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COMPLEX OSCILLATORY PATTERNS IN A THREE-TIMESCALE MODEL OF A GENERALIST PREDATOR AND A SPECIALIST PREDATOR COMPETING FOR A COMMON PREY
No full textIn this paper, we develop and analyze a model that studies the interaction between a specialist predator (one that relies exclusively on a single prey species), a generalist predator (one that takes advantage of alternative food sources in addition to consuming the focal prey species), and their common prey in a two-trophic ecosystem featuring three timescales. We assume that the prey operates on a faster timescale, while the specialist and generalist predators operate on slow and superslow timescales respectively. Treating the predation efficiency of the generalist predator as the primary varying parameter and the proportion of its diet formed by the prey species under study as the secondary parameter, we obtain a host of rich and interesting dynamics, including relaxation oscillations, mixed-mode oscillations (MMOs), subcritical elliptic bursting patterns, torus canards, and mixed-type torus canards. By grouping the timescales into two classes and using the timescale separation between classes, we apply one-fast/two-slow and two-fast/one-slow analysis techniques to gain insights about the dynamics. Using the geometric properties and flows of the singular subsystems, in combination with bifurcation analysis and numerical continuation of the full system, we classify the oscillatory dynamics and discuss the transitions from one type of dynamics to the other. The types of oscillatory patterns observed in this model are novel in population models featuring three-timescales; some of which qualitatively resemble natural cycles in small mammals and insects. Furthermore, oscillatory dynamics displaying torus canards, mixed-type torus canards, and MMOs experiencing a delayed loss of stability near one of the invariant sheets of the self-intersecting critical manifold before getting attracted to the adjacent attracting sheet of the critical manifold have not been previously reported in three-timescale models
THE EARLY EOCENE FLORA OF HORSEFLY, BRITISH COLUMBIA, CANADA AND ITS PHYTOGEOGRAPHIC SIGNIFICANCE
No full textAbout forty species, including a bryophyte, ferns, conifers, Ginkgo, and over 35 angiosperms, are recognized based on compression-impression remains from the early Eocene of Horsefly, British Colombia, Canada. This flora is in the north central part of a chain of late early Eocene fossil assemblages known as floras of the “Okanagan Highlands” (= “Okanogan High-lands” in the US). These floras extend from north central British Columbia, Canada southeast to Republic, Washington, USA. The Horsefly flora shows similarities to other Eocene Okanagan Highlands floras, such as McAbee, Falkland, Thomas Ranch and Republic, but with some additional rare taxa. In the broader sense, the Horsefly flora can be compared with early and middle Eocene floras of eastern Asia and midcontinental North America, but shares fewer elements with Europe. Ginkgo, Metasequoia, Pinus, Palaeocarpinus, ulmaceous leaves and Deviacer are shared with northeastern China as well as western North American sites. Fagopsis, Macginitiea, Dipteronia, Florissantia, Sassafras and Lagokarpos also occur in other western North American Eocene floras and Koelreuteria and Jenkinsella with Eocene paleofloras of China. These comparisons demonstrate probable floristic exchange between northwestern North America and northeastern China via a Beringian route during the late early Eocene
On the Schur Lie-multiplier and Lie-covers of Leibniz n-algebras
No full textIn this article, we study the notion of central extensions of Leibniz n-algebras relative to n-Lie algebras to study properties of Schur (Formula presented.) -multiplier and (Formula presented.) -covers on Leibniz n-algebras. We provide a characterization of (Formula presented.) -perfect Leibniz n-algebras by means of universal (Formula presented.) -central extensions. It is also provided some inequalities on the dimension of the Schur (Formula presented.) -multiplier of Leibniz n-algebras. Analogue to Wiegold and Green results on groups or Moneyhun results on Lie algebras, we provide upper bounds for the dimension of the (Formula presented.) -commutator of a Leibniz n-algebra with finite dimensional (Formula presented.) -central factor, and also for the dimension of the Schur (Formula presented.) -multiplier of a finite dimensional Leibniz n-algebra
Exploring Aftercare Experiences and Well-Being after Completion of a Young Adult Addiction Treatment Program
No full textAdventure therapy (AT) interventions are being integrated with evidence-based treatment models for a variety of clients, including adolescents and young adults, for a wide range of presenting symptomology, including substance use disorders (SUD). Though some studies have explored longer term outcomes, little is known about the posttreatment experiences of clients. Clients from a 90-day AT treatment program were contacted approximately posttreatment and asked to assess their general well-being and current relationship with substance use. Results showed that clients were doing well evidenced by OQ-45 scores that were statistically similar at the discharge and follow-up period (t (92) = −1.693, p \u3c .09; Cohen’s d = −.180). Clients also showed statistically significant increases in mindfulness skills. Results also showed that 70.8% of the participants indicated that they did relapse, while 29.2% indicated they did not. Of those that relapsed, 73.8% indicated the relapse was “severe,” while 26.3% believed their relapse was “not severe.” Clients reflected favorably on their treatment experience and desired more structured aftercare opportunities posttreatment. Implications for professional practice and research include the need to advance perspectives of recovery and develop aftercare support systems that can aid clients in the recovery process
