Digital Commons Network^™

Optimal Design Of Vehicle With Internal Space Frame Structure Subjected To High Impact Load, Jagadeep Thota

UNLV Theses, Dissertations, Professional Papers, and Capstones

Armored military vehicles are heavily used in modern warfare. These vehicles are subjected to lethal attacks from projectiles and land mines. The shocks from these attacks may risk the safety of the occupants and damage the electronic instruments within the vehicle. Extensive research on the analysis and reduction of shocks on civilian vehicles has been performed. Fewer researchers addressed these problems in the case of military vehicles. Space frames are usually used to enhance structural strength of the vehicle while reducing its overall weight. These frames comprise of beams connected together at joints. Recently, space frames were incorporated in military …

Conservation Based Uncertainty Propagation In Dynamic Systems, Lillian J. Ratliff

UNLV Theses, Dissertations, Professional Papers, and Capstones

Uncertainty is present in our everyday decision making process as well as our understanding of the structure of the universe. As a result an intense and mathematically rigorous study of how uncertainty propagates in the dynamic systems present in our lives is warranted and arguably necessary. In this thesis we examine existing methods for uncertainty propagation in dynamic systems and present the results of a literature survey that justifies the development of a conservation based method of uncertainty propagation. Conservation methods are physics based and physics drives our understanding of the physical world. Thus, it makes perfect sense to formulate …

Evaluating The Impacts Of Water Conservation Policies On Water Demand, Availability And Outdoor Water Use In The Las Vegas Valley, Kamal Qaiser

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Las Vegas Valley, located in the arid Southern Nevada region, with a growing population, limited water resources, and a prolonged drought, faces a challenge in meeting its future water needs. Southern Nevada Water Authority (SNWA), the main water management agency in the Valley, is focusing on water conservation to reduce water demand. Current water use is 945 lpcd (250 gpcd) which SNWA aims to reduce to 752 lpcd (199 gpcd) by 2035. Presently the indoor outdoor water use proportion is about 40:60 in the Valley. An important component of the Valley's supply are the return flow credits which SNWA …

High School Student Interests In Architecture, Construction, And Engineering Education, Krishna P. Kisi

UNLV Theses, Dissertations, Professional Papers, and Capstones

It is a common and widely held belief that the greatest influencing factor for high school students to enter an architecture-, construction-, or engineering-education program is because either their parents, relatives or friends work or have worked in the industry. However, there is little research that supports this belief. The focus of this research was to analyze characteristics and academic interests of Clark County School District (CCSD) Career and Technical Academies (CATA) students enrolled in architecture, construction and engineering (ACE) curricula.

This research analyzed data collected from a survey conducted by CCSD of their students enrolled in ACE courses. Comprehensive …

Use Of Task-Value Instructional Inductions For Facilitating Engagement And Conceptual Change, Marcus L. Johnson

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this study, 166 undergraduates from an Educational Psychology subject pool were randomly assigned to different task value instructional inductions (utility, attainment, and control) to determine whether inducing students with differing task values would be effective and result in different degrees of engagement for a learning task, as well as result in different degrees of conceptual change on the topic of the causes of the common cold. It was hypothesized participants would adopt characteristics that were consistent with the task value with which they were induced, that the participants in the utility, attainment, and control conditions would differ in their …

Investigation Of Potential Pathways And Multi-Cycle Bioregeneration Of Ion-Exchange Resin Laden With Perchlorate, Mohamadali Sharbatmaleki

UNLV Theses, Dissertations, Professional Papers, and Capstones

Ion-exchange (IX) is possibly the most feasible technology for perchlorate removal and perchlorate-selective and non-selective IX resins are commercially available for this purpose. The use of both resins has shortcomings. Selective resins are incinerated after one time use, and non-selective resins produce a regenerant waste stream that contains high concentration of perchlorate. A process involving directly contacting of spent IX resin containing perchlorate with perchlorate-reducing bacteria (PRB) to bioregenerate the resin has been developed and proven recently. In this process PRB biodegrade perchlorate ions which are attached to the functional groups of the resin.

