Physical Sciences and Mathematics Commons^™

Macroscopic Investigation Of Ionic- And Nano-Silver Toxicity To Soil Nitrification Process, Abdurrahman Masrahi

All Theses

The worldwide production of engineered nanoparticles (ENPs) has grown rapidly in our era because of the popular applications in industrial and consumer markets. Especially silver (Ag) NP is one of mostly common ENPs in our consumer products due to its unique antimicrobial property. However, release of AgNPs into environment through wastewater treatment plants poses a question that what impact AgNPs have on microbially mediated processes in environment (e.g., nutrient and trace element cycles). In the last decades, numerous toxicological studies of AgNPs on bacteria have been conducted in pure culture systems, and several different antimicrobial mechanisms of AgNPs have been …

Aqueous Geochemistry Of Rhenium And Chromium In Saltstone: Implications For Understanding Technetium Mobility In Saltstone, Amanda Hatfield

All Theses

Incorporation of low level radioactive waste in cementitious materials is an important waste disposal technology in practice at a U.S. DOE facility, the Savannah River Site (SRS), Aiken, SC. One of the major risk drivers, technetium (99Tc)

Umphlett Qci Dec 2013, Natalie A. Umphlett

High Plains Regional Climate Center: Personnel Publications

Highlights for the Basin

Temperature and Precipitation Anomalies

Soil Moisture

September Flooding in Colorado

Early October Blizzard

3-Month Precipitation and Temperature Outlooks

U.S. Seasonal Drought Outlook

Origin Of High Levels Of Ammonium In Groundwater, Ottawa County, Michigan, Derrick Lingle

Masters Theses

Groundwater from wells located in and around Hemlock Crossing Park in Ottawa County, Michigan has elevated levels of ammonium. High ammonium concentrations in potable water wells are a common indicator of anthropogenic impact, such as landfill leachate or agricultural activity. Ammonium can also occur in groundwater through the decay of natural organic material. Along with the retrieval of a complete glacial sediment core via rotasonic drilling, numerous chemical and isotopic parameters were used to determine the source of ammonium in the impacted aquifer.

Buried organic material, deposited during the Athens subepisode interglacial period, is in contact with groundwater containing elevated …

Criticality And Characteristic Neutronic Analysis Of A Transient-State Shockwave In A Pulsed Spherical Gaseous Uranium-Hexafluoride Reactor, Jeremiah Boles

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to analyze the theoretical criticality of a spherical uranium-hexafluoride reactor with a transient, pulsed shockwave emanating from the center of the sphere in an outward-radial direction. This novel nuclear reactor design, based upon pulsed fission in a spherical enclosure is proposed for possible use in direct energy conversion, where the energy from fission products is captured through the use of electrostatic fields or through induction. An analysis of the dynamic behavior of the shockwave in this reactor is the subject of this thesis. As a shockwave travels through a fluid medium, the characteristics of …

Hydrogeological And Thermal Sustainability Of Geothermal Borehole Heat Exchangers, S. Emad Dehkordi

Electronic Thesis and Dissertation Repository

Assessment of the current approach taken by guidelines and design methods of vertical closed loop heat exchangers shows that often groundwater flow is either disregarded or is not methodically incorporated. The state of scientific research in this arena reveals that overlooking the groundwater flow in the design procedure may not always be a correct assumption. The significance of advective heat transport compared to conduction is defined by the groundwater flux or Darcy velocity which heavily depends on the hydraulic conductivity of the ground, followed by the hydraulic gradient which has a relatively limited range. A sensitivity analysis on ground and …

U.S. Drought Monitor, November 26, 2013, Richard R. Heim Jr.

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for November 26, 2013 (11/26/13) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

Evaluating The Effectiveness Of Design For The Environment Tools To Help Meet Sustainability And Design Goals, Ana Maria Leal-Yepes

Theses

Environmental impacts of electronics are a growing concern because the amount and type of materials used in production of the devices, the impacts to the environment from discarded

electronics and the early retirement of products due to rapidly evolving devices, changing design trends, and perceived technological obsolescence. Design for the Environment is a sustainability strategy that aims to reduce the environmental impacts through techniques that enable sustainability solutions during the design decision-making process. In order to suit the diverse

needs of sustainable design practitioners, there has been a large number of tools for Design for the Environment (DfE) developed, confusing …

Collaborative Research: Subglacial Water Intrusion In Greenland, Gordon K. Oswald

University of Maine Office of Research Administration: Grant Reports

The project's goals are:

• To analyse radio echo sounding data acquired over the Greenland Ice Sheet by the University of Kansas / CReSIS team with the objective of discriminating between frozen and thawed conditions at the bed of the ice sheet.
• To provide maps of the bed state, with the aim of making them available via the National Snow and Ice Data Centre.
• To support ice sheet modelling activities by providing information on the bed state, thus related to the temperature at the bed and the rheological conditions at the bed.
• To make available to educational establishments information on the …

