Digital Commons Network^™

Creative Student Engagement, Robyn Raschke

UNLV Best Teaching Practices Expo

Many students do not feel comfortable asking questions in front of the whole class and stay quiet during class.

Add Interactive Elements To Videos Using H5p, Benjamin Root

UNLV Best Teaching Practices Expo

To increase student engagement, video materials can include interactive components.

Voluntary Web-Based Self-Assessment Quiz Use Improves Exam Performance, Especially For Learners With Low Prior Knowledge, Jenifer C. Utz, Matthew L. Bernacki

UNLV Best Teaching Practices Expo

We examined students’ voluntary use of digital self-assessment quizzes as a resource for learning in a large anatomy and physiology lecture course. Students (N = 238) could use 16 chapter quizzes and four analogous unit quizzes to rehearse and self-assess knowledge. Repeated use was uncommon (12%), as was lack of use (13%). Most students (75%) engaged in occasional use of self-assessment quiz items. Exam performance differed between repeated use (84%), occasional use (76%), and no use (72%) groups. Differences were greater among students who lacked prior knowledge of course topics. Quiz use improved performance more for low prior knowledge students, …

Elastic Geothermobarometry: Corrections For The Geometry Of The Host-Inclusion System, M. L. Mazzucchelli, Pamela Burnley, R. J. Angel, S. Morganti, M. C. Domeneghetti, F. Nestola, M. Alvaro

Geoscience Faculty Research

Elastic geothermobarometry on inclusions is a method to determine pressure-temperature conditions of mineral growth independent of chemical equilibrium. Because of the difference in their elastic properties, an inclusion completely entrapped inside a host mineral will develop a residual stress upon exhumation, from which one can back-calculate the entrapment pressure. Current elastic geobarometric models assume that both host and inclusion are elastically isotropic and have an ideal geometry (the inclusion is spherical and isolated at the center of an infinite host). These conditions do not commonly occur in natural rocks, and the consequences for inclusion pressures can only be quantified with …

Environmental Effects On Drosophila Brain Development And Learning, Xia Wang, Amei Amei, J. Steven De Belle, Stephen P. Roberts

Life Sciences Faculty Research

Brain development and behavior are sensitive to a variety of environmental influences including social interactions and physicochemical stressors. Sensory input in situ is a mosaic of both enrichment and stress, yet little is known about how multiple environmental factors interact to affect brain anatomical structures, circuits and cognitive function. In this study, we addressed these issues by testing the individual and combined effects of sub-adult thermal stress, larval density and early-adult living spatial enrichment on brain anatomy and olfactory associative learning in adult Drosophila melanogaster. In response to heat stress, the mushroom bodies (MBs) were the most volumetrically impaired among …

Energy Saving In Data Centers, Wolfgang W. Bein

Computer Science Faculty Research

Globally CO2 emissions attributable to Information Technology are on par with those resulting from aviation. Recent growth in cloud service demand has elevated energy efficiency of data centers to a critical area within green computing. Cloud computing represents a backbone of IT services and recently there has been an increase in high-definition multimedia delivery, which has placed new burdens on energy resources. Hardware innovations together with energy-efficient techniques and algorithms are key to controlling power usage in an ever-expanding IT landscape. This special issue contains a number of contributions that show that data center energy efficiency should be addressed from …

Unlv Innovation: The Research Magazine Of The University Of Nevada, Las Vegas

UNLV Innovation

From health disparities to social injustices, UNLV researchers are tackling some of the toughest challenges our community faces.

Review: So You Want To Be An Academic Library Director, Patsy T. Hawthorne

Library Faculty Research

No abstract provided.

