By definition an automobile or car is a wheeled vehicle that carries its own motor and transports passengers. The automobile as we know it was not invented in a single day by a single inventor. The history of the automobile reflects an evolution that took place worldwide.
It is estimated that over 100,000 patents created the modern automobile. You can point to the many firsts that occurred along the way to producing the modern car; and with that goal in mind, highlighted below are articles, biographies, timelines, and photo galleries related to the history of the automobile and its many inventors.
Monday, August 23, 2010
Tuesday, July 6, 2010
HIPERLAN/2
HiperLAN/2 functional specification was accomplished February 2000. Version 2 is designed as a fast wireless connection for many kinds of networks. Those are UMTS back bone network, ATM and IP networks. Also it works as a network at home like HiperLAN/1. HiperLAN/2 uses the 5 GHz band and up to 54 Mbit/s data rate.[1]
The physical layer of HiperLAN/2 is very similar to IEEE 802.11a wireless local area networks. However, the media access control (the multiple access protocol) is Dynamic TDMA in HiperLAN/2, while CSMA/CA is used in 802.11a.
Basic services in HiperLAN/2 are data, sound, and video transmission. The emphasis is in the quality of these services (QoS).[1]
The physical layer of HiperLAN/2 is very similar to IEEE 802.11a wireless local area networks. However, the media access control (the multiple access protocol) is Dynamic TDMA in HiperLAN/2, while CSMA/CA is used in 802.11a.
Basic services in HiperLAN/2 are data, sound, and video transmission. The emphasis is in the quality of these services (QoS).[1]
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