1,721,092 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 comparative study of canine and feline meningioma classification based on the WHO histological classification system in humans.
No full textThe aim of this study was to compare human and domestic animal WHO histological classification system of meningioma to identify possible critical points in applying human WHO classification to canine and feline meningiomas.
Selected paraffin embedded tissues from 57 canine and 38 feline tumours recorded as meningiomas were used in this study. Based on the current domestic animal WHO histological classification system they had been achieved as benign (38 canine, 34 feline) and malignant (19 canine, 4 feline). All these meningiomas were graded according to the criteria of the latest human WHO international histological classification of CSN tumours as benign (grade I), atypical (grade II) or anaplastic (grade III).
Based on human WHO classification system, histological grading in the dogs indicated 27/57 benign (grade I) (47.3 %), 26/57 atypical (grade II) (45.6 %) and 4/57 anaplastic (grade III) (7.0%) tumours. Eleven tumours recorded as benign meningiomas were graded as grade II, 15 malignant as grade II and 4 malignant as grade III. Two canine meningiomas were classified as chordoid type and graded as grade I. Eight canine meningiomas were classified as papillary; six of them were graded as grade I, the remaining two cases were graded as grade II. In cats histological grading identified 27/38 benign (grade I) (71.05%) and 11/38 atypical (grade II) (28.9%) tumours. Twenty-six tumours classified as benign were graded as grade I while the remaining eight benign-classified tumours as grade II, two malignant as grade I and two malignant as grade II. Based on our results, we believed mitotic index ≥ 4 mitoses/10 HPF and brain invasion are sufficient criteria to identify grade II meningiomas and we suggested patternless sheets alone could be assumed as a criterion to attribute grade II to a meningioma. Interestingly, in the cats, meningiomas of grade III were not detected, confirming the less aggressive behaviour of feline meningioma and suggesting no current grading is applicable to the feline meningioma. Moreover, our results confirmed a higher incidence of canine atypical (grade II) and anaplastic (grade III) meningioma than in humans
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
A Classification-based Approach to Managing a Solver Portfolio for CSPs
No full textThe utility of using portfolios of solvers for constraint satisfaction problems is well reported. We show that when runtimes are properly clustered, simple classification techniques can be used to predict the class of runtime as, for example, short, medium, long, time-out, etc. Based on runtime classifiers we demonstrate a dispatching approach to solving a set of problem instances in order to minimise the average completion time of each instance. We show that this approach significantly out-performs a well-known CSP solver and performs well against an oracle implementation of a solver portfolio
Spongy polioencephalopathy in two Belgian Malinois puppies
No full textSpongy degeneration is seen in prion diseases and in a variety of progressive, invariably lethal neurodegenerative disorders. In various dog breeds it can involve the white or the grey matter. Amongst those involving the gray matter, cases are described in Bull Mastiff, Rottweiler, Saluki, Cocker Spaniel and Australian Cattle dog. A hereditary spongy degeneration has been reported in Malinois puppies, which suffer from congenital tremors with ataxia. In this report we describe two cases of spongy degeneration in Malinois puppies, emphasizing the morphological and immunohistochemical features of the CNS lesions.
A 4-week-old female intact Belgian Malinois puppy was presented for mild depression, tremors of the head, cerebellar ataxia, and progressive ascending paraparesis. Complete blood count and serum biochemistry were normal. Serology for canine distemper virus, Toxoplasma spp. and Neospora spp. was negative. Cerebrospinal fluid showed no abnormalities. Because of the progressive ataxia and development of proprioceptive deficits on all limbs, and poor prognosis, the owners elected for humane euthanasia.
No gross lesions were found in the body, including the brain. Brain, spinal cord, and samples of major organ were fixed in 4% buffered formaldehyde. Transverse sections of brain and spinal cord were embedded in paraffin, sectioned at 5 μm, and stained with hematoxylin and eosin, Luxol fast bleu. Immunohistochemistry for CNPase, Olig2, glial fibrillary acidic protein (GFAP), phosphorylated neurofilaments , heat shock protein (HSP) 70, ubiquitin, ... were performed on selected sections. Lesions were restricted to the brain and were characterized by the presence of bilateral and symmetric large interneuronal vacuoles in the area of cerebellar nuclei, granular cell layer and foliate white matter of the cerebellum.
Lesions detected in these puppies are similar to previously described cases (Cachin et al., 1991, Kleiter et al., 2011); the predominant lesions were found in cerebellar nuclei and flocculonodular cerebellar cortex, whereas spongy degeneration was not detected in the cerebral cortex. These are the first cases of spongy polioencephalopathy of Malinois dogs described in Italy, and the first time that immunohistochemical features are reported
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
Sertoli cell tumour with call-exner-like bodies in a dog
No full textAn histological diagnosis of Sertoli cell tumour and concurrent seminoma was formulated after complete resection of the right testicle in a 8-year-old Doberman. The unusual histological feature of abundant eosinophilic material with a extracellular location forming the Call-Exner-like bodies is reported
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