Oral Health and Hygiene Content in Nursing Fundamentals Textbooks

The purpose of this paper is to describe the quantity and quality of oral hygiene content in a representative sample of before-licensure nursing fundamentals textbooks. Seven textbooks were examined. Quantity was operationalized as the actual page count and percentage of content devoted to oral health and hygiene. Quality of content was operationalized as congruency with best mouth care practices. Best mouth care practices included evidence-based and consensus-based practices as published primarily by the American Dental Association and supported by both published nursing research and review articles specific to mouth care and published dental research and review articles specific to mouth care. Content devoted to oral health and hygiene averaged 0.6%. Although the quality of the content was highly variable, nearly every textbook contained some erroneous or outdated information. The most common areas for inaccuracy included the use of foam sponges for mouth care in dentate persons instead of soft toothbrushes and improper denture removal

Optical Monitoring of Quasars: I. Variability

We present an analysis of quasar variability from data collected during a photometric monitoring of 50 objects carried out at CNPq/Laboratorio Nacional de Astrofisica, Brazil, between March 1993 and July 1996. A distinctive feature of this survey is its photometric accuracy, ~ 0.02 V mag, achieved through differential photometry with CCD detectors, what allows the detection of faint levels of variability. We find that the relative variability, delta = sigma / L, observed in the V band is anti-correlated with both luminosity and redshift, although we have no means of discovering the dominant relation, given the strong coupling between luminosity and redshift for the objects in our sample.We introduce a model for the dependence of quasar variability on frequency that is consistent with multi-wavelength observations of the nuclear variability of the Seyfert galaxy NGC 4151. We show that correcting the observed variability for this effect slightly increases the significance of the trends of variability with luminosity and redshift. Assuming that variability depends only on the luminosity, we show that the corrected variability is anti-correlated with luminosity and is in good agreement with predictions of a simple Poissonian model. The energy derived for the hypothetical pulses, ~ 10^50 erg, agrees well with those obtained in other studies. We also find that the radio-loud objects in our sample tend to be more variable than the radio-quiet ones, for all luminosities and redshifts.Comment: 17 pages, 12 figures, accepted for publication in MNRAS (uses MNRAS style

Unicorns: Past, Present and in the Imagination

In the last few thousand years, unicorn folklore has extensively evolved. In fact, the evolution of the mentioned above mythical creature has been so drastic, that the original unicorn lore of the Greek, Roman and early Christian people, would be unrecognizable to a modern day person. Consequently, to the historical figures (such as Julius Caesar and Ctesias) that contributed to the creation of the mythical creature, they would not recognize the unicorn as it is found in My Little Pony or any other pop culture sensation. To discover the cause of disconnect between the folkloric and pop culture unicorns, an in depth look at the unicorn’s journey from historic to modern times, will be evaluated. Specifically the original creation of the creature, Christian influence, the cultural diffusion that has led to hybrid creatures such as the pegacorn, unipeg, and alicorns,will all be examined. Then finally, the changes that the unicorn has underwent, will be used to lead up to an explanation on how these folkloric animals became the gentle /horrifying unicorns of modern children’s entertainment

Reconstruction Error and Principal Component Based Anomaly Detection in Hyperspectral imagery

The rapid expansion of remote sensing and information collection capabilities demands methods to highlight interesting or anomalous patterns within an overabundance of data. This research addresses this issue for hyperspectral imagery (HSI). Two new reconstruction based HSI anomaly detectors are outlined: one using principal component analysis (PCA), and the other a form of non-linear PCA called logistic principal component analysis. Two very effective, yet relatively simple, modifications to the autonomous global anomaly detector are also presented, improving algorithm performance and enabling receiver operating characteristic analysis. A novel technique for HSI anomaly detection dubbed multiple PCA is introduced and found to perform as well or better than existing detectors on HYDICE data while using only linear deterministic methods. Finally, a response surface based optimization is performed on algorithm parameters such as to affect consistent desired algorithm performance

Environmental Equity: Gradient Measures of Race and Social Class in the Areas Surrounding Pennsylvania Superfund Sites

This study examines the socioeconomic and racial characteristics of the areas surrounding the 120 National Priority List Superfund hazardous waste sites in the Commonwealth of Pennsylvania. Using three distinct concentric distance measures, the study uses 1990 census tract data to determine whether Nonwhite and low-income populations live in closest proximity to Pennsylvania\u27s most toxic sites and consequently bear the brunt of the negative externalities associated with having Superfund sites nearby. The results of the study suggest that environmental inequities are not prevalent in the areas surrounding Pennsylvania Superfund sites. Rather, the areas between 1.667 and 3.333 miles away from the sites were found to be significantly more affluent than all other areas in Pennsylvania. One key variable, Nonwhites below the poverty level, showed results consistent with the claims of environmental justice advocates, thus signifying a band of poor residents within the overall more affluent population