1,721,089 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
THE LONG-TERM OUTCOME OF PATIENTS WITH GLYCOGEN-STORAGE-DISEASE TYPE-IA
No full textForty-one patients (16 females and 25 males) over 10 years of age from five different European centres were studied retrospectively. Of those patients 19 were below the 3rd percentile for height. Hypoglycaemia was still reported in 6 patients. Hepatomegaly was present in 39 out of 40, while 11 out of 27 reported patients had marked hepatomegaly (> 10 cm below the costal margin in the midclavicular line). Adenomas were detected in 11 out of 39 patients, alpha-1-fetoprotein was reported to be within normal limits in a total of 22 patients of whom 6 had adenomas. Blood cholesterol concentration was elevated in 31 out of 38 patients, in 7 greater than 10.O mmol/l. Blood triglycerides were elevated in 29 out of 34 patients, in 8 patients greater than 4.O mmol/l. Blood uric acid concentration was elevated in 19 out of 35 patients, 12 of them being treated with allopurinol. Mental development was reported to be normal in 32 out of 37 patients. Since limited information on treatment was available no significant differences between treatment groups could be detected. In order to evaluate the effect of treatment, 20 patients (10 females and 10 males) of one centre were studied before and after at least 5 years of treatment. This treatment consisted of frequent feedings during the day together with nocturnal gastric drip feeding. Patients were divided into responders (n = 16) and non-responders (n = 4) depending on their (change in) SDS (standard deviation score) for height. Liver adenomas were detected in 3 patients, of which one was a non-responder. Alpha-fetoprotein was normal in all patients. With increasing age a gradual increase in blood lipids and some apolipoproteins could be detected, non-responders tending to have higher concentrations of triglycerides, cholesterol, Apo-CIII and Apo-E. Non-responders had significantly higher ''fasting'' blood lactate and nocturnal urinary lactate concentrations. Virtually all patients had abnormally elevated glomerular filtration rates, but no significant difference was found between responders and non-responders. Older patients may develop normochromic anaemia. Thrombocyte aggregation was abnormal in 4 out of 16 patients, of which one was a non-responder
THE LONG-TERM OUTCOME OF PATIENTS WITH GLYCOGEN-STORAGE-DISEASE TYPE-IA
No full textForty-one patients (16 females and 25 males) over 10 years of age from five different European centres were studied retrospectively. Of those patients 19 were below the 3rd percentile for height. Hypoglycaemia was still reported in 6 patients. Hepatomegaly was present in 39 out of 40, while 11 out of 27 reported patients had marked hepatomegaly (> 10 cm below the costal margin in the midclavicular line). Adenomas were detected in 11 out of 39 patients, alpha-1-fetoprotein was reported to be within normal limits in a total of 22 patients of whom 6 had adenomas. Blood cholesterol concentration was elevated in 31 out of 38 patients, in 7 greater than 10.O mmol/l. Blood triglycerides were elevated in 29 out of 34 patients, in 8 patients greater than 4.O mmol/l. Blood uric acid concentration was elevated in 19 out of 35 patients, 12 of them being treated with allopurinol. Mental development was reported to be normal in 32 out of 37 patients. Since limited information on treatment was available no significant differences between treatment groups could be detected. In order to evaluate the effect of treatment, 20 patients (10 females and 10 males) of one centre were studied before and after at least 5 years of treatment. This treatment consisted of frequent feedings during the day together with nocturnal gastric drip feeding. Patients were divided into responders (n = 16) and non-responders (n = 4) depending on their (change in) SDS (standard deviation score) for height. Liver adenomas were detected in 3 patients, of which one was a non-responder. Alpha-fetoprotein was normal in all patients. With increasing age a gradual increase in blood lipids and some apolipoproteins could be detected, non-responders tending to have higher concentrations of triglycerides, cholesterol, Apo-CIII and Apo-E. Non-responders had significantly higher ''fasting'' blood lactate and nocturnal urinary lactate concentrations. Virtually all patients had abnormally elevated glomerular filtration rates, but no significant difference was found between responders and non-responders. Older patients may develop normochromic anaemia. Thrombocyte aggregation was abnormal in 4 out of 16 patients, of which one was a non-responder.</p
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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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