1,721,451 research outputs found
Morphological observations of immunobiology of laryngeal cancer. Evaluation of the defensive activity of immunocompetent cells present in tumour stroma
No full textOtosclerosi: indagine morfologica e microchimica quantitativa
No full textThe degree of mineralization in 35 footplates (28 otosclerotic obtained from patients who underwent stapedectomy and 6 normal obtained from patiens who underwent labirintectomy for sever Menieres disease, as control group) has been detected by quantitaive electron microprobe analysis.
The optimal section of samples for the analysis were obtained by grinding the footplates (embedded in Epoxic resin) with Boron Carbide and then polished with a diamond past.
A scanning electron microscope (SEC) ETEC autoscan, operating at 15 KV, and an energy dispersive system (EDS) EEDS ORTEC for the X-ray analysis, were employed to analyze elements with athomic number higher than 10.
Natural chloro.apatite was used as standard and a modified computer program was used to convert the X-ray counts to wight percent oxides.
Several points of analysis were carried out between core and rim, or rim to rim, of samples; this method gives an accurate evaluation of spot chemical composition.
The total ammount of demineralized tissue (Δ), the Ca/P ratio (competent to Octacalciumphosphate OCP) increased and well-defined Aluminium content. Sclerotic footplates show a modified structure due to numerous irregular lacunae enclosed by well mineralized bone with Ca/P ratio (copetent to Hydroxyapatite HA) and absence of aluminium. Even though at present we cannot explain the presence of Aluminium, the finding of OCP in the spongiotic lesion may play an important role in the explanation of chrystallochemical action of Sodium FLuoride in the treatment of otosclerosis
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
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
Auditory brainstem evoked responses in the clinical evaluation and follow-up of insulin-dependent diabetic subjects
No full textIn the last few years the use of ABR in the dysmetabolic encephalopathies has aroused considerable interest. Even though brainstem involvement in these syndromes is not yet entirely understood, ABR techniques have provided new and important insights. We studied 60 insulin-dependent diabetic subjects, 29 females and 31 males aged to 17 to 55 yrs, and observed ABR abnormalities in 28.2% of the cases. This impairment affects the I-V interval or central transmission time (CTT), which is considered the most reliable index of brainstem function. The ABR pattern was considered pathologic when the CTT was due 2DS as compared with a sex- and age-matched control. Follow-up studies performed on 20 of these subjects revealed no significant variation in the ABR tracing. This fact, together with the absence or correlation between ABR involvement and metabolic control and glycemia level during the test, could be attributed to a 'structural' damage of the brainstem tissue. In diabetics, we observed a significant correlation (p less than 0.05) between I-V interval shift and an EMG-proved reduction in motor conduction velocity (MCV) of the peroneal nerve. We also found a high incidence of ABR impairment (53%) in diabetics with cardiovascular autonomic failure
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