Digital Commons Network^™

Coho Salmon (Oncorhynchus Kisutch) Dispersal And Life History Variations Among Humboldt Bay Watersheds, Madison J. Halloran

Cal Poly Humboldt theses and projects

The decline of Coho Salmon (Oncorhynchus kisutch) in California is the result of various anthropogenic effects across the landscape, affecting all stages of their anadromous life history. Monitoring a subset of the remaining populations is essential to evaluate the success of management actions and develop new restoration projects. Defining the appropriate spatial scale for this monitoring and restoration depends on the frequency and extent of dispersal of individuals across watershed boundaries. Coho Salmon life-cycle monitoring projects in California estimate the abundance of juveniles and adults over time in selected focal watersheds. If individuals frequently enter or leave the …

Assessing Convergent Validity Of The Qabf And Tbh Fa Intake Form With Results Of A Functional Analysis, Melissa Cisneros

Cal Poly Humboldt theses and projects

The current study looked to compare and analyze the convergent validity of the Questions About Behavioral Function (QABF) with Trumpet Behavioral Health’s current form, the Functional Assessment Intake Form. Both forms were compared with results gathered from a functional analysis conducted on individuals with identified challenging behaviors (e.g. body dropping and self- injurious behaviors). A multi-element design was used to conduct a functional analysis, and identified functions from the indirect assessments were compared to the results found in the functional analysis. Results indicated that there was no correspondence between the indirect assessments used with the results from the functional analysis. …

Phylogenetic And Population Genetic Analysis Of The Humboldt's Flying Squirrel Using High-Throughput Sequencing Data, Stella Chi Yuan

Cal Poly Humboldt theses and projects

The intraspecific genetic variation and diversity within the Humboldt’s flying squirrel (Glaucomys oregonensis) has not yet been characterized despite its elevation to full species in 2017. The San Bernardino flying squirrel (G. o. californicus) is thought to be the southernmost population of G. oregonensis and is restricted to the San Bernardino and San Jacinto Mountains in California, but recent surveys indicate they have been extirpated from the latter locality. In order to provide baseline genetic data across the geographic range of G. oregonensis, I had the following objectives: 1) investigate the intraspecific molecular variation in …

Estimates Of Calf Survival And Factors Influencing Roosevelt Elk Mortality In Northwestern California, Erin Nigon

Cal Poly Humboldt theses and projects

Survival of juvenile ungulates is known to be highly variable, yet it is fundamental to understanding the dynamics and trends of wildlife populations. Factors influencing calf survival are poorly understood in northwestern California where Roosevelt elk (Cervus canadensis roosevelti) are known to exist. The objectives of this study were 1) to estimate summer and annual survival rates and determine recruitment rates for Roosevelt elk calves in the area, 2) to evaluate differences in calf survival by examining the effects of individual and population level covariates on summer and annual calf survival, 3) to identify factors influencing the timing …

From Screen To Summit: An Investigation Of Claims About Social Media Use For Outdoor Recreation Purposes, Theodora M. Doyon

Cal Poly Humboldt theses and projects

Recent increases in visitation to public lands in the U.S. are often attributed to a rise in social media sharing of outdoor spaces, and particularly to the use of geotagging and hashtagging for location sharing. There are conflicting views on the influence of social media on visitation to public lands, including negative perceptions of social media users, and positive perceptions of social media’s potential to spread information to underrepresented and underserved communities. Due to the growing interest in social media use and its effects on outdoor spaces, it is important to understand how social media use correlates with recreational behavior …

The Tera Multi Terrain Mobility Aid Chassis, Colton Kemp, Daniel Nicoll, Ibrahim Suleiman, Mohammad Alyami

Williams Honors College, Honors Research Projects

The natural environment poses a significant number of obstacles and dynamic settings that makes mobility difficult for those with physical and mobility impairments. To approach this problem, a suspension was designed using inspiration from the early Mars rovers developed by NASA for traversing the varied Martian landscape. The course of the project followed the direction of a start-up through problem identification, early design generation and review, and final design production. The project outcome, through client request and proven market research, aimed to produce a multi-terrain wheelchair. The final product is a kinematic body with mobile front “legs” and a rotational …

