1,721,035 research outputs found
Space-temporal analysis of radiocarbon evidence and associated archaeological record: from Danube to Ebro rivers and from Bronze to Iron Ages
Get PDFIn this thesis we have approached the historical problem of cultural standardization at the end of Bronze Age. In particular, we have analyzed phenomena of expansion and adoption of innovation which took place in the 2nd millennium BC in Europe.
To tackle this issue, we have decided to follow a quantitative approach. From a methodological point of view, the starting point has been the development of the EUBAR database which collects more than 1700 14C dates of georeferenced archaeological contexts, defined by a set of variables of presence/absence of some functional types. The analyzed region embraces an area from the Ebro to the Danube River (namely, NE Iberian Peninsula, Southern France, Northern Italy, Switzerland, Austria and Southern Germany); the time-span is 1750-750 BC. The critical analysis of each dating, concerning the taphonomic and stratigraphic information of each sample, represents the backbone of the database.
The first goal has been to propose a new chronological model based on Bayesian statistical analysis of 14C dates from reliable archaeological contexts in northern Italy and southern France. Although the number of reliable dates for macroscale research remains low, it has been possible to develop four different models with the software OxCal, two contiguous ones and two sequential ones. Focusing on descriptive statistics, the 14C chronology of northern Italy seemed to be slightly higher than the conventional one, while that of southern France is confirmed by the Bayesian models. In both cases, the results claim the absolute necessity of an increase in the amount of 14C dates from selected archaeological contexts.
The second goal has been to model demographic continuities and discontinuities between 1800 and 800 BC; the last term is due to the “Hallstatt disaster”. Through the analysis of frecuency of radiocarbon dates collected in the EUBAR database we have infered population stationarity on a macro-scale from the Danube to the Ebro. On the contrary, summed probability calibrated distributions (SCPDs) and histograms of medians show that episodes of change express locally.
The third goal has been to detect three phenomena of adoption of innovation which took place in the 2nd millennium BC, i.e. cremation burials, vases with handles with vertical expansion and metal knives. In particular we have been able to observe that the adoption of cremation rite within the Urnfield culture followed a positive exponential trend on a macro-scale with different beginnings in different regions. Such an assumption allowed modeling the spatio-temporal diffusion of cremation burials which has shown to be characterized by a clear east to west gradient from the North-Western Alpine region to the NE of Iberian Peninsula. The same east to west directivity has been recognized for vases with handles with vertical expansion.
Eventually, the thesis proposes the architecture of an Agent Based Model for explaining phenomena of diffusion and adoption of innovation in early complex societies
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
Measuring, Counting and Explaining: An Introduction to Mathematics in Archaeology
No full text“What is archaeology about?” asks the professional mathematician shocked by the use of numbers, functions, equations, probabilities, set-theoretic propositions and the like by archaeologists. The answer is pretty simple. “Archaeology is what archaeologists do” (Gardin 1980). We excavate and fi nd stones, pottery sherds, animal and human bones, the remains of ancient buildings, what our ancestors made and discarded at some time, etc. These are our objects of study, but not our objective. The goal of archaeology is to describe the past, that is to say, to fi nd out what people did some time ago and why. Then, where is the place for mathematics? Why a book with such an unusual title: “Mathematics and Archaeology”? .Fil: Barceló, Joan Anton. Universitat Autònoma de Barcelona; EspañaFil: Achino, Katia F.. Universitat Autònoma de Barcelona; EspañaFil: Bogdanovic, Igor. Universitat Autònoma de Barcelona; EspañaFil: Capuzzo, Giacomo. Universitat Autònoma de Barcelona; EspañaFil: del Castillo Bernal, María Florencia. Universitat Autònoma de Barcelona; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Moitinho de Almeida, Vera. Universitat Autònoma de Barcelona; EspañaFil: Negre Pérez, Joan. Universitat Autònoma de Barcelona; España. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
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