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Comment "OMG WTF PDF" lecture (Score 1) 202

If you're wondering what they're talking about you should watch this video. http://www.youtube.com/watch?v=54XYqsf4JEY

For a demo, see the 38:00 mark. The windows "calc.exe" is modified to simultaneously a valid windows exe, a valid zip archive, and a valid PDF. The same file can appear benign to anti-virus tools even though there is malware contained in the file when interpreted in certain ways.

-molo

Comment Re:The only thing taller.. (Score 1) 407

Okay, I found this on wikipedia about land use:

A 200 MW power plant with the same 1000-metre-high tower would need a collector 7 kilometres in diameter (total area of about 38 km^2).

http://en.wikipedia.org/wiki/Solar_updraft_tower#Conversion_rate_of_solar_energy_to_electrical_energy

Since this is "only" 800m, it will need a larger collector area (how much larger is unclear).

-molo

Comment Re:The only thing taller.. (Score 2) 407

Who said anything about more expensive? As for "similar heights", the largest radio tower was the Warsaw Radio Mast, which was 2164 ft before it collapsed. The currently tallest radio mast is the KVLY-TV mast which is 2063 ft. This would be 26% taller than KVLY, would be free-standing (unguyed), and would be solid (wind cannot blow through it). This tower is more comparable to a occupied structure.

The current highest capacity wind turbines are 7.6 MW. I haven't been able to find figures on the area proposed for the collector area of this tower, but it is possible that 30-50 simpler and proven wind turbines or 1 to 5 concentrated solar units might be able to replace this tower.

You know they wanted to build one of these in Australia, right? The proposal stalled and it looks like it will not be built.

-molo

Comment The only thing taller.. (Score 4, Informative) 407

This is a ridiculous idea. The only structure that is taller than 2600 ft is the Burj Khalifa (Burj Dubai), which is 2717 ft.

http://en.wikipedia.org/wiki/List_of_tallest_structures_in_the_world

The idea that we would build the 2nd tallest structure in the world for 200 MW is ridiculous. This doesn't even come CLOSE to being a top producer of energy per power plant. The top 10 power plants in the world all produce more than 6000 MW. Even the largest biofuel, geothermal and tidal plants currently exceed 200MW.

http://en.wikipedia.org/wiki/List_of_largest_power_stations_in_the_world

-molo

Comment Why I am not joining Google+ (Score 2) 1223

It seems that the invite-only PicasaWeb albums (where only specific google accounts have access) would no longer be invite-only. That alone is reason enough to not join G+. When signing up for G+, they gave the following notice:

Linking Google+ with Picasa Web Albums
When you join Google+:

        * [...]
        * Your albums' visibility settings aren’t changed, but people they’re shared with can now share them with others.
        * [...]

If they could fix this issue, I would sign up. Otherwise, forget it.

-molo

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