Search improvement within the geospatial web in the context of spatial data infrastructures

El trabajo desarrollado en esta tesis doctoral demuestra que es posible mejorar la búsqueda en el contexto de las Infraestructuras de Datos Espaciales mediante la aplicación de técnicas y buenas prácticas de otras comunidades científicas, especialmente de las comunidades de la Web y de la Web Semántica (por ejemplo, Linked Data). El uso de las descripciones semánticas y las aproximaciones basadas en el contenido publicado por la comunidad geoespacial pueden ayudar en la búsqueda de información sobre los fenómenos geográficos, y en la búsqueda de recursos geoespaciales en general. El trabajo comienza con un análisis de una aproximación para mejorar la búsqueda de las entidades geoespaciales desde la perspectiva de geocodificación tradicional. La arquitectura de geocodificación compuesta propuesta en este trabajo asegura una mejora de los resultados de geocodificación gracias a la utilización de diferentes proveedores de información geográfica. En este enfoque, el uso de patrones estructurales de diseño y ontologías en esta aproximación permite una arquitectura avanzada en términos de extensibilidad, flexibilidad y adaptabilidad. Además, una arquitectura basada en la selección de servicio de geocodificación permite el desarrollo de una metodología de la georreferenciación de diversos tipos de información geográfica (por ejemplo, direcciones o puntos de interés). A continuación, se presentan dos aplicaciones representativas que requieren una caracterización semántica adicional de los recursos geoespaciales. El enfoque propuesto en este trabajo utiliza contenidos basados en heurísticas para el muestreo de un conjunto de recursos geopesaciales. La primera parte se dedica a la idea de la abstracción de un fenómeno geográfico de su definición espacial. La investigación muestra que las buenas prácticas de la Web Semántica se puede reutilizar en el ámbito de una Infraestructura de Datos Espaciales para describir los servicios geoespaciales estandarizados por Open Geospatial Consortium por medio de geoidentificadores (es decir, por medio de las entidades de una ontología geográfica). La segunda parte de este capítulo desglosa la aquitectura y componentes de un servicio de geoprocesamiento para la identificación automática de ortoimágenes ofrecidas a través de un servicio estándar de publicación de mapas (es decir, los servicios que siguen la especificación OGC Web Map Service). Como resultado de este trabajo se ha propuesto un método para la identificación de los mapas ofrecidos por un Web Map Service que son ortoimágenes. A continuación, el trabajo se dedica al análisis de cuestiones relacionadas con la creación de los metadatos de recursos de la Web en el contexto del dominio geográfico. Este trabajo propone una arquitectura para la generación automática de conocimiento geográfico de los recursos Web. Ha sido necesario desarrollar un método para la estimación de la cobertura geográfica de las páginas Web. Las heurísticas propuestas están basadas en el contenido publicado por os proveedores de información geográfica. El prototipo desarrollado es capaz de generar metadatos. El modelo generado contiene el conjunto mínimo recomendado de elementos requeridos por un catálogo que sigue especificación OGC Catalogue Service for the Web, el estandar recomendado por deiferentes Infraestructuras de Datos Espaciales (por ejemplo, the Infrastructure for Spatial Information in the European Community (INSPIRE)). Además, este estudio determina algunas características de la Web Geoespacial actual. En primer lugar, ofrece algunas características del mercado de los proveedores de los recursos Web de la información geográfica. Este estudio revela algunas prácticas de la comunidad geoespacial en la producción de metadatos de las páginas Web, en particular, la falta de metadatos geográficos. Todo lo anterior es la base del estudio de la cuestión del apoyo a los usuarios no expertos en la búsqueda de recursos de la Web Geoespacial. El motor de búsqueda dedicado a la Web Geoespacial propuesto en este trabajo es capaz de usar como base un motor de búsqueda existente. Por otro lado, da soporte a la búsqueda exploratoria de los recursos geoespaciales descubiertos en la Web. El experimento sobre la precisión y la recuperación ha demostrado que el prototipo desarrollado en este trabajo es al menos tan bueno como el motor de búsqueda remoto. Un estudio dedicado a la utilidad del sistema indica que incluso los no expertos pueden realizar una tarea de búsqueda con resultados satisfactorios

Methods for Matching of Linked Open Social Science Data

In recent years, the concept of Linked Open Data (LOD), has gained popularity and acceptance across various communities and domains. Science politics and organizations claim that the potential of semantic technologies and data exposed in this manner may support and enhance research processes and infrastructures providing research information and services. In this thesis, we investigate whether these expectations can be met in the domain of the social sciences. In particular, we analyse and develop methods for matching social scientific data that is published as Linked Data, which we introduce as Linked Open Social Science Data. Based on expert interviews and a prototype application, we investigate the current consumption of LOD in the social sciences and its requirements. Following these insights, we first focus on the complete publication of Linked Open Social Science Data by extending and developing domain-specific ontologies for representing research communities, research data and thesauri. In the second part, methods for matching Linked Open Social Science Data are developed that address particular patterns and characteristics of the data typically used in social research. The results of this work contribute towards enabling a meaningful application of Linked Data in a scientific domain

