Digital Commons Network^™

Exploring The Relationship Between Teachers' Beliefs In Mathematics And Their Instructional Practice, Michelle Vander Veldt

UNLV Retrospective Theses & Dissertations

This study explored the relationship between teachers' beliefs about mathematics and their instructional practices. The personal epistemology of the case study elementary mathematics teachers was documented and analyzed to provide evidence of the connection between teachers' beliefs and practice in an elementary school setting; This study was grounded in a theoretical framework of epistemological world views, particularly the comparison of belief across three epistemological world views: (1) the realist, (2) the contextualist, and (3) the relativist. Three areas of beliefs are addressed in this study: (1) beliefs about curriculum, (2) beliefs about pedagogy, and (3) beliefs about assessment. Through analysis …

The Effects Of Perceived Teacher Empowerment On Student Achievement, Florence Barker Aitken

UNLV Retrospective Theses & Dissertations

The purpose of this study was to examine the perceived levels of teacher empowerment in schools showing an increase of student outcomes as well as a decrease of student outcomes on standardized proficiency tests in reading/language arts and mathematics over a three-year period. The relationship between the levels of teachers' perceived empowerment to student achievement was studied as well as specific dimensions of teacher empowerment connected to student outcomes. The instrumentation used in this study was the School Participant Empowerment Scale (SPES) that was developed by researchers Short and Rinehart (1992) and contained six theoretical dimensions of teacher empowerment: (a) …

An Analysis Of Fiscal Allocations In Elementary Schools Meeting And Not Meeting Ayp, William Roy Michael Barton

UNLV Retrospective Theses & Dissertations

This study used a sequential explanatory, mixed-methods design to explore the relationship between fiscal decision making and the school improvement planning process at school sites in a large, southwestern school district and the impact those decisions and decision-making processes may have had on student achievement outcomes in elementary schools; The methodology for the study is comprised of two research phases. Phase I included a quantitative analysis of elementary school expenditure patterns across those categories delineated in the Cooper's and Lybrand's Finance Analysis Model databank for a large urban district in the southwest. Comparisons were made across three sub-groups of elementary …

Social Skills Of Students With Emotional Disabilities: A Technology -Based Intervention, Therese M Cumming

UNLV Retrospective Theses & Dissertations

Students with emotional and behavioral disabilities can be some of the most difficult students to keep in the regular school setting, let alone include in general education classes (Desbians & Royer, 2005). Often, higher percentages of students with emotional disabilities are placed in the most restrictive settings (e.g., homebound, hospitals, and residential settings) than students with any other disability (Nelson, Jordan, & Rodrigues-Walling, 2002). One of the keys to success for these students is consistent and systematic instruction in the areas of behavior and social skills (Williams & Reisberg, 2003); The use of multimedia, student-generated social skills lessons coupled with …

The Principal's Role In Promoting Standards-Based Professional Development, Barbara Jill Presler

UNLV Retrospective Theses & Dissertations

The purpose of this study was to describe principals' and teachers' knowledge of recommended professional development practice as defined by The National Staff Development Council (2001). In addition, the study described teachers' and principals' perceptions of professional development practices in their schools; This study was guided by three research questions: (1) how do principals perceive their own behaviors and activities relative to professional development; (2) how do teachers perceive administrator's behavior and actions relative to professional development; and (3) to what extent did principals base the professional development activities and practices within their schools on the National Staff Development Standards?;This …

Effects Of Test -Taking Strategy Instruction On High -Functioning Adolescents With Autism Spectrum Disorder, Dal Hee Songlee

UNLV Retrospective Theses & Dissertations

Students with autism spectrum disorder (ASD) are expected to take various forms of tests in general education classrooms, therefore test-taking skills are very important and a necessary tool for students with ASD as they strive for academic success. The Test-Taking Strategy (Hughes, Schumaker, Deshler, & Mercer, 2002) has been found to be useful for students with learning disabilities and emotional behavioral disorders (EBD), but not yet with students with ASD; The purpose of this multiple-probe design study was to investigate the effects of test-taking strategy instruction on high-functioning adolescents with ASD. Specifically, the Test-Taking Strategy (Hughes et al.) was taught …

