Digital Commons Network^™

Modeling Of A Novel Solar Down Beam Test Facility Utilizing Newtonian Optics, Ryan J. Hoffmann

UNLV Theses, Dissertations, Professional Papers, and Capstones

As advances in concentrated solar energy progress there will inevitably be an increase in the demand of resources for testing new conceptions. Currently, there are limited facilities available for taking concentrated solar energy concepts from the laboratory bench scale to the engineering test scale. A proposed solution is a scientific and developmental facility that provides highly concentrated solar energy at ground level. The design presented is a solar down beam test facility utilizing a Newtonian optics approach with a flat rectangular down beam mirror to reflect and concentrate the sun's rays at ground level.

Literature review suggests a hyperbolic reflector …

Parallel Machines Scheduling With Applications To Internet Ad-Slot Placement, Shaista Lubna

UNLV Theses, Dissertations, Professional Papers, and Capstones

We consider a class of problems of scheduling independent jobs on identical, uniform and unrelated parallel machines with an objective of achieving an optimal schedule. The primary focus is on the minimization of the maximum completion time of the jobs, commonly referred to as Makespan (C _max ). We survey and present examples of uniform machines and its applications to the single slot and multiple slots based on bids and budgets.

The Internet is an important advertising medium attracting large number of advertisers and users. When a user searches for a query, a search engine returns a set of results …

Development Of A Simulation Tool For Analysis Of Freeway Crashes Due To Cell Phone Usage, Sourabh Sriom

UNLV Theses, Dissertations, Professional Papers, and Capstones

Research shows that drivers are susceptible to numerous distractions while driving which can be held responsible as the reason of a crash. Usage of cell phones, i.e. talking or texting while driving is considered one of the prominent distractions which causes a crash. This dissertation aims to study the number of crashes occurring on the freeways and their relation with the drivers of these cars using cell phones while they are driving. Since crashes occur relatively less frequently, the study of crashes is done using what is called the "rare event" theory. Java based simulations are done to model a …

Fall Prevention Training And Its Impact To Southern Nevada Construction Workers, Vedaspati Joshi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Death and injury from falls are a long-standing and continuing problem in construction, responsible for at least a third of the construction deaths in the U.S. from 2004 to 2007. Each of those years, Nevada has exceeded the national percentage. Although 29 CFR 1926.503 sets forth Occupational Safety and Health Administration (OSHA)'s requirements that construction employers train employees exposed to fall hazards and document such training, the incidence of deaths and injuries from falls are an indicator that this training was not provided or else was not effective.

Conventional fall protection training is more narrowly focused on recognizing fall hazards …

Modeling Passive Solar Distillation Production In Las Vegas, Nevada, Noe I. Santos

UNLV Theses, Dissertations, Professional Papers, and Capstones

A study has been performed to examine the effects of daily weather on the performance of commercial solar distillation basins (solar stills). The objectives of this study were to evaluate the long term performance of solar stills, to instrument two solar stills and record sub-hourly thermal properties, to evaluate existing heat transfer modeling methods for hourly production, and to create new models to predict daily production using experimental distillate production and local weather data by utilizing artificial neural networks, genetic algorithms, and multivariate regression. A system dynamics model was also created to determine the required basin area and storage volume …

Bryoecology In The American Southwest: Patterns Of Biodiversity And Responses To Global Change, John Carroll Brinda

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation combines investigation of the large-scale responses of bryophyte species diversity and distribution with small-scale physiological adaptations to global change. These two areas of inquiry are linked because one way to predict plant species responses to global change is to examine their distribution across current ecological gradients produced by factors such as latitude and elevation. By examining these biogeographic patterns one can identify those species that have a narrow tolerance and therefore are most sensitive to change. Selected bryophytes might then be used as indicator species in long-term monitoring programs. Where historical data exist, these can be used to …

Hydroclimatic Forecasting In The Western United States Using Paleoclimate Reconstructions And Data-Driven Models, Christopher Allen Carrier

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis investigated climate variability and their associated hydrologic responses in the western United States. The western United States faces the problem of water scarcity, where the management and mitigation of available water supplies are further complicated by climate variability. Climate variability associated with the phases of oceanic-atmospheric oscillations has been shown to influence streamflow and precipitation, where predictive relationships have led to the possibility of producing long-range forecasts. Based on literature review, four oceanic-atmospheric oscillation indices were identified in having the most prominent influence over the western United States including the El Niño - Southern Oscillation (ENSO), Pacific Decadal …

A Diffusion Tensor Imaging Software Comparison And Between Control Subjects And Subjects With Known Anatomical Diagnosis, Michael C. Moore