Marine Park Planning And Recreational Fishing: Is The Science Lost At Sea? Case Studies From Australia, Daryl Mcphee

Daryl McPhee

“No take” marine parks are widely advocated and increasingly utilised as a tool aimed at protecting marine biodiversity, and they may also be used as a fisheries management tool. In Australia a national system of no-take marine parks is being established to protect marine biodiversity. The creation of this network of no-take marine parks that exclude the public from recreational fishing in large areas of the ocean is extremely contentious. Nearly one quarter of the Australian population goes recreational fishing at least once a year, and it is a $2 billion industry. The motivations for, and aspirations of these recreational …

Zakład Termicznego Przekształcania Odpadów Komunalnych W Krakowie – Założenia Projektowe I Stan Realizacji Budowy, Mateusz Rzeszutek, Robert Oleniacz

Robert Oleniacz

The aim of this paper is to discuss the design assumptions and to determine the current status of the construction of the Municipal Solid Waste Thermal Treatment Plant (ZTPOK) in Krakow with a capacity of 220 thousand tons per year. This plant, planned to be built by the end of 2015 years, will be an important element of municipal waste management system in the area of the Municipality of Krakow. ZTPOK in Krakow will consist of the following installations: two lines of municipal solid waste incinerators based on moving grate technology, an installation of chemical solidification and stabilization of fly …

Space-For-Time Substitution Works In Everglades Ecological Forecasting Models, Amanda I. Banet, Joel C. Trexler

Department of Biological Sciences

Space-for-time substitution is often used in predictive models because long-term time-series data are not available. Critics of this method suggest factors other than the target driver may affect ecosystem response and could vary spatially, producing misleading results. Monitoring data from the Florida Everglades were used to test whether spatial data can be substituted for temporal data in forecasting models. Spatial models that predicted bluefin killifish (Lucania goodei) population response to a drying event performed comparably and sometimes better than temporal models. Models worked best when results were not extrapolated beyond the range of variation encompassed by the original …

The Fierce Green Fire: Vol. 4 Issue 11, Wofford College Environmental Studies Program

The Fierce Green Fire

No abstract provided.

Jefferson Currents: Autumn 2013

Jefferson Currents: The Energy Conservation Newsletter

Dr. Watts' Brilliant Savings: And now, for something completely different, ladies and gentlemen, with a roll of the drums and a blare of trumpets, please..

On the Home Front: Rudolph-approved!

Bright Ideas: A kilowatt saved is a penny earned

Jefferson Currents: Spring 2013

Jefferson Currents: The Energy Conservation Newsletter

Dr. Watts' Brilliant Savings: Here Comes the Bride

On the Home Front: Insulation or How I learned to stuff it

Bright Ideas: The heat's ON but no one's home!

U.S. Drought Monitor, November 19, 2013, Richard R. Heim Jr.

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for November 19, 2013 (11/19/13) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

Recreational Angler Perspectives Of Nonnative Fish Species And Mercury Advisories, Christopher J. Edwards

FIU Electronic Theses and Dissertations

The central Everglades serve as a Wildlife Management Area and as a Water Conservation Area for the Miami-Fort Lauderdale metropolitan area. It is also home to over 22 nonnative freshwater fish species and carries restrictive fish consumption guidelines for Mercury. In my study, boat anglers and canal bank anglers were personally interviewed in the field, to research their awareness and perspectives of these potential environmental and health threats. The study found 78% of anglers were aware of the presence of nonnative fish species, but favored native fish species, and that 69% were aware of mercury advisories, but did not eat …

Skill Assessment Of Multiple Models In The Chesapeake Bay, I. D. Irby, M. Friedrichs, C. Feng, C. Friedrichs

Presentations

No abstract provided.

Soil Building Processes In Reconstructed Tree Islands In The Everglades, Florida, Andres F. Rodriguez

FIU Electronic Theses and Dissertations

Soil building processes were studied in reconstructed tree islands in the Loxahatchee Impoundment Landscape Assessment, Florida. Soil building was evaluated by measuring litter production, litter decomposition, soil accretion, and changes in soil elevation under different hydrologic conditions, and by determining physicochemical characteristics of newly accreted soils. Tree islands showed higher litter production and soil accretion but a larger loss of soil elevation caused by subsidence at higher elevations and shorter inundation periods. Newly accreted soils exhibited higher nutrient concentrations, and organic matter (OM) than older soils. Most of the soil phosphorus was stored in the organic fraction. A positive correlation …

