Productivity indices and survival rate estimates from MAPS,a continent-wide programme of constant-effort mist-netting in North America

The Monitoring Avian Productivity and Survivorship (MAPS) programme is a cooperative effort to provide annual regional indices of adult population size and post-fledging productivity and estimates of adult survival rates from data pooled from a network of constant-effort mist-netting stations across North America. This paper provides an overview of the field and analytical methods currently employed by MAPS, a discussion of the assumptions underlying the use of these techniques, and a discussion of the validity of some of these assumptions based on data gathered during the first 5 years (1989-1993) of the programme, during which time it grew from 17 to 227 stations. Ageand species-specific differences in dispersal characteristics are important factors affecting the usefulness of the indices of adult population size and productivity derived from MAPS data. The presence of transients, heterogeneous capture probabilities among stations, and the large sample sizes required by models to deal effectively with these two considerations are important factors affecting the accuracy and precision of survival rate estimates derived from MAPS data. Important results from the first 5 years of MAPS are: (1) indices of adult population size derived from MAPS mist-netting data correlated well with analogous indices derived from point-count data collected at MAPS stations; (2) annual changes in productivity indices generated by MAPS were similar to analogous changes documented by direct nest monitoring and were generally as expected when compared to annual changes in weather during the breeding season; and (3) a model using between-year recaptures in Cormack-Jolly-Seber (CJS) mark-recapture analyses to estimate the proportion of residents among unmarked birds was found, for most tropical-wintering species sampled, to provide a better fit with the available data and more realistic and precise estimates of annual survival rates of resident birds than did standard CJS mark-recapture analyses. A detailed review of the statistical characteristics of MAPS data and a thorough evaluation of the field and analytical methods used in the MAPS programme are currently under way.     

The right tool for the job: problems and solutions in visualizing sociological theory

The visualization of social theory is an important part of the development and communication of our theoretical ideas. While most theorists use figures of some kind, few if any have formal training, or guiding rules or principles for the representation of theory. This has often led to poor visualization efforts, and the visual culture of sociology continues to lag behind the natural sciences. The intent of this paper is to serve as a practical and empirically aided guide for social theorists, by providing insights surrounding the cognitive and perceptual properties of certain elements and figures. Through these properties we identify four major problems in theory visualization: vagueness, reduction, unwanted spatial inferences and unwanted metaphorical inferences. We offer solutions to these problems, and to improving theory visualization more generally. Our hope is that this paper will serve as a resource for more thoughtful and informed visualization for practicing social theorists.     

On the Integration of Science and Practice in College Health

Abstract

College health professionals want to assure the unique healthcare and health education needs of college students will continue to be met under national and state healthcare reform. This may be an “all or nothing” proposition. Either colleges and universities will have exclusive control of healthcare delivery for the college student population or else college health will not be a major force in healthcare reform. If college health is to play a meaningful role in future government-controlled health insurance programs, it must first demonstrate that current health services and insurance financing programs meet minimum quality standards. This proposal calls for expanding existing federal laws to create qualified student health plans and integrating the college health model into a reform package based on employer-sponsored health insurance. The concept of qualified student health plans allows for a high degree of flexibility that can be integrated into the majority of state and federal healthcare reform proposals, including the plan proposed by President Clinton, that are not based on a single-payer system. Ultimately, the authors suggest, their proposed plan would eliminate the current situation, in which large numbers of college students are uninsured or underinsured.     

Promoting Self-Efficacy and Self-Esteem for Multiethnic Sexual Minority Youth: An Evidence-Informed Intervention

ABSTRACT

Sexual minority youth face multiple challenges, yet research regarding evidence-informed practice strategies for this population is limited. This study describes the pilot efforts of Strengths First, the first strengths-based intervention created specifically to promote self-esteem and self-efficacy among multiethnic sexual minority youth. A pretest–posttest design was used to gather preliminary data from program participants (n = 162) about the potential effectiveness of the program during a 2-year period that ranged from the inception of the program in June 2008 to September 2010. Significant increases in self-esteem and self-efficacy were found. Implications for social service research and practice are discussed.     

On the multiple frontiers of extraction: excavating contemporary capitalism

Understanding the intensification and expansion of extractive industries in contemporary capitalism requires an approach attentive not only to the literal forms of extraction prevalent in mining and agribusiness but also to new fronts of extraction emerging in activities such as data mining and biocapitalism. This article introduces the concept of operations of capital to trace connections between the expansive logic of extraction and capitalist activity in the domains of logistics and finance. Arguing that extractive operations are at large across these domains, we explore their relevance for capital’s relation with its multiple outsides. The resulting analysis provides a basis for mapping struggles against the changing forms of dispossession and exploitation enabled by extraction.     

Leukemia Risk Associated with Benzene Exposure in the Pliofilm Cohort: I. Mortality Update and Exposure Distribution

The National Institute of Occupational Safety and Health (NIOSH) recently completed a vital status update adding 6 years of observation on the rubber workers known as the Pliofilm cohort. Using traditional standardized mortality ratio (SMR) analysis, we investigate the impact of the additional information gathered in the NIOSH update. We also compare the effect of using three sets of job-, plant-, and year-specific exposure estimates on the evaluation of benzene's leukemogenicity. The lack of any additional cases of multiple myeloma does not support trends toward elevated risks for this endpoint (as had been observed earlier), and there is no indication of increased incidences of solid tumors (as predicted by animal studies). Qualitatively, which exposure estimates are used does not alter the conclusions. The data added in the update did not greatly modify the estimated relative risk of leukemia associated with benzene exposure, but did confirm previous findings that occupational exposure to high concentrations had leukemogenic potential. The fact that leukemia has not been observed in any individual who started employment in Pliofilm production after 1950 suggests that the observed leukemia cases could be a response to very high levels of benzene exposure that occurred during the early years of this manufacturing process.     

The Treadmill of Destruction and the Environmental Impacts of Militaries1

This brief article considers the environmental impacts of militaries from a sociological perspective. The authors begin with an overview of treadmill of destruction theory, which highlights the expansionary tendencies and concomitant environmental consequences of militarism. This discussion is followed by a narrative assessment of military developments and expenditures, with a particular focus on the US military over the past century. Next, the authors detail the increasing environmental impacts associated with the growth and structure of militarization, and conclude by calling for future sociological research to seriously consider the environmental impacts of the world’s militaries.     

Does Educational Similarity Drive Parental Support?

This article tests competing mechanisms explaining linkages between parent–child educational similarity and parental advice and interest to adult children, asking whether mechanisms differ for mothers and fathers. Educational similarities might provide common ground whereas educational dissimilarity affects parents' authority to dispense advice. Using ordered logistic regression with data from the Netherlands Kinship Panel Study (N = 2,444) parental advice and interest are modeled separately for mothers and fathers. Seemingly unrelated estimation is used to test for gender differences across models, revealing that mechanisms driving parental support differ by parents' gender. Fathers show more interest in adult children when they are educationally similar (consistent with the homophily hypothesis), but only among the highly educated, whereas mothers show more interest to highly educated children, regardless of their own level of educational attainment. Fathers' advice is conditioned on their own educational attainment whereas mothers give advice unconditionally (consistent with the gender hypothesis).