Saturday, February 28, 2009
Lilac Chaser is a visual illusion, also known as the Pac-man illusion. It consists of 12 lilac (or pink, rose or magenta), blurred disks arranged in a circle (like the numbers on a clock), around a small black, central cross on a grey background. One of the disks disappears briefly (for about 0.1 second), then the next (about 0.125 second later), and the next, and so on, in a clockwise direction. When one stares at the cross for about 20 seconds or so, one first sees a gap running around the circle of lilac disks, then a green disk running around the circle of lilac disks, then a green disk running around on the grey background, the lilac disks having disappeared or having been erased by the green disk. This is due to an interesting effect in which the colors of the lilac disks are inverted in the optical illusion to a green color. (If the discs were blue, one would see yellow where the gaps were.)
Friday, February 20, 2009
Games
Nemesis Online 26b
Nemesis Online is an online remake of the saga of games Nemesis, Gradius and Salamander that Konami made in the decade of the 80. It is a free online game with up to 8 players simultaneously on the Internet. Includes a stage editor in order that people collaborate creating new phases.
- License:
Free
- Operating Systems:
Windows 2003, Windows Vista, Windows 95, Windows Me, Windows Server 2008, Windows 7, Windows NT, Windows 2000, Windows XP, Windows 98
- Additional Requirements:
DirectX 8.0 libraries
- Limitations:
No limitations
Opell Youtube FLV to WMV MPEG MOV AVI iPod PSP 3GP MP4 Zune Converter 2.1.18
Opell Youtube Video Converter can help you convert the FLV video files from Youtube to any video and audio format, including video format (wmv, rm, rmvb, avi, 3gp, mp4, h264, mpg, mpeg4, DivX, Xvid, dat, mkv, asf, mov, m2ts, vob, etc) and audio format (mp2, mp3, wma, wav, ra, m4a, aac, ac3, ogg, etc). You can playback on almost any portable devices including iPod, iPhone, Archos, PSP, PS3, Xbox360, Zune, Wii, Blackberry, mobile phone, MP4 player,Creative Zen Player,HP iPaq,Pocket PC,PDA,etc. Opell Youtube Video Converter is very easy to use and fast convert with the best quality. Enjoy your favorite FLV video clip on any device. Version 2.1.18 upgraded the AAC encoder core.
- License:
Free to try; $27.99 to buy
- Operating Systems:
Windows Vista, Windows 95, Windows Me, Windows 2000, Windows NT, Windows XP, Windows 98
- Additional Requirements:
Windows 98/Me/NT/2000/XP/2003 Server
- Limitations:
33%-conversion trial
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