Digital Commons Network^™

A Numerical Study Of High Temperature And High Velocity Gaseous Hydrogen Flow In A Cooling Channel Of A Ntr Core, Sajan B. Singh

LSU New Orleans Theses and Dissertations

Two mathematical models (a one and a three-dimensional) were adopted to study, numerically, the thermal hydrodynamic behavior of flow inside a single cooling channel of a Nuclear Thermal Rocket (NTR) engine. The first model assumes the flow in the cooling channel to be one-dimensional, unsteady, compressible, turbulent, and subsonic. The working fluid (GH₂) is assumed to be compressible. The governing equations of the 1-D model are discretized using a second order accurate finite difference scheme. Also, a commercial CFD code is used to study the same problem. Numerical experiments, using both codes, simulated the flow and heat transfer …

4d Evolution Of Fluvial System And Channel-Fill Architecture Of The Cretaceous Blackhawk Formation, Wasatch Plateau, Utah: An Integrated Fluvial Rock Record Analysis, Hiranya Sahoo

LSU New Orleans Theses and Dissertations

Using an integrated dataset comprising outcrop, core, GPR and LiDAR data, this study targets a high-quality outcrop "window" of the upper Cretaceous Blackhawk Formation in the eastern Wasatch Plateau in central Utah, spanning a fairly large spatial (~30 km² area comprising eight contiguous, and vertical cliff faces) and temporal (~4 my) range. This research provides field-validation and -calibration of a wider range of fluvial heterogeneity: 1) large-scale heterogeneity (10’s of m vertically and 100’s of m laterally), 2) intermediate-scale heterogeneity (1’s of m vertically and 10’s of m laterally), and 3) small-scale heterogeneity (10’s of cm vertically and 1’s …

Analysis Of Windows 8 Registry Artifacts, Jeremy M. Stormo

LSU New Orleans Theses and Dissertations

Microsoft’s series of Windows operating systems represents some of the most commonly encountered technologies in the field of digital forensics. It is then fair to say that Microsoft’s design decisions greatly affect forensic efforts. Because of this, it is exceptionally important for the forensics community to keep abreast of new developments in the Windows product line. With each new release, the Windows operating system may present investigators with significant new artifacts to explore. Described by some as the heart of the Windows operating system, the Windows registry has been proven to contain many of these forensically interesting artifacts. Given the …

A Generalization Of The Partition Problem In Statistics, Jie Zhou

LSU New Orleans Theses and Dissertations

In this dissertation, the problem of partitioning a set of treatments with respect to a control treatment is considered. Starting in 1950's a number of researchers have worked on this problem and have proposed alternative solutions. In Tong (1979), the authors proposed a formulation to solve this problem and hundreds of researchers and practitioners have used that formulation for the partition problem. However, Tong's formulation is somewhat rigid and misleading for the practitioners, if the distance between the ``good'' and the ``bad'' populations is large. In this case, the indifference zone gets quite large and the undesirable feature of the …

Buckling, Postbuckling And Imperfection Sensitivity Analysis Of Different Type Of Cylindrical Shells By Hui's Postbuckling Method, Hailan Xu

LSU New Orleans Theses and Dissertations

Hui and Chen (1986) were the first to show that the well-known Koiter’s General Theory of Elastic Stability of 1945 can be significantly improved by evaluating the postbuckling b coefficient at the actual applied load, rather than at the classical buckling load. Such improvement method was demonstrated to be (1) very simple to apply with no tedious algebra, (2) significant reduction in imperfection sensitivity and (3) although it is still asymptotically valid, there exists a significant extension of the range of validity involving larger imperfection amplitudes. Strictly speaking, Koiter’s theory of 1945 is valid only for vanishingly small imperfection amplitudes. …

Long Term Observations Of B2 1215+30 With Veritas, E. Aliu, S. Archambault, T. Arlen, T. Aune, M. Beilicke, W. Benbow, R. Bird, A. Bouvier, J. H. Buckley, V. Bugaev, A. Cesarini, L. Ciupik, M. P. Connolly, W. Cui, J. Dumm, M. Errando, A. Falcone, S. Federici, Q. Feng, J. P. Finley, P. Fortin, L. Fortson, A. Furniss, N. Galante, L. Gerard, G. H. Gillanders, S. Griffin, J. Grube, G. Gyuk, D. Hanna, J. Holder, G. Hughes, T. B. Humensky, P. Kaaret, M. Kertzman, Y. Khassen, D. Kieda, H. Krawczynski, F. Krennrich, M. J. Lang, A. S. Madhavan, G. Maier, P. Majumdar, S. Mcarthur, A. Mccann, P. Moriarty, R. Mukherjee, D. Nieto, A. O’Faolain De Bhroithe, P. T. Reynolds, Et Al

