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By Keith M. Reynolds, Paul F. Hessburg, Patrick S. Bourgeron

Since 1997, the atmosphere administration choice help (EMDS) method has been used worldwide to aid environmental research and making plans in lots of various program parts, and it's been utilized over a variety of geographic scales, from woodland stands to complete international locations. an intensive sampling of this variety of functions is gifted in part 2, during which EMDS software builders describe the various makes use of of the approach. those money owed, including the needful history in part 1, offer worthy functional insights into how the procedure should be utilized within the basic area of environmental management.

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Keywords NetWeaver Á Fuzzy logic Á Decision support 1 Background A computer-based model of human expertise is called a knowledgebase. NetWeaver is a knowledgebase development system that provides a graphical environment in which to construct and evaluate knowledgebases (Saunders and Miller 1997) built with dependency networks (see definition below). Before the advent of NetWeaver, we built knowledgebases by drawing dependency networks on whiteboards or flipcharts. These drawings were then handed off to a knowledge engineer to code.

The logical nodes that are available for use within NetWeaver are shown in Table 1. In addition to purely logical operators such as AND, OR, and NOT, there are other operators that can be useful when dealing with multiple sources of data that vary in terms of desirability, accuracy, quality, and relevance. In the DEWA/ UPDE model, the sequential OR (SOR) node was used frequently. This node (Fig. 3, EPT taxa found) provides the modeler with the ability to specify the order in which the model will use data, and in so doing, consistently apply the best available data to the model.

16 K. M. Reynolds and P. F. Hessburg EMDS also has a potentially useful role to play in assessing plan performance. To set the stage, let us suppose that an initial landscape evaluation was performed at year 5 (we are continuing the earlier example, and assuming it took 5 years to get to the first evaluation), and, following a planning exercise, a strategy for landscape improvement was selected and implemented. It is now 5 years later (year 10), the monitoring data have been updated to reflect the current landscape condition, and managers want to assess how well the plan is performing.

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