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Digital Competencies for the Liberal Arts
Get PDFThis lightning round presentation discusses the Digital Competencies Initiative at Bryn Mawr College
Experiential Learning with Digital Technology: Virtual Reality and Russian Prefixed Verbs of Motion
No full textThis presentation outlines an innovative method for integrating virtual reality into the Russian language classroom. Specifically, we discuss the development of a prototype of an interactive immersive world to train Russian prefixed verbs of motion. Our program, “A Stroll through Brighton”, a virtual reality game set in Brighton Beach NY that trains students in prefixed verbs of motion, serves as a case study. The game, based on recent developments in the fields of virtual reality and game-based learning, allows users to virtually immerse themselves in and interact with real, not simulated, locations for educational purposes
Teaching Immersive Video Storytelling: Tips for Getting Started
Get PDFThis session will discuss the challenges and opportunities of teaching 360-degree video storytelling, as well as the layers of collaboration and institutional support that made this new initiative possible at Temple University. The presenters represent faculty and library staff members involved in the first year of the Innovative Teaching with Makerspace Grant (co-sponsored by the Digital Scholarship Center and Center for the Advancement of Teaching) and will focus on the practical considerations of integrating this new technology in the classroom, as well as the logistical and financial assistance necessary for its implementation across campus
Two Sides of the Same Coin: A University and Student Union Perspective on Partnership and Risk
Get PDFGlobal-change effects on early-stage decomposition processes in tidal wetlands – implications from a global survey using standardized litter
Get PDFTidal wetlands, such as tidal marshes and mangroves, are hotspots for carbon sequestration. The preservation of organic matter (OM) is a critical process by which tidal wetlands exert influence over the global carbon cycle and at the same time gain elevation to keep pace with sea-level rise (SLR). The present study assessed the effects of temperature and relative sea level on the decomposition rate and stabilization of OM in tidal wetlands worldwide, utilizing commercially available standardized litter. While effects on decomposition rate per se were minor, we show strong negative effects of temperature and relative sea level on stabilization, as based on the fraction of labile, rapidly hydrolyzable OM that becomes stabilized during deployment. Across study sites, OM stabilization was 29% lower in low, more frequently flooded vs. high, less frequently flooded zones. Stabilization declined by ∼ 75% over the studied temperature gradient from 10.9 to 28.5°C. Additionally, data from the Plum Island long-term ecological research site in Massachusetts, USA, show a pronounced reduction in OM stabilization by \u3e 70% in response to simulated coastal eutrophication, confirming the potentially high sensitivity of OM stabilization to global change. We therefore provide evidence that rising temperature, accelerated SLR, and coastal eutrophication may decrease the future capacity of tidal wetlands to sequester carbon by affecting the initial transformations of recent OM inputs to soil OM
A New Proof of the Existence of Embedded Surfaces with Anosov Geodesic Flow
Get PDFWe give a new proof of the existence of compact surfaces embedded in ℝ3 with Anosov geodesic flows. This proof starts with a noncompact model surface whose geodesic flow is shown to be Anosov using a uniformly strictly invariant cone condition. Using a sequence of explicit maps based on the standard torus embedding, we produce compact embedded surfaces that can be seen as small perturbations of the Anosov model system and hence are themselves Anosov
Immersed Lagrangian Fillings of Legendrian Submanifolds via Generating Families
Get PDFWhen a Legendrian sub manifold admits a generating family (GF), Sabloff and Traynor proved that there is an isomorphism between the GF-cohomology groups of the Legendrian and the cohomology groups of any GF-compatible embedded Lagrangian filling. In this paper, we show that a similar isomorphism exists for immersed GF-compatible Lagrangian fillings; this imposes restrictions on the minimum number and types of double points for any such filling. We also show that from an immersed GF-cobordisms between Legendrian sub manifolds, there exists a long exact sequence relating the GF-cohomology groups of the two Legendrians and cohomology groups associated with the immersed Lagrangian. In addition, we give some constructions of immersed GF-compatible fillings
Orexin Depolarizes Central Amygdala Neurons via Orexin Receptor 1, Phospholipase C and Sodium-Calcium Exchanger and Modulates Conditioned Fear
No full textOrexins (OX), also known as hypocretins, are excitatory neuropeptides with well-described roles in regulation of wakefulness, arousal, energy homeostasis, and anxiety. An additional and recently recognized role of OX is modulation of fear responses. We studied the OX neurons of the perifornical hypothalamus (PeF) which send projections to the amygdala, a region critical in fear learning and fear expression. Within the amygdala, the highest density of OX-positive fibers was detected in the central nucleus (CeA). The specific mechanisms underlying OX neurotransmission within the CeA were explored utilizing rat brain slice electrophysiology, pharmacology, and chemogenetic stimulation. We show that OX induces postsynaptic depolarization of medial CeA neurons that is mediated by OX receptor 1 (OXR1) but not OX receptor 2 (OXR2). We further characterized the mechanism of CeA depolarization by OX as phospholipase C (PLC)- and sodium-calcium exchanger (NCX)- dependent. Selective chemogenetic stimulation of OX PeF fibers recapitulated OXR1 dependent depolarization of CeA neurons. We also observed that OXR1 activity modified presynaptic release of glutamate within the CeA. Finally, either systemic or intra-CeA perfusion of OXR1 antagonist reduced the expression of conditioned fear. Together, these data suggest the PeF-CeA orexinergic pathway can modulate conditioned fear through a signal transduction mechanism involving PLC and NCX activity and that selective OXR1 antagonism may be a putative treatment for fear-related disorders
