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We describe initial results which show " live " ultrasound echography data visualized within a pregnant human subject. The visualization is achieved by using a small video camera mounted in front of a conventional head-mounted display worn by an observer. The camera's video images are composited with computer-generated ones that contain one or more 2D(More)
This paper addresses the problem of correcting visual registration errors in video-based augmented reality systems. Accurate visual registration between real and computer-generated objects in combined images is critically important for conveying the perception that both types of object occupy the same 3-dimensional (3D) space. Previous augmented reality(More)
We introduce a power-aware microsensor architecture supporting a wide operational power range (from <1 mW to >10 W). The platform consists of a family of modules that follow a common set of design principles. Each module includes a local power microcontroller, power switches, and isolation switches to enable independent power-down control of modules and(More)
—A mathematical bit error rate (BER) model for upsets in memories protected by error-correcting codes (ECCs) and scrubbing is derived. This model is compared with expected upset rates for sub-100-nm SRAM memories in space environments. Because sub-100-nm SRAM memory cells can be upset by a critical charge (crit) of 1.1 fC or less, they may exhibit(More)
Augmented reality systems with see-through head-mounted displays have been used primarily for applications that are possible with today's computational capabilities. We explore possibilities for a particular application---in-place, real-time 3D ultrasound visualization---without concern for such limitations. The question is not "How well could we currently(More)
Split-fabrication has been proposed as an approach for secure and trusted access to advanced microelectronics manufacturing capability using un-trusted sources. Each wafer to be manufactured is processed by two semiconductor foundries, combining the front-end capabilities of an advanced but untrusted semiconductor foundry with the back-end capabilities a(More)
Integrated circuit design in the late CMOS era is challenged by the ever-increasing variability and reliability issues. The situation is further compounded by real-time uncertainties in workload and ambient conditions, which dynamically influence the degradation rate. To improve design predictability and guarantee system lifetime, accurate modeling, and(More)
Michael A. Bajura: (Under the direction of Henry Fuchs) This dissertation explores the problem of inserting virtual (computer-generated) objects into natural scenes in video-based augmented-reality (AR) systems. The augmented-reality system problems addressed are the shorter-term goal of making synthetic objects appear to be more stable and registered and(More)
We introduce a power-aware microsensor architecture supporting a wide operational power range (from &lt;1mW to &gt;10W). The platform consists of a family of modules that follow a common set of design principles. Each module includes a local power microcontroller, power switches, and isolation switches to enable independent power-down control of modules and(More)