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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
Inherited copper toxicosis in a Bedlington terrier
No full textInherited copper toxicosis was diagnosed in a Bedlington Terrier using conventional diagnostic methods such as plasma biochemistry, hepatic copper assay, histology and electron microscopy and a recently developed DNA microsatellite marker test. The dog was successfully managed using D-penicillamine and a low copper diet
Histiocytic sarcoma in a one-year-old Springer Spaniel
No full textA one-year-old female Springer Spaniel was presented with a firm mass in the left submandibular region and fixed palpable infraorbital masses. On cytological examination of the submandibular mass, a diagnosis of lymphoblastic lymphosarcoma was proposed. Radiographs revealed multiple pulmonary nodules and a suspicious lytic lesion in the right scapula. Histopathology revealed a pleomorphic arrangement of large round cells with a high mitotic index and high nuclear to cytoplasmic ratios, resembling a malignant histiocytic population. Immunohistochemistry on lung masses at necropsy was inconclusive but consistent with a highly anaplastic malignant neoplasm. Based on the clinical, morphological and histopathological findings, histiocytic sarcoma was diagnosed. Histiocytic sarcoma is extremely rare in dogs of such a young age. No other cases of histiocytic sarcoma in a dog this young were found in an extensive literature review of the subject
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