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According to James Britton, too much emphasis is being placed currently on revision. In his essay, "Shaping at the Point of Utterance," Britton notes that (1) concentrating on the reader in teaching writing can disturb the writer's ability to formulate what he or she wants to say; (2) the essence of the writing process is not writing something to be cleaned up later, but rather creating connections between ideas; (3) a precise and explicit mastery of the rules of writing can obstruct effective writing; and (4) writing develops in a complex relationship to speech and not by a process of differentiating between spoken and written discourse. This information conflicts directly with some of the basic principles that underly many composition texts and teaching models. Britton also states that the basic force of writing comes less from the effort to persuade a reader and more from the effort to articulate the writer's experience. This suggests the great value in writing instruction of using very frequent short writings, emphasizing validation through the writer's experiential knowledge, and staying aware of the close relationships between writing and speaking and between writing and learning. (HOD)

We present 3D hydrodynamical simulations of a jet launched from the secondary star of a binary system inside a proto-planetary nebula. The secondary star moves around the primary in a close eccentric orbit. From the gasdynamic simulations we compute synthetic [NII] 6583 emission maps. Different jet axis inclinations with respect to the orbital plane, as well as different orientations of the flow with respect to the observer are considered. For some parameter combinations, we obtain structures that show point- or mirror-symmetric morphologies depending on the orientation of the flow with respect to the observer. Furthermore, our models can explain some of the emission distribution asymmetries that are summarized in the classification given by Soker & hadar (2002).

We present 3D hydrodynamical simulations of a jet launched from the secondary star of a binary system inside a proto-planetary nebula. The secondary star moves around the primary in a close eccentric orbit. From the gasdynamic simulations we compute synthetic [NII] 6583 emission maps. Different jet axis inclinations with respect to the orbital plane, as well as different orientations of the flow with respect to the observer are considered. For some parameter combinations, we obtain structures that show point- or mirror-symmetric morphologies depending on the orientation of the flow with respect to the observer. Furthermore, our models can explain some of the emission distribution asymmetries that are summarized in the classification given by Soker & hadar (2002).

We present 3D hydrodynamical simulations of a jet launched from the secondary star of a binary system inside a proto-planetary nebula. The secondary star moves around the primary in a close eccentric orbit. From the gasdynamic simulations we compute synthetic [NII] 6583 emission maps. Different jet axis inclinations with respect to the orbital plane, as well as different orientations of the flow with respect to the observer are considered. For some parameter combinations, we obtain structures that show point- or mirror-symmetric morphologies depending on the orientation of the flow with respect to the observer. Furthermore, our models can explain some of the emission distribution asymmetries that are summarized in the classification given by Soker & hadar (2002).