17,188 research outputs found

    Assessing the species boundary and ecological niche in freshwater gastropods of the family Physidae (Gastropoda, Hygrophila)

    Get PDF
    The present thesis contributed to increasing the knowledge about the diversity of the neotropical freshwater mollusks. Through the use of different methodologies for analyzing molecular and geographical occurrence data, we address important taxonomic issues and show new paths for future taxonomic research on the Physidae family. This family for a long time had classification proposals based only on morphological characters of the shell and, later, on the anatomy of the soft parts. The application of molecular delimitation methods based on coalescence showed the inadequacy of morphological criteria in discriminating intraspecific variability (overestimating family diversity) and in detecting the existence of cryptic species complexes (underestimating family diversity). The data on the occurrence along with the use of georeferencing tools, modeling, and ecological niche analyses applied to South American physid species, indicated the possibility of errors in species identification and the need to reassess the distribution of these physids using other operational criteria such as molecular approaches to access the actual family diversity and distribution for the continent.A presente tese contribuiu para ampliar o conhecimento sobre a diversidade da malacofauna dulcĂ­cola neotropical. AtravĂ©s do emprego de diferentes metodologias de anĂĄlise de dados moleculares e de ocorrĂȘncia geogrĂĄfica abordamos importantes questĂ”es taxonĂŽmicas e mostramos novos caminhos para futuras pesquisas taxonĂŽmicas da famĂ­lia Physidae. FamĂ­lia essa que por muito tempo teve propostas de classificação embasadas apenas em caracteres morfolĂłgicos da concha e, posteriormente, na anatomia das partes moles. A aplicação de mĂ©todos de delimitação molecular baseados em coalescĂȘncia, evidenciou a insuficiĂȘncia dos critĂ©rios morfolĂłgicos em discriminar a variabilidade intraespecĂ­fica (superestimando a diversidade da famĂ­lia) e, em detectar a existĂȘncia de complexos de espĂ©cies crĂ­pticas (subestimando a diversidade da famĂ­lia). A abordagem de busca intensiva por dados de ocorrĂȘncia junto a utilização de ferramentas de georreferenciamento, modelagem e anĂĄlises de nicho ecolĂłgico aplicadas Ă s espĂ©cies de fisĂ­deos sul-americanos, indicaram a possibilidade de erros de identificação de espĂ©cies e a necessidade de reavaliar a distribuição desses fisĂ­deos usando outros critĂ©rios operacionais, incluindo abordagens moleculares, para acessar a diversidade e distribuição reais da famĂ­lia para o continente

    Post-Millennial Queer Sensibility: Collaborative Authorship as Disidentification in Queer Intertextual Commodities

    Get PDF
    This dissertation is examining LGBTQ+ audiences and creatives collaborating in the creation of new media texts like web shows, podcasts, and video games. The study focuses on three main objects or media texts: Carmilla (web series), Welcome to Night Vale (podcast), and Undertale (video game). These texts are transmedia objects or intertextual commodities. I argue that by using queer gestures of collaborative authorship that reaches out to the audience for canonical contribution create an emerging queer production culture that disidentifies with capitalism even as it negotiates capitalistic structures. The post-millennial queer sensibility is a constellation of aesthetics, self-representation, alternative financing, and interactivity that prioritizes community, trust, and authenticity using new technologies for co-creation. Within my study, there are four key tactics or queer gestures being explored: remediation, radical ambiguity and multi-forms as queer aesthetics, audience self-representation, alternative financing like micropatronage & licensed fan-made merchandise, and interactivity as performance. The goal of this project is to better understand the changing conceptions of authorship/ownership, canon/fanon (official text/fan created extensions), and community/capitalism in queer subcultures as an indicator of the potential change in more mainstream cultural attitudes. The project takes into consideration a variety of intersecting identities including gender, race, class, and of course sexual orientation in its analysis. By examining the legal discourse around collaborative authorship, the real-life production practices, and audience-creator interactions and attitudes, this study provides insight into how media creatives work with audiences to co-create self-representative media, the motivations, and rewards for creative, audiences, and owners. This study aims to contribute towards a fuller understanding of queer production cultures and audience reception of these media texts, of which there is relatively little academic information. Specifically, the study mines for insights into the changing attitudes towards authorship, ownership, and collaboration within queer indie media projects, especially as these objects are relying on the self-representation of both audiences and creatives in the formation of the text

    The making of the NEAM Tsunami Hazard Model 2018 (NEAMTHM18)

