1,721,024 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
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
Clinical characterization of children and adolescents with ADHD and sleep disturbances
No full textSleep disturbances (SD) are commonly reported concerns among parents and caregivers of children and adolescents with Attention-Deficit/Hyperactivity Disorder (ADHD). While it is widely acknowledged that SD can worsen various aspects of children and adolescents’ well-being (e.g., academic performance and emotional/behavioral state), a comprehensive clinical characterization of ADHD and SD is currently lacking. To address this gap, 136 children and adolescents diagnosed with ADHD (aged 6 to 14 years) were retrospectively selected by reviewing electronic health records of hundreds of patients with neuropsychiatric disorders referred to the children’s hospital. Participants were divided into two groups based on the presence of SD, assessed via a parent-report questionnaire (94 ADHD without SD and 42 ADHD with SD). Standardized measures of adaptive behavior, academic performance, ADHD-related and emotional/behavioral symptoms were collected. Results documented that the group of ADHD with SD obtained worse scores in specific aspects of adaptive behavior (conceptual and practical domains), academic performance (text comprehension, writing), ADHD symptoms (inattention) and emotional/behavioral difficulties (especially, mood/emotional regulation and stress) compared to those with ADHD without SD. In addition, our results established a relationship between sleep problems and diverse clinical aspects of children and adolescents with ADHD, while controlling for age, cognitive level, gender, ADHD symptoms severity, and Body Mass Index. From a clinical perspective, our study suggests that the presence of SD in patients with ADHD may serve as an indicator for strengths and weaknesses in this population, even demonstrating an independent relationship with specific clinical dimensions. Implications to improve clinical diagnostic and therapeutic interventions are discussed
Retroperitoneal cysts: a case report.
No full textRetroperitoneal cysts are rare lesions, variable from asymptomatic cases with incidental discovery to case with acute or chronic abdominal discomfort. A 50-year-old female after a car crash refered chronic abdominal pain. An X-ray revealed the presence of sternal and multiple costal fractures. Abdominal ultrasonography (US) and computed tomography (CT) lead to the discovery of a retroperitoneal cyst too. As the patient was well after fractures solution, we decided to control the cyst in the time. In symptomatic cases surgery is the treatment of choice. The advent of laparoscopic surgery allows resection of these cysts to be achieved without full laparotomy
Intravenous indomethacin and metamizol in renal colic: Comparative investigation | [L'IMPIEGO DELL'INDOMETACINA E DEL METAMIZOLO PER VIA ENDOVENOSA NELLA COLICA RENALE. STUDIO COMPARATIVO]
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