Liberal Prepping as Apocalyptic Eco-Religion
No full textThe term “prepper” or “survivalist” has long been associated with more conservative or politically right-leaning communities who have operated at the fringe of society for decades. Since the new millennium, this hobby of preparedness has increased and, most recently, shown a rise among liberal or left-leaning communities. This essay addresses the rise in liberal prepper culture not only as a political response to right-wing politics, but as a fear heightened by the realities of climate change and its impact on humanity, thus creating an eco-religion centred on ethical and moral responsibilities, with an overall apocalyptic hue
Ravana’s Kingdom: The Ramayana and Sri Lankan History from Below
No full textRavana, the demon-king antagonist from the Ramayana, the ancient Hindu epic poem, has become an unlikely cultural hero among Sinhala Buddhists over the past decade. In Ravana\u27s Kingdom, Justin W. Henry delves into the historical literary reception of the epic in Sri Lanka, charting the adaptions of its themes and characters from the 14th century onwards, as many Sri Lankan Hindus and Buddhists developed a sympathetic impression of Ravana\u27s character, and through the contemporary Ravana revival, which has resulted in the development of an alternative mythological history, depicting Ravana as king of the Sri Lanka\u27s indigenous inhabitants, a formative figure of civilizational antiquity, and the direct ancestor of the Sinhala Buddhist people. Henry offers a careful study of the literary history of the Ramayana in Sri Lanka, employing numerous sources and archives that have until now received little to no scholarly attention, as well as the 21st century revision of a narrative of the Sri Lankan people-a narrative incubated by the general public online, facilitated by social media and by the speed of travel of information in the digital age. Ravana\u27s Kingdom offers a glimpse into a centuries-old, living Ramayana tradition among Hindus and Buddhists in Sri Lanka-a case study of the myth-making process in the digital age
Flannery O’Connor’s Use of Humor
Get PDFWhat follows is John Lowe’s reading text for his 2023 NEH Summer Institute lecture for “Reconsidering Flannery O’Connor.” We thank Thadious M. Davis for doing some polishing of the text after Lowe’s passing, though there are still significant, unavoidable gaps in the article. There are, for example, no Works Cited pages. As one works with this text, one should also watch the video of Lowe’s lecture, which is available on the Flannery O’Connor Institute for the Humanities website. Click on “Events” and then on “2023 NEH Summer Institute Faculty Lectures,” and you will find, alongside the tapes of other NEH lectures, “NEH Summer Institute on Flannery O’Connor John Wharton Lowe Public Lecture.
Music therapy strategies in the music education classroom
No full texthttps://kb.gcsu.edu/cme_profdev/1019/thumbnail.jp
Moving Toward Global Feminism: Consciousness of Borders and Implementing Angry Feminism
Get PDFIn this Thesis, I argue that in order to get to global feminism, there must be a consciousness of borders, such as racism, islamophobia, sexism, etc, and there must be an implementation of angry feminism to combat patriarchal systems. In Chapter One: Moving Toward A More Global Feminism, I introduce theorists Said, Djebar, Spivak, and Mohanty, to lay the groundwork for understanding those borders. In Chapter Two: Under The Western Gaze: An Example of One Arab-American Woman\u27s Experience in the United States, I examine Laila Lalami\u27s The Other Americans and apply the theorists\u27 ideas from Chapter One: Moving Toward A More Global Feminism. In Chapter Three: Angry Feminism in the Arab World: An Inspiration for Women in the United States, I argue that feminist activists in the Arab world are making great strides toward global feminism, and their activism and implementation of what I term angry feminism can be inspirational for women living in the United States. In order to get to a more global form of feminism, borders must be transcended and anger must move to the forefront
Video-based instruction in social-emotional skills for youth with intellectual disabilities in a summer vocational rehabilitation program
Get PDFSocial-emotional skills work collaboratively with academic skills to help students connect content to real-world challenges. For successful future employment, today’s students will need to master social-emotional skills such as communication, collaboration, and problem-solving. Students with intellectual disabilities, however, possess severe deficits in mental capacity and emotional skills. For those students with intellectual disabilities, who already possess multiple employment and educational challenges; lack of social-emotional skills has been identified by their schoolto-work transition support team members as a common barrier to employment. Due to the COVID-19 pandemic, a vocational rehabilitation program for students with disabilities that would have included a face-to-face class of 40 participants was cancelled. As a substitute, a hybrid, Google Classroom-based delivery of a social-emotional skills intervention program was hosted at the computer lab of the vocational rehabilitation agency with only five student participants. Although a small group, almost all student participants increased their pro-social skills knowledge as well as were observed by their counselors to have improved their pro-social behaviors post-program. This case study provides some, but very limited, data to suggest that delivery of social-emotional learning curriculum by means of remote learning for students with intellectual disabilities should be further studied