Introduction to DAC 2007 Special Section This special section of the ACM Journal of Emerging Technologies in Computing Systems includes three articles selected from the emerging technologies track of the 2007 IEEE/ACM Design Automation Conference (DAC). During the past few years, DAC has included presentations (including special sessions) on emerging technologies for computing and sensing systems. There is heightened interest within the design automation community in alternative technologies that can help us overcome the roadblocks that loom ahead for the continued scaling of silicon CMOS technology. New materials, new device geometries, and further downscaling of device dimensions and supply voltages are together leading to a signi cant escalation in manufacturing cost, as well as unpredictable circuit performance due to process variability. As a result, experts are predicting that CMOS scaling will stop in the near future, perhaps as early as 2015. Alternative computing technologies being explored today include carbon nanotubes, thin- lm transistors, nanowires, DNA-based devices, and hybrid circuits made from mainstream CMOS and newer nanodevices. Together with advances in manufacturing techniques, new design paradigms based on these emerging technologies are being explored. Research groups worldwide are addressing various aspects of circuit and system design, such as modeling,
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