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2. Is the University of California Drifting toward Conformism? The Challenges of Representation and the Climate for Academic Freedom. Research & Occasional Paper Series: CSHE.5.2023
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University of California, Berkeley. Center for Studies in Higher Education (CSHE), Steven Brint, and Komi Frey
- Abstract
In this essay, we explore the consequences of the University of California's policies to address racial disparities and its support for social justice activism as influences on its commitment to academic freedom and other intellectual values. This is a story of the interaction between two essential public university missions -- one civic, the other intellectual -- and the slow effacement of one by the other. The University's expressed commitments to academic freedom and the culture of rationalism have not been abandoned, but they are too often considered secondary or when confronted by new administrative initiatives and social movement activism related to diversity, equity, and inclusion (DEI). The experimental use of mandatory DEI statements on a number of the ten UC campuses, within willing academic departments, as initial screening mechanisms in faculty hiring is the most dramatic of the new administrative policies that have been put into place to advance faculty diversity. This policy can be considered the most problematic of a series of efforts that the UC campuses and the UC Office of the President have taken for more than a decade to prioritize representation in academic appointments. Our intent is to encourage a discussion of these policies within UC in light of the University's fundamental commitments to open intellectual inquiry, the discovery and dissemination of a wide range of new knowledge, and a culture of rationalism.
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- 2023
3. Talent Pipelines for the Fourth Industrial Revolution: How California PaCE Units Can Bridge Critical KSA Gaps. Research & Occasional Paper Series: CSHE.8.2024
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University of California, Berkeley. Center for Studies in Higher Education (CSHE), Tyler Reeb, Chris Swarat, and Barbara Taylor
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This paper presents a rationale for using professional and continuing education (PaCE) units at post-secondary institutions throughout California to design and implement talent-pipelines, research and development collaborations, and other knowledge ecosystems where emerging and returning professionals can acquire the knowledge, skills, and abilities (KSAs), as well as the experience, they need to address the challenges of the Fourth Industrial Revolution (4IR). The paper provides an analysis of the reasons why PaCE units are uniquely positioned to address the needs of industry and job seekers, and on a timetable that keeps pace with 4IR velocity.
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- 2024
4. Reform and Reaction: The Politics of Modern Higher Education Policy. Research & Occasional Paper Series: CSHE.7.2023
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University of California, Berkeley. Center for Studies in Higher Education (CSHE) and David O’Brien
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An ongoing debate in K-12 education policy has been between the "reform" agenda, including charter schools and school vouchers, and advocates of traditional public schools, led by educator unions. A similar split has emerged in higher education, particularly community colleges. Using California as an example, this paper: 1) summarizes the evolution of the current political divide between advocates of the "completion and success" agenda and faculty-led opponents, including the major reforms involved, 2) discusses the claims that leading organizations on each side have made, including their policy priorities, and 3) argues that the two sides share do share some areas of mutual agreement. The paper concludes by noting future policy considerations that could complicate reform efforts.
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- 2024
5. Parenting in a Pandemic: Understanding the Challenges Faced by California Community College Students and Actionable Recommendations for Policy. Research & Occasional Paper Series: CSHE.4.2024
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University of California, Berkeley. Center for Studies in Higher Education (CSHE), Dulcemonica Delgadillo, Norma Hernandez, Margarita Jimenez-Silva, and Ruth Luevanos
- Abstract
The COVID-19 pandemic has presented numerous challenges to students across the United States, particularly those who are parents enrolled in community colleges. California's community college system serves a diverse student population, including a significant number of non-traditional, working adults who are also parents. These students have faced unprecedented challenges due to the pandemic, including the difficulties of balancing childcare responsibilities with academic and professional obligations. This paper summarizes the preliminary findings of a study that intends to contribute to the crucial conversation around childcare needs among community college students. The focus of this study was understanding the experiences of BIPOC (Black, Indigenous, People of Color) mothers with young children and the impact of COVID-19 on their educational experiences in community colleges across the state of California.
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- 2024
6. Mapping Organizational Support and Collective Action: Towards a Model for Advancing Racial Equity in Community College. Research & Occasional Paper Series: CSHE.6.2024
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University of California, Berkeley. Center for Studies in Higher Education (CSHE), Eric R. Felix, Ángel de Jesus González, and Elijah J. Felix
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In this paper we present the Advancing Racial Equity in Community College Model which maps out the organizational conditions shaping institutional transformation. Focused on two dimensions, the level of "organizational support" and "shared responsibility" to enact equity, we describe four quadrants with distinct organizational conditions that shape how equity advocates design, build, and sustain equity efforts. With well-documented racial inequities and renewed calls for racial justice across higher education, it demands new ways of exploring and understanding how institutional actors leading equity efforts are nested within differing organizational contexts that can enable as well as restrict the enactment and success of racial equity efforts. Our model helps equity advocates gain an "awareness" of known barriers to implementation in higher education, assess the readiness of their campus for racialized change, and take action to build the necessary institutional support and capacity to move the work forward.
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- 2024
7. Working Towards an Equitable Future in California Dual Enrollment Programs. Research & Occasional Paper Series: CSHE.9.2024
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University of California, Berkeley. Center for Studies in Higher Education (CSHE) and Rogelio Salazar
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This study explores the underrepresentation of Black and Latinx students in California's community college Dual Enrollment (DE) programs. The study investigates how DE staff describe an understanding and commitment towards equity for Black and Latinx students in DE programs and how staff engage in equitably aimed praxis to serve Black and Latinx students through practices and collaborations between feeder high schools. Using a Critical Policy Analysis lens, the research highlights how Black and Latinx students are prioritized through equitable practices focused in advising and outreach. However, not all DE staff prioritize Black and Latinx through practices. Despite this, scant instances reveal that collaborative efforts between DE programs, high schools, and districts improve DE services and outcomes, though majority of K-12 partners are absent from collaborative efforts led by DE programs. The study emphasizes the need for increased collaboration between K-12 partners and integrating equitable approaches to DE outreach and advising to engage and recruit Black and Latinx students. This research advances the conversation of equity in DE programs and offers insights for addressing participation gaps among Black and Latinx students.
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- 2024
8. Creating a Great Public University: The History and Influence of Shared Governance at the University of California. Research & Occasional Paper Series: CSHE.4.2023
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University of California, Berkeley. Center for Studies in Higher Education (CSHE) and John Aubrey Douglass
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Since establishing its first campus in 1868, the University of California (UC), California's land-grant university, developed into the nation's first multi-campus system in the United States, and is today widely recognized as the world's premier network of public research universities. This short essay provides an historical brief on the role that shared governance, and specifically the role of the Academic Senate, played in creating an academic culture of excellence and high achievement in pursuing its tripartite mission of teaching and learning, research and knowledge production, and public service. A key component in understanding the critical role of the Senate in UC's evolution from a single campus in Berkeley to now a ten-campus system is the university's unusual designation as a public trust in the state constitution that, beginning in 1879, protected the university at critical times from external political pressures and allowed the university to develop an internal academic culture guided by the Academic Senate. By the 1920s, the emergence of California's unique and innovative public system of higher education, with UC as the sole public provider of doctoral degrees and state funded research, also helps explain the ability of the UC system to maintain its mission and formulate what is termed a "One University" model. The Academic Senate has created coherency and shared values within UC, and a culture and expectation for faculty performance that is unique among universities around the world. This essay also offers a brief reflection on the Academic Senate's past influence, its current status, and prospective role. The overall intent is to provide context for the current academic community and higher education scholars regarding the past and future role of faculty in university governance and management, and what distinguishes UC in the pantheon of major research universities.
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- 2023
9. Analysis of an In-School Mental Health Services Model for K-12 Students Requiring Intensive Clinical Support: A White Paper Report on Tier 3 School-Based Mental Health Programming
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Dettmer, Amanda M.
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Emotional, behavioral, and mental health challenges make it difficult for many children and adolescents to engage and succeed at school. Research indicates that at least 20% of all children and adolescents have been diagnosed with one more mental health disorders. Behavioral problems, anxiety, and depression are the most diagnosed mental health issues, and they often co-occur. Moreover, these conditions are being diagnosed at increasingly younger ages. In the past several years there has been a rise in the number of adolescents and young adults with serious mental health issues such as major depression and suicidal ideation, and the COVID-19 pandemic has exacerbated mental health problems for children and adolescents. Schools offer promise for providing intensive clinical support to the most at-risk students, and schools are necessary environment to explore the implementation of multi-modal youth mental health services. This paper provides an analysis of an intensive, in-school mental health services model developed and implemented by Effective School Solutions (ESS), a New Jersey based provider of high acuity school based mental health services for K-12 students. We analyze this multi-modal model for its effectiveness in improving educational outcomes for over 3,000 students identified as requiring intensive clinical mental health support across the 2021-22 school year. This analysis reveals that those students receiving High- versus Low-fidelity programming (i.e., multiple sessions per week for at least half of the school year versus for less than half of the school year) had better educational outcomes. Students receiving High-fidelity programming had greater improvements in grade point average (GPA) and greater reductions in absences across the school year. A higher number of in-school clinical sessions per week significantly predicted a greater increase in GPA and a greater reduction in total disciplinary incidents (including out of school suspensions) across the school year. This report provides initial promising evidence that in-school intensive mental health clinical services yield positive effects on students' educational outcomes. Though future research is needed to validate and extend these findings, schools may consider implementing such services onsite to meet students where they are and to optimize students' mental, behavioral, and educational well-being. [This white paper report was published by the Yale Child Study Center."]