From Bison To Cattle: The Ecology Of The Southern Plains 1500-1750, Jenni Tifft-Ochoa

Calvert Undergraduate Research Awards

Bison made their home on the Southern Plains for millennia. However, their migratory patterns began to shift in the 17^th and 18^th centuries. My research investigated what caused this drastic shift and how it had far reaching effects on the ecology of the Southern Plains. Using archives from two prominent Catholic priests, I began to piece together why the bison left the Southern Plains. Rather than focus on the Europeans as the main players, I instead focused on the Indigenous peoples, the animals, and the land as the centralized actors in this project. I discovered that the introduction …

Dynamically Adjusting The Mining Capacity In Cryptocurrency With Binary Blockchain, Yoohwan Kim, Ju-Yeon Jo

Computer Science Faculty Research

Many cryptocurrencies rely on Blockchain for its operation. Blockchain serves as a public ledger where all the completed transactions can be looked up. To place transactions in the Blockchain, a mining operation must be performed. However, due to a limited mining capacity, the transaction confirmation time is increasing. To mitigate this problem many ideas have been proposed, but they all come with own challenges. We propose a novel parallel mining method that can adjust the mining capacity dynamically depending on the congestion level. It does not require an increase in the block size or a reduction of the block confirmation …

The Nevada Teacher Workforce Report, Danica G. Hays, Matthew Borek, Kim K. Metcalf

College of Education Faculty Research

The purpose of this second edition (2018) of the Teacher Workforce Report (TWR) is to provide a state of the field of teacher workforce in Nevada. To that end, the authors and project staff utilized extant Title II and Nevada System of Higher Education (NSHE) Teacher Education dashboard data as well as school district and charter school vacancy data to develop a portrait of teacher candidate production and the need for teachers in Nevada. Key features of the report:

• The second edition of the TWR is intended to continue the dialogue concerning the Nevada teacher workforce and teacher shortage; …

Bifurcation-Based Stability Analysis Of Electrostatically Actuated Micromirror As A Two Degrees Of Freedom System, Kuntao Ye, Yan Luo, Yingtao Jiang

Electrical & Computer Engineering Faculty Research

Torsional micromirror devices have been widely used in micro displays, RF switches, optical communications, and optical coherence tomography systems. In order to study the stability of electrostatically driven torsional micromirror system with double bottom plates and two voltage sources, a dimensionless, two degrees of freedom (2-DoF) dynamic model was constructed. Governed by the dimensionless phase space model equation, the pull-in and bifurcation phenomena were analyzed using the Hamiltonian method and numerical simulation. In particular, the influence of the damping coefficient and the torsion-bending coupling effect on the phase trajectory was investigated. Furthermore, the conditions that can lead to pull-in were …

Sharing New Knowledge: A Review Of Dissemination Rates And Journal Emphasis In Career And Technical Education, Victor M. Hernandez-Gantes

Journal of Research in Technical Careers

In career and technical education (CTE), the role of academic journals has been critical in the dissemination of information as the field shifted from vocational education to CTE. To keep up with changes in the field, some journals have been renamed to reflect the new emphasis, other journals have retained their historical branding, and new journals have emerged. Thus, the purpose of this descriptive research was to review the typology and dissemination rates of journals currently available in CTE as a means to clarify their role and impact in the field. The review resulted in the identification of 17 journals …

Defining Effective Teaching In Environmental Education: A Georgia 4-H Case Study, Lillian G. Meighan, Nicholas E. Fuhrman

Journal of Research in Technical Careers

Many studies have examined the positive learning outcomes of environmental education (EE), yet few have questioned the means for achieving such outcomes through non-formal teaching methods. Six interviews and four observations were conducted with 4-H environmental educators in Georgia. Study participants defined effective instruction in Georgia 4-H EE as novel and student-centered, where the educator utilizes their own distinct teaching styles, management of the learning environment, and extra resources while capitalizing on teachable moments. Educators worked to create both personal and environmental connections to inspire students to pursue science and environmental careers. EE trainings should prepare educators with either natural …

Unlv Enrollment Analysis, Alexis Acosta, Juan Brena, Chaitanya Ingle, Ajanae' Williams

Math 365 Class Projects

What will be the future enrollment for UNLV between 2021 to 2025? What will be the future enrollment for the College of Engineering between 2021 and 2025?

Safe Drinking Water In The U.S.: A Prediction Of When The Entire U.S. Population Will Have Access To Safe Drinking Water, Blossom Hamika, Haley Merrill, Zoyla Orellana

Math 365 Class Projects

This research is to show when all of the U.S. will have access to safe drinking water.