Training Postural Control With Eyes Closed Vs. Eyes Open And Effects On Postural Control Improvement, Mark D. Ulbricht

Cal Poly Humboldt theses and projects

Introduction: Ankle sprains are one of the more common injuries in an athletic population. Postural control training can be used in prevention and rehabilitation for ankle sprains. When used preventively postural control training can decrease the risk of sustaining an ankle sprain by 38% (McGuine & Keene, 2006). There are a variety of postural control training programs all emphasizing different aspects of postural control, such as eyes closed, or eyes open situations. Training protocols with either eyes closed or eyes open have been shown to improve both static and dynamic postural control (Zech et al., 2010). The purpose of this …

Spatial And Temporal Genetic Structure Of Winter-Run Steelhead (Oncorhynchus Mykiss) Returning To The Mad River, California, Steven R. Fong

Cal Poly Humboldt theses and projects

Distinct populations of steelhead in the wild are in decline. The propagation of steelhead in hatcheries has been used to boost population numbers for recreational fisheries and for use in conservation. However, hatchery breeding practices of steelhead can result in changes in genetic structure. I investigated the genetic structure of winter-run steelhead (Oncorhynchus mykiss) returning to the Mad River, California, where a hatchery has been used enhance production for recreational fisheries since 1971. Genetic variability in Mad River steelhead was evaluated using 96 single nucleotide polymorphisms (SNPs) among 4203 individuals, including the Mad River and nearby locations, and …

Constructing Commonmentalities: Toward Collaborative Governance, Knowledge And Subjectivity, Imil Ferrara

Cal Poly Humboldt theses and projects

Western society’s intractable social and environmental problems arise outside the bounds of classical liberal ideation, challenging the utilitarian rationality, decision-making faculty, and popular legitimacy of our liberal institutions. Through a qualitative analysis of three collaborative, community-based institutions, this study aims to identify and illuminate alternative conceptions and organizational relationships, which transcend liberal shortcomings and succeed precisely where liberal institutions have failed. It draws on Michel Foucault’s account of liberal governance, discourse and subject formation, but employs a complex-systems lens to move from critical deconstruction to intentional normative construction, from radical subjectivism to a collaborative pragmatic realism, and from the critique …

One-Way Immersion Education Educación De Inmersión Unidireccional, Angela Renée Rivera

Cal Poly Humboldt theses and projects

Teachers in Spanish immersion schools, schools that teach a majority of English only speakers or in a one-way immersion model, face unique challenges in meeting their students' language and learning needs. The goal of this study is to identify the curriculum and resources teachers in one-way immersion schools use in their classroom to meet these student needs. The basic design of the study includes individual interviews with questions focused on the curriculum and assessment teachers use, the pedagogical practices they implement and the advice they have for other immersion teachers in the field. A qualitative analysis of the data indicates …

Cost-Benefit Analysis Of Replacing Lpg Stoves With Induction Stoves In Rural Households Of Kavre District Nepal, Grishma Raj Dahal

Cal Poly Humboldt theses and projects

Nepal imports nearly 260,000 tons of Liquified Petroleum Gas (LPG) and other fossil fuels annually from India. This fuel dependency is one of the main reasons for Nepal’s trade deficit with India. The Government of Nepal has recently started promoting electric induction stoves for cooking as an alternative to LPG. Induction stoves are pollution free at the point of use, and they are meant to reduce Nepal's dependence on LPG.

This study includes a cost-benefit analysis for replacing LPG stoves with induction stoves for households in rural areas of Kavre District, Nepal. The study involved the use of data for …

Comparing Environmental Dna And Traditional Monitoring Approaches To Assess The Abundance Of Outmigrating Coho Salmon (Oncorhynchus Kisutch) In California Coastal Streams, Emerson Alan Kanawi

Cal Poly Humboldt theses and projects

Environmental DNA (eDNA) has the potential to dramatically increase the information available to managers regarding species distribution and abundance. Collection of reliable survey information on fish abundance is essential to monitor population trends and restoration efforts for endangered and threatened species. In Northern California, coho salmon are a federally listed species and a focus of ongoing monitoring programs and restoration projects. I examined the feasibility of using eDNA to supplement, or replace, traditional outmigrating juvenile coho salmon monitoring approaches currently used at two existing coho salmon life-cycle monitoring stations. Over the spring of 2018 and spring of 2019, I collected …