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- 2023
10. Examining Racial (In)Equity in School-Closure Patterns in California. Working Paper
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Stanford University, Policy Analysis for California Education (PACE), Pearman, Francis A., II, Luong, Camille, and Greene, Danielle Marie
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This study investigates racial disparities in school closures both within California and nationally. Findings highlight an alarming pattern: Schools enrolling higher proportions of Black students are at significantly increased risk of closure relative to those enrolling fewer Black students, a pattern that is more pronounced in California than elsewhere in the United States. This study also finds that conventional explanations for school closures--such as declining enrollments, poverty rates, and achievement differences--cannot fully account for why schools enrolling larger shares of Black students have greater odds of closure. These findings underscore that school closures in California and elsewhere reflect racial inequalities that require adequate policymaking to ensure equitable and fair school-closure proceedings
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- 2023
11. Going beyond Development: Faculty Professional Learning - An Academic Senate Obligation to Promote Equity-Minded Practices That Improve Instruction and Student Success. Position Paper. Adopted Spring 2021
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Academic Senate for California Community Colleges
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A focus on faculty professional learning, given the challenges that California community colleges and students face, must remain a high priority and continue to evolve. The Academic Senate for California Community Colleges (ASCCC) has long been an advocate for the development of robust professional development policies as part of senate purview under Title 5 §53200, colloquially referred to as the 10+1. Indeed, as student populations within the California community colleges become more diverse, colleges seek to improve student success and close the opportunity gap for marginalized communities. The ASCCC has passed numerous resolutions in support of intentional learning opportunities to address diversity, equity, inclusion, and anti-racism throughout the curriculum and college cultures. Such intentional learning must be a significant component of faculty professional learning and development. The goal and purpose of this paper is to examine the importance of faculty professional learning that is necessary to improve student success as well as the role local academic senates can play in such efforts. The paper will examine the issues from both a philosophical and practical point of view.
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- 2022
12. The Role of Faculty in Tutoring and Learning Centers in the Community College. Position Paper. Adopted Fall 2021
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Academic Senate for California Community Colleges, Aschenbach, Cheryl, Blake, T, Gavaskar, Vandana, Sanchez, Ray M., and Whetzel, Tascha
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The primary purpose of this paper is to emphasize and reiterate the centrality of the faculty role in tutoring and learning centers, where peer-to-peer, discipline-specific collaborative learning is the primary objective. This paper provides a breadth of content for practitioners in the field and also assists those seeking to understand the unique role of the tutoring and learning center and the faculty that develop and lead these services. The Academic Senate for California Community Colleges asserts that faculty, preferably full-time, tenure-track faculty, should oversee tutoring and learning centers. The tutoring and learning center is a crucial instructional space on campus that should be supervised and led by faculty. [Written in collaboration with the Transfer, Articulation, and Student Success Committee 2020-2021.]
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- 2022
13. Using Predicted Academic Performance to Identify At-Risk Students in Public Schools. Working Paper No. 261-0922
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National Center for Analysis of Longitudinal Data in Education Research (CALDER) at American Institutes for Research, Fazlul, Ishtiaque, Koedel, Cory, and Parsons, Eric
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Measures of student disadvantage--or risk--are critical components of equity-focused education policies. However, the risk measures used in contemporary policies have significant limitations, and despite continued advances in data infrastructure and analytic capacity, there has been little innovation in these measures for decades. We develop a new measure of student risk for use in education policies, which we call Predicted Academic Performance (PAP). PAP is a flexible, data-rich indicator that identifies students at risk of poor academic outcomes. It blends concepts from emerging "early warning" systems with principles of incentive design to balance the competing priorities of accurate risk measurement and suitability for policy use. PAP is more effective than common alternatives at identifying students who are at risk of poor academic outcomes and can be used to target resources toward these students--and students who belong to several other associated risk categories--more efficiently.
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- 2022
14. Policy and Planning in the Midst of Crisis: Supporting Student Learning during the COVID-19 Pandemic. Working Paper
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Stanford University, Policy Analysis for California Education (PACE), Hurtt, Alexandria, Reed, Sherrie, Dykeman, Kramer, and Luu, Justin
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As the COVID-19 crisis disrupted schooling, recovery efforts to ensure educational continuity in California included the adoption of Senate Bill 98, which mandated local educational agencies (LEAs) to complete Learning Continuity and Attendance Plans (LCPs). These plans act as critical snapshots of sensemaking in the midst of crisis; however, their details have yet to be explored statewide, concealing the potential trends that arise in local planning when traditional schooling is disrupted by crisis. Through a multiphase, mixed methods approach, this study examines the legislative requirements of an educational policy that orchestrated large-scale local planning. Results suggest that, during a crisis, equity is centered in both policy and the plans of public school districts, threaded through accessibility to instruction as well as academic and social-emotional supports. [For the Policy Brief, see ED624610.]
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- 2022
15. Eligibility for Admission to the University of California after the SAT/ACT: Toward a Redefinition of Eligibility. Research & Occasional Paper Series: CSHE.2.2022
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University of California, Berkeley. Center for Studies in Higher Education (CSHE) and Geiser, Saul
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Eligibility is a policy construct unique to California. UC and CSU are the only US universities that distinguish between eligibility for admission and admission itself and set separate requirements for each. The eligibility construct derives originally from California's 1960 Master Plan for Higher Education, which famously mandated that UC admit students from the top 12.5% (and CSU from the top 33.3%) of California public high school graduates. Thus began a long and twisting saga of policy implementation that has become increasingly convoluted over time. UC's decision to eliminate the SAT/ACT in university admissions presents an opportune moment to rethink the eligibility construct from the ground up. This essay proposes, first, eliminating the now-antiquated "Eligibility Index," a mechanical algorithm that is increasingly at odds with the thrust of UC admissions policy over the past two decades; second, moving from a 12.5% eligibility target (the percentage of students who qualify for admission) to a 7.5% participation target (the percentage who actually enroll); and third, redefining eligibility from a norm-referenced to a criterion-referenced construct. "Using holistic or comprehensive review to select from among applicants who have successfully completed UC subject requirements at a specified level of proficiency, UC would admit that number of applicants needed to yield a 7.5% participation rate among California high school graduates." This is the same average participation rate that the Master Plan has yielded historically, so that the proposal would be revenue-neutral with respect to State funding for UC. At the same time, like the 12.5% eligibility target, a 7.5% participation target would tie UC enrollment growth to growth in California's college-age population. Conversion from an eligibility to a participation target would not eliminate the eligibility construct but would redefine it. In place of a norm-referenced standard -- whether students rank in the "top 12.5%" -- eligibility would be redefined as a criterion-referenced standard: Whether students have mastered the foundational knowledge and skills needed to succeed at UC. When we judge students against that standard, two truths become evident. First is that the pool of students who are qualified for and can succeed at UC is far larger than UC can accommodate; the chief advantage of a criterion-referenced standard is the greater scope for UC to select from a broader, more diverse pool of qualified applicants. Second is that expanding eligibility is much less a priority than increasing actual enrollment and participation rates among the pool of those who are already qualified.
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- 2022
16. College Major Restrictions and Student Stratification. Research & Occasional Paper Series: CSHE.14.2021
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University of California, Berkeley. Center for Studies in Higher Education, Bleemer, Zachary, and Mehta, Aashish
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Underrepresented minority (URM) college students have been steadily earning degrees in relatively less-lucrative fields of study since the mid-1990s. A decomposition reveals that this widening gap is principally explained by rising stratification at public research universities, many of which increasingly enforce GPA restriction policies that prohibit students with poor introductory grades from declaring popular majors. We investigate these GPA restrictions by constructing a novel 50-year dataset covering four public research universities' student transcripts and employing a dynamic difference-in-difference design around the implementation of 29 restrictions. Restricted majors' average URM enrollment share falls by 20 percent, which matches observational patterns and can be explained by URM students' poorer average pre-college academic preparation. Using first-term course enrollments to identify students who intend to earn restricted majors, we find that major restrictions disproportionately lead URM students from their intended major toward less-lucrative fields, driving within-institution ethnic stratification and likely exacerbating labor market disparities. [Funding for this report was provided by University of California Humanities Research Institute and Opportunity Insights.]