Influencing Factors On Plankton Populations In A Desert Man -Made Lake, Steven Weber

UNLV Retrospective Theses & Dissertations

The purpose of this study was to examine and identify the factors that have influenced changes in phytoplankton and zooplankton assemblages during the initial thirteen years of ecological development of Lake Las Vegas, Clark County, Nevada. Univariate and multivariate statistical methods were used to determine the level of influence lake water chemistry, lake physical characteristics and planktonic groups will have on overall plankton community dynamics. Water quality and plankton population data have been collected since 1991 when the lake began filling through the period of study ending December, 2003; Results indicate the zooplankton biomass was most influenced by conductance, total …

The Development Of Domain-Specific And Domain-General Metacognitive Monitoring, Brett Douglas Campbell

UNLV Retrospective Theses & Dissertations

Metacognitive monitoring may be a critical element in self-regulated learning. Two types of metacognitive monitoring have been identified: domain-specific and domain-general. Domain-specific metacognitive monitoring occurs when an individual is monitoring content-specific knowledge. Domain-general metacognitive monitoring occurs in situations when content-specific knowledge is not available. Currently no research is available that examines the developmental differences between domain-specific and domain-general metacognitive monitoring in children. This study attempted to address this issue by asking children in first, fourth, and seventh grade to make item-by-item confidence judgments while providing answers in two domain-specific tasks and two domain-general tasks. Two working memory spans tasks were …

Assessing The Effect Of Group Model Building On Stakeholder Teams Developing Urban Growth Strategies, Michael Francis Dwyer

UNLV Retrospective Theses & Dissertations

Government in growing cities has a difficult time responding to problems that come with growth. The combination of the complexity of the problem, fragmentation in jurisdictions and responsibilities, and regional consequences produce diverse views of exactly what the problem is, what causes it, and how it is best addressed. The organizational structure of municipal government is not conducive to collaboration. Accordingly, governments have turned increasingly to stakeholder groups to develop growth management strategies. However, these stakeholder groups are not particularly successful. They struggle to achieve consensus even when facilitated and their recommendations often go unimplemented. The question I investigate in …

Field Trip Survey Results, Public Lands Institute

Presentations (PLI Education)

Field Trip Survey Results

Bomb-Pulse Chlorine-36 At The Proposed Yucca Mountain Repository Horizon: An Investigation Of Previous Conflicting Results And Collection Of New Data, James Cizdziel, Amy J. Smiecinski

Publications (YM)

Previous studies by scientists at Los Alamos National Laboratory (LANL) found elevated ratios of chlorine-36 to total chloride (36C1/C1) in samples of rock collected from the Exploratory Studies Facility (ESF) and the Enhanced Characterization of the Repository Block (ECRB) at Yucca Mountain as the tunnels were excavated. The data were interpreted as an indication that fluids containing "bomb-pulse" 36C1 reached the repository horizon in the -50 years since the peak period of above-ground nuclear testing. Moreover, the data support the concept that so-called fast pathways for infiltration not only exist but are active, possibly through a combination of porous media, …

Isothermal Titration Calorimetry And Transmission Electron Microscopy Of Main-Chain Viologen Polymer Containing Bromide As Counerions, Pradip K. Bhowmik, Marcos A. Cheney, Haesook Han, Longzhou Ma

Transmission Electron Microscope

Polyelectrolytes are an important class of macromolecules that contain dissociable ionic groups. When introduced into polar solvent, usually the universal solvent water, dissociation takes place so that electrically charged macromolecule is suspended in solution. The electrostatic interaction is operative between ionized groups inside the macromolecule, between the macromolecules, between the counterions, and between the macromolecule and counterion. Since this interaction is characterized by its long-range nature, the solution exhibits various interesting properties including the polyelectrolyte behavior very different from solutions of neutral polymers.

