1,223 research outputs found
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
Semiometrics: Applying Ontologies across Large-Scale Digital Libraries
No full textAs large-scale digital libraries become more available and complete, not to mention more numerous, it is clear there is a need for services that can draw together and perform inference calculations on the metadata produced. However, the traditional Relational Database Management System (RDBMS) model, while efficiently constructed and optimised for many business structures, does not necessarily cope well with issues of concurrent data updates and retrieval at the scale of hundreds of thousands of papers. At the same time the growth of RDF and the increasing interest in Semantic Web technologies perhaps begins to present a viable alternative at a scalable, practical level. This paper considers a specific application of large-scale metadata analysis and conducts scalability tests using real-world data. It concludes that RDF technologies are both a scalable and performance-realistic alternative to traditional RDBMS approaches. It also shows that for relationship-based queries on large-scale metadata stores, RDF technologies can significantly out-perform traditional RDBMS approaches by allowing both retrieval and updating of data in a timely manner
Semiometrics: producing a compositional view of influence
No full textHigh-impact academic papers are not necessarily the most cited. For example, Einstein's 'Special Relativity' paper from 1905 received (and continues to receive) fewer citations from other papers than his 'Brownian Motion" paper of the same year, despite the former radically changing the course of an entire scientific discipline to a much greater extent. Similarly, 'impact' metrics using citation count alone are, it is argued, not adequate for determining the scientific influence of papers, authors or small groups of authors. Although valid, they remain controversial when used to determine influence of larger groups or journals. While the term 'impact' has become closely linked to a journal's citation-based Journal Impact Factor score, this thesis uses the term 'influence' to describe the wider effectiveness of research, combining citation and metadata analysis to allow richer calculations to be performed over large-scale document networks. As a result, more qualitative influence ratings can be determined and a broader outlook on scientific disciplines can be produced. These ratings are best applied using an ontology-based data source, allowing more efficient inference than under a traditional RDBMS system, and allowing easier integration between heterogeneous data sources. These metrics, termed 'Semantic Bibliometrics' or 'Semiometrics', can be applied at a variety of levels of granularity, allowing a compositional framework for impact and influence analysis. This thesis describes the process of data preparation, systems architecture, metric value and data integration for such a system, introducing novel approaches at all four stages, thereby creating a working semiometrics system for determining influence at different semantic levels of granularity
Illustrated type catalogue of Amphidromus Albers, 1850 in the Natural History Museum, London, and descriptions of two new species
Get PDFCopyright Chirasak Sutcharit et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The attached file is the published version of the article.NHM Repositor
Floating, Official Dollarization, and Macroeconomic Volatility:An Analysis for the Chilean Economy
Get PDFThis paper contrasts the volatility of the main macroeconomic variables of a small open economy in two environments: an official dollarization (OD) scheme and a flexible exchange regime (FER). A simple DSGE model calibrated for the Chilean economy is used as a laboratory to study the implications of these regimes on the standard deviations of key variables. Welfare implications are also analyzed for a central bank that it is concerned with output and inflation volatility. Our findings show that OD results in: higher real volatility due to the absence of ountercyclical monetary policy; lower inflation volatility because of a less volatile foreign interest rate; and, from a welfare perspective, OD is dominated by a FER when the central bank weighs considerably the deviations of inflation and output from the steady state. Also, OD implies higher fiscal deficit volatility as a consequence of higher tax revenue volatility, and a higher reaction to terms-of-trade shocks.
The Campbells: lordship, literature and liminality
Get PDFThe Campbells have the potential to offer much to the theme of literature and borders, given that the kindred’s astonishing political success in the late medieval and early modern period depended heavily upon the ability to negotiate multiple frontiers: between Highlands and Lowlands; between Gaelic Scotland and Ireland, and, especially after the Reformation, with England and the matter of Britain. This paper will explore the literary dimension to Campbell expansionism, from the Book of the Dean of Lismore in the earlier sixteenth century, to poetry addressed to dukes of Argyll in the earlier eighteenth century. Particular attention will be paid to the literary proclivities of the household of the Campbells of Glenorchy on either side of what appears to be a major watershed in 1550; and to the agenda of the Campbell protégé John Carswell, first post-Reformation bishop of the Isles, and author of the first printed book in Gaelic in either Scotland or Ireland, Foirm na n-Urrnuidheadh (‘The Form of Prayers’), published at Edinburgh in 1567
Attitudes to the rights and rewards for author contributions to repositories for teaching and learning
Get PDFIn the United Kingdom over the past few years there has been a dramatic growth of national and regional repositories to collect and disseminate resources related to teaching and learning. Most notable of these are the Joint Information Systems Committee’s Online Repository for [Learning and Teaching] Materials as well as the Higher Education Academy’s subject specific resource databases. Repositories in general can hold a range of materials not only related to teaching and learning, but more recently the term ‘institutional repository’ is being used to describe a repository that has been established to support open access to a university’s research output. This paper reports on a survey conducted to gather the views of academics, support staff and managers on their past experiences and future expectations of the use of repositories for teaching and learning. The survey explored the rights and rewards associated with the deposit of materials into such repositories. The findings suggest what could be considered to be an ‘ideal’ repository from the contributors’ perspective and also outlines many of the concerns expressed by respondents in the survey
Beyond Lesson Studies and Design Experiments: Using theoretical tools in practice and finding out how they work
Get PDFThis paper aims to illustrate how fruitful insights into the link between school teaching practice and student learning outcomes can be theoretically grounded by the variation theory from the field of phenomenography; and from this framework demonstrate how a 'pedagogy of awareness' can be implemented in the classroom. In this study, five teachers and 162 students at Primary Four level of school education in Hong Kong participated and the practice of the 'learning study' was adopted. By comparing the results of pre- and posttests, a significant gain was observed in the students learning outcomes.
Evolution in management and outcome after repair of abdominal aortic aneurysms in the pre- and post-EVAR era
No full textObjective. To compare outcomes of abdominal aortic aneurysm repairs before and after the endovascular era. Methods. Group A (1997-1998) included 331 patients, 321 (97%) with open repair (OR) and 10 (3%) with endovascular aneurysm repair (EVAR). Group B (2007-2008) included 330 patients, 136 (41%) with OR and 194 (59%) with EVAR. Results. Patients in Group B were older (74 ± 8.5 vs 73 ± 7.0 years, P =.02), had higher comorbidity scores (8.3 ± 4.8 vs 7.5 ± 4.6, P =.04), shorter hospitalization (5.1 ± 6.4 vs 9.8 ± 6.3, P <.001), less intensive care unit days than in Group B (0.9 ± 2.1 vs 2.2 ± 2.7, P <.001). Early mortality was 0.6% in both groups. Two-year survival was similar (88% vs 89%), with less reinterventions in Group A (4% vs 17%, P =.004). OR patients had similar 30-day mortalities (0.9% vs 0.7%, P =.89). Conclusion. EVAR and OR have low mortalities. However, in the post-EVAR era we treat older patients with more comorbidities, hospitalization is shorter, and intensive care unit days are less; interventions in EVAR are, however, high. © The Author(s) 2013
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