Competing `soft' dielectric phases and detailed balance in thin film manganites

Using frequency dependent complex capacitance measurements on thin films of the mixed-valence manganite (La$_{1-y}$Pr$_{y}$)$_{1-x}$Ca$_{x}$MnO$_{3}$, we identify and resolve the individual dielectric responses of two competing dielectric phases. We characterize their competition over a large temperature range, revealing they are in dynamic competition both spatially and temporally. The phase competition is shown to be governed by the thermodynamic constraints imposed by detailed balance. The consequences of the detailed balance model strongly support the notion of an `electronically soft' material in which continuous conversions between dielectric phases with comparable free energies occur on time scales that are long compared with electron-phonon scattering times.Comment: 8 pages, 7 figure

Oceanographic features in the lee of the windward and leeward islands: ERTS and ship data

Analysis of the ERTS data in portions of the eastern Caribbean are presented for October 1972 showing features which are, as yet, not explained. Ground truth data obtained in that area during November 1972 are presented. These include vertical temperature structure in the mixed layer and thermocline, and surface measurements of salinity, temperature, and chlorophyll

The First White Women in Wyoming

"Wyoming seems very young when one fully realizes that tomorrow it will be only eighty years since the first white women came into the Great American desert and…Wyoming.

Practice Resurrection: Urban Planning, the Right to the City, and Transformative Social Justice

Social justice movements organize against contemporary conditions of oppression and domination. Today’s movements often target neoliberalism as an agent of both economic and cultural marginalization, citing environmental degradation, increasing wealth disparities in the information/service economy, and destruction of community-based institutions in the name of capital accumulation. One such example is the right to the city, both an intellectual idea and organizing framework for social action. The right to the city utilizes a Marxist framework to argue that cities are part of capitalist processes of production and, thus, space can and must be a site of intervention in the service of social justice. This thesis argues that the right to the city literature and organizing practices effectively implement critiques of both capitalism and neoliberalism, enabling material gains for the urban dispossessed, as well as structural critiques. However, the right to the city literature largely fails to make explicit the connection between colonialism and capitalism in producing both urban space and social narratives. Both organizers and academics within the right to the city largely neglect the relationship between the contemporary city and Indigenous resistance and sovereignty movements, though they often operationalize a decolonial analysis by critiquing the discourse of subjugation of the Other. This thesis argues that the lack of an explicit connection between colonialism and capitalism limits the radical potential of the right to the city movement. Think tanks have proven to be an effective means for generating and disseminating narrative and influencing the contemporary political landscape through individual and social consciousness. Therefore, this thesis argues that social justice funders should behave more like think tanks than foundations in part by facilitating a convergence on the question of the relationship between decolonization and consciousness in order to further advance the radical vision of contemporary social justice movements, of which the right to the city is one example. â€