Surname analysis for estimating local concentration of Hispanics and Asians

Surname analysis is a potentially useful technique for identifying members of particular racial, ethnic, or language communities within a population. We review the existing state of the art for identifying persons of Hispanic or Asian origin, based on surnames distinctive of each group. We describe the logic of surname analysis, profile several available surname dictionaries, and illustrate their applications in local redistricting. Results of our ongoing validation studies suggest promising future directions for improving accuracy and broadening applications.This article is based on a paper presented at the annual Population Association of America meetings at Cincinnati, 1 April 1993.     

Dynamic booking rules for flights with an intermediate stop

A feasible model has been developed to find the optimal decision rule for allocating seats to passengers seeking to fly on the long or short span of a flight with an intermediate stop from which no boarding rights exist to take passengers to the terminal stop. The model is feasible from the point of view of estimating the data and of computer calculation and memory capacity and is implementable under real life conditions. A computer program was written and a short sample problem was calculated to show the differences in computation time and memory requirements vs the loss of revenue in comparison with a complicated and thus unfeasible higher order model.     

Supporting transgender children: new legal, social, and medical approaches

The author, a lawyer who advocates for transgender children and youth, explores how clinical approaches to transgender children and youth are keeping pace with social and legal changes affecting these young people and with recent evidence suggesting that children are harmed by family and societal rejection as well as by attempts to change their gender identity or gender expression. The author urges providers and legal advocates to work with policymakers and the families of transgender children and youth to create a future in which these young people can reach their full potential and be embraced as fully equal, respected, and participating members of society.     

‘The State of Slavery': Somerset,The Slave,Grace, and the Rise of Pro-Slavery and Anti-Slavery Constitutionalism in the Nineteenth-Century Atlantic World

From 1772 until the 1830s, the landmark decision in Somerset v. Stewart, which held that a slave must be freed by virtue of his presence on English soil, provided a powerful weapon in the trans-Atlantic battle against chattel slavery. But by the 1840s and 1850s, pro-slavery advocates used another British opinion, The Slave, Grace, as a counterargument to shape a new pro-slavery constitutionalism. This article studies four cases critical to understanding this process of reinterpretation: The Slave, Grace (1827), Commonwealth v. Aves (1836), The Slave, Matilda (1837), and Strader v. Graham (1852). These four decisions reveal the escalating battle of legal doctrine pitting freedom based on the absence of positive law vs. the reversion and reattachment of slave status.     

A comparative assessment of track plates to quantify fine scale variations in the relative abundance of Norway rats in urban slums

Norway rats (Rattus norvegicus) living in urban environments are a critical public health and economic problem, particularly in urban slums where residents are at a higher risk for rat borne diseases, yet convenient methods to quantitatively assess population sizes are lacking. We evaluated track plates as a method to determine rat distribution and relative abundance in a complex urban slum environment by correlating the presence and intensity of rat-specific marks on track plates with findings from rat infestation surveys and trapping of rats to population exhaustion. To integrate the zero-inflated track plate data we developed a two-component mixture model with one binary and one censored continuous component. Track plate mark-intensity was highly correlated with signs of rodent infestation (all coefficients between 0.61 and 0.79 and all p-values?<?0.05). Moreover, the mean level of pre-trapping rat-mark intensity on plates was significantly associated with the number of rats captured subsequently (Odds ratio1.38; 95 % CI 1.19–1.61) and declined significantly following trapping (Odds ratio 0.86; 95 % CI 0.78–0.95). Track plates provided robust proxy measurements of rat abundance and distribution and detected rat presence even when populations appeared ‘trapped out’. Tracking plates are relatively easy and inexpensive methods that can be used to intensively sample settings such as urban slums, where traditional trapping or mark-recapture studies are impossible to implement, and therefore the results can inform and assess the impact of targeted urban rodent control campaigns.     

Standardization of surgical procedures for identifying best practices and training

A taxonomy was developed a) to describe surgical procedures with sufficient detail to review differences among surgeons, b) to examine the relationship between individual technique and outcomes, c) to enable surgeons to standardize technique around best practices and d) to identify clinical-evidence-based key points of teaching and assessment for surgical training. Sixty-seven microvascular anastomoses were recorded through video cameras mounted in the dissecting microscope. A hierarchical task analysis was used to decompose the observed procedures into successive levels of detail. The results were then presented to individual and small groups of microvascular surgeons to help define steps and step attributes necessary to describe a procedure so that other surgeons can perform the procedure exactly the same way. Coincidently, it was found that because the surgeons' attention is confined to a very small field of view in which they can see only the veins and arteries and the ends of their instruments, they often have difficulty communicating with others in the operating room. Analyses of selected cases using the proposed taxonomy shows how subtle details are revealed that may affect outcomes, and indicate specific training needs. By comparing different methods and outcomes, it should be possible to identify best practices for given conditions.