1,721,028 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
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
Multi-proxy stable isotope analyses of dentine microsections reveal diachronic changes in life history adaptations, mobility, and tuberculosis-induced wasting in prehistoric Liguria (Finale Ligure, Italy, northwestern Mediterranean)
Full text linkObjective: To reconstruct breastfeeding and weaning practices, metabolic stress including tuberculosis-induced wasting, and residential mobility of children in Neolithic and Metal Ages to infer their local ecologies. Materials: Seven permanent teeth from individuals dated to the Neolithic, Copper, Bronze, and Iron Ages buried in nearby caves in western Liguria, Italy. Methods: Carbon, nitrogen, and sulfur stable isotope analyses on dentine microsections. Tooth maturation was used to calculate age at death. Results: Two Neolithic children present longer pattern of weaning and appear to have been weaned using animal protein in contrast to the earlier weaning of Metal Ages children, which were probably weaned with vegetable resources. Sulfur isotopes suggest local origin of Neolithic and Cooper Age children, and non-local origins for Bronze and Iron Age children. Intense catabolism in the last two years is apparent in the adolescent with tuberculosis. Conclusions: Shortening in weaning patterns during the Metal Ages are likely driven by the intensification of agricultural practices and cultivation of new crops during Bronze and Iron Ages. Neolithic food choices and delayed weaning patterns may represent one of the strategies to maximize growth and immune potential in a local economy/ecology with high-infectious load. Tuberculosis was a chronic and long-lasting disease. Significance: The first combined carbon, nitrogen, and sulfur analysis on prehistoric dentine microsections revealing changing human life history adaptations within the same region. Limitations: Small sample size. Suggestions for further research: Increase the sulfur isotope dataset, use new EA-IRMS equipment, and provide data on amino acid to better define weaning food composition
Investigating the diet of Mesolithic groups in the Southern Alps: An attempt using stable carbon and nitrogen isotope analyses
No full textStable isotopic data (δ13C; δ15N) were obtained from Mesolithic human and faunal remains from northeastern Italy in order to document the human diet and provide information on the relationship between landscape use and subsistence strategies. The bone samples were from an adult female individual (Early Mesolithic, Late Sauveterrian) buried at Vatte di Zambana (Trento), an adult male (Late Mesolithic, Castelnovian) buried at Mondeval de Sora (Belluno), and an adult female from Mezzocorona Borgonuovo (Trento). For the latter, the stratigraphic position of the burial pit and evidence of the associated ritual suggest a Mesolithic attribution. Carbon (13C/12C) and nitrogen (15N/ 14N) stable isotope compositions of human bone collagen were compared with those of animal remains from different taxa found in stratigraphic association with the burial. The isotopic data and the Bayesian model developed from the latter and from data in the literature indicate a very significant proportion of terrestrial resources in the protein fraction of the human diet, particularly from red deer compared to other ungulates and potentially from freshwater fish and small mammals. These results add to the information provided by zooarchaeological studies and reopen the debate on the role of secondary resources such as chamois, ibex, small mammals and fish, such as pike, in the diet of these mobile human societies. However, as this is a preliminary study based on a very small sample size, interpretations should be considered with caution.Les compositions isotopiques en carbone et en azote (δ13C ; δ15N) ont été mesurées sur des restes osseux humains et animaux du Mésolithique dans le nord-est de l’Italie afin de documenter l’alimentation de ces dernières communautés de chasseurs-cueilleurs et les liens entre l’environnement et les stratégies de subsistance. Les restes osseux analysés proviennent d’une femme adulte (Mésolithique ancien, Sauveterrien récent) inhumée à Vatte di Zambana (Trento), d’un homme adulte (Mésolithique récent, Castelnovien) inhumé à Mondeval de Sora (Belluno) et d’une femme adulte du site de Mezzocorona-Borgonuovo (Trento). La position stratigraphique de la sépulture à Mezzocorona-Borgonuovo ainsi que les pratiques funéraires suggèrent une attribution au Mésolithique. Les ratios isotopiques du carbone et de l’azote du collagène osseux des sujets humains ont été comparés avec ceux d’animaux de différentes espèces associés stratigraphiquement aux sépultures. Les résultats isotopiques ainsi qu’un modèle bayésien, réalisé à partir de ces données et celles de la littérature, indiquent une contribution très significative des protéines animales du milieu terrestre, et surtout la consommation importante de cerfs par rapport aux autres ongulés, ainsi qu’un rôle potentiel des poissons d’eau douce et de petits mammifères. Ces données complètent les informations apportées par les études archéozoologiques et relancent la discussion sur le rôle secondaire que peuvent avoir le chamois, l’ibex, les petits mammifères et les ressources aquatiques, comme le brochet, dans la subsistance de ces nomades. Cette étude reste toutefois préliminaire et le faible corpus d’échantillons analysés nous amène à considérer ces interprétations avec prudence
An unusual surgical treatment of the skull following trauma during the Copper Age (IV millennium B.C.) in Italy
No full textA growing body of evidence, drawn from ancient human remains and from ethnographic
accounts, greatly changed our views on past and “traditional” medicine. Surgical treatment of the skull, requiring intimate anatomical knowledge and high skills, has been very influential in that process. Forms of trephination, carried out in order to remove part of the injured skull, are documented since the Neolithic through historical times and in recent ethnographic reports.