- Published
- 2021
17. Towards a Digital Equity Foundation: Best Practices for Governance, Accountability, & Transparency for Foundations Established with Public Assets
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New America Foundation and Bell, Charles
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In April 2021, New America's Open Technology Institute (OTI) and the Philanthropication thru Privatization Project (PtP) released a joint proposal that the federal government should invest a substantial portion of the windfall proceeds from future auctions of public airwaves (spectrum) to seed a new Digital Equity Foundation dedicated to addressing equity gaps in broadband adoption and affordability, education, telehealth, access to government services, and other critical areas. The next step in realizing this vision is now in the hands of Congress and other federal policymakers, as allocation of spectrum auction proceeds to support the creation of a Digital Equity Foundation requires legislation. Policymakers will also play a critical role in establishing the guidelines for the creation of an initial foundation board and mission. This paper serves to help flesh out the options for how that could be accomplished, drawing on a review of existing foundations created with public and nonprofit assets to identify best practices for how to start a foundation with public, quasi-public, or nonprofit funds. This paper is structured in five parts. Part I provides a brief overview of the proposed Digital Equity Foundation; Part II, examines some key examples of existing U.S. foundations that illustrate the use of public or quasi-public funds to support priority public needs; Part III, explores ways the proposed Digital Equity Foundation might be structured and organized to achieve its programmatic goals to advance digital equity and inclusion, while operating with appropriate transparency and public accountability; Part IV, considers additional legal considerations that surfaced in a review of foundations previously established under federal legislation; and Part V, provides a summary of concrete recommendations for the proposed foundation. [This report is a joint product of the Open Technology Institute at New America and the Philanthropication thru Privation Project.]
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- 2022
18. Are the Mission Statements of Two Large U.S. Public Business University Systems Inspiring? You Decide!
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James I. Schaap and Angel F. González
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Mission statements have become increasingly important for the accreditation of business universities and colleges. Thus, understanding similarities and differences in the content of business school mission statements is especially timely. The mission statement is also the first component of the strategic management process. It provides the framework or context within which strategies are formulated. This descriptive/informative study aims to present a background that describes and explains institutional mission statements and removes the so-called uncertainty encompassing the foci while preserving exceptional quality--a necessary quality for a compelling mission statement. We question whether all California State University (CSU) and The State University of New York (SUNY) business colleges/schools have developed enduring and inspiring mission statements for their employees and students? While no specific rule regarding length exists, we examined the word count length of these two school system mission statements. Institutions must not make their mission statements too long or too short, or they will risk losing focus and missing essential elements to guide their organization. The mission statement must be long enough to achieve its purpose. Based on our findings, we recommend that all CSU and SUNY campuses embrace a more straightforward, easy-to-understand, hard-hitting, lasting, and inspirational mission statement for their business colleges/schools, one directly relevant to faculty, staff, students, and their families.
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- 2023
19. A comparison of methods for excluding light from stems to evaluate stem photosynthesis.
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Valverdi, Nadia A., Acosta, Camilla, Dauber, Gabriella R., Goldsmith, Gregory R., and Ávila‐Lovera, Eleinis
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SURFACE temperature ,AVOCADO ,HUMIDITY ,PHOTOSYNTHESIS ,WATER vapor ,CARBON dioxide ,ALUMINUM foil - Abstract
Copyright of Applications in Plant Sciences is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2023
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20. Nowcasting Earthquakes With Stochastic Simulations: Information Entropy of Earthquake Catalogs.
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Rundle, John B., Baughman, Ian, and Zhang, Tianjian
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EARTHQUAKES ,EARTHQUAKE aftershocks ,ENTROPY (Information theory) ,MACHINE learning ,EARTHQUAKE hazard analysis ,RECEIVER operating characteristic curves ,CATALOGS ,ENTROPY - Abstract
Earthquake nowcasting has been proposed as a means of tracking the change in large earthquake potential in a seismically active area. The method was developed using observable seismic data, in which probabilities of future large earthquakes can be computed using Receiver Operating Characteristic methods. Furthermore, analysis of the Shannon information content of the earthquake catalogs has been used to show that there is information contained in the catalogs, and that it can vary in time. So an important question remains, where does the information originate? In this paper, we examine this question using stochastic simulations of earthquake catalogs. Our catalog simulations are computed using an Earthquake Rescaled Aftershock Seismicity ("ERAS") stochastic model. This model is similar in many ways to other stochastic seismicity simulations, but has the advantage that the model has only 2 free parameters to be set, one for the aftershock (Omori‐Utsu) time decay, and one for the aftershock spatial migration away from the epicenter. Generating a simulation catalog and fitting the two parameters to the observed catalog such as California takes only a few minutes of wall clock time. While clustering can arise from random, Poisson statistics, we show that significant information in the simulation catalogs arises from the "non‐Poisson" power‐law aftershock clustering, implying that the practice of de‐clustering observed catalogs may remove information that would otherwise be useful in forecasting and nowcasting. We also show that the nowcasting method provides similar results with the ERAS model as it does with observed seismicity. Plain Language Summary: Earthquake nowcasting was proposed as a means of tracking the change in the potential for large earthquakes in a seismically active area, using the record of small earthquakes. The method was developed using observed seismic data, in which probabilities of future large earthquakes can be computed using machine learning methods that were originally developed with the advent of radar in the 1940s. These methods are now being used in the development of machine learning and artificial intelligence models in a variety of applications. In recent times, methods to simulate earthquakes using the observed statistical laws of earthquake seismicity have been developed. One of the advantages of these stochastic models is that it can be used to analyze the various assumptions that are inherent in the analysis of seismic catalogs of earthquakes. In this paper, we analyze the importance of the space‐time clustering that is often observed in earthquake seismicity. We find that the clustering is the origin of information that makes the earthquake nowcasting methods possible. We also find that a common practice of "aftershock de‐clustering", often used in the analysis of these catalogs, removes information about future large earthquakes. Key Points: Earthquake nowcasting tracks the change in the potential for large earthquakes, using information contained in seismic catalogsWe analyze the information contained in the space‐time clustering that is observed in earthquake seismicityWe find that "aftershock de‐clustering" of catalogs removes information about future large earthquakes that the nowcasting method uses [ABSTRACT FROM AUTHOR]
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- 2024
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21. State-Level Policies to Incentivize Workplace Learning: Impacts of a California Publicly Funded Employee Training Program.
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Negoita, Marian and Goger, Annelies
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ORGANIZATIONAL learning ,SALE of business enterprises ,CORPORATE culture ,MARKET failure ,BUSINESS size ,EMPLOYEE training - Abstract
The inability of labor markets to function effectively to satisfy the needs of employers and workers suggests that there is a growing need for policy interventions to promote workplace cultures of learning and innovation. Past research suggests that publicly funded incumbent worker training programs are a promising antidote against market failures. With only a handful of studies published in the last two decades, however, this is one of the least-researched types of business support programs. This paper examines the impact of a state program in California that uses a pay-for-performance approach to reimburse employers that train their employees: the California Employment Training Panel (ETP). Based on a mixed-methods study of ETP, the authors found that, overall, ETP had positive and significant impacts on company sales and firm size. The study suggests the need to abandon ideological debates and engage in more evidence-based policy discussions about incumbent worker training programs. [ABSTRACT FROM AUTHOR]
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- 2024
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22. Accurate Prediction of Dissolved Oxygen in Perch Aquaculture Water by DE-GWO-SVR Hybrid Optimization Model.
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Bao, Xingsheng, Jiang, Yilun, Zhang, Lintong, Liu, Bo, Chen, Linjie, Zhang, Wenqing, Xie, Lihang, Liu, Xinze, Qu, Fangfang, and Wu, Renye
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GREY Wolf Optimizer algorithm ,WATER quality monitoring ,DIFFERENTIAL evolution ,WATER quality ,BODIES of water ,PEARSON correlation (Statistics) ,DISSOLVED oxygen in water ,IONIC conductivity - Abstract
In order to realize the accurate and reliable prediction of the change trend of dissolved oxygen (DO) content in California perch aquaculture water, this paper proposes a second-order hybrid optimization support vector machine (SVR) model based on Differential Evolution (DE) and Gray Wolf Optimizer (GWO), shortened to DE-GWO-SVR, to predict the DO content with the characteristics of nonlinear and non-smooth water quality data. Experimentally, data for the water quality, including pH, water temperature, conductivity, salinity, total dissolved solids, and DO, were collected. Pearson's correlation coefficient (PPMCC) was applied to explore the correlation between each water quality parameter and DO content. The optimal DE-GWO-SVR model was established and compared with models based on SVR, back-propagation neural network (BPNN), and their optimization models. The results show that the DE-GWO-SVR model proposed in this paper can effectively realize the nonlinear prediction and global optimization performance. Its R
2 , MSE, MAE and RMSE can be up to 0.94, 0.108, 0.2629, and 0.3293, respectively, which is better than those of other models. This research provides guidance for the efficient prediction of DO in perch aquaculture water bodies for increasing the aquaculture effectiveness and reducing the aquaculture risk, providing a new exploratory path for water quality monitoring. [ABSTRACT FROM AUTHOR]- Published
- 2024
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23. Controlling Reproduction and Disrupting Family Formation: California Women's Prisons and the Violent Legacy of Eugenics.
