Equators Have At Most Countable Many Singularities With Bounded Total Angle, Pilar Herreros, Mario Ponce, J.J.P. Veerman

Mathematics and Statistics Faculty Publications and Presentations

For distinct points p and q in a two-dimensional Riemannian manifold, one defines their mediatrix Lpq as the set of equidistant points to p and q. It is known that mediatrices have a cell decomposition consisting of a finite number of branch points connected by Lipschitz curves. In the case of a topological sphere, mediatrices are called equators and it can benoticed that there are no branching points, thus an equator is a topological circle with possibly many Lipschitz singularities. This paper establishes that mediatrices have the radial …

A Comparison Of Benthic Macroinvertebrate Assemblages Between Perennial And Intermittent Headwater Streams Of The Mattole River In Northern California, Usa, Mason S. London

Cal Poly Humboldt theses and projects

Intermittent streams are common throughout the world and comprise 60% or more of total river lengths in the conterminous United States. Despite their prevalence, intermittent streams are understudied, particularly first-order headwater streams, which are vital for maintaining the function, health and biotic diversity of river networks. In June 2016, I sampled five intermittent and five perennial headwater streams in the Mattole River watershed in northwestern coastal California, USA, to compare benthic macroinvertebrate (BMI) assemblages between intermittent and perennial streams. BMI samples were collected using a 500µm mesh D-net at eight randomly located riffles along a 150-m reach, and then composited, …

Paleoecology Of Foraminifera From The Late Miocene - Early Pliocene Pullen And Saint George Formations, Northwestern California, Trenton J. Ryan

Cal Poly Humboldt theses and projects

The Pullen and Saint George formations are coeval late Miocene-early Pliocene sedimentary formations in northwestern California. The type localities of both formations were studied from a micropaleontologic perspective that focused primarily on Foraminifera, but with additional observations of other fossil groups to reconstruct their past depositional environments. The results obtained in this study provided a photomicrographic inventory of the microfossils from both formations, aided in investigating changes in paleobathymetry of the formations during the late Miocene and early Pliocene based on Foraminifera, and allowed for interpretation of paleoecological signals from the foraminiferan associations. Foraminifera have not been previously described in …

Do The Arts Play An Essential Role In Stem Subjects? How Steam Professional Development Affects Teacher Intent To Teach Subjects In An Integrative Manner., Stacy N. Young

Cal Poly Humboldt theses and projects

STEAM, an acronym for Science, Technology, Engineering, Arts and Mathematics, is an approach to teaching that integrates these subjects together for deeper inquiry and innovation. I surveyed teachers prior to the region 1 STEAM conference in January 2017 and after to determine if they intended to change their teaching practices to integrate what they learned at the conference. Follow-up interviews were conducted to clarify survey results. Research suggests that professional development is a key component to changing teacher practices. This study seeks to extend the assertion that a conference can be the catalyst professional development tool to change teacher practice. …

The Water-Electricity Nexus In California: Drought-Induced Risk To Thermal Electricity Generation, Timothy S. Hyles

Cal Poly Humboldt theses and projects

Investigating the possibility that drought might limit the water supply needed for thermal electricity generation in California, power plant water consumption data was compared to urban and agricultural consumptive demands to identify areas where power plants might contribute to regional water stress. To identify areas where power plants might be impacted by water stress, regional power plant, urban, and agricultural water demands were also compared to the available water supply. A list of power plants that would contribute most to regional water scarcity (individually and in aggregate) was highlighted, based on the plant’s water consumption volume, water-intensity, and water source. …

The Influence Of Canopy Cover And Climate On Early Life-Stage Vital Rates For Northern Red-Legged Frogs (Rana Aurora), And The Implications For Population Growth Rates, Kecly Mcharry

Cal Poly Humboldt theses and projects

Many amphibian species are in decline due to habitat loss and changing climates. Understanding how habitat characteristics and climate influence vital rates, and if they act in concert or in opposition can inform management decisions. This study investigated the potential interaction of canopy cover and climate on early stage vital rates of northern red-legged frogs. Demographic data were collected from sample populations in experimental canopy cover treatments across a latitudinal distribution. Rearing cages were used to estimate hatch success, and mark-recapture surveys to estimate tadpole survival. Ambient air temperature was used as an index of climate because it is easily …