Physical Sciences Publications

We report on VERITAS observations of the BL Lac object B2 1215+30 between 2008 and 2012. During this period, the source was detected at very high energies (VHEs; E > 100 GeV) by VERITAS with a significance of 8.9σ and showed clear variability on timescales larger than months. In 2011, the source was found to be in a relatively bright state and a power-law fit to the differential photon spectrum yields a spectral index of 3.6 ± 0.4stat ± 0.3syst with an integral flux above 200 GeV of (8.0 ± 0.9stat ± 3.2syst) × 10−12 cm−2 s−1. No short term variability …

Effects Of A Cross-Age Peer Tutoring Program On Reading Performance Of Hispanic Title I Second And Third Grade Students, Ana Isabel Rodriguez

Theses and Dissertations

Hispanic students are falling behind their peers in reading fluency and are struggling to close the gap. This study examined the reading fluency influence on 73 Hispanic second and third grade students while receiving reading fluency support from middle school Hispanic tutors. These students were compared to Hispanic second and third grade students not receiving tutoring reading support. All students were assessed before the tutors gave reading support, mid-year and after the reading support finished using a school district fluency measurement. Findings found that students made rapid growth in reading fluency from the beginning of the tutoring support to mid-year. …

Categorization Of Large Corpora Of Malicious Software, Deekshit Kura

LSU New Orleans Theses and Dissertations

Malware is computer software written by someone with mischievous or, more usually, malicious and/or criminal intent and specifically designed to damage data, hosts or networks. The variety of malware is increasing proportionally with the increase in computers and we are not aware of newly emerging malware. Tools are needed to categorize families of malware, so that analysts can compare new malware samples to ones that have been previously analyzed and determine steps to detect and prevent malware infections.

In this thesis, I developed a technique to catalog and characterize the behavior of malware, so that malware families, the level of …

An Examination Of The Perceptions Of Educational Leaders On The Ensuring Literacy For All Initiative’S Impact On Student Reading Achievement In Louisiana, Khanh Kim Nguyen-Dufour

LSU New Orleans Theses and Dissertations

The purpose of this qualitative phenomenological study was to examine the experiences of Louisiana’s Ensuring Literacy For All (ELFA) initiative from the perspective of

educational administrators in order to identify: (a) the factors within ELFA that contributed to student reading performance; (b) the effects of the perceptions of ELFA administrators on student achievement; and (c) the components of effective leadership that attributed to the success of ELFA implementation. Bandura‘s (1993) socio-psychological theory of self efficacy was used to frame this study, which included six ELFA administrators from the state, district, and school level. The five findings of this study revealed …

Wave Transformation At A Saltmarsh Edge And Resulting Marsh Edge Erosion: Observations And Modeling, Kevin J. Trosclair

LSU New Orleans Theses and Dissertations

This study examines wind generated waves during winter storms, their transformation/attenuation near the marsh edge, and the resulting saltmarsh edge erosion. A simple numerical model for wave generation, transmission and marsh edge erosion was developed and validated against observations from Lake Borgne, Louisiana. Results suggest that meteorological conditions modify the local water depth via wind or wave setup and atmospheric pressure, thus exerting a first order control on the location of wave attack, which in turn determines the type of wave forces (shear vs. impact) that dominate the erosion process. Scarp failure follows, at a location determined by water level, …

Semantic Services For Enterprise Data Exchange, James A. Sauvinet

LSU New Orleans Theses and Dissertations

Data exchange between different information systems is a complex issue. Each system, designed for a specific purpose, is defined using a vocabulary of the specific business. While Web services allow interoperations and data communications between multiple systems, the clients of the services must understand the vocabulary of the targeting data resources to select services or to construct queries. In this thesis we explore an ontology-based approach to facilitate clients’ queries in the vocabulary of the clients’ own domain, and to automate the query processing. A governmental inter-department data query process has been used to illustrate the capability of the semantic …

Techniques For The Visualization Of Positional Geospatial Uncertainty, Brent A. Barré