"This Is Home:" Pictures, Place Meaning, And Community In The Natural-Amenity-Rich Del Norte County, California, Erik Arndt

Cal Poly Humboldt theses and projects

This study contributes to the existing, yet small, cadre of research using photo elicitation to investigate the place meanings of people living in a natural-amenity-rich area. Ten current and former residents of Del Norte County, California took pictures of and discussed in an interview the people, places, and attributes they found valuable or meaningful about that place. The primary focus of the photos and interviews was how these natural amenities, in particular Jedediah Smith Redwoods State Park, impacted or influenced residents’ place meanings. Three major themes of place meaning were identified from the interviews: Environment-Landscape, Human-Social, and Recreation-Exploration. Each contained …

Age-Specific And Species-Specific Tree Response To Seasonal Drought In Tropical Dry Forests, Emily A. Santos

Cal Poly Humboldt theses and projects

Millions of people live in or depend on ecoregions dominated by Tropical Dry Forests (TDFs), but due to their high accessibility, convenient topography and mild climate conditions their distribution is fragmented with less than 10% of their original extent remaining in many countries. Despite the vast ecosystem services provided by TDFs, including vital water resources in water limited environments, ecohydrological research in this biome has been limited to a small number of short-term investigations. Similar to worldwide trends, the TDF surrounding Bahía de Caráquez (Bahía), Ecuador, has been severely deforested over the past 400 years. The land use history in …

Species Distribution Models For Three Deep-Sea Coral And Sponge Taxa In The Southern California Bight, Nissa Kreidler

Cal Poly Humboldt theses and projects

Deep-Sea Coral and Sponge (DSCS) species are signature taxa of deep-water habitats, however understanding the ecological mechanisms that drive their geographic distributions can be difficult to uncover due to the challenges of surveying deep-water ecosystems. A recent study on benthic assemblages in Southern California revealed statistical associations between several DSCS and demersal fishes, many of which are important to management agencies due to commercial or conservation concerns. Maps that predict where these DSCS may occur are needed for the management and protection of these DSCS taxa and the fauna that rely on them for habitat. In this thesis, I develop …

Growth Of Juvenile Red Abalone (Haliotis Rufescens) Fed Different Seaweed-Based Diets, Quinn C. Wulffson

Cal Poly Humboldt theses and projects

The rise of abalone aquaculture has mitigated most of the global demand placed on wild stocks of abalone; however, the current production of abalone relies heavily on naturally harvested kelp. The continued reliance on wild kelp as a feed source further contributes to the disappearance of kelp forests throughout coastal ecosystems. This study aims to better understand how juvenile red abalone Haliotis rufescens grow and utilize nutrients from three diets: a control diet of naturally harvested bull kelp Nereocystis luetkeana, a formulated commercial diet (ABKelp^®), and Pacific dulse Palmaria mollis produced using Integrated Multi-Trophic Aquaculture (IMTA). Juvenile …

Sediment Yield In Salmon Creek After Decommissioning Logging Roads, Northern Humboldt County, California, Malia S B Gonzales

Cal Poly Humboldt theses and projects

Salmon Creek watershed is located in the Headwaters Forest Reserve in northern California and is known for the ecological value of its old-growth redwood forest, high biodiversity, and sensitive habitat for endangered species. The Bureau of Land Management primarily manages the Reserve. The land-use history of the Upper Salmon Creek watershed includes extensive timber harvest and road development. Watershed restoration in the Upper Salmon Creek watershed started in 2000 with the primary goal for the Reserve to protect and recover ecologic diversity and threatened native species. Since then, of the 23 miles, 13.5 miles of logging roads and 101 stream …

The Effects Of Low-Level Pharmaceuticals On Stream Biofilm Structure And Function Across A Land-Use Gradient In Streams Of The Huron River Watershed, Elizabeth Mae Stover

