we studied the role of nutrients on various aspects of the periphyton community in artificialstreams. dry mass, ash-free dry mass, chlorophyll a and biovolume of the periphyton community weremeasured under 3 different nutrient regimes, including one from natural streams as a control and twowhich were enriched with n and n+p. results of this experiment indicate that the standing crop of theperip...

In the TRAFCOD method, control of traffic signals at an intersection is formulated in terms of traffic streams, without reference to stages (sets of streams that are green together). The resulting formulation is more flexible and direct than stage control, allowing for easy implementation of a variety of traffic control tactics, including priority tactics for public transport, demand responding...