Digital Commons Network^™

Carbon Isotopic Fractionation Across A Late Cambrian Carbonate Platform: A Regional Response To The Spice Event As Recorded In The Great Basin, Jonathan Lloyd Baker

UNLV Theses, Dissertations, Professional Papers, and Capstones

Geochemical models have suggested that the late Cambrian was characterized by a greenhouse climate with high pCO2. Furthermore, stableisotope analyses within the Great Basin have documented a large carbonate isotope (δ13Ccarb) excursion, known as the Steptoean Positive Carbon Isotope Excursion (SPICE). This event has been documented globally, and is interpreted as having resulted from enhanced organic carbon burial. Unless the size of carbon reservoirs in the Cambrian ocean was significantly different from those of the Cenozoic, this forcing should have resulted in a comparable carbon-isotope excursion in organic matter (δ13Corg). It is also predicted that increased organic carbon burial would …

Self-Stabilizing Leader Election In Dynamic Networks, Hema Piniganti

UNLV Theses, Dissertations, Professional Papers, and Capstones

The leader election problem is one of the fundamental problems in distributed computing. It has applications in almost every domain. In dynamic networks, topology is expected to change frequently. An algorithm A is self-stabilizing if, starting from a completely arbitrary configuration, the network will eventually reach a legitimate configuration.

Note that any self-stabilizing algorithm for the leader election problem is also an algorithm for the dynamic leader election problem, since when the topology of the network changes, we can consider that the algorithm is starting over again from an arbitrary state. There are a number of such algorithms in the …

Energy Efficient Led Displays, John Mani Kumar Jupalli

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this research work, an innovative pixel architecture RGBW, consisting of red (R), green (G), blue (B), and white (W) LEDs, is designed and implemented for color generation. Energy consumption of new pixel architecture consisting of RGBW LEDs is compared to standard architecture consisting of RGB LEDs. Human perception experiments are conducted to study the differences in perception between the two architectures when the same colors are generated using RGBW vs. RGB. Measurements of power for a 32inch x 16inch LED display has proved up to 18% power savings for low saturated colors, up to 8% for high saturated colors …

A Mathematical Approach For Optimizing The Casino Slot Floor: A Linear Programming Application, Kasra Christopher Ghaharian

UNLV Theses, Dissertations, Professional Papers, and Capstones

Linear programming is a tool that has been successfully applied to various problems across many different industries and businesses. However, it appears that casino operators may have overlooked this useful and proven method. At most casino properties the bulk of gaming revenues are derived from slot machines. It is therefore imperative for casino operators to effectively manage and cultivate the performance of this department. A primary task for the casino operator is planning and deciding the mix of slot machines in order to maximize performance.

This paper presents the task of optimizing the casino slot floor as a linear programming …

Efficiency Of Fiscal Allocations In Site-Based Empowered Schools, Jerome Jay Meyer

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study implemented a two phase concurrent mixed-methods design to generate a greater understanding of how elementary schools with increased autonomy in fiscal decision making allocated their money, how their site-based decisions affected allocative efficiency, and how increased autonomy affected site-based decision making when compared with a set of matched control schools within a large urban district.

Phase I compared school site expenditure patterns of site-based empowered schools to demographically matched control schools and to all elementary schools within a large urban district over four years, 2004-05, 2005-06, 2006-07, and 2007-08. Expenditure data were collected from the In$ite data base …

Effects Of Comprehensive Education On Elementary School Student Performance On Standardized Exams, Kenneth Vaughn Higbee

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose if this study was to compare math and reading Criterion Reference Test (CRT) scores of 3rd and 5th grade students using two distinct educational models: a comprehensive educational curriculum (CEC) model and a No Child Left Behind (NCLB) curricular model. While the CEC curricular model focuses on a combination of core and non-core curriculum, the NCLB curricular model focused on a combination of intense core remediation and the reduction of some non-core curriculum. Students were from two demographically similar frontier Nevada elementary schools. Test scores were compared in 2004 when both schools used identical curricular approaches, and then …