Master's Theses and Doctoral Dissertations

Pharmaceuticals and personal care products (PPCPs) are a contaminant class of worldwide concern. Their environmental omnipresence indicates they may be a potential source of global change, and ecosystem-scale impacts at non-lethal levels have not been fully explored. We used stream biofilms to assess ecosystem responses to PPCPs. Biofilms were cultivated in streams draining areas of different land use and then exposed to triclosan, diphenhydramine, and sulfamethoxazole-trimethoprim treatments. We found evidence that low levels of these PPCPs affected some, but not all, aspects of biofilm processes and bacterial community composition. Bacterial carbon uptake was reduced (p = 0.06) and we found …

Student Success And Geography: An Analysis Of Contributing Factors That Determine College Academic Achievement And Persistence Of Black Males, Lamarcus D. Howard

Master's Theses and Doctoral Dissertations

The purpose of the study was to analyze the relationship between academic and nonacademic determinants of academic achievement and persistence and to identify how university geographic location influences the likelihood of Black male persistence. Quantitative data was drawn from the 2012/14 Beginning Postsecondary Students (BPS) Longitudinal Study (BPS: 12/14) conducted by the U.S. Department of Education National Center for Educational Statistics (NCES) to explore third-year academic achievement and persistence for Black males. This study identified two research questions, guided by the theoretical frameworks of Tinto’s student institutional departure model and Astin’s Input-Environment-Output model to assess Black male decisions to stay …

Legal Complexities Of The Sex Trafficking Of Minors, Christie Mccormick

Master's Theses and Doctoral Dissertations

Among human rights abuses in modern society, the trafficking of women and children for labor, prostitution, and other forms of sexual exploitation is one of the greatest. While a large amount of time and financial support has gone into efforts to suppress trafficking and shelter its victims, there has not been enough done to tackle this problem. Before reaching the age of 18, it is predicted that 80% of adolescents in the United States will have traded money for sex. Many adolescent girls who have been trafficked in the commercial sex industries are subject to serious criminal penalties for prostitution-related …

Oxygen, Ph, And Labile Organic Carbon As Possible Mechanisms For Algal Stimulation Of Bacterial And Fungal Production In Periphyton, Jennifer Nichole Harper

Master's Theses and Doctoral Dissertations

Algal photosynthesis can stimulate production of associated microbial heterotrophs; however,the mechanisms for this stimulation remain unknown. I incubated submerged Typha domingensis leaf litter in greenhouse mesocosms under low- and high-nutrient regimes and conducted microbial production assays after 79/80 (week 11) or 128/129 (week 18) days of colonization. I manipulated environmental factors (oxygen, pH, and labile organic carbon) affected by algal photosynthesis to test the hypothesis that one or more of these factors stimulates heterotrophic microbial production. In the low-nutrient treatments, bacterial production was increased by glucose addition during week 11 (p < 0.001) and by photosynthesis during week 18 (p < 0.05). Fungal production was stimulated by photosynthesis in the high-nutrient treatments during weeks 11 (p < 0.001) and 18 (p < 0.01) and by glucose during week 11 (p < 0.05). These results confirm that algal photosynthesis can increase heterotrophic microbial production and suggest that photosynthetic labile organic carbon (LOC) could be a stimulatory mechanism.

Implementing Algorithmic Crisis Alerts In Mhealth Systems For Veterans With Ptsd, Md Sazzad Hossain, Priyanka Annapureddy, Sheikh Iqbal Ahamed, Praveen Madiraju, Mark Flower, Lisa Rein, Thomas Kissane, Wylie Frydrychowicz, Naveen K. Bansal, Niharika Jain, Katinka Hooyer, Zeno Franco

Computer Science Faculty Research and Publications

This paper seeks to establish a machine learning driven method by which a military veteran with Post-Traumatic Stress Disorder (PTSD) is classified as being in a crisis situation or not, based upon a given set of criteria. Optimizing alerting decision rules is critical to ensure that veterans at highest risk for mental health crisis rapidly receive additional attention. Subject matter experts in our team (a psychologist, a medical anthropologist, and an expert veteran), defined acute crisis, early warning signs and long-term crisis from this dataset. First, we used a decision tree to find an early time point when the peer …

