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Excessive test power can cause multiple issues at manufacturing as well as during field test. To reduce both shift and capture power during test, we propose a DFT-based approach where we split the scan chains into segments and use extra control bits inserted between the segments to determine whether a particular segment will capture. A significant advantage of this approach is that a standard ATPG tool is capable of automatically generating the appropriate values for the control bits in the test patterns. This is true not only for stuck-at fault test sets, but for Launch-off-Capture (LOC) transition tests as well. It eliminates the need for expensive post processing or modification of the ATPG tool. Up to 37% power reduction can be achieved for a stuck-at test set while up to 35% reduction can be achieved for a transition test set for the circuits studied.
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Fully Differential Study of Dissociative Single Capture and Coulomb Explosion through Double Capture in p + H2 Collisions
- Award ID(s):
- 1703109
- PAR ID:
- 10058418
- Date Published:
- Journal Name:
- Physical review. A
- Volume:
- 96
- ISSN:
- 1050-2947
- Page Range / eLocation ID:
- 042708
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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null (Ed.)Excessive test power can cause multiple issues at manufacturing as well as during field test. To reduce both shift and capture power during test, we propose a DFT-based approach where we split the scan chains into segments and use extra control bits inserted between the segments to determine whether a particular segment will capture. A significant advantage of this approach is that a standard ATPG tool is capable of automatically generating the appropriate values for the control bits in the test patterns. This is true not only for stuck-at fault test sets, but for Launch-off-Capture (LOC) transition tests as well. It eliminates the need for expensive post processing or modification of the ATPG tool. Up to 37% power reduction can be achieved for a stuck-at test set while up to 35% reduction can be achieved for a transition test set for the circuits studied.more » « less
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Electron captures on nuclei play an essential role for the dynamics of several astrophysical objects. The capture rate can be derived in perturbation theory where allowed nuclear transitions (Gamow-Teller transitions) dominate, except at the higher temperatures achieved in core-collapse supernovae where also forbidden transitions contribute significantly to the rates. There has been decisive progress in recent years in measuring Gamow-Teller (GT) strength distributions using novel experimental techniques based on charge-exchange reactions. These measurements provide not only data for the GT distributions of ground states for many relevant nuclei, but also serve as valuable constraints for nuclear models which are needed to derive the capture rates for the many nuclei, for which no data exist yet. In particular models are needed to evaluate the stellar capture rates at finite temperatures, where the capture can also occur on excited nuclear states. There has also been significant progress in recent years in the modelling of stellar capture rates. This has been made possible by advances in nuclear many-body models as well as in computer soft- and hardware. Specifically to derive reliable capture rates for core-collapse supernovae a dedicated strategy has been developed based on a hierarchy of nuclear models specifically adapted to the abundant nuclei and astrophysically conditions present at the various collapse conditions. This manuscript reviews the experimental and theoretical progress achieved recently in deriving stellar electron capture rates. It also discusses the impact these improved rates have on the various astrophysical objects. (Abridged)more » « less
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Abstract Visual attention, the selective prioritization of sensory information, is crucial in dynamic, information-rich environments. That both internal goals and external salience modulate the allocation of attention is well established. However, recent empirical work has found instances of experience-driven attention, wherein task-irrelevant, physically non-salient stimuli reflexively capture attention in ways that are contingent on an observer’s unique history. The prototypical example of experience-driven attention relies on a history of reward associations, with evidence attributing the phenomenon to reward-prediction errors. However, a mechanistic account, differing from the reward-prediction error hypothesis, is needed to explain how, in the absence of monetary reward, a history of target-seeking leads to attentional capture. Here we propose that what drives attentional capture in such cases is not target-seeking, but an association with instrumental information. To test this hypothesis, we used pre-cues to render the information provided by a search target either instrumental or redundant. We found that task-irrelevant, physically non-salient distractors associated with instrumental information were more likely to draw eye movements (a sensitive metric of information sampling) than were distractors associated with redundant information. Furthermore, saccading to an instrumental-information-associated distractor led to a greater behavioral cost: response times were slowed more severely. Crucially, the distractors had equivalent histories as sought targets, so any attentional differences between them must be due to different information histories resulting from our experimental manipulation. These findings provide strong evidence for the information history hypothesis and offer a method for exploring the neural signature of information-driven attentional capture.more » « less
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Accepted Manuscript1.0
- Journal Article:
- The DOI is not currently available.
