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Portland State University

Theses/Dissertations

2010

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Climate Change, Its Effect On Migration Patterns Of The Cackling Goose And White-Fronted Goose In The Willamette Valley, And Implications For Goose Management, Kelly Warren Jul 2010

Climate Change, Its Effect On Migration Patterns Of The Cackling Goose And White-Fronted Goose In The Willamette Valley, And Implications For Goose Management, Kelly Warren

Environmental Science and Management Professional Master's Project Reports

This thesis considers the question of whether climate change is affecting the migration patterns of geese in the Pacific Flyway, specifically cackling geese (Branta hutchinsii minima) and Pacific white-fronted geese (Anser albifrons frontalis). Ancillary questions that are considered are as follows:

• If global warming is affecting these species, what is the nature of the effects?

• How are the changes affecting the human environment and what can be done about these effects?

In 1994, the majority of the cackler population in the Pacific Flyway began to winter in Oregon's Willamette Valley rather than in their …


Beyul Khumbu: Sherpa Constructions Of A Sacred Landscape, Lindsay Ann Skog Jun 2010

Beyul Khumbu: Sherpa Constructions Of A Sacred Landscape, Lindsay Ann Skog

Dissertations and Theses

Khumbu, part of Sagarmatha (Mt. Everest) National Park in eastern Nepal and an UNESCO World Heritage site, is home to the Sherpa people, ethnic Tibetan Buddhists who migrated to the region more than 500 years ago. Sherpas animate the landscape with localized water, tree, rock, and land spirits, identify sacred mountains, mainly associated with the Bönpo and Tibetan yullha traditions, and some view the landscape as a beyul, a sacred place and hidden valley protecting Buddhist people and beliefs in times of turmoil and need. These beliefs protect the natural environment through religious practices and taboos against environmentally harmful …


Innovation, Markets, And Evolution, Mitch Green Jun 2010

Innovation, Markets, And Evolution, Mitch Green

Economics Undergraduate Honors Theses

This paper approaches innovation from an evolutionary perspective. Literature spanning a broad range of traditions in economics is considered, to include Institutionalist, Schumpeterian, post-Keynesian, and growth theorists. Key systemic changes are examined in the context of prevailing technological and social institutions. It is argued that expectation-fixing effects such as path-dependence in investment and innovation provide structure to a social network of market institutions that seek to validate money contracts. The institution of money is considered as a center of power in the system and affects the course of innovation. Money as the unit of account becomes the object of …


Financial Illiteracy: Prevalence, Consequences, And Solutions, Gerald Matasy Jun 2010

Financial Illiteracy: Prevalence, Consequences, And Solutions, Gerald Matasy

Economics Undergraduate Honors Theses

As Americans have become increasingly responsible for their own financial security their ability to make financial decisions in their best interests has certainly grown in importance. The focus of this paper is to determine what role financial literacy plays in making optimal financial decisions and maintaining economic stability. Using mostly research from other studies and some original research, this paper seeks to examine the level of financial literacy among the general population and what the implications are for the general lack of literacy. What I find is that individuals who have lower levels of financial literacy generally make poorer financial …


Thirlwall's Law And Krugman's 45-Degree Rule: Mathematically Identical, Mutually Exclusive, Karl Garbacik Jun 2010

Thirlwall's Law And Krugman's 45-Degree Rule: Mathematically Identical, Mutually Exclusive, Karl Garbacik

Economics Undergraduate Honors Theses

Thirlwall's Law and the 45-degree rule, originally formulated by Krugman, are radically different interpretations of the same statistical regularity. This statistical regularity is that a country's long-run growth rate will approximate to the ratio of that country's export growth to its import elasticity of demand. Thirlwall's Law falls under a Post-Keynesian framework which is primarily a demand-side model. The 45-degree rule relies on a supply-side interpretation, a result of its neoclassical origins. This thesis seeks to answer two questions. The first is, are the members of the Post-Keynesian and neoclassical communities working on each of these theories aware of the …


Outcomes Of A One-Week Teaching Training In Community-Based Ecological Research, Kara Gonsler Jun 2010

Outcomes Of A One-Week Teaching Training In Community-Based Ecological Research, Kara Gonsler