LSU New Orleans Theses and Dissertations

Geospatial data almost always contains some amount of uncertainty due to inaccuracies in its acquisition and transformation. While the data is commonly visualized (e.g. on digital maps), there are unanswered needs for visualizing uncertainty along with it. Most research on effectively doing this addresses uncertainty in data values at geospatial positions, e.g. water depth, human population, or land-cover classification. Uncertainty in the data’s geospatial positions themselves (positional uncertainty) has not been previously focused on in this regard. In this thesis, techniques were created for visualizing positional uncertainty using World Vector Shoreline as an example dataset. The techniques consist of a …

High Resolution X-Ray Diffraction Analysis Of Cb1 Receptor Antagonists As A Means To Explore Binding Affinity, Steven P. Fournet

LSU New Orleans Theses and Dissertations

Abstract

Charge density studies have been conducted on ten CB₁ cannabinoid receptor antagonists via high resolution x-ray crystallography. Bond critical point values and various other properties derived from these studies including the electrostatic potential were analyzed in correlation to the affinity of each compound with the CB₁ receptor. Correlation/anti-correlation was found between several properties and K_i. The data was also interpreted by principal component analysis with three principal components accounting for 85% of the data variation. Data mining was limit due to the low sample count and the requirements set for the inclusion of correlated/anti-correlated variables …

Curated Reasoning By Formal Modeling Of Provenance, Kevin B. Shaw

LSU New Orleans Theses and Dissertations

The core problem addressed in this research is the current lack of an ability to repurpose and curate scientific data among interdisciplinary scientists within a research enterprise environment. Explosive growth in sensor technology as well as the cost of collecting ocean data and airborne measurements has allowed for exponential increases in scientific data collection as well as substantial enterprise resources required for data collection. There is currently no framework for efficiently curating this scientific data for repurposing or intergenerational use.

There are several reasons why this problem has eluded solution to date to include the competitive requirements for funding and …

Promoting Electrocatalytic Activity Of A Composite Sofc Cathode La0.8Sr0.2Mno3+Δ/Ce0.8Gd0.2O2-Δ With Molten Carbonates, Yunhui Gong, Xue Li, Lingling Zhang, Whitney Tharp, Changyong Qin, Kevin Huang

Faculty Publications

The effect of molten carbonates (MCs) on polarization resistance (R_P), a direct measure of oxygen reduction reaction (ORR) activity, of a composite La_0.8Sr_0.2MnO_3+δ/Ce_0.8Gd_0.2O_2-δ (LSM/GDC) solid oxide fuel cell (SOFC) cathode has been systematically investigated in this study over a temperature range of 550–650°C and partial pressure of oxygen (pO₂) span of 10⁻³ ∼ 1 atm. It is shown that the LSM/GDC cathode, either in the pristine or MC-modified states, can be generally modeled by two consecutive parallel circuits consisting of a resistance and a …

Using The Depth Of Knowledge Model To Create High School Mathematics Assessments--Research, Lynne Gannon Patterson, Meagan Musselman, Joel Rowlett

Journal of Excellence in College Teaching and Learning

This study examined the midterm exams of six high school math teachers and sought to (a) determine if teachers could accurately identify which level of Norman Webb’s Depth of Knowledge (DOK) model their test items aligned to, and (b) compare the actual percentage of test items at each DOK level to the targeted percentage based off Webb’s research. The study revealed that teachers were not accurate with their alignment of test items with Webb’s DOK model. They also came up short in comparison to the targeted percentages of test items at each level. Comprehensively, they were asking more questions at …

Collaborating To Meet Challenges Of Co - Teaching Common Core Standards--Research, Dottie Willis

Journal of Excellence in College Teaching and Learning

Kentucky has led the nation in adopting Common Core Standards to revitalize education for next-generation learners and schools. To improve preparation of the state’s next-generation teachers, Kentucky has also mandated reform in training student teachers. This article reviews experiences of teacher educators from four Kentucky universities that are collaborating to ensure both quality and consistency in Co-Teaching Training, a new state requirement for all P-12 cooperating teachers and university supervisors who mentor student teachers. The author reports cooperating teachers’ responses to their initial Co-Teaching Training; analyzes educators’ perceptions about a complementary relationship between Co-Teaching strategies and achievement of Common Core …