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Avila, Vrindavani and James, Jennifer Elyse
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EUGENICS ,PREDICATE (Logic) ,PRISONS ,REPRODUCTIVE rights ,PRISON population ,TWENTIETH century - Abstract
Prisons in the United States serve as a site and embodiment of gendered and racialized state violence. The US incarcerates more people than any other nation in both numbers and per capita rates. Individuals incarcerated in women's prisons are 10% of the total prison population, yet women's prisons remain understudied, and the violence that occurs in women's facilities is rampant, widespread, and operates in particular racialized and gendered ways. This paper centers the forced sterilizations that occurred in California state prisons over the last two decades. We consider how reproduction and the nuclear family have served as a primary site of racial capitalism and eugenic ideology. While eugenic policies were popularized and promoted across the US and globally in the 20th century, the violent ideas underlying eugenic ideology have been a constant presence throughout US history. The height of the eugenics era is marked by the forcible sterilization of institutionalized 'deviant' bodies. While discussions of eugenics often center these programs, the reach of eugenic policies extends far beyond surgical interventions. We utilize a reproductive justice lens to argue that the hierarchical, racialized social stratification necessary for the existence of prisons constructs and sustains the 'deviant' bodies and families that predicate eugenic logic, policies, and practices. In this conceptual paper, we draw from ongoing research to argue that prisons, as institutions and as a product of racial capitalism, perpetuate the ongoing violent legacy of eugenics and name abolition as a central component of the fight to end reproductive oppression. [ABSTRACT FROM AUTHOR]
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- 2024
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24. Embedded Tutoring in California Community Colleges: Perspectives from the Field on a Promising Practice
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Research for Action (RFA), Mark Duffy, and Kri Burkander
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Drawing on qualitative data collected in a sample of colleges as part of a larger study on the implementation and impact of AB 705 in California, this paper explores the rollout of corequisite reforms, focusing on the use of embedded tutors in introductory math and English courses as a strategy to meet to the needs of students. This paper highlights promising practices identified through extant research and fieldwork at study institutions, provides additional evidence on the value of the reform, discusses challenges, and makes recommendations for the field.
- Published
- 2023
25. Development and Application of a Written Communication Rubric to Improve Baccalaureate Nursing Student Writing.
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Smart, Christie M. and Wall Parilo, Denise M.
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COLLEGE students ,NATIONAL competency-based educational tests ,STUDENT assignments ,PILOT projects ,EVALUATION of human services programs ,ACADEMIC medical centers ,PRE-tests & post-tests ,EDUCATIONAL tests & measurements ,T-test (Statistics) ,NURSING research ,COMMUNICATION ,DESCRIPTIVE statistics ,NURSING students ,WRITTEN communication ,DATA analysis software - Abstract
Aims. Baccalaureate nursing students often enter nursing programs with varying degrees of writing skills. The use of formative assessment can provide students and faculty with information to act upon during a course and improve learning. This study aimed to test the use of a program-level written communication rubric as a formative assessment to be able to provide targeted interventions for improvement as part of curricular evaluation. Methods. A written communication rubric (14 criteria with scores ranging from 1–4) was applied twice during the semester to assess the writing assignments of 33 undergraduate nursing students enrolled in a nursing research course. A targeted intervention was designed and implemented based on deficient aggregate assessment results from the first student assignment. Results. Paired t-test analysis demonstrated a significant upward change in student performance in the second student assignment for all seven of the targeted competency scores (all p < 0.05). Conclusions. The use of a program-level rubric as a formative assessment paired with a targeted intervention improved the writing skills of nursing students during a single semester. By harnessing the tools of online learning management systems, faculty can quickly identify specific challenges for students in academic writing. There is potential for formative assessment to be used by faculty and students to direct the ongoing development of writing skills both during a course and throughout the program of study. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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26. The Digital Transition: Are Adults Aged 65 Years or Older Willing to Complete Online Forms and Questionnaires in Patient Portals?
- Author
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Gordon, Nancy P., Zhang, Sherry, Lo, Joan C., and Li, Christina F.
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OLDER people ,PATIENT portals ,TRANSITION to adulthood ,HEALTH care teams - Abstract
INTRODUCTION: Patients are being encouraged to complete forms electronically using patient portals rather than on paper, but willingness of older adults to make this transition is uncertain. METHODS: The authors analyzed data for 4105 Kaiser Permanente Northern California 2020 Member Health Survey respondents aged 65-85 years who answered a question about willingness to complete online forms and questionnaires using a patient portal. Data weighted to the Kaiser Permanente Northern California membership were used to estimate percentages of older adults willing to complete patient portal forms and questionnaires. Chi-square tests and log-Poisson regression models that included sociodemographic, internet use, and patient portal variables were used to identify factors predictive of willingness. RESULTS: Overall, 59.6% of older adults were willing to complete patient portal forms, 17.6% were not willing, and 22.8% were not sure. Adults aged 75-85 (49.5%) vs 65-74 years (64.8%) and Black (51.9%) and Latino (46.5%) vs White (62.8%) adults were less likely to indicate willingness. In addition to racial and ethnic differences and younger age, higher educational attainment, use of the internet alone (vs internet use with help or not at all), having an internet-enabled computer or tablet, and having sent at least 1 message through the patient portal increased likelihood of being willing. CONCLUSIONS: Health care teams should assess older adults' capabilities and comfort related to completion of patient portal-based forms and support those willing to make the digital transition. Paper forms and oral collection of information should remain available for those unable or unwilling to make this digital transition. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
27. It's in the bag? The effect of plastic carryout bag bans on where and what people purchase to eat.
- Subjects
PLASTIC bag laws ,CONSUMER behavior ,GROCERY shopping ,BORDERLANDS ,CONSUMERS ,ENVIRONMENTAL health - Abstract
This paper examines how banning the use of plastic carryout bags at grocery stores affects where and what people purchase to eat. Using quasi‐random variation in local bag ban adoption across California and two data sources (retail scanner data and consumer survey data), I show that banning plastic carryout bags shifted some food sales away from regulated grocery stores toward unregulated grocery stores and restaurants. Specifically, I find that bag bans cause a 1.8% decline in food‐at‐home sales and a 1.9 percentage point increase in consumers' food‐away‐from‐home expenditure share. The decline in food‐at‐home sales is larger in jurisdictions more likely to experience cross‐border shopping, whereas the increase in food‐away‐from‐home expenditures is larger farther from jurisdiction borders. Together these results suggest that a small share of consumers find a way to bypass the bag bans—either by cross‐border shopping if near a border or by shifting to restaurants if not near a border. Heterogeneity analyses reveal the policy effects are strongest for those with higher incomes, those under 65 years, and those with young children, suggesting both income effects and time constraints as mechanisms behind the behavioral change. By quantifying consumer avoidance behaviors, these results enable policymakers to more accurately measure the impacts of their regulations and to understand the potential trade‐offs between their environmental and public health objectives. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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28. Toward on-demand measurements of greenhouse gas emissions using an uncrewed aircraft AirCore system.
- Author
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Zhu, Zihan, González-Rocha, Javier, Ding, Yifan, Frausto-Vicencio, Isis, Heerah, Sajjan, Venkatram, Akula, Dubey, Manvendra, Collins, Don, and Hopkins, Francesca M.
- Subjects
GREENHOUSE gases ,STANDARD deviations ,WIND speed ,MOLE fraction ,DAIRY farms ,ATMOSPHERIC methane - Abstract
This paper evaluates the performance of a multirotor uncrewed aircraft and AirCore system (UAAS) for measuring vertical profiles of wind velocity (speed and direction) and the mole fractions of methane (CH 4) and carbon dioxide (CO 2) , and it presents a use case that combines UAAS measurements and dispersion modeling to quantify CH 4 emissions from a dairy farm. To evaluate the atmospheric sensing performance of the UAAS, four field deployments were performed at three locations in the San Joaquin Valley of California where CH 4 hotspots were observed downwind of dairy farms. A comparison of the observations collected on board the UAAS and an 11 m meteorological tower show that the UAAS can measure wind velocity trends with a root mean squared error varying between 0.4 and 1.1 m s -1 when the wind magnitude is less than 3.5 m s -1. Findings from UAAS flight deployments and a calibration experiment also show that the UAAS can reliably resolve temporal variations in the mole fractions of CH 4 and CO 2 occurring over periods of 10 s or longer. Results from the UAAS and dispersion modeling use case further demonstrate that UAASs have great potential as low-cost tools for detecting and quantifying CH 4 emissions in near real time. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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29. A Snapshot of Lead in Consumer Products Across Four US Jurisdictions.
