Social and Behavioral Sciences Commons^™

Experimental Investigations Of Wind Shear From Passing A Vehicle, Hamid Rahai, Assma Begum, Jeremy Bonifacio, Ryan Moffit

Mineta Transportation Institute

Wind energy can be harnessed for various commercial and transportation-related applications. This study assessed experimentally the potential of capturing wind energy from the passage of vehicles for electric power generation. Both wind tunnel experiments and field tests were performed. The wind tunnel experiments were performed in an open-circuit low-speed wind tunnel at a free-stream mean velocity of 23 m/s. Five PVC pipes placed adjacent to the wind-blowing domain were used to simulate the columns under a freeway overpass. A scaled Ahmad body (simplified car body model) was used as the vehicle. The spanwise distance between the Ahmad body and the …

Right Turn On Red: Energy-Saving Measure Or Unsafe Maneuver?, Bruce Appleyard, Anurag Pande, Joseph Gibbons, Shams Tanvir, Megan Honey, Nell Ahangarfabrik, Mario Carbajal, Madison Swayne

Mineta Transportation Institute

There is a growing interest in prohibiting right turn on red (RTOR) policies in the name of pedestrian and bicycle safety but there is not enough research on the subject to help agencies make informed decisions. When Congress passed the Energy Policy and Conservation Act of 1975, they included a provision requiring states to permit right turns on red lights as an energy-saving measure to receive federal assistance for mandated conservation programs. Since 1980, all states have permitted right turns on red as a general rule. More research is needed to help guide state policies that can support jurisdictions in …

An Assessment Of The Viva Callesj Event In San Jose, Richard Kos, Adam Cohen

Mineta Transportation Institute

This report evaluates the Viva CalleSJ event held in San Jose, California, on September 8, 2024. As a celebrated open-streets initiative, Viva CalleSJ temporarily transformed six miles of city streets into car-free zones to encourage active transportation, foster community engagement, and support local businesses. This assessment employed a mixed-methods approach, including participant surveys, interviews with stakeholders, and observational analysis. Key findings highlighted the event’s success in attracting a diverse audience, promoting physical activity, and driving economic benefits. Over 50% of attendees arrived by bicycle, and 77.7% planned to spend money at the event, averaging $54.23 per participant. Community-building impacts were …

Zero-Emission Buses In The Us: Understanding And Addressing Market And Policy Challenges, Leah Foecke, Zachary Karson, Thomas Tiberghien

Mineta Transportation Institute

As the US public transportation sector accelerates its shift from fossil fuels to zero-emission alternatives, transit agencies and transit bus manufacturers alike face significant uncertainty and instability. This report provides policymakers with updated insights into the US transit bus market, focusing on key industry dynamics, financial challenges with zero-emission bus (ZEB) acquisition, technological obstacles in deployment, and regulatory issues. The research relies on interviews with stakeholders, a detailed review of existing literature, and an analysis of US public transit data. Key findings reveal ongoing challenges related to costs, supply, reliability, and workforce development, all of which hinder the adoption of …

Creatine And Depression In Rodents: A Meta-Analysis, Ruchika S. Tirupachur

Master's Theses

Traditional treatments for major depression are based on the monoamine deficiency hypothesis, and they fail to achieve remission in a substantial portion of patients. Newer evidence suggests the pathophysiology of depression is a more complex story, highlighting a need for research in alternative therapies. Mounting evidence shows a linkage between depression and the supplement creatine monohydrate (CRMH). Research in rodent models suggests that CRMH may both alleviate depressive symptoms and enhance the efficacy of standard antidepressants like SSRIs. The following study describes findings from a combined fixed- and random-effects meta-analysis based on four empirical studies investigating the effect of CRMH …

The Effects Of Stress On Attentional Networks, Alice Tsvinev

Master's Theses

The human brain has developed mechanisms to aid our survival, including attentional networks and stress response. Attentional shifts allow humans to react accordingly to their environment, following innate processes like fight or flight. Prolonged exposure to acute stress interferes with such cognitive processes as attention and working memory, impacting attentional systems. The present study examined the effects of acute stress on visual attention processes, specifically focusing on the orienting, alerting, and executive attention networks. 49 participants were randomly placed in either a stress or non-stress condition, then asked to reflect on either stressful or positive moments in their lives, respectively. …

