443 research outputs found
Review of the Current State of Desalination
Abstract not available. Working Paper Number 2005-00
Comparison of different sources for laboratory X-ray microscopy
This paper describes the setup of two different solutions for laboratory
X-ray microscopy working with geometric magnification. One setup uses thin-film
transmission targets with an optimized tungsten-layer thickness and the
electron gun and optics of an electron probe micro analyzer to generate a very
small X-ray source. The other setup is based on a scanning electron microscope
and uses microstructured reflection targets. We also describe the structuring
process for these targets. In both cases we show that resolutions of 100 nm can
be achieved. Also the possibilities of computed tomography for 3D imaging are
explored and we show first imaging examples of high-absorption as well as
low-absorption specimens to demonstrate the capabilities of the setups.Comment: 6 pages, 4 figures, proceedings of the 14th International Workshop on
Radiation Imaging Detector
Stelvio. A novel hands-off approach to design of Settlements as self-organizing systems of growth and decay
Coastal River Basins Water Resource Assessment An Evaluation of Water Use and Availability in Seven Coastal River Basins
Georgia has experienced a persistent drought for the last four years. While the drought conditions have subsided, the need for effective river basin planning continues. Effective water planning for our river basins will ensure adequate resource availability for the immediate future as well as over the long run.Basin planning consists of four primary steps: 1) understanding current and future water demands, 2) understanding existing resources (water supply), 3) anticipating potential shortfalls and other issues that might arise from the discrepancies between supply and demand, and 4) devising policy solutions which adequately resolve items identified in step 3).This report explores the available data for water demands and supplies across the seven river basins that make up the coastal region served by the Coastal Rivers Water Planning and Policy Center at Georgia Southern University. The permit issuing and water use reporting processes have made it difficult to accurately estimate water demand across the region. Moreover, the river data is sparse, sporadic, and insufficient to determine the unimpaired flows for any of our rivers. Our intent is to highlight the areas for future data collection such that our state policy makers may successfully establish river basin water use plans that ensure sustainable economic growth, with minimal environmental impacts. Working Paper # 2003-00
Sonia MONTECINO, Fuegos, hornos y donaciones. Alimentación y Cultura en Rapa Nui
El interés de Fuegos, hornos y donaciones no es únicamente académico y gastronómico, sino también patrimonial. Esta obra se inscribe dentro de un movimiento mayor que a tenido lugar en Chile desde el regreso de la democracia (1989), cuyo objetivo es preservar y revalorar el patrimonio cultural de los grupos históricamente marginalizados. En ese contexto, los saberes y prácticas culinarias tradicionales han emergido como elementos fundamentales de lo que ha sido considerado por la autoridades ..
How Does Individual Recognition Evolve? Comparing Responses to Identity Information in P olistes Species with and Without Individual Recognition
A wide range of complex social behaviors are facilitated by the recognition of individual conspecifics. Individual recognition requires sufficient phenotypic variation to provide identity information as well as receivers that process and respond to identity information. Understanding how a complex trait such as individual recognition evolves requires that we consider how each component has evolved. Previous comparative studies have examined phenotypic variability in senders and receiver learning abilities, although little work has compared receiver responses to identity information among related species with and without individual recognition. Here, we compare responses to identity information in two Polistes paper wasps: P. fuscatus, which visually recognizes individuals, and P. metricus , which does not normally show evidence of individual recognition. Although the species differ in individual recognition, the results of this study show that receiver responses to experimentally manipulated identity information are surprisingly similar in both species. Receivers direct less aggression toward identifiable individuals than unidentifiable individuals. Therefore, the responses necessary for individual recognition may pre‐date its evolution in the P. fuscatus lineage. Additionally, our data demonstrate the apparent binary differences in a complex behavior between the two species, such as individual recognition, likely involve incremental differences along a number of axes.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/102093/1/eth12191.pd
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