1,721,046 research outputs found
Inspection Activities on Archaeological Sites in Milan. The Case of Imperial Mausoleum
Full text linkThe project "Milano Archeologia" concerning the ancient remains of the city of Milan in Roman age was based on specific methods and tools, such as the collection of data through the previous archive research, and the feedback of information through inspections and then direct contact with monuments. A very interesting and significant case is the funerary complex area of “San Vittore al Corpo”, in which are also preserved the remains of an impressive Imperial Mausoleum. The curtain, that defines the space of the cemetery from the fourth Century AD, is kept in part below two modern buildings, while the remains of the Mausoleum are located below the present church of St. Victor. The analysis of the data collected allowed us to identify similarities and differences between the structures still visible, for example in the techniques adopted for the elevations or foundations, and it has provided the knowledge necessary to assume concrete solutions to protect and enhance this heritage
Plasma-induced enhancement of UV photoluminescence in ZnO nanowires
No full textThe photoluminescence emission of ZnO nanowires was modified by means of plasma etching, inducing a strong increase in the Near Band Edge emission (NBE) in the UV region (3.26 eV). In contrast, annealing treatment at 600 degrees C quenched the NBE peak. This opens the possibility to modify the emission properties of ZnO nanowires by means of surface treatment, and is of great importance in view of the application of ZnO as an emitting material. ZnO nanowires were prepared by the vapour phase growth technique in a tubular furnace. Morphological and structural characterization was carried out by scanning and transmission electron microscopy, showing no modifications to the morphology and crystalline arrangements after plasma etching. The nanowires are single crystalline with a high aspect ratio and diameters in the 50-100 nm range. The optical properties of the ZnO nanowires were studied by continuous wave photoluminescence (PL). Ar and O-2 plasma etching treatment caused modification of the PL spectrum, inducing a strong enhancement of the NBE peak, and an increased ratio of NBE over Deep Level Emission (DLE), thus indicating a better sample quality after the treatment. The effect of the Ar treatment is higher than the effect of O-2 treatment, since the ratio of NBE : DLE obtained for O-2 plasma etching is smaller than the ratio observed for Ar. Conversely, annealing at 600 degrees C in an O-2 or Ar atmosphere induced the quenching of the NBE and an increase of the DLE in the PL spectrum of the ZnO nanowires. The variations in the spectroscopic features are discussed in terms of hydrogen diffusion and the passivation of states responsible for non-radiative recombination
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
