A New Perspective on the Nonextremal Enhancon Solution

We discuss the nonextremal generalisation of the enhancon mechanism. We find that the nonextremal shell branch solution does not violate the Weak Energy Condition when the nonextremality parameter is small, in contrast to earlier discussions of this subject. We show that this physical shell branch solution fills the mass gap between the extremal enhancon solution and the nonextremal horizon branch solution.Comment: 10 pages, 3 figures, reference adde

LOEX 2012 Conference Report: Columbus, OH

Summary of plenary and breakout sessions of the 40th annual LOEX conference in Columbus, Ohio on May 3-5, 2012

America’s largest classroom: Expanding the role of education in our parks

An introduction to this issue's set of theme papers, which were inspired by the new book America’s Largest Classroom: What We Learn from Our National Parks (University of California Press, 2020). These papers explore innovations in education and interpretation in the US National Park Service

The Measure of Poverty: A Boston Indicators Project Special Report

Examines Boston's poverty rate by race/ethnicity, family structure, education, and geography; income inequality; demand for safety-net programs; and how the high cost of living and budget cuts affect vulnerable households and those below the poverty line

What can the Apple Teach the Orange? Lessons U.S. Land Trusts can Learn from the National Trust in the U.K.

The National Trust in England, Wales, and Northern Ireland is one of the oldest and most revered private land conservation organizations in the world. While the private land conservation movements in the United States and the United Kingdom began at a similar time and with similar tools, conservation attitudes and methods in the two countries diverged. Today, the National Trust dominates land conservation in the U.K. while the strength of the U.S. movement is the energy of over 1,500 smaller organizations operating at different scales across the country. Despite the differences, this project looks to the National Trust in England and concludes that three elements of the National Trust’s experience provide important insights for U.S. land trusts rethinking their programs as political and environmental change engulfs the planet. First, the National Trust has gone through several iterations in its understanding of general public benefit and public access to protected properties in a way that most U.S. land trusts have yet to do. Second, National Trust experience suggests that U.S. land trusts could become more engaged in land-use regulations rather than presenting themselves primarily as an alternative (private, compensated, voluntary) thereto. Finally, the National Trust’s approaches to balancing agricultural productivity with sustainability provide useful models to study and emulate in the management of working landscapes. Many of the lessons learned by the National Trust could enrich private land conservation in the United States in an era of government withdrawal from environmental protection and growing impacts of climate change

City of Ideas: Reinventing Boston's Innovation Economy: The Boston Indicators Report 2012

Analyzes indicators of the city's economic, social, and technological progress; potential for creating innovative solutions to global and national challenges; and complexities, disparities, and weaknesses in the indicators and innovation economy paradigm