Resource allocation in a university environment : a test of the Ruefli, Freeland, and Davis goal programming decomposition algorithms / BEBR No. 735

Bibliography: p. 20-22

Cross‐modal symbolic processing can elicit either an N2 or a protracted N2/N400 response

"This is the pre-peer reviewed version of the following article: Griffiths, O., Le Pelley, M. E., Jack, B. N., Luque, D., & Whitford, T. J. (2016). Cross-modal symbolic processing can elicit either an N2 or a protracted N2/N400 response. Psychophysiology, 53(7), 1044–1053. https://doi.org/10.1111/psyp.12649 , which has been published in final form at https://doi.org/10.1111/psyp.12649. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions."A cross‐modal symbolic paradigm was used to elicit EEG activity related to semantic incongruence. Twenty‐five undergraduate students viewed pairings of visual lexical cues (e.g., DOG) with congruent (50% of trials) or incongruent (50%) auditory nonlexical stimuli (animal vocalizations; e.g., sound of a dog woofing or a cat meowing). In one condition, many different pairs of congruent/incongruent stimuli were shown, whereas in a second condition only two pairs of stimuli were repeatedly shown. A typical N400‐like pattern of incongruence‐related activity (including activity in the N2 time window) was evident in the condition using many stimuli, whereas the incongruence‐related activity in the two‐stimuli condition was confined to differential N2‐like activity. A supplementary analysis excluded stimulus characteristics as the source of this differential activity between conditions. We found that a single individual performing a fixed task can demonstrate either a protracted N400‐like pattern of activity or a more temporally focused N2‐like pattern of activity in response to the same stimulus, which suggests that the N2 may be a precursor to the protracted N400 response

Long-lived explosive volcanism on Mercury

The duration and timing of volcanic activity on Mercury are key indicators of the thermal evolution of the planet and provide a valuable comparative example for other terrestrial bodies. The majority of effusive volcanism on Mercury appears to have occurred early in the planet's geological history (~4.1–3.55 Ga), but there is also evidence for explosive volcanism. Here we present evidence that explosive volcanism occurred from at least 3.9 Ga until less than a billion years ago and so was substantially more long-lived than large-scale lava plains formation. This indicates that thermal conditions within Mercury have allowed partial melting of silicates through the majority of its geological history and that the overall duration of volcanism on Mercury is similar to that of the Moon despite the different physical structure, geological history, and composition of the two bodies

Dynamic Changes in Brain Functional Connectivity during Concurrent Dual-Task Performance

This study investigated the spatial, spectral, temporal and functional proprieties of functional brain connections involved in the concurrent execution of unrelated visual perception and working memory tasks. Electroencephalography data was analysed using a novel data-driven approach assessing source coherence at the whole-brain level. Three connections in the beta-band (18–24 Hz) and one in the gamma-band (30–40 Hz) were modulated by dual-task performance. Beta-coherence increased within two dorsofrontal-occipital connections in dual-task conditions compared to the single-task condition, with the highest coherence seen during low working memory load trials. In contrast, beta-coherence in a prefrontal-occipital functional connection and gamma-coherence in an inferior frontal-occipitoparietal connection was not affected by the addition of the second task and only showed elevated coherence under high working memory load. Analysis of coherence as a function of time suggested that the dorsofrontal-occipital beta-connections were relevant to working memory maintenance, while the prefrontal-occipital beta-connection and the inferior frontal-occipitoparietal gamma-connection were involved in top-down control of concurrent visual processing. The fact that increased coherence in the gamma-connection, from low to high working memory load, was negatively correlated with faster reaction time on the perception task supports this interpretation. Together, these results demonstrate that dual-task demands trigger non-linear changes in functional interactions between frontal-executive and occipitoparietal-perceptual cortices

The generalized hierarchical model : a new approach to resource allocation within multilevel organizations / BEBR No. 797

Cover misspelled Wayne J. David as co-author.Bibliography: p. 41-43

A comparative investigation of mathematical models for resource allocation in an organization / BEBR No. 734

Bibliography: p. 28-29

On the optimality of the modified generalized goal decomposition model : a numerical example

Includes bibliographical references (p. 13)

On the nonoptimality of three-level goal programming composition models

Bibliography: p. 29

The impacts of options' expiration, unanticipated inflation, errors in forecasted earnings, and trading volume on daily market returns / BEBR No. 746

Includes bibliographical references