1,721,032 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
Epidemiology of malignant pleural mesothelioma in the province of Sassari (Sardinia, Italy). A population-based report
No full textCLASSIC KAPOSI'S SARCOMA AND OTHER SYNCHRONOUS OR HETEROCHRONOUS TUMOURS: A POPULATION-BASED STUDY
No full textIntroduction: The aim of this study was to define the incidence of classic Kaposi's sarcoma in Sardinian patients with another synchronous or heterochronous malignancy, and to evaluate the role of classic Kaposi's sarcoma as a risk factor for cancer.Materials and methods: Data from the cancer registry of Sassari province, including all incident cases of classic Kaposi's sarcoma, as well as all other types of cancer during an 18 year period (1992-2010) were used for analysis.Results: The European adjusted incidence rates of Kaposi's sarcoma in North Sardinia was high in both males (2.25/100.000) and females (0.85/100,000). However, a decreasing incidence trend was observed in the period under investigation. Odds ratio between these patients and those with multiple neoplasias other than Kaposi's sarcoma was 3.40.Conclusions: A high incidence but a decreasing trend of classic Kaposi's sarcoma was detected in North Sardinia during the period under investigation. Our data suggest that classic Kaposi's sarcoma may have a role in the development of further malignancies in affected patients
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
Lung Cancer Epidemiology in North Sardinia, Italy
No full textBackground: The aim of this study was to analyze and describe the epidemiological characteristics and trends of lung cancer in North Sardinia, Italy, in the period 1992–2010. Methods: Data were obtained from the tumor registry of Sassari province which is a part of a wider registry web, coordinated today by the Italian Association for Tumor Registries. Results: The overall number of lung cancer cases registered was 4,325. The male-to-female ratio was 4.6:1 and the mean age 68.1 years for males and 67 years for females. The standardized incidence rates were 73.1/100,000 and 13.5/100,000 and the standardized mortality rates 55.7/100,000 and 9.9/100,000 for males and females, respectively. An increasing trend in incidence of lung cancer in women was evidenced. Conversely, incidence was found to decrease in males. Relative survival at 5 years from diagnosis was low (8.8% for males and 14.9% for females). Furthermore, an increase in mortality rates was observed in both sexes in the period under investigation. Conclusions: Our data show an increasing trend of lung cancer incidence in women in North Sardinia in the last decades. Conversely, a reduction of incidence rates was observed in males. Furthermore, a slightly increasing trend in mortality rates was observed in both sexes, suggesting the need to enhance smoking control strategies, consider adoption of effective surveillance policies, and improve diagnosis and treatment methods
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
Pancreatic cancer burden in North Sardinia, Italy
No full textIntroduction: Pancreatic cancer can arise in the exocrine or endocrine part of the gland, and represents a relevant modern
health care issue because of its extremely high mortality and increasing incidence in most developed countries, which imposes a constant epidemiological surveillance. The aim of this study was to analyse and describe the epidemiology of pancreatic cancer in North Sardinia, Italy, in the period 1992-2010.
Materials and methods: Data were obtained from the tumor registry of Sassari province that makes part of a wider registry
web, coordinated today by the Italian Association for Tumor Registries (AIRTUM).
Results: The overall number of pancreatic cancer cases registered was 1,388. The male-to-female ratio was approximately 1:1
and the mean age 69 years for males and 73 years for females. The standardized incidence rates were 13.7/100,000 and 9.4/100,000 and the standardized mortality rates 13.3/100,000 and 8.6/100,000 for males and females respectively. The relative 5-years survival was 6.9% for males and 6.2% for females.
Discussion: Incidence rates of pancreatic cancer in North Sardinia were similar to those of other countries close to the equator,
confirming an inverse variation with solar exposure, and thus, vitamin D levels. Furthermore, our data showed a substantially
stable trend in incidence and mortality rates of pancreatic cancer in both sexes in the last decades in the area. The relative survival
rates were low, therefore efforts in all fields of research and clinical practice must be enhanced to improve outcomes in patients with pancreatic cancer
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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