Saliva Microrna Biomarkers Of Cumulative Concussion, Steven D. Hicks, Robert P. Olympia, Cayce Onks, Raymond Y. Kim, Kevin J. Zhen, Gregory Fedorchak, Samantha Devita, Aakanksha Rangnekar, Matthew Heller, Hallie Zwibel, Chuck Monteith, Zofia Gagnon, Callan D. Mcloughlin, Jason Randall, Miguel Madeira, Thomas R. Campbell, Elise Fengler, Michael N. Dretsch, Christopher Neville, Frank A. Middleton

Rehabilitation Sciences Faculty Publications

Recurrent concussions increase risk for persistent post-concussion symptoms, and may lead to chronic neurocognitive deficits. Little is known about the molecular pathways that contribute to persistent concussion symptoms. We hypothesized that salivary measurement of microribonucleic acids (miRNAs), a class of epitranscriptional molecules implicated in concussion pathophysiology, would provide insights about the molecular cascade resulting from recurrent concussions. This hypothesis was tested in a case-control study involving 13 former professional football athletes with a history of recurrent concussion, and 18 age/sex-matched peers. Molecules of interest were further validated in a cross-sectional study of 310 younger individuals with a history of no …

Diagnosing Mild Traumatic Brain Injury Using Saliva Rna Compared To Cognitive And Balance Testing, Steven D. Hicks, Cayce Onks, Raymond Y. Kim, Kevin J. Zhen, Jayson Loeffert, Andrea C. Loeffert, Robert P. Olympia, Gregory Fedochak, Samantha Devita, Aakanksha Rangnekar, John Leddy, Mohammad N. Haider, Zofia Gagnon, Callan D. Mcloughlin, Matthew Badia, Jason Randall, Miguel Madeira, Aaron M. Yengo-Kahn, Justin Wenzel, Matthew Heller, Hallie Zwibel, Aaron Roberts, Samantha Johnson, Chuck Monteith, Michael N. Dretsch, Thomas R. Campbell, Rebekah Mannix, Christopher Neville, Frank Middleton

Rehabilitation Sciences Faculty Publications

BACKGROUND: Early, accurate diagnosis of mild traumatic brain injury (mTBI) can improve clinical outcomes for patients, but mTBI remains difficult to diagnose because of reliance on subjective symptom reports. An objective biomarker could increase diagnostic accuracy and improve clinical outcomes. The aim of this study was to assess the ability of salivary noncoding RNA (ncRNA) to serve as a diagnostic adjunct to current clinical tools. We hypothesized that saliva ncRNA levels would demonstrate comparable accuracy for identifying mTBI as measures of symptom burden, neurocognition, and balance.

METHODS: This case‐control study involved 538 individuals. Participants included 251 individuals with mTBI, enrolled …

Route Exploration And Synthesis Of The Reported Pyridone-Based Pdi Inhibitor Stk076545, Eric Greve, Sergey V. Lindeman, Christina Scartelli, Lin Lin, Robert Flaumenhaft, Chris Dockendorff

Chemistry Faculty Research and Publications

The enzyme protein disulfide isomerase (PDI) is essential for the correct folding of proteins and the activation of certain cell surface receptors, and is a promising target for the treatment of cancer and thrombotic conditions. A previous high-throughput screen identified the commercial compound STK076545 as a promising PDI inhibitor. To confirm its activity and support further biological studies, a resynthesis was pursued of the reported β-keto-amide with an N-alkylated pyridone at the α-position. Numerous conventional approaches were complicated by undesired fragmentations or rearrangements. However, a successful 5-step synthetic route was achieved using an aldol reaction with an α-pyridone allyl …

Nonheme Iron–Thiolate Complexes As Structural Models Of Sulfoxide Synthase Active Sites, Danushka M. Ekanayake, Anne A. Fischer, Maya E. Elwood, Alexandra M. Guzek, Sergey V. Lindeman, Cordina V. Popescu, Adam T. Fiedler