Improving Ensemble Streamflow Prediction Using Interdecadal/Interannual Climate Variability, Kenneth W. Lamb

UNLV Theses, Dissertations, Professional Papers, and Capstones

The National Weather Service’s (NWS) river forecast centers provide long-term water resource forecasts for the main river basins in the U.S. The NWS creates seasonal streamflow forecasts using an ensemble prediction model called the Extended Streamflow Prediction (ESP) software. ESP creates runoff volume forecasts by taking the current observed soil moisture and snowpack conditions in the basin and applying them to historical temperature and precipitation scenarios. The ESP treats every historic input year as a likely scenario of future basin conditions. Therefore improving the knowledge about how long-term climate cycles impact streamflow can extend the forecast lead time and improve …

A Study On Eco-Friendly Merchandise In A Resort Retail Environment, Lindsey C. Patrick

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to determine consumer purchasing habits of ecofriendly apparel in a retail resort environment. In order to find the rationale behind purchasing decisions, this study measured sales and survey responses based on the choice of two tee shirt options, eco-friendly tee shirts and regular cotton tee shirts. The survey was given to all customers purchasing these tee shirts in order to determine specific demographic information as well as their personal opinions on eco-friendliness, and willingness to pay a premium for eco-friendly products. Due to a lack of previous research in this field, this study is …

Age And Petrogenesis Of The Roaring Mountain Rhyolites, Yellowstone Volcanic Field, Wyoming, Kathleen Marie Wooton

UNLV Theses, Dissertations, Professional Papers, and Capstones

Extracaldera rhyolites in the Norris-Mammoth Corridor of the Yellowstone Volcanic Field (YVF) appear to be unrelated to intracaldera volcanism, resulting instead from a new crustal magma source derived from northeastward propagation of the Yellowstone “melting anomaly.” The youngest extracaldera rhyolite unit, the Roaring Mountain Member (RM), is chemically distinct from the previous extracaldera lavas, reverting to more primitive compositions.

This study suggests that the majority of the RM rhyolites erupted from the same large-scale silicic magma system. Based on geochemistry and 40Ar/39Ar geochronology, the Crystal Spring mingled rhyolite and Obsidian Cliff rhyolite erupted concurrently at 59.1 ± 2.0 ka. The …

Discrete Diffusion Models To Study The Effects Of Mg2+ Concentration On The Phopq Signal Transduction System, Preetam Ghosh, Samik Ghosh, Kalyan Basu, Sajal K. Das, Chaoyang Zhang

Faculty Publications

Background: The challenge today is to develop a modeling and simulation paradigm that integrates structural, molecular and genetic data for a quantitative understanding of physiology and behavior of biological processes at multiple scales. This modeling method requires techniques that maintain a reasonable accuracy of the biological process and also reduces the computational overhead. This objective motivates the use of new methods that can transform the problem from energy and affinity based modeling to information theory based modeling. To achieve this, we transform all dynamics within the cell into a random event time, which is specified through an information domain …

F5c: A Variant Of Faugere's F5 Algorithm With Reduced Gröbner Bases, Christian Eder, John E. Perry

Faculty Publications

The F5 algorithm for computing Gröbner bases achieves a high level of efficiency through the careful analysis of signatures assigned to each computed polynomial. However, it computes and uses many polynomials that turn out to be redundant. Eliminating these redundant polynomials is a non-trivial task, because they correspond to signatures required for reduction. This paper revisits the theory underlying F5 and describes F5C, a new variant that prunes redundant polynomials, then re-computes signatures to preserve correctness. This strategy successfully reduces both overhead and execution time. (C) 2010 Elsevier Ltd. All rights reserved.