UNLV Theses, Dissertations, Professional Papers, and Capstones

Diffusion weighted imaging (DWI) is a magnetic resonance imaging (MRI) method that produces in vivo images of biological tissues weighted with the local micro-structural characteristics of water diffusion. Diffusion tensor imaging (DTI), a form of DWI, is useful when a tissue, such as the neural axons of white matter in the brain, has an internal fibrous structure that allows water to diffuse more rapidly in alignment with the fibers. Changes in the water diffusion pattern indicate changes in the fiber structure which can result from damage to the fibers. Measurements of the water diffusion patterns include overall diffusivity, Apparent Diffusion …

Effects Of High-Impedance-Contrast Boundary Upon Multi-Modal Seismic Surface Wave Data, Prajwol Tamrakar

UNLV Theses, Dissertations, Professional Papers, and Capstones

Synthetic studies and analyses of an experimental dataset were conducted to address the use of Rayleigh-type surface waves for estimation of shear wave velocity (VS) profiles of shallow bedrock sites. The shallow bedrock presents a high impedance contrast boundary which causes surface wave energy to be partitioned to higher modes. Idealized studies of hypothetical datasets and root-mean-squared calculations of error surfaces showed that if reliable dispersion data are available over a broad frequency spectrum, the VS profile can be recovered using the fundamental mode alone. However, when dispersion data are limited to a relatively narrow frequency band representing what might …

Fenestration Studies On Building Energy Using The Facade Evaluation Facility, Wendell Cocina

UNLV Theses, Dissertations, Professional Papers, and Capstones

The project was developed to assess several types of facades and their influence on building energy, mainly focused on windows and other building fenestrations. Requirements for the facility are stated in this paper alongside corresponding solutions. The facility is designed to represent a section of a building façade. Experimenting on a wide range of fenestrations including windows with integrated PV elements was the primary prerequisite. The option of removable façade configurations was used and allowed testing specimens to be changed effortlessly. Instrumentation and data acquisition are discussed including calibration and uncertainty analysis. Investigation of the air conditioning unit was concluded …

Microbial Impacts On Endocrine Disrupting Contaminants: Las Vegas Wash And Lake Mead, Nevada, Susanna May Blunt

UNLV Theses, Dissertations, Professional Papers, and Capstones

International concern over endocrine disrupting chemicals (EDCs) has become heightened in recent years as more studies reveal their persistence in the environment and their detrimental effects on wildlife. However, little is known about the role of microorganisms in the fate and transport of these compounds in surface waters. Las Vegas Wash, a stream flowing into Lake Mead and fed primarily by treated wastewater effluent, provided a unique experimental system in which to study the role microorganisms play in the dispersal of these compounds in aquatic systems. Samples were collected from the Las Vegas Wash downstream of the Las Vegas Valley's …

The Autonomy House: Team Las Vegas Conceptual Design, University Of Nevada, Las Vegas. Solar Decathlon Team.

DesertSol: Planning and Design

An overview of a net-zero energy concept house developed for the 2013 Solar Decathlon. Document uses original project name "Autonomy House".

Team Las Vegas Solar Decathlon 2013: Technical Proposal, University Of Nevada, Las Vegas. Solar Decathlon Team.

DesertSol: Planning and Design

Team Las Vegas is proposing an elegant, sustainable, and innovative home design that aims to be net zero energy as part of participation in the 2013 Solar Decathlon supported by the Department of Energy and the National Renewable Energy Laboratory (NREL). The home will be constructed and tested at the 2013 Solar Decathlon competition at a location to be determined by NREL. Imagine a home that captures energy instead of reflecting sunlight; one that filters rainwater and sequesters carbon in its vegetation and soils; one that actually gives back to the ecosystem in which it resides, and supports sustainability for …

Sustainability And Climate Models For The Intermountain West: An Annotated Bibliography, Marianne A. Buehler, William E. Brown Jr.

Brookings Mountain West Publications

This resource on climate models and sustainability in the Intermountain West, a region that includes the states of Arizona, Colorado, Idaho, Nevada, New Mexico, and Utah, is a collaborative effort between the UNLV Libraries (http://library.unlv.edu/) and Brookings Mountain West (http://brookingsmtnwest.unlv.edu/).

