1,721,069 research outputs found
In cammino tra aspettative e diritti. Fenomenologia dei flussi migratori e condizione giuridica dello straniero
No full textI fenomeni migratori che segnano la storia recente rappresentano una sfida inedita per gli ordinamenti. Chiamati a regolare i comportamenti di una popolazione con caratteristiche di "fluidità" del tutto inconsuete, i sistemi normativi sembrano progressivamente perdere la capacità di conformare la dinamica delle interazioni sociali ai propri dettati e vivono una tumultuosa evoluzione, condizionata anche dal progressivo logoramento del consenso politico al modello dell'integrazione. I saggi raccolti nel volume rendono conto della complessità di questa sfida, raccontando il movimento degli uomini attraverso il globo, il complesso intersecarsi del loro cammino con il diritto, le tensioni determinate dalle migrazioni di massa e le relative reazioni ordinamentali
Analisi del comportamento strutturale della cupola di S.Sofia ad Istanbul sotto l’effetto dell’azione sismica
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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
Growth and yield in irrigated and non-irrigated olive trees cultivar Coratina over four years after planting
No full textThis study aimed to verify the cumulative effects of water deficits over four years on canopy and root growth and on yield in olive trees cv. Coratina. The trials were carried out at Gaudiano di Lavello (N 41° 03', E 15° 42') on trees planted in 1992 at distances of 6 x 6 m. During the first year of growth all plants were irrigated when soil water potential at 35 cm depth reached -0.08 MPa. From the second year on no water was applied to part of the grove, while the rest was irrigated according to the criterion used in the first year. At the end of the first year the soil volume explored by roots was 0.5 m3 p-1; in the second and third years the irrigated plants explored 2.9 and 8.6 m3 p-1 respectively, compared to 2.3 and 5.1 m3 p-1 in the dry treatment. Leaf area after the first year of growth was 0.6 m2 p-1. In the three subsequent years the irrigated trees showed leaf areas of 1.9, 6.1 and 6.9 m2 p-1, respectively, against 1.2, 3.8 and 4.9 m2 p-1 for the dry plants. The root-canopy ratio was 0.19 (g g-1 of dry weight) in the first year, and in the second and third years 0.18 and 0.16 (g g-1) for irrigated plants against 0.28 and 0.25 (g g-1) for dry ones. Yield from irrigated trees was 131, 548 and 1460 kg ha-1, in the second, third and fourth years respectively, while non-irrigated plants produced 39, 100 and 1020 kg ha-1. The results show that water deficit reduced soil volume explored by roots, leaf area and yield. The most marked effect was on canopy growth, making for a modified roots-canopy ratio compared to irrigated plants
Characterization of training system in relation to water use efficiency in apricot and kiwifruit plants
No full textTrials were carried out in Southern Italy on apricot plants (cv. Tirynthos) trained to transverse Y and kiwifruit vines (cv. Hayward) trained to pergola. Leaf area, light availability and gas exchange measurements were performed during different times of the growing season on both orchards. In kiwifruit vines at maximum LAI (3.7), reached in July, the shaded leaves were 60% of the total. During the annual cycle, exposed leaves showed a photosynthetic rate 50 times higher than shaded ones, while transpiration rate was only twice higher. Average WUE value in exposed leaves was 20 times higher than in shaded leaves. Apricot trees reached maximum LAI (4.7) in July with 44% of the leaves exposed (> 40% of incident sunlight), 20% of intermediate leaves (20-40 % of incident sunlight ) and 36% of shaded leaves (<20% of incident sunlight). The transpiration and photosynthesis in apricot leaves showed the same behavior as in kiwifruit leaves. The exposed leaves showed a WUE 3 up to 8 times higher than that of shaded ones. Shaded leaves consume 19% and 38% of the total transpired water respectively in apricot and kiwifruit during the day and, if we consider the night respiration, they do not contribute in any way to the energy balance of the whole plant. Shaded leaves were not a source but another sink for the plant and through an appropriate choice of canopy architecture and its correct management, in particular with summer pruning, it would be possible to improve the daily carbon balance and WUE
La misura della fotosintesi in campo. Innovazioni strumentali nei sistemi per singola foglia e intera chioma.
No full textDispelling 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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