    Get PDF
    The NEAM Tsunami Hazard Model 2018 (NEAMTHM18) is a probabilistic hazard model for tsunamis generated by earthquakes. It covers the coastlines of the North-eastern Atlantic, the Mediterranean, and connected seas (NEAM). NEAMTHM18 was designed as a three-phase project. The first two phases were dedicated to the model development and hazard calculations, following a formalized decision-making process based on a multiple-expert protocol. The third phase was dedicated to documentation and dissemination. The hazard assessment workflow was structured in Steps and Levels. There are four Steps: Step-1) probabilistic earthquake model; Step-2) tsunami generation and modeling in deep water; Step-3) shoaling and inundation; Step-4) hazard aggregation and uncertainty quantification. Each Step includes a different number of Levels. Level-0 always describes the input data; the other Levels describe the intermediate results needed to proceed from one Step to another. Alternative datasets and models were considered in the implementation. The epistemic hazard uncertainty was quantified through an ensemble modeling technique accounting for alternative models' weights and yielding a distribution of hazard curves represented by the mean and various percentiles. Hazard curves were calculated at 2,343 Points of Interest (POI) distributed at an average spacing of ∌20 km. Precalculated probability maps for five maximum inundation heights (MIH) and hazard intensity maps for five average return periods (ARP) were produced from hazard curves. In the entire NEAM Region, MIHs of several meters are rare but not impossible. Considering a 2% probability of exceedance in 50 years (ARP≈2,475 years), the POIs with MIH >5 m are fewer than 1% and are all in the Mediterranean on Libya, Egypt, Cyprus, and Greece coasts. In the North-East Atlantic, POIs with MIH >3 m are on the coasts of Mauritania and Gulf of Cadiz. Overall, 30% of the POIs have MIH >1 m. NEAMTHM18 results and documentation are available through the TSUMAPS-NEAM project website (http://www.tsumaps-neam.eu/), featuring an interactive web mapper. Although the NEAMTHM18 cannot substitute in-depth analyses at local scales, it represents the first action to start local and more detailed hazard and risk assessments and contributes to designing evacuation maps for tsunami early warning

    Silves bridge geometric model via structure-from-motion: tool for heritage digital catalogs

    Get PDF
    The old bridge in Silves, Portugal, has five perfectly formed arches extending over the Arade river with about 76 meters long built of local materials. In the 14th century this structure was rebuilt on the location of a previous structure built when Silves was the Moorish capital between the 8th and 13th centuries occupation of the Algarve. Though a Roman road might have crossed this area, there is no medieval descriptions mentioning a bridge in Silves, still it is also known as the Roman bridge.After interventions in the 14th, 17th, 18th and 20th centuries, the bridge was classified as monument of public interest and became pedestrian-only and frequently evaluated for its risk of collapse. Stereo-photogrammetry is a recognized surface reconstruction tool applied for almost one century, where from several overlapping images of the surface a 3D model can be obtained. Contrasting with classical stereo-photogrammetry, Structure-from-Motion (SfM) is a nearly automated compilation of digital imagery processing strategies that solve for camera position and surface geometry using matching features identified in several images from diverse perspectives and preferably with high degree of overlap. Together with ongoing increase in computer power, SfM allowed digital stereophotogrammetry to be operative for close-range, high-resolution and non-metric overlapping digital images, and cost-effective. Applying these nearly automated strategies to digital images of the old bridge in Silves taken from the surrounding grounds, a dense point-cloud was computed providing its complete digital model allowing accurate measurements and materials visual identification, key elements for heritage digital catalogs and historical building information models.info:eu-repo/semantics/publishedVersio

    BEGONE THOUGHT: TEMPTATION TO DESPAIR IN LATE-MEDIEVAL RELIGIOUS LITERATURE

    Get PDF
    Though despair and scrupulosity are often thought of as Early Modern or Protestant phenomena, they manifest as significant concerns especially in late medieval hagiography and pastoralia. This dissertation traces the threads of intrusive thoughts and scrupulosity as spiritual challenges through medieval religious literature, with a focus on the fourteenth and fifteenth centuries, as a type of “temptation to despair.” I examine a range of medieval texts and their manuscript contexts from the twelfth through the fifteenth century including The Profits of Tribulation, The Chastising of God’s Children, William Flete’s Remedies Against Temptation, The Life of Christina of Markyate, Marie d’Oignies’s vita, Birgitta of Sweden’s Revelations, Catherine of Siena’s vitae and The Orcherd of Syon, The Book of Margery Kempe, and The Shewings of Julian of Norwich, among others, with the lenses of the history of emotions and medieval gender to better understand the valences of medieval temptation to despair. I argue that temptation to despair was conceptually rooted in the tradition of tribulation as spiritually profitable; that temptation to despair could be conceived of as a nun’s scrupulosity or worry over past sins on a lay person’s deathbed; and that these modes of despair became more deeply intermingled by the late Middle Ages. Moreover, I demonstrate that temptation to despair—especially intrusive thoughts—held particular weight in female spirituality, given medieval anxiety over women’s enclosure

    An Artifact and Spatial Analysis of South Branch House (FfNm-1)

    Get PDF
    The archaeological site FfNm-1 (South Branch House) is a late 1700s fur trade site located on the South Saskatchewan River in Central Saskatchewan. Its construction is attributed to the Hudson’s Bay Company fur trade post of the same name, dating to between 1786-1794. Between the years of 2005 and 2014 the Saskatchewan Archaeological Society operated a series of public field schools with the purpose of excavating this site and exposing the public to a hands-on archaeological experience. The results of these field schools recovered over 24,000 artifacts and excavated 215 units. The identity, corporate affiliation and occupation dates of the site were called into question prior to the completion of the field schools. Today, after nearly a decade of field work on this site has taken place, the large quantity of data offers an excellent opportunity to re-evaluate what is known about FfNm-1. The following thesis contributes to this re-evaluation through a functional analysis of the site’s artifacts and GIS-based horizontal and vertical analyses of artifact distribution. Through multiple lines of evidence these analyses successfully determined a range of occupation dates at the site, as well as provided tentative corporate affiliations. It was further determined that while more information is needed, the site is consistent with what would be expected at the Hudson’s Bay Company’s South Branch House