Signs Of Autonomy: Facilitating Independence And Inquiry In Deaf Science Classrooms, Sami Kahn, Allan Feldman, Michele L. Cooke

Journal of Science Education for Students with Disabilities

Deaf and hard of hearing (DHH) persons are underrepresented in the fields of science, technology, engineering, and mathematics (STEM). One of the major barriers to STEM careers is DHH students’ extremely low college graduation rates. While social and literacy barriers play a critical role in this phenomenon, student autonomy has also been cited as a major contributor. DHH students have been characterized as dependent learners, a learning style possibly reinforced by reliance on adults for disproportionate amounts of information, as well as a tendency of deaf educators to teach in highly structured, explicit manners. Dependent learning styles can impede autonomy …

Paraeducators Transition From Silent Partners To Collaborators With Science Teachers In Urban Middle Schools, Kimberly Staples Ph.D.

Journal of Science Education for Students with Disabilities

Within middle school classrooms a diverse body of students require specialized instruction and science teachers with unique abilities to implement a reform-based science curriculum. To achieve the goal of success for all, students who are English language leaners and with exceptionalities, such as learning disabilities, and emotional and behavioral disorders, are often assigned paraeducators to support science learning. However, professional development often focuses on immersing paraeducators through a broad model of curricular modifications and general support strategies. This study reports findings of a three-year professional development project for middle level science teachers and paraeducators designed to increase science conceptual understanding …

A Tree-Ring Based Reconstruction Of Logan River Streamflow In Northern Utah, Eric B. Allen, Tammy M. Rittenour, R. Justin Derose, Matthew F. Bekker, Roger Kjelgren, Brendan M. Buckley

Wasatch Dendroclimatology Research

[1] We created six new tree-ring chronologies in northern Utah, which were used with preexisting chronologies from Utah and western Wyoming to reconstruct mean annual flow for the Logan River, the largest tributary of the regionally important Bear River. Two reconstruction models were developed, a “Local” model that incorporated two Rocky Mountain juniper chronologies located within the basin, and a “Regional” model that also included limber pine and pinyon pine chronologies from a larger area. The Local model explained 48.2% of the variability in the instrumental record and the juniper chronologies better captured streamflow variability than Douglas-fir collected within the …

Ambientalismos De La Vida Cotidiana: Políticas De Coalición, Reproducción Social Y Justicia Ambiental, Giovanna Di Chiro

Environmental Studies Faculty Works

This paper examines the intersectional, coalition politics forged by activists in US environmental justice and women's rights organisations. This coalitional politics articulates environmental and feminist concerns and rejects the limitations of a narrow-focused politics in favour of a more strategic, relational vision of social and environmental change. Framed by the Marxist-feminist concept of “social reproduction”, the analysis addresses the complex ways that globalised capitalism has transformed state and corporate responsibilities for social reproduction. The neoliberal policies of privatisation and deregulation have eroded the assurance of a liveable wage, affordable healthcare, decent education, breathable air, and clean water. Drawing on several …

Molecular Hydrogen Regulated Star Formation In Cosmological Smoothed Particle Hydrodynamics Simulations, Robert Thompson, Kentaro Nagamine, Jason Jaacks, Jun-Hwan Choi

Physics and Astronomy Faculty Publications

Some observations have shown that star formation (SF) correlates tightly with the presence of molecular hydrogen (H₂); therefore, it is important to investigate its implication on galaxy formation in a cosmological context. In the present work, we implement a sub-grid model (hereafter H₂-SF model) that tracks the H₂ mass fraction within our cosmological smoothed particle hydrodynamics code GADGET-3 by using an equilibrium analytic model of Krumholz et al. This model allows us to regulate the SF in our simulation by the local abundance of H₂ rather than the total cold gas density, which naturally …

A Tree-Ring Based Reconstruction Of Logan River Streamflow, Northern Utah, Eric B. Allen, Tammy M. Rittenour, R. Justin Derose, Matthew F. Bekker, Roger Kjelgren, Brendan M. Buckley

Geosciences Faculty Publications

We created six new tree‐ring chronologies in northern Utah, which were used with preexisting chronologies from Utah and western Wyoming to reconstruct mean annual flow for the Logan River, the largest tributary of the regionally important Bear River. Two reconstruction models were developed, a “Local” model that incorporated two Rocky Mountain juniper chronologies located within the basin, and a “Regional” model that also included limber pine and pinyon pine chronologies from a larger area. The Local model explained 48.2% of the variability in the instrumental record and the juniper chronologies better captured streamflow variability than Douglas‐fir collected within the Logan …