Chemistry Faculty Research and Publications

Two mononuclear iron(II)–thiolate complexes have been prepared that represent structural models of the nonheme iron enzymes EgtB and OvoA, which catalyze the O₂-dependent formation of carbon–sulfur bonds in the biosynthesis of thiohistidine compounds. The series of Fe(II) complexes reported here feature tripodal N₄ chelates (L^A and L^B) that contain both pyridyl and imidazolyl donors (L^A = (1H-imidazol-4-yl)-N,N-bis((pyridin-2-yl)methyl)methanamine; L^B = N,N-bis((1-methylimidazol-2-yl)methyl)-2-pyridylmethylamine). Further coordination with monodentate aromatic or aliphatic thiolate ligands yielded the five-coordinate, high-spin Fe(II) complexes [Fe^II(L^A)(SMes)]BPh …

Adiabatic Trajectory Approximation Within The Framework Of Mixed Quantum/Classical Theory, Bikramaditya Mandal, Alexander Semenov, Dmitri Babikov

Chemistry Faculty Research and Publications

A hierarchy of approximate methods is proposed for solving the equations of motion within a framework of the mixed quantum/classical theory (MQCT) of inelastic molecular collisions. Of particular interest is a limiting case: the method in which the classical-like equations of motion for the translational degrees of freedom (scattering) are decoupled from the quantum-like equations for time evolution of the internal molecular states (rotational and vibrational). In practice, trajectories are pre-computed during the first step of calculations with driving forces determined solely by the potential energy surface of the entrance channel, which is an adiabatic trajectory approximation. Quantum state-to-state transition …

Multitarget Stool Dna Testing For The Prevention Of Colon Cancer: Outcomes In A Large Integrated Healthcare System, Nimish Vakil, Kristin Ciezki, Nadia Huq, Maharaj Singh

School of Dentistry Faculty Research and Publications

Background and Aims

Multitarget stool DNA (MT-sDNA) testing is used in primary care as a screening test for colon cancer. Test effectiveness and patient compliance were examined in clinical practice.

Methods

We assessed outcomes of MT-sDNA testing in a cohort study conducted in a large integrated healthcare system comprising 15 hospitals and 150 outpatient clinics using advanced electronic data capture (Clarity2 [Epic, Verona, Wisc, USA] and REDCap [Encinitas, Calif, USA]) followed by manual chart review to confirm MT-sDNA test results and to monitor the outcomes of subsequent colonoscopy.

Results

A total of 6835 MT-sDNA tests were performed over 1 year …

Dynamic Evolution And Reversibility Of Single-Atom Ni(Ii) Active Site In 1t-Mos2 Electrocatalysts For Hydrogen Evolution, Brian Pattengale, Yichao Huang, Xingxu Yan, Sizhou Yang, Sabrina Younan, Wenhui Hu, Zhida Li, Sungsik Lee, Xiaoping Pan, Jing Gu, Jier Huang

Chemistry Faculty Research and Publications

1T-MoS₂ and single-atom modified analogues represent a highly promising class of low-cost catalysts for hydrogen evolution reaction (HER). However, the role of single atoms, either as active species or promoters, remains vague despite its essentiality toward more efficient HER. In this work, we report the unambiguous identification of Ni single atom as key active sites in the basal plane of 1T-MoS₂ (Ni@1T-MoS₂) that result in efficient HER performance. The intermediate structure of this Ni active site under catalytic conditions was captured by in situ X-ray absorption spectroscopy, where a reversible metallic Ni species (Ni⁰) …

The Protective Roles Of Latinx Intercultural Competence And Acculturation On Acculturative Stress And Depression: A Brief Longitudinal Study, Mark W. Driscoll, Lucas Torres

Psychology Faculty Research and Publications

This study examined the ability of cognitive schemas of culturally based skills, or Latinx intercultural competence (LIC), and acculturation to influence later acculturative stress and depression symptom severity. Latinx adults (final n 98), recruited from national e-mail listings and organizations with a predominant Latinx cultural base, completed online self-report measures of Latinx and Anglo acculturation, acculturative stress, LIC, and depression symptom severity at baseline (T1) and 6-month follow-up (T2). Path analysis indicated that T1 LIC was significantly related to greater T1 Latinx and T1 Anglo acculturation, and that T1 LIC was significantly, indirectly related to lower T2 acculturative stress through …