Environmental Science and Management Professional Master's Project Reports

The goal of this project was to expand on potential audiences and partnerships within the Teaching Ecological Complexity Project, by creating a one-week teacher training workshop in collaboration with a local natural resource management partner. The training sought to increase teachers’ understanding of ecology and qualitative conceptual models through immersion in field research and partnerships with local scientists and natural resource managers. Ecological knowledge was measured by comparing pre and post qualitative conceptual models, which were scored with a rubric and analyzed using the Wilcoxon Signed Ranks Test. Classroom implementation of an inquiry-based ecological research project was expected of participants. …


Examining The Effects Of Climate Change And Urban Development On Water Demand: A Multi-Scale Analysis Of Future Water Demand In Hillsboro, Oregon, Lily Arielle House-Peters May 2010

Examining The Effects Of Climate Change And Urban Development On Water Demand: A Multi-Scale Analysis Of Future Water Demand In Hillsboro, Oregon, Lily Arielle House-Peters

Dissertations and Theses

In the Portland, Oregon, metropolitan area, suburban cities such as Hillsboro are projected to grow as people seek affordable housing near a rapidly growing metropolis. This thesis examines the combined impact of climate change and urban development on both neighborhood and municipal scale residential water demand in Hillsboro, Oregon. I use two models, a surface energy balance model, Local-scale Urban Meteorological Parameterization Scheme (LUMPS), and a system dynamics model, CCDomestic, to investigate changes in residential water demand in the 2040s at two distinct spatial scales, the neighborhood and the municipality. I calibrate and validate each model to the reference period …


On Family And Fences: Tracing Melungeon Roots In The Blue Ridge Mountains Of Virginia And Tennessee, Ron Horton May 2010

On Family And Fences: Tracing Melungeon Roots In The Blue Ridge Mountains Of Virginia And Tennessee, Ron Horton

Dissertations and Theses

The Melungeons are a group of indeterminable origin living in the Blue Ridge Mountains of Southeastern Tennessee and Southwestern Virginia. This thesis describes characteristics of these tri-racial isolates and gives theories as to their mysterious origins. Being darker skinned, the Melungeons were pushed into more mountainous regions by European colonists in the early 1700’s. While multiple hypotheses exist as to the origin of the Melungeon people, there is no single theory that is accepted by all scholars.

Dr. Brent Kennedy’s The Melungeons: The Resurrection of a Proud People, served as a catalyst for my Melungeon research. Kennedy is my …


"Heaven's Last, Worst Gift To White Men": The Quadroons Of Antebellum New Orleans, Erin Elizabeth Mccullugh Apr 2010

"Heaven's Last, Worst Gift To White Men": The Quadroons Of Antebellum New Orleans, Erin Elizabeth Mccullugh

Dissertations and Theses

Visitors to Antebellum New Orleans rarely failed to comment on the highly visible population of free persons of color, particularly the women. Light, but not white, the women who collectively became known as Quadroons enjoyed a degree of affluence and liberty largely unknown outside of Southeastern Louisiana. The Quadroons of New Orleans, however, suffered from neglect and misrepresentation in nineteenth and twentieth-century accounts.

Historians of slavery and southern black women, for example, have written at length on the sexual experiences of black women and white men. Most of the research, however, centers on the institutionalized rape, victimization, and exploitation of …


Exploring Mitigation Options To Reduce Vehicle-Caused Mortality For The Oregon Silverspot Butterfly, Speyeria Zerene Hippolyta, Along Highway 101 At The Siuslaw National Forest, Sara B. Zielin Apr 2010

Exploring Mitigation Options To Reduce Vehicle-Caused Mortality For The Oregon Silverspot Butterfly, Speyeria Zerene Hippolyta, Along Highway 101 At The Siuslaw National Forest, Sara B. Zielin

Environmental Science and Management Professional Master's Project Reports

The Oregon Silverspot Butterfly (OSB), Speyeria zerene hippolyta, is federally listed as "threatened." It historically inhabited coastal regions of Washington, Oregon, and California (USFWS 2001). OSB populations only remain at five sites, four of which are in Oregon; one remaining population is in California, and none exist in Washington state as they have been extirpated (BFCI 2009; USFWS 2001). The site selected for this study was Rock Creek-Big Creek, adjacent to the Siuslaw National Forest. At this site OSB habitat is bisected by Highway 101; butterflies are observed to use both sides of the highway throughout their life cycle. …


