in the form of passive seismic methods, broadband seismometers have been used in hydrocarbon exploration. the frequency bandwidth typically studied is in the range of 1–6 hz. the observations on low frequency band of microtremors are used to calculate the spectral ratio of vertical and horizontal components (v/h) and power spectral density (psd). attributes based on the v/h ratio and the psd ha...

The computer industry has defined the IEEE 802.16 family of standards that will enable mobile devices to access a broadband network as an alternative to digital subscriber line technology. As the mobile devices join and leave a network, security measures must be taken to ensure the safety of the network against unauthorized usage by encryption and group key management. IEEE 802.16e uses Multica...

Network Monitoring is a base for Usage Accounting, Network Auditing, Intrusion Detection , Protocol Analysis, Flow Statistics etc. Normally, network monitoring is quite common at low broadband network, especially in 100M/10M Ethernet . While in high broadband backbone, for example Gigabit Ethernet and 2.5G POS (OC48) backbone, a lot of problems exist, including tapping point, packet loss on NIC...

the computer industry has defined the ieee 802.16 family of standards that will enable mobile devices to access a broadband network as an alternative to digital subscriber line technology. as the mobile devices join and leave a network, security measures must be taken to ensure the safety of the network against unauthorized usage by encryption and group key management. ieee 802.16e uses multica...

A platform network is an integrated high-capacity general-purpose network. The platform model dominates the market for wired broadband services, reducing the amount of infrastructure required and enabling rapid deployment of new services. We argue that wireless broadband is fundamentally different from wired broadband in ways that limit the benefits of platform networks. Instead, for both techn...