1,721,117 research outputs found
Monitoring Fetal Heart Rate during Pregnancy: Contributions from Advanced Signal Processing and Wearable Technology
Full text linkMonitoring procedures are the basis to evaluate the clinical state of patients and to assess changes in their conditions, thus providing necessary interventions in time. Both these two objectives can be achieved by integrating technological development with methodological tools, thus allowing accurate classification and extraction of useful diagnostic information. The paper is focused on monitoring procedures applied to fetal heart rate variability (FHRV) signals, collected during pregnancy, in order to assess fetal well-being. The use of linear time and frequency techniques as well as the computation of non linear indices can contribute to enhancing the diagnostic power and reliability of fetal monitoring. The paper shows how advanced signal processing approaches can contribute to developing new diagnostic and classification indices. Their usefulness is evaluated by comparing two selected populations: normal fetuses and intra uterine growth restricted (IUGR) fetuses. Results show that the computation of different indices on FHRV signals, either linear and nonlinear, gives helpful indications to describe pathophysiological mechanisms involved in the cardiovascular and neural system controlling the fetal heart. As a further contribution, the paper briefly describes how the introduction of wearable systems for fetal ECG recording could provide new technological solutions improving the quality and usability of prenatal monitoring. © 2014 Maria G. Signorini et al
Riabilitazione del disturbo visivo di origine periferica e centrale: ruolo dell'ambiente nella riorganizzazione della funzione
No full textPozzo Faceto di Fasan
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
Children over “-enty, -rty, -fty”: gamification and autonomy as an environmental education leitmotif for “children of all ages” using a new workplace narrative
Full text linkThe "Pocket Trainer" research project is part of a more comprehensive project, the "Ufficio Proattivo 150" project, which aims to assess a new workplace concept as an opportunity for individual development and health promotion, which differs from frequent beliefs that consider the workplace itself the cause of sedentarism or stress. By this rationale, new workstations plan to substitute the natural environment. Owing to innovative architectural solutions and specific equipment designs, the employees can exercise without interrupting the usual workflow. Individualized and adapted training programs support this user–place interaction in the spirit of gamification and distinguishing factories oriented at promoting the awareness of proper health practices of their employees. We designed a new portable and straightforward equipment, the cube fitness test (CFT), which is based on exercising at submaximal intensity. It can be used in several environments: at home, in the office, indoors, and outdoors. A preliminary investigation assessed the validity and reliability of CFT. A total of 54 individuals (21 females and 33 males, 20.0 ± 4.2 years old, 65.0 ± 11.4-kg body weight, 1.74 ± 0.09-m stature, 22.0 ± 2.4-kg·m−2 body mass index) participated in this study. They were tested on cardio-respiratory and muscular endurance, flexibility, core muscular efficiency, shoulder mobility, and upper body strength; the obtained results were related to measurements performed using CFT. Overall, acceptable and good reliability were obtained in single tests (r > 0.66; p < 0.001), and moderate to good validity was observed (r > 0.50; p < 0.001). Low validity was found in the core muscular efficiency (r = 0.44; p < 0.001). CFT is a reliable instrument that contributes to developing consciousness, culture, and motivation toward physical activity. It provides knowledge of the advantages of good behaviour on the health status and quality of working life. This study confirmed that even mild and minimal exercise contributes to improving physical and mental health. Hence, the use of CFT in the Pocket Trainer intends to promote health at usual workplaces and in particular: i) higher wellbeing levels (actual and perceived), ii) new awareness on properties of physical activity on health prevention and healthy lifestyle promotion
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
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