The Impacts Of Recreational Infrastructure On Mammal Use Of Riparian Zones In Northern California Regional Parks, Emily A. Matthews

Master's Theses

Public lands have been important for the protection of riparian habitats; however, many public lands are also used for recreation, which can reduce mammal habitat use. Understanding how mammals are affected by recreation in riparian areas can help guide management decisions. The goal of this research is to understand the effect of recreation on mammal use of riparian habitats in two popular East Bay Regional Parks, Charles Lee Tilden and Wildcat Canyon, and to map the extent of that impact. Cameras were deployed in the riparian areas of a high, moderate, and low development site (Alvarado, Tilden, and Wildcat Canyon) …

Using Moss As An Inexpensive Air Pollution Bioindicator For Environmental Equity In Santa Clara Country, California, Tam Dan Tran

Master's Theses

Toxins pervade urban areas and pose long-term health risks to humans. I examine moss as an affordable bioindicator and assess whether moss monitor results reflect other air quality (AQ) indicators, environmental factors, and social vulnerability. Specifically, I investigate (1) whether moss is an effective atmospheric pollution indicator and (2) whether low-income or high-lead-risk neighborhoods experience greater exposure to air pollution. I set out Hypnum cupressiforme moss for two months of exposure in 28 Santa Clara County locations and then measured chromium, zinc, nickel, and the loss of chlorophyll fluorescence in the moss tissue. I gathered real-time particulate matter (PM2.5) measurements …

An Assessment Of Anthropogenic Injuries On White Sharks (Carcharodon Carcharias) In Central California, Kaitlyn Yee

Master's Theses

As human activities increasingly impact marine ecosystems, understanding the effects of anthropogenic activity on white sharks is important for their continued conservation. Human-induced injuries are observed in many shark species. Such injuries have been found to have physiological and ecological impacts. Four sites in Central California off the coasts of Aptos, Año Nuevo Island, Southeast Farallon Island, and Point Reyes are all known areas of white shark aggregation with varying levels of human use and protection. Utilizing a vast video database, this study evaluated the effects of natural and non-natural anthropogenic shark injury types across all locations, age classes, and …

A Trailside Study Of A Coast Redwood Forest Understory Specis, Trillium Ovatum, In The Santa Cruz Mountains, Mary Yan

Master's Theses

To fully understand one of the world’s greatest terrestrial carbon sinks, the coast redwood forest, a co-occurring species may be the key to unique and accessible opportunities to collectively monitor the health of this important habitat. I investigated the relationship between hiking trails and Trillium ovatum within the redwood forests of three California State Parks. Utilizing quadrats across 115 one-meter plots and 58 10-meter transects, T. ovatum occurrence and abundance were recorded and analyzed with factors including proximity to trails, distance from streams, elevation, slope, canopy cover, duff depth, co-occurring understory species, and tree species dominance. Results indicated a higher …

Information About A Racial Demographic Shift May Influence Tolerance For Outgroup Contact, Yvonne N. Phan

Master's Theses

When exposed to information about a demographic shift towards a non-White majority in America, White individuals tend to prefer interactions and settings within their own ethnic group over minority ethnic groups. This behavior may suggest that future inter-racial dynamics in the U.S. could be characterized by resistance from White individuals. To understand how other racial groups respond to information about a racial demographic shift, I collected data on three measures of outgroup tolerance from a multiracial sample of students from San Jose State University’s participant database after exposing them to information about a racial demographic shift driven by a Hispanic …

Swim Bladder Morphology Influences The Responses Of Nearshore Rockfishes To Barotrauma, Molly K. Alvino

Master's Theses

Rockfishes (Sebastes spp.) are ecologically and economically important fishes in the continental shelf and slope regions of the Eastern Pacific Ocean. All species within the Sebastes genus have a buoyancy organ, the swim bladder, which is sensitive to rapid changes in pressure that occur when fish are caught and brought up to the surface. Although all rockfishes have swim bladders, pressure-related injuries (barotrauma) affect rockfish species differently. I determined whether swim bladder morphology can explain differences in barotrauma among semi-pelagic (Blue and Olive rockfish) and benthic (Gopher and Vermilion rockfish) species that occupy different habitat zones. Seven different swim bladder …