Sedimentation And Erosion Patterns Within Anabranching Channels In A Lowland River Restoration Project, Ivan Medel

Cal Poly Humboldt theses and projects

Phase 2A of the Salt River Ecosystem Restoration Project (SRERP) was implemented to increase transport efficiency of water and sediment through a low gradient river reach to alleviate flooding on adjacent properties. The SRERP utilizes a unique anabranching channel design that concentrates base flows within a single deep, narrow channel overflowing onto an alternating series of higher elevation active benches at flood stages. This paper investigated the performance of the project’s hydraulic conveyance and general utility of anabranching channels as a restoration alternative by assessing the distribution and magnitude of deposition and erosion response patterns.

Aggradation was not observed within …

A Population Model For Coho Salmon (Onchorhynchus Kisutch) In Freshwater Creek: Evaluating The Effects Of Life History Variation And Habitat Restoration, Gabriel Scheer

Cal Poly Humboldt theses and projects

Historic land use practices and associated habitat degradation have led to significant declines in coho salmon (Oncorhynchus kisutch ) populations across their range. In California they are a state and federally listed species, requiring population monitoring and management plans tailored towards recovery. Traditionally, juvenile coho salmon in California were thought to spend approximately one year in their natal freshwater habitats before migrating to sea the following spring and summer as smolts. However, recent work has documented considerable variation in juvenile life history and migration timing. Specifically, juveniles that migrate downstream prior to one year of age and spend their …

Juvenile Remains: Predicting Body Mass And Stature In Modern American Populations, Erin F E Pinkston

Cal Poly Humboldt theses and projects

There are increasing numbers of unidentified persons in the U.S. and abroad. To generate positive identifications, forensic anthropologists and others working in the medicolegal field employ a variety of methods to produce biological profiles to match to case files and missing persons databases. Body mass, and stature are two important components of a biological profile, and both can be estimated using regression formulae derived from skeletal metrics. In cases of unidentified juvenile remains, these are particularly important metrics, as it is difficult or impossible to determine sex in prepubescent remains, and the quality of ancestry estimation is currently under debate …

Finding Nondestructive Parameters For Root-To-Shoot Ratios In Douglas-Fir, Grand Fir, And Redwood Saplings In Northwest California For Biomass And Carbon Storage Estimates, Walter A. Kast

Cal Poly Humboldt theses and projects

ABSTRACT

FINDING NONDESTRUCTIVE PARAMETERS FOR ROOT-TO-SHOOT RATIOS IN DOUGLAS-FIR, GRAND FIR, AND REDWOOD SAPLINGS IN NORTHWEST CALIFORNIA FOR BIOMASS AND CARBON STORAGE ESTIMATES

Walter A. Kast

There is a need for better understanding of how woody biomass is allocated above and belowground and how this allocation might differ among tree species. In this field of research, investigators face challenges such as the laborious task of removing trees from the soil with destructive sampling, and the cleaning, drying, and weighing of belowground biomass (BGB). Therefore, researchers and practitioners most often rely on existing models to predict BGB from easily-measurable aboveground variables …

Weight Perception And Weight Loss Behaviors: A Comparison Between Adolescents With And Without Autism Spectrum Disorder, Elanor J. Anderson

Cal Poly Humboldt theses and projects

OBJECTIVE: The primary purpose of this study is to investigate the accuracy of weight status perception among adolescents with and without Autism Spectrum Disorder. A secondary purpose is to compare weight loss behaviors between children with and without ASD.

METHODS: This study measured weight-perception and weight loss behaviors among Irish-thirteen-year olds with ASD (n=47) and typically developing (TD) children (n=47) (72% male). Participants completed questionnaires assessing perception of weight and weight loss behaviors. . Based on BMI, calculated from height and weight measurements, participants were classified as non-overweight, overweight and obese. Several Chi-square tests were used to examine (1) differences …

Effectiveness Of Teacher Training On The Use Of Universal Design Learning Strategies With Special Education Students In Middle School, Seanessy W. Gavin