Although its feasibility has been proven, …

Fabrication, Characterization And Simulation Of Non-Lithographic Nanostructures And Their Potential Applications, Neelanjan Bhattacharya

UNLV Theses, Dissertations, Professional Papers, and Capstones

The dissertation describes the formation of porous silicon through the pores of porous alumina on a silicon substrate. Porous silicon, by itself, is inherently a non-uniform material that has non-uniform optical and electronic properties. In addition, it is also mechanically fragile material requiring careful material handling. The porous silicon fabricated through the nanosized pores of porous alumina are expected to mitigate these problems, thereby enhancing commercial viability of the device. The porous silicon as well the porous alumina have been synthesized through anodisation for various parameters and also various types of anodizing electrolytes. The porous silicon, so obtained have been …

The Effects Of Contact Metamorphism On The Host Rocks For Carlin-Type Mineralization At The Getchell Development, Nevada, Usa, Nathan C. Eck

UNLV Theses, Dissertations, Professional Papers, and Capstones

Carlin-type gold deposits (CTGDs) result from low to moderate temperature hydrothermal systems which form replacement bodies in carbonate or calcareous host rocks. The Getchell CTGD is located on the Getchell trend in north central Nevada. The Eocene age mineralization is locally hosted within the metamorphic aureole of the Cretaceous age Osgood stock. Previous studies have noted that the effects of the contact metamorphism can be heterogeneous, with strongly calc-silicate altered carbonates transitioning to relatively pristine limestone over short distances. The main finding of this study was that the variability in calc-silicate alteration is largely dependent on the differing host lithologies …

Cloud Storage And Online Bin Packing, Swathi Venigella

UNLV Theses, Dissertations, Professional Papers, and Capstones

Cloud storage is the service provided by some corporations (such as Mozy and Carbonite) to store and backup computer files. We study the problem of allocating memory of servers in a data center based on online requests for storage. Over-the-net data backup has become increasingly easy and cheap due to cloud storage. Given an online sequence of storage requests and a cost associated with serving the request by allocating space on a certain server one seeks to select the minimum number of servers as to minimize total cost. We use two different algorithms and propose a third algorithm; we show …

Field Measurement & Verification Of Residential Duct Leakage Methods And Cfd Analysis Of Hvac Mixing Box, Uday Vadlamani

UNLV Theses, Dissertations, Professional Papers, and Capstones

The research work in this thesis is subdivided to providing the initial results of the experimental work followed by simulation work at the end. The experimental work proposes a new measurement technique for measuring total and local leakages in ducts. The experimental work in this research tries to focus effort on finding the approximate locations of leaks in the HVAC residential duct systems to direct better the effort of duct sealing. This technique can provide several advantages over existing techniques. It will eventually have a greater potential to locate leaks so that retrofitting in ducts can be focused on leaky …

Arima Model For Forecasting Poisson Data: Application To Long-Term Earthquake Predictions, Wangdong Fu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Earthquakes that occurred worldwide during the period of 1896 to 2009 with magnitude greater than or equal to 8.0 on the Richter scale are assumed to follow a Poisson process. Autoregressive Integrated Moving Average models are presented to fit the empirical recurrence rates, and to predict future large earthquakes. We show valuable modeling and computational techniques for the point processes and time series data. Specifically, for the proposed methodology, we address the following areas: data management and graphic presentation, model fitting and selection, model validation, model and data sensitivity analysis, and forecasting.

Wind Flow Modeling For Wind Energy Analysis Of The Nellis Dunes Area In Nevada, Upendra Rangegowda

UNLV Theses, Dissertations, Professional Papers, and Capstones

A wind energy analysis of the Nellis Dunes area in Nevada was conducted. A DEM file which contains the elevation data was used to generate the surface model and to create a 3-D mesh of the region. Local meteorological tower data collected for a period of one year was used to generate the diagnostic initial wind fields. Upper level wind fields were created using a surface boundary layer technique along with linear interpolation of the tower level wind fields. The vertical components of the velocities were adjusted using the equation of continuity. Mass consistent 3-D wind fields were then calculated …

Automated Procedures For Quantification Of Rhizosphere Physical Properties In Micro Ct Images, Natarajan S. Pillai

UNLV Theses, Dissertations, Professional Papers, and Capstones

The rhizosphere, i.e. the zone of soil immediately surrounding plant roots plays a prominent role in supplying plants with water and nutrients. However, surprisingly little is known about rhizosphere physical properties and how they affect root growth, water and nutrient uptake. The lack of non-invasive and non-destructive imaging techniques necessary to observe living roots growing in undisturbed soil have been a main reason for this shortcoming. Recent advances in synchrotron X-ray micro tomography (CMT) provide the potential to directly observe soil physical properties around living roots in-situ.In this work we develop procedures for assisting scientist to study the soil properties …

The Live Experience Of Non-Degree Learners From A Time Modified Traditional Baccalaureate In Nursing Program, Stephanie S. Deboor

UNLV Theses, Dissertations, Professional Papers, and Capstones

By the year 2016, it is projected that a million new and replacement nurses will be needed throughout the United States. The traditional 4-year baccalaureate program alone cannot adequately sustain this demand. The immediacy of the current nursing shortage demands our educational systems respond by building and maintaining a workforce that is sufficient to support the health care needs of our society. In an attempt to meet this challenge, nursing schools around the country began exploring the option of creating accelerated programs for those who already possess a bachelor's degree in another field without compromising the integrity and quality of …