Exploring Community Adaptation To Public Safety Power Shutoff Events: Findings From Two Case Studies Of Unincorporated Mountain Communities In Southern California, Ramiro M. Brown

Master's Theses

As aging electrical infrastructure in the US continues to succumb to unyielding weather patterns brought on by climate change, there is an urgency among Investor-Owned Utilities (IOUs) to reduce the likelihood of their equipment sparking a wildfire. Public Safety Power Shutoffs (PSPS) – the intentional de-energization of the electrical grid on high fire weather danger days – have become a staple in IOU Wildfire Mitigation Plans (WMPs) since 2018 as one way to avoid wildfire ignitions via electrical infrastructure. One criticism of PSPS events is that they create their own hazard by cutting off power to thousands – sometimes millions-of …

Mammal Response To Wildfire In Redwood Forests In Northern California, Kristine Doerr

Master's Theses

California has historically experienced recurrent wildfires that have shaped many of the region’s unique ecosystems such as coast redwood (Sequoia sempervirens) forests. Redwood forests, particularly old-growth redwoods, are vital habitats for many wildlife species. Still, these long-living, fire-resistant trees are facing altered fire regimes due to fire suppression and climate change. The 2020 CZU Lightning Complex Fire was a consequence of these changes and significantly altered the landscape of the Santa Cruz Mountain region. This study analyzes mammal recovery after wildfire in high and low fire severity locations of the CZU Fire using two camera trap grids. The high-severity grid …

The Effects Of Full-Body Photo-Editing On Female Body Image, Claire E. Mcelhern

Master's Theses

Over the past decade, the use of photo-based social media sites has seen an exponential increase. Although these sites can be beneficial for connecting with others, the editing and modification of images posted to social media has also produced adverse effects on some who use them. The aim of the present study was to assess whether partaking in a full-body photo-editing task would have a significant effect on weight dissatisfaction, appearance dissatisfaction and body confidence, compared to a control condition. Female college participants were first asked about their general Instagram use, and then were given a baseline Visual Analog Scale …

The Moderating Role Of Meaningful Work On The Relationship Between Loss Of Self-Identity And Psychological Well-Being In Retired Collegiate Athletes, Sarah M. Kurd

Master's Theses

Collegiate athletes are a focal point for many universities. These student-athletes work most of their lives to make it to the university level. Many collegiate athletes aspire to make it to the professional level after they graduate from college, but only a rare handful make it to the top. The rest of the athlete population retires and is placed into a world of “normalcy,” but the transition out of athletics can be very challenging, impacting a person’s psychological well-being. Most of these athletes will have to work a professional job after leaving sports. The present study aimed to examine the …

Relationship Between Depression, Rumination, And Emotionally Valenced Working Memory Performance, Dewey Tran

Master's Theses

Working memory is limited in capacity and easily disrupted such that mood states and competing cognitive processes can impair performance. Rumination is highly associated with depression that may contribute to impaired working memory but has not often been studied. The goal of this study was to elucidate the relationship between depression severity, ruminative state, and working memory performance. Participants completed a baseline assessment of depression severity, rumination (trait and state), and working memory then randomly assigned to a rumination or control groups, followed by a second assessment. I hypothesized working memory would be explained by an interaction between depression severity …

Win-Win Ecology: Can Mosses Promote Dudleya Germination To Restore California Quarries?, Kate L. Worrell

Master's Theses

Human actions directly damage habitat for native plants; restoration ecology facilitates successful plant re-establishment in these environments. Open-pit mines leave behind steep, rocky, and nutrient-deficient habitats that are some of the most degraded ecosystems on the planet. Dudleya or ‘live-forevers’— a genus of native California succulent plants that contains many rare, threatened, or endangered species — grow on rocky cliffs and may create a successful reclamation-restoration story. However, Dudleya germination is poorly understood. Much of the literature on Dudleya cites a single field report suggesting that bryophytes facilitate germination, but no previous experiments have evaluated this proposal. In this study, …

It’S Complicated: The Level Of Risk Assigned To A Missing Person, Time They Were Missing For, And The Tasks Performed By Police Investigators., Karen Shalev, Craig Collie

