1,721,264 research outputs found
Contributi alle ricerche paleoambientali nel bacino del Palù di Livenza (margine prealpino friulano)
No full textAnalisi sedimentologica e micromorfologica delle unità epigravettiane di Riparo Cogola – Carbonare di Folgaria (Trento)
No full textAnalisi sedimentologica e micromorfologica delle unità epigravettiane di Riparo Cogola – Carbonare
di Folgaria (Trento) - Questo lavoro presenta i risultati dello studio geoarcheologico dei suoli d’abitato epigravettiani
datati al Dryas recente (US 19) e al Preboreale (US 18) di Riparo Cogola. Sono state condotte analisi fisiche e chimiche
di routine, deteterminazioni mineralogiche e analisi micromorfologiche che evidenziano processi di formazione
complessi, caratterizzati dall’intervento di fattori sedimentari, pedogenici e antropogenici a intensità e modalità
variabili nello spazio e nel tempo. L’interpretazione suggerisce una sequenza di eventi a carattere ciclico che hanno
comportato: 1) distacchi e alterazioni crioclastiche limitati alle fasi di abbandono del riparo con seppellimento dei
livelli antropici precedenti; 2) apporto progressivo di sedimento alloctono ad opera del calpestio sulle superfici d’uso
e genesi di microstruttura lamellare associata a porosità vescicolare organizzata planarmente, conseguenti al calpestio
e ai cicli di gelo-disgelo post-deposizionali; 3) aggradazione dei suoli d’abitato con abbandono di manufatti litici e
resti faunistici ad assetto orizzontale che hanno subìto fratturazione in situ, abbondante sostanza organica, carboni;
4) evoluzione dei suoli d’abitato determinata dallo sviluppo dell’attività di lombrichi contemporanea alla frequentazione
antropica, che ha favorito la rapida umificazione e l’incorporazione della sostanza organica nella matrice; la
dissoluzione dei carbonati e la conseguente precipitazione di sparite, comuni a tutta la sequenza stratigrafica, sono
da attribuire principalmente all’effetto di acidi umici prodotti nell’orizzonte superficiale della sequenza del riparo;
5) incipiente azione crioergica postdeposizionale con verticalizzazioni e sollevamento di clasti e, prevalentemente
nelle fasi di abbandono del riparo, genesi di una microstruttura lamellare ereditata dall’attività di calpestio
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
Instrumented Treadmill for Cross-Country Skiing Enhanced Training
No full textIn order to meet the need for indoor training, Rodby has developed a special ski-skating treadmill that allows cross-country skiers to test their physical performance under laboratory conditions, using classical and freestyle techniques on roller skis by adjusting both the inclination of the slope as well as its speed. However, both inclination and speed are adjusted manually by an operator or set at the beginning of the test thus making it very difficult to recreate real skiing conditions. Thanks to the cooperation with the Italian national ski team, the treadmill was equipped with some additional sensors that allowed to continuously adjust the slope to simulate a real track of cross-country skiing as well as the speed to account for the different skiing performances of the athletes under test. Both the design of the additional measurement system as well as of the control algorithm is presented
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
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