Degradation Specific Ocr, Subramaniam Venkatraman

Boise State University Theses and Dissertations

Optical Character Recognition (OCR) is the mechanical or electronic translation of scanned images of handwritten, typewritten, or printed text into machine-encoded text. OCR has many applications, such as enabling a text document in a physical form to be editable, or enabling computer searching on a computer of a text that was initially in printed form. OCR engines are widely used to digitize text documents so that they can be digitally stored for remote access, mainly for websites. This facilitates the availability of these invaluable resources instantly, no matter the geographical location of the end user. Huge OCR misclassification errors can …

Confidence Intervals And Tests On The Difference Of Means Of Two Delta Distributions, Karen Grace Villarente Rosales

Dissertations

Various research fields produce data that are lognormally distributed and inflated with zero values. This type of data follows a delta distribution. In this study, we want to extensively investigate different interval and hypothesis testing methods for comparing the means of two delta populations to see which methods are optimal under different conditions of the populations.

For confidence intervals, existing MVUE methods are extended to two sample cases and compared to classical and two proposed robust methods. We investigated the performance of the classical Student's t, Welch t, and Wilcoxon-based interval to see if these methods really perform badly on …

The K-Cores Of A Graph, Allan Bickle

Dissertations

Full abstract attached as supplemental file.

An Application Of Vygotsky’S Social Learning Theory On Calculator Self-Efficacy And Calculator Achievement By Gender, Debbie M. Kohler

Dissertations, Theses and Capstone Projects (Full IR Collection)

The purpose of this study is to determine what relationships or differences exist between males and females in calculator self-efficacy and calculator achievement, and if social learning groups better support females in calculator achievement and efficacy. To accomplish this purpose, this quasi-experimental study examined pre-test and post-tests using a teacher developed Calculator Self-Efficacy Instrument and a Calculator Achievement Test. The study involved three treatment classes that were arranged into social learning groups according to Vygotsky’s social learning theory and one control class that was arranged in traditional rows. Four major findings emerged. Males scored significantly higher than females on the …

The Needs Of Young Daughters Being Raised By Single Parent Fathers, Nicoma Wood

Dissertations, Theses and Capstone Projects (Full IR Collection)

The purpose of this study is to analyze the needs of young daughters being raised by single parent fathers in order to create a program that will assist in addressing these needs. Daddy’s Girl, a program to be founded by the Nicoma Narjett Foundation will be created to provide inspiration, support, character education, and social development to young girls, between the ages of 10 to 16, who are currently being raised in single parent homes, where the father is the primary care taker. The researcher believes that by creating this program under the nonprofit organization, she will be assisting young …

Inequities In Education: The Case Of Fulton County School District, Lyndsay M. Moses

Dissertations, Theses and Capstone Projects (Full IR Collection)

On June 30, 2007, after much dissension the United States Supreme Court came to a final decision that public schools are not allowed to use a student’s race or ethnicity as the primary factor in assigning students to particular schools. This ruling comes at a time when there are high levels of residential segregation that are producing resegregated schools. Residential segregation is not only creating racial resegregation, but also a consolidation of poverty. Forty-three percent of African American and Hispanic students attend schools with poverty rates over 80 percent, compared to just 4 percent of Caucasian students (McArdle, Osypuk, and …

Self-Stabilizing Group Membership Protocol, Mahesh Subedi

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this thesis, we consider the problem of partitioning a network into groups of bounded diameter.

Given a network of processes X and a constant D, the group partition problem is the problem of finding a D-partition of X, that is, a partition of X into disjoint connected subgraphs, which we call groups, each of diameter no greater than D. The minimal group partition problem is to find a D-partition {G1, ... Gm} of X such that no two groups can be combined; that is, for any Gi and Gj, where i ≠ j, either Gi U Gj is disconnected …

“You Can Pick Really Good Literature That Will Lead Them There”: Investigating The Instructional Roles Teachers Utilize When Conducting Literature Discussions, Sophie M. Ladd

