1,782 research outputs found
A Brief History of the University of North Florida
A brief overview of the University of North Florida beginning in 1965, written by J. Phillip Murphy, Office of Public Relations
Five year prognosis in patients with angina identified in primary care : incident cohort study
Peer reviewedPublisher PD
Anderson et al. Reply (to the Comment by Murphy on Pioneer 10/11)
We conclude that Murphy's proposal (radiation of the power of the main-bus
electrical systems from the rear of the craft) can not explain the anomalous
Pioneer acceleration.Comment: LaTex, 3 pages, Phys. Rev. Lett. (to be published
Evaluation of In Vitro Virulence Characteristics of the Genus Pandoraea in Lung Epithelial Cells
Pandoraea species are emerging opportunistic pathogens capable of causing chronic lung infections in cystic fibrosis patients. This study examined the interactions of 17 Pandoraea isolates from the five identified species (Pandoraea apista, Pandoraea norimbergensis, Pandoraea pulmonicula, Pandoraea sputorum and Pandoraea pnomenusa) plus two Pandoraea genomospecies isolates with lung epithelial cells and their ability to form biofilms in vitro. Only three isolates showed an ability to invade A549 lung epithelial cells, and only one isolate was able to form biofilms. In contrast, all isolates triggered a pronounced pro-inflammatory response, with elevation of both interleukin (IL)-6 (two- to 19-fold) and IL-8 (10- to 50-fold) above that observed for a control strain of Escherichia coli. This property is likely to be a major factor in the pathogenesis of the genus
Disgust Enhances the Recollection of Negative Emotional Images
Memory is typically better for emotional relative to neutral images, an effect generally considered to be mediated by arousal. However, this explanation cannot explain the full pattern of findings in the literature. Two experiments are reported that investigate the differential effects of categorical affective states upon emotional memory and the contributions of stimulus dimensions other than pleasantness and arousal to any memory advantage. In Experiment 1, disgusting images were better remembered than equally unpleasant frightening ones, despite the disgusting images being less arousing. In Experiment 2, regression analyses identified affective impact – a factor shown previously to influence the allocation of visual attention and amygdala response to negative emotional images – as the strongest predictor of remembering. These findings raise significant issues that the arousal account of emotional memory cannot readily address. The term impact refers to an undifferentiated emotional response to a stimulus, without requiring detailed consideration of specific dimensions of image content. We argue that ratings of impact relate to how the self is affected. The present data call for further consideration of the theoretical specifications of the mechanisms that lead to enhanced memory for emotional stimuli and their neural substrates
Deep Near-Infrared Observations of L1014: Revealing the nature of the core and its embedded source
Recently, the Spitzer Space Telescope discovered L1014-IRS, a mid-infrared
source with protostellar colors, toward the heretofore "starless" core L1014.
We present deep near-infrared observations that show a scattered light nebula
extending from L1014-IRS. This nebula resembles those typically associated with
protostars and young stellar objects, tracing envelope cavities presumably
evacuated by an outflow. The northern lobe of the nebula has an opening angle
of ~100 degrees, while the southern lobe is barely detected. Its morphology
suggests that the bipolar cavity and inferred protostellar disk is not inclined
more than 30 degrees from an edge-on orientation. The nebula extends at least
8" from the source at Ks, strongly suggesting that L1014-IRS is embedded within
L1014 at a distance of 200 pc rather than in a more distant cloud associated
with the Perseus arm at 2.6 kpc. In this case, the apparently low luminosity of
L1014-IRS, 0.090 Lsun, is consistent with it having a substellar mass. However,
if L1014-IRS is obscured by a circumstellar disk, its luminosity and inferred
mass may be greater. Using near-infrared colors of background stars, we
investigate characteristics of the L1014 molecular cloud core. We determine a
mass of 3.6 Msun for regions of the core with Av > 2 magnitudes. A comparison
of the radial extinction profile of L1014 with other cores suggests that L1014
may be among the most centrally condensed cores known, perhaps indicative of
the earliest stages of brown dwarf or star formation processes.Comment: Replacement includes revision to mass of core. 22 pages, 6 figures.
Accepted by Ap
Short-term serotonergic but not noradrenergic antidepressant administration reduces attentional vigilance to threat in healthy volunteers
Anxiety is associated with threat-related biases in information processing such as heightened attentional vigilance to potential threat. Such biases are an important focus of psychological treatments for anxiety disorders. Selective serotonin reuptake inhibitors (SSRIs) are effective in the treatment of a range of anxiety disorders. The aim of this study was to assess the effect of an SSRI on the processing of threat in healthy volunteers. A selective noradrenergic reuptake inhibitor (SNRI), which is not generally used in the treatment of anxiety, was used as a contrast to assess the specificity of SSRI effects on threat processing. Forty-two healthy volunteers were randomly assigned to 7 d double-blind intervention with the SSRI citalopram (20 mg/d), the SNRI reboxetine (8 mg/d), or placebo. On the final day, attentional and interpretative bias to threat was assessed using the attentional probe and the homograph primed lexical decision tasks. Citalopram reduced attentional vigilance towards fearful faces but did not affect the interpretation of ambiguous homographs as threatening. Reboxetine had no significant effect on either of these measures. Citalopram reduces attentional orienting to threatening stimuli, which is potentially relevant to its clinical use in the treatment of anxiety disorders. This finding supports a growing literature suggesting that an important mechanism through which pharmacological agents may exert their effects on mood is by reversing the cognitive biases that characterize the disorders that they treat. Future studies are needed to clarify the neural mechanisms through which these effects on threat processing are mediated
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