The case presented here provides evidence of a less invasive technique applied to the skull of an adult individual found during archeological excavations in a cave deposit (Garbu du Surdu, Finale Ligure, Savona, Italy). A 14C AMS date
obtained from a fragment of the mandible (Erl-13879: 4624 +/- 21 BP) points to a calibrated age range between 3527-3328 BC, placing the
material at the beginning of the Copper Age, in agreement with associated archaeological
remains that include decorated pottery fragments
and shell ornaments. The skull was lying on the
surface deposit among other bones belonging to at least six individuals whose inhumations were strongly disturbed by natural events. The commingled state of the material made it impossible
to associate any of the postcranial bones to this
specific skull. Thus, in the absence of hip bones, sex attribution remains uncertain, although
a diagnosis of female is suggested by cranial
characteristics such as
frontal and parietal bossing, weak glabella and supraorbital ridges, and small mastoid processes.
The skull is affected by a left temporal bone
fracture healed with loss of bony fragments. The squama appears slightly depressed
and, radiographically, shows two main lines of fusion radiating from the lower part of the bone where three lacunae can be observed. On
the parietal bone, immediately above the area
affected by trauma, the skull exhibits two regularly
curved grooves. One, about 3 cm long, starts from the posterior border of the squamosal suture; the other, 9 cm long, runs above the first and reaches the coronal suture. Remodelling of
compacta indicates that the two incisions were made during life. This case provides the first evidence of such a treatment of an injured skull and proves once more the therapeutic knowledge of prehistoric populations, emphasizing their ability to modulate surgical procedures according to specific needs
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
The re-discovery of Arma dell'Aquila (Finale Ligure, Italy): New insights on Neolithic funerary behavior from the sixth millennium BCE in the north-western Mediterranean
No full textEvidence of Neolithic occupation at Arma dell'Aquila (Finale Ligure, Italy) had been unearthed in the 1930s, with the discovery of nine burials and a number of scattered human remains. The material, however, had never been systematically studied and characterized chronologically until recently. We performed a complete re-assessment of funerary behavior at the site, and studied for the first time the scattered human remains, cross-referencing the anthropological data with the spatial and stratigraphic information contained in the original excavation diaries, and with new direct radiocarbon dates on human bone. Results reveal the funerary use of the site throughout the sixth millennium BCE, when various cultural horizons belonging to the Impresso-Cardial cultural complex have succeeded one another, and during the fifth millennium BCE, when the Square Mouthed Culture was attested in Liguria. Five burials spanning the second half of the sixth millennium BCE were aligned head-against-head and feet-against-feet, crouched on their left side, and may be part of an organized funerary space used over a relatively long period of time. Among the nine individuals recognized from the scattered human remains, three date to c. 5750-5650 BCE, and represent the oldest human remains from a Neolithic context in the north-western Mediterranean. Arma dell'Aquila now constitutes an important source of information on the funerary behavior and biological makeup of Neolithic people of the sixth millennium BCE, a period for which little information was previously present in the region
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