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With the rapid changes taking place in the network operation environment, ISPs today face a challenge. Networks are becoming more complex with the inclusion of diverse types of devices. New services such as IPTV and VoIP make the jobs of network administrators more difficult, by requiring new equipment, with new protocols and new technologies. As well, ISPs are forced to reduce the costs of network...
In recent, field emission lamp (FEL) with carbon nanotube (CNT) field emitters was intensively studied for a high performance back light unit (BLU) in LCD. The CNT-FEL can give a local dimming BLU increasing contrast ratio, reducing motion blur and saving power consumption. The local FE blocks, in general, are arranged in a matrix format and addressed by voltage pulse signals. In this method the row...
In this paper, we investigated EM wave absorber for a ceiling of a tollgate in ETC system. The EM wave absorber samples were made of CPE and Flake Sendust powders, which can be manufactured with mechanical forging of spherical Sendust powders using attrition mill to get high value of magnetic permeability and dielectric permittivity in high frequency range. The absorption ability of the samples were...
Recently, wireless LAN is often applied at home or in office for several convenience merits. Frequency band of wireless LAN is 2.4 GHz and 5.2 GHz which are specified IEEE 802.11a and IEEE 802.11b. Wireless LAN environment in office has reflected waves that are caused by walls, ceilings, floors, and desks. It creates multi-path problems. Which reduce communication speed and lose data. To solve these...
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