Logo

Masters Gallery 2011

What is 802 Ronald Hall The 802.11g is one of the standards defined by IEEE Standards Committee for wireless local area networks (WLAN). Commonly known as WiFi, it is a specification that offers wireless transmission over relatively short distances of up to 54 megabits per second (Mbps). It replaced the original WiFi, standard, 802.11b, which only allows speeds up to 11 Mbps. Using the same bands as the 802.11b, the new WiFi specification operates at unregulated radio frequencies between 2.400 GHz and 2.4835 GHz. However, the newer version uses the orthogonal frequency division multiplexing (OFDM) used in the costlier 802.11a standard wherein a large number of closely spaced orthogonal sub carriers are used to carry data for higher data speed. Systems with 802.11g access points are backwards compatible with 802.11b network adapters, and the latter can be made compliant to the newer standard through a firmware upgrade. As 802.11g operates in the unregulated frequencies, 802.11b devices suffer interference from other products operating in the 2.4 GHz band, such as microwave ovens, Bluetooth devices, baby monitors and cordless telephones. COMPARING WIFI STANDARDSThe 802.11a standard has fast throughput and data speed and it doesn TMt get as much interference as the other protocols as it operates in a regulated frequency. This standard didn TMt catch the fancy of vendors and buyers as it is costlier to implement and the higher frequency means a shorter range signal that can be obstructed by walls. This protocol is currently in use in business networks. The 802.11g standard combines the good traits of 802.11a and 802.11b: high throughput and actual data brian hartline white jersey speeds and longer range signal that can penetrate walls (though subject to interference).
often have along oneedge. What follows is a description and illustration of how thebalance beam should be constructed: The center hole should be exactly in the center so that when thebeam is supported by a nail through this center hole, it will spinaround freely. The two end holes should be in line with the centerhole and equidistant on each side. Two other holes should be drilledon a line directly above the center hole. The hole size is notcritical, about 1/8 of an inch is fine. (We sincerely hope it willnot be too difficult for you to accomplish this. We fooled aroundwith metal hangers, etc. but nothing simple seemed to work as well asa carefully prepared stick.) It will be necessary to poke holes in the portion cups. Should youdo this in advance or can your students do it? A small nail workswell for this purpose. Probably time could be saved in class if thenecessary strings were cut to length in advance (and perhaps eventied to the cups). You shouldbuild one prototype Weight Scale in advance so you can work
Articles Connexes?