Gathering "Wild" Food In The City: Rethinking The Role Of Foraging In Urban Ecosystem Planning And Management, Rebecca J. Mclain, Patrick T. Hurley, Marla R. Emery, Melissa R. Poe

Environment and Sustainability Faculty Publications

Recent “green” planning initiatives envision food production, including urban agriculture and livestock production, as desirable elements of sustainable cities. We use an integrated urban political ecology and human–plant geographies framework to explore how foraging for “wild” foods in cities, a subversive practice that challenges prevailing views about the roles of humans in urban green spaces, has potential to also support sustainability goals. Drawing on research from Baltimore, New York City, Philadelphia, and Seattle, we show that foraging is a vibrant and ongoing practice among diverse urban residents in the USA. At the same time, as reflected in regulations, planning practices, …

U.S. Drought Monitor, November 12, 2013, David Simeral

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for November 12, 2013 (11/12/13) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

Light Reductions Drive Macroinvertebrate Changes In Amphibolis Griffithii Seagrass Habitat., Adam Gartner, Paul S. Lavery, Kathryn Mcmahon, Anne Brearley, Helen Barwick

Kathryn McMahon

Numerous anthropogenic activities can significantly reduce the amount of light reaching seagrass habitats. Typically these result in morphological and physiological changes to the plant and associated algal epiphytes. However, the flow-on effects to seagrass-dependent fauna induced by these disturbances has yet to be examined. This study investigated the effects of different light reduction intensity (high: ~92% reduction; moderate: ~84% reduction), duration (3, 6 and 9 mo) and timing (post-winter and post-summer) on the density and biomass of macroinvertebrate epifauna within an Amphibolis griffithii seagrass ecosystem (Western Australia). There were generally lower epifauna densities and biomass within shaded seagrass plots. When …

A Guide To Tropical Seagrasses Of The Indo-West Pacific, Michelle Waycott, Kathryn Mcmahon, Jane Mellors, Ainsley Calladine, Diana Kleine

Kathryn McMahon

No abstract provided.

Recovery From The Impact Of Light Reduction On The Seagrass Amphibolis Griffithii, Insights For Dredging Management, Kathryn Mcmahon, Paul Lavery, Michael Mulligan

Kathryn McMahon

A large-scale, manipulative experiment was conducted to examine the extent and rate of recovery of meadows of the temperate Australian seagrass, Amphibolis griffithii to different light-reduction scenarios typical of dredging operations, and to identify potential indicators of recovery from light reduction stress. Shade cloth was used to mimic different intensities, durations and start times of light reduction, and then was removed to assess the recovery. The meadow could recover from 3 months of light stress (5–18% ambient) following 10 months re-exposure to ambient light, even when up to 72% of leaf biomass was lost, much faster recovery rates than has …

Dynamics Of A Cyanobacterial Bloom In A Hypereutrophic, Stratified Weir Pool, Peter Thompson, Anya Waite, Kathryn Mcmahon

Kathryn McMahon

No abstract provided.

Application Of A Novel Phytotoxicity Assay For The Detection Of Herbicides In Hervey Bay And The Great Sandy Straits, Susan Bengston-Nash, Kathryn Mcmahon, Geoff Eaglesham, Joachin Mã¼Ller

Kathryn McMahon

No abstract provided.

Vulnerability Of Seagrasses In The Great Barrier Reef To Climate Change, M Waycott, C Collier, Kathryn Mcmahon, P Ralph, Len Mckenzie, J Udy, A Grech

Kathryn McMahon

No abstract provided.

Herbicide Contamination And The Potential Impact To Seagrass Meadows In Hervey Bay, Queensland, Australia, Kathryn Mcmahon, Susan Bengston-Nash, Geoff Eaglesham, Joachin Mã¼Ller, Norm Duke

Kathryn McMahon

No abstract provided.

Collaborative Research: An Interdisciplinary Investigation Of Groundwater-Carbon Coupling In Large Peat Basins And Its Relation To Climate Change, Andrew S. Reeve

University of Maine Office of Research Administration: Grant Reports

The growth of northern peatlands during the Holocene created a globally important source and sink for greenhouse gases. The response of these large carbon reservoirs to Global Warming, however, remains uncertain. Different mathematical models predict that future warming could alter the carbon balance of peatlands by either increasing the rate of carbon sequestration or accelerating the emissions of greenhouse gases. However, these steady-state analytical models make unrealistic assumptions about natural peatlands, which are spatially and temporally variable ecosystems that are still accumulating carbon. This investigation will therefore develop a transient 3D numerical model that couples multiphase groundwater flow to solute …

The Fierce Green Fire: Vol. 4 Issue 10, Wofford College Environmental Studies Program

The Fierce Green Fire

No abstract provided.