7696 research outputs found
Sort by
Sweden, NATO, and Ukraine: How Sweden can contribute to international security as a NATO member
No full textToday the security situation in Europe is dominated by two entities: Russia, and the North Atlantic Treaty Organization (NATO). NATO was formed during the cold war in large part as a way to organize and coordinate Western European militaries with the United States to counter the Soviet Union. Since 1991, NATO has expanded into Eastern Europe, admitting former Soviet states from the Baltics to Moldova. Meanwhile, Russia under the leadership of Vladimir Putin has maintained high levels of military spending and partaken in several aggressive military actions, including the 2008 invasion of Georgia, the 2014 annexation of Crimea and subsequent ongoing support of the war in the Donbas, and most recently, the 2022 invasion of Ukraine.
In the near future, this expansion will continue to include Sweden, a country famous for its historical neutrality and support for human rights. Sweden’s entry to NATO raises many questions, from “How did such a war adverse country end up joining the world’s largest military alliance?”, to “What will Sweden bring to the NATO alliance?” to “How will such a move shape European and global security in the future?” This presentation seeks to understand Sweden’s role in the modern European Security climate, and how that role might change as it joins NATO. Topics that will be explored include Swedish military aid to Ukraine, defence spending allocation, the role of Swedish sea power and submarines, Baltic security, and Arctic security
Emotion Word Use by English Speakers: An Analysis of Speaker Status, Extraversion, and Vocabulary Size
No full textNon-native speakers of a language must learn to express their emotions in a new linguistic context. Therefore, identifying what factors support their emotion word use can uncover psychological mechanisms of emotion discourse and can inform second language pedagogy. This study investigates whether native versus non-native speaker status, extraversion, and vocabulary size influence emotion word use in English. A sample of 347 participants, 289 of whom were non-native speakers, free-wrote about how a sad personal memory made them feel. Participants then completed an assessment of their English vocabulary size and questions assessing their levels of extraversion and sociolinguistic history. Non-native speakers used marginally fewer emotion words than native speakers in their written responses. There were no relationships between extraversion or vocabulary size and emotion word use in the written responses. These results add further specificity to which factors support emotion word use by English speakers
A two-screen model of the variable scintillation of pulsar B1737+13
No full textIn this thesis, I discuss a set of observations of the pulsar B1737+13 and develop a two scattering screen model to explain the observed variability in the pulsar’s scintillation behavior. I begin by introducing the phenomenon of pulsar scintillation and the underlying physical framework behind one-dimension scattering screen models and scintillation arcs. I then discuss the methods used to analyze the observations as well as the methods of simulating two-screen scattering to compare to the observations. I then present the results of the analysis and simulations. To do this, I develop the idea of interaction arcs to characterize scattering in the two-screen model. I find that the two-screen model and interaction arcs are able to explain key features in the observed variability in the pulsar’s scintillation behavior. The explanatory power of this two-screen model provides strong evidence for the existence of two scattering screens along the line of sight to B1737+13
Imitation is the sincerest form of flattery: Vocal copying responses of bottlenose dolphins (\u3ci\u3eTursiops truncatus\u3c/i\u3e) to auditory playbacks of signature and non-signature \u3ci\u3eT. truncatus\u3c/i\u3e whistles
No full textBottlenose dolphins (Tursiops truncatus) communicate primarily through vocalizations, of which two primary types are signature whistles (function to convey identity information) and non- signature whistles (functions presently unknown). They are also adept at copying other dolphins’ whistles. Currently, knowledge about copying is limited. My project aims to further the understanding of the contexts of whistle copying in bottlenose dolphins. I investigated whether bottlenose dolphins produce vocal copies in response to a stimulus – playbacks of signature whistles or non-signature whistles, using subsets of playback experiments generated between 1989 and 2014 at Sarasota Bay (Florida) health assessments. Using Raven Pro 1.6, I visually identified all signature and non-signature whistles and potential copies that occurred in each of 59 thirteen-minute playback periods. Copies were independently verified by six naïve observers scoring the similarity of response whistles to stimuli on a five-point scale; twelve whistles with a mean score above three were considered “verified copies”. I examined the association between copy presence/absence and contextual variables such as sex, stimulus whistle type, and recording context using Fisher’s Exact tests. Copy production was not significantly associated with dolphin sex (P = 0.474; odds ratio = 0.539), nor with recording context (P = 0.139; odds ratio = 3.48). Copy production was significantly associated with stimulus type (P = 0.031; odds ratio = 8.41). Additionally, sex and recording context were significantly associated (P = 0.015; odds ratio = 0.247). Future work may investigate variation among individuals in copy production and the role of copies in facilitating certain behaviors
Ophelia: A Prism (2023) Image 13
No full textOphelia: A PrismFebruary 2-5, 2023 Irene and Alan Wurtzel Theater, Oberlin College
By Mieko Gavia \u2711Directed by H. Harvey \u2711
More information about this productionhttps://digitalcommons.oberlin.edu/images_ophelia/1012/thumbnail.jp
Ophelia: A Prism (2023) Image 17
No full textOphelia: A PrismFebruary 2-5, 2023 Irene and Alan Wurtzel Theater, Oberlin College
By Mieko Gavia \u2711Directed by H. Harvey \u2711
More information about this productionhttps://digitalcommons.oberlin.edu/images_ophelia/1016/thumbnail.jp
Stonewallin\u27 (2023) Image 20
No full textStonewallin\u27April 13-16, 2023Irene and Alan Wurtzel Theater, Oberlin College
Written and directed by Kari Barclay
More information about this productionhttps://digitalcommons.oberlin.edu/images_stonewallin/1019/thumbnail.jp
Stonewallin\u27 (2023) Image 21
No full textStonewallin\u27April 13-16, 2023Irene and Alan Wurtzel Theater, Oberlin College
Written and directed by Kari Barclay
More information about this productionhttps://digitalcommons.oberlin.edu/images_stonewallin/1020/thumbnail.jp
C5 methylation confers accessibility, stability and selectivity to picrotoxinin
No full textMinor changes to complex structures can exert major influences on synthesis strategy and functional properties. Here we explore two parallel series of picrotoxinin (PXN, 1) analogs and identify leads with selectivity between mammalian and insect ion channels. These are the first SAR studies of PXN despite its \u3e100-year history and are made possible by advances in total synthesis. We observe a remarkable stabilizing effect of a C5 methyl, which completely blocks C15 alcoholysis via destabilization of an intermediate twist-boat conformer; suppression of this secondary hydrolysis pathway increases half-life in plasma. C5 methylation also decreases potency against vertebrate ion channels (γ-Aminobutyric acid type A (GABAA) receptors) but maintains or increases antagonism of homologous invertebrate GABA-gated chloride channels (resistance to dieldrin (RDL) receptors). Optimal 5MePXN analogs appear to change the PXN binding pose within GABAARs by disruption of a hydrogen bond network. These discoveries were made possible by the lower synthetic burden of 5MePXN (2) and were illuminated by the parallel analog series, which allowed characterization of the role of the synthetically simplifying C5 methyl in channel selectivity. These are the first SAR studies to identify changes to PXN that increase the GABAA-RDL selectivity index
Sideways Stories from Wayside School (2023)
Get PDFhttps://digitalcommons.oberlin.edu/productions_2022-2023/1005/thumbnail.jp