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this multi-case study was to investigate the instructional roles teachers utilize in whole group and small group discussion. This study highlights the questioning and response strategies two elementary teachers used during read alouds and literature discussions. Data sources included whole group and small group discussions, interviews, teachers' reflection journals, classroom observations, researcher field notes, and Informal correspondence. Data were analyzed using Merriam's (1998) analytic framework for case study. A within-case analysis was conducted for each case, followed by a cross-case analysis. Through with-in case analysis questioning and response categories were developed. These categories included: appealing, prompting, examination, …

Development Of Software To Estimate Pressures On The Residual Limbs Of Amputees By Means Of A Pylon Mounted Transducer, Malli K. Yalamanchili

UNLV Theses, Dissertations, Professional Papers, and Capstones

The alignment of prosthesis has been recognized as one of the main factors that determine successful prosthetic outcomes for trans-tibial amputees. Alignment is defined as the relative position and orientation of the prosthetic components. Misalignment can result in changes in the position and orientation of the joints of the leg and moments experienced by them during gait, increases in energy use, and discomfort or even tissue breakdown at the socket/stump interface. Hence it is very important to align the prosthesis in correct manner. Gait analysis can be used to examine the effects of incorrect alignment of the prosthesis during gait. …

Characterization Of Unsaturated Flow In Dual-Porosity Granular Media, Jeevan A. Jayakodilage

UNLV Theses, Dissertations, Professional Papers, and Capstones

A geological medium made up of uncemented coarse porous rock fragments may be described as a “dual-porosity granular medium” due to the presence of two types of pores; small pores within individual fragments and large pores between the fragments. Crushed stone found in heap leach piles, mine waste, backfills, rock drains, and engineered capillary barrier systems fit this description. Unsaturated flow in a dualporosity granular medium will occur both through the fragments (matrix flow), and on the fragment surfaces (film flow). The relative influence of gravity and capillary forces on these two flow regimes will be largely different. Therefore, unsaturated …

Late Paleozoic Deformation In The Osgood Mountains And Dry Hills, Northern Nevada, Samuel A. Siebenaler

UNLV Theses, Dissertations, Professional Papers, and Capstones

Pennsylvanian (IP) and Permian (P) deposits (Etchart Formation) and structures in the northern Osgood Mountains and Dry Hills are identified and interpreted to reconstruct a late Paleozoic tectonic history for the time between the Antler and Sonoma orogenies. Mapping, field observations, fusulinid-based unit ages, and structural analysis are used to identify three fold and fault sets, a fault set, a fold set, and at least two angular unconformities. The faults consist of N to S striking normal faults (fault set 1) that are cross cut by WSW-ENE striking thrust faults (fault set 2). Fault sets 1 and 2 are cross …

Speciation And Spectroscopy Of The Uranyl And Tetravalent Plutonium Nitrate Systems: Fundamental Studies And Applications To Used Fuel Reprocessing, Nicholas A. Smith

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation explores the use of UV-Visible spectroscopy and Time Resolved Laser Induced Fluorescence spectroscopy as near real time process monitors of uranium and plutonium concentrations in aqueous reprocessing trains. The molar absorptivities and linear ranges of these metals were investigated under total nitrate and acid concentrations similar to those found in current reprocessing systems. Concurrent to this, a new multiple wavelength monitor was derived that is capable of determining the total nitrate concentration spectroscopically. This method uses the uranium absorbance spectrum to calculate the nitrate concentration in solution. When used as part of an Advanced Safeguard suite, this technique …

Effect Of Spatial And Temporal Variability Of Antecedent Moisture Content On Model-Generated Runoff From An Arid Watershed, William J. Meyer

UNLV Theses, Dissertations, Professional Papers, and Capstones

Streams in the arid southwest are typically ephemeral, and stream gages are not commonly available. Consequently, runoff data from storm events is not available, and flood control facility design or other water resource related decisions are based on synthetic hydrographs. In the Mojave Desert region of Southern Nevada, the duration of storm used to develop these synthetic hydrographs is the 6 hour storm. The 6 hour storm is used to simulate high intensity summer storms. Additionally, soils information used in the calculations for these synthetic hydrographs is taken from maps that are generally developed for a broad range of issues …

Education Of Mathematically Talented Students In Hungary, Julianna Connelly Stockton

Mathematics Faculty Publications

Hungary is famous for its production of large numbers of highly talented mathematicians and physicists. This study explores the Hungarian system for educating mathematically talented secondary school students with the goal of identifying successful features that may be applicable to education in the United States. Highlights of the Hungarian approach include an emphasis on problem solving, problem posing, detailed explanation or proof for solutions, and development of mathematical creativity through the search for multiple solution paths.