Cal Poly Humboldt theses and projects

In inclusive classrooms, the framework of Universal Design for Learning (UDL) presents a viable schema to inform instructional materials, lesson design, and teaching practices to meet the needs of diverse groups of learners. UDL principles and guidelines emphasize using multiple means of representation, action, and engagement to employ different learning networks and address the multitude of learners in the classroom, with the hopeful outcome of benefiting all students. Current literature has yielded inconclusive results about the concrete effects of the UDL framework, including an ongoing challenge in defining UDL practice in the classroom. This quantitative study explored UDL practices in …

Evidence-Based Assessment In Adapted Physical Education-Cognitive Outcomes: A Meta-Analysis, James Robert Kunkel

Cal Poly Humboldt theses and projects

There is little data to show evidence-based practices in adapted physical education and whether or not such practices are successful. Currently there is a lack of information on the frequency of which assessments are being administered, on the disabilities that are being assessed or should be assessed during each test, and on the uses for which assessments are being conducted. The aim of this paper is to assess and synthesize all evidence-based practices on cognitive outcomes in adapted physical education using a meta-analysis. Data was sourced from computerized searches using the following databases: SPORT Discus, PsycINFO, PsycARTICLES, Pub Med (Medline), …

A Multiple Case Narrative Examining The Experiences Of Alumni Of A Minority Research And Training Program, Gretchen Schneider Burton

LSU Doctoral Dissertations

The implementation of minority research and training (MRT) programs at the post secondary level has risen to close the educational achievement gap and build undergraduate pathways to generate a highly skilled and diverse STEM pool. Although the numbers of advanced science related degrees have slowly increased over the past decade, partially due to the utilization of MRT programs, this increase has not been adequate to establish an impactful representation in either academic or industry research careers. Numerous studies identify various support interventions influencing positive outcomes among MRT participants achieving graduate degrees. However, majority of the studies utilize quantitative or a …

Sotl In The Lis Classroom: Helping Future Academic Librarians Become More Engaged Teachers, Lindsay Mcniff, Lauren Hays

Communications in Information Literacy

In this paper, we share background and key considerations of the Scholarship of Teaching and Learning (SoTL), and propose introducing library and information science (LIS) students to SoTL as a way to acquaint them with the higher education teaching profession. Throughout the article, we employ reflection as the primary consideration and support structure that frames the benefits of SoTL for instructional growth. Four critical stages of SoTL training, first suggested by Gale and Golde (2004), are recommended for LIS students: Exposure, Encounter, Engagement, and Extension. As instruction responsibilities and opportunities continue to expand in academic librarianship, teaching about SoTL using …

Setting Them Up For Success: Assessing A Pre-Research Assignment For First-Year International Students, Susan Avery

Communications in Information Literacy

As the international student population continues to grow, librarians must adjust their instruction to meet the needs of students who are adapting to a new country, culture, and language. This study assesses first-year international students as they engage in the research process through the completion of concept maps that precede database searches. Librarians assessed concept maps of international students completed prior to information literacy instruction to better understand the difficulties they experienced defining research topics and identifying keywords and alternatives. The results of this assessment provide a deeper understanding of the challenges first-year international students face with creating search strategies. …

Library Experience And Information Literacy Learning Of First Year International Students: An Australian Case Study, Hilary Hughes, Nerilee Hall, Megan Pozzi

Communications in Information Literacy

This qualitative case study provides fresh understandings about first year undergraduate international students’ library and information use at an Australian university, and their associated information literacy learning needs. The findings provide evidence to inform the development of library spaces and information literacy responses that enhance international students’ transition and learning. The study was conducted in 2015 as part of a project that simultaneously investigated the same topic at three US universities. This paper presents the case study context, reviews relevant literature and identifies gaps in research about international students’ library use and information literacy, and outlines the qualitative methodology—questionnaire, interviews …

The Intersection Of Information And Science Literacy, Kristin M. Klucevsek

Communications in Information Literacy

To achieve higher science literacy, both students and the public require discipline-specific information literacy in the sciences. Scientific information literacy is a core component of the scientific process. In addition to teaching how to find and evaluate resources, scientific information literacy should include teaching the process of scholarship as a conversation and publication in the sciences. Faculty and librarians can be challenged in their efforts to teach students because of limited access to published research. Stronger scientific information literacy and more access to scholarly research could improve science literacy as a whole.

