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Survival Times And Investment Analysis With Dynamic Learning, Zhenzhen Li

Dissertations and Theses

The central statistical problem of survival analysis is to determine and characterize the conditional distribution of a survival time given a history of some observed health markers.

This dissertation contributes to the modeling of such conditional distributions in a setup where the health markers evolve randomly over time in a manner that can be represented by an Ito stochastic process, that is, a stochastic process that can be written as a sum of a time integral of some stochastic process and an Ito integral of some stochastic process, with both integrands subject to certain restrictions.

The random survival time is …

Faculty Senate Monthly Packet June 2023, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The June 5, 2023 monthly packet includes the June agenda, appendices, and the Faculty Senate minutes and attachments from the meetings held June 5 and 12, 2023.

Paperwork, Paradox, And Prn: Psychotropic Medication Deficiencies In Assisted Living, Sarah Dys, Paula Carder

Institute on Aging Publications

Individual state approaches to assisted living/residential care (AL/RC) licensing and oversight in the United States result in different practice standards and requirements, including psychotropic medication use. We examined 170 psychotropic medication deficiency citations issued to 152 Oregon AL/RC settings from 2015 to 2019. Applied thematic analysis resulted in the following themes: (1) documentation issues are primarily responsible for noncompliance, (2) unclear parameters place direct care workers in a role paradox, and (3) there is a persistent disconnect about when to seek qualified expertise before requesting psychotropic medications. AL/RC-specific mechanisms for medication prescription and administration are necessary to improve the structure …

Gas Metal Arc Welding With Undermatched Filler Wire For Hot-Press-Formed Steel Of 2.0 Gpa Strength: Influence Of Filler Wire Strength And Bead Geometry, Dong-Yoon Kim, Cheolhee Kim, Tae Hyen Lee, Minjung Kang, Junhong Park

Mechanical and Materials Engineering Faculty Publications and Presentations

Commercial welding filler wires have less strength than hot-press-forming (HPF) steels. As the 2.0 GPa-HPF steel sheets have been released, their lap welding characteristics were investigated using gas metal arc welding in this study. The base metal was 1.1 mm-thick 2.0 GPa-HPF steel sheets, and three filler metal wires considered in this study (W540, W920, and W980) had tensile strengths of 540, 920, and 980 MPa, respectively. Gas metal arc welding was performed under a controlled short-circuit mode, and the wire feed speed (WFS) was selected as a process parameter. Tensile-shear test and microscopy were performed to evaluate the joint …

The Pacific Sentinel, June 2023, Portland State University. Student Publications Board

The Pacific Sentinel

Editor: Dan Chilton

Articles in this issue include:

• Letter From the Editor
• Android Flowers of the Future
• Gary Numan Tours North America
• Emily King, the Queen of Hearts
• Who Protects Us?
• The Landing to Close Its Doors
• The First (& Forgotten) 'R'
• Celebrate the Legacy, Ignore the History
• Donuts & Dao's
• About Town
• What We're Enjoying

Residual Vulnerabilities To Power Side Channel Attacks Of Lightweight Ciphers Cryptography Competition Finalists, Aurelien Mozipo, John M. Acken

Electrical and Computer Engineering Faculty Publications and Presentations

The protection of communications between Internet of Things (IoT) devices is of great concern because the information exchanged contains vital sensitive data. Malicious agents seek to exploit those data to extract secret information about the owners or the system. Power side channel attacks are of great concern on these devices because their power consumption unintentionally leaks information correlatable to the device's secret data. Several studies have demonstrated the effectiveness of authenticated encryption with advanced data, in protecting communications with these devices. A comprehensive evaluation of the seven (out of 10) algorithm finalists of the National Institute of Standards and Technology …

Evaluation Of The Alternatives Of Introducing Electric Vehicles In Developing Countries Using Type-2 Neutrosophic Numbers Based Rafsi Model, Ilgin Gokasar, Muhammet Deveci, Mehtap Isik, Tugrul Daim, Aws A. Zaidan, Florentin Smarandache

Engineering and Technology Management Faculty Publications and Presentations

This study focuses on implementing electric vehicles (EVs) in developing countries where energy production is mainly based on fossil fuels. Although for these countries the environmental short-run benefits of the EVs cannot offset the short-run costs, it may still be the best option to implement the EVs as soon as possible. Hence, it is necessary to evaluate the alternatives to introducing EVs to the market due to the environmental concerns that created an opportunity for some developing countries to catch up with the international competition. Therefore, we develop a case scenario to explore the decision-making process in implementing the EVs …

