1,720,961 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
Particulate matter dispersion in an urban-industrial environment and deposition on Quercus ilex leaves: laboratory and modelling analysis
No full textA number of studies have focused on urban trees to understand their mitigation capacity of air pollution. Present PhD project aims to describe Particulate Matter (PM) accumulation on tree leaves in a specific urban environment as case study, both in terms of quantity and quality. Furthermore, experimental data obtained from laboratory analysis are crossed with an air pollution model designed for urban environments, in order to relate PM deposition to main polluting sources.
PM deposition on Quercus ilex leaves was quantitatively analyzed in four districts of the City of Terni (Italy) for three periods of the year. Fine (between 0.2 and 2.5 µm) and Large (between 2.5 and 10 µm) PM fractions were analyzed. Mean PM deposition value on Quercus ilex leaves was 20.6 µg cm-2. Variations in PM deposition correlated with distance to main roads and downwind position relatively to industrial area. Epicuticular waxes were measured and related to accumulated PM. For Fine PM deposited in waxes we observed a higher value (40% of total Fine PM) than Large PM (4% of total Large PM).
Model chosen to perform the air quality simulation on the study area was the TAPM (The Air Pollution Model) and ran for 1 year period on study area (Jan 2012 – 2013). This model allowed describing PM dispersion pattern within the city, according to the main polluting sources position. TAMP implementation evidenced areas potentially more polluted in the case study city and the local effect of air pollution sources.
Qualitative analysis is obtained through the application of a monitoring and characterization protocol for PM deposited on Q.ilex leaves. Four trees were selected as representative of urban environments based on their proximity to a steel factory and a street. PM from quantitative analysis was characterized using scanning electron microscopy and energy dispersive X-ray spectroscopy, inferring the associations between particle sizes, chemical composition, and sampling location. Modeling of particle size distributions showed a tri-modal fingerprint, with the three modes centered at 0.6 (factory related), 1.2 (urban background), and 2.6 μm (traffic related). Chemical detection identified 23 elements abundant in the PM samples. Principal component analysis recognized iron and copper as source-specific PM markers, attributed mainly to industrial and heavy traffic pollution respectively.
A similar technique implemented for qualitative analysis is being used in the “European Sampling Campaign” a huge PM characterization project, in collaboration with Antwerp University within COST FP1204. Platanus sp. leaves were collected in 20 different cities and analyzed. SEM/EDX was supported by SIRM (Saturation Isothermal Remnant Magnetization) analysis. First results are reached, nevertheless the work is still in progress: the largest part of analyzed particles is fine PM; not direct association between site and PM dimension or density on leaves is found. PM quality is different between upper or lower leaf side. Iron is confirmed as “technology” marker. There is a relation between Fe concentration and SIRM results.
Results from this study allow to increase our understanding about air pollution interactions with urban vegetation and could be hopefully taken into account when guidelines for local urban green management are realized. Upscale of qualitative results on leaf area basis provided a useful indicator for strategic evaluation of harmful PM pollutants using tree leaves.Numerosi studi sono stati svolti sul ruolo degli alberi in ambiente urbano nella mitigazione dell’inquinamento atmosferico. Il progetto qui presentato ha come obiettivo di descrivere l’accumulo del Particolato Sottile (PM) in uno specifico ambiente urbano, sia da un punto di vista quantitativo che qualitativo. I dati di laboratorio sono stati confrontati con gli output di un modello progettato per ambienti urbani, al fine di collegare la deposizione del PM alle principali sorgenti di inquinanti.
La quantità di PM depositata su foglie di Quercus ilex (leccio) è stata analizzata in quattro quartieri della città di Terni (Italia), per tre periodi dell’anno. È stato analizzato sia il PM fine (0.2 e 2.5µm) che il grossolano (2.5 e 10µm). Il valore medio di deposizione sulle foglie è 20.6 µg cm-2. La variabilità di deposizione è legata a 2 fattori: distanza dalla strada e posizione sottovento relativamente all’area industriale. Le cere cuticolari sono state quantificate. Per il PM fine è stato osservato un valore maggiore di accumulo nelle cere (40% del fine totale) rispetto al grossolano (4% del grossolano totale).
Il modello utilizzato nell’area di studio è il TAPM (The Air Pollution Model; Australia). È stato applicato su un anno (Gen’12 – Gen’13). L’analisi ha permesso di descrivere la modalità di diffusione del PM nell’area di studio, in base alla posizione delle principali sorgenti inquinanti. L’applicazione di TAPM ha evidenziato le aree potenzialmente più inquinate e l’effetto delle sorgenti locali.
Per l’analisi qualitativa sono stati selezionati quattro alberi, come rappresentativi di differenti ambienti urbani. La scelta è basata su: distanza dalla strada, vicinanza all’acciaieria. Il PM raccolto tramite analisi quantitativa è stato analizzato attraverso microscopia elettronica a scansione e spettroscopia a raggi-X. La relazione tra dimensione del PM, composizione chimica e localizzazione dell’albero è stata evidenziata. La distribuzione delle dimensioni delle particelle è descritta tramite una struttura tri-modale: 0,6 (acciaieria), 1,2 (fondo urbano) e 2,6 (strada). Sono stati individuati 23 elementi come componenti del PM. L’analisi delle componenti principali (PCA) ha identificato il ferro e il rame quali traccianti di sorgenti specifiche: area industriale e traffico.
Una simile analisi qualitativa è ancora in uso nella “Campagna Europea di Campionamento”, ampio progetto di caratterizzazione del PM depositato su foglie di Platanus sp., in collaborazione con l’Università di Anversa. I campioni sono stati raccolti in 20 città. L’analisi SEM/EDX è supportata da quella SIRM (Saturazione Isotermica Magnetizzazione Rimanente). Il lavoro è ancora in corso, i primi risultati vengono presentati. C’è una generale omogeneità di PM all’interno di ogni città, e si può apprezzare una variazione dimensionale e di densità di particelle solo tra pagina inferiore e superiore della foglia. Il ferro è un probabile tracciante del traffico. È stata trovata una buona relazione tra % di ferro e dati SIRM.
I risultati di tale studio hanno permesso di approfondire la comprensione riguardo le interazioni tra vegetazione urbana e inquinanti atmosferici. È auspicabile che venga preso in considerazione per la realizzazione di linee guida per la gestione del verde urbano. L’upscale dei risultati qualitativi fornisce degli utili indicatori per eventuali progetti di mitigazione del PM tramite foresta urbana.Dottorato di ricerca in Management and conservation issues in changing landscapes (XXVII ciclo
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
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