Digital Commons Network^™

Evaluating The Benefits Of A Systems Approach To Particulate Matter Air Pollution Management, Stephanie Janene Fincher

UNLV Retrospective Theses & Dissertations

Although air quality has improved in the United States over the past thirty years, some air quality management areas continue to have serious problems with air pollutants such as particulate matter (NRC 2004). I hypothesize that using a systems approach would have benefits for PM10 management, including improved results and understanding, as well as identification of ineffective policies. A system dynamics model was developed for PM10 in the Las Vegas Valley. Policy analysis revealed real-world behavior, important dynamics of the system, and potentially harmful policies. Results support the importance of a systems and long-term perspective, and show that PM10 pollution …

On The Use Of Lognormal Distribution For Environmental Data Analysis, Devarshi Pant

UNLV Retrospective Theses & Dissertations

Contaminant concentration data from Superfund sites is quite often positively skewed, and the log-normal theory based statistical procedures are typically used for such data. Recent work in the environmental statistics literature, however, has shown that the use of log-normal theory based formulas, such as the H-statistic confidence interval, is problematic. The performance of the H -- UCL in the presence of non -- detects in the sample is investigated via simulated examples. When comparing mean contaminant concentration at a site with that of the background, the 2-sample t-test on log-transformed data is commonly used. A part of this thesis deals …

Second-Home Owner Attachment To A Destination: A Driver Of Tourism Promotion, John Brumby Mcleod

UNLV Retrospective Theses & Dissertations

Second-homes have become common place in many destinations. The visitation to these homes has become known as second-home tourism. Previous literature suggests that these homeowners might possess traits that would be attractive to tourism planners such as repeat visitation, word-of-mouth promotion, and the hosting of other visitors; The purpose of this study was to explore the presence of these traits in the context of international second-home owners and test a theoretical model that proposes place attachment as a driver of these behaviors. Attachment has been shown as a predictor of visitation and positive word-of-mouth in previous research. Borrowing from the …

Precipitation Monitoring At Yucca Mountain, Klaus J. Stetzenbach, Amanda Brandt

Publications (YM)

Objectives:

Status of the Task to Date
Network Overview/ Equipment
Data Trends
Uses and Collaborative Projects
Spatial Interpolation of YM Rainfall
Storm Event Analysis
Shallow Groundwater Response to Rainfall
UE29a1 Water Level Response to Barometric Pressure Fluctuation

Impact Of The Synthesis Process On Structure Properties For Afci Fuel Candidates, Kenneth Czerwinski

Fuels Campaign (TRP)

Synthesis of actinium mononitrides using carbothermic reduction of the corresponding oxides has a few outstanding issues, including the formation of secondary phases such as oxides and carbides and low densities of the final product. Furthermore the requirement of a high process temperature at 1700°C, for more than 12 hours is also a drawback particularly for Americium-bearing samples. Therefore, it is important to explore the use of other possible routes to synthesize actinide mononitrides.

A low temperature process is used in this research to produce actinide mononitrides using a fluoride route in which the first step is to mix the actinide …

Solution-Based Synthesis Of Nitride Fuels, Tyler A. Sullens, Kenneth Czerwinski

Fuels Campaign (TRP)

The preliminary studies into the synthesis of actinide nitride fuels through a low temperature, liquid ammonia based synthesis route have been conducted on the uranium containing system, and there is good indication for the success of synthesizing uranium (III) nitride. The dissolution of iodine in ammonia is a rapid process, resulting in a pale green solution, which does not result in any observable oxidation of iodine. The cannula transfer of dissolved iodine into the reaction vessel containing U metal has been conducted with little to no residual iodine remaining in the original flask. The metal being used for these reactions …

Piscivory By Non-Native Blue Tilapia (Oreochromis Aureus ) In Clark County, Nevada, Shawn C Goodchild

