1,720,954 research outputs found
Presentation of a new system in longitudinal tomography (micro layer tomography)
Get PDFTomography or planigraphy is an X-Ray imaging system for preserving a certain plane of a radiography object by diffusing the other planes; however, the wanted plane does not obtain an optimum sharpness. Meanwhile, relatively nearer points to the rotating axes fixed point have lesser linear velocity than those of lying further from fixed point, consequently, Tomographic Bluring (obscuring) occur gradually, that gives rise the wanted plane to be somehow blurred that is known as "tomographic blurring", hence the clinical value of the image is diminished.This innovation could be an approach to improve current tomography systems by increasing image resolution and deep resolution and cost reduction. Micro layer tomography with benefit of fast X –Ray rotating velocity without tube movement has been designed to make images with deep resolution of millimeter fraction whilst, there is no need of digital images reconstruction instruments that allows statistical errors to fall off about zero, and high resolution images could be prepared in all planes (coronal, sagital and cross sectional. Likewise, the patient treatment and the system maintenance cost are much less by many degrees compared with those in CT scan and MRI. In this system with increasing evolution, quick operation is highly exception, hence the tomographic slices could be prepared in about less than 0.02 second. The laboratory samples of this system have been a unique result for proving the new device preference
Increasing of radiographic clinical value by using of Radio Photo Electrostatic imaging system (Xeroradiography)
Get PDF Ordinary Radiographic film sensitive emulsion is formed by crystals which are composed by millions of ions. According to the film texture, image constructive units number that interfere the image resolution are not increased more than a certain limitation in area unite. This innovation is to present an imaging system that to compare with common similar system has precedence such as highly image resolution, image edge sharpnessenhancement, contrast improvement, patient does reduction, rapid processing and cost decrease.The "Xero" technique is different physical method for imaging procedures in which instead of using the photochemical function, electrostatic effect has been used. The latent electrostatic images develop through toner powder, Because the toner powder particles are fine grain as small as a few compound molecules, Consequently, in the new method, image constructive units number which are described as the toner powder particles are much many more in number than crystals of radiographic films. Xeroradiophotography system is designed and constructed based on xero physical phenomenon in which image can be formed by taking advantage of both, X-Ray and visible light complex procedure for the purpose of X-Rays quality and patients body tissue side effect reduction at the time of exposure. This system has already been made as the first archetype in the world that is possible for optimum improving soon
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
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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