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Porterfield, Kate, Hore, Paromita, Whittaker, Stephen G., Fellows, Katie M., Mohllajee, Anshu, Azimi-Gaylon, Shakoora, Watson, Berna, Grant, Isabel, and Fuller, Richard
- Subjects
LEAD analysis ,LEAD exposure ,HOUSEHOLD supplies ,ENVIRONMENTAL exposure ,LEAD - Abstract
BACKGROUND: Following the removal of lead from gasoline, paint and pipes were thought to be the main sources of lead exposure in the United States. However, consumer products, such as certain spices, ceramic and metal cookware, traditional health remedies, and cultural powders, are increasingly recognized as important sources of lead exposure across the United States. OBJECTIVE: This paper reviews data from four US jurisdictions that conduct in-home investigations for children with elevated blood lead levels (BLLs) to examine the prevalence of lead exposures associated with consumer products, in comparison with housing-related sources. METHODS: Authors reviewed investigation data (2010–2021) provided by California, Oregon, New York City, and King County, Washington, and compared the extent of lead exposures associated with housing-related vs. consumer products–related sources. DISCUSSION: The proportion of investigations identifying consumer products–related sources of lead exposure varied by jurisdiction (range: 15%– 38%). A review of US CDC and US FDA alerts and New York City data indicates that these types of lead-containing products are often sourced internationally, with many hand carried into the United States during travel. Based on surveillance data, we believe that US immigrant and refugee communities are at an increased risk for lead exposures associated with these products. To engage health authorities, there is a need for evidentiary data. We recommend implementing a national product surveillance database systematically tracking data on consumer products tested by childhood lead poisoning prevention programs. The data repository should be centralized and accessible to all global stakeholders, including researchers and governmental and nongovernmental agencies, who can use these data to inform investigations. Effectively identifying and addressing the availability of lead-containing consumer products at their source can focus resources on primary prevention, reducing lead exposures for users abroad and in the United States. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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30. Embedded Tutoring in California Community Colleges: Perspectives from the Field on a Promising Practice. EdWorkingPaper No. 24-984
- Author
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Annenberg Institute for School Reform at Brown University, Mark Duffy, and Kri Burkander
- Abstract
Drawing on qualitative data collected in a sample of colleges as part of a larger study on the implementation and impact of Assembly Bill 705 in California, this paper explores the rollout of corequisite reforms, focusing on the use of embedded tutors in introductory math and English courses as a strategy to meet to the needs of students. This paper highlights promising practices identified through extant research and fieldwork at study institutions, provides additional evidence on the value of the reform, discusses challenges, and makes recommendations for the field.
- Published
- 2024
31. The good, the bad, and the future: Systematic review identifies best use of biomass to meet air quality and climate policies in California.
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Freer‐Smith, Peter, Bailey‐Bale, Jack H., Donnison, Caspar L., and Taylor, Gail
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FOREST biomass ,GOVERNMENT policy on climate change ,BIOMASS ,BIOMASS production ,GREENHOUSE gases ,AIR quality - Abstract
California has large and diverse biomass resources and provides a pertinent example of how biomass use is changing and needs to change, in the face of climate mitigation policies. As in other areas of the world, California needs to optimize its use of biomass and waste to meet environmental and socioeconomic objectives. We used a systematic review to assess biomass use pathways in California and the associated impacts on climate and air quality. Biomass uses included the production of renewable fuels, electricity, biochar, compost, and other marketable products. For those biomass use pathways recently developed, information is available on the effects—usually beneficial—on greenhouse gas (GHG) emissions, and there is some, but less, published information on the effects on criteria pollutants. Our review identifies 34 biomass use pathways with beneficial impacts on either GHG or pollutant emissions, or both—the "good." These included combustion of forest biomass for power and conversion of livestock‐associated biomass to biogas by anaerobic digestion. The review identified 13 biomass use pathways with adverse impacts on GHG emissions, criteria pollutant emissions, or both—the "bad." Wildfires are an example of one out of eight pathways which were found to be bad for both climate and air quality, while only two biomass use pathways reduced GHG emissions relative to an identified counterfactual but had adverse air quality impacts. Issues of high interest for the "future" included land management to reduce fire risk, future policies for the dairy industries, and full life‐cycle analysis of biomass production and use. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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32. What Was the First Coin Struck from California Gold?
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Mishler, Clifford
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COINS ,GOLD ,EAGLE (Coin) ,PAPER money ,MEDALS ,COST control - Abstract
The article focuses on What Was the First Coin Struck from By Clifford Mishler California Gold. Topics discussed include the April 2022 edition of The Mint Master, the Utah Numismatic Society's monthly newsletter, continues a tradition of insightful features contributed by member Doug Nyholm, the editor and publisher for the past 100-plus issues; and this time it is an exploration of what coin was the first struck of California gold. Was it the U.S. 1848 CAL.
- Published
- 2022
33. Response of sea surface temperature to atmospheric rivers.
- Author
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Hsu, Tien-Yiao, Mazloff, Matthew R., Gille, Sarah T., Freilich, Mara A., Sun, Rui, and Cornuelle, Bruce D.
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ATMOSPHERIC rivers ,ATMOSPHERIC temperature ,EXTREME weather ,OCEAN dynamics ,WEATHER ,OCEAN temperature - Abstract
Atmospheric rivers (ARs), responsible for extreme weather conditions, are mid-latitude systems that can cause significant damage to coastal areas. While forecasting ARs beyond two weeks remains a challenge, past research suggests potential benefits may come from properly accounting for the changes in sea surface temperature (SST) through air–sea interactions. In this paper, we investigate the impact of ARs on SST over the North Pacific by analyzing 25 years of ocean reanalysis data using an SST budget equation. We show that in the region of strong ocean modification, ocean dynamics can offset over 100% of the anomalous SST warming that would otherwise arise from atmospheric forcing. Among all ocean processes, ageostrophic advection and vertical mixing (diffusion and entrainment) are the most important factors in modifying the SST tendency response. The SST tendency response to ARs varies spatially. For example, in coastal California, the driver of enhanced SST warming is the reduction in ageostrophic advection due to anomalous southerly winds. Moreover, there is a large region where the SST shows a warming response to ARs due to the overall reduction in the total clouds and subsequent increase in total incoming shortwave radiation. Strong air-sea interactions during atmospheric rivers often lead to modest upper ocean heat changes. The authors show that interior ocean dynamics are compensating for these air-sea exchanges. These findings can help improve subseasonal forecasts. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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34. Investigating the Strength and Microstructure of Cemented Sand–Gravel Mixtures Subjected to Freeze–Thaw Cycles.
- Author
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Estekanchi, Vahid and Aghajani, Hamed Farshbaf
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FREEZE-thaw cycles ,MICROSTRUCTURE ,COLD regions ,MIXTURES ,SOIL mechanics ,COMPRESSIVE strength - Abstract
For evaluating the resistance performance of cement-stabilized soils in cold regions, the variation of the strength of the cemented sand–gravel (CSG) mixture concerning the hydration process should be explored. This paper aims to study the effect of freeze–thaw (F–T) cycles on the strength and microstructure of a CSG mixture with 10% cement that is subjected to 12 cycles of freezing at a temperature of −23°C for 24 h and then melted at room temperature of 24°C for the next 24 h. The uniaxial compressive strength (UCS), California bearing ratio (CBR), and weight volume loss of the samples were measured after individual F–T cycles. Furthermore, the change in the microstructure of the CSG mixture in various F–T cycles was explored. The results showed a considerable reduction in the UCS up to Cycle 3, then a slight increase for Cycles 3–6, and finally a gradual decrease for further cycles. However, the CBR and weight loss slightly fluctuated up to Cycle 6, and then gradually decreased for subsequent cycles. The majority of compounds of hydrated cement were damaged in the first three cycles. In the following cycles, between Cycles 3 and 6, the portlandite compound was dissolved and recrystallized within the microvoids. Depending on the environmental conditions, carbonation may be generated from the hydrated cement fraction, which fills the microvoids and improves the strength and structure of the mixture. During further cycles after the sixth cycle, the mechanical action of the ice lenses coupled with the disintegration of the hydrate compounds imposed many new microvoids and cracks with considerable length and width, which intensified the strength reduction of the moisture and weakened the adhesion between grains. Since cement is widely used in pavement and dam engineering for stabilizing soils, the durability of cemented soils is of prime concern. This study may help improve the durability and resistance of cemented soils in cold climates. The F–T action not only influences the macrostructure of cement-stabilized soils by imposing a wide crack and ice lens but also induces a considerable change in the complexes existing in the hydrated cement paste of the mixture. Three patterns govern the change of the mixture microstructure in various F–T cycles that correspond to the observed trend in strength. The mentioned trend for the microstructure change and, consequently, the strength variation of the CSG mixture are associated with many factors such as pH, cement content, CO
2 content, moisture content within the mixture, and relative humidity within the environment. Accordingly, the pattern of microstructural changes in the CSG mixture after the middle F–T cycles may vary depending on environmental conditions. [ABSTRACT FROM AUTHOR]- Published
- 2024
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35. Drought influences habitat associations and abundances of birds in California's Central Valley.
