anything about it (although there is some speculation in the commentary which follows TFN).

Comment: Re:Actually it's both. (Score 2) 360

Great explanation! Completely agree.

In fact, you could take it a step further and apply Bernoulli's equation to the fluid in the system. The difference in pressure between the source reservoir and the destination reservoir is exactly offset by the effective pressure loss due to friction between the flowing liquid and the tube wall.

The difference in pressure between the source reservoir and the apex will include part of this friction pressure loss (proportional to the length of the tube from the source to the apex relative to the overall length) + reduction in pressure due to the velocity of the fluid in motion (static liquid is at a higher pressure than liquid in communication with it at the same elevation but in motion -- the principle behind the pitot-static tube).

This is why flow through the siphon can be regulated by raising or lowering the apex of the tube. Make it higher, the total friction pressure loss is increased and the velocity must decrease to offset that loss. At some point, the tube is sufficiently long that the flow is slowed to a standstill.

Comment: Business is ... axes? or split firewood? (Score 1) 217

by Rudisaurus (#46811467) Attached to: Reinventing the Axe
I watched a few promotional videos for the Vipukirven on YouTube. People lined up at trade shows to try out this new axe, and the promo guys were kept busy heaping the resulting split firewood onto a huge pile. It occurred to me that touring a "new axe" around to trade shows and getting passers-by to split enormous piles of wood for you for free is a great business model for a firewood vendor ...

Of course, if you can sell the occasional axe (for US$200+), so much the better!

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