1,720,985 research outputs found
Motori sincroni lineari a magneti permanenti per l’automazione”, Rivista Automazione e Strumentazione
No full textNel settore dell’automazione industriale, i motori sincroni lineari a magneti permanenti possono rappresentare una valida alternativa alle tradizionali macchine elettriche rotanti.
Il dimensionamento di questa particolare tipologia di motori deve essere abbastanza accurato e pertanto e’ stata messa a punto una procedura di calcolo, basata sul metodo agli Elementi Finiti, che consente di ricercare le soluzioni progettuali piu’ idonee agli impieghi specifici.
A titolo di esempio viene presentato il progetto di un motore sincrono lineare a magneti permanenti per la movimentazione assi
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
[Maxillofacial fractures in children].
No full textBACKGROUND: Facial traumas in the younger population involve esthetic and functional matters. According to the international bibliography these problems are due to the fixation technique employed and to a delayed surgical treatment. METHODS: This article contains a list of 68 pediatric facial fractures treated at the Maxillofacial Department of the University of Rome "La Sapienza" including diagnosis and therapy over a period of 16 years (January 1981-October 1997). RESULTS: The results of this research show that the ability to treat such traumas is based on the early and careful identification of the fracture and on the choice of the best therapy to carry out according to the patient's age and with the fracture site pattern. RIF fixation is good to obtain healing in adults, but it may be responsible of disturbances in bone tissues growth. Hence, it was used in selected cases only, in order to avoid bone growth restriction as stressed in international bibliography. CONCLUSIONS: A delayed surgical repair of pediatric facial fractures does not guarantee the return to a correct functionally and to an appropriate esthetic feature
Facial nerve functionality after parotid tumors surgery
No full textThe purpose of this study is to show the connection among tumor histology, surgical treatments and facial nerve postoperative functionality. A retrospective review was conducted on 69 patients with benign and malignant parotid tumors: they underwent surgical treatment for benign and malignant parotid tumors at the Maxillofacial Division of Rome University "La Sapienza" from 1988 to 1997. In our series of patients, we performed conservative superficial parotidectomy, conservative total parotidectomy and radical parotidectomy. Tumor enucleation was reserved for those neoplasms with a limited and restricted mass. The surgical approach was based on mass extension and on histopathologic features. Our findings showed that a careful and a timely diagnosis is very important in order to select a conservative surgical treatment for benign and intermediate grade of malignancy tumors with limited dimensions. Most aggressive histological types, and large mass dimensions require a radical treatment with consequent facial nerve postoperative dysfunctions. Our experience demonstrates that this surgical approach provides a very high rate of success in the cure of tumors and a low rate of facial nerve postoperative dysfunctions
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
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