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Sadly , there is no shortage of important topics deserving very careful attention at each of the forums by the metropolitan emergency management officials of the country 's large cities . We generate some topics in-house , we also welcome submissions from outside , over the transom . Enter a search string in the WebHome topic or the WebSearch topic accessible from the Search link on each topic . " " Head First Design Patterns , authored by Elisabeth Freeman and Eric Freeman , because of its copious and engaging Java examples and clear pictures , is therefore a breakthrough , making this difficult topic accessible to many more programmers . ( For art history topics available see list above .