Neutron Flux And Energy Characterization Of A Plutonium-Beryllium Isotopic Neutron Source By Monte Carlo Simulation With Verification By Neutron Activation Analysis, Zachary R. Harvey

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this research was to characterize the neutron energy distribution and flux emitted from the UNLV plutonium-beryllium source, serial number MRC-N-W PuBe 453. This was accomplished through the use of the MCNPX/5 Monte-Carlo particle transport code to simulate radiation interactions within the physical environment of the source and its surroundings. The moderating drum currently containing the source as well as all of the sampling ports were accurately modeled in MCNPX/5. This geometry was then used to simulate the neutron interactions taking place in these geometries. The results of the simulations were then verified by the use of specifically …

Hotel Feasibility In The Recessionary Economy Of 2010: A Case Study In Reno, Nevada, Sang-Mun Cho

UNLV Theses, Dissertations, Professional Papers, and Capstones

In the aftermath of the economic crisis of 2008, it became evident that Nevada’s economy felt pains greater than that of the rest of the country. With sinking property values, opportunities may exist for the hotel investor. The purpose of this paper is to analyze the risks and benefits of acquiring a hotel property through the instrumentality of a hotel feasibility report. The literature review includes an evaluation of hotel feasibility analysis, its historical context, criticisms, and recommendations for performing effective studies. The case study part of this paper investigates the broader implications of hotel acquisition in the current recessionary …

Take Pride In America In Southern Nevada: Quarterly Progress Report, Period Covering April 5, 2010 – July 4, 2010, Margaret N. Rees

Anti-littering Programs

• With Board approval, the next phase of the Don’t Trash Nevada marketing campaign began.
• The Hector’s Helpers program with the Clark County School District began curriculum development.
• The team participated in the strategic planning process for Keep Las Vegas Beautiful.
• The team met with the Education Director of Keep America Beautiful to begin the process of developing a statewide program.
• The team continued to develop the GIS database.
• A total of 15 clean-up events were conducted this quarter.

The Suzuki Diaries: Sustainability In Action, Thomas A. Ipri

Library Faculty Research

Given the number of gloom and doom environmental films flooding the market, the more optimistic approach of The Suzuki Diaries: Sustainability in Action is refreshing. David Suzuki, geneticist, environmentalist, author and broadcaster, takes his daughter, Sarika, around Europe to investigate some of the more proactive approaches various countries have take that lessen their impact on the environment. Suzuki is quick to note that many of these projects were not done to help the environment, per se, but done for practical, economic and quality of life reasons.

The Greenprint: Nevada’S Environmental Literacy Plan, Part 1, Education About The Environment

Education about the Environment

President Obama’s “Blueprint for Reform” includes environmental education in part because research has demonstrated significant benefits from environmental education, including impacting student test scores in science, reading, math, and social studies. Additionally, studies have shown that environmental education can reduce discipline problems, increase attendance, and develop leadership and other social skills. Other important benefits include increased engagement, motivation, and enthusiasm for learning. The National Science Board of the National Science Foundation recognizes the importance of environmental education to student learning in their 2000 report, Environmental Science and Engineering for the 21st Century.

The need for environmental literacy arises from the …

Evaluating Efficacy Of Restoration Techniques, Keys View Road Reconstruction, Joshua Tree National Park, California, U.S.A, Scott R. Abella, E. Cayenne Engel

Public Policy and Leadership Faculty Research

Keys View Road in Joshua Tree National Park (JOTR) was recently repaved, resulting in a buffer of vegetation and soil disturbance along the road corridor. In order to mitigate the effects of the repaving, JOTR designed an experimental framework to test various revegetation strategies. They outplanted salvaged and nursery grown native plant species in conjunction with vertical mulch in a fully crossed design (outplanting only, vertical mulch only, outplanting + vertical mulch, bare ground) to examine if any of the treatments most efficiently establish native plant communities.

Survey Of Resource Managers Completed On Monitoring And Management Actions For Rare Plants In Arizona And Nevada, Scott R. Abella

Public Policy and Leadership Faculty Research

In a collaborative project with Northern Arizona University and more than 35 resource managers in Arizona and Nevada, we completed a survey of monitoring and management activities that are ongoing in these states for conserving populations of rare plants. We sent questionnaires consisting of 16 questions to as many resource managers as possible in these states and had follow-up conversations with several managers willing to share their perspective on ongoing conservation actions. The findings may be interesting for managers to see what issues and management strategies other managers in the same or different regions are grappling with. Results will be …

Mojave Applied Ecology Notes Summer 2010, Scott R. Abella, E. Cayenne Engel

Mojave Applied Ecology Notes

Survey of monitoring and management for conservation of rare plants, Roadside restoration techniques in Joshua Tree NP, and an update on renewable energy developments in the Southwestern deserts

