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Comment: Re:Hype pain (Score 2) 75

by otuz (#49500807) Attached to: Rocket Lab Unveils "Electric" Rocket Engine

The efficiency of electric motors is around 90%, so I'm assuming the fuel-powered pumps have such a low efficiency it's worth using batteries instead of fuel to save weight. These are also unlikely to have rechargeable batteries, so the energy density may be an order of magnitude higher than let's say rechargeable LiPO-batteries.

Comment: Re:What in the actual fuck! (Score 4, Informative) 152

by otuz (#49468745) Attached to: Sharp Announces 4K Smartphone Display

About 17Hz or a bit more with most single DVI outputs, although 14Hz is the minimum required for DVI by actual spec. Twice that with two DVI signals. The display itself does the thing by partitioning the display; either 3840x2400@14+Hz or 2x1920x2400@28+Hz side-by-side or 4x1920x1200@60Hz in a 2x2 grid, capped by the display at 41Hz or 48Hz depending on the model.

Comment: Re:What in the actual fuck! (Score 2) 152

by otuz (#49468731) Attached to: Sharp Announces 4K Smartphone Display

I have one of these (rebadged T221; ViewSonic VP2290b), got it second-hand in 2008 or 2009. It's not just the display connection bandwidth, the 41Hz and later-model 48Hz limit is from the display internals. They use huge custom FPGA logic chips to drive the signals, which are apparently not fast enough for more than that, although some of them can be overclocked to drive almost 60Hz. Without these internal display limitations, four DVI cables have enough bandwidth to run one at 60Hz (4x1920x1200@60Hz).

I haven't bothered to drive mine with four cables, because with just two (1920x2400) DVI signals I get it up to 34Hz, but I've scaled it down to 30Hz, because it's evenly divisible by 60Hz. In normal desktop use, it's fast enough. For gaming and movies, there are other displays.

Eventually there'll be a point in resolutions when it's bandwidth-wise better to have the GPU on the display side and just run some future thunderbolt-esque long cable than running even higher bandwidths to the display. An 8k display with a resolution of 7680x4320 would require 50Gbps of bandwidth to be driven at 60Hz at 8bpp or 60GHz at 10bpp. The actual required data rate between the CPU, RAM and GPU is much lower nowadays, especially because most of the heavy lifting like rendering and video decoding is done by the GPU.

Comment: Re:Why even 3? (Score 3, Insightful) 96

by Courageous (#48935853) Attached to: 'Anonymized' Credit Card Data Not So Anonymous, MIT Study Shows

This article isn't scary. What should be scary is that cell companies cell anonymitized _geolocation_ data. That data can be used to deterimine: A) who you are, B) where you live, C) where you work, and D) who your friends are. Step #1. Look where the phone is, regularly at midnight. Step #2, cross reference with public records databases on property ownership. That get's 65% of Americans right there. Now check where it parks every day at noon. Place of work found. And so forth.

Comment: Re:what if... (Score 2) 716

by Courageous (#46227359) Attached to: Ask Slashdot: Should Developers Fix Bugs They Cause On Their Own Time?

Yeah. This guy's boss is an ass hat. The analogy involves a contractor. If that contractor wall-builder has employees, no, they don't actually work for free. Meanwhile, in addition to the labor rates the contractor charges, they'll have overhead for business operation, risk, and profit margin. So if this guy's ass hat boss is expecting that, then he should expect to pay a lot more for the work. Idiot.

Comment: Re:lizard-brain visual heroine (Score 1) 361

by Courageous (#46161533) Attached to: Ask Slashdot: What Online News Is Worth Paying For?

There's a fifth level for ads. They create a background awareness such that when the demand does materialize, and you are presented an array of choices to satisfy the demand, you pick the advertised thing, simply because it seems most familiar. This is, in fact, one of the more powerful impacts of advertising.

Comment: Re:someone got paid (Score 2) 237

by Courageous (#46108557) Attached to: Hard Drive Reliability Study Flawed?

I know Henry. He's an enterprise storage guy. My guess is that he was coming from the perspective of enterprise storage builders. Which is to say, the Backblaze data may be a fine review of the experience consumers are likely to have with hard drives, it's a terrible review of what enterprise storage platform makers would do and what their buyers would expect. Whether or not that's an appropriate response to Backblaze, who intentionally and haphazardly uses consumer drives in their systems, is its own question. But what is certainly true is that you won't experience these kinds of failures from Tier 1 storage manufacturers (e.g., IBM, NetApp, EMC, Hitatchi Data Systems, et al). So in that particularly biased way, the study is indeed "deeply flawed".

Comment: Re:"Here's your gift from Amazon!" (Score 2) 243

by Courageous (#46007539) Attached to: Amazon: We Can Ship Items Before Customers Order

No, the law hasn't changed at all. But that's not what they're referring to here. Amazon ships the item to a local dispatch point, and holds the final leg of the shipment until the last possible minute. If that final order doesn't materialize, Amazon is being charged for the charge to the local distribution point (and back).

Comment: Re:Can't directly compare PC and phone sales ... (Score 1) 511

by otuz (#45979319) Attached to: Apple Devices To Reach Parity With Windows PCs In 2014

iPhone 4 and newer iPhone battery replacement is fairly trivial:

1: Buy a battery and a pentalobe driver or bit from dealextreme or ebay for about $10
2: Uscrew the two case screws
3: Slide the back cover off
4: Unscrew the battery connector screw
5: Replace the battery and reassemble the back cover

I've done it about once a year on my iPhone 4, once the average recharge interval goes from about five days to about three days.

Comment: Re:Well, for your second problem... (Score 1) 388

by Courageous (#45931261) Attached to: Ask Slashdot: What To Do With Misdirected Email?

Huh? "myfirstname.mylastname@myemailprovider.com" is my account on every computer in the world as far as I am concerned. If someone else fraudently registered it, they can take me to court and see how well the court receives their fraud. Not well, in any non-barbaric country, I am sure.

It's time to boot, do your boot ROMs know where your disk controllers are?

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