Weblog
20/04: Image Resolution & Printing
If you are starting to use an online photo printing lab then you will find the following useful."This handy table shows the standard image resolution in pixels that average megapixel cameras will create. Remember: always use the highest resolution setting in your camera for images that you will want to print.
Camera megapixels Approximate standard image resolution in pixels
2 megapixels 1600 x 1200
3 megapixels 2048 x 1536
4 megapixels 2274 x 1704
5 megapixels 2560 x 1920
6 megapixels 2816 x 2112
7 megapixels 3072 x 2304
8 megapixels 3456 x 2304
10 megapixels 3648 x 2736
12 megapixels 4288 x 2848
This table shows the optimal and minimum image resolution for printing at AdoramaPix%u2019s print sizes. We recommend image resolution of at least 300 pixels per inch inch (it’s abbreviated dpi for Dots Per Inch) for the best possible image quality, but we will print photos for images of at least 100 pixels per inch. Anything below that? You guessed it, the blocky blurriness.
Print size Optimal Resolution Minimum Resolution
For good print quality Less optimal image quality
300 px per inch 100px per inch
3.5x5 1500 x 1050 500 x 350
4x5 1500 x 1200 500 x 400
4x6 1800 x 1200 600 x 400
4x12 3600 x 1200 1200 x 400
(panoramic)
5x5 1500 x 1500 500 x 500
5x7 2100 x 1500 700 x 500
6x9 2700 x 1800 900 x 600
8x8 2400 x 2400 800 x 800
8x10 3000 x 2400 1000 x 800
8.5x11 3300 x 2550 1100 x 850
8x12 3600 x 2400 1200 x 800
9x12 3600 x 2700 1200 x 900
10x10 3000 x 3000 1000 x 1000
11x14 4200 x 3300 1400 x 1100
12x12 3600 x 3600 1200 x 1200
12x18 5400 x 3600 1800 x 1200
16x20 6000 x 4800 2000 x 1600
20x30 9000 x 6000 3000 x 2000
24x36 10800 x 7200 3600 x 2400
09/02: a perpetual motion machine?
Turning physics on its ear...Has a college dropout done the impossible and created a perpetual motion machine?
Markus Zahn, Massachusetts Institute of Technology professor, a leading expert on electromagnetic and electronic systems in a rare move for any reputable academic has agreed to give Heins' creation an open-minded look rather than greet it with outright dismissal.
Contacted by phone a few hours after the test, Zahn is genuinely stumped – and surprised. He said the magnet shouldn't cause acceleration. "It's an unusual phenomena I wouldn't have predicted in advance. But I saw it. It's real. Now I'm just trying to figure it out."
There's no talk of perpetual motion. No whisper of broken scientific laws or free energy. Zahn would never go there – at least not yet. But he does see the potential for making electric motors more efficient, and this itself is no small feat.
read more...
Also be sure to read, "Holy crap, this is really scary", the story of how this was discovered/invented. (refrenced in the above story)
03/12: The first 100 Registered Domains:
The DNS was created in 1984 and in 1985 top level domains were defined. The first top level domains were COM, ORG, EDU, GOV, MIL and ccTLD.In April 1985 cmu.edu, purdue.edu, rice.edu and ucla.edu were the first registered domain names.
The first .gov was css.gov and was registered in June 1985.
The first .org was mitre.org and was registered in July 1985.
Now for the first .com which was registered on March 15 1985 and it was symbolics.com which still happens to be up and running, although not much to look at.
Read more to see the list.
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