An Examination Of The Stiffness Terms Needed To Model The Dynamics Of An Eddy Current Based Maglev Vehicle, Colton W. Bruce, Jonathan Bird

Electrical and Computer Engineering Faculty Publications and Presentations

This paper re-examines the basis for each eddy current stiffness term computed from prior published steady-state eddy current models. The paper corrects prior analysis work by confirming, through the use of 2-D and 3-D dynamic finite element analysis modelling, that when a magnetic source is moving over an infinite-wide and infinite-long conductive sheet guideway the steady-state lateral and translational stiffness terms will be zero and only the vertical coupled stiffness terms need to be modelled. Using these observations, a much simplified 6 degrees-of-freedom (DoF) linearized eddy current dynamic force model can be used to compute the steady-state force changes in …

Data From: Shallow-Water Habitat In The Lower Columbia River Estuary: A Highly Altered System, Will Templeton, David Jay, Heida Diefenderfer, S. A. Talke

Civil and Environmental Engineering Faculty Datasets

This is the dataset to accompany the article, Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System [Data set], accepted for publication in Estuaries and Coasts.

OVERVIEW OF THE SUPPLEMENTAL DATA FILES:

The files include water level data for 26 locations across varying time frames, as described below, and Columbia and Willamette River discharge measurements and estimates for observed, naturalized, and adjusted flows.

All water levels:

1. All water levels are reported as six-minute interpolated water level records derived from measured water levels. 2. The first column is date-time with date and time separated by a …

Evaluation Of Metaverse Traffic Safety Implementations Using Fuzzy Einstein Based Logarithmic Methodology Of Additive Weights And Topsis Method, Muhammet Deveci, Dragan Pamucar, Ilgin Gokasar, Mario Köppen, Brij B. Gupta, Tugrul Daim

Engineering and Technology Management Faculty Publications and Presentations

As the Metaverse’s popularity grows, its effect on everyday problems is beginning to be discussed. The upcoming Metaverse world will influence the transportation system as cross-border lines blur due to rapid globalization. The purpose of this paper is to investigate the capabilities of the Metaverse and its alternatives to traffic safety, as well as to prioritize its advantages. The case study is based on a densely populated metropolis with an extensive education system. The city’s decision-makers will have to weigh the pros and cons of the Metaverse’s effect on traffic safety. To illustrate the complex forces that drive the decision-making …

The Role Of The Armed Forces Of The Philippines (Afp) In Disaster Response And Adaptation Strategies To Climatic Disasters In Manila, Edmundo Nicolas Jr.

Geography Masters Research Papers

This study described the roles of the Armed Forces of the Philippines (AFP) in Disaster Risk Reduction Management (DRRM) in Metro Manila and how climate-induced hazards impact the role of the military. It used a qualitative approach, which involved semi- structured interviews among AFP officers and barangay leaders with expertise and experience in DRRM and an analysis of selected policy documents and military doctrine. These methods revealed that: (1) the military acts as a political first-aid, since they are the first responders – thus, the face of the local government – in climactic disasters during peacetime; (2) the military is …

Neural Correlates Of Comorbidity Of Anxiety Disorders And Eating Disorders, Karsen Coelho

University Honors Theses

The presence of eating disorder and anxiety disorder comorbidity has raised the question of whether or not there is a causal relationship between them. Previous studies have found that this comorbidity has been present in various patients with anxiety disorders and eating disorders, going further to try and determine which diagnosis came first. By conducting a literature review, studies were examined to determine neurobiological regions impacted by both disorders. Prefrontal cortex abnormalities are consistent among both disorders, contributing to differences in behavior and reward systems. With the irregular structure and activation of the amygdala, emotion and fear regulation are disrupted …

Flash-Rt: Using High-Dose Radiation For Clinical Radiation Therapy, Deja Stubbs

University Honors Theses

This paper is a literature review on the possible mechanisms behind the FLASH effect and why such research can advance the world of radiology treatment by modifying current clinical linear accelerators to produce ultra-high doses of radiation. Radiation Therapy, also known as external Beam Radiation Therapy, is a common type of cancer treatment. Globally, cancer is the second-leading cause of death, but has seen an increase in survival rates over the past couple of years. Cancer can develop in almost any part of the body since cancer is defined as uncontrolled cell growth. The FLASH Effect is seen when treating …