Interaction Between Metal Fission Products And Triso Coating Materials: A Study Of Chemical Bonding And Interdiffusion: 1st Quarterly Report, 2006, Clemens Heske

Fuels Campaign (TRP)

This project is devoted to an in-depth study of the chemical and electronic impact of metal fission products on the coating layers in TRISO nuclear fuel. In particular, there is a focus on the investigation of Pd, Cs, and Ag and their interface formation with SiC and carbon-based substrates. A variety of surface and near-surface bulk sensitive probes that investigate the occupied and unoccupied electronic states of the substrate and the metal overlayer have been utilized. By a controlled and stepwise deposition of the metal overlayer, it is possible to gain substantial insight into the formation of interfaces and their …

Interaction Between Metal Fission Products And Triso Coating Materials, Clemens Heske

Fuels Campaign (TRP)

In this project the chemical bonding and interface formation of metal fission products with the coating materials used in TRISO fuel particles is investigated. The interface formation of Pd, Cs, and Ag with SiC and pyrolytic carbon is studied in detail. Using the SiC single crystals and TRISO coating materials as substrates, interfaces are prepared under controlled conditions in an ultra-high vacuum environment and are studied with a photoelectron spectroscopy, Auger electron spectroscopy, Inverse Photoemission, X-ray emission spectroscopy, and X-ray absorption spectroscopy. Recent additions to the experimental approach include microscopic techniques (Transmission Electron Microscopy, Scanning Tunneling Microscopy, Atomic Force Microscopy) …

Design Concepts And Process Analysis For Transmuter Fuel Manufacturing, Georg F. Mauer

Fuels Campaign (TRP)

The safe and effective manufacturing of actinide-bearing fuels for any transmutation strategy requires that the entire manufacturing process be contained within a shielded hot cell environment. To ensure that the fabrication process is feasible, the entire process must be designed for remote operation. The equipment must be reliable enough to perform over several decades, and also easy to maintain or repair remotely. The facility must also be designed to facilitate its own decontamination and decommissioning. In addition to these design factors, the potential viability of any fuel fabrication process will also be impacted by a number of variables, such as …

Dissolution, Reactor, And Environmental Behavior Of Zro2-Mgo Inert Fuel Matrix, Kenneth Czerwinski

Fuels Campaign (TRP)

This project examines inert fuels containing ZrO₂ and MgO as the inert matrix, with the relative amount of MgO varied from 30% to 70% in ZrO₂. Reactor physics calculations are used to examine suitable quantities of burnable poisons from the candidate elements Gd, Er, or Hf with reactor grade Pu providing the fissile component, with up to 10% of ²³⁹Pu. Ceramics are synthesized and characterized based on the reactor physics results. The solubility of the fuel ceramics, in reactor conditions, reprocessing conditions, and repository conditions, are investigated in a manner to provide thermodynamic data necessary for …

Impact Of The Synthesis Process On Structure Properties For Afci Fuel Candidates, Thomas Hartmann

Fuels Campaign (TRP)

Advanced Fuel Cycle Initiative research on transmutation fuels includes mono-nitride ceramic fuel forms, and consists of closely coordinated “hot” actinide and “cold” inert and surrogate fuels work. Matrix and surrogate materials work involves three major components: (1) fuel matrix synthesis and fabrication, (2) fuel performance, and (3) fuel materials modeling. The synthesis and fabrication component supports basic material studies, as well as actinide fuel fabrication work through fuel fabrication process development. Fuel performance studies are examining the tolerance of nitride-type fuel to heavy irradiation damage. The fuel materials simulation work involves both atomistic and continuum scale modeling employing first principles, …

Solution-Based Synthesis Of Nitride Fuels, Kenneth Czerwinski, Thomas Hartmann

Fuels Campaign (TRP)

A wide variety of fuel concepts are considered for advanced reactor technology including metals, metal oxides or metal nitrides as solid solutions or composite materials. Nitride fuels have appropriate properties for advanced fuels including high thermal conductivity, thermal stability, solid-state solubility of actinides, fissile metal density, and suitable neutronic properties. A drawback of nitride fuels involves their synthesis. A key parameter for preparing oxide fuels is the precipitation step in the sol-gel process. For nitride fuels, the current synthetic route is carbothermic reduction from the oxide to the nitride. This process step is based on solid phase reactions and for …