Further Developments On The Geothermal System Scoping Model, Mark Antkowiak, Rosemary Sargent, Jesse W. Geiger

Publications (E)

The fields of well construction and engineering, power plant construction and engineering, and reservoir engineering often proceed independently of one another. Yet the subsystems of a geothermal plant with which each of these fields is concerned need to be integrated in order to create a viable geothermal power system and make enhanced (or engineered) geothermal systems (EGS) a technical and an economic reality. Furthermore, each of these subsystems need to be examined in the context of the overall power system to aid with plant construction, and–more salient to the U.S. Department of Energy–to help determine best investment of research dollars. …

Hrc Enews — 2010 Summer, 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.

Perception Of Ecological Risk To Water Environments And How It Affects Water Consumption And Water Resource Management In Southern Nevada, Tanju Kiriscioglu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Climate is harsh in southern Nevada where there is (and has been) a drought alert in effect for over a decade now (Kerr, 2007; Southern Nevada Water Authority, 2009). Las Vegas Valley is a major center of population in the region (1.9 million people), receiving only 4.5 inches of average annual precipitation yet in need of securing more water resources in the near future (SNWA, 2009). Water resource management in southern Nevada is a challenge, especially when 90% of the area’s water needs are met by a single source, the Colorado River, the flow rates of which have been in …

Renewable Energy Projects In Southwestern Deserts – Update On Our Involvement, Scott R. Abella

Public Policy and Leadership Faculty Research

Like many in the conservation field, we have a good understanding of the urgent need for alternative energy sources, but also of the negative environmental tradeoffs of placing renewable energy developments on vast tracts of public lands in southwestern deserts as currently envisioned. We also understand political and economic reasons, good or bad, for not doing some obvious things that make sense for renewable energy like placing solar arrays on building tops in cities, within multi-use contexts such as crops, and on already impacted land when alternative energy projects (right or wrong) are to be placed on public land.

New Front Desk Manual Development Protocols For Millennials Working In The Hotel Industry, Christopher Chennault

UNLV Theses, Dissertations, Professional Papers, and Capstones

Over the past year, the hotel manager of the Westin Versa, Napa, a 179 room franchised hotel located in the city of Napa, California has struggled with conveying to his younger agents (aged 18 to 24) the concept of empowerment. They have had a difficult time with what he defines as "basic common sense" when providing company brand standards to guest recovery situations that go beyond the usual five minutes of a guest interaction. In these scenarios, the young agent is forced to balance the operational needs of the hotel with the wants of the guest and find a middle …

Nevada Interagency Volunteer Program: Helping Hands Across Public Lands – Phase Ii: Annual Progress Report, Period Covering July 1, 2009 - June 30, 2010, Margaret N. Rees

Get Outdoors Nevada

• From July 1, 2009 to June 30, 2010 the Volgistics database has increased the number of records from 6,226 to a total of 6,536 records at the end of this period.
• Website activity this year averaged 109,216 hits per month, with an average of 10,443 pages viewed per month.
• The team attended 14 community outreach events resulting in 2,588 direct contacts and 300 new mailing list records.
• The Interagency Volunteer Program (IVP) completed a total of 67 volunteer events contributing a total of 15,195 volunteer hours.
• A total of 131 volunteers completed orientations and trainings with the IVP.
• A total …

Nevada Interagency Volunteer Program: Helping Hands Across Public Lands – Phase Ii: Quarterly Progress Report, Period Covering April 1, 2010 – June 30, 2010, Margaret N. Rees

Get Outdoors Nevada

• The number of records in the volunteer database increased by 6% over the last quarter. The database now contains 7,250 records.
• A new tracking method was implemented to provide a more comprehensive analysis of website activity. Results show an average of 1397 visits per month, and with an average of 3,400 pages viewed per month.
• Spring volunteer training has been completed.
• Initial planning for Fall events has begun.
• Preparations and initial planning for the 2,010 volunteer recognition banquet began.
• The Interagency Volunteer Standard Operations Manual has been updated and revised.
• Get Outdoors Nevada supported 17 volunteer events in a variety …

Joint Fire Science Program – Lake Mead National Recreation Area Revegetating Burned Arid Lands: Identifying Successful Native Species Using Trait And Competition Analysis: Quarterly Progress Report, Time Period: May 1 — June 30, 2010, Margaret N. Rees

Fire Science

• Article entitled “Competitive Hierarchy of Native Desert Plants with Red Brome (Bromus rubens): Towards Identifying Invasion-Reducing Species" was submitted to the Invasive Plant Science and Management journal.
• Maintained nursery plots and added installment of nitrogen treatment.
• Took measurements in nursery (competition) plots and harvested biomass.