1,720,965 research outputs found
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
Hydrocephaly at Medici court of 16th century Florence
No full textIntroduction. Hydrocephalus is a congenital or acquired pathology of CNS caused by a misbalance between the production of cerebrospinal fluid and its absorption. Within the framework of the “Medici” Project, the ancient rulers of Renaissance Florence, a paleopathological team of experts from the University of Pisa, the University of Florence and the Superintendence for Florentine Museums, is carrying out a study on 49 tombs of some of the Medici family members (16th-18th centuries) housed in the so-called Medici Chapels of the Basilica of San Lorenzo in Florence. The most recent biomedical technologies have been employed to obtain as much information as possible about the genetic make-up, eating habits, life styles and diseases of these important rulers of Renaissance Florence.
Methods. The skeletal remains of a child, recovered inside a small crypt of the Basilica of S. Lorenzo revealed a little boy of about 5 years, with a stature of 1.15 m. This individual has been identified whit Don Filippino (1577-1582), young son of the Grand Duke Francesco I (1541-1587). The abnormally enlarged skull of this subject was submitted to macroscopic and radiological study (standard X-ray and CAT).
Results and discussion. The paleopathological study, cranial dimensions and calculation of cranial capacity show evident hydrocephaly. The curvature of the left tibia and fibula demonstrates light rickets. A portrait of don Filippino, painted in the same year of death (1582), shows a picture of non-severe hydrocephaly, with low implant of the orbits and auricles and evident expansion of the cranial vault.
Conclusion. This case of hydrocephaly is important not only from paleopathological point of view, but also because it is the first time that a diagnosis of this disease is supported also by an artistic representation
Hospitalizations for bronchiolitis among infants before and after the SARS-CoV-2 pandemic: an area-based study of the Emilia-Romagna Region, Italy
No full textBackgroundBronchiolitis is the most frequent lower respiratory tract infection and a leading cause of hospitalization in infants. Our aim was to assess the incidence and characteristics of bronchiolitis requiring hospital admission in an Italian region before and after the SARS-CoV-2 pandemic.MethodsThis area-based retrospective study analyses 4,396 hospital discharge records (HDR) of children under 1 year of age admitted with a diagnosis of bronchiolitis (ICD9-CM codes 466.11 and 466.19), in Emilia-Romagna (Italy) from January1st, 2018 to December 31th, 2021. Weighted t-testing and Z-testing was carried out.Resultsin the study period, 2-4% of infants were admitted for bronchiolitis (10% of all admissions under 1 year) and 59% of them were aged less than 90 days. After a significant decrease in 2020, bronchiolitis resurged in 2021, and Respiratory Syncytial Virus (RSV) cases reached 82%. RSV cases were more likely to undergo non-invasive ventilation (NIV), oxygen supplementation and to receive i.v. (intravenous) infusions. There was an overall increasing trend in NIV and oxygen supplementation, and a decreasing trend in chest X-rays.ConclusionsThis area-based study shows reduced hospital admissions due to bronchiolitis during the SARS-CoV-2 pandemic and a resurgence of RSV infection after the easing of preventive measures. We also provide information on length of stay and need for hospital treatments. These area-based information will be helpful in assessing the impact of future universal prevention measures
Leiomyosarcoma of the right ovarian vein
No full textThe case of a 70-year-old patient with a leiomyosarcoma of the right ovarian vein is presented. For this rare entity, complete surgical excision is believed to offer the best chance of cur
RICKETS AT THE MEDICI COURT OF FLORENCE: THE CASE OF DON FILIPPINO (1577-1582)
Full text linkAmong the children found in the crypt of the Grand Duke Giangastone in S. Lorenzo Basilica (Florence), the skeletal remains of a 5-year-old child still wearing his fine high social status clothing were recovered. This child of the Medici family was identified as Don Filippino (1577-1582), son of the Grand Duke Francesco I (1541-1587) and Giovanna from Austria (1547-1578). The prince showed several pathological deformities of the cranial and post-cranial skeleton, including enlargement of the cranium, thinning of the cranial vault bones (craniotabes), platybasia and marked bending of femora, tibiae and fibulae. Differential diagnosis suggests that Don Filippino was affected by rickets. The occurrence of this metabolic disease related to vitamin D deficiency in a Renaissance high social class individual can be explained by the practice of very prolonged breast-feeding, up until to sunlight. Historical sources describe Don Filippino as frail and sickly, with frequent illnesses and persistent slight fevers, and it can be supposed that the child was frequently confined indoors, especially in the cold season.
Integration of osteoarchaeological evidence with historical documentation suggests that bone lesions observed in the skeletal remains of Don Filippino are compatible with a diagnosis of rickets, caused by the custom of prolonged breast-feeding associated with inadequate sunlight exposure two years of age. Maternal milk contains insufficient vitamin D ratios and retarded weaning severely exposes children to a higher risk of developing rickets, especially if dietary habits are combined with inadequate exposure
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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