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April 19, 2005

Robot, QRIO

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What's Robot? in fact we don't have a specific definition for robot but we can define robot with some specification.usually it's a mechanical machine but these days we can see some software robots so it can be non mechanical, it's reprogrammable and it can intelligence. for instance in industry it move material,part,tools through variable programmed.
Have you ever thought about future and robots? in fact how they would can change our social life in future? how can AI (Artificial Intelligence) help them for thinking like human?
I would like to see those days when we live with intelligence robots.
As you know Sony is a big company and they work on a wonderful project that named QRIO (quest and curious).Sony's goal is personal entertainment so they produced QRIO , it embodies advance technologies in motion control, communication , artificial intelligence.
Major technology includes stable dynamic walking, dancing and running, full arm movement allowing throwing a ball, voice/face recognition, stereoscopic vision, obstacle avoidance, visual mapping, wireless network and ....
you can find more information about QRIO at sony web site http://www.sony.net/SonyInfo/QRIO/

Posted by Mehrdad at 12:02 PM

April 04, 2005

NAT Traversal

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Probably you heard IPSEC ESP doesn't work through PAT connection because when the PAT wants to modify ESP layer 4 header it faces to problem. why? because it's encrypted and PAT can't change source port. don't worry the RFC 3948 written by four major companies (F-Secure Corporation, Microsoft, Cisco and Nortel) at jan.2005, can help us but what's your VPN vendor? because all vendor haven't implemented yet.
How does it work?
In fact this protocol defines methods for encapsulate and decapsulate ESP packet inside the UDP for traversing through network address translators.

nattp.jpg

It's so good for any network which are using PAT and they want to have IPSEC ESP from any hosts of its network.really this protocol help to limitation IP V4 (special thanks to the IETF (Internet Engineering Task Force) for fix this problem in working ESP through PAT)

See detail of this protocol from the following URL :
UDP Encapsulation of IPsec ESP Packets RFC
http://www.faqs.org/rfcs/rfc3948.html

Posted by Mehrdad at 05:39 PM