1,720,955 research outputs found
Heart Failure Prediction in Patients with Remotely Monitored Implanted Cardiac Devices: A Multiparametric Model
Full text linkSviluppi ed innovazioni della risonanza magnetica
No full textLa risonanza magnetica è una tecnica di imaging diagnostico non invasiva, all’avanguardia e in continuo rinnovamento, la quale consente di ottenere delle immagini dettagliate, con ottimi livelli di contrasto e di elevata qualità, soprattutto dei tessuti molli.
Dopo aver fornito una descrizione dei principi fisici che la caratterizzano, dei componenti della strumentazione, delle tecniche di formazione delle immagini e degli ambiti di applicazione, l’elaborato ha lo scopo di illustrare le principali innovazioni e gli sviluppi futuri di questa tecnologia, volti a renderla sempre più accessibile a tutte le tipologie di pazienti e anche utilizzabile, grazie alle apparecchiature ibride, per fini terapeutici, specialmente in campo oncologico
Heart failure prediction in patients with remotely monitored implanted cardiac devices: a multiparametric model
No full textHeart failure (HF) and atrial fibrillation (AF) are widely spread among the global population, especially in elderly patients. Usually, they co-exist because they share the same risk factors, but they may also be characterized by a complex cause-effect mechanism, responsible for worsening in the patient’s clinical status, which can lead to recurrent hospitalisations. In fact, it is well known that HF-related hospitalisations represent the 1-2% of all hospital admissions and that they have the highest readmission rate in the short term. Therefore, in order to try to reduce the clinical and economic impact of HF hospitalisations on the national healthcare system, it is fundamental to implement a predicting model to timely identify HF worsening before they require to be managed in a hospital set-up. This project is a continuation of a retrospective study on patients of the Ausl Romagna, which started few years ago at the cardiology department of the Morgagni-Pierantoni hospital in Forlì. The novelty tested in this actual version is the use of the AF burden as a new parameter employed in the final risk-score computation, together with daily and nightly heart rates and physical activity; hence candidates to be selected for this study are only patients implanted with a device carrying a working atrial catheter. The predicting algorithm is realized in Matlab and it combines the daily data trends, remotely collected by ICDs and CRTs devices, to build-up a risk index, which is compared to an upper nominal threshold in order to activate an alarm, indicating a risk to experience a hospital admission in a short time. The results show a good algorithm performance and the obtained metrics are in line with both the version not including the AF burden in the score computation, also applied to devices with only a ventricular catheter, and the alert algorithms designed by the main biomedical devices companies
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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