Biogeography Of The American Pika (Ochotona Princeps) In Oregon And Southern Washington: Illuminating Genetic Relationships Among Disjunct Populations, George Washington Batten Iii Feb 2010

Biogeography Of The American Pika (Ochotona Princeps) In Oregon And Southern Washington: Illuminating Genetic Relationships Among Disjunct Populations, George Washington Batten Iii

Dissertations and Theses

The American pika (Ochotona princeps) finds moderately warm temperatures (>25°C) lethally stressful, and at the end of the last Ice Age 10,000 years ago was forced to disperse to cooler, "sky island" mountaintops where they are almost exclusively found today. Thirty six subspecies are recognized, all established using morphological characters, and it is uncertain whether these subspecies' designations are corroborated by genetic analyses. This study elucidates three hypotheses regarding populations in Oregon and southern Washington: 1) O. p. fumosa constitutes a subspecies distinct form O. p. brunnescens, 2) the Columbia River constitutes a barrier to gene …


Sour Grapes While You're Down And Out: Self-Serving Bias And Applicant Attributions For Test Performance, Kyle Garret Mack Feb 2010

Sour Grapes While You're Down And Out: Self-Serving Bias And Applicant Attributions For Test Performance, Kyle Garret Mack

Dissertations and Theses

Recent research has shown that outcome favorability (Ryan & Ployhart, 2000) and perceived performance (Chan, Schmitt, Jennings, Clause, & Delbridge, 1998a) are key determinates of justice judgments, suggesting that self-serving bias is a critical mechanism in the formation of applicant reactions. However, organizational justice theory continues to be the dominant paradigm for understanding applicant reactions. Chan and Schmitt (2004) have suggested a far ranging agenda for research into reactions, which includes considering reactions in a longitudinal framework and considering the natural effect of time on reactions. The current study incorporates these theoretical approaches and addresses these gaps in the research …


Influence Of Wetland Landscape Structure On Duck Nest Success At Malheur National Wildlife Refuge, Oregon, Daniel Robert Craver Jan 2010

Influence Of Wetland Landscape Structure On Duck Nest Success At Malheur National Wildlife Refuge, Oregon, Daniel Robert Craver

Geography Masters Research Papers

The decline of waterfowl populations and their requisite wetland habitats remains a concern. Because migratory bird refuges are often artificial landscapes of actively managed wetlands, and wildlife populations experience their greatest change during the breeding season, refuges should be designed to maximize breeding habitat. While past nest success studies have focused on at-nest variables, new approaches are needed to evaluate the effect of composition and configuration of plant communities at the landscape scale. This study aims to quantify landscape patterns within individual refuge management units to determine influence upon historical nesting success averages of ducks at Malheur National Wildlife Refuge …


Women And Resistance In The African Diaspora, With Special Focus On The Caribbean (Trinidad And Tobago) And U.S.A., Clare Johnson Washington Jan 2010

Women And Resistance In The African Diaspora, With Special Focus On The Caribbean (Trinidad And Tobago) And U.S.A., Clare Johnson Washington

Dissertations and Theses

American history has celebrated the involvement of black women in the "underground railroad," but little is said about women's everyday resistance to the institutional constraints and abuses of slavery. Many Americans have probably heard of and know about Harriet Tubman and Sojourner Truth -- two very prominent black female resistance leaders and abolitionists -- but this thesis addresses the lives of some of the less-celebrated and lesser-known (more obscure) women; part of the focus is on the common tasks, relationships, burdens, and leadership roles of these very brave enslaved women.

Resistance history in the Caribbean and Americas in its various …


Characterization Of Mesoscopic Fluid-Like Films With The Novel Shear-Force/Acoustic Microscopy, Xiaohua Wang Jan 2010

Characterization Of Mesoscopic Fluid-Like Films With The Novel Shear-Force/Acoustic Microscopy, Xiaohua Wang

Dissertations and Theses

The shear force mechanism has been utilized as a distance regulation method in scanning probe microscopes. However, the origin of shear force is still unclear. One of the most important reasons for the shear-force damping is due to the presence of a water contamination layer at the sample surface in ambient conditions. Understanding the behavior of such mesoscopic fluid-like films is of significance for studies of not only scanning probe microscopy but also other complex surface phenomena, such as nanotribology, lubrication, adhesion, wetting, and the microfluidity of biological membranes. This thesis investigates, in particular, the dynamics of mesoscopic fluids confined …


Public Opinion And Public Engagement With Genetically Modified Foods : A Qualitative Study, Celeste Laurana Moser Jan 2010

Public Opinion And Public Engagement With Genetically Modified Foods : A Qualitative Study, Celeste Laurana Moser

Dissertations and Theses

The purpose of the current study was to understand public opinion formation by determining what factors influence opinion leaders in the organic food community to engage in the genetically modified food debate, and how opinion leaders describe American lay publics' engagement in the debate.


