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An understanding of etiological mechanisms ( a ) facilitates a determination of prognosis , ( b ) provides information to inpiduals and their families that helps to clarify their understanding of the manifest disorder ( s ) , and ( c ) provides direction to research studies that will influence educational practice . Rules and practice directions are issued and amended from time to time by the various jurisdictions across the country . These devices are similar to gyroscopes and are used to control the spacecraft 's orientation - its positioning in three axes - so that it is facing the desired direction . That style could always have morphed in various directions , yet at each iteration of Moore 's Law , developers threw what they had as far toward realism as they could . Frontiers were not regions of unidirectional settlement - - the great opportunity that they offered attracted diverse people from various directions , who helped to create multicultural societies , although often with ethnic and racial conflict and violence . The pipe was oriented in a northern direction and was filling in the northeast portion of the pit . The terms of any agreement between the parties regarding confidentiality are relevant , as are applicable court rules and practice directions , and rules developed by private sector DR service providers to which the parties may subscribe .