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Comment Forward market (Score 1) 635

An electricity generator must sell their electricity to the market. A power plant may decide to sell forward 10 years of electricity in order to finance it's capital. It is then required to produce exactly the amount which it sold on each day. If it fails to produce this amount, the ISO will issue it large fines. Traditional PV solar is very unpredictable, as the sun can go behind a cloud and cut the power generated in half. This means it's very difficult to sell a contract to deliver a fixed amount of electricity. As such, large installations of solar PV have been rare in the US. However, most states have laws allowing for 'net metering'. This allows homes and small business to send small amounts of electricity back to the grid, without having to sell it to a power company in advance. In the US, coal and hydro cost less than $0.05/KWH. While I expect solar to continue to get less expensive, it's still by far the most costly way to generate electricity.

Comment Searches are still open to side channel attacks (Score 2, Interesting) 176

I study done a few months ago showed how one can easily deduce searches by looking at the size of the AJAX requests. http://www.schneier.com/blog/archives/2010/03/side-channel_at.html Yes, https should have been available a long time ago, and still isn't available for www.google.com.hk.

Comment find / grep / glimpse (Score 1) 532

On Windows I install cygwin, so I can execute grep. I use the following bash function to help me search code:

ffind ()
{
find . -name ".svn" -prune -o -name "CVS" -prune -o -name ".hg" -prune -o -exec grep --color=auto "$@" {} +
}

For larger code bases, I use the command line version of glimpse to search through the code. While there are a few open source code search engines, I find glimpse with a few formatting scripts works just fine.

Comment Re:Getting through the university barrier in the U (Score 2, Interesting) 252

I managed to complete a post-graduate course using Open Office. Assignments were given as Word documents, and needed to be submitted as the same. I always saved in Word 2000 format and my professors never had a problem. If Word was offered at the same price as OO, I would buy Word. I've only used OO because I'm too cheap and don't using office apps enough at home to justify the price. I wish OO were better than MS Office, but it's far behind. When ever I try to format text Writer never does what I want. I've tried drawing diagrams in Draw but soon gave up due to the poor interface, and Impress, well that's the worst of the lot.

Comment Re:sounds familiar (Score 2, Informative) 422

Do you know how much it costs to sell an $800 hammer? It's easy to sell a $10 hammer. For the $800 one, you need to hire a sales staff and lobbyists getting government contracts. You need to entertain your buyers, you may have to do trial runs, POC, RFP, provide 'free' training etc.. These things are all must be added into the cost of the product. I doubt Nintendo has sent salespeople to visit the doctors in the Melbourne, nor have they likely taken them out for dinner, provided them with equipment leasing options, or guaranteed a service and replacement contract. When I sent my Wii in for repair, it took six weeks and I lost all my data. You can't expect hospitals to get the same level of service as consumers.

Comment Re:TCP regulating congestion (Score 1) 187

TCP does effectively limit throughput by means of the Sliding Window Protocol. Packet loss will decrease the size of the sliding window, but on a congested network, the window will be slow to increase. What TCP doesn't offer is different Quality of Service. uTP attempts to run TCP at a lower priority than existing TCP traffic. Allowing Skype or YouTube to run at a higher priority is advantageous to the users of those services.

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