- Author
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Goldstein, Benjamin R., Furnas, Brett J., Calhoun, Kendall L., Larsen, Ashley E., Karp, Daniel S., and de Valpine, Perry
- Subjects
DROUGHT management ,DROUGHTS ,HABITATS ,WATER supply ,AGRICULTURE ,FARMS ,ECOLOGICAL niche - Abstract
Aim: As climate change increases the frequency and severity of droughts in many regions, conservation during drought is becoming a major challenge for ecologists. Droughts are multidimensional climate events whose impacts may be moderated by changes in temperature, water availability or food availability, or some combination of these. Simultaneously, other stressors such as extensive anthropogenic landscape modification may synergize with drought. Useful observational models for guiding conservation decision‐making during drought require multidimensional, dynamic representations to disentangle possible drought impacts, and consequently, they will require large, highly resolved data sets. In this paper, we develop a two‐stage predictive framework for assessing how drought impacts vary with species, habitats and climate pathways. Location: Central Valley, California, USA. Methods: We used a two‐stage counterfactual analysis combining predictive linear mixed models and N‐mixture models to characterize the multidimensional impacts of drought on 66 bird species. We analysed counts from the eBird participatory science data set between 2010 and 2019 and produced species‐ and habitat‐specific estimates of the impact of drought on relative abundance. Results: We found that while fewer than a quarter (16/66) of species experienced abundance declines during drought, nearly half of all species (27/66) changed their habitat associations during drought. Among species that shifted their habitat associations, the use of natural habitats declined during drought while use of developed habitat and perennial agricultural habitat increased. Main Conclusions: Our findings suggest that birds take advantage of agricultural and developed land with artificial irrigation and heat‐buffering microhabitat structure, such as in orchards or parks, to buffer drought impacts. A working lands approach that promotes biodiversity and mitigates stressors across a human‐induced water gradient will be critical for conserving birds during drought. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
36. Combining Crop and Water Decisions to Manage Groundwater Overdraft over Decadal and Longer Timescales.
- Author
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Yao, Yiqing, Lund, Jay R., and Medellín-Azuara, Josué
- Subjects
GROUNDWATER management ,GROUNDWATER ,OVERDRAFTS ,CROPS ,WATER management ,ARTIFICIAL groundwater recharge ,GROUNDWATER recharge - Abstract
Coordinating management of groundwater, surface water, and irrigated crops is fundamental economically for many arid and semi-arid regions. This paper examines conjunctive water management for agriculture using hydro-economic optimization modeling. The analysis is integrated across two timescales: a two-stage stochastic decadal model for managing annual and perennial crops spanning dry and wet years and a far-horizon dynamic program embedding the decadal model into a longer groundwater policy setting. The modeling loosely represents California's San Joaquin Valley and has insights for many irrigated arid and semi-arid regions relying on groundwater with variable annual hydrology. Results show how conjunctive water management can stabilize crop decisions and improve agricultural profitability across different water years by pumping more in dry years and increasing recharging groundwater in wetter years. Using groundwater as a buffer for droughts allows growing more higher-value perennial crops, which maximizes profit even with water-scarce conditions. Nevertheless, ending overdraft in basins with declining groundwater for profit-maximizing farming reduces annual crops to maintain more profitable perennial crops through droughts. Results are affected by economic discount rates and future climates. Operating and opportunity costs from forgone annual crops can reduce aquifer recharge early in regulatory periods. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
37. Miracle friends and miracle money in California: a mixed-methods experiment of social support and guaranteed income for people experiencing homelessness.
- Author
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Henwood, Benjamin F., Kim, Bo-Kyung Elizabeth, Stein, Amy, Corletto, Gisele, Suthar, Himal, Adler, Kevin F., Mazzocchi, Madeline, Ip, Julia, and Padgett, Deborah K.
- Subjects
BASIC income ,HOMELESS persons ,SOCIAL support ,MIRACLES ,HOMELESS children ,SOCIAL isolation - Abstract
Background: This paper describes the protocols for a randomized controlled trial using a parallel-group trial design that includes an intervention designed to address social isolation and loneliness among people experiencing homelessness known as Miracle Friends and an intervention that combines Miracles Friends with an economic poverty-reduction intervention known as Miracle Money. Miracle Friends pairs an unhoused person with a volunteer "phone buddy." Miracle Money provides guaranteed basic income of $750 per month for 1 year to Miracle Friends participants. The study will examine whether either intervention reduces social isolation or homelessness compared to a waitlist control group. Methods: Unhoused individuals who expressed interest in the Miracle Friends program were randomized to either receive the intervention or be placed on a waitlist for Miracle Friends. Among those randomized to receive the Miracle Friends intervention, randomization also determined whether they would be offered Miracle Money. The possibility of receiving basic income was only disclosed to study participants if they were randomly selected and participated in the Miracle Friends program. All study participants, regardless of assignment, were surveyed every 3 months for 15 months. Results: Of 760 unhoused individuals enrolled in the study, 256 were randomized to receive Miracle Friends, 267 were randomized to receive Miracle Money, and 237 were randomized to the waitlist control group. In the two intervention groups, 360 of 523 unhoused individuals were initially matched to a phone buddy. Of the 191 study participants in the Miracle Money group who had been initially matched to a volunteer phone buddy, 103 were deemed to be participating in the program and began receiving monthly income. Discussion: This randomized controlled trial will determine whether innovative interventions involving volunteer phone support and basic income reduce social isolation and improve housing outcomes for people experiencing homelessness. Although we enrolled unhoused individuals who initially expressed interest in the Miracle Friends program, the study team could not reach approximately 30% of individuals referred to the study. This may reflect the general lack of stability in the lives of people who are unhoused or limitations in the appeal of such a program to some portion of the unhoused population. Trial registration: ClinicalTrials.gov NCT05408884 (first submitted on May 26, 2022). [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
38. Evidence for Reductions in Physical and Chemical Plant Defense Traits in Island Flora.
- Author
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Freedman, Micah G., Long, Randall W., Ramírez, Santiago R., and Strauss, Sharon Y.
- Subjects
PLANT chemical defenses ,CHEMICAL plants ,ISLAND plants ,CHEMICAL reduction ,SHRUBS ,LEAF area ,PERENNIALS ,ORNAMENTAL plants - Abstract
Reduced defense against large herbivores has been suggested to be part of the "island syndrome" in plants. However, empirical evidence for this pattern is mixed. In this paper, we present two studies that compare putative physical and chemical defense traits from plants on the California Channel Islands and nearby mainland based on sampling of both field and common garden plants. In the first study, we focus on five pairs of woody shrubs from three island and three mainland locations and find evidence for increased leaf area, decreased marginal leaf spines, and decreased concentrations of cyanogenic glycosides in island plants. We observed similar increases in leaf area and decreases in defense traits when comparing island and mainland genotypes grown together in botanic gardens, suggesting that trait differences are not solely driven by abiotic differences between island and mainland sites. In the second study, we conducted a common garden experiment with a perennial herb—Stachys bullata (Lamiaceae)—collected from two island and four mainland locations. Compared to their mainland relatives, island genotypes show highly reduced glandular trichomes and a nearly 100-fold reduction in mono- and sesquiterpene compounds from leaf surfaces. Island genotypes also had significantly higher specific leaf area, somewhat lower rates of gas exchange, and greater aboveground biomass than mainland genotypes across two years of study, potentially reflecting a broader shift in growth habit. Together, our results provide evidence for reduced expression of putative defense traits in island plants, though these results may reflect adaptation to both biotic (i.e., the historical absence of large herbivores) and climatic conditions on islands. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
39. "You Don't Know If It's the Truth or a Lie": Exploring Human Papillomavirus (HPV) Vaccine Hesitancy among Communities with Low HPV Vaccine Uptake in Northern California.
- Author
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Dang, Julie H. T., Gori, Alexandra, Rios, Lucy, Rolon, Angelica M., Zhang, Jingwen, and Chen Jr., Moon S.
- Subjects
VACCINE hesitancy ,HUMAN papillomavirus vaccines ,HUMAN papillomavirus ,VACCINATION status ,VACCINATION coverage - Abstract
Background: Vaccine hesitancy, delaying or refusing to vaccinate despite the availability of vaccines, impedes the progress of achieving optimal HPV vaccine coverage. Little is known about the sources of human papillomavirus (HPV) vaccine hesitancy among racially/ethnically and geographically diverse communities. The purpose of this paper is to explore HPV vaccine hesitancy among rural, Slavic, and Latino communities that reside in counties with low HPV vaccine uptake rates. Methods: Key informant interviews and focus groups were conducted with rural, Slavic, and Latino communities that reside within counties in California that have low HPV vaccine up to date rates (16–25%). Qualitative data were transcribed verbatim and analyzed using inductive and deductive thematic analysis. Results: A total of seven focus groups and 14 key informant interviews were conducted with 39 individuals from seven California counties. Salient themes that contributed to HPV vaccine hesitancy included the following: social media and the anti-vaccination movement; a strong belief in acquiring immunity naturally; prior vaccine experiences; and vaccine timing concerns. Participants suggested the provision of culturally appropriate, in-language, in-person easy to understand HPV vaccine education to mitigate HPV vaccine hesitancy. Conclusions: Our findings can inform future interventions to increase HPV vaccine uptake among hesitant communities. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
40. Building a Vision Transformer-Based Damage Severity Classifier with Ground-Level Imagery of Homes Affected by California Wildfires.
- Author
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Luo, Kevin and Lian, Ie-bin
- Subjects
CALIFORNIA wildfires ,TRANSFORMER models ,CLASSIFICATION algorithms ,WILDFIRE prevention ,ARTIFICIAL intelligence ,WEB-based user interfaces - Abstract
The increase in both the frequency and magnitude of natural disasters, coupled with recent advancements in artificial intelligence, has introduced prospects for investigating the potential of new technologies to facilitate disaster response processes. Preliminary Damage Assessment (PDA), a labor-intensive procedure necessitating manual examination of residential structures to ascertain post-disaster damage severity, stands to significantly benefit from the integration of computer vision-based classification algorithms, promising efficiency gains and heightened accuracy. Our paper proposes a Vision Transformer (ViT)-based model for classifying damage severity, achieving an accuracy rate of 95%. Notably, our model, trained on a repository of over 18,000 ground-level images of homes with damage severity annotated by damage assessment professionals during the 2020–2022 California wildfires, represents a novel application of ViT technology within this domain. Furthermore, we have open sourced this dataset—the first of its kind and scale—to be used by the research community. Additionally, we have developed a publicly accessible web application prototype built on this classification algorithm, which we have demonstrated to disaster management practitioners and received feedback on. Hence, our contribution to the literature encompasses the provision of a novel imagery dataset, an applied framework from field professionals, and a damage severity classification model with high accuracy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
41. Ecology and Conservation Status of Morro Manzanita Arctostaphylos morroensis: A Threatened Plant Endemic to Los Osos, San Luis Obispo County, California.
