Washington Research Library Consortium - Digital Collections
Not a member yet
125665 research outputs found
Sort by
Gabrielle Munter: The Forgotten Expressionist
No full textResearch paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis optio
Power and Eroticism in the Art of Lucian Freud
No full textResearch paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis optio
British Impressionism: The Continuing Tradition
No full textResearch paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis optio
The stimulus range effect: Evidence for top-down control of sensory intensity in audition
No full textPublished in: Perception & Psychophysics, 1994, 56 (1), 1-11.The influence of intensity range on the perceived magnitude of a stimulus is well documented
and usually attributed to response biases. Recent studies, however, have suggested that the range
effect might be sensory in origin. To test this notion, we had one set of subjects compare loud-
ness intervals in three conditions: a broad-range condition (15 tones, 23-95 dB SPL), a soft short-
range condition (the lowest 10 tones from the broad-range condition), and a loud short-range condi-
tion ~t~e highe~t 10 .tones).Nonmetric.scaling showed that the broad-range and loud short-range
conditions had identical loudness functions, However, the second derivative ofthe loudnessfunction
was larger for the soft short-range condition than for the broad-range condition. This pattern of
results. is consistent with the notion of a nonlinear amplifier whose gain and degree of nonlinearity
are adjusted under top-down control, so as to prevent distortion and increase discriminability
Relationship between water quality, δ15N, and aspergillosis of Caribbean sea fan corals
No full textPublished in: Marine Ecology Series, 2007, Vol. 343, pp. 123-130.It has been hypothesized that excess nitrogen (N) contributes to coral reef decline by
exacerbating the impact of disease. We tested the relationship between N concentration and the
prevalence and severity of aspergillosis of the sea fan coral Gorgonia ventalina at 9 reefs along the
Florida Keys Reef Tract. Quarterly water quality data, averaged over 1 and 4 yr prior to a disease sur-
vey, were used to examine whether aspergillosis dynamics reflected short- or long-term N concentra-
tions. A positive relationship was detected between prevalence of aspergillosis and long-term total
nitrogen (TN) concentration; in contrast, disease severity was positively related to the ratio between
dissolved inorganic nitrogen and total phosphate (DIN:TP) over both short- and long-terms. These
results may reflect the differential influence of N on the host and pathogen. We also tested whether
N isotope analysis (δ15N) of sea fan coral tissue and skeleton could be used to assess the relative expo-
sure to anthropogenic N inputs and its impact on disease. There was no relationship between δ15N
and aspergillosis (either prevalence or severity). Furthermore, there was no relationship between
δ15N and environmental concentrations of N. It is possible that the source of N (e.g. anthropogenic)
does not affect the dynamics of sea fan aspergillosis, or that the δ15N signatures were suppressed by
agricultural effluents and other N sources, thus confounding our analyses with disease
Does intranasal application of zinc sulfate produce anosmia in mouse?: An olfactometric and anatomical study
No full textPublished in: Chemical Senses, Volume 28, Issue 8, October 2003, Pages 659–670.Mice pre-trained in an olfactometer were tested daily on odor detection and discrimination tasks after irrigation of their olfac-
tory epithelium in each naris with 50 μl of 5% zinc sulfate or saline. Anterograde transport of a wheatgerm agglutinin–horse-
radish peroxidase (WGA-HRP) conjugate from the epithelium to the olfactory bulb was used to assess anatomical connectivity
in these and in mice that were used only for histological analyses. One day after treatment, saline controls performed at high
levels of accuracy in detecting vapor from solutions of 5–0.01% ethyl acetate and in an odor discrimination task but most
ZnSO4-treated mice performed at chance for 5–30 days before showing recovery. Although dense WGA-HRP reaction product
was found in the accessory olfactory bulb, there was little or no evidence for axonal transport to glomeruli of the main olfactory
bulb in the first 4–8 days after treatment. These results demonstrate that intranasal application of ZnSO4 to mice produces a
brief but essentially total disruption of functional connections from the olfactory epithelium to the main olfactory bulb and a
corresponding transient anosmia
Food insecurity and child health
No full textPublished in: Pediatrics October 2019, 144 (4) e20190397.OBJECTIVES: Food insecurity is an important public health problem facing children in the United States. Although a number of previous studies suggest that food insecurity has negative impacts on health, these studies have not dealt thoroughly with issues of selection bias. We use propensity scoring techniques to approximate the causal effects of food insecurity on children’s health and health care use outcomes.
METHODS: We use nationally representative data from the 2013–2016 waves of the National Health Interview Study (N = 29 341). Using inverse probability of treatment weighting, a propensity scoring method, we examine a broad range of child health outcomes and account for a comprehensive set of controls, focusing on a sample of children 2 to 17 years old.
RESULTS: Household food insecurity was related to significantly worse general health, some acute and chronic health problems, and worse health care access, including forgone care and heightened emergency department use, for children. Compared to rates had they not been food insecure, children in food-insecure household had rates of lifetime asthma diagnosis and depressive symptoms that were 19.1% and 27.9% higher, rates of foregone medical care that were 179.8% higher, and rates of emergency department use that were 25.9% higher. No significant differences emerged for most communicable diseases, such as ear infections or chicken pox, or conditions that may develop more gradually, including anemia and diabetes.
CONCLUSIONS: Policies used to reduce household food insecurity among children may also reduce children’s chronic and acute health problems and health care needs
Crawling to a Street Near You; William Pope.L Sets the Pace to Fight Racism
No full textResearch paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis optio
2009-14 INCREASING INEQUALITY, STATUS INSECURITY, IDEOLOGY, AND THE FINANCIAL CRISIS OF 2008
No full textDepartment of Economics, Working Paper Series, no. 2009-14. 37 pages.The current financial crisis has been blamed on inadequate regulation stemming from laissez-faire ideology, combined with low interest rates. But beneath these widely-acknowledged causal factors lies a deeper underlying determining cause that has received less notice: the dramatic increase in inequality in the U.S. over the preceding 35 years. This rise in inequality generated three phenomena that heightened conditions in which this crisis could occur. The first is that greater inequality meant that individuals were forced to struggle harder to find ways to consume more to maintain their relative social status. The consequence was that over the preceding three decades household saving rates plummeted, workers worked longer hours, and households took on ever-greater debt. The second phenomenon is that, flush with ever greater income and wealth, the elite were able to flood financial markets with credit, helping keep interest rates low and encouraging the creation of new credit instruments. The third phenomenon is that, as the rich took larger shares of income and wealth, they gained relatively more command over everything, including ideology. Reducing the size of government, deregulating the economy, and failing to regulate newly evolving credit instruments flowed out of this ideology
2018-06 Long-term shifts in demand and distribution in neo-Kaleckian and neo-Goodwinian models
No full textDepartment of Economics, Working Paper Series, no. 2018-06. 24 pages