Expressive Motion Synthesis For Robot Actors In Robot Theatre, Mathias I. Sunardi Jan 2010

Expressive Motion Synthesis For Robot Actors In Robot Theatre, Mathias I. Sunardi

Dissertations and Theses

Lately, personal and entertainment robotics are becoming more and more common. In this thesis, the application of entertainment robots in the context of a Robot Theatre is studied. Specifically, the thesis focuses on the synthesis of expressive movements or animations for the robot performers (Robot Actors). The novel paradigm emerged from computer animation is to represent the motion data as a set of signals. Thus, preprogrammed motion data can be quickly modified using common signal processing techniques such as multiresolution filtering and spectral analysis. However, manual adjustments of the filtering and spectral methods parameters, and good artistic skills are still …


Polyaniline Nanofibers As The Hole Transport Medium In An Inverse Dye-Sensitized Solar Cell, Ian Brock Hesselsweet Jan 2010

Polyaniline Nanofibers As The Hole Transport Medium In An Inverse Dye-Sensitized Solar Cell, Ian Brock Hesselsweet

Dissertations and Theses

In order to become a viable alternative to silicon photovoltaics, dye-sensitized solar cells must overcome several issues primarily resulting from their use of a liquid electrolyte. Much research has gone into correcting these shortcomings by replacing the liquid electrolyte with solid-state hole-transport media. Using these solid-state materials brings new difficulties, such as completely filling the pores in the TiO₂ nanostructure, and achieving good adhesion with the dye-coated TiO₂. A novel approach to addressing these difficulties is the inverse dye-sensitized solar cell design. In this method the devices are constructed in reverse order, with the solid-state hole-transport medium providing the nanostructure …


Efficient Encoding Of Vocalizations In The Auditory Midbrain, Lars Andreas Holmstrom Jan 2010

Efficient Encoding Of Vocalizations In The Auditory Midbrain, Lars Andreas Holmstrom

Dissertations and Theses

An important question in sensory neuroscience is what coding strategies and mechanisms are used by the brain to detect and discriminate among behaviorally relevant stimuli. To address the noisy response properties of individual neurons, sensory systems often utilize broadly tuned neurons with overlapping receptive fields at the system's periphery, resulting in homogeneous responses among neighboring populations of neurons. It has been hypothesized that progressive response heterogeneity in ascending sensory pathways is evidence of an efficient encoding strategy that minimizes the redundancy of the peripheral neural code and maximizes information throughput for higher level processing. This hypothesis has been partly supported …


Parental Differential Treatment (Pdt) Of Siblings: Examining The Impact And Malleability Of Differential Warmth And Hostility On Children's Adjustment, Brianne H. Kothari Jan 2010

Parental Differential Treatment (Pdt) Of Siblings: Examining The Impact And Malleability Of Differential Warmth And Hostility On Children's Adjustment, Brianne H. Kothari

Dissertations and Theses

Parental differential treatment (PDT), the within-family differences in parenting experienced by siblings (Rivers & Stoneman, 2008), has been linked to detrimental adjustment outcomes for children (e.g., Conger & Conger, 1994). The primary goal of this research was to more closely examine how differential treatment in two domains of parent-child relations-displays of warmth and hostility- were associated with child outcomes. A secondary data analysis was conducted on a Randomized Controlled Trial (RCT) of a parent training intervention. Participants in this sample were high risk children and families, and they were randomly assigned to one of three groups: an intensive parent training …


Performance Measures For Managerial Decision Making: Performance Measurement Synergies In Multi-Attribute Performance Measurement Systems, Robert Andrew Fowke Jan 2010

Performance Measures For Managerial Decision Making: Performance Measurement Synergies In Multi-Attribute Performance Measurement Systems, Robert Andrew Fowke