- Author
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Tyler, Claudia M. and Kofron, Christopher P.
- Subjects
ENDANGERED plants ,PLANT conservation ,ENDEMIC plants ,PUBLIC land management ,ENDANGERED species ,WILDLIFE conservation ,POPULATION viability analysis ,PLANT ecology - Abstract
Morro manzanita Arctostaphyos morroensis (Ericaceae) is a long-lived, shrub endemic to San Luis Obispo County, southern California, USA. It was listed as threatened under the U.S. Endangered Species Act in 1994, with identified threats being residential and urban development, including lack of protection on private land and lack of management on public lands, competition with invasive non-native plants, and risks of extinction associated with small and isolated populations. Our goal in this paper is to summarize and supplement the current knowledge of Morro manzanita. We review the literature on the species' description, reproductive ecology, germination cues, short-term response to fire. and distribution. We conducted field surveys to report on long-term response to fire, resampling the previously studied prescribed burn site 25 yr post-fire. Finally, we summarize the current land management of sites that support Morro manzanita and threats faced by this species. We conclude with specific recommendations for management and future study towards supporting conservation of this species and its maritime chaparral community. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
42. Probabilistic Seismic Hazard Analysis of a Back Propagation Neural Network Predicting the Peak Ground Acceleration.
- Author
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Guo, Xin, Li, Hongnan, Zhang, Hao, Wang, Qi, and Xu, Jiran
- Subjects
EARTHQUAKE hazard analysis ,BACK propagation ,GROUND motion ,DISTRIBUTION (Probability theory) ,EARTHQUAKE zones ,HELMETS - Abstract
Probabilistic seismic hazard analysis (PSHA) has been recognized as a reasonable method for quantifying seismic threats. Traditionally, this method ignores the effect of the focal depth, in which the ground motion prediction equations (GMPEs) are applied to estimate the probability distribution associated with the possible motion levels induced by the site earthquakes, but it is limited by the unclear geological conditions, which makes it difficult to provide a uniform equation, and these equations cannot express the non-linear relationship under geological conditions. Hence, this paper proposed a method to consider the seismic focal depth for the PSHA with the example of California and used a back propagation neural network (BPNN) to predict the peak ground acceleration (PGA) instead of the GMPEs. Firstly, the measured PGA and unknown PGA seismic data applicable to this method were collected separately. Secondly, the unknown PGA data were supplemented by applying the BPNN based on the measured PGA data. Lastly, based on the full-probability equation, PSHA considering the focal depth was completed and compared with the current California seismic zoning results. The results showed that using the BPNN in the PSHA can ensure computational accuracy and universality, making it more suitable for regions with unclear geological structures and providing the possibility of adding other parameters to be considered for the influence of the PSHA. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
43. Lessons Learned from the Construction and Initial Performance of a Double Chip Seal over a Paving Mat Pilot Project.
- Author
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Cheng, DingXin and Lane, Lerose
- Subjects
PILOT projects ,PAVEMENTS ,TRAFFIC flow ,ASPHALT ,RUBBER - Abstract
Single chip seals are used by many agencies to maintain or preserve their roadways. While the construction and performance of single chip seals can be easily found from literature, the construction of double chip seals with and without paving fabric or paving mats is still not common. This paper investigates four double chip seal strategies used in a pilot project constructed on US 395 in Inyo County, California, by Caltrans. Within the double chip seal project limits, eight Performance Evaluation Sections (PESs) using four treatment strategies were established for detailed performance monitoring and evaluation: 1—a 3/8-inch asphalt rubber chip seal followed by a 1/4-inch PME chip seal without pavement-reinforcing fabric (PRF) or a paving mat as a control section; 2—a 3/8-inch PME chip seal over PRF, followed by a 1/4-inch PME chip seal; 3—a 3/8-inch PME chip seal over a paving mat, followed by a 1/4-inch PME chip seal; and 4—an asphalt rubber 3/8-inch chip seal over a paving mat, followed by a 1/4-inch PME chip seal. This pilot project was monitored during construction and evaluated 1 year later to help identify any construction issues and was used to improve the specifications and performance of Caltrans' chip seals. This paper presents the initial findings following construction, and the one-year performance of the pilot project and lessons learned. The findings presented were accomplished by using these four treatment strategies on a highway with a very adverse high desert climate type and high traffic volumes. Project reviews are also planned for up to seven years to determine the long-term project performance. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
44. Factors Affecting the Strength Formation Mechanism and Water Stability of Geopolymer Stabilized Phosphogypsum in Road Construction.
- Author
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Wu, Yi, Zhang, Hanbin, Lin, Haikun, Wu, Xueting, Li, Heng, Liu, Yamei, Gu, Gonghui, Xu, Jin, Chen, Shengying, Tang, Haojun, He, Hualuo, Zheng, Wenkai, and Xu, Fang
- Subjects
PHOSPHOGYPSUM ,ROAD construction ,WATER immersion ,SHEAR strength ,STRENGTH of materials ,PORTLAND cement ,TEMPERATURE inversions - Abstract
By adjusting the content of geopolymer in geopolymer stabilized phosphogypsum (GSP) as roadbed filler, along with the mixing ratio, this paper mainly explores tendencies in the mechanical properties and water stability of GSP. This research is based on macro-mechanical properties such as unconfined compressive strength, resilience modulus, California bearing ratio and shear strength. It is also based on water stability tests, such as the water soaking test, dry and wet cycle test and expansion test, to explore changes in water stability. As for the durability of GSP, this paper is mainly based on the realization of a long time observation of mechanical properties and water stability. In the existing research, most of the stabilized phosphogypsum (PG) base material or roadbed filler consists of cement, lime, etc. In this paper, a new exploration is carried out on the composition of stabilized PG material, realized without the participation of cement. The 28 d compressive strength of GSP reaches 2.5 MPa, and over time this strength grows, which prevents the phenomenon of strength inversion that may occur in conventional cement-stabilized PG. In addition, a long-term soaking experiment was designed in this study based on the material after the strength was stabilized for up to 90 d. After the strength was steady, the GSP with the best water stability still had a softening coefficient of 80% after experiencing water immersion for 7 d. After determining the feasibility of the mechanical properties and water stability of GSP as roadbed filler, we further explored the strength formation mechanism of GSP by microscopic tests (XRD and SEM). This shows that geopolymer can stabilize PG in two main ways: one is the hydration reaction with PG to generate C-S-H gel and ettringite, and the other is to connect PG not involved in the chemical reaction to form a dense whole through generated hydration products. Geopolymer, stabilizing a high amount of PG, not only provides a new method for the consumption of PG, but also has more stable performance than cement, and has certain advantages in economy. In addition, the advantage of this study is that good performance can be achieved by simply sieving PG and adjusting the geopolymer ratio in practical engineering projects. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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45. Framework for Risk-Targeted Performance-Based Seismic Design of Ordinary Standard Bridges.
- Author
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Deb, Angshuman, Zha, Alex L., Caamaño-Withall, Zachary A., Conte, Joel P., and Restrepo, José I.
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PERFORMANCE-based design ,EARTHQUAKE engineering ,BRIDGE foundations & piers ,STRUCTURAL design ,RISK assessment ,EARTHQUAKE resistant design ,DECISION making ,PIERS - Abstract
This paper presents the analytical formulation and computational implementation of a conceptual probabilistic performance-based seismic design (PBSD) framework for ordinary standard bridge (OSB) structures. An updated probabilistic performance-based earthquake engineering (PBEE) assessment methodology is used for the parametric performance assessment of four distinct OSBs in California to investigate the effects of varying key structural design parameters over a primary design parameter space on risk-based structural performance measures. The dire need for a systematic PBSD framework for OSBs is illustrated given the significant variability in risk-based performance levels exhibited by these traditionally designed testbed OSBs. A PBSD methodology involving the design of the bridge piers is proposed wherein a risk-based feasible design domain in the primary design parameter space is identified which facilitates the risk-informed design/decision making process in the face of uncertainty. Sensitivities of risk-based feasible design domains compared with other (secondary) design variables and with the method employed for damage hazard assessment are investigated. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
46. Developmental Education Reform as a Civil Rights Agenda: Recent History & Future Directions for California. A Civil Rights Agenda for California's Next Quarter Century
- Author
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University of California, Los Angeles. Civil Rights Project / Proyecto Derechos Civiles, Susan Bickerstaff, and Tatiana Melguizo
- Abstract
Efforts to strengthen the pipeline to college degree completion have focused on improving college access and providing academic, social, and financial supports to students post-enrollment. This paper explores one facet of postsecondary education that has served as a barrier to both college access and success--developmental education--which has proven to exacerbate racial inequities in academic progress in higher education and has effectively decreased college access for low-income students and students of color. After more than a decade of trying to tackle the developmental education problem indirectly through basic skills-related initiatives, task forces, and success initiatives, the California state legislature passed Assembly Bill 705 (AB705) in 2017, which directed colleges to replace standardized placement tests with multiple measures of high school performance to determine college readiness. In this paper, the authors describe the research that prompted developmental education reform approaches nationally and in California, describe the efforts in California that led to the passing of AB705, and summarize research on its implementation and outcomes. Building on analysis of the research, the paper concludes with five key practice and policy recommendations for California community college leaders as they move toward realizing a civil rights agenda for college access and success in the next 25 years: (1) Address faculty and practitioners' beliefs; (2) Move from structural to instructional reform; (3) Improve data accessibility, reporting, and accountability; (4) Expand equitable college access opportunities for students in high school; and (5) Address barriers facing English learners.
