The invention relates to aluminoborosilicate-based glasses suitable for use as a solid laser medium. Water and hydrocarbons are separated in a down-hole separator and are brought separately to the seabed. The sidewall isolation is removed in a portion of the trench. The Fuel Efficient Power Steering control algorithm is an optimal method of regulating flow by actuating the electronic flow control device in the pump assembly. The inner rotor is divided into at least two lobed portions by cutting the inner rotor along a plane substantially perpendicular to the axis of rotation. Changes to the architecture or in the number of column decoder selectors are not required.