    LG MS 111 Fortuna, Henderson, Prizer Collection

    Get PDF
    Donated collectively by Stan Fortuna, Susan Henderson, and Peter Prizer, early activists in Maine’s LGBTQ+ history, this collection of research material spans from 1974 to 2014, with the bulk of material from the mid-1970s. This collection documents the development and activities of the Maine Gay Task Force, including the creation and publication of a newsletter from 1974 to 1980. It opens with planning materials and news coverage of the first statewide gathering for gay people, the Maine Gay Symposium held at the University of Maine’s Orono campus, an event which sparked statewide organizing efforts, including the creation of the Maine Gay Task Force. Completed and draft versions of the Maine Gay Task Force Newsletter from August 1974 to November 1976 are included in this collection, as well as issues of Mainely Gay from January 1977 to April 1980. Please note that these publications are also available on Digital Commons. The collection shows how the publication evolved from MGTF Newsletter to Mainely Gay; the initial issue under new name (Vol 4, #1) notes that “we are a lot more than a group newsletter now” and that “35% of our subscriptions go out of Maine,” reflecting a growing engagement with the larger national community. The bulk of the collection is comprised of LGBTQ+ newspapers and newsletters produced in Maine and across the U.S. between the mid-1970s and early 1980s. The collection’s donors engaged in publication “exchanges” and collected 4 relevant media coverage of local and national LGBTQ+ issues, as well as other areas of social justice interest, amassing over 100 statewide and national publications from over 20 states. The collection also includes a number of subject files on LGBTQ+ and other sociopolitical issues, personal and organizational correspondence, registration forms and other planning information for the Maine Gay symposium, news clippings, pins, and other ephemera

    Improving the Paintability of Sheet Molding Compounds for High-Volume Production

    Get PDF
    Sheet Molding Compounds (SMC) present a promising alternative for sheet metal in automotive exterior body panel applications. They offer excellent specific mechanical properties, improved design freedom and a cost-efficient manufacturing process. However, the paintability of SMCs is challenging and this issue has kept the material from a more widespread application, in spite all inherent advantages. This work investigates the underlying reasons of paint defect occurrence and proposes novel solutions to improve upon state-of-the-art technology. Through the modification of conventional SMC an improved surface compound is proposed. This can be combined with a novel manufacturing process, denoted Co-Compression-Molding, which enables the molding of two individual compounds in a single step. The work offers insight into appropriate molding parameter selection to ensure a flawless compression molding process. Additional processing steps are proposed to further improve manufacturing, such as thermography for the early detection of sub-surface voids, and post-processing via electron beam curing.:1 Introduction 1.1 Motivation and Objectives 1.2 Solution Approach 2 State of the Art 2.1 Automotive Production 2.1.1 Paint Processes 2.1.2 Quality Assessment Techniques 2.2 Sheet Molding Compounds 2.2.1 Manufacturing and Composition 2.2.2 Mechanical Properties 2.2.3 Conventional Methods of Surface Improvement 2.2.4 Recycling Methods 2.3 Compression Molding 2.3.1 Mold Flow of Sheet Molding Compounds 2.3.2 Compound Rheology 2.3.3 Inherent Porosity 2.3.4 Co-Molding Process 2.3.5 Alternative Approaches and Auxiliary Processes 3 Reduced Fiber Weight Fraction Compounds 3.1 Porosity as the Source of Defects 3.2 Compounding and Compression Molding 3.3 Compound Characterization 3.3.1 Fiber Network Permeability 3.3.2 Rheology and Flowability 3.3.3 Physical Properties 3.3.4 Pore Content and Porosity Elimination 3.4 Effect on Paintability 4 Co-Compression Molding 4.1 Hybrid Material Flow 4.2 Materials 4.3 Molding Trials and Testing 4.3.1 Flat Plaque Testing 5 Auxiliary Processes 5.1 Thermography 5.1.1 Materials 5.1.2 Experiments 5.2 Electron Beam Curing 5.2.1 Residual Reactivity 5.2.2 Irradiation and Post-Curing 6 Full-Scale Trials 6.1 Class-A Panel 6.2 Semi-Structural Component 6.3 Technology Demonstrator 6.3.1 Cost Comparison 6.4 Application Guidance 6.4.1 Reduced Fiber Fraction Compounds 6.4.2 Co-Compression Molding 6.4.3 Application of Auxiliary Processes 7 Summary Bibliography Appendix A Evolution of Vehicle Curb Weight B Porosity Structure of Normal Density Compound C Surface Veil Distortion During Compression Moldin
    • 

    corecore