UNLV Retrospective Theses & Dissertations

Fish communities that share an evolutionary history typically have mechanisms to offset impacts presented by other species. Fish, especially non-game species, which are intermingled with non-native species for which they lack a shared history, are often poorly adapted to offset these impacts. Non-native fish affect native fish through predation, competition, displacement, and disease, affects which are often synergistic. Native fish within the Muddy River system (Clark County, Nevada) experienced a precipitous decline in numbers following an illegal introduction of blue tilapia (Oreochromis aureus) during the 1990's. The purpose of this investigation was to determine if tilapia were directly predating upon …

Thermal Control For The Liquid Metal Coolant Circulation Loop, Xiuju Tan

UNLV Retrospective Theses & Dissertations

The target complex facility (TC-1 facility) located at University of Nevada, Las Vegas (UNLV), is serving the fundamental research of thermal-hydraulics and corrosion test of liquid metal coolant lead bismuth eutectic (LBE). A stable thermal condition is the basis for the TC-1 facility to operate and target coolant LBE to circulate throughout the loop made of the main components of TC-1 facility, TC-1 loop. The proper thermal process of the TC-1 loop critically comprises a smooth heating phase, the main intention of which is to warm all the loop components and melt solid LBE; a stable temperature maintenance phase, which …

Chemical Analyses In Support Of Yucca Mountain Studies, Harry Reid Center For Environmental Studies, University Of Nevada, Las Vegas

Publications (YM)

Research Objectives: Provide preparation of injectates, sorption studies and analyses for tracer tests Provide REE, trace metals, majors and field measurement data from wells of the Nye County Early Warning Drilling Program (NCEWDP)and Inyo County Other laboratory needs as they arise

Interagency Science And Research: Quarterly Progress Report, Period Ending December 31, 2006, Margaret N. Rees

Interagency Science and Research Strategy

• Completed draft review and analysis of 6 interagency and 2 single-agency science strategies.
• Developed an outline for a Southern Nevada Agency Partnership Science Strategy based upon these reviews.
• Initiated a beta-test of a science proposal review process.

Lake Mead National Recreation Area Vegetation Monitoring And Management: Quarterly Progress Report, Period Ending December 31, 2006, Margaret N. Rees

Vegetation Monitoring

Executive Summary

• Two new Weed Sentry research assistants were hired.
• Weed Sentry staff surveyed for exotic species on 89 miles of roads on NPS and BLM land and treated more than 21,000 exotic plants in incipient populations.
• A grid-based rare plant monitoring method was tested this quarter.
• A manuscript detailing vegetation succession on a water pipeline at Lake Mead NRA was submitted for review to the journal Crossosoma.
• New integrative projects undertaken this quarter included establishing a competition study between a native grass and the exotic Sahara mustard, salvaging plants for research purposes from private sites with permission from landowners, …

Afci Quarterly Input – Unlv October 1 Through December 31, 2006, Harry Reid Center For Environmental Studies. Nuclear Science And Technology Division

Transmutation Research Program Reports (TRP)

Quarterly report highlighting research projects, activities and objectives of the Transmutation Research Program at the Nuclear Science & Technology Division, Harry Reid Research Center.

The University of Nevada, Las Vegas supports the AFCI through research and development of technologies for economic and environmentally sound refinement of spent nuclear fuel. The UNLV program has four components: infrastructure, international collaboration, student-based research, and management and program support.

Inside Unlv, Diane Russell, Cate Weeks, Shane Bevell, Mamie Peers, Lori Bachand

Inside UNLV

No abstract provided.

Characterization Of Microbial Populations In The Subsurface, Mark P. Buttner, Patricia Cruz, Klaus J. Stetzenbach, Amy J. Smiecinski

Publications (YM)

This task is part of a cooperative agreement between the UNLV Research Foundation and the U.S. Department of Energy (#DE-FC28-04RW12237) titled “Yucca Mountain Groundwater Characterization”. The work was conducted in the Harry Reid Center for Environmental Studies, Microbiology Division of the University of Nevada, Las Vegas from October 1, 2004 to September 30, 2006. The overall goal of this research was to investigate the phenomena that affect the fate and transport of radionuclides in the environment. The purpose of this task (ORD-RF-01), “Characterization of Microbial Activity”, was to develop a molecular biological method for the characterization of the microbial population …

Inside Unlv, Cate Weeks, Brenda Griego, David Ashley, Mamie Peers, Shane Bevell, Gian Galassi

Inside UNLV

No abstract provided.

