Ambient ammonia measurements using laser photo-acoustic spectroscopy

Ammonia concentrations reached minimal levels (approximately 0.1 ppb) in early winter, followed by a sudden later winter increase. A direct relationship between ambient ammonia levels and air temperature was inferred from the data (linear correlation coefficient r=0.53). Ammonia concentrations were determined to be directly related to the absolute humidity of the air (r=0.72); a weaker relationship between ammonia concentrations and relative humidity was discovered (r=0.37). The data also indicated that ammonia levels were generally higher within continental air masses than those of maritime origin. Soil parameters such as pH and moisture content were found to have a major bearing on the release of gaseous ammonia from soils in the region

Psychological patterns among Roman Catholic clergy accused of sexual misconduct

A remarkable amount of international attention has focused on the sexual misconduct by Roman Catholic clergy in recent years. While the demographics and risk factor profiles of clergy sex offenders is now fairly well established, the psychological and personality profiles of these men are not. Very few empirical research studies have been published on the psychological and personality functioning of clergy who engage in sexual misconduct in the Catholic Church. The purpose of this study was to investigate the psychological profiles of 21 Roman Catholic clergy who have confronted credible accusations of sexual misconduct. Relative to national norms, MMPI-2 results suggest that these men tend to have profiles that were defensive, repressive, mistrustful, isolative, and irritable. Precautions and limitations of the current study, as well as implications for future research are offered

Are successful applicants to the priesthood psychologically healthy?

The current investigation evaluated psychological and personality profiles of successful applicants to a major Roman Catholic religious order. The MMPI-2 and 16PF were administered to 68 applicants between 1990 and 2004 who subsequently entered seminary. Results indicate that these applicants to the priesthood were generally well-adjusted as well as being socially responsible, interpersonally sensitive and sociable. Findings also suggest some tendency for defensiveness and repression. Furthermore, dealing with perceived negative impulses such as anger and hostility may also be a concern for many of these men

Applications of graphics to support a testbed for autonomous space vehicle operations

Researchers describe their experience using graphics tools and utilities while building an application, AUTOPS, that uses a graphical Machintosh (TM)-like interface for the input and display of data, and animation graphics to enhance the presentation of results of autonomous space vehicle operations simulations. AUTOPS is a test bed for evaluating decisions for intelligent control systems for autonomous vehicles. Decisions made by an intelligent control system, e.g., a revised mission plan, might be displayed to the user in textual format or he can witness the effects of those decisions via out of window graphics animations. Although a textual description conveys essentials, a graphics animation conveys the replanning results in a more convincing way. Similarily, iconic and menu-driven screen interfaces provide the user with more meaningful options and displays. Presented here are experiences with the SunView and TAE Plus graphics tools used for interface design, and the Johnson Space Center Interactive Graphics Laboratory animation graphics tools used for generating out out of the window graphics

Siren songs or path to salvation? Interpreting the visions of web technology at a UK regional newspaper in crisis, 2006-11

A 5-year case study of an established regional newspaper in Britain investigates journalists about their perceptions of convergence in digital technologies. This research is the first ethnographic longitudinal case study of a UK regional newspaper. Although conforming to some trends observed in the wider field of scholarship, the analysis adds to skepticism about any linear or directional views of innovation and adoption: the Northern Echo newspaper journalists were observed to have revised their opinions of optimum Web practices, and sometimes radically reversed policies. Technology is seen in the period as a fluid, amorphous entity. Central corporate authority appeared to diminish in the period as part of a wider reduction in formalism. Questioning functionalist notions of the market, the study suggests cause and effect models of change are often subverted by contradictory perceptions of particular actions. Meanwhile, during technological evolution, the ‘professional imagination’ can be understood as strongly reflecting the parent print culture and its routines, despite pioneering a new convergence partnership with an independent television company

Long-term population dynamics of dreissenid mussels (Dreissena polymorpha and D. rostriformis): a cross-system analysis