Fundamental And Applied Experimental Investigations Of Corrosion Of Steel By Lbe Under Controlled Conditions: Kinetics, Chemistry Morphology, And Surface Preparation, John Farley, Allen L. Johnson, Dale L. Perry

Transmutation Sciences Materials (TRP)

Advanced nuclear processes such as the transmutation of nuclear waste, fast reactors, liquid-metal-cooled reactors, and spallation neutron sources require advanced materials systems to contain them. The required structural materials must be stable in the presence of nonmoderating coolants. A prime candidate for such a coolant is Lead Bismuth Eutectic (LBE). Materials in these systems must be able to tolerate high neutron fluxes, high temperatures, and chemical corrosion. Unfortunately, LBE corrodes stainless steel.

The corrosive behaviors of structural materials in LBE are not well understood. The Russians have over 80 reactor-years experience with LBE coolant in their Alpha-class submarine reactors. The …

Theoretical Modeling Of Protective Oxide Layer Growth In Non-Isothermal Lead Alloy Coolant Systems, Yitung Chen, Jinsuo Zhang, Huajun Chen, Jichun Li

Transmutation Sciences Materials (TRP)

The goal of this research project is to provide a basic understanding of the protective oxide layer behaviors and to develop oxide layer growth models of steels in non-isothermal lead alloys (lead or lead-bismuth eutectic) coolant systems. Precise studies and simulations of all hydrodynamics with thermal conditions encountered in practical coolant loop systems by use of different flowing conditions in the laboratory are difficult and expensive, if not impossible. Therefore it is important and necessary to develop theoretical models to predict the protective oxide layer behaviors at the design stage of a practical lead-alloy coolant system, to properly interpret and …

Finicky Fish Finish... Last! Pre-Visit Lessons -- Support Materials (Grade 5), Discover Mojave: Forever Earth

Curriculum materials (FE)

In “Finicky Fish Finish…Last!” students explore what has happened to the Colorado River and the reasons why it is so difficult for the razorback sucker to thrive in a changed environment. Working as ichthyologists (fish biologists) at Lake Mead, students collect water quality data such as temperature, pH, and clarity -- to determine whether current habitat conditions are sufficient for survival of young razorback suckers. Students observe and identify non-native fish in Lake Mead as they learn how the razorback sucker interacts with these neighbors. Students assess whether Lake Mead is still a good habitat for razorback suckers. Using the …

Colored Overlays And Symbol Identification In Pre-School Children With Disabilities, Edith A Naas

UNLV Retrospective Theses & Dissertations

The purpose of this study was to determine if pre-school children, with and without disabilities, could identify symbols more accurately while looking at the symbols through colored overlays; The LEA Playing Cards and the LEA Near Vision Test were used to assess the ability to point to a symbol. To screen for the preferred color overlay the Cerium Colour Overlays were used; Eighteen children, aged 3 to 5 years participated. Nine were children with disabilities, nine were children without disabilities; A screening determined if each child could match four common symbols by pointing. Three groups were formed. Each group included …

Curricular Development For A Desert Learning Center, Angie Lara, Michael Reiland

Curriculum materials (RRLC)

The Red Rock Desert Learning Center, formerly known as Oliver Ranch, is a 300-acre parcel acquired by the Bureau of Land Management (BLM) in 1993 and incorporated into the Red Rock Canyon National Conservation Area. The Desert Learning Center is being designed to teach participants about the natural world through inquiry-based experiential and interdisciplinary methods in a residential outdoor setting in Red Rock Canyon National Conservation Area, located outside metropolitan Las Vegas, Nevada. The intent is for students, teachers, and researchers to gain an appreciation of desert ecosystems and to begin to apply and connect their knowledge to world ecological …

