Digital Commons Network^™

The Effect Of Endpoint Knowledge On Dot Enumeration, Alex Michael Moore

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study attempts to extend the principle tenets of the Overlapping Waves Theory (Siegler, 1996), a framework designed to explain the progression of trends in cognitive development, to adult participants’ performance in a dot enumeration task. Literature in the 0-100 number line estimation task (Siegler & Booth, 2004, Ashcraft & Moore, 2011) has revealed a pervasive trend in child estimation such that young children (especially those in kindergarten) respond with a logarithmic line of best fit, while children at the third grade and above overwhelmingly respond with linear estimates to this same range of numbers. A similar developmental trend is …

Improved Algorithms For Ear-Clipping Triangulation, Bartosz Kajak

UNLV Theses, Dissertations, Professional Papers, and Capstones

We consider the problem of improving ear-slicing algorithm for triangulating a simple polygon. We propose two variations of ear-slicing technique for generating “good-quality” triangulation. The first approach is based on searching for the best triangle along the boundary. The second approach considers polygon partitioning on a pre-process before applying the ear-slicing. Experimental investigation reveals that both approaches yield better quality triangulation than the standard ear-slicing method.

The Development And Validation Of A Tool To Measure Self-Confidence And Anxiety In Nursing Students While Making Clinical Decisions, Krista Alaine White

UNLV Theses, Dissertations, Professional Papers, and Capstones

Clinical decision making (CDM) is a cornerstone skill for nurses. Self-confidence and anxiety are two affective influences that impact the learning and adeptness of CDM. Currently, no instruments exist that measure perceived self-confidence and anxiety level of undergraduate nursing students related to CDM. The purpose of this research was to develop, test, and establish psychometric properties for a quantitative instrument that measures the levels of self-confidence and anxiety experienced by undergraduate nursing students while making clinical decisions. The new tool is entitled the Nursing Anxiety and Self-Confidence with Clinical Decision Making (NASC-CDM) scale. The tool is a self-report, Likert-type instrument …

Redefining Security In Sub-Saharan Africa, Winta Sintayehu Gebremariam

UNLV Theses, Dissertations, Professional Papers, and Capstones

New and challenging threats to humans are currently on the rise. These threats to human well being have been neglected and ignored within the traditional conception of security. Security studies have mainly focused on traditional threats, mostly military and political. Although still important, this perspective lacks the ability to address nontraditional threats that are killing and injuring millions each year. Each year, millions die of diseases such as HIV/AIDS, tuberculosis, malaria, hunger, and water related diseases among others. Although these threats are widespread throughout the world, Sub-Saharan Africa bears the brunt of these threats. This thesis proposes an ecological approach …

Time-Dependent Crack Growth Behavior Of Alloy 617 And Alloy 230 At Elevated Temperatures, Shawoon Kumar Roy

UNLV Theses, Dissertations, Professional Papers, and Capstones

Two Ni-base solid-solution-strengthened superalloys: INCONEL 617 and HAYNES 230 were studied to check sustained loading crack growth (SLCG) behavior at elevated temperatures appropriate for Next Generation Nuclear Plant (NGNP) applictaions with constant stress intensity factor (K _max = 27.75 MPa[checkmark]m) in air. The results indicate a time-dependent rate controlling process which can be characterized by a linear elastic fracture mechanics (LEFM) parameter - stress intensity factor (K). At elevated temperatures, the crack growth mechanism was best described using a damage zone concept. Based on results and study, SAGBOE (stress accelerated grain boundary oxidation embrittlement) is considered the primary reason for …

Structural, Electrical And Thermoelectric Properties Of Chromium Silicate Thin Films, Makram Abd El Qader

UNLV Theses, Dissertations, Professional Papers, and Capstones

Thermoelectric devices can generate electrical power as a result of their ability to produce electrical currents in the presence of thermal gradients. They can also produce refrigerative cooling when electrical power is supplied to them. Among the potential semiconducting silicides, CrSi ₂ is attractive because of its high thermal and chemical stability and its potential for thermoelectric application. CrSi₂ /SiO₂ thin-film structures were prepared using RF sputtering. As deposited and annealed (300°C to 600°C) thin films were characterized for their structural, electrical, and thermoelectric transport properties. As-sputtered CrSi ₂ film is amorphous at room temperature and crystallizes around …

Cyber Physical Complex Networks, Modeling, Analysis, And Control, Neveen Shlayan

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research scrutinize various attributes of complex networks; mainly, modeling, sensing, estimation, safety analysis, and control. In this study, formal languages and finite automata are used for modeling incident management processes. Safety properties are checked in order to verify the system. This method introduces a systematic approach to incident management protocols that are governed by mostly unsystematic algorithms. A portion of the used data in this study is collected by means of radar and loop detectors. A weighted t-statistics methodology is developed in order to validate these detectors. The detector data is then used to extract travel time information where …

