1,721,086 research outputs found
Preface for the 1st Workshop on Semantic Generative Agents on the Web at ESWC 2025 (SemGenAge2025)
No full textThis preface summarises the 1st Workshop on Semantic Generative Agents on the Web (SemGenAge2025), a co-event with the Extended Semantic Web Conference (ESWC 2025), held on May 2nd, 2025, in Portorož, Slovenia.</p
Orchestrating global systems science and information technologies for policy modelling: The SYMPHONY approach
No full textIn our globalized world public policy making and society at large face challenges like climate change and financial crises that are global, shared worldwide and tightly connected with policies across different sectors. Solutions for addressing such highly interconnected challenges in a 'system of systems' world, tend to address only subsystems and so fail to achieve systemic change and anticipate impact and unintended consequences of public action. Pursuing the necessity of informing the policy decision process and proactively sensing possible problems concerning global matters we are proposing a novel computational platform called SYMPHONY that offers a solution for designing and testing policies and regulatory measures. Our aim is to offer policy modellers and policy makers tools that will support them to make decisions which will prevent and mitigate economic and financial crises as well as foster an economically and ecologically sustainable growth path
Analyzing Tag Semantics Across Collaborative Tagging Systems
No full textThe objective of our group was to exploit state-of-the-art Information Retrieval methods for finding associations and dependencies between tags, capturing and representing differences in tagging behavior and vocabulary of various folksonomies, with the overall aim to better understand the semantics of tags and the tagging process. Therefore we analyze the semantic content of tags in the Flickr and Delicious folksonomies. We find that: tag context similarity leads to meaningful results in Flickr, despite its narrow folksonomy character; the comparison of tags across Flickr and Delicious shows little semantic overlap, being tags in Flickr associated more to visual aspects rather than technological as it seems to be in Delicious; there are regions in the tag-tag space, provided with the cosine similarity metric, that are characterized by high density; the order of tags inside a post has a semantic relevance
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Orchestrating global systems science and information technologies for policy modelling: The SYMPHONY approach
No full textIn our globalized world public policy making and society at large face challenges like climate change and financial crises that are global, shared worldwide and tightly connected with policies across different sectors. Solutions for addressing such highly interconnected challenges in a 'system of systems' world, tend to address only subsystems and so fail to achieve systemic change and anticipate impact and unintended consequences of public action. Pursuing the necessity of informing the policy decision process and proactively sensing possible problems concerning global matters we are proposing a novel computational platform called SYMPHONY that offers a solution for designing and testing policies and regulatory measures. Our aim is to offer policy modellers and policy makers tools that will support them to make decisions which will prevent and mitigate economic and financial crises as well as foster an economically and ecologically sustainable growth path
Topic modelling and sentiment analysis of COVID-19 related news on Croatian Internet portal
No full textThe research aims to identify topics and sentiments related to the COVID-19 pandemic in Croatian online news media. For
analysis, we used news related to the COVID-19 pandemic from the Croatian portal Tportal.hr published from 1st January 2020 to 19th February 2021. Topic modelling was conducted by using the LDA method, while dominant emotions and sentiments related to extracted topics were identified by National Research Council Canada (NRC) word-emotion lexicon created originally for English and translated into Croatian, among other languages. We believe that the results of this research will enable a better understanding of the crisis communication in the Croatian media related to the COVID-19 pandemic
Deriving biased classifiers for better ROC performance
Full text linkROC analysis makes it possible to evaluate how well classifiers will perform given certain misclassification costs and class distributions. Given a set of classifiers, it also provides a method for constructing a hybrid classifier that optimally uses the available classifiers. Now in some cases it is possible to derive multiple classifiers from a single one, in a cheap way, and such that these classifiers focus on different areas of the ROC diagram, such that a hybrid classifier with better overall ROC performance can be constructed. This principle is quite generally applicable; here we describe a method to apply it to decision tree classifiers. An experimental evaluation illustrates the usefulness of the technique.status: Publishe
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