Basic design concepts for sustainable landscapes by Ann Marie VanDerZanden

By Ann Marie VanDerZanden

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Such search might be made more efficient using a large mechanism library and suitable indexing techniques such as (Sycara and Navinchandra, 1990). However, it is not clear how such a generation process could be guided to only furnish functionalities which are in fact interesting. One way to do this might be to provide such a search with a set of specifications taken from a standard mechanism textbook and ask it to find novel solutions which satisfy them. However, the combinatorial problems associated with such a search are considerable, and we think that only supporting a designer's creativity has a greater practical importance.

One, this approach can be applicable to a wider domain than any of the above, a feature frequently required in mechanical designs. Two, the above procedures mainly address synthesis of topological descriptions of solutions. Three, the representation and reasoning in this approach is mainly "decompositional", whereas that in others except the Mechanisms approach is "transformational" (classifying as in Maher, 1990). The present approach is different from the Mechanisms approach in that here structures are combined first to form the essential concept, and only then are the connections chosen to enable these structures to function in the stipulated ways, whereas in the Mechanisms approach a set of connections are topologically combined to provide the freedom in motions required by the problem.

E. that the function of a particular structure is not independent of the context it is used in. Because of interactions through the geometry of the shapes, this is in fact the case. As an example, consider the design of a device which prevents a block from dropping in the negative Y -direction, a function which could be represented as: - Device (A, B) behavior: Y (A) =I -1 Assume that the system has prototypes Proto-l and Proto-2 where part A is restricted to move vertically and parts Bl and B2 to move horizontally only (Figure l(a) left and right).

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