The Apostles And Brothers Of Jesus, Andrew Sills

Mathematical Sciences: Faculty Publications

Excerpt: The Talpiot tomb, a tomb excavated outside Jerusalem in 1980 and brought to worldwide public attention in 2007, contained ten ossuaries, six of which were inscribed with names. The English equivalents of the names are Jesus son of Joseph, two Marys, a rare diminutive form of Joseph, a diminutive of Matthew, and a Judah son of Jesus. Because of the similarities between this collection of names and certain names appearing in the Christian New Testament, some are curious as to whether the Talpiot tomb may have once interred the remains of Jesus of Nazareth and some of his relatives. …

Temperature-Dependent Dielectric And Thermal Properties Of Whey Protein Gel And Mashed Potato, Jiajia Chen, Krishnamoorthy Pitchai, Sohan Birla, Ricardo Gonzalez, David Jones, Jeyamkondan Subbiah

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Temperature-dependent dielectric properties (dielectric constant and dielectric loss factor) and thermal properties (thermal conductivity and specific heat capacity) of whey protein gel and mashed potato were measured from -20°C to 100°C. A dielectric properties measurement system and a multipoint temperature calibration protocol were developed. The system consists of an impedance analyzer, a high-temperature coaxial cable, a high-temperature coaxial probe, a micro-climatic chamber and a metal sample holder. Calibrations at two temperatures (25°C and 85°C) were sufficient to accurately measure the dielectric properties of foods from frozen to hot temperatures. Both dielectric constant and dielectric loss factor rapidly increased from -20°C …

Recasting Assessment To Transform Learning: An Integrated Approach, Kathleen M. Williamson

Biennial Convention (CONV)

Session presented on: Sunday, November 17, 2013:

This symposium will provide a comprehensive overview of the details of the transformational process of one School of Nursing's journey in refocusing and realigning outcomes to improve student learning and achievement. Presented will be the process faculty underwent in preparing for professional accreditation and developing a more meaningful assessment plan in connecting best practices to curriculum in order to assess student outcomes. The assessment process of how one school of nursing moved from an end of program evaluation to a more comprehensive look at the assessment of student learning, as well as student …

Open Access: Myths And Misconceptions In Scholarship And Publishing, Kimberly S. Thompson, Renee M. Wilmeth

Biennial Convention (CONV)

Special Session presented on: Monday, November 18, 2013:

Everyone in academe, publishing and research seems to be discussing Open Access, but the more information that becomes available, the more questions academics, scholars, writers, publishers and researchers have. What is green road? Should scholars pay to publish in journals? How does peer review fit in? What about libraries? Copyrights? Hybrid journals and other publishing options? This unique session will provide an overview of open access from STTI's lead informatics/librarian (and designer of the Henderson full-text repository) and STTI's publisher who leads the journal publishing program. The two will describe the current …

How Aasl Learning Standards Inform Acrl Information Literacy Standards, Lesley S. J. Farmer

Communications in Information Literacy

ACRL and other academic librarians are currently re-examining the tough questions of learning, literacy, and education -- and the librarians' role in addressing these issues. They can use AASL's learning standards as one springboard for thought, particularly in terms of articulating learning. The result is a developmentally appropriate set of standards that reflects lifelong engagement with, and creation of, recorded information.

Information Literacy And Digital Literacy: Competing Or Complementary?, Rosanne Marie Cordell

Communications in Information Literacy

Digital Literacy is a more recent term than Information Literacy and is used for multiple categories of library users in multiple types of libraries. Determining the relationship between Information Literacy and Digital Literacy is essential before revision of the Information Literacy Standards can proceed.

Discovering Real-World Usage Scenarios For A Multimodal Math Search Interface, Keita Del Valle Wangari

Theses

To use math expressions in search, current search engines require knowing expression names or using a structure editor or string encoding (e.g., LaTeX) to enter expressions. This is unfortunate for people who are not math experts, as this can lead to an "intention gap" between the math query they wish to express, and what the interface will allow. m_in is a search interface that supports drawing expressions on a canvas using a mouse/touch, keyboard and images. We designed a user study to examine how the multimodal interface of m_in changes search behavior for mathematical non-experts, and discover real-world …