22,306 research outputs found

    Time-varying STARMA models by wavelets

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    The spatio-temporal autoregressive moving average (STARMA) model is frequently used in several studies of multivariate time series data, where the assumption of stationarity is important, but it is not always guaranteed in practice. One way to proceed is to consider locally stationary processes. In this paper we propose a time-varying spatio-temporal autoregressive and moving average (tvSTARMA) modelling based on the locally stationarity assumption. The time-varying parameters are expanded as linear combinations of wavelet bases and procedures are proposed to estimate the coefficients. Some simulations and an application to historical daily precipitation records of Midwestern states of the USA are illustrated

    Annotated Checklist of the Aradidae (Hemiptera: Heteroptera) or Flat Bugs of Iowa

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    A review of the species of Aradidae or flat bugs found in Iowa is presented. New state records for Aradus aequalis Say, A. crenatus Say, A. implanus, and Mezira lobata (Say) are included

    Examining the Cyber Skills Gap: An Analysis of Cybersecurity Positions by Sub-Field

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    While demand for cybersecurity professionals is high, the field is currently facing a workforce shortage and a skills gap. Thus, an examination of current cybersecurity position hiring requirements may be advantageous for helping to close the skills gap. This work examines the education, professional experience, industry certification, security clearance, and programming skill requirements of 935 cybersecurity positions categorized by sub-field. The nine sub-fields are: architecture, auditing, education, GRC (governance, risk, and compliance), management, operations, penetration testing, software security, and threat intelligence / research. Prior work experience and higher education degrees in technical fields were found to be frequently required across all sub-fields. Over 48% of positions listed an industry cybersecurity certification, while 19% of positions required a security clearance. In addition, 25% of positions listed knowledge of a programming language as a requirement for employment. There were notable differences in certain position requirements between sub-fields. On average, management positions required three years of additional work experience than positions in the auditing, operations, and penetration testing sub-fields. Security clearance requirements were relatively similar across all other sub-fields, with the GRC sub-field having the highest percentage of positions requiring a security clearance. Programming skills were desired most prevalently in positions within the architecture, software security, and penetration testing sub-fields. Demand for industry certifications varied by sub-field, although the Certified Information Systems Security Professional (CISSP) certification was the most frequently desired certification. Cybersecurity education programs should consider the diverse nature of the cybersecurity field and develop pathways to prepare future cybersecurity professionals for success in any sub-field

    Promoting Psychophysiological Play: Applying Principles of Polyvagal Theory in the Rehearsal Room

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    Actors are often asked by directors to "play" with the material they are given in an attempt to create new artistic choices free of inhibitions. While proposed with no ill-intent, this request has the potential to create unwanted activations of an actor's sympathetic nervous system due to the removal of familiar rehearsal practices. Removing this ask from a director's vocabulary lessens the chance of negative interactions with an actor’s boundaries, but may leave other members of the creative team and actors may be left wanting more. By creating theatrical play grounded in the principles of Dr. Stephen W. Porges' Polyvagal Theory, potential trauma responses can be accounted for while allowing for an artistically fulfilling and consensual rehearsal process

    Feeding Diversity of Finfish in Different Wild Habitat

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    Sonmiani Bay has unique faunal diversity and distribution especially finfish as mangroves provides an imperative ecosystem which offer the shelter and protection to the associated organisms and care of their juveniles in bay limits. This study aimed to evaluate the diversity pattern according to physical and physiological responses and feeding habits (carnivorous and herbivorous) of finfish species in accordance with current habitat conditions in the Sonmiani Bay. A total of 4499, individuals of comprising 155 finfish species that represent 50 families were captured by these four (beach seines, purse seines, gill nets, and cast nets) nets during a twelve-month survey in a year. The distribution pattern of finfishes captured classified into four groups (tidal visitors, permanent residents, partial residents, and seasonal visitors) according to their patterns of distribution. Understanding of the true feeding behavior of organisms needs a more reliable and functional approach. The feeding ecology is not only functional for food and feeding behavior of fish as usually described by various tools and techniques of analytical research to take up more reliable details to explain the feeding biology in fish but also the indicator of habitat quality and status

    Exploring Potential Domains of Agroecological Transformation in the United States

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    There is now substantial evidence that agroecology constitutes a necessary pathway towards socially just and ecologically resilient agrifood systems. In the United States, however, agroecology remains relegated to the margins of research and policy spaces. This dissertation explores three potential domains of agroecological transformation in the US. Domains of transformation are sites of contestation in which agroecology interfaces with the industrial agrifood system; these material and conceptual spaces may point to important pathways for scaling agroecology. To explore this concept, I examine formal agroecology education (Chapter 1), extension services and statewide discourses around soil health (Chapter 2), and models of farmland access not based on private property (Chapter 3). While these constitute three distinct topics, I seek to demonstrate that they are linked by similar forces that enable and constrain the extent to which these domains can be sites of agroecological transformation. First, I use case study methodology to explore the evolution of an advanced undergraduate agroecology course at the University of Vermont. I examine how course content and pedagogy align with a transformative framing of agroecology as inherently transdisciplinary, participatory, action-oriented, and political. I find that student-centered pedagogies and experiential education on farms successfully promote transformative learning whereby students shift their understanding of agrifood systems and their role(s) within them. In my second chapter, I zoom out to consider soil health discourses amongst farmers and extension professionals in Vermont. Using co-created mental models and participatory analysis, I find that a singular notion of soil health based on biological, chemical, and physical properties fails to capture the diverse ways in which farmers and extension professionals understand soil health. I advocate for a principles-based approach to soil health that includes social factors and may provide a valuable heuristic for mobilizing knowledge towards agroecology transition pathways. My third chapter, conducted in collaboration with the national non-profit organization Agrarian Trust, considers equitable farmland access. Through semi-structured interviews with 13 farmers and growers across the US, I explore both farmer motivations for engaging with alternative land access models (ALAMs) and the potential role(s) these models may play within broader transformation processes. I argue that ALAMs constitute material and conceptual ‘third spaces’ within which the private property regime is challenged and new identities and language around land ownership can emerge; as such, ALAMs may facilitate a (re)imagining of land-based social-ecological relationships. I conclude the dissertation by identifying conceptual and practical linkages across the domains explored in Chapters 1-3. I pay particular attention to processes that challenge neoliberal logics, enact plural ways of knowing, and prefigure just futures. In considering these concepts, I apply an expansive notion of pedagogy to explore how processes of teaching and (un)learning can contribute to cultivating foundational capacities for transition processes

    Spiritual connectedness through prayer as a mediator of the relationship between Indigenous language use and positive mental health

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    Objective: The objective of this study is to understand how Indigenous language and spirituality revitalization efforts may affect mental health within Indigenous communities. Although Indigenous communities experience disproportionate rates of mental health problems, research supporting language and spirituality’s role in improving mental health is under-researched and poorly understood. Method: Data for this study are from a Community-based Participatory Research Project involving five Anishinaabe tribes in Minnesota and Wisconsin. Participants were sampled from clinic records of adults with a diagnosis of type 2 diabetes, living on or near the reservation, and self-identifying as American Indian (mean age = 46.3; n = 191). Result: Structural equation modeling illustrates that language use in the home is associated with positive mental health through spiritual connectedness. Conclusion: Results support tribal community expressions of the positive effects of cultural involvement for Indigenous wellbeing, and improve what is known about the interconnectedness of language and spirituality.Sociolog

    Munson Hall

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