Characterization of plankton from the Galveston estuary

The purpose of this report is to summarize the published studies on phytoplankton and zooplankton in the Galveston Estuary. Before this project had begun, it was determined that there was insufficient long term data on plankton in the Galveston Estuary to attempt trend analysis. Information on phytoplankton species diversity, biomass and primary production, along with information on zooplankton species diversity and abundance, is summarized. This information is compared to similar data on other Texas and United States estuaries where available. Recommendations for a long term monitoring program are made. A bibliography of all Galveston Estuary plankton studies and an annotated bibliography of the major studies and publications are available in the GBNEP Information Center.Marine Scienc

Ghana’s National Health Insurance Scheme in the Context of the Health MDGs – An Empirical Evaluation Using Propensity Score Matching

In 2003 the Government of Ghana established a National Health Insurance Scheme (NHIS) to improve health care access for Ghanaians and eventually replace the cashand- carry system. This study evaluates the NHIS to determine whether it is fulfi lling its purpose in the context of the Millennium Development Goals #4 and #5 which deal with the health of women and children. We use Propensity Score Matching techniques to balance the relevant background characteristics in our survey data and compare health outcomes of recent mothers who are enrolled in the NHIS with those who are not. Our fi ndings suggest that NHIS women are more likely to receive prenatal care, deliver at a hospital, have their deliveries attended by trained health professionals, and experience less birth complications. We conclude that NHIS is an eff ective tool for increasing health care access, and improving health outcomes.Health insurance, prenatal care, Millennium Development Goals, Propensity Score Matching

Do Trends Matter? The Effects of Dynamic Performance Trends and Personality Traits on Performance Appraisals

©Academy of Management, 2018. This paper is not the copy of record and may not exactly replicate the authoritative document published in Academy of Management Discoveries. Please do not copy or cite without author's permission. The final article is available, upon publication, at: https://doi.org/10.5465/amd.2016.0072This research was funded in part by the the Social Sciences and Humanities Research Council of Canada (# 430-2014-00383).Two studies were conducted to understand how people make overall performance judgments based on dynamic performance trend information and the personality characteristics of ratees. University athletes were sampled in Study 1 and the results showed that improving performance trends resulted in higher appraisals of task performance. Contrary to previous experimental research, raters did not use trend information to make attributions about the targets’ effort or other behavioral characteristics. There were also interactions between performance trends and personality: performance trends were positively associated with task performance ratings for players with high extraversion and low agreeableness, while trends were unrelated to ratings for players at the opposite end of the continuum for these traits. The second study was an experiment designed to test the potential theoretical mechanisms that explained the effects observed in Study 1. The results showed that raters used performance trend information to derive task performance ratings, while they used personality information to derive ratings of citizenship behavior. Attributions about employee effort and ability were based on both performance trends and personality. The results also indicated that raters engaged in more deliberative (controlled) cognitive processing when the target’s personality and performance trend were incongruent, which may explain the interaction effects observed in Study 1. Implications for theories of social cognition and performance appraisal are discussed

Spectral properties of the nonspherically decaying radiation generated by a rotating superluminal source

The focusing of the radiation generated by a polarization current with a superluminally rotating distribution pattern is of a higher order in the plane of rotation than in other directions. Consequently, our previously published asymptotic approximation to the value of this field outside the equatorial plane breaks down as the line of sight approaches a direction normal to the rotation axis, i.e., is nonuniform with respect to the polar angle. Here we employ an alternative asymptotic expansion to show that, though having a rate of decay with frequency (mu) that is by a factor of order mu^(2/3) slower, the equatorial radiation field has the same dependence on distance as the nonspherically decaying component of the generated field in other directions: it, too, diminishes as the inverse square root of the distance from its source. We also briefly discuss the relevance of these results to the giant pulses received from pulsars: the focused, nonspherically decaying pulses that arise from a superluminal polarization current in a highly magnetized plasma have a power-law spectrum (i.e., a flux density proportional to mu^alpha) whose index (alpha) is given by one of the values -2/3, -2, -8/3, or -4