The Role Of Defects In The Metal-Nonmetal Transition In Metallic Oxide Films, Gaomin Wang

LSU Doctoral Dissertations

Metal-nonmetal transition, or more specifically, metal-insulator transition (MIT) has been one of the most intriguing topics in condensed matter physics. Two theories describing fundamental driving mechanisms of MIT has been well-established over time: Mott-Hubbard theory and Anderson localization theory. The former mainly deals with contribution of electron interactions/correlations to the MIT, and the latter focuses on the role of disorder. However, it is an open topic how a system behaves when both effects exist in a system. This study mostly takes interest in a type of MIT induced by dimensionality-crossover in the transition metal oxides (TMOs) systems. TMO system is …

Understanding How Incoming First Year College Students Develop Academic Performance Expectations: A Qualitative Case Study, Christina Marie Coovert

LSU Doctoral Dissertations

The purpose of this research study was to explore how incoming first year students develop their academic performance expectations, differences between students in the development of academic performance expectations, and lastly the role of the university has in communicating expectations to students. The researcher utilized case study research to examine various perspectives related to the development of academic performance expectation. Research methodology included, participant interviews, document analysis and observation. Research findings are highlighted by ten first year college students’ experiences; half of the participants were previously higher performing and the other half were previously lower performing. Performance was based on …

Descendants Of Abraham: A Comparative Approach To Jewish And Islamic Rhetorics, Brandon Katzir

LSU Doctoral Dissertations

Descendants of Abraham: A Comparative Approach to Jewish and Islamic Rhetorics provides two important correctives to modern scholarship. It emphasizes the importance of Jewish and Islamic rhetorics typically neglected by Western-centric historians of rhetoric, and it showcases the cultural relationship between Jews and Muslims that has been typically occluded by modern scholarship. Focusing on the early Islamic world, I demonstrate instantiations of interconnectivity between Jewish and Islamic rhetoric in Arabic from the 9th-12th centuries CE. Specifically, I look at how judicial rhetoric plays an important role in the adjudication of halakha and sharia, followed by a consideration of theological rhetoric …

Numerical Simulations Of Mass Transfer In Close And Contact Binaries Using Bipolytropes, Kundan Vaman Kadam

LSU Doctoral Dissertations

We present the first self-consistent, three dimensional study of hydrodynamic simulations of mass transfer in close and contact binary systems, with both stars represented as bipolytropes (composite polytopes). The project is motivated by the recent eruption of V1309 Scorpii which was proved to be the merger of a contact binary system. The final eruption is assumed to be the disruption of the core of the secondary inside the more massive star. The initial, equilibrium binary models are rotating synchronously in circular orbits and are obtained using the Bipolytropic Self Consistent Field (BSCF) technique, which is a modi cation of Hachisu's …

Design, Synthesis, And Evaluation Of Innovative Bodipy-Peptidic Conjugates For Biological Application, Tyrslai Menyaee Williams

LSU Doctoral Dissertations

Abstract Chapter 1 provides a brief introduction to colorectal cancer (CRC), methods of detection, photodynamic therapy (PDT), and EGFR as an attractive targeting strategy for imaging CRC. Chapter 2 details the synthesis of ten peptide sequences for targeting EGFR receptors at the site of CRC, as a collaborative work with Dr. Seetharama Jois. This chapter also investigates the efficacy of these peptides for EGFR. Chapter 3 offers the first synthetic strategy for developing BODIPY-peptide conjugates via amide linkages. All conjugates were optimized for the best reaction conditions and good yields were observed. Each conjugate was subjected to photophysical, SPR, and …

The Holistic Undergraduate Growth Experience: A Case Study Exploring The Development Of A Student Success And Retention Program, Bianca Briana Teats

LSU Doctoral Dissertations

This case study depicted the development and implementation of the Holistic Undergraduate Growth Experience (HUGE) student success and retention program that spans the second year of undergraduate study to graduation. This study set out to expand student development theory and practice to include an international perspective, specifically one from the Middle East. An increased amount of attention was dedicated to examining the development of the aforementioned program than to its actual implementation in order to provide a more comprehensive framework. Based on the findings associated with this study, recommendations were made not only to the host institution for the study, …

Chemical Synthesis: New Methods For O-Glycosylation And The Preparation Of Organic Thin Films, Rashanique Deondria Quarels

