1,721,134 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
Selvmordsrisiko blandt personer diagnosticeret med demens
No full textFormål: Studiet undersøger risikoen for selvmord blandt personer med hospitalsdiagnosticeret demens og dets sammenhæng med depression. Data og metode: Individbaserede registerdata dækkende alle personer fyldt 50 år og derover bosat i Danmark i perioden 1. januar 1990 til 31. december 2000 (N = 2.474.767) blev analyseret. Eventhistory analyseteknik blev benyttet til at beregne relative risiko for død af selvmord i multivariable analyser. Resultat: I alt 18.648.875 personår blev observeret over det 11-årige studieforløb. Der forekom 136 selvmord blandt personer med demens diagnosticeret ved hospitalsindlæggelse. Den relative risiko for selvmord blandt mænd og kvinder i alderen 50–69 år med demens var henholdsvis 8,5 [CI-95%: 6,3–11,3] og 10,8 [CI-95%:7,4–15,7]. Personer fyldt 70 år og derover med demensdiagnoser havde en tre gange højere selvmordsrisiko end personer uden demens. Den forhøjede selvmordsrisiko blandt personer med demens forblev signifikant også efter justering for depressionsdiagnoser. Henholdsvis 40% og 38% af selvmord blandt mænd og kvinder med demens fandt sted inden for det første år efter demensdiagnosen første gang blev konstateret. Konklusion: Demens, defineret som diagnosticeret ved hospitalsindlæggelse, var forbundet med en højere selvmordsrisiko for personer fyldt 50 år og derover. Særligt tiden efter første diagnose og dobbeltdiagnose med depression korrelerede med en forhøjet risiko for selvmord. Objective: The current study aims to examine the risk of suicide in persons diagnosed with dementia during a hospitalization and its relationship to mood disorders. Data and method: Individual-level register data on all persons aged 50+ living in Denmark during January 1, 1990 through December 31, 2000 (N = 2,474,767) were included in the analysis. Event-history analysis was applied to calculate relative risks of dying by suicide while controlling for select timevarying covariates Results: A total of 18,648,875 personyears were observed during the 11-year study period. During this period, 136 persons who previously were diagnosed with dementia died by suicide. Men and women aged 50–69 years with hospital presentations of dementia had a relative suicide risk of 8.5 [CI-95%: 6.3–11.3] and 10.8 [CI-95%:7.4–15.7], respecti-vely. Those who aged 70 or older with dementia had a threefold higher risk than persons with no dementia. The risk among persons with dementia remained significant when controlling for diag-noses of mood disorders. As many as 40% of the men and 38% of the women who died by suicide died within the first year after initial dementia diagnosis. Conclusions: Dementia, determined during hospitalization, was associated with an elevated risk of suicide for older adults. Particularly, time shortly after initial diagnosis and presence of mood disorders was found to correlate with an increased risk of suicide
Lyme Borreliosis and Associations With Mental Disorders and Suicidal Behavior: A Nationwide Danish Cohort Study
No full textObjective:
Lyme borreliosis is a tick-borne infectious disease that may confer an increased risk of mental disorders, but previous studies have been hampered by methodological limitations, including small sample sizes. The authors used a nationwide retrospective cohort study design to examine rates of mental disorders following Lyme borreliosis.
Methods:
Using Denmark’s National Patient Register and the Psychiatric Central Research Register, and including all persons living in Denmark from 1994 through 2016 (N=6,945,837), the authors assessed the risk of mental disorders and suicidal behaviors among all individuals diagnosed with Lyme borreliosis in inpatient and outpatient hospital contacts (N=12,156). Incidence rate ratios (IRRs) were calculated by Poisson regression analyses.
Results:
Individuals with Lyme borreliosis had higher rates of any mental disorder (IRR=1.28, 95% CI=1.20, 1.37), of affective disorders (IRR=1.42, 95% CI=1.27, 1.59), of suicide attempts (IRR=2.01, 95% CI=1.58, 2.55), and of death by suicide (IRR=1.75, 95% CI=1.18, 2.58) compared with those without Lyme borreliosis. The 6-month interval after diagnosis was associated with the highest rate of any mental disorder (IRR=1.96, 95% CI=1.53, 2.52), and the first 3 years after diagnosis was associated with the highest rate of suicide (IRR=2.41, 95% CI=1.25, 4.62). Having more than one episode of Lyme borreliosis was associated with increased incidence rate ratios for mental disorders, affective disorders, and suicide attempts, but not for death by suicide.
Conclusions:
Individuals diagnosed with Lyme borreliosis in the hospital setting had an increased risk of mental disorders, affective disorders, suicide attempts, and suicide. Although the absolute population risk is low, clinicians should be aware of potential psychiatric sequelae of this global disease
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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