Development Of A Sustainable Water Resource Financing Mathematical Model For Donors And End-Users, Sahar Zavareh

UNLV Theses, Dissertations, Professional Papers, and Capstones

Rural villages and underdeveloped communities represent the largest group challenged by poor water supply and sanitation with inequalities in resources to adequately implement potential solutions and even more with their high risk level of financing, funding is particularly challenging for water projects. Innovative financing alone will not eliminate the burdens of rural villages and underdeveloped communities. The purpose of this thesis is to address the lack of sustainable water financing of water projects in rural areas using a novel framework of a mathematical model based on "system dynamics" using optimal feedback control theory to maximize the performance of a water …

Technical Assistance For The Revision Of The Conservation Agreement For The Spring Mountains National Recreation Area: Final Closeout Report, Public Lands Institute

Public Lands Institute Publications

Technical Assistance for the revision of the Conservation Agreement for the Spring Mountains National Recreation Area was cooperative agreement between the U.S. Fish and Wildlife Service (USFWS) and the Board of Regents of the Nevada System of Higher Education. The cooperator was the Public Lands Institute (PLI) of the University of Nevada, Las Vegas (UNLV) working directly with staff of the USFWS Southern Nevada Field Office and the U.S. Forest Service’s (USFS) Humboldt-Toiyabe National Forest. The mechanism of cooperation was a Cooperative Ecosystem Studies Unit (CESU) Task Agreement. The purpose of the project was to provide technical assistance to the …

Evaluating And Implementing Web Scale Discovery Services: Part Two, Jason Vaughan, Tamera Hanken

Library Faculty Presentations

Part Four: Quick Tour of the Current Marketplace:

• "The Big 5"
• Similarities and differences

Part Five: It's Not All Sliced Bread:

• Shortcomings of web scale discovery

Part Six: Implementation (pre launch steps):

• Selecting and preparing implementation staff
• Preparing and communicating process/decisions with all staff
• Working with the vendor (roles, expectations, timeline)
• Workflow changes and implications (technical services)

Part Seven: Specific implementation tasks, issues, and considerations:

• Record loading and mapping (catalog content)
• Harvesting and mapping digital/local content
• Working with central index data (internal & external content)
• Web integration and customization
• Assessment and continuous improvement

Evaluating And Implementing Web Scale Discovery Services: Part One, Jason Vaughan, Tamera Hanken

Library Faculty Presentations

Preface: Before Web Scale Discovery

• A very brief overview

Part 1: What is Web Scale Discovery

• Content
• Technology

Part 2: Why is Web Scale Discovery important?

• What’s the need?
• How is it different from earlier attempts at broad discovery?

Part 3: A Framework for Evaluating Web Scale Discovery Services

• What we did at UNLV
• Other options

Walking Box Ranch Planning And Design Quarterly Progress Report: Period Ending July 10, 2010, Margaret N. Rees

Walking Box Ranch

• UNLV participated in several 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
• UNLV met with Sara Moffatt, one of Senator Reid’s staff, to provide an update on project progress. UNLV also requested the Senator’s support in obtaining additional funding for the project for construction, and also for UNLV to bridge the transition from construction through the first two years of operation.
• UNLV held several internal meetings to advance planning for a July VA meeting with BLM to …

Take Pride In America In Southern Nevada: Quarterly Progress Report, Period Covering April 5, 2011-July 4, 2011, Margaret N. Rees

Anti-littering Programs

• Plans were set for a meeting of government, business and nonprofit stakeholders to explore how to enhance statewide collaboration on litter and dumping issues.
• The Hector’s Helpers program with the Clark County School District continued in various schools.
• Planning for the integration of the information sharing portal, volunteer litter monitoring and the GIS database was conducted.
• A total of 12 clean-up events were conducted this quarter.

When Erving Goffman Was A Boy, Sherri Cavan

Bios Sociologicus: The Erving Goffman Archives

Like creating a mosaic, the bits and pieces of Erving Goffman’s life yield a picture of a complex man who lived in troubled times and through his writings changed the way whole generations saw the world. Looking at that life I chose to focus on his boyhood, from childhood through adolescence. My purpose is here descriptive, an ethnography of a childhood recounting events of Goffman’s early life and placing them in their social, historical and cultural context. That done, I will have a few words to say about the themes that I see in this narrative as well as some …

Mojave Applied Ecology Notes Summer 2011, Scott R. Abella, Charles W. Denton, David G. Brewer, Rory W. Steinke, Wayne A. Robbie, W. Wallace Covington, E. Cayenne Engel, Ross Guida

Mojave Applied Ecology Notes

Thoughts on fire possibilities on Mount Charleston, estimating historical densities of Ponderosa pine in northern AZ, over-understory changes in the Spring Mountains, seeding effectiveness in Red Rock Canyon, workshop announcements.