Dissertations and Theses

This research tests for correlation between corporate performance and use of financial measures, nonfinancial measures, and number of balanced scorecard categories used. Literature notes a preference for managing by nonfinancial measures because financial measures are lagging indicators, but little empirical evidence is available on the relationship between nonfinancial measures and financial performance, and few companies are found to realize the benefits of nonfinancial measurements. The balanced scorecard has been studied to find the impact of diversity of performance measures, and anecdotal improvements have been reported, but there is a paucity of empirical evidence regarding how the use of a balanced …


Predictors Of Family-Supportive Supervisor Behaviors: Supervisor Job Stress And Work-Family Climate, Brittany E. Sale Jan 2010

Predictors Of Family-Supportive Supervisor Behaviors: Supervisor Job Stress And Work-Family Climate, Brittany E. Sale

Dissertations and Theses

Research indicates that supportive supervision, particularly work-family specific supervision, is key to reducing employees' work-family conflict (Allen, 2001; Eby et al., 2005; Thomas & Ganster, 1995). However, little research has examined the factors that contribute to supervisors' willingness or ability to provide this support. This study examined how supervisor job stress and perceptions of work-family climate influenced employee ratings of Family-Supportive Supervisor Behaviors (FSSB) using previously-collected data from a mid-western grocery chain. It was hypothesized that supervisor job stressors would impact FSSB, supervisor perception of work-family climate would impact FSSB, and the interaction of stressors and climate would impact FSSB. …


The Development Of Embedded Dram Statistical Quality Models At Test And Use Conditions, Satoshi Suzuki Jan 2010

The Development Of Embedded Dram Statistical Quality Models At Test And Use Conditions, Satoshi Suzuki

Dissertations and Theses

Today, the use of embedded Dynamic Random Access Memory (eDRAM) is increasing in our electronics that require large memories, such as gaming consoles and computer network routers. Unlike external DRAMs, eDRAMs are embedded inside ASICs for faster read and write operations. Until recently, eDRAMs required high manufacturing cost. Present process technology developments enabled the manufacturing of eDRAM at competitive costs. Unlike SRAM, eDRAM exhibits retention time bit fails from defects and capacitor leakage current. This retention time fail causes memory bits to lose stored values before refresh. Also, a small portion of the memory bits are known to fail at …


Achieving Congruence: Building A Case For Implementing A District-Wide Interim Benchmark Assessment That Is Aligned With A Balanced Literacy Framework, Theodore Feller Jan 2010

Achieving Congruence: Building A Case For Implementing A District-Wide Interim Benchmark Assessment That Is Aligned With A Balanced Literacy Framework, Theodore Feller

Dissertations and Theses

For generations--and certainly for the last 30 years--proponents of traditional and progressive philosophies have argued over how best to educate our children. Although this debate is often carried out in the political and academic spheres, the difficulties created by not being able to resolve the differences between the two belief systems become blatantly clear in the pedagogy of early literacy. On the one hand, traditionalists argue for a direct and explicit instructional methodology, and on the other hand, progressives advocate for Whole Language or Balanced Literacy instruction. The classroom often becomes a battlefield as advocates of these opposing schooling paradigms …


Comparison Of Microshear Bond Strength And Morphological Changes Between Active And Passive Application Of 4th Generation Etch-And-Rinse Etchant On Enamel, Sophia Tuyet-Nhi Trieu Jan 2010

Comparison Of Microshear Bond Strength And Morphological Changes Between Active And Passive Application Of 4th Generation Etch-And-Rinse Etchant On Enamel, Sophia Tuyet-Nhi Trieu

Dissertations and Theses

Over 200 million dental restorations are performed each year in America. A dental restoration require a strong bonding of restoration to tooth structure and relies on the dental adhesive to create this mechanical and chemical bonding. Dental adhesion or bonding is the process of forming an adhesive joint between the composite and tooth substrate: dentin or enamel. Clinical problems such as microleakage at the restoration tooth interface, influx of fluids, or bacteria growth at the cavity wall can be prevented with adhesives that obtain a more intimate bonding. Longevity of the restoration can be enhanced by the adhesive that creates …


Child Welfare Workforce Turnover: Frontline Workers' Experiences With Organizational Culture And Climate, And Implications For Organizational Practice, Melanie Dawn Sage Jan 2010

