Georgia Perimeter College

About: Georgia Perimeter College is a based out in . It is known for research contribution in the topics: Exploratory research & The Internet. The organization has 92 authors who have published 106 publications receiving 1485 citations.

How Could Lay Perspectives on Successful Aging Complement Scientific Theory? Findings From a U.S. and a German Life-Span Sample

Abstract: PURPOSE OF THE STUDY: This article investigates lay perspectives of the concept of successful aging in young, middle-aged, and older adults from 2 cultures, the United States and Germany, to potentially guide the development of scientific theories of successful aging. The empirical findings are embedded in a comprehensive overview of theories of successful aging and life-span development and offer implications for theory development. DESIGN AND METHODS: Two samples of young, middle-aged, and older adults from the United States (N = 151) and Germany (N = 155) were asked about definitions and determinants of successful aging. Codes were developed to capture common themes among the answers, resulting in 16 categories. RESULTS: Themes mentioned included resources (health, social), behaviors (activities), and psychological factors (strategies, attitudes/beliefs, well-being, meaning). There were striking similarities across countries, age, and gender. Health and Social Resources were mentioned most frequently, followed by Activities/Interests, Virtues/Attitudes/Beliefs, Well-being, and Life management/Coping. Age differences were limited to Growth/Maturation and Respect/Success, and gender differences were limited to Social Resources and Well-being. Educational and cultural effects were limited to psychological factors and Education/Knowledge, which were more often mentioned by U.S. participants and individuals with more education. IMPLICATIONS: Young, middle-aged, and older lay persons from the United States and Germany have quite similar concepts of successful aging, which they view in far more multidimensional terms than do established scientific theories (Rowe & Kahn, 1998). Given evidence that factors mentioned by laypeople do promote successful aging, considering them in more comprehensive theoretical models may enhance our understanding.

Emotional Dysregulation and Negative Affect Mediate the Relationship Between Maternal History of Child Maltreatment and Maternal Child Abuse Potential

Abstract: Risk for committing child abuse is frequently attributed to an intergenerational “cycle of violence” through which abuse as a child increases risk for committing abuse as a parent. While this hypothesis has support, more research is needed to understand the factors that account for this pattern of risk. Given literature suggesting that adults with a history of child maltreatment have increased risk for a wide range of psychopathology, this study examined the role of two behavioral endophenotypes, emotional dysregulation and negative affect, in the association between maternal experiences of childhood maltreatment and maternal child abuse potential among 83 low-income, primarily African-American mothers of elementary school age children. Results indicate that a mother’s experience of abuse as a child predicts later risk for abusive parenting as measured by child abuse potential scores. However, our data also indicate that the relationship between maternal experience of child abuse and later child abuse potential is mediated by maternal emotional dysregulation and negative affect.

A 10 kpc SCALE SEYFERT GALAXY OUTFLOW: HST/COS OBSERVATIONS OF IRAS F22456–5125

Abstract: We present analysis of the UV spectrum of the low-z AGN IRAS F22456?5125 obtained with the Cosmic Origins Spectrograph on board the Hubble Space Telescope. The spectrum reveals six main kinematic components, spanning a range of velocities of up to 800?km?s?1, which for the first time are observed in troughs associated with C II, C IV, N V, Si II, Si III, Si IV, and S IV. We also obtain data on the O VI troughs, which we compare to those available from an earlier Far Ultraviolet Spectroscopic Explorer epoch. Column densities measured from these ions allow us to derive a well-constrained photoionization solution for each outflow component. Two of these kinematic components show troughs associated with transitions from excited states of Si II and C II. The number density inferred from these troughs, in combination with the deduced ionization parameter, allows us to determine the distance to these outflow components from the central source. We find these components to be at a distance of ~10?kpc. The distances and the number densities derived are consistent with the outflow being part of a galactic wind.

New Numerical Results for the Surface Quasi-Geostrophic Equation

Abstract: The question whether classical solutions of the surface quasi-geostrophic (SQG) equation can develop finite-time singularities remains open. This paper presents new numerical computations of the solutions to the SQG equation corresponding to several classes of initial data previously proposed by Constantin et al. (Nonlinearity 7:1495---1533, 1994). By parallelizing the serial pseudo-spectral codes through slab decompositions and applying suitable filters, we are able to simulate these solutions with great precision and on large time intervals. These computations reveal detailed finite-time behavior, large-time asymptotics and key parameter dependence of the solutions and provide information for further investigations on the global regularity issue concerning the SQG equation.

Determination of Caffeine Using a Simple Graphite Pencil Electrode with Square-Wave Anodic Stripping Voltammetry

Abstract: A simple commercial graphite pencil electrode (GPE) was utilized for monitoring caffeine using the square-wave anodic stripping voltammetry (SWASV) method. This method was applied to determine the caffeine levels in several tea samples, which yielded a relative error of 1% in the concentrations. Caffeine was deposited at 0.0 V (vs. Ag/AgCl), then reduced at +1.40 V to strip it on the GPE. Optimal experimental conditions for the analysis were found to be as follows: pH value of 9 for the medium; deposition potential of 0.0 V; deposition time of 120 s; SW frequency of 25 Hz; SW amplitude of 45 mV, and step potential of 6 mV. Given these optimum conditions, a linear range was observed within the concentration of 0 ∼ 500 mg L−1. At caffeine concentrations of 50.0, 250.0, and 500.0 mg L−1, the relative standard deviations in measured concentrations (n = 12) were 0.19, 0.09, and 0.11%, respectively. The detection limit was found to be 9.2 mg L−1, which is comparable with the result obtained using a carbon paste electrode, equivalent to 8.2 mg L−1.