Indigenous Water Justice: Theory, Gaps, And Opportunities For Application, Ruby Howard

University Honors Theses

Indigenous people are particularly at risk of water scarcity in the U.S. and abroad, and face high rates of nonexistent or failing water infrastructure, water pollution, pipeline proposals that threaten water resources, and water-related climate change impacts. They also are often unequipped, politically and economically, to react and adapt to these impacts, resulting in devastating health impacts. Due to this widespread insecurity, many scholars are calling for the application of a theory and set of principles known as water justice. However, Indigenous people have pointed out that water justice literature does not focus enough on Indigenous issues, often neglecting the …

The Sanitary Lens: A Study Of 19th Century Public Health In British Colonial India And Australia, Josephine Cannistra

University Honors Theses

Specific colonial processes informed highly distinct policies of public health and sanitation in colonial India and Australia. Their distinctions and lasting legacies are obscured when they are uncritically lumped together within the British Empire. The 19th century was a period of great change throughout India and Australia. It was also a period of dramatic change in general understandings of sanitation and health. This paper examines colonial India and Australia through the lens of sanitation and medicine as it was understood and practiced in British spheres of influence. A comparative approach to these histories and this past sheds light on how …

Transportation Behavior Among Older Vietnamese Immigrants In The Dallas-Fort Worth Metroplex: Well-Being, Geospatial Mobility, And Potential Indicators For Ride Providers’ Geospatial Burden, Rebecca L. Mauldin, Stephen Mattingly, Mahshid Haque, John P. Connolly, Latisha Thomas, Zachary Tarbet, Farzana Chowdhury, Rupal Parekh

TREC Final Reports

Nearly 4.6 million immigrants aged 65 and older live in the United States. This population is expected to more than triple in size by 2050. A lack of culturally appropriate transportation solutions for older immigrants creates disparities in access to services for older immigrant populations, increasing their risk of social isolation and reduced physical and mental health. A growing number of older immigrants live in low-density urban environments, which are characterized by high automobile dependency and limited public transportation. In these environments, older immigrants are likely to depend on others to provide private transportation. Negative aspects of this reliance on …

Spheroidization Heat Treatment Conditions With Data Analysis In Medium Carbon Cr-Mo Steel For Ultra High Strength Cold Heading, Yong Deok Jo, Sung Yi, Byoung Lok Jang

Mechanical and Materials Engineering Faculty Publications and Presentations

The degree to which parameters affect the spheroidization heat treatment of steel was calculated by setting the spheroidization heat treatment conditions of Cr-Mo steel and using data analysis such as S/N ratio and ANOVA. After analyzing the transformation temperatures of the steel, A_c1 and A_c3, using a DSC, the conditions were set accordingly. The surface hardness was measured for the conditions and used as an evaluation index. The correlation was analyzed by comparing the spheroidized volume fraction and the surface hardness, and the Pearson correlation coefficient was -0.88, proving that a correlation existed between the two values. …

Repurposing Retail To Bring Downtown Back: A Recovery Plan For Portland's South Downtown, Jamie Arnau, Luis Caro, Matthew Flodin, Amy Ly, Thiery Nanetangar, Valeria Tapia

Master of Urban and Regional Planning Workshop Projects

The Revive Collaborative team is creating a plan to revitalize the South Downtown neighborhood and promote economic opportunity for local business owners. PSU’s vacant retail spaces present the opportunity to restructure and reimagine how these spaces might be used to uplift the neighborhood, capitalize on its existing strengths, and increase the district’s livability. Public engagement with business owners, stakeholders, students, and residents combined with current best practices have informed Revive Collaborative’s suite of recommendations for how PSU can help revitalize South Downtown from both a broad policy and granular program perspective.

NixyáAwii Watikš, Owen Christofferson, Sara Goldstein, Nick Hadfield, Zhuoheng (Brian) Liu, Jenny Mazzella, Victoria Young

Master of Urban and Regional Planning Workshop Projects

Nixyáawii Watikš is a proposed multi-use path connecting the City of Pendleton, Oregon, to Mission, a community hub containing tribal institutions and new mixed-use developments in the heart of the Umatilla Indian Reservation. In collaboration with the Tribal Planning Office of the Confederated Tribes of the Umatilla Indian Reservation (CTUIR), the student team conducted research and explored possible trail route options based on physical constraints, stakeholder interests, community priorities, and travel needs. This project aims to propose one recommended trail solution that improves accessibility, connectivity, transportation options, and safety for all trail users.

