Joel L. Morrison

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BACKGROUND People who are not present at a traumatic event may also experience stress reactions. We assessed the immediate mental health effects of the terrorist attacks on September 11, 2001. METHODS Using random-digit dialing three to five days after September 11, we interviewed a nationally representative sample of 569 U.S. adults about their reactions(More)
The theory of map generalization is discussed with particular reference to the processes of simplification and classification. Both of these processes are used extensively in computer-assisted cartography; however, a comprehensive, flexible software package has not yet been organized from the myriad of algorithms available. Further, systematic use of(More)
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