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Comment: Re: Not just Reno (Score 1) 438

by compro01 (#47900385) Attached to: If Tesla Can Run Its Gigafactory On 100% Renewables, Why Can't Others?

its just a simple idea I have always considered; loading electrical energy into physical potential energy by way of working against gravity. Maybe, instead, just run a big heavy chunk of metal up a notched pole? Then release it to spin a worm gear, to a large cog, then big generator as it slowly drops?

You'd still have the exact same issue with the amount of mass and/or height needed. Mass x height x 9.8m/s^2. For a kilowatt-hour of storage, mass x height needs to equal about 600,000. Gravity-based energy storage simply requires a lot of both for any worthwhile amount of energy.

Comment: Re:Credit System (Score 2) 438

by compro01 (#47887881) Attached to: If Tesla Can Run Its Gigafactory On 100% Renewables, Why Can't Others?

Banks of batteries are expensive and take up a lot of space. You'd need to provide several megawatts for several hours. That would require hundreds of 85kWh car battery packs.

And they'll be producing several hundred thousand such packs annually once the factory is operational.

Also, it's going to be a 10 million square-foot facility, with a few hundred more empty acres around it. I don't think they'll be pressed for space.

Comment: Re:Okay... and? (Score 1) 316

by compro01 (#47740247) Attached to: For Microsoft, $93B Abroad Means Avoiding $30B Tax Hit

That's very much incorrect. It's treated as a deduction

Read the site.

If you paid or accrued foreign taxes to a foreign country on foreign source income and are subject to U.S. tax on the same income, you may be able to take either a credit or an itemized deduction for those taxes.

You're assuming it is always option 2 (acts as a deduction), and ignoring option 1 (acts as a credit).


Ask Slashdot: How Many Employees Does Microsoft Really Need? 272

Posted by Soulskill
from the might-be-time-to-reevaluate-the-Clippy-department dept.
An anonymous reader writes: Yesterday, word came down that Microsoft was starting to lay off some 18,000 workers. As of June 5th, Microsoft reported a total employee headcount of 127,005, so they're cutting about 15% of their jobs. That's actually a pretty huge percentage, even taking into account the redundancies created by the Nokia acquisition. Obviously, there's an upper limit to how much of your workforce you can let go at one time, so I'm willing to bet Microsoft's management thinks thousands more people aren't worth keeping around. How many employees does Microsoft realistically need? The company is famous for its huge teams that don't work together well, and excessive middle management. But they also have a huge number of software projects, and some of the projects, like Windows and Office, need big teams to develop. How would we go about estimating the total workforce Microsoft needs? (Other headcounts for reference: Apple: 80,000, Amazon: 124,600, IBM: 431,212, Red Hat: 5,000+, Facebook: 6,800, Google: 52,000, Intel: 104,900.)

Comment: Re:Was she cured? (Score 2) 126

by compro01 (#47432721) Attached to: Child Thought To Be Cured of HIV Relapses, Tests Positive Again

Seems to me stupid to say a person is cured if they have to keep taking meds to prevent a relapse.
By that standard insulin is a cure for diabetes.

They thought she might have been cured as she went two years without the meds without suffering a relapse. Typically, a relapse occurs within weeks of discontinuing the medication.

But that ended up bring wrong, as she eventually did relapse, so now they need to figure out why it took so long for that to happen.

SCCS, the source motel! Programs check in and never check out! -- Ken Thompson