The selected citations include academic, government, and non-profit information that highlight ongoing research on climate models and sustainability efforts in the region. The websites, government studies, independent reports, scholarly articles, and media reports reflect the diversity and complexity of climate change and sustainability issues in a region that contains widely varying ecosystems. The Intermountain West, with its deserts, basins, mountains, …

Unlv - Ccsd Collaborative English Language Learners, Sylvia R. Lazos, Leann Putney, Ralph E. Reynolds

Policy Briefs and Reports

This proposal will provide statistical context of the overall performance of English Language Learner (ELL) students in Clark County School District (CCSD) and proposes a study that will assist the CCSD in identifying programs and strategies that increase ELL student performance on the third grade State mandated Criterion Reference Test (SMCRT) in reading and mathematics. To accomplish this goal, the proposed research project will first identify teaching methodologies, curricular strategies and support services that CCSD teachers are employing to assist ELL students in achieving satisfactory performance. These factors will be analyzed in comparison to SMCRT scores to determine the relative …

Education In The Environment: A Strategy For Continued Interagency Outdoor Education Programming: Round 6 Project Compendium, Margaret N. Rees

Reports (PLI Education)

The essence of public land stewardship lies far beyond the words, numbers, and pictures compiled in this project compendium. During the past seven years, many people have gained greater appreciation of the discovered and yetto‐ be discovered treasures held within the Southern Nevada public lands. People have had the opportunity to learn about and make a first‐time connection with nature and the community within which they live. Some participants realized dynamic and everlasting changes in their lives as a result of their new experiences and insights.

Education in the Environment was a four‐year collaborative effort of the Southern Nevada Agency …

Take Pride In America Phase Iii: Quarterly Progress Report, Period Covering July 25, 2011-October 24, 2011, Margaret N. Rees

Anti-littering Programs

• The GIS database was field tested.
• Three youth groups began the Hector’s Helpers curriculum.
• America Recycles Day event planning occurred.
• Forms were developed for the volunteer monitoring program.

Unlv Mcnair Scholars Institute Twelfth Annual Research Poster Presentation And Reception, William Sullivan, Deanna R. Davis

McNair Poster Presentations

Grounded in the inspiration and vision of Challenger astronaut Dr. Ronald E. McNair, this program began at The Center in 1999. The Ronald E. McNair Scholars Institute at UNLV is committed to diversify-ing the ranks of American faculty and research institutions by encour-aging and preparing undergraduate students who are members of un-der-represented groups to purse doctoral studies. The McNair program is designed to prepare undergraduate students for doctoral study and to pursue careers in college teaching. McNair participants are stu-dents from low-income, first-generation backgrounds, and/or members of underrepresented groups in graduate education.

An important aspect of the McNair Scholars Institute …

Walking Box Ranch Planning And Design Quarterly Progress Report: Period Ending October 10, 2011, Margaret N. Rees

Walking Box Ranch

• UNLV participated in two meetings with BLM regarding updating the current Task Order, obtaining a two-year no-cost extension for the two Assistance Agreements, and to develop the future WBR operating agreement between BLM and UNLV.
• Weather station progress included: 1) A study to review the recent developments in various building envelope components and their effects on the energy sustainability of a building has been completed and published, 2) Ground-source heat pump (GSHP) Vs Photovoltaic (PV) technology: A detailed comparison of ground source heat pumps and photo voltaics has been initiated, 3) A study to identify the most suitable and economically …

Take Pride In America In Southern Nevada: Quarterly Progress Report, Period Covering July 6, 2011-October 5, 2011, Margaret N. Rees

Anti-littering Programs

• A total of 6 clean-up events were conducted this quarter.
• Interagency cooperation continued.
• Recycling containers were distributed to agencies for use at public events.
• Website redesign continued.

Effects Of Climate Change On Spring Ecosystem Hydroecology As A Guide To Developing Alternative Water Policies, Scott Mensing, Saxon E. Sharpe, Scott Bassett, Don Sada, Jim Thomas

Climate Change Seminar Series (NNE)

Hydroecology: the interface of ecological systems and water which combines the scientific disciplines of hydrology and ecology

Goal: evaluate the hydrologic and climate history using pollen, loss on ignition, total inorganic carbon, and invertebrates from spring sediments in Spring Valley, Eastern Nevada and Snake Valley, Western Utah

Mojave Applied Ecology Notes Fall 2011, E. Cayenne Engel, Scott R. Abella, Kathryn A. Prengaman, Jason Whited, Peter Michel

Mojave Applied Ecology Notes

Paper on impacts of Mojave wildfires through time published, possibilities of catastrophic Mt. Charleston forest fires, vegetation mapping at three national parks, UNLV library’s special collections, and the benefits of scientific publications to managers and stakeholders

Hrc Enews — 2011 Fall, Megan K. Svarz

Publications (HRC)

This issue contains staff accomplishments and announcements, event listings, and a "new faces" listing for new staff, affiliates, and researchers.

