They are a slate gray on the top and white underneath. I thought of a titmouse, but these birds don't have the tuft on their heads. They are agressive, fighting off other birds and even sometimes their own species. Maybe all birds are this way, but these little gray ones seem more agressive than others at the feeders.
Figure 3.6 An independent BSS (IBSS) is the most basic type of 802.11 wireless LAN. Figure 3.7 An Extended Service Set (ESS) 802.11 wireless LAN consists of multiple cells interconnected by access points and a distribution system, such as ethernet.
A Decision Support System (DSS) is a specialized information system designed to facilitate decision making in organizations. It is typically used when a problem is unstructured or when circumstances are uncertain. A DSS uses a combination of data and models in an easy-to-use interface.