The Green Movement In Hotels: Are College Students On Board?, Amy Walker

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose:

The purpose of this study is to see if environmentally friendly practices are a factor for college students when selecting a hotel. Another purpose of this study is to see if students would be willing to spend more for hotels who offer these environmentally friendly practices.

Nevada Interagency Volunteer Program: Helping Hands Across Public Lands – Phase Ii: Annual Progress Report, Period Covering July 1, 2010 - June 30, 2011, Margaret N. Rees

Get Outdoors Nevada

• From July 1, 2010 to June 30, 2011 the Volgistics database has increased the number of records from 6,536 to a total of 8,460 records at the end of this period.
• Website activity this year averaged 1,110 hits per month, with an average of 2,347 pages viewed per month.
• The team attended 11 community outreach events resulting in 2,455 direct contacts and 393 new mailing list records.
• The Interagency Volunteer Program (IVP) completed a total of 71 volunteer events contributing a total of 17,784 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, 2011-June 30, 2011, Margaret N. Rees

Get Outdoors Nevada

• The number of records in the volunteer database increased by 12.2% over the last quarter. The database now contains 8,460 records.
• The number of site visits decreased by 12.3 % over the last quarter. Results show an average of 1,188 visits per month.
• The number of page views increased 26.4% over last month. Results show an average of 2,632 pages viewed per month.
• The IVP standard operations manual is under final review.
• Get Outdoors Nevada supported twenty-one volunteer events in a variety of ways. These events utilized 1,112 volunteers whom contributed 4,599 combined hours of service.
• Volunteer Orientation Training Automation …

Limnological Assistance For Lake Mead National Recreation Area: Quarterly Report, Period Ending June 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, analysis was completed for 42 juvenile/adult samples and analyses of the remaining samples are underway.
• As of 7/07/11 all sample sets will have been collected for Veliger abundance and settlement at different depths of Lake Mead; sampling continues for Growth of adult quagga mussels within Las Vegas Wash/Las Vegas Bay.
• The Interagency Quagga Mussel Meeting was held on 05/17/11; the next meeting is scheduled for 08/25/11.

Project 2

• Appendix 7, an addition to the Long-term Limnological and Aquatic …

Unlv Stars Fact Sheet, University Of Nevada, Las Vegas

Reports (USI)

University of Nevada, Las Vegas, by earning a 2011 Silver Rating in the Sustainability Tracking, Assessment & Ratings System (STARS), is ahead of the curve among public universities – and improving.

STARS is a voluntary, self–reporting framework developed by the Association for the Advancement of Sustainability in Higher Education (AASHE) to help measure sustainability performance over time and among colleges and universities nationwide. The UNLV Sustainability Council oversaw STARS, which by measuring sustainability can help UNLV to reduce energy consumption and waste, improve education, attract research, and generate jobs.

A rating of Silver puts UNLV in great company – with …

Unlv Stars Unabridged Report, University Of Nevada, Las Vegas

Reports (USI)

University of Nevada, Las Vegas, by earning a 2011 Silver Rating in the Sustainability Tracking, Assessment & Ratings System (STARS), is ahead of the curve among public universities – and improving.

STARS is a voluntary, self–reporting framework developed by the Association for the Advancement of Sustainability in Higher Education (AASHE) to help measure sustainability performance over time and among colleges and universities nationwide. The UNLV Sustainability Council oversaw STARS, which by measuring sustainability can help UNLV to reduce energy consumption and waste, improve education, attract research, and generate jobs.

A rating of Silver puts UNLV in great company – with …

Management And Support Of Shared Integrated Library Systems, Jason Vaughan, Kristen Costello

Library Faculty Research

The University of Nevada, Las Vegas (UNLV) University Libraries has hosted and managed a shared integrated library system (ILS) since 1989. The system and the number of partner libraries sharing the system has grown significantly over the past two decades. Spurred by the level of involvement and support contributed by the host institution, the authors administered a comprehensive survey to current Innovative Interfaces libraries. Research findings are combined with a description of UNLV’s local practices to provide substantial insights into shared funding, support, and management activities associated with shared systems.