Feedback Control Design And Stability Analysis Of One Dimensional Evacuation System, S. Wadoo, Pushkin Kachroo

Electrical & Computer Engineering Faculty Research

This paper presents design of nonlinear feedback controllers for two different models representing evacuation dynamics in one dimension. The models presented here are based on the laws of conservation of mass and momentum. The first model is the classical one equation model for a traffic flow based on conservation of mass with a prescribed relationship between density and velocity. The other model is a two equation model in which the velocity is independent of the density. This model is based on conservation of mass and momentum. The equations of motion in both cases are described by nonlinear partial differential equations. …

Efficient Scheduling For Sdmg Cioq Switches, Mei Yang, S. Q. Zheng

Electrical & Computer Engineering Faculty Research

Combined input and output queuing (CIOQ) switches are being considered as high-performance switch architectures due to their ability to achieve 100% throughput and perfectly emulate output queuing (OQ) switch performance with a small speedup factor S. To realize a speedup factor S, a conventional CIOQ switch requires the switching fabric and memories to operate S times faster than the line rate. In this paper, we propose to use a CIOQ switch with space-division multiplexing expansion and grouped input/output ports (SDMG CIOQ switch for short) to realize speedup while only requiring the switching fabric and memories to operate at the line …

Traveling Waves In A Suspension Bridge System, Robert A. Ain

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this thesis, we study the traveling waves in a Lazer-McKenna suspension bridge system which is governed by two coupled nonlinear beam and wave equations. The Lazer-McKenna suspension bridge system describes the vertical deflections in the roadbed and supporting cable of a suspension bridge. Based on some basic analysis on the system, we are able to compute traveling waves numerically by using MAPLE. Multiple large-amplitude traveling waves are obtained. The graphs of various traveling waves are displayed and discussed.

A Study Of Environmental Justice In Relation To Air Pollution And Income, Christian A. Malveaux

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this paper is come to a conclusion on whether or not air pollution and income levels are connected. There is an ongoing pollution problem in Las Vegas. The question that will be attempted to answer in this is paper is: Is there a difference in the amount of air pollution in affluent parts of the Las Vegas Valley and the less affluent parts of the valley? Information and data regarding air pollution is gathered from the Clark County website and other literature. Information on income levels is gathered from journals and literature pertinent to the subject and …

Cooperative Conservation: Increasing Capacity Through Community Partnerships -- Interagency Volunteer Program & Cooperative Conservation Program: Quarterly Progress Report, Period Ending December 31, 2005, Margaret N. Rees

Get Outdoors Nevada

• Database now contains 1,807 records, a 15% increase over the last quarter.
• Website activity increased, recording an average of 38,399 hits per month, with an average of 3,537 pages viewed per month.
• Inaugural interagency volunteer recognition event held October 28, 2005.
• Interagency training program (phase 1) scheduled for February 2006 (four sessions).
• Alternative Workforce Survey completed and delivered to National Park Service.

Take Pride In America In Southern Nevada: Quarterly Progress Report, Period Ending December 31, 2005, Margaret N. Rees

Anti-littering Programs

• Messaging campaign proposal approved by the federal Land Managers.
• Invitations sent to potential Community Steering Committee members.
• Project Manager Doug Joslin appointed to new county-wide Southern Nevada Recycling Advisory Committee.
• Four public service announcements produced by UNLV students.
• Contract with the Nevada Division of Forestry (NDF) in progress for prison crew site clean-ups.
• Plan for agency requests for additional dumpsters and/or roll-offs approved by team.

Afci Quarterly Input – Unlv October 1 Through December 31, 2005, Harry Reid Center For Environmental Studies. Nuclear Science And Technology Division

Transmutation Research Program Reports (TRP)

Quarterly report highlighting research projects, activities and objectives of the Transmutation Research Program at the Nuclear Science & Technology Division, Harry Reid Research Center.

The University of Nevada, Las Vegas supports the AFCI through research and development of technologies for economic and environmentally sound refinement of spent nuclear fuel. The UNLV program has four components: infrastructure, international collaboration, student-based research, and management and program support.