LSU Doctoral Dissertations

This dissertation focuses on the diverse use of chemical synthesis. Herein, I will discuss the use of synthetic organic chemistry for the modification surfaces and the synthesis of small molecules. Chapter One is an introduction to the realm of surface chemistry. I have highlighted some key methods for surface modification. Additionally, methods to characterize the as-formed thin films are also outlined. In Chapter Two, I discuss the use of visible-light photoredox catalysis in the nanoscale lithography of Au(111) surfaces. Blue LED irradiation of solutions of NBDT in the presence of Ru(bpy)32+ results in the formation of p-nitrophenyl radicals that graft …

An Evaluation Of U.S. National Wildlife Refuge Planning For Off-Road Vehicle Use, Robert L. Fischman, Vicky J. Meretsky, Katie Freeman, Alexi Lamm, Leah Missik, Scott Salmon

Articles by Maurer Faculty

Off-road vehicles (hereafter, ORVs) rank high among public-land management challenges because they are popular, often impair environmental conditions, and may cause conflicts with other recreational users. Unit-level planning for federal lands increasingly translates broad, system-wide objectives, such as maintenance of ecological integrity, into place-based limitations on ORV use to minimize and mitigate adverse impacts on wildlife. We reviewed 176 planning documents covering 313 National Wildlife Refuges (hereafter, Refuges) to understand how planning supports or undermines ORV recreation management. These plans offer an important perspective on ORV management because the Refuges are a large, diverse system of conservation lands where recreation …

Effect Of Metal Speciation In Fly Ash On Environmentally Persistent Free Radical Formation, Elisabeth Eileen Cook

LSU Doctoral Dissertations

Waste incineration and Superfund sites lead to the formation of pollutants harmful to both the environment and human health. Environmentally Persistent Free Radicals (EPFRs) are a class of newly discovered radical pollutants known to form on combustion by-products such as fly ash and particulate matter. EPFRs are rapidly gaining attention for their harmful effects on the environment and human health. Previous research has shown the formation of EPFRs through surface-mediated reactions with transition metal-oxides on particulates. The work presented in this dissertation explores the relationship between fly ash composition and EPFR formation. Fly ash production occurs from combustion systems, namely …

A Palynostratigraphic Investigation Of Holocene Coastal Texas Bays: Implications For Future Coastal Change, Shannon Marie Ferguson

LSU Doctoral Dissertations

Although the Gulf of Mexico is one of the most studied basins in the world, a majority of the focus has been driven by petroleum exploration and/or on seismic and sedimentological facies models. Rarely has the intent of previous studies been to characterize the Holocene climatic record of coastal Texas. Of those studies that discuss Holocene vegetation change, the majority focus on the Mississippi River Delta, the Edwards Plateau or central Florida, leaving an absence of insight to western Gulf of Mexico climate changes. The Texas coastline stretches 595 km across almost 4° of latitude and the strong northwestern precipitation …

Symphony No. 1 And The Development Of New Techniques In Contemporary Music Composition, Eric Lacy

LSU Doctoral Dissertations

The initial part of this dissertation is a symphony. Symphony No. 1 consists of three movements. Each movement begins with a monumental gesture designed to make a bold and unforgettable statement. Within each movement, there is an interesting array of harmonic and rhythmic schemes. In Symphony No. 1, the diametrically opposed concepts of “simple” and “complex” are featured prominently. These concepts are contrasted thematically, rhythmically, and harmonically. The next part of this dissertation establishes the existence of certain obstacles facing contemporary composers and the benefits of developing new techniques in composition. The music of György Ligeti and Arvo Pärt are …

Aleksander Peçi Before And After The Iron Curtain, Elida Dakoli

LSU Doctoral Dissertations

Abstract This research describes the life, compositional style and works of one of the most well-known Albanian composers, Aleksander Peçi, focusing on how the political climate affected his life and his art. Several of Peçi’s techniques are examined, including Carousel structure, Cartesian Production, Kabaoisos, and Polygravité. Albanian iso-polyphony and its influence on Peçi’s work are discussed. The research was done in hopes of reaching a better understanding of the effects Communism and the subsequent period of freedom have had on Albanian music.