Aquifer sensitivity map, Jo Daviess County, Illinois

Computer generated map./ "This map was prepared by the Illinois State Geological Survey, in cooperation with the Illinois Department of Commerce and Community Affairs and the Jo Daviess County Board. It is part of a suite of maps created to assist local government in addressing geologic questions concerning capable sites for landfill development. Maps produced for this study are intended for regional land use planning purposes. More detailed mapping is needed for site-specific considerations. This map has been reviewed for scientific accuracy and edited to meet the quality standards of maps in the ISGS Map Series."/ Includes text, references, 3 ancillary maps, and location map.Ope

Land surface topography map, Jo Daviess County, Illinois

Ope

Two-dimensional Yang-Mills Theories Are String Theories

We show that two-dimensional SO(N) and Sp(N) Yang-Mills theories without fermions can be interpreted as closed string theories. The terms in the 1/N expansion of the partition function on an orientable or nonorientable manifold M can be associated with maps from a string worldsheet onto M. These maps are unbranched and branched covers of M with an arbitrary number of infinitesimal worldsheet cross-caps mapped to points in M. These string theories differ from SU(N) Yang-Mills string theory in that they involve odd powers of 1/N and require both orientable and nonorientable worldsheets.Comment: (two references added; one old, one recent) 14pages, Latex, BRX-TH-346, JHU-TIPAC-93001

Diverse Struggles to Preserve Tribal Identity on the Plains: Religion as Survival Strategy in the Late Nineteenth Century among the Lakota and Osage

College of Arts and Sciencesmonographi

Dynamic Interfaces in Beginning L2 Mandarin Construction Learning: A Usage-Based Corpus Investigation of Frequency Distribution, Communicative Function and Salience.

Ph.D. Thesis. University of Hawaiʻi at Mānoa 2018

Carbon monoxide and hydrogen mass transfer in a stirred tank reactor

The United States uses petroleum for everything from fuels to plastics. Currently, the US is importing over half of its petroleum from foreign sources. If the access to these foreign sources should suddenly cease, the US would suffer huge economic hardship. Processes have been developed that convert renewable sources into bio-based fuels and plastics that are similar to similar petroleum-based plastics. One of these processes is synthesis gas fermentation, which takes any biological material, converts it into gases (primarily carbon monoxide and hydrogen), and utilizes microorganisms that convert these gases into fuels and chemicals. However, such processes are currently not economically feasible. It has been suggested that the limiting step in synthesis gas fermentation is the mass transfer of these gases into the liquid medium that supports the microorganism growth. A study has been undertaken to understand the mass transfer rate of carbon monoxide and hydrogen into water in a stirred tank reactor. Methods for determining dissolved carbon monoxide and hydrogen concentrations will be developed. These methods will be used to determine volumetric mass transfer coefficients for these gases over a range of impeller stirring speeds from N = 200 to 600 RPM and volumetric gas flow rates from Q = 1 to 6 L/min. The volumetric mass transfer rate will then be correlated to the power density and superficial gas velocity in the stirred tank reactor for each gas. These correlations will be compared to those currently found in the literature

The Largest Known Dinosaur

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