Who Stays and Who Leaves? Findings from a Three-Part Study of Teacher Turnover in NYC Middle Schools

This paper synthesizes findings from the Research Alliance's investigation of teacher turnover in New York City's public middle schools. These years are widely recognized as a critical turning point for students, and the NYC Department of Education (DOE) is pursuing a range of middle school improvement initiatives. The stability of the middle school teaching force has the potential to facilitate or complicate these efforts, yet there have been few studies of the rates and patterns of teacher turnover in the City's middle schools.This study provides the most current, comprehensive look at middle school teacher turnover to date. Drawing on a range of data sources -- including DOE human resource records from the last decade, a survey of over 4,000 full-time middle school teachers, and in-depth case studies in four middle schools -- this paper examines how long middle school teachers remain in their schools, how long they intend to stay, and what predicts whether or not they leave. It also explores how various aspects of teachers' work environment may influence these decisions. Among the key findings: Among middle school teachers who entered their school during the last decade, more than half left that school within three years -- significantly higher than the rates seen for elementary and high school teachers. Of the teachers who leave, most exit the NYC public school system altogether, and only about 1 in 10 transition to another grade 6-8 school. The findings point to several strategies that may be useful for increasing middle school teachers' lengths of stay

Optimal control of the propagation of a graph in inhomogeneous media

We study an optimal control problem for viscosity solutions of a Hamilton–Jacobi equation describing the propagation of a one-dimensional graph with the control being the speed function. The existence of an optimal control is proved together with an approximate controllability result in the $H^{-1}$-norm. We prove convergence of a discrete optimal control problem based on a monotone finite difference scheme and describe some numerical results

Predicting the effectiveness of hepatitis C virus neutralizing antibodies by bioinformatic analysis of conserved epitope residues using public sequence data

Hepatitis C virus (HCV) is a global health issue. Although direct-acting antivirals are available to target HCV, there is currently no vaccine. The diversity of the virus is a major obstacle to HCV vaccine development. One approach toward a vaccine is to utilize a strategy to elicit broadly neutralizing antibodies (bNAbs) that target highly-conserved epitopes. The conserved epitopes of bNAbs have been mapped almost exclusively to the E2 glycoprotein. In this study, we have used HCV-GLUE, a bioinformatics resource for HCV sequence data, to investigate the major epitopes targeted by well-characterized bNAbs. Here, we analyze the level of conservation of each epitope by genotype and subtype and consider the most promising bNAbs identified to date for further study as potential vaccine leads. For the most conserved epitopes, we also identify the most prevalent sequence variants in the circulating HCV population. We examine the distribution of E2 sequence data from across the globe and highlight regions with no coverage. Genotype 1 is the most prevalent genotype worldwide, but in many regions, it is not the dominant genotype. We find that the sequence conservation data is very encouraging; several bNAbs have a high level of conservation across all genotypes suggesting that it may be unnecessary to tailor vaccines according to the geographical distribution of genotypes

Scholarly Communication and Publishing Lunch and Learn Talks

This series of talks focuses on issues in scholarly communication and publishing presented to University Library System (ULS), University of Pittsburgh colleagues by staff members of the ULS Office of Scholarly Communication and Publishing. Many of these talks feature "toolbox" tips on how to apply knowledge gained from the talks. Links to recordings of the talks are provided when available. For topics and presentations, see the record for each talk

The Effect of Seasonal Change on the Group Size, Group Composition, and Activity Budget of White-Tailed Deer, Odocoileus virginianus

Author Institution: Department of Zoology, Miami UniversityA free-ranging population of white-tailed deer (Odocoileus virginianus) located at the Miami University Ecology Research Center near Oxford, OH, was examined from October 1993 to February 1994 to determine seasonal changes in group size, group composition (number of males, females, and offspring), and behavior (feeding, locomotion, alert, and other behaviors). Observations took place at dusk in open pasture from a deer blind. Data were collected utilizing both scan samples and 60 second focal animal samples recorded on video. A significant increase in group size was found from fall to winter. No difference in group composition was found between seasons. Seasonal differences in behavior were found for all age/sex classes with an increase in feeding and a decrease in locomotion during the winter

Relative Periodic Solutions of the Complex Ginzburg-Landau Equation

A method of finding relative periodic orbits for differential equations with continuous symmetries is described and its utility demonstrated by computing relative periodic solutions for the one-dimensional complex Ginzburg-Landau equation (CGLE) with periodic boundary conditions. A relative periodic solution is a solution that is periodic in time, up to a transformation by an element of the equation's symmetry group. With the method used, relative periodic solutions are represented by a space-time Fourier series modified to include the symmetry group element and are sought as solutions to a system of nonlinear algebraic equations for the Fourier coefficients, group element, and time period. The 77 relative periodic solutions found for the CGLE exhibit a wide variety of temporal dynamics, with the sum of their positive Lyapunov exponents varying from 5.19 to 60.35 and their unstable dimensions from 3 to 8. Preliminary work indicates that weighted averages over the collection of relative periodic solutions accurately approximate the value of several functionals on typical trajectories.Comment: 32 pages, 12 figure

Sustainability science graduate students as boundary spanners

Graduate training in sustainability science (SS) focuses on interdisciplinary research, stakeholder-researcher partnerships, and creating solutions from knowledge. But becoming a sustainability scientist also requires specialized training that addresses the complex boundaries implicit in sustainability science approaches to solving social-ecological system challenges. Using boundary spanning as a framework, we use a case study of the Sustainability Solutions Initiative (SSI) at the University of Maine to explicate key elements for graduate education training in SS. We used a mixed-methods approach, including a quantitative survey and autoethnographic reflection, to analyze our experiences as SSI doctoral students. Through this research, we identified four essential SS boundaries that build on core sustainability competencies which need to be addressed in SS graduate programs, including: disciplines within academia, students and their advisors, researchers and stakeholders, and place-based and generalizable research. We identified key elements of training necessary to help students understand and navigate these boundaries using core competencies. We then offer six best practice recommendations to provide a basis for a SS education framework. Our reflections are intended for academic leaders in SS who are training new scientists to solve complex sustainability challenges. Our experiences as a cohort of doctoral students with diverse academic and professional backgrounds provide a unique opportunity to reflect not only on the challenges of SS but also on the specific needs of students and programs striving to provide solutions

USA\u27s Response to Idaho and other Objectors

The United States\u27 Response to the State of Idaho\u27s and Objectors\u27 Motion for Summary Judgmen