51,296 research outputs found
The Solar Cycle Field Reversal
A non-mathematical model of the solar cycle field
reversal is presented. The basic process producing the
reversal in this model is surface reconnection of higher
latitude p-flux with lower latitude f-flux. This picture
differs substantially from the reversal aspect of the
solar cycle field geometry presented by Babcock (1961),
but the discussion is carried out entirely within the context of the flux ropes he originally considered
Development of battery separator material process Interim report
Dose rate of irradiation grafting for polyethylene film with acrylic aci
Development of Battery Separator Material Process Quarterly Report, 8 Jan. - 31 Mar. 1969
Polyethylene film grafts, grafting solution properties, and effects on electrical resistanc
Development of battery separator material process Quarterly report, 2 Jul. - 30 Sep. 1969
Battery separator materials from acrylic acid grafting solution with polyethylene film effect
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Autonomic arousal and attentional orienting to visual threat are predicted by awareness
The rapid detection and evaluation of threat is of fundamental importance for survival. Theories suggest that this evolutionary pressure has driven functional adaptations in a specialized visual pathway that evaluates threat independently of conscious awareness. This is supported by evidence that threat-relevant stimuli rendered invisible by backward masking can induce physiological fear responses and modulate spatial attention. The validity of these findings has since been questioned by research using stringent, objective measures of awareness. Here, we use a modified continuous flash suppression paradigm to ask whether threatening images induce adaptive changes in autonomic arousal, attention, or perception when presented outside of awareness. In trials where stimuli broke suppression to become visible, threatening stimuli induced a significantly larger skin conductance response than nonthreatening stimuli and attracted spatial attention over scrambled images. However, these effects were eliminated in trials where observers were unaware of the stimuli. In addition, concurrent behavioral data provided no evidence that threatening images gained prioritized access to awareness. Taken together, our data suggest that the evaluation and spatial detection of visual threat are predicted by awareness
Development of battery separator material process Final report
Battery separator material made by grafting and crosslinking polyethylene film
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