The elastic I=3/2I=3/2 pp-wave nucleon-pion scattering amplitude and the Δ(1232)\Delta(1232) resonance from Nf=2+1N_{\mathrm{f}}=2+1 lattice QCD

We present the first direct determination of meson-baryon resonance parameters from a scattering amplitude calculated using lattice QCD. In particular, we calculate the elastic $I=3/2$, $p$-wave nucleon-pion amplitude on a single ensemble of $N_{\mathrm{f}}=2+1$ Wilson-clover fermions with $m_{\pi}=280\mathrm{MeV}$ and $m_{K}=460\mathrm{MeV}$. At these quark masses, the $\Delta(1232)$ resonance pole is found close to the $N-\pi$ threshold and a Breit-Wigner fit to the amplitude gives $g^{\mathrm{BW}}_{\Delta N\pi}=19.0(4.7)$ in agreement with phenomenological determinations.Comment: 7 pages, 2 figures. Agrees with published version, one additional phase shift point and clarification of different coupling convention

Environmental education in secondary schools in metropolitan Durban : opportunities and constraints in the use of the natural environment

Bibliography: leaves 168-177.The study is placed in the context of the development of Environmental Education and the integral role of fieldwork in fulfilling its objectives. The requirements of teachers regarding the use of natural areas for environmental/ecological fieldwork were investigated by means of two surveys which used open-ended questions and numerical rating scales. An exploratory postal survey of school principals was used to investigate the current use of natural areas by schools and the relative importance of constraints upon fieldwork. It was found that, while most White schools made some formal use of natural areas, fewer Asian and Coloured schools did so, and fieldwork amongst Black schools was almost non-existent. Extra curricular fieldwork was primarily a phenomenon in White schools. Constraints varied in importance between schools in different education departments but overall a lack of teacher training in fieldwork was the major constraint. Interviews with a sample of teachers who had used natural areas provided detailed information on their environmental/ecological fieldwork requirements. Three hypotheses relating to factors influencing teacher choice of fieldwork sites were tested. In this regard it was found that certain intrinsic characteristics of natural areas, and the availability of teaching resources (including site-specific training and educational field officers) were important influences. Increasing transport costs, while often a secondary consideration, may increase the future demand for local fieldwork sites. The specific characteristics and facilities required of natural areas were investigated in detail. The study concluded that the Durban Metropolitan Open Space System has considerable potential to meet the environmental fieldwork requirements of schools. Towards this end a set of criteria for selecting appropriate natural areas, and a list of priorities for developing them, were established

Infinite Islands: The Seatrees

Infinite Islands: The Seatrees investigates on the subject of infinity as it relates to storytelling and the novel. The critical introduction lays out the relation between reality, fantasy, the imagination and the history of the novel as a source of inspiration for the fictional portion of the dissertation. It considers the similarities between canonical literary novels and fantasy genre novels. Through this consideration, aspects of reality and fantasy in the novel are considered in both theoretical and primary texts. In the fictional portion, an unnamed narrator is retelling the story of his life from beginning to end. Although he works to gain control over his life and pursue his hope of joining a secretive group, he continually becomes caught up in forces more powerful than an individual, only some of which can he ever understand

African Environmental Change from the Pleistocene to the Anthropocene

This review explores what past environmental change in Africa—and African people\u27s response to it—can teach us about how to cope with life in the Anthropocene. Organized around four drivers of change—climate; agriculture and pastoralism; megafauna; and imperialism, colonialism, and capitalism (ICC)—our review zooms in on key regions and debates, including desertification; rangeland degradation; megafauna loss; and land grabbing. Multiscale climate change is a recurring theme in the continent\u27s history, interacting with increasingly intense human activities from several million years onward, leading to oscillating, contingent environmental changes and societally adaptive responses. With high levels of poverty, fast population growth, and potentially dramatic impacts expected from future climate change, Africa is emblematic of the kinds of social and ecological precariousness many fear will characterize the future globally. African people\u27s innovation and adaptation to contingency may place them among the avant-garde with respect to thinking about Anthropocene conditions, strategies, and possibilities

Modelling Cross-Document Interdependencies in Medieval Charters of the St. Katharinenspital in Regensburg

To overcome the limitations of structural XML mark-up, graph-based data models and graph databases, as well as event-based ontologies like CIDOC-CRM (FORTH-ICS 2018) have been considered for the creation of digital editions. We apply the graph-based approach to model charter regests and extend it with the CIDOC-CRM ontology, as it allows us to integrate information from different sources into a flexible data model. By implementing the ontology within the Neo4j graph database (Neo4j 2018) we create a sustainable data source that allows explorative search queries and finally, the integration of the database in various technical systems. Our use case are the charters from the St. Katharinenspital, a former medieval hospital in Regensburg, Germany. By analysing charter abstracts with natural language processing (NLP) methods and using additional data sources related to the charters, we generate additional metadata. The extracted information allows the modelling of cross-document interdependencies of charter regests and their related entities. Building upon this, we develop an exploratory web application that allows to investigate a graph-based digital edition. Thereby, each entity is displayed in its unique context, i.e., it is shown together with its related entities (next neighbours) in the graph. We use this to enhance the result lists of a full-text search, and to generate entity-specific detail pages