Linear Algebra Applications In 3d Computer Graphics, Albert A. Antero, Chris Choung, Chris Goff

Math 365 Class Projects

Linear Transformations, Homogenous Coordinates, World Matrix, Project Matrices, Normalized Device Coordinates, View Matrix

Estimating Population Growth Of Las Vegas, Ryan Desacola, Jacob Valadez, Ryan S. Tan

Math 365 Class Projects

An issue we have identified is Las Vegas' population growth. To those that live in Las Vegas, many know that Las Vegas is one of the fastest-growing cities in the United States of America; due to its rampant growth, projecting future population growth is of utmost importance in order to prepare public utilities, housing developments, and other such services for the inevitable incrase. Consequently, for our project, we are attempting to extrapolate upon existing population growth trends (identified by censuses of years past) and utilize the method of least squares to turn out extrapolation into a mathematical prediction.

Forecasting Unlv Gpa Based On Needcd Group, Richie Abenoja, Jean-Paul Castro, Andreana Chua, Jennifer Lee

Math 365 Class Projects

The Center for Academic Enrichment & Outreach at UNLV is a service that provides university students with the resources they need in their college career. The Center has established federally-funded programs that helps low-income individuals, first-generation college students, and individuals with disabilities to progress throughout their academic career. These programs include tutoring, personal counseling, mentoring, financial literacy & guidance, and scholarships. With all this, the Center hopes to create a community in which every individual can fulfill their post-secondary educational objectives.

Unlv Financial Aid Forecasting, Austin-Ryan Abendanio, Cheyenne D'Cruz, Julie Jeon, Michelle Trinchera

Math 365 Class Projects

With an increasing population of students enrolling into UNLV each year, it is important to be able to predict the financial aid funding for future years. We were able to predict how many students would apply for aid and whether or not they would receive any, or enough need-based financial aid, from the years 2019-2023.

Encryption And Decryption Using Matricies, Amit Etiel, James Parsons, Shawn Jenkins-Edwards

Math 365 Class Projects

Mathematician Lester Hill developed the Hill Cipher, the first mathematical encryption method ever developed, in 1929. This method was created in order to strengthen the level of security of previous methods and made it possible to encrypt more than three symbols at a time.

Modeling Programming Language Trends Using Markov Processes, Cody Clymer, Adrian Alberto, Mike Merrill

Math 365 Class Projects

Which Languages Are Worth Investing In? One of the many issues in the computer science industry is knowing which technologies to invest in. Programming languages are a prime example of these technologies, so investors and innovators need to know which programming languages will grow in use over time so that new businesses can grow alongside them.

Rock Paper Scissors And Evolutionary Game Theory, Christian Cordova, Rudolf Jovero, Evan Thomas

Math 365 Class Projects

In Rock Paper Scissors (RPS), three different "species" compete, but no single species has a dominating strategy. In evolutionary game theory, replicator equations model population densities over time. When a mutation is introduced, they are called "replicator-mutator" equations. Using the replicator-mutator equation in [1] we have shown how population density of three species change.

Nevada Desert Dust With Heavy Metals Suppresses Igm Antibody Production, Deborah E. Keil, Brenda J. Buck, Dirk Goossens, Brett Mclaurin, Lacey Murphy, Mallory Leetham-Spencer, Yuanxin Teng, James E. Pollard, Russell Gerads, Jamie C. Dewitt

Geoscience Faculty Research

Systemic health effects from exposure to a complex natural dust containing heavy metals from the Nellis Dunes Recreation Area (NDRA) near Las Vegas, NV, were evaluated. Several toxicological parameters were examined following lung exposure to emissive dust from three geologic sediment types heavily used for recreational off-road activities: yellow sand very rich in arsenic (termed CBN 5); a shallow cover of loose dune sand overlying a gravelly subsoil bordering dune fields (termed CBN 6); and brown claystone and siltstone (termed CBN 7). Adult female B6C3F1 mice were exposed by oropharyngeal administration to these three types of geogenic dusts at 0.01–100 …