The Clergy and Print in Eighteenth-Century England, c. 1714-1750

In much of the historiography surrounding print culture and the book trade, the worldliness of print remains a point of common emphasis. Indeed, many influential studies either assume or actively present the history of print as part of a broader ‘secularization thesis’. Recently, however, historians have challenged these narratives, recognizing the central role of religious print as a driver of growth within the book trade and discussion within the nascent ‘public sphere’. Yet the scholarship into ‘religion and the book’ remains fragmentary, focused on individual genres or persons, with no unified monograph or standard reference work yet to emerge. This dissertation addresses some of the barriers to synopsis by investigating the long-term print output of the largest social and professional group engaged in evangelizing Christianity to the public: the clergy of the Church of England. By focusing on the clergy, this dissertation evades the usual narrow focus on genre. In the past, book-historical and bibliographic studies have relied heavily on a priori classification schemes to study the market for print. While sufficient in the context of relatively well-defined genre categories, such as printed sermons, the validity of these classification schemes breaks down at the wider level, for example, under the conceptual burden of defining the highly fluid and wide-ranging category of ‘religious works’. This dissertation begins to remedy such problems by modelling the print output of a large population of authors who had the strongest stake in evangelizing Christianity to the public through print. It utilizes the latest techniques in the field of digital humanities and bibliometrics to create a representative sample of the print output of the Anglican clergy over the ‘long’ eighteenth-century (here 1660-1800). Based on statistical trends, the thesis identifies a crucial period in the history of clerical print culture, the first four decades of the Hanoverian regime. The period is explored in detail through three subsequent case studies. By combining both traditional and digital methods, therefore, the dissertation explores clerical publishing as a phenomenon subject to evolution and change at both the macro and micro level. The first chapter provides an overarching statistical study of clerical publishing between 1660 and 1800. By combining data from two bibliographical datasets, The English Short-Title Catalogue (ESTC), and the prosopographical resource, The Clergy of the Church of England Database (CCED), I extract and analyse a dataset of clerical works consisting of almost 35,000 bibliographic records. The remaining chapters approach the thesis topic through primary research-based case studies using both print and manuscript sources. The case studies were selected from the period identified in the preceding statistical analysis as a crucial transitional moment in the history of clerical publishing culture, c.1714 to 1750. These case studies form chapters 2, 3, and 4, each of which explore a different aspect of a network of authors who worked under the direction of the bishop of London, Edmund Gibson (1723-1748), during the era of Whig hegemony under Sir Robert Walpole. Finally, an appendix outlines the methodology used in chapter 1 to extract the sample of clerical printed works from the ESTC. Overall, the thesis demonstrates the profound influence of the clergy on the development of English print in the hand-press period. It thus forms both a historiographic intervention against the secularization thesis still implicit in discussions of print culture and the book trade, as well as providing a cautionary critique of the revisionism which has shaped recent investigations into the Church of England.AHRC doctoral studentshi

Taxonomic Treatment of Indigofera L. (Fabaceae: Faboideae) in the New World.

The current taxonomic study of Indigofera (Fabaceae) as it occurs in the New World has several aims. The first addresses taxonomic and nomenclatural issues related to North American taxa. Because such issues have not been well understood for many of these taxa at various ranks, a synopsis of all taxa known to be referable to North America is presented along with a thorough discussion of nomenclatural issues (including synonymy) for each. This discussion is initially placed within the framework of the species groups proposed by Rydberg in 1923. A preliminary cladistic analysis of these North American species groups is presented. In that analysis, woody species with opposite leaflets are basal with Platycarpae (possessing flat pods) most basal; the perennial herbaceous species (including Leptosepalae) are most highly derived. Certain difficult species groups are examined and discussed, most notably the Leptosepalae. As a result of preliminary phenetic and starch gel electrophoretic analyses and a subsequent examination of herbarium specimens, Leptosepalae is considered to represent one widespread morphologically variable taxon (I. miniata), occurring from Guatemala to the United States and Cuba. Further, starch gel electrophoresis was employed to examine U.S. populations within this complex. Using morphological and electrophoretic evidence, one taxon (I. texana) included within the Leptosepalae is excluded and maintained as a separate species. An overview of the taxonomy of South American taxa is presented. Taxonomic history, nomenclature, synonymy, and opinion of the status of each taxon are presented. Species groups that are unifoliolate or have alternate leaflets (e.g., I. asperifolia-bongardiana, I. campestris-latifolia-parodiana-retrusa, and I. tephrosioides) are examined in light of their affinity with the I. miniata complex of North America. No definitive conclusions can be drawn, however, without further study of South American material. Finally, in order to provide a complete accounting of all names which have been used for New World Indigofera, a discussion of doubtful or incompletely known taxa is presented. A number of names are excluded from Indigofera and correctly placed within other genera; the most significant of these is I. coronilloides, the correct name of which is Coursetia coronilloides