Spatial and Alignment Analyses for a Field of Small Volcanic Vents South of Pavonis Mons and Implications for the Tharsis Province, Mars

A field of small volcanic vents south of Pavonis Mons was mapped with each vent assigned a two-dimensional data point. Nearest neighbor and two-point azimuth analyses were applied to the resulting location data. Nearest neighbor results show that vents within this field are spatially random in a Poisson sense, suggesting that the vents formed independently of each other without sharing a centralized magma source at shallow depth. Two-point azimuth results show that the vents display north-trending alignment relationships between one another. This trend corresponds to the trends of faults and fractures of the Noachian-aged Claritas Fossae, which might extend into our study area buried beneath more recently emplaced lava flows. However, individual elongate vent summit structures do not consistently display the same trend. The development of the volcanic field appears to display tectonic control from buried Noachian-aged structural patterns on small, ascending magma bodies while the surface orientations of the linear vents might reflect different, younger tectonic patterns. These results suggest a complex interaction between magma ascension through the crust, and multiple, older, buried Tharsis-related tectonic structures

Standardizing the nomenclature of Martian impact crater ejecta morphologies

International audienceThe Mars Crater Morphology Consortium recommends the use of a standardized nomenclature system when discussing Martian impact crater ejecta morphologies. The system utilizes nongenetic descriptors to identify the various ejecta morphologies seen on Mars. This system is designed to facilitate communication and collaboration between researchers. Crater morphology databases will be archived through the U.S. Geological Survey in Flagstaff, where a comprehensive catalog of Martian crater morphologic information will be maintained

PRIVATIZED FROM THE INSIDE: A NETWORK ETHNOGRAPHY OF BRAZILIAN TEACHER EDUCATION POLICY UNDER THE WORKERS’ PARTY

The theory of a globally structured education agenda interrogates the political and economic systems that influence how states take on policy ideas. One way that globalizing processes may take place is through network governance, or via networks of people, ideas, researchers, governments, non-governmental organizations, private companies, etc. This study explores how power plays a role in the proliferation of particular policy ideas about teacher education in such networks. Brazilian education expanded greatly since the 1990s as did the demand for teachers of higher qualifications. Via network ethnography, this study examined the people, organizations, and ideas that influenced teacher education policy since the mid-1990s. Network ethnography is an emerging method and framework in international education research, and this study builds on what is understood about the role of corporations and other private enterprises in education policy. The results of this network ethnography revealed two primary coalitions, each of whose power over teacher education policy shifted with federal regime changes. One coalition, centered around the Brazilian Campaign for the Right to Education, frames teacher training and schooling as places to foster participatory democracy and build citizens. The other coalition, centered around the All for Education Movement, frames teacher training as a set of apolitical technical skills that should be provided in so-called proven and fiscally efficient ways. In light of these results, I argue that the dominant coalition, led by the All for Education Movement, which is backed by the business and financial sectors, steadily and consistently worked to solidify its place in the federal education policymaking arena throughout the time period under study and as a result governs teacher qualification and teacher training issues

Standardizing the nomenclature of Martian impact crater ejecta morphologies

The Mars Crater Morphology Consortium recommends the use of a standardized nomenclature system when discussing Martian impact crater ejecta morphologies seen on Mars. The system utilizes nongenetic descriptors to identify the various ejecta morphologies seen on Mars. This system is designed to facilitate communication and collaboration between researchers. Crater morphology databases will be archived through the U.S. Geological Survey in Flagstaff, where a comprehensive catalog of Martian crater morphologic information will be maintained