Child Welfare Workforce Turnover: Frontline Workers' Experiences With Organizational Culture And Climate, And Implications For Organizational Practice, Melanie Dawn Sage

Dissertations and Theses

Public child welfare agencies experience front line worker turnover rates as high as 25% a year. Worker turnover has significant financial costs to agencies, and has been linked to negative outcomes for children in care. Prior research has linked organizational factors, such as organizational climate, culture, and supervisor satisfaction, to turnover intent in child welfare populations. This research uses an empowerment framework to turn to workers directly to answer the question, "What are the organizational factors that lead frontline child welfare workers to stay or leave the agency, and what, then, are the implications for agency administrators?" This study relies …


Simplified Reversed Chloroquines To Overcome Malaria Resistance To Quinoline-Based Drugs, Bornface Gunsaru Jan 2010

Simplified Reversed Chloroquines To Overcome Malaria Resistance To Quinoline-Based Drugs, Bornface Gunsaru

Dissertations and Theses

Malaria is a major health problem, mainly in developing countries, and causes an estimated 1 million deaths per year. Plasmodium falciparum is the major type of human malaria parasite, and causes the most infections and deaths. Malaria drugs, like any other drugs, suffer from possible side effects and the potential for emergence of resistance. Chloroquine, which was a very effective drug, has been used since about 1945, but its use is severely limited by resistance, even though it has mild side effects, and is otherwise very efficacious. Research has shown that there are chloroquine reversal agents, molecules that can reinstate …


Rashomon Comes To The Courtroom: The Adoption Of The Lay Judge System In Japan, Its Impact On Jurisprudence, And The Implications For Civic Engagement, Bryan Matthew Thompson Jan 2010

Rashomon Comes To The Courtroom: The Adoption Of The Lay Judge System In Japan, Its Impact On Jurisprudence, And The Implications For Civic Engagement, Bryan Matthew Thompson

Dissertations and Theses

In May of 2009, Japan began formal operations of the "saiban-in seido" or "lay judge system," a quasi-jury means of criminal trial adjudication that represents the first occasion since 1943 that average Japanese citizens will be required to fulfill a role in the criminal jurisprudential process. While the lay judge system promises to affect the methods and procedures of criminal trials in Japan, recent scholarship in the United States has raised an interesting question: to what degree can the lay participatory adjudication process facilitate greater levels of civic engagement in past citizen jurists once their service has completed?

It …


La Palabra Es Salud: A Comparative Study Of The Effectiveness Of Popular Education Vs. Traditional Education For Enhancing Health Knowledge And Skills And Increasing Empowerment Among Parish-Based Community Health Workers (Chws), Noelle Wiggins Jan 2010

La Palabra Es Salud: A Comparative Study Of The Effectiveness Of Popular Education Vs. Traditional Education For Enhancing Health Knowledge And Skills And Increasing Empowerment Among Parish-Based Community Health Workers (Chws), Noelle Wiggins

Dissertations and Theses

Popular education is a mode of teaching and learning which seeks to bring about more equitable social conditions by creating settings in which people can identify and solve their own problems. While the public health literature offers evidence to suggest that popular education is an effective strategy for increasing empowerment and improving health, there have been no systematic attempts to compare the outcomes of popular education to those of traditional education. The goal of La Palabra es Salud was to conduct such a comparison among Latino, parish-based Community Health Workers (CHWs). The study employed a quasi-experimental design, mixed methods, and …


Modeling The Role Of Operational Characteristics In Safety Performance Of Publictransportation Systems: The Case Of Trimet Bus Collision And Non-Collision Incidents., Paul Herman Wachana Jan 2010

Modeling The Role Of Operational Characteristics In Safety Performance Of Publictransportation Systems: The Case Of Trimet Bus Collision And Non-Collision Incidents., Paul Herman Wachana

Dissertations and Theses

The incidence of bus crashes in the US have been trending upwards, with accident, injury and fatality rates increasing 171%, 37.8%, and 5.1% respectively, between 2003 and 2007. Reversing the upward trend is an important objective of both transit providers and the society in general. This study introduces an operator-based safety methodology that utilizes data recovered from transit Intelligent Transportation Systems (ITS) technologies and related systems to identify and assess factors contributing to bus operations safety incidents at TriMet, the transit provider for the Portland, Oregon metropolitan region. The analysis specifically focuses on collision, non-collision and total incidents, as well …