Prioritizing Land For Housing In Warrenton, Anis Boughanmi, James Dingwell, Maddy Knickerbocker, Jovan Merceron, Miranda Seekins, Amanda Ufheil-Sommers

Master of Urban and Regional Planning Workshop Projects

To address future housing needs, this project offers the City of Warrenton’s planning department tools to guide future housing planning and infrastructure investments. The team developed suitability analysis models to identify priority locations for future development based on environmental constraints, current infrastructure, community amenities, and emergency resilience. This process identified a more nuanced picture of developable land than the adopted analyses. The report provides recommendations to guide changes to comprehensive planning policies.

Impacts Of A Cascadia Subduction Zone Earthquake On Water Levels And Wetlands Of The Lower Columbia River And Estuary, M. W. Brand, Heida Diefenderfer, J. E. O’Connor, Amy B. Borde, D. A. Jay, Aqeel Al-Bahadily, M. Mckeon, S. A. Talke

Civil and Environmental Engineering Faculty Publications and Presentations

Subsidence after a subduction zone earthquake can cause major changes in estuarine bathymetry. Here, we quantify the impacts of earthquake-induced subsidence on hydrodynamics and habitat distributions in a major system, the lower Columbia River Estuary, using a hydrodynamic and habitat model. Model results indicate that coseismic subsidence increases tidal range, with the smallest changes at the coast and a maximum increase of ∼10% in a region of topographic convergence. All modeled scenarios reduce intertidal habitat by 24%–25% and shifts ∼93% of estuarine wetlands to lower-elevation habitat bands. Incorporating dynamic effects of tidal change from subsidence yields higher estimates of remaining …

Climate Change Policies And Older Adults: An Analysis Of States’ Climate Adaptation Plans, Bryant Carlson, Jacklyn N. Kohon, Paula Carder, Dani Himes, Eiji Toda, Katsuya Tanaka

Institute on Aging Publications

Background and Objectives

As climate change drives more frequent and intense weather events, older adults face disproportionate impacts, including having the highest mortality rates from storms, wildfires, flooding, and heat waves. State governments are critical in deploying local resources to help address climate change impacts. This policy study analyzes states’ climate adaptation plans to assess the methods through which they address the impact of climate change on older adults.

Research Design and Methods

This study uses content analysis to analyze available climate change adaptation plans for all U.S. states for strategies designed to increase resilience of older adults to impacts …

End-To-End Gpu Acceleration Of Low-Order-Refined Preconditioning For High-Order Finite Element Discretizations, Will Pazner, Tzanio Kolev, Jean-Sylvain Camier

Mathematics and Statistics Faculty Publications and Presentations

In this article, we present algorithms and implementations for the end-to-end GPU acceleration of matrix-free low-order-refined preconditioning of high-order finite element problems. The methods described here allow for the construction of effective preconditioners for high-order problems with optimal memory usage and computational complexity. The preconditioners are based on the construction of a spectrally equivalent low-order discretization on a refined mesh, which is then amenable to, for example, algebraic multigrid preconditioning. The constants of equivalence are independent of mesh size and polynomial degree. For vector finite element problems in H(curl) and H(div) (e.g., for electromagnetic or radiation diffusion problems), …

Umm Huwaiwitat: A Neolithic Site Near Petra, Jordan, Daniel Plekhov, Cristiano Nicosia, Luiza Osorio G. Silva, Sarah Newman, Felipe Rojas

Anthropology Faculty Publications and Presentations

Studies of the rural landscapes around the Nabataean/Roman city of Petra in Jordan have tended to assume a developmental trajectory based on that of the urban centre. Recent archaeological investigations at the site of Umm Huwaiwitat, however, shed light on the longer-term histories of human occupation and land use in the region north of Petra. Excavation has revealed Late Neolithic deposits formed by the burning of animal dung and the disposal of ash. These deposits underlie walls, today serving as agricultural terraces, which date to at least the Early Bronze Age. Umm Huwaiwitat therefore provides a microcosm of the long-lived …

Measurement Of Polycyclic Aromatic Hydrocarbons (Pahs) On Indoor Materials: Method Development, Aurélie Laguerre, Elliott T. Gall