Climate Change And Eutrophication: A Short Review, Mohammad Nazari-Sharabian, Sajjad Ahmad, Moses Karakouzian

Civil and Environmental Engineering and Construction Faculty Research

Water resources are vital not only for human beings but essentially all ecosystems. Human health is at risk if clean drinking water becomes contaminated. Water is also essential for agriculture, manufacturing, energy production and other diverse uses. Therefore, a changing climate and its potential effects put more pressure on water resources. Climate change may cause increased water demand as a result of rising temperatures and evaporation while decreasing water availability. On the other hand, extreme events as a result of climate change can increase surface runoff and flooding, deteriorating water quality as well. One effect is water eutrophication, which occurs …

Mathematics Course Placement Using Holistic Measures: Possibilities For Community College Students., Federick Ngo, W. Edward Chi, Elizabeth So Yun Park

Educational Psychology, Leadership, and Higher Education Faculty Research

Background/Context: Most community colleges across the country use a placement test to determine students’ readiness for college-level coursework, yet these tests are admittedly imperfect instruments. Researchers have documented significant problems stemming from overreliance on placement testing, including placement error and misdiagnosis of remediation needs. They have also described significant consequences of misplacement, which can hinder the educational progression and attainment of community college students. Purpose/Objective/Research Question/Focus of Study: We explore possibilities for placing community college students in mathematics courses using a holistic approach that considers measures beyond placement test scores. This includes academic background measures, such as high school GPA …

Eating Disorder Quality Of Life Scale (Edqls) In Ethnically Diverse College Women: An Exploratory Factor Analysis, Liya M. Akoury, Vincent Rozalski, Kimberly A. Barchard, Cortney S. Warren

Psychology Faculty Research

Background: Extant research suggests that disordered eating is common in college women and is associated with decreased quality of life. The Eating Disorder Quality of Life Scale (EDQLS) examines impairment to disordered eating-related quality of life, but has not been validated in college women. Accordingly, the purpose of this study was to examine the reliability, validity, and factor structure of the EDQLS in a diverse sample of 971 college women. Method: Students from a large United States university completed questionnaires examining disordered eating and the EDQLS online. Results: The EDQLS demonstrated excellent internal consistency and good convergent validity with the …

Black Hole Hyperaccretion Inflow-Outflow Model. I. Long And Ultra-Long Gamma-Ray Bursts, Tong Liu, Cui-Ying Song, Bing Zhang, Wei-Min Gu, Alexander Heger

Physics & Astronomy Faculty Research

Long-duration gamma-ray bursts (LGRBs) and ultra-LGRBs (ULGRBs) originate from collapsars, in the center of which a newborn rotating stellar-mass black hole (BH) surrounded by a massive accretion disk may form. In the scenario of the BH hyperaccretion inflow-outflow model and Blandford-Znajek (BZ) mechanism to trigger gamma-ray bursts (GRBs), the real accretion rate to power a BZ jet is far lower than the mass supply rate from the progenitor star. The characteristics of the progenitor stars can be constrained by GRB luminosity observations, and the results exceed usual expectations. LGRBs lasting from several seconds to tens of seconds in the rest …

Fisher’S Exact Approach For Post Hoc Analysis Of A Chi-Squared Test, G Shan, S Gerstenberger

Environmental & Global Health Faculty Research

This research is motivated by one of our survey studies to assess the potential influence of introducing zebra mussels to the Lake Mead National Recreation Area, Nevada. One research question in this study is to investigate the association between the boating activity type and the awareness of zebra mussels. A chi-squared test is often used for testing independence between two factors with nominal levels. When the null hypothesis of independence between two factors is rejected, we are often left wondering where does the significance come from. Cell residuals, including standardized residuals and adjusted residuals, are traditionally used in testing for …

Equifax And The Latest Round Of Identity Theft Roulette, Hal Berghel

Computer Science Faculty Research

The Equifax data breach has exposed nearly half of the US adult population to identity theft, but that's not the real story. © 1970-2012 IEEE.