1,720,953 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
Contributo allo sviluppo di un modello numerico di flusso del sistema acquifero dell'Isola di Pianosa (Arcipelago Toscano)
No full textL’obbiettivo principale di questo lavoro di Tesi di Laurea è la creazione di un modello numerico di flusso del sistema acquifero dell’Isola di Pianosa, basato su un solido modello idrogeologico concettuale, definito utilizzando un approccio multidisciplinare che ha preso in considerazione aspetti geologico-stratigrafici, idrogeologici, geofisici, geochimici e meteoclimatici. Nello specifico, particolare importanza è stata rivolta alla costruzione del modello geologico 3D del sistema acquifero stesso.
Per lo sviluppo del modello concettuale sono stati utilizzati i dati provenienti da studi e campagne pregresse, oltre a quelli derivanti da una ulteriore campagna idrogeologica-geochimica effettuata in ottobre 2022 nell’ambito di questo lavoro di tesi. Per la determinazione dell’assetto idrostrutturale e la creazione del modello geologico solido 3D sono stati utilizzati ed elaborati i dati provenienti dalle stratigrafie pregresse disponibili e di un carotaggio continuo recentemente realizzato, le misure di strato ricavate dalla carta geologica CARG, la colonna stratigrafica relativa alla Formazione del Golfo della Botte ricostruita dagli affioramenti lungo la costa occidentale dell’isola e i dati di una campagna geofisica pregressa. Sono stati inoltre elaborati i dati relativi alle misure dei livelli piezometrici, dei parametri fisico-chimici e dati geochimici sia pregressi che recenti, con la creazione di carte piezometriche, diagrammi di classificazione e diagrammi di correlazione. In particolare, a partire da queste elaborazioni, sembrerebbe che la ricarica dell’acquifero superficiale avvenga principalmente per infiltrazione delle acque meteoriche locali, mentre la ricarica degli acquiferi profondi risulterebbe in gran parte legata alla connessione idraulica che esiste tra le calcareniti ospitanti la falda freatica e i conglomerati ospitanti gli acquiferi confinati. I dati geochimici non escludono inoltre un’alimentazione di quest’ultimi da parte di una circolazione profonda a carattere regionale. È stato, quindi, calcolato il bilancio idrico in cui sono state stimate le principali voci in entrata e in uscita dal sistema acquifero (per il periodo 2015-2022). Per la stima delle precipitazioni efficaci sono stati utilizzati i dati di temperatura e precipitazioni misurati direttamente sull’isola, utilizzando il metodo di Thornthwaite per il calcolo dell’evapotraspirazione reale e potenziale. L’infiltrazione efficace è stata stimata considerando il deflusso superficiale nullo. Ulteriore voce in uscita è il volume di acqua emunto dal pozzo PN3, unico pozzo attivo sull’isola, stimata sulla base dei periodi di accensione del pozzo stesso.
Sulla base del modello concettuale elaborato è stato costruito un modello numerico di flusso in stato stazionario del sistema acquifero, utilizzando il codice di calcolo MODFLOW e l’interfaccia grafica Groundwater Vista. La discretizzazione spaziale del dominio e l’assegnazione delle zone di conducibilità idraulica sono stati creati sulla base del modello solido 3D costruito durante la definizione del modello concettuale. Successivamente sono state implementate le condizioni iniziali e le condizioni al contorno. La calibrazione del modello è stata effettuata utilizzando il metodo manuale “trial and error adjustment”, cercando di minimizzare il più possibile il valore dei residui (differenza fra il valore misurato e quello calcolato dal modello). La fase di calibrazione, unitamente all’analisi di sensitività, hanno permesso anche di definire i parametri del modello più “sensibili”, ovvero quei parametri che influenzano maggiormente i risultati del modello. Questi sono risultati le geometrie e la conducibilità idraulica dei livelli acquiferi (calcareniti e conglomerati) e le zone di fratturazione/faglia. Il modello numerico realizzato ha confermato, nel complesso, il modello concettuale elaborato precedentemente mettendo anch’ esso in risalto, all’interno del bilancio idrico restituito dal modello, il processo dell’ingressione marina. Sono state però evidenziate anche quali sono le lacune da dover colmare per poter comprendere maggiormente nel dettaglio il sistema acquifero. Nello specifico è stato visto come la complicata geometria del sistema acquifero (es. le zone a maggior fratturazione) giochino un ruolo fondamentale nell’idrodinamica del sistema stesso e che una maggiore conoscenza di questi aspetti dovrebbe essere necessaria per avere un modello numerico maggiormente rappresentativo. A tal proposito sarebbero necessarie ulteriori indagini di sottosuolo, perforazioni di ulteriori sondaggi o metodi indiretti, per una migliore ricostruzione delle idrostrutture e delle zone di fratturazione, spostandosi anche verso mare per meglio comprendere anche i rapporti acqua dolce/acqua di mare.