Kinematics And Vorticity In Kangmar Dome, Southern Tibet: Testing Midcrustal Channel-Flow Models For The Himalaya, Tom Wagner, Jeffrey Lee, Bradley R. Hacker, Gareth Seward

All Faculty Scholarship for the College of the Sciences

Kinematic, kinematic vorticity (W_m), and deformation temperature analyses were completed to test the hypothesis that midcrustal rocks exposed in the core of the Kangmar gneiss dome, southern Tibet record ductile deformation patterns of a “frozen” segment of a southward flowing midcrustal channel. Microscopic and mesoscopic kinematic indicators exhibit a downward transition from a subequal mix of top-north and top-south shear in garnet zone rocks to dominantly top-north shear in staurolite/kyanite zone and deeper rocks. Kinematic vorticity values indicate an increase in pure shear component with depth from ∼48% pure shear in chloritoid zone rocks through ∼62% in …

Reformed Worship (Rw) 98 - Lent / Easter (December 2010), Reformed Worship Editors

Reformed Worship Magazine

Features

Walking with Jesus through Holy Week by Tom Vos....3

Good Friday News by David Gambrell....4

Lead Me to the Rock by Sonya Vanderveen Feddema....6

To the Cross by Leon H. Johnston....15

Stations of the Cross by Julie Janisch....16

A Creative Communion by Eric Nykamp....18

Let the Trumpet Sound! by Peter Kuipers....29

An Arts Festival for Holy Week by A. Merril Smoak, Jr....32

The Suffering Servant by Tim Schuurman....34

Singing the Shepherd Psalm by Carl P. Daw, Jr.....38

Identifying with Christ by Stacey Gleddiesmith....42

Departments

Editorial: What Language Shall …

Layer Moduli Of Nebraska Pavements For The New Mechanistic Empirical Pavement Design Guide, Soohyok Im, Yong-Rak Kim, Hoki Ban

Nebraska Department of Transportation: Research Reports

No abstract provided.

Virtual Proofing In The Packaging Industry, Kaitlin Rockway, Andrew Mceachron

Graphic Communication

The purpose of this study is to measure the variation of opacity when overprinting spot colors on film during a typical flexographic press run and to determine how that variability affects the reliability of virtual proofing. This study addresses the packaging industry’s current attitude toward virtual proofing and how the adoption of virtual proofing will affect a package printer. It also explains how virtual proofing works and the equipment and processes needed to implement a virtual proofing workflow.

This study explains the process of printing the test targets that were provided by Integrated Color Solutions and the data collected from …

The Influence Of Nanoporous Crystalline Structure On Low Molecular Weight Mass Transport In Syndiotactic Polystyrene, Justin Paul Brandt

Dissertations

Solid-state structure, crystalline morphology, crystallization kinetics, thermal, free volume, and gas transport properties of semicrystalline syndiotactic polystyrene (sPS) and ethylene vinyl alcohol copolymers (EVOH) have been investigated. Solid-state structure of sPS after crystallization from the melt and glassy state was examined by differential scanning calorimetry (DSC), density and wide angle x-ray diffraction analysis (WAXD). The measurements confirmed low density of syndiotactic polystyrene crystalline forms, which in the case of α and δe was smaller and in the case of β and γ crystalline forms was slightly larger than the density of the glassy amorphous sPS. Positron annihilation lifetime spectroscopy (PALS) …