Unlv Magazine, Cate Weeks, Shane Bevell, Erin O'Donnell, Eric Leake, Lori Bachand, David G. Schwartz, David Ashley

UNLV Magazine

No abstract provided.

Afci Quarterly Input – Unlv July 1 Through September 30, 2006, Harry Reid Center For Environmental Studies. Nuclear Science And Technology Division

Transmutation Research Program Reports (TRP)

Quarterly report highlighting research projects, activities and objectives of the Transmutation Research Program at the Nuclear Science & Technology Division, Harry Reid Research Center.

The University of Nevada, Las Vegas supports the AFCI through research and development of technologies for economic and environmentally sound refinement of spent nuclear fuel. The UNLV program has four components: infrastructure, international collaboration, student-based research, and management and program support.

Community Engagement, Education & Research, Public Lands Institute

Presentations (PLI)

The Public Lands Institute is dedicated to strengthening the national fabric that is essential for the protection, conservation, and management of public lands.

Nshe/Ymp Nuclear Waste Cooperative Agreement, Raymond E. Keeler, Sherry Marks, Administrative Audit Report Team

Publications (YM)

The United States Department of Energy (DOE) and the Nevada System of Higher Education (NSHE) have established a Cooperative Agreement (Co-op) entitled: “Scientific & Engineering Studies of the High-Level Waste Repository at Yucca Mountain (DE-FC28-04RW12232). The Harry Reid Center for Environmental Studies (HRC) administers the Co-op under project activity ORD-FY04-001. In accordance with 10 CFR 600.150, the HRC conducted an audit for the purpose of managing and monitoring project activities supported under the Co-op. The audit was limited to an investigation of technical productivity and schedule. Financial compliance and quality assurance compliance issues were outside the scope of this audit. …

Department Of Family Services: Adoption Program Evaluation, Bonnie Abramson, Kristy Amasaki, Michael N. Johnson, James Padgett

UNLV Theses, Dissertations, Professional Papers, and Capstones

Persons contemplating adoption in Clark County face many legal boundaries and lengthy delays. Since adoption is a creature of Clark County, the answers usually can be found in state statutes, agency regulations, and court opinions. Federal statutory and constitutional laws also play a huge part in such areas as adoption subsidies, adoption of children with special needs, and training of all adoption workers.

While the overall adoption program is similar in all states, the fine points frequently differ. This research outlines the legal foundation of adoption, describing the adoption legal process, and the workings of the Department of Family Services …

Inside Unlv, Cate Weeks, Shane Bevell, Diane Russell, Leora Baron

Inside UNLV

No abstract provided.

Unlv Magazine, Carol C. Harter, Karen Sharp, Gian Galassi, Tony Allen, Jennifer Lawson, Shane Bevell, Lori Bachand, Regina Vaccari, Pete Codella, Cate Weeks, Erin O'Donnell, Diane Russell, Phil Hagen

UNLV Magazine

No abstract provided.

Afci Quarterly Input – Unlv April 1 Through June 30, 2006, Harry Reid Center For Environmental Studies. Nuclear Science And Technology Division

Transmutation Research Program Reports (TRP)

Quarterly report highlighting research projects, activities and objectives of the Transmutation Research Program at the Nuclear Science & Technology Division, Harry Reid Research Center.

The University of Nevada, Las Vegas supports the AFCI through research and development of technologies for economic and environmentally sound refinement of spent nuclear fuel. The UNLV program has four components: infrastructure, international collaboration, student-based research, and management and program support.