The main objective of this thesis work is the creation of a numerical flow model of the Pianosa Island aquifer system, based on a solid conceptual hydrogeological model, defined using a multidisciplinary approach that took into consideration geological-stratigraphic, hydrogeological, geophysical, geochemical and meteoclimatic aspects. Specifically, particular importance was given to the construction of the 3D geological model of the aquifer system itself.
For the development of the conceptual model data were used from previous studies and campaigns and from the hydrogeological-geochemical campaign in which I participated in October 2022. For the determination of the hydro-structural structure and the creation of the 3D solid geological model were used and processed data from the stratigraphies of the deep wells and a piezometer, layer measurements taken from the geological map, the stratigraphic column related to the Gulf of Botte Formation emerging along the west coast of the island and the data of the geophysical campaign carried out by the INGV of Rome in October 2015. Data on measurements of piezometric levels, physico-chemical parameters and previous geochemical data (period 2015-2022) were also processed, with the creation of piezometric charts, classification diagrams and correlation diagrams. In particular, from these elaborations, it would seem that the recharge of the surface aquifer occurs mainly by infiltration of local rainwater, while the recharge of deep aquifers would be largely linked to the hydraulic connection that exists between the calcarenites hosting the groundwater and the conglomerates hosting the confined aquifers. Moreover, geochemical data do not exclude a feeding of the latter by a deep regional circulation. The water balance was then calculated, in which the main entries in and out of the aquifer system were estimated (period 2015-2022). For the estimation of effective precipitation, temperature and precipitation data measured directly on the island were used, using the Thornthwaite method for the calculation of real and potential evapotranspiration. The effective infiltration was estimated considering zero the surface outflow. Further output is the volume of water taken out from the PN3 well, the only active well on the island, estimated on the basis of the periods of ignition of the well itself.
On the basis of the conceptual model developed, a numerical model in steady state flow of the aquifer system was built, using the MODFLOW calculation code and the Groundwater Vista graphical interface. Spatial domain discretization and conductivity zone assignment were created on the basis of the solid 3D model built during the conceptual model definition. After the initial conditions and boundary conditions were implemented. The calibration of the model was carried out using the manual method "trial and error adjustment" trying to minimize as much as possible the value of the residues (difference between the measured value and that calculated by the model). The calibration and sensitivity analysis also allowed to define the most "sensitive" model parameters, those parameters had the most influence on the model’s results. These were the geometries and hydraulic conductivity of aquifer levels (calcarenites and conglomerates) and fracture/fault zones. The numerical model produced has confirmed, on the whole, the conceptual model elaborated previously putting also it in prominence, inside of the returned water balance from the model, the process of the marine ingression. However, the gaps to be filled in order to better understand the aquifer system have also been highlighted. Specifically, it has been seen as the complicated geometry of the aquifer system, such as the fracture zones identified, play a fundamental role in the hydrodynamics of the system itself and that a greater knowledge of these aspects should be necessary to have a more representative numerical model. In this regard, further underground investigations, drilling of further surveys or indirect methods would be necessary for a better reconstruction of hydrostructures and fracture zones, also moving towards the sea to better understand the freshwater/ sea water ratios
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
- …
