C. Durward Rogers

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In insects, the boundary between the embryonic head and thorax is formed by the dorsal ridge, a fused structure composed of portions of the maxillary and labial segments. However, the mechanisms that promote development of this unusual structure remain a mystery. In Drosophila, mutations in the Hox genes Sex combs reduced and Deformed have been reported to(More)
A VLSI design system called VIVID is the heart of a newly developed, vertically integrated design environment. This environment provides support for all phases of design from high-level system specification through on-site fabrication to construction of prototype systems. Key features already Implemented include: the use of a circuit description language at(More)
In the past, Virtual-Grid Compactors have not been well received because they generated sparse layouts. In analyzing this problem, we found three major areas where improvements could be made: breaking the virtual-grid lines into segments; decoupling the placement of non-interacting layers; and eliminating the centered nature of elements. The result is a(More)
<italic>This paper describes the</italic> VIVID <italic>(Vertically Integrated VLSI Design) System developed at the Microelectronics Center of North Carolina. The system is based on a symbolic, virtual-grid design methodology that greatly reduces the design time for custom VLSI circuits. This methodology has made it possible to provide, in a single(More)
A research organization or graphics house often has a need for custom pictures for presentations or other purposes. These pictures may be prohibitively expensive, if not impossible to create, if they are produced by a commercial art firm. For groups that have such a need, an in-house computer-controlled camera may be a solution. To develop a quality system,(More)
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