Mechanical and Materials Engineering Faculty Publications and Presentations

Wildfire smoke penetrates indoors, and polycyclic aromatic hydrocarbons (PAHs) in smoke may accumulate on indoor materials. We developed two approaches for measuring PAHs on common indoor materials: (1) solvent-soaked wiping of solid materials (glass and drywall) and (2) direct extraction of porous/fleecy materials (mechanical air filter media and cotton sheets). Samples are extracted by sonication in dichloromethane and analyzed with gas chromatography–mass spectrometry. Extraction recoveries range from 50–83% for surrogate standards and for PAHs recovered from direct application to isopropanol-soaked wipes, in line with prior studies. We evaluate our methods with a total recovery metric, defined as the sampling and …

The Role Of High-Order Anharmonicity And Off-Diagonal Terms In Thermal Conductivity: A Case Study Of Multi-Phase Cspbbr3, Xiangdong Ding, Guimei Zhu, Yi Xia, Jie Ren, Jun Sun, Multiple Additional Authors

Mechanical and Materials Engineering Faculty Publications and Presentations

We investigate the influence of three- and four-phonon scattering, perturbative anharmonic phonon renormalization, and off-diagonal terms of coherent phonons on the thermal conductivity of CsPbBr3 phase change perovskite, by using advanced implementations and first-principles simulations. Our study spans a wide temperature range covering the entire structural spectrum. Notably, we demonstrate that the interactions between acoustic and optical phonons result in contrasting trends of phonon frequency shifts for the high-lying optical phonons in orthorhombic and cubic CsPbBr3 as temperature varies. Our findings highlight the significance of wavelike tunneling of coherent phonons in ultralow and glasslike thermal conductivity in halide perovskites.

Earthbound In The Anthropocene: Spirituality, Collective Identity, And Participation In The Direct Action Climate Movement, David Alan Osborn

Dissertations and Theses

Climate change, as part of a broader ecological crisis, is becoming an ever more potent event structuring human societies and planetary ecosystems. As the climate crisis deepens, climate change is unsettling core human identities, as well as the ontologies that define and situate concepts of "human" and "nature." And as social movements act to challenge and mitigate the catastrophes arising in the Anthropocene era, the question of how to sustain participation is critical. This dissertation explores these dynamics through a study of spirituality, collective identity, participation, and ontology in a subset of the climate movement. The research questions were: (1a) …

Player Character Conflict In Dungeons & Dragons 5e, Makenzie Kellar

University Honors Theses

Dungeons & Dragons (D&D) is a tabletop role-playing game (TTRPG) that has become increasingly popular in recent years due to cameos in shows such as Stranger Things, the success of actual play shows like Critical Role, and the release of the D&D movie Honor Among Thieves. D&D and other TTRPGs set themselves apart from other games by allowing for a massive amount of freedom both in character creation and in-game choices, both of which are a massive appeal for the player base. However, this also allows for conflict not only between the players, but also between the …

Electric Vehicle Charging Stations And Oregon Federal Lands: A Prospective Policy Analysis, Cole P. Grisham

Hatfield Graduate Journal of Public Affairs

In 2022, the Oregon Department of Transportation (ODOT) committed $100M towards expanding electric vehicle (EV) charging stations statewide. The policy goal is to provide EV fast-charging capacity[1] for four vehicles per station over the Interstate 5 and 84 corridors, along with the US 101, 97, 26, and 20 corridors. ODOT’s investment establishes clear statewide EV charging corridors for the traveling public, not only in the most populated corridors but also across the more rural parts of Oregon and connecting to neighboring states. In order for the travelling public to access public lands for recreation, economic, and other purposes by …

A Hierarchical Decision Model To Evaluate Healthcare Organization's Readiness To Implement Clinical Decision Support Systems, Mohammed Oussama Laraichi

Dissertations and Theses

Clinical Decision Support Systems (CDSS) are essential tools for healthcare organizations as well as for healthcare providers to improve clinical care. However, successful implementation of CDSS can be challenging. Therefore, before implementing CDSS, it is crucial to assess the readiness of healthcare organizations to implement these tools.

Through a literature review, the first step of this research explores the concept of clinical decision support and CDSS, discussing their features, characteristics, and organizational hurdles to implementation. It also provides perspectives on CDSS adoption in the context of Information Systems and Health Technology. The review helped identify research gaps, objectives, and questions. …