127,901 research outputs found
A semiparametric bivariate probit model for joint modeling of outcomes in STEMI patients
No full textIn this work we analyse the relationship among in-hospital mortality and a treatment effectiveness outcome in patients affected by ST-Elevation myocardial infarction. The main idea is to carry out a joint modeling of the two outcomes applying a Semiparametric Bivariate Probit Model to data arising from a clinical registry called STEMI Archive. A realistic quantification of the relationship between outcomes can be problematic for several reasons. First, latent factors associated with hospitals organization can affect the treatment efficacy and/or interact with patient’s condition at admission time. Moreover, they can also directly influence the mortality outcome. Such factors can be hardly measurable. Thus, the use of classical estimation methods will clearly result in inconsistent or biased parameter estimates. Secondly, covariate-outcomes relationships can exhibit nonlinear patterns. Provided that proper statistical methods for model fitting in such framework are available, it is possible to employ a simultaneous estimation approach to account for unobservable confounders. Such a framework can also provide flexible covariate structures and model the whole conditional distribution of the response
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Chinese Travel Blogs in English : A Cross-Cultural Discursive Perspective
No full textAmong the cohorts of China’s netizens are there travel bloggers that write in English? If so, who are they, what do they write about and how? In order to provide a snapshot of this in-between discursive space, a digital ethnographic approach was adopted to circumscribe a data set of four English-language travel blogs about China, written by Chinese authors, or at least bilingual and bicultural ones, for an audience of international tourists. Consisting of 186 posts from 2010 to 2016, the textual selection was then queried by means of the Leximancer software tool to retrieve the main themes and concepts across the data set and their mutual semantic connections. Text-mining results were finally subjected to a discourse-analytic overview, aiming to illustrate a few pivotal points in the representation of China by social actors that are purportedly insiders of Chinese culture, though with varying degrees of engagement: to Western tourists’ surprise, the emerging representation of the country defies preconceived cultural scripts
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Editorial IPRD06
No full textEditorial dei Proceedings del 10th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD06) 1 - 5 October 2006 Siena, Ital
Viaggiare in rete: i travel blog
No full textObiettivo del capitolo è l'analisi linguistico-testuale dei blog di viaggio che permette di approfondire i mutamenti nella comunicazione turistica e nelle pratiche di mobilità
Editorial
No full textEditoriale dei Proceedings del 9th Topical Seminar on Innovative Particle and Radiation Detectors 23 - 26 May 2004 Siena, Ital
Discursive Pitfalls of the 'Smart City' Concept
No full textThis chapter sets out to unpack the complexities of the smart city concept, discussing its shifting set of meanings in news media in their role of main knowledge brokers. A textual selection of news stories, commentary, online discussions and analysis published by Guardian Cities - the newspaper's platform dedicated to urban issues - is critically investigated in order to elicit the recurrent threads and discursive tensions of a global debate that extends over an ambitious axiological map – technology hype, sustainability, social inclusion and active citizenship being among its bold promises
Statistical properties of urn designs in clinical trials
No full textWe propose a response-adaptive design, described in terms of urn model, whose allocation proportion converges to prespecified values. The main asymptotic results concerning the urn designs are presented and discussed. We adopt the urn model to implement the random allocation procedure of an experiment that aims at testing the mean effect of two treatments. We conduct a statistical analysis on the inferential performance of different tests and we show that, given a non adaptive test T0, the response adaptive model constructs a test T that is better than T0, in terms of (a) higher power and (b) fewer subjects assigned to the inferior treatment. A retrospective real case study is presented
Pragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
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