1,721,012 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
Gonadotropin-releasing hormone-induced partial empty sella clinically mimicking pituitary apoplexy in a woman with a suspected non-secreting macroadenoma.
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Anticonvulsant action of pargyropyranone in various models of experimental epilepsy in the cat
No full textGonadotropin-releasing hormone-induced partial empty sella clinically mimicking pituitary apoplexy in a woman with a suspected non-secreting macroadenoma.
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Prevalence of osteosarcodynapenia in elderly setting in Nursing Home and transitional care: QUS and HG as clinical risk predictors
No full textBackground: Osteoporosis and sarcopenia are prevalent chronic diseases in elderly associated with increased morbidity, disability, mortality and outgrowing socio economic burden.1)
The demography of aging addresses the focus on effective screening and primary preventive strategies to cope with osteo-sarco-dynapenia in order to decrease the incidence of bone fracture as well as to restrain their overall socioeconomic burden.
Objectives: The present study enrolled 50 patients admitted to a transitional care hospital (S.Martino Hospital in Genoa) and set in institutional care (Nursing Home of Genoa) to estimate the prevalence of osteo-sarco-dynapenia through the assessment of quantitative bone ultrasonography (QUS Ge Achilles Lunar) and isometric dynamometer (HG: Hand Grip Strength test) as clinical risk predictors in the examined population.
Methods: The features of patients are reported as follow: 35F e 15M with a mean age of 87,6±1,02 years; a mean comorbidity of 3,8±0,2 diseases; previous hip fracture n23 (46%); mean polypharmacy 8,3±0,35 drugs. All the examined patients were submitted to heel ultrasonography assessment (QUS) for osteoporosis and hand grip test (HG) to assess muscle strength.
All data are presented as mean ±of standard error and linear and non linear regression analysis;
p< 0.05 was considered statistically significant.
Results: The results of the present study are listed as follow:
HG, Kg:
Non fractured subjects: mean 14,3±1 (age adjusted reference >85 yrs: M 22.8-31.3; F 12.9-16.2)
Fractured subjects : mean 11±2 (age adjusted reference >85yrs :M 22.8-31.3; F 12.9-16.2)
QUS:
T-score: mean -4,3± 0,23 ( reference score T score -1.8)
According to literature, the data showed a significant negative correlation between aging and HG
(r=-0.332; p<0.05) and respectively a significant positive correlation between BUA (broad ultrasound attenuation) and HG (r=0.39;p<0.01) and T score e HG (r=0.354;p<0.05).
Conclusions: The study showed the overall prevalence of osteo-sarco-dynapenia in the examined population as well as the effectiveness of QUS and HG as clinical risk predictors.2)
Their handiness, feasibility as non invasive tools strongly recommend their application in the geriatric population particularly in residential setting in order to plan extensive screening programs to act effective primary preventive measures.
References
1) Cooper C, Atkinson EJ, Jacobsen SJ. Population-based study of survival after osteoporotc fractures. American Journal of Epidemiology.1993;137:1001-1005.
2) Marin F, Gonzales-Marcias J, Diez-Perez A. Relationship between bone quantitative ultrasound and fractures: a metanalysis. Journal of Bone and Mineral Research.2006;21:1126-1135
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