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Geological considerations in disposal of solid municipal wastes in Texas
Full text linkBureau Publication GC7002 - to purchase a print copy please go to: https://store.beg.utexas.edu/geologic-circulars/398-gc7002.htmlIn the United States the average citizen produces 6 to 8 pounds of solid wastes per day--this includes his personal contribution plus his pro-rata share of industrial and agricultural wastes. A city of 200,000 to 300,000 people is faced with collecting, transporting, and disposing of about 400 tons to 500 tons of solid wastes every day. This is the amount produced by the residents and small businesses--it does not include the wastes from big industrial operations. Costs of solid waste disposal range from 30 per ton depending on local labor costs, the distance the material must be transported, and the costs of acquisition and operation of disposal sites. In Texas, cost of landfill operations alone averages $1.10 per ton (Gazda and Malina, 1969, p. 23). The practice of open burning of wastes at the disposal site has been discontinued in many areas because of air pollution control legislation. This increases the volume of material that must be buried. In some areas the volume of solid wastes is reduced by high-temperature incinerators prior to ultimate disposal, in others controlled burning of wastes produces by-product steam.Bureau of Economic GeologyUT Librarie
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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Urban flooding and slope stability, Austin, Texas
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Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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Quality of water in the Edwards aquifer, central Travis County, Texas
No full textThe Rollingwood area in central Travis County, Texas, is the principal zone of recharge to the Edwards limestone aquifer. As a result of extensive suburban development in the past 25 years, the number of septic-tank systems in the area has greatly increased. However, thin soils and fractured bedrock may limit the effectiveness of waste renovation in these systems. In order to determine if effluent from septic tanks has affected the quality of ground water in the Edwards aquifer, samples from wells in the area were analyzed for several constituents that may indicate contamination by septic tanks - nitrate, ammonium, chloride, phosphate, organic carbon, and total coliform bacteria. Concentrations of these parameters are similar to background concentrations in water from the Edwards, indicating that suburban development has not resulted in detectable degradation of the quality of water in the aquifer. During the study, water quality did not vary significantly areally, temporally, or as a result of heavy rainfall. The lack of degradation of water quality probably is due to (1) the thickness of the unsaturated zone (greater than 110 feet) through which effluent must travel to reach the water table, (2) adsorption of pollutants on insoluble residue in solution zones and on walls of fractures in the unsaturated zone, and (3) dilution and dispersion of contaminants in the saturated zone of the aquifer. Chemical analyses of water from Barton Creek, Barton Springs, the Edwards aquifer, and the Colorado River indicate that discharge from the aquifer at Barton Springs may be a mixture of recharge from both Barton Creek and the Colorado River. Chemically, water from wells in the Edwards is similar to water in Barton Creek, indicating that the creek is a principal source of recharge to the aquifer. Variations in the composition of water from Barton Springs correlate with the rate of discharge at the springs. When spring discharge is high, the composition of water in the springs resembles that of water from Barton Creek and wells in the Edwards. At times of low discharge at the springs - when rainfall, streamflow, and therefore, recharge from Barton Creek are low--chemistry of water at Barton Springs resembles that of Colorado River water.Earth and Planetary Science
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