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Evaluation of Four Geomembrane-Mounted PV Systems for Land Reclamation in Southern Arizona

Journal of Energy and Power Engineering 2013年第5期7卷 834-840页

作者： Adria E. Brooks nathan allen Vincent P. Lonij Alexander D. Cronin Department of Physics University of Arizona Tucson AZ 85721 USA Biosphere 2 College of Science University of Arizona Tucson AZ 85739 USA

Four different PV （photovoltaic） systems deployed around Tucson Arizona on geomembranes are used to test the feasibility of converting mine tailings and landfills into solar energy generating sites. Differences between these deployed systems include： two types of geomembrane materials, two different module anatomies and two different locations. Module mounting techniques unique to mine tailing sites are described. Several system failures observed during the first two years of operation are explained here in detail. Validated predictions for the operating temperature of these systems and their associated electrical performance are presented. It was determined that PV modules mounted on light-colored thermoplastic with shielded wiring operate at lower temperatures, are structurally stable, and experience fewer wiring failures.

关键词： Photovoltaic systems system performance current-voltage characteristics surface-mount technology land reclamation mining applications polyethylene geomembrane.

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Periodic Addition of Glucose Suppressed Cyanobacterial Abundance in Additive Lake Water Samples during the Entire Bloom Season

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Journal of Water Resource and Protection 2024年第2期16卷 140-155页

作者： David Linz Ian Struewing nathan Sienkiewicz Alan David Steinman Charlyn Gwen Partridge Kyle McIntosh Joel allen Jingrang Lu Stephen Vesper United States Environmental Protection Agency Cincinnati Ohio USA Annis Water Resources Institute Grand Valley State University Muskegon USA Oak Ridge Institute for Science and Education Oak Ridge Tennessee USA

Previously, we showed that prophylactic addition of glucose to Harsha Lake water samples could inhibit cyanobacteria growth, at least for a short period of time. The current study tested cyanobacterial control with glucose for the entire Harsha Lake bloom season. Water samples (1000 ml) were collected weekly from Harsha Lake during the algal-bloom season starting June 9 and lasting until August 24, 2022. To each of two 7-liter polypropylene containers, 500 ml of Harsha Lake water was added, and the containers were placed in a controlled environment chamber. To one container labeled “Treated,” 0.15 g of glucose was added, and nothing was added to the container labeled “Control.” After that, three 25 ml samples from each container were collected and used for 16S rRNA gene sequencing each week. Then 1000 ml of Harsha Lake water was newly collected each week, with 500 ml added to each container, along with the addition of 0.15 g glucose to the “Treated” container. Sequencing data were used to examine differences in the composition of bacterial communities between Treated and Control containers. Treatment with glucose altered the microbial communities by 1) reducing taxonomic diversity, 2) largely eliminating cyanobacterial taxa, and 3) increasing the relative abundance of subsets of non-cyanobacterial taxa (such as Proteobacteria and Actinobacteriota). These effects were observed across time despite weekly inputs derived directly from Lake water. The addition of glucose to a container receiving weekly additions of Lake water suppressed the cyanobacterial populations during the entire summer bloom season. The glucose appears to stimulate the diversity of certain bacterial taxa at the expense of the cyanobacteria.

关键词： Glucose Cyanobacteria 16S Amplicon Sequencing Microbial Community

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EXAMPLES OF RECENT ADVANCES IN SEISMIC STRUCTURAL TESTS

EXAMPLES OF RECENT ADVANCES IN SEISMIC STRUCTURAL TESTS

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2007年全国砌体结构基本理论与工程应用学术会议

作者： allen J.Clark Rod Larson Tony Y.Yang Bozidar Stojadinovic Jack P.Moehle Robert Tremblay Nilolay Velev Sina Merzouq Martin Leclerc Pierre Leger Bruno Massicotte Caroline Blais Colin Rogers M.Pangiotou Jose I.Restrepo Robert E.Englekirk nathan Johnson M.Saiid Saiidi David Sanders Richard T.Ranf Marc Eberhard Andrei M.Reinhorn Mettupalayam V.Sivaselvan Zach Liang Mark Pittman Scot Weinreber MTS Systems Corporation Department of Civil and Environmental Engineering University of California at Berkeley Group for Research and Studies in Structural Engineering.Department of Civil Geological and Mining Engineering.Ecole Polytechnique Department of Civil Engineering and Applied Mechanics McGill University Department of Structural Engineering University of California at San Diego Englekirk Partners Consulting Structural Engineers Inc. University of Nevada University of Washington Department of Civil Structural and Environmental Engineering University of Buffalo

＜正＞Earthquake damage of property and loss and injury of human life *** many laboratories worldwide have increased their abilities to mitigate the hazards of these reoccurring natural *** paper presents new experimental techniques and applications from five laboratories,one in Canada,and four in the United *** new techniques and technologies range from combining computational analyses with structural testing with strong wall and strong floor at the University of California at Berkelely, a new technique for increasing the capability of a medium size uniaxial shaking table at Ecole Polytechnique,a description of the world’s highest capacity outdoor shaking table at the University of California at San Diego,testing with multiple biaxial shaking tables at the University of Reno,Nevada,and finally,the combination of strong wall dynamic structural actuators with a shaking table and real time computational sub-structuring computations at the University at Buffalo（SUNY）.These new capabilities allow the researcher to increase the size of the specimens of interest,allowing much better results to study nonlinear behaviors and failure mechanisms.

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