58 research outputs found
Height Perception of Bed Bugs, \u3cem\u3eCimex lectularius\u3c/em\u3e
It has been demonstrated that there is no significant difference in Bed bug preference for colored columns of two heights and that Bed bugs tend to hide in harborages when not stimulated. More information, however, is still needed on their visual perception and general behavior. The following study investigated height perception of Bed bugs by determining the total number of bugs that migrated toward Bed bug interceptors representing different elevations over several trials. A significant difference was found between the number of bugs that migrated toward the control and experimental elevations (3”, 6”, 9”) and the number that migrated toward the general arena area. In addition, it was observed that Bed bugs like aggregating together and prefer secluded areas and dark places. They were also found to be weaker than expected. The results of this study revealed the need to continue learning more about Bed bug behavior and senses
Control of star formation by supersonic turbulence
Understanding the formation of stars in galaxies is central to much of modern
astrophysics. For several decades it has been thought that stellar birth is
primarily controlled by the interplay between gravity and magnetostatic
support, modulated by ambipolar diffusion. Recently, however, both
observational and numerical work has begun to suggest that support by
supersonic turbulence rather than magnetic fields controls star formation. In
this review we outline a new theory of star formation relying on the control by
turbulence. We demonstrate that although supersonic turbulence can provide
global support, it nevertheless produces density enhancements that allow local
collapse. Inefficient, isolated star formation is a hallmark of turbulent
support, while efficient, clustered star formation occurs in its absence. The
consequences of this theory are then explored for both local star formation and
galactic scale star formation. (ABSTRACT ABBREVIATED)Comment: Invited review for "Reviews of Modern Physics", 87 pages including 28
figures, in pres
Longitudinal assessment of cognitive and psychosocial functioning after Hurricanes Katrina and Rita: Exploring disaster impact on middle-aged, older, and oldest-old adults
The authors examined the effects of Hurricanes Katrina and Rita on cognitive and psychosocial functioning in a lifespan sample of adults 6-14 months after the storms. Participants were recruited from the Louisiana Healthy Aging Study. Most were assessed during the immediate impact period and retested for this study. Analyses of pre- and post-disaster cognitive data confirmed that storm-related decrements in working memory for middle-aged and older adults observed in the immediate impact period had returned to pre-hurricane levels in the post-disaster recovery period. Middle-aged adults reported more storm-related stressors and greater levels of stress than the two older groups at both waves of testing. These results are consistent with a burden perspective on post-disaster psychological reactions. © 2012 Wiley Periodicals, Inc
Keep off the grass?:Cannabis, cognition and addiction
This is the author accepted manuscript. The final version is available from the publisher via the DOI in this record.In an increasing number of states and countries, cannabis now stands poised to join alcohol and tobacco as a legal drug. Quantifying the relative adverse and beneficial effects of cannabis and its constituent cannabinoids should therefore be prioritized. Whereas newspaper headlines have focused on links between cannabis and psychosis, less attention has been paid to the much more common problem of cannabis addiction. Certain cognitive changes have also been attributed to cannabis use, although their causality and longevity are fiercely debated. Identifying why some individuals are more vulnerable than others to the adverse effects of cannabis is now of paramount importance to public health. Here, we review the current state of knowledge about such vulnerability factors, the variations in types of cannabis, and the relationship between these and cognition and addiction.This work was supported by grants from the US National Institutes of Health to L.H.P. (AA020404, AA006420, AA022249 and AA017447) and by grants from the UK Medical Research Council to H.V.C. and C.J.A.M. (G0800268; MR/K015524/1)
Change In Financial Stress and Relational Wellbeing During COVID-19: Exacerbating and Alleviating Influences
Guided by the family adjustment and adaptation response (FAAR) model and using a panel survey of 1510 adults in the US administered during the summer of 2020 and a mixed methods approach, we explored associations between changes in financial stress related to COVID-19 and relational wellbeing. Regression analyses showed that, compared to those who maintained their levels of financial stress, those who reported increased financial stress reported increased conflict and those who reported decreased financial stress reported decreased conflict. However, decreased financial stress was also associated with decreases in emotional closeness and relationship happiness, suggesting that changes in financial stress can lead to both maladaptation and bonadaptation in families. Qualitative findings provide insights into factors that may exacerbate or help alleviate financial stress related to COVID-19
Fourth Dawson College of Fine Arts Faculty Biennial
This exhibition catalogue contains documentation of works by 26 artists, accompanied by brief artist's statements and various quotations. 7 bibl. ref
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