International Journal of Missing Persons

This study examines the number of tasks police investigators perform by the level of risk assigned to cases and the length of time the investigations take to resolve. It analyses 40,091 solved cases from 2019 using data from eight English police forces, as part of a wider research project of missing person investigations demand on police resources. The findings show that (1) low and high risk with a search area cases have a relationship to the duration of the investigation; (2) there is a relationship between the risk classification and the number of tasks assigned to the case; (3) the …

An Exploration Into Why There Is An Overrepresentation Of Bame People In Missing Person Cases, Phoebe Sleigh-Johnson, Fiona Gabbert Dr., Adrian J. Scott

International Journal of Missing Persons

The overrepresentation of Black, Asian, and Minority Ethnic (BAME) people in missing person cases is an issue that is not understood within society and has largely been neglected within academic literature to date. This study, therefore, aims to explore why this overrepresentation might exist by obtaining the views and opinions of 24 professionals (including police officers) working within the field of missing people. The study used a qualitative, exploratory method and an anonymous online survey containing a series of open-ended questions. Thematic analysis was performed on the data, and three main themes were identified; the first related to the idea …

Supporting & Protecting Repeat Missing Children From Different Residential Environments: A Scoping Review, Kirsty Bennett Dr, Petra Salisbury, Rebecca O'Keefe, Sharon Vincent, Bethany Mccarthy

International Journal of Missing Persons

Repeat missing children pose a significant financial burden onto services, including the police, social services, and health providers. Recognising that 37 to 65 percent of missing child reports each year are repeats, efforts have been made by academics and practitioners to understand this societal problem. Research has identified the risks causing children to go missing and the harms that they experience, but these focus primarily on children missing from residential care only. This PRISMA (2020) scoping review of 76 studies explores strategies implemented to prevent repeat missing episodes, and the role/influence of the home environment (e.g., with parents/guardians, and foster …

Racial Bias In Risk Allocation And Resource Utilisation: A Contributing Factor To Ethnic Minority Overrepresentation In Missing Person Investigations?, Amy Van Langeraad, Fiona Gabbert, Adrian J. Scott

International Journal of Missing Persons

Statistics from the National Crime Agency reveal that people from ethnic minority backgrounds are over-represented within the missing population in the United Kingdom, and previous archival studies have shown there is a discrepancy in the recovery of ethnic minority missing persons compared to White missing persons. A wider body of research shows that racial bias is prevalent in the criminal justice system and law enforcement, resulting in different outcomes for victims depending on their racial background. Such outcomes have yet to be examined in the context of missing persons. Therefore, this study tries to address this gap in the literature …

Gait Measurement Descriptions Of Human Tracks, Robert Speiden

International Journal of Missing Persons

Search and rescue missions use a variety of tools to find missing persons, one of which can be visual tracking. Trackers detect, interpret and document information about human contact with the ground. Humans typically move on two feet at various speeds. Movement as an obligate biped leaves a series of footprints that alternates from one side to the other. This pattern of footfalls is rather simple, and the footfalls can be easily divided into descriptive dimensions.

This work summarized published measurements of bipedal gait ground contact points in 70 resources. Four resource types were surveyed including 33 biomechanical gait analysis …

Estimating Models For Engineering Costs On The State Highway Operation And Protection Program (Shopp) Portfolio Of Projects, Elhami Nasr, Tariq Shehab, Nigel Blampied, Vinit Kanani

Mineta Transportation Institute

The State Highway Operation and Protection Program (SHOPP) is crucial for maintaining California’s 15,000-mile state highway system, which includes projects like pavement rehabilitation, bridge repair, safety enhancements, and traffic management systems. Administered by Caltrans, SHOPP aims to preserve highway efficiency and safety, supporting economic growth and public safety. This research aimed to develop robust cost-estimating models to improve budgeting and financial planning, aiding Caltrans, the California Transportation Commission (CTC), and the Legislature. The research team collected and refined comprehensive data from Caltrans project expenditures from 1983 to 2021, ensuring a high-quality dataset. Subject matter experts validated the data, enhancing its …

Influence Of Social Media And Information Behaviour Of Postgraduate Students In Federal University Of Lafia, Nasarawa State, Nigeria, Philip Chike Aghadiuno Dr., Michael Akan Afukidang, Ebaye Asenath Sylvester