- Published
- 2024
47. Threshold Concepts in Quantitative Reasoning
- Author
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Judith Canner and Jennifer E. Clinkenbeard
- Abstract
The idea of "threshold concepts" has been used to identify discipline-based concepts that are critical to that academic area. Threshold concepts are often difficult for students to assimilate in a meaningful way but, once done, can be powerful for the learner. In general, threshold concepts are 1) transformative to learner thinking; 2) bounded by the discipline; 3) integrative with other concepts; and 4) irreversible once understood (Meyer and Land 2003). This paper presents five threshold concepts in quantitative reasoning (QR) developed by transdisciplinary faculty workgroups that may be applicable for non-mathematics disciplines as well. They are as follows: 1) QR is an iterative process; 2) Abstract patterns can represent relationships between variables or objects; 3) There is a bidirectional translation between the concrete and the abstract; 4) Effective comparison depends on proportional reasoning; and 5) Different visual representations can communicate varying perspectives on the same quantitative information. The purpose of this paper is twofold: to explore and justify the proposed concepts as threshold concepts in QR-based courses and to offer practical examples which might assist students in developing and understanding these proposed threshold concepts.
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- 2024
48. Investigating the impacts of autonomous vehicles on crash severity and traffic safety.
- Author
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Almaskati, Deema, Kermanshachi, Sharareh, Pamidimukkala, Apurva, Hamarat, Mehmet, and Dindar, Serdar
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TRAFFIC safety ,AUTONOMOUS vehicles ,TRAFFIC accidents ,LITERATURE reviews ,PUBLIC health ,ETHICAL problems ,PUBLIC opinion - Abstract
Traffic accidents are a nationwide public health concern, but autonomous vehicles (AVs) have the potential to significantly reduce accident severity and frequency by eliminating their most common cause, human error. By analyzing the data published by California's Department of Motor Vehicles, researchers have identified the factors that influence AV crash severity, however, none do so through a literature review. This paper's aims are multi-faceted: to understand AVs' operation on public roadways by identifying and classifying the factors contributing to accident severity, to develop a list of strategies that address the public's safety concerns, and to acknowledge the ethics of unavoidable collisions. To fulfill these objectives, a comprehensive literature review was conducted based on a keyword search. Following a multi-step screening and exclusion process, detailed review was performed of 107 relevant publications, and the factors contributing to increased crash severity were classified into 14 categories. The literature revealed that AVs are not at fault in most accidents, although they have a higher propensity than conventional cars to be involved in rear-end collisions, and they are specifically designed to minimize the number of accidents, but may face unavoidable ones. For the benefit of policymakers and manufacturers, 11 strategies that address the moral dilemma of these accidents and 7 strategies that address concerns about AV safety to improve public perception were identified. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
49. Third-Generation Heritage Spanish Acquisition and Socialization: Word Learning and Overheard Input in an L.A.-Based Mexican Family.
- Author
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Alvarez, Eric and Morgenstern, Aliyah
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SPANISH language ,SPEECH ,LANGUAGE acquisition ,BILINGUALISM ,SPANIARDS ,SOCIALIZATION ,EYE drops - Abstract
This case study examines overheard speech in a third-generation heritage Spanish Mexican family. It presents Spanish use longitudinally and describes overheard Spanish word use in interaction. Transcribed on CLAN to create a plurilingual corpus, ethnographic video data consisted of 24 h across three sampling periods, yielding nearly 30,000 Spanish, English, and language mixed utterances. Quantitative analyses indicate strong Spanish use in the first sample, before dropping. Qualitative descriptions show the third-generation target-child's attunement to overheard Spanish, and her agency to use Spanish. Overheard input helps her use Spanish words, influencing her social encounters. This paper examines what we coded as overheard input in heritage language acquisition and socialization research. The language practices of one multigenerational Mexican family in California are explored, accounting for how their language practices in multiparty interaction co-create meaning, and how they help a third-generation child use Spanish words grounded in daily experiences. The findings contribute to the discussion of bilingualism in general and definitions of heritage bilingualism in particular. The results underscore the understudied role of overhead speech produced by a diversity of multigenerational family members and word learning. Participation frameworks are dynamically constructed by all participants as permeable, inclusive, and engage the children's use of inherited bilingual and bicultural practices, suggesting that heritage bilingualism is not just about abstract grammar. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
50. Documentation of prenatal contraceptive counseling and fulfillment of permanent contraception: a retrospective cohort study.
- Author
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Viswanathan, Ambika V., Berg, Kristen A., Bullington, Brooke W., Miller, Emily S., Boozer, Margaret, Serna, Tania, Bailit, Jennifer L., and Arora, Kavita Shah
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CONTRACEPTION ,STATISTICS ,COUNSELING ,CONFIDENCE intervals ,MULTIVARIATE analysis ,MULTIPLE regression analysis ,AGE distribution ,RETROSPECTIVE studies ,GESTATIONAL age ,RACE ,DOCUMENTATION ,T-test (Statistics) ,PUERPERIUM ,HEALTH insurance ,PARITY (Obstetrics) ,CHI-squared test ,DESCRIPTIVE statistics ,RESEARCH funding ,PRENATAL care ,MARITAL status ,BODY mass index ,ODDS ratio ,DATA analysis software ,LONGITUDINAL method ,SECONDARY analysis ,INSURANCE - Abstract
Background: Barriers exist for the provision of surgery for permanent contraception in the postpartum period. Prenatal counseling has been associated with increased rates of fulfillment of desired postpartum contraception in general, although it is unclear if there is impact on permanent contraception specifically. Thus, we aimed to investigate the association between initial timing for prenatal documentation of a contraceptive plan for permanent contraception and fulfillment of postpartum contraception for those receiving counseling. Methods: This is a planned secondary analysis of a multi-site cohort study of patients with documented desire for permanent contraception at the time of delivery at four hospitals located in Alabama, California, Illinois, and Ohio over a two-year study period. Our primary exposure was initial timing of documented plan for contraception (first, second, or third trimester, or during delivery hospitalization). We used univariate and multivariable logistic regression to analyze fulfillment of permanent contraception before hospital discharge, within 42 days of delivery, and within 365 days of delivery between patients with a documented plan for permanent contraception in the first or second trimester compared to the third trimester. Covariates included insurance status, age, parity, gestational age, mode of delivery, adequacy of prenatal care, race, ethnicity, marital status, and body mass index. Results: Of the 3103 patients with a documented expressed desire for permanent contraception at the time of delivery, 2083 (69.1%) had a documented plan for postpartum permanent contraception prenatally. After adjusting for covariates, patients with initial documented plan for permanent contraception in the first or second trimester had a higher odds of fulfillment by discharge (aOR 1.57, 95% C.I 1.24–2.00), 42 days (aOR 1.51, 95% C.I 1.20–1.91), and 365 days (aOR 1.40, 95% C.I 1.11–1.75), compared to patients who had their first documented plan in the third trimester. Conclusions: Patients who had a documented prenatal plan for permanent contraception in trimester one and two experienced higher likelihood of permanent contraception fulfillment compared to those with documentation in trimester three. Given the barriers to accessing permanent contraception, it is imperative that comprehensive, patient-centered counseling and documentation regarding future reproductive goals begin early prenatally. Plain language summary: Permanent contraception is a highly desired form of postpartum contraception in the United States, however there are several barriers to accessing it. In this paper, we investigate whether the timing of when a patient has a documented plan for postpartum contraception has an impact on if they achieve postpartum contraception. This is a cohort study from four hospitals in Illinois, Ohio, California, and Alabama for patients with a desire for postpartum permanent contraception documented in their medical record. We specifically investigated the trimester (first, second, or third) where a patient had a plan for permanent contraception first documented. We then used univariate and multivariate models to determine the relationship between the timing of a plan for permanent contraception and if a patient achieved the procedure at three time-points: hospital discharge, 42-days, and 365-days. Our findings showed that of the 3103 patients in our cohort, only 69.1% of them had a documented plan for postpartum contraception at any point before going to the hospital for their delivery admission. We additionally found that patients who had a documented plan for permanent contraception in the first or second trimester had a higher odds of receiving their postpartum contraception procedure compared to people who had their first documented plan in the third trimester. This showed us the importance of earlier counseling regarding contraception for pregnant patients. There are many barriers to accessing postpartum contraception, so having patient focused counseling about future goals around reproductive health early on in pregnancy is critical. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
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