26 research outputs found
Neural correlates of processing valence and arousal in affective words
No full textPsychological frameworks conceptualize emotion along 2 dimensions, "valence" and "arousal." Arousal invokes a single axis of intensity increasing from neutral to maximally arousing. Valence can be described variously as a bipolar continuum, as independent positive and negative dimensions, or as hedonic value (distance from neutral). In this study, we used functional magnetic resonance imaging to characterize neural activity correlating with arousal and with distinct models of valence during presentation of affective word stimuli. Our results extend observations in the chemosensory domain suggesting a double dissociation in which subregions of orbitofrontal cortex process valence, whereas amygdala preferentially processes arousal. In addition, our data support the physiological validity of descriptions of valence along independent axes or as absolute distance from neutral but fail to support the validity of descriptions of valence along a bipolar continuum
Calculation and experimental determination of dimensions of hardening and tempering zones in quenched U7A steel irradiated with a pulsed electron beam
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Effect of nonmetallic and intermetallic inclusions on crater formation on the surface of TiNi alloys under the electron-beam impact
No full textAbstractThe regularities of surface cratering in commercial and precision TiNi alloys irradiated with a low-energy, high-current electron beam (LEHCEB) in dependence on non-metallic (TiC(O)) or intermetallic (Ti2Ni) inclusions presented in TiNi matrix are studied. The melting threshold of TiNi alloy was found to be achieved in the range of LEHCEBs energy density Es corresponding to 1.3-1.5 J/cm2. The dominant role of non-metallic inclusions [mainly, TiC(O)] in the nucleation of microcraters was found. The processes initiated by pulsed heating/melting near the inclusion/matrix interface were analyzed. It is proposed that the most important factor enabling the liquid-phase dissolution of inclusions and delivery of impurities of C and O [from TiC(O)] and O (from Ti4Ni2Ox) into TiNi melt are eutectic reactions taking place in the Ti-Ni-C and Ti-Ni-O systems near Ti50Ni50 composition
Physical foundations for surface treatment of materials with low energy, high current electron beams
No full textAn ion-plasma technique for formation of anode-supported thin electrolyte films for IT-SOFC applications
No full textHv hold-off of large surface area stainless steel electrodes with pulsed electron beam treatment
No full textSurface structure and physicomechanical properties of NiTi exposed to electron beam and ion-plasma treatment
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