Library Philosophy and Practice (e-journal)

This study was carried out on influence of social media and information behaviour of postgraduate students in Federal University of Lafia, Nasarawa State, Nigeria. Three research questions and one (1) hypothesis guided the study. Descriptive research design was used, the population of the study consist of 462 postgraduate students of Federal University Lafia. Taro Yamane was used to determine the sample size of 214. The instrument used for data collection was a researcher designed questionnaire. Data generated from the research question was analyzed using descriptive statistics of mean and standard deviation while hypothesis was tested using Chi-square. The results …

Library Stock Management: Mandya University Library Scenario, Kavitha N., Hullerappa G., Sampath Kumar B.T.

Library Philosophy and Practice (e-journal)

Stock Verification is an essential part of library management that ascertains to check the library resources in the stock. It is an effective method to identify mistakes and prevent fraudulent procedures. The purpose of this article is to investigate the potential and intensive stock verification of more than 60000 documents from Mandya University Library. Study results reveal that 39127 library books are available in the powerhouse of the new library building constituent government college of Mandya University library and 23060 books are discarded as loss of books. Notable findings show that insufficient knowledge of cataloguing and classification rules has hampered …

The Effects Of Internal Training And Job Satisfaction Of Library Staff In Some Selected University Libraries In South-South, Nigeria, Okoh Helen Ewere, Ogonwa Jacinta, Ugbenyo Safiya, Ezeanuna Ginika, Ufuoma Eruvwe

Library Philosophy and Practice (e-journal)

The study investigated the effect of Internal trainings and job satisfaction of library staff in some selected university libraries in South-South, Nigeria. The study adopted a descriptive survey research design using questionnaire as instrument for data collection. The population of the study consists of 89 library staff which was randomly picked. A total of 89 questionnaires were distributed only 78 were retrieved. Data collected were analyzed using descriptive statistics mean and percentage mean score of 2.5 and above and percentage score of 50% were considered. The revealed that the effects of internal trainings of library staff in some selected university …

Navigating The Digital Frontier: Key Challenges For Dental College Librarians In Managing Electronic Collections, Trupti Aniruddha Tulsankar, Vrushali Rane

Library Philosophy and Practice (e-journal)

This study focuses on the challenges and opportunities in digital collection management faced by librarians in Dental College libraries across Maharashtra. The study findings reveal that there are limitations in using e-resources and the ICT infrastructure in dental college libraries needs to be improved. The challenges dental college librarians face include unannounced hikes in the pricing of digital resources, poor understanding and interpretation of licensing agreements, interrupted power supply, and lack of skilled library staff to manage resources. By addressing these challenges, Dental colleges can enhance their ability to give students access to the latest e-resources and support their learning …

Influence Of Mindfulness On Online Information Searching Strategies Of The University Of Ibadan Undergraduate Students, Abiola Moses Akinwale Mr

Library Philosophy and Practice (e-journal)

The objective of the study was to determine the impact of mindfulness on online information search strategies of undergraduate students at the University of Ibadan. The study assessed the level of online information search strategies, and mindfulness dimension, aiming at identifying the relationship between the independent variable (mindfulness dimension) on online information search strategies. The study was conducted on undergraduate students of the University of Ibadan.

The research adopted a correlational research survey design, with a total population of 11,812 students across seven faculties that were purposively determined, and a sample of 387 using Yamane (1967) sampling formula. The data …

Systematic Review On Self-Control A Predictor Of Work Performance Of Librarians In Public Universities In South Western Nigeria., Tola Abosede Ogunojemite

Library Philosophy and Practice (e-journal)

The purpose of, this study is to examine how self-control predicts work performance of librarians in public universities in southwestern Nigeria.

The research design adopted for the study was descriptive research survey design of the correlational type. A multi-stage sampling technique was adopted to draw 229 respondents. Data analysis was conducted based on frequency, percentage, mean and standard deviation, to answer the research questions Respondents of this study consisted of males (43.9%) and females (56.1%), majority (28.7%) aged 26-30. The findings revealed that the level of self-control of librarians in public universities in south-western Nigeria was high following the norm …