1,720,977 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
A comparison between the results of tissue analysis by means of power spectra and the hystological structure of choroidal melanomas.
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Rapidly growing choroidal metastasis: Case report
No full textA rapidly growing choroidal metastasis from an occult carcinoma is described. The patient was first seen with a loss of visual acuity. The fundus examination showed a non-pigmented solid mass located at the posterior pole. Clinical history, echographic characteristics and tumour growth kinetics are described in detail
Echographic evaluation of choroidal melanomas treated with ruthenium- 106 plaques: The treatment failures
No full textFrom July 1990 to October 1995 we treated 45 patients with choroidal melanomas using ruthenium-106 plaques. The population mean age was 59.2 ± 10.4 years. In this paper, the authors describe in detail their clinical management and follow-up timing. They also report on the echographic pattern change after treatment and the clinical history of some failure cases
Ultrasound tissue characterization of Choroidal diseases by means of computerized spectral analysis.
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Three cases of choroidal metastases with rapid growth and atypical echographic characteristics.
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