Asc Newsletter, Academic Success Center, University Of Nevada, Las Vegas

Academic Success Center Newsletter

This issue includes a message from the dean, articles about faculty, student achievement and student activities.

Seeking Further Education: A Rubric For Evaluating Organizational Behavior Phd Programs, Douglas M. Quist

UNLV Theses, Dissertations, Professional Papers, and Capstones

Statement of Objective

The objective of this study is to first understand the origins and history of organizational behavior. In addition, this study will analyze five organizational behavior programs at the following schools: Harvard, Stanford, Purdue, Cornell, and University of Utah. These schools have highly publicized marketing programs and range in their business school rankings. The rubric will serve many functions but will primarily use as a guide for acquiring a greater understanding of said programs. There is a plethora of information available and this study will organize and simplify such information from five universities. Looking at programs side by …

Developing An Employee Training Addendum For A Sustainable Hospitality Operation, Devonne A. Williams

UNLV Theses, Dissertations, Professional Papers, and Capstones

As sustainability has become an important part of everyday life for American consumers, it is important that the hospitality industry do whatever it takes to meet their needs. Consumers expect businesses that they patronize to have policies in place for waste reduction, air and water conservation, and improved air quality and environment. Without the support of the front line employees, however, a hospitality operation has no chance to obtain sustainable success in these arenas. By creating addendums to previously existing employee handbooks, businesses are able to provide their employees with new policies and expectations of sustainable behaviors. This professional paper …

Nevada Interagency Volunteer Program: Helping Hands Across Public Lands – Phase Ii: Quarterly Progress Report, Period Covering July 1, 2011 To September 30, 2011, Margaret N. Rees

Get Outdoors Nevada

• The number of records in the volunteer database increased 5% from last quarter. The database now contains 8,918 records.
• Results show an average of 1,170 visits per month, and with an average of 2,681 pages viewed per month.
• Six National Public Lands Day events have been completed.
• The Interagency Volunteer Standard Operations Manual has been updated and made available to all other SNAP teams.
• Get Outdoors Nevada supported 16 volunteer events in a variety of ways. These events utilized approximately 600 volunteers whom contributed approximately 2,500 hours of service.
• Preparations for the 11/5/11 volunteer recognition banquet continued.

Limnological Assistance For Lake Mead National Recreation Area: Quarterly Report, Period Ending September 30, 2011, Margaret N. Rees

Limnological Studies

Project 1

• Technical assistance with the implementation of the Interagency Monitoring Action Plan (I-MAP) for Quagga Mussels is ongoing. During this quarter, processing of all 2010 juvenile/adult samples was completed; remaining analyses are underway. The project team assisted NPS with 2011 collections.
• A final report on Veliger abundance and settlement at different depths of Lake Mead is in preparation for delivery at the end of November 2011; sample analysis continues for Growth of adult quagga mussels within Las Vegas Wash/Las Vegas Bay with report delivery planned for the end of November 2011.
• The Interagency Quagga Mussel Meeting was held on …

Education In The Environment: A Strategy For Continued Interagency Outdoor Education Programming: Quarterly Progress Report: Period Ending August 31, 2010, Margaret N. Rees

Reports (PLI Education)

Highlights of the university’s focused efforts during the past three months include the following:

• One Families in Nature event was held, benefitting approximately 40 people.
• A media campaign has been developed for the Nevada Children’s Outdoor Bill of Rights.
• A total of18 people are participating in the fourth cohort of the Nevada State Certification in Environmental Education and Interpretation.
• An RV has been purchased for the SNAP Mobile Exhibit and is in process of being retrofitted.
• Forever Earth was scheduled for 16 days and benefited 425 individuals.
• The National Park Service used Forever Earth as a mobile visitor center on …

Development Of Dose Conversion Coefficients For Radionuclides Produced In Spallation Neutron Sources, Phillip W. Patton

Transmutation Sciences Physics (TRP)

A research consortium comprised of representatives from several universities and national laboratories will be established as part of this project to generate internal and external dose conversion coefficients for radionuclides produced in spallation neutron sources. Information obtained from this multi-year study will be used to support the siting and licensing of future accelerator-driven nuclear initiatives within the U.S. Department of Energy complex, including the Spallation Neutron Source (SNS) and Accelerator Production of Tritium (APT) projects. Determination of these coefficients will also fill data gaps for several hundred radionuclides that exist in Federal Guidance Report (FGR) No. 11 and in Publications …