Education In The Environment: A Hands-On Student Research And Outdoor Learning Experience: Quarterly Progress Report, Period Ending May 31, 2006, Margaret N. Rees

Reports (PLI Education)

During the past three months, the focus of the university’s efforts has included the following highlights:

• Forever Earth was scheduled for 18 days and benefited more than 400 individuals.
• Curricula for 5th, 6th, and 7th grades were created for the Forever Earth program; pre- and post-trip activities were also written.
• Activities for 5th and 6th grades were field tested on 7 Forever Earth trips.
• A 1000-gallon fuel donation was contributed to the Forever Earth program by Overland Petroleum Company, St. George, Utah.
• The Forever Earth marketing plan was completed.
• 12 Discover Mojave Outdoor World events were conducted for 104 participants; …

Criticality Studies Of Dilute Plutonium Mixtures For Urex Processes, Denis Beller

Separations Campaign (TRP)

The completion of criticality experiments for mixtures of higher actinides (HA, includes neptunium, plutonium, americium, and curium) that will be created during the separation of used nuclear fuel has been identified as a requirement to construct prototype plants such as the Engineering-Scale Demonstration (ESD) and the Advanced Fuel Cycle Facility (AFCF) for the Global Nuclear Energy Partnership (GNEP). GNEP is a program to develop a worldwide consensus to enable the expanded use of economical, environmental nuclear energy to meet growing electricity demand. In this program and the Advanced Fuel Cycle R&D program (AFC) that supports it, we are developing economic …

Odonates At The Clark County Wetlands Nature Preserve: A Look At Habitat And Relative Abundance, Erin Jolley

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to identify the various species, relative abundance and habitat of dragonfly and damselfly larvae at the Clark County Wetlands Park Nature Preserve (WPNP). An accurate assessment of these insects can be useful in interpreting potential indications of environmental problems at the Wetlands. From this data, necessary improvements can be made to the dragonfly habitat as well as the habitat of other surrounding organisms. Habitat identification is considered especially important because it is "structured by instream and surrounding topographical features, and is a major determinant of aquatic community potential" (Southwood, 1977). For purposes of this …

Inside Unlv, Diane Russell, Shane Bevell, Carol C. Harter, Lori Bachand, Cate Weeks, Mamie Peers

Inside UNLV

No abstract provided.

The Contribution Of Environmental Variables On Small Mammal Species Richness And Relative Abundance In Eastern Nevada, Stephanie Harris

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to determine how four environmental variables: elevation, latitude, soil type, and vegetation impact the relative abundance of Peromyscus maniculatus and the species richness of small mammal populations in Eastern Nevada. In order to complete this study, a survey of small mammals was completed in the following 8 Eastern Nevada valleys: Delamar, Dry Lake, Dry Lake- Muleshoe,Cave, Lake, Snake, Spring, White River. In each valley, transects of Sherman live traps will be set up for 3 consecutive nights (O'Farrell et al 1977). Data on elevation, latitude, soil type, and vegetation were taken at each trap …

The Fate And Transport Of Nitrogen (N) And The Effect Of Emergent Plants On Natural Treatment Of N-Species At Las Vegas Wash, Nevada, Tanju Kiriscioglu

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to analyze the effect of emergent plant communities at Las Vegas Wash (the System) using a system dynamics modeling approach. Understanding the dynamics of nitrogen (N —major polluting nutrient in the Wash) that enters the System is important because it occasionally causes algal blooms, choking Lake Mead through excessive eutrophication. Emergent plant communities are an integral part of wetland ecosystems and they play a crucial role in natural treatment of nutrients. This study is intended to test this hypothesis.

The study makes use of Wash data from reliable sources (Las Vegas Valley Water District, …

Anaerobic Digester Use In Dairy Farms In The United States, Shaun Elsasser

UNLV Theses, Dissertations, Professional Papers, and Capstones

Anaerobic digestion is a highly efficient process, trapping the methane gas from cow manure and processing it into energy. The steep initial capital costs make anaerobic digesters short-term liabilities, but the long-term benefits far outweigh the long-term costs. An anaerobic digester unit will begin to show a profit after approximately five years of operation. During the lifetime of the unit, estimated at 15 years, the digester will have produced about $ 1,000,000 in profits for the dairy farm, while also providing invaluable benefits to society as a whole.