Abstract: There is disclosed a non-progressive modular wall system for wall heights greater than eight feet that does not require excessive demolition of adjacent wall panels and framing posts above and below the moment connection, typically at the eight foot level. The wall system assembly includes framing at the moment connection comprising connector or junction blocks fastened to the ends of the framing posts. The connector blocks abut each other and are fastened together at the moment connection and allow for selective removal of the framing posts. The disclosed wall system meets the lateral load and deflection requirements for non-progressive wall systems having wall heights greater than eight feet.

Abstract: An integrated controller for controlling both pan and vergent movements of a stereoscopic vision system, having two cameras, is described. The controller determines motion and direction based on a provided retinal error. Each of the cameras is moved until no retinal error remains which results from camera orientation. A butterfly controller accepts data input relating to retinal errors from any number of sources and provides a single signal relating to common motion and another signal relating to vergent motion to each control circuit. The circuits are designed to operate in common mode or differential mode thereby causing sensors to move in different directions when controlled by same control signals.

Abstract: A method and an apparatus for determining the thickness of a layer of a first liquid above an interface formed by the first liquid and the second liquid underlying the first liquid in a subterranean formation. The apparatus includes an elongated metal rod having a sharpened distal end. An electrode is provided adjacent the sharpened distal end to indicate when the interface formed by the two liquids has been reached. A lengthwise running elongated slot is provided in the outer surface of the body of the metal rod and contains an indicator strip. The indicator strip is adapted to undergo a color change upon contact with the first liquid. By measuring the length of the indicator strip which has undergone a color change, the thickness of the layer of the first liquid can be determined.