It is a cross in the hydraulic systems with long pipes case modeling of the hardest and most important cases in search. Of the most important and is considered Query to achieve study the changing resistance model is used to describe the changing liqu
id flow in the tube. As described by knowing the nature of the shear stress to the pipe wall and also know the nature of the flow ( laminar or turbulent ). The results of simulations of hydraulice shock caused by the sadden move of the hydraulic control valve which studied in the following cases:
1- Hard to improve the discharge of the pump rate.
2- Improve the discharge of the pump variable rate finally; compare the results of computer simulations with experimental results.
This research was aimed to study the behavior of adults of the
Longhorn beetle, Cerambyx dux F. (Cerambycidae, Coleoptera) on
apple tree. Results showed that the adults have a diurnal habit.The
adults emerged from pupa was sexually matured, and fed only for
survival.
In Yemen, the outcropping Cretaceous System consists of continental and
marine clastics and carbonates which are distributed in three main lithofacies:
continental (in northern provinces), transitional (in western parts of southern
provinces), and
marine (in eastern parts of southern provinces). These are
included within the Tawilah Formation and Ahwar/Mahra Groups. The
occurrence of the Tawilah Formation (Cretaceous-Paleocene) is restricted to
the northern provinces. Its lower parts consist of continental (fluvial)
sandstones (continental lithofacies) of Cretaceous age which constitute the Zone
without diagnostic fossils. Its upper parts consist of alternations of nonmarine
and fossiliferous marine sandstones of Paleocene age which constitute the
Pulsiphonina prima Zone.