Electrochemistry Of Technetium Analogues Rhenium And Molybdenum In Room Temperature Ionic Liquid, Pauline Nancy Serrano

UNLV Theses, Dissertations, Professional Papers, and Capstones

Rhenium was used as an analog for Technetium to study the electrochemical redox properties because the two elements share the same stable oxidation states in aqueous solutions. However, Tc-99 is radioactive and is not readily available for experimentation purposes. Molybdenum is also of interest because when Mo-99 is irradiated, the decay products are Tc-99m and Tc-99. Approximately 30% Tc-99m is eluted from the Mo columns for radiopharmaceutical use with the remaining Mo-99 source decaying to Tc-99 which is discarded as radioactive hospital waste. Currently there are no viable procedures for the reclamation of the radioactive Tc-99 from either fission streams …

Education In The Environment: A Strategy For Continued Interagency Outdoor Education Programming: Quarterly Progress Report: Period Ending May 2011, Margaret N. Rees

Reports (PLI Education)

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

• Two Families in Nature events were held, benefitting approximately 140 people
• The Families in Nature program was honored at the Nevada Recreation & Park Society 2011 Conference (March 16-18). It was chosen both as Program of the Year and Best Program for Children
• More than 500 4th-6th grade students participated in Wilderness Education activities and saw the “Art of Nature” Wilderness presentation
• The Nevada Children’s Outdoor Bill of Rights was promoted through 11 outreach booths and events
• A total of 17 teachers participated in a workshop …

College Of Engineering Senior Design Competition Fall 2011, University Of Nevada, Las Vegas

Fred and Harriet Cox Senior Design Competition Projects

Part of every UNLV engineering student’s academic experience, the senior design project stimulates engineering innovation and entrepreneurship. Each student in their senior year chooses, plans, designs, and prototypes a product in this required element of the curriculum. A capstone to the student’s educational career, the senior design project encourages the student to use everything learned in the engineering program to create a practical, real world solution to an engineering challenge. The senior design competition helps focus the senior students in increasing the quality and potential for commercial application for their design projects. Judges from local industry evaluate the projects on …

College Of Engineering Senior Design Competition Spring 2011, University Of Nevada, Las Vegas

Fred and Harriet Cox Senior Design Competition Projects

Part of every UNLV engineering student’s academic experience, the senior design project stimulates engineering innovation and entrepreneurship. Each student in their senior year chooses, plans, designs, and prototypes a product in this required element of the curriculum. A capstone to the student’s educational career, the senior design project encourages the student to use everything learned in the engineering program to create a practical, real world solution to an engineering challenge.

The senior design competition helps focus the senior students in increasing the quality and potential for commercial application for their design projects. Judges from local industry evaluate the projects on …

Realizing The Promise, Gian Galassi

UNLV Innovation

UNLV’s Science and Engineering Building is open for business – the business of conducting world-class research. Step inside and find out why some are calling it the most important structure built on campus since the university was established more than 50 years ago.

Evaluating Changes And Estimating Seasonal Precipitation For Colorado River Basin Using Stochastic Non-Parametric Disaggregation Technique, Ajay Kalra, Sajjad Ahmad

Civil and Environmental Engineering and Construction Faculty Research

Precipitation estimation is an important and challenging task in hydrology because of high variability and changing climate. This research involves (1) analyzing changes (trend and step) in seasonal precipitation and (2) estimating seasonal precipitation by disaggregating water year precipitation using a k-nearest neighbor (KNN) nonparametric technique for 29 climate divisions encompassing the Colorado River Basin. Water year precipitation data from 1900 to 2008 are subdivided into four seasons (i.e., autumn, winter, spring, and summer). Two statistical tests (Mann-Kendall and Spearman’s rho) are used to evaluate trend changes, and a rank sum test is used to identify the step change in …

1983: The Most Dangerous Year, Andrew R. Garland

UNLV Theses, Dissertations, Professional Papers, and Capstones

A series of otherwise unrelated events culminated to make 1983 the most dangerous year the world has ever known, with the United States and the Soviet Union even closer to war than during the much more well-known events of the 1962 Cuban Missile Crisis. The crisis of 1983 arose from a sequence of accidents, misunderstandings, and mistakes. From highly publicized events such as President Ronald Reagan‘s application of morality to foreign policy to the Soviet Union‘s attempt to discover NATO‘s secret attack plans, an extraordinary confluence of events brought the two superpowers closer to nuclear exchange than is commonly believed. …

“Change” In The 2008 Presidential Campaign: A Study In Rhetorical Definition, Graciela Saez Kleriga

UNLV Theses, Dissertations, Professional Papers, and Capstones

Every election cycle, the major party candidates accept a nomination for the presidency and launch the general campaign. These rhetors not only weave a narrative about themselves as qualified candidates; they also forward an argument about how the public should choose between two candidates. In particular, the 2008 presidential campaign's central question asked Americans about the type of change the nation should undertake. By tracing the definitional arguments utilized at the outset of the general election, this project analyzes how Senator Barack Obama and Senator John McCain utilized this desire for "Change" as a strategic theme.