Dreissenid mussels (including the zebra mussel Dreissena polymorpha and the quagga mussel D. rostriformis) are among the world's most notorious invasive species, with large and widespread ecological and economic effects. However, their long-term population dynamics are poorly known, even though these dynamics are critical to determining impacts and effective management. We gathered and analyzed 67 long-term (>10 yr) data sets on dreissenid populations from lakes and rivers across Europe and North America. We addressed five questions: (1) How do Dreissena populations change through time? (2) Specifi- cally, do Dreissena populations decline substantially after an initial outbreak phase? (3) Do different measures of population performance (biomass or density of settled animals, veliger density, recruitment of young) follow the same patterns through time? (4) How do the numbers or biomass of zebra mussels or of both species combined change after the quagga mussel arrives? (5) How does body size change over time? We also considered whether current data on long-term dynamics of Dreissena populations are adequate for science and management. Individual Dreissena populations showed a wide range of temporal dynamics, but we could detect only two general patterns that applied across many populations: (1) Populations of both species increased rapidly in the first 1-2 yr after appearance, and (2) quagga mussels appeared later than zebra mussels and usually quickly caused large dedines in zebra mussel populations. We found little evidence that combined Dreissena populations declined over the long term. Different measures of population performance were not congruent; the temporal dynamics of one life stage or population attribute cannot generally be accurately inferred from the dynamics of another. We found no consistent patterns in the long-term dynamics of body size. The long-term dynamics of Dreissena populations probably are driven by the ecological characteristics (e.g., predation, nutrient inputs, water temperature) and their temporal changes at individual sites rather than following a generalized time course that applies across many sites. Existing long-term data sets on dreissenid populations, although dearly valuable, are inadequate to meet research and management needs. Data sets could be improved by standardizing sampling designs and methods, routinely collecting more variables, and increasing support

Book Reviews

Reproductive Biology and Phylogeny of Lizards and Tuatara. J. L. Rheubert, D. S. Siegel, and S. E. Trauth (Eds.). 2014. CRC Press. ISBN 9781466579866. 760 p. $143.96 (hardcover).— According to the authors, this book was intended to summarize the current knowledge of phylo- geny and reproduction of the Lepidosauria. I believe the authors have achieved their goal. Many of the chapters in this book are derived from presentations that took place at the Symposium on Reproductive Biology of Lizards at the Joint Meeting of Ichthyologists and Herpetologists held in Chattanooga, Tennessee in 2014. Although the majority of the authors are from the United States, the book includes authors from nine countries representing four continents and New Zealand. In the first chapter, Laurie Vitt states (p. 1), “It is difficult to imagine anything more interesting to biologists... than understanding the origins of reproductive patterns among lizards.” I agree. Vitt continues with the early history of topics such as seasonality of reproduction and fat storage, parthenogenesis, evolution of viviparity, placentation, and several other topics. For each of these topics, Vitt explains the origin of the field and the major researchers responsible for the insights and hypotheses in each field. His chapter ends with a call for natural history studies. In chapter two, John Wiens and Shea Lambert discuss the phylogeny of lizard families. They present a compelling argument for combining molecular and morphological data sets in phylogenetic studies. The authors admit that there are still many unresolved issues and more data are needed to fully understand the phylogeny of the lizards. In chapter three, Jose ́ Mart ́ın and Pilar Lo ́ pez define pheromone, discuss chemosensory abilities, and describe the role of pheromones in lizard reproduction. They present a list of studies on lizards and Tuatara, describe the source of chemicals, and the chemical nature of putative phero- mones. Mart ́ın and Lo ́pez conclude with the evolutionary origin of chemical signaling in lizards and a call for additional work on pheromone communication in lizards. Robert Cox and Atiel Kahrl discuss sexual selection and sexual dimorphism in lizards in chapter four. They include a list of studies and evaluate the data to determine what factors led to sexual dimorphism. They discuss intra- and intersexual selection. Cox and Kahrl discuss the ultimate cause and proximate mechanisms for sexual dimorphism and conclude with a discussion of the consequence of sexual selection on speciation and species recognition