1,720,961 research outputs found
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
Characterizing the convective boundary layer with wind-profiling and scanning Doppler lidar
No full textKonveksjon har stor innvirkning på strukturen og utviklingen av det atmosfæriske grenselaget. Det er imidlertid utfordrende å måle de karakteristiske lengde- og tidsskalaene ved hjelp av konvensjonelle meteorologiske metoder. Derfor er konveksjon fortsatt ikke godt nok observert. Denne avhandlingen og de tre artiklene som inngår i den, presenterer to metoder for å observere det konvektive strømningsfeltet ved hjelp av forskjellige lidar-baserte målemetoder, både over hav og flatt og komplekst terreng over land. Disse målingene av strømningsfeltet kan brukes til å trekke ut grunnleggende konvektive egenskaper, som for eksempel karakteristiske høyde- og lengdeskalaer, samt vertikale hastigheter. Å kombinere dette med supplerende meteorologiske målinger muliggjør undersøkelsen av samspillet mellom disse egenskapene og andre prosesser i det konvektive grenselaget.
I artikkel I identifiserer vi de oppløselige skalaene til turbulente og organiserte virvler i det marine konvektive grenselaget fra vindprofiler tatt med lidar på et skip i bevegelse. Artikkel I evaluerer påvirkningen av skipsbevegelsen og bevegelseskorreksjon på lidarobservasjonenes statistikk og spekter. I tillegg inkluderer avhandlingen en evaluering av bevegelseskorreksjonsalgoritmen på et datasett innhentet under et kontrollert eksperiment med bevegelse. Resultatene fra artikkel I viser
at dersom bakgrunnshastigheten er tilstrekkelig kan de konvektive skalaene bli oppløst med en profilerende lidar.
Tilsvarende konvektive strukturer under et kaldluftsutbrudd er analysert i artikkel II. Studien anvender spektral koherens- og faseanalyse på det konvektive strømningsfeltet fra lidarobservasjoner for å studere karakteristikkene til koherente strukturer i organisert konveksjon. Utviklingen av strukturstørrelser og hastighet på korte tidsskalaer er følsomme for overflatelagets lagdeling og vindskjær. De største strukturene blir observert under forhold der oppdriftsproduksjonen marginalt overgår skjærsproduksjonen av turbulens. Over lange tidsskalaer bidrar disse storskala strukturene til omvelting og at det marine konvektive grenselaget blir dypere.
Artikkel III utforsker muligheten til å bruke to landbaserte lidar systemer i dual-scanning oppsett for å måle konveksjon. Studien introduserer en avansert filtrering og en interpolasjonsmetode i tid som forbedrer lidardataene vesentlig for å måle konveksjon. Observasjonene viser at formen og utviklingen til de konvektive strukturene, samt samspillet mellom disse strukturene og andre prosesser i det atmosfæriske grenselaget, hovedsakelig blir påvirket av variasjoner i lokasjon, f.eks. flatt kontra komplekst terreng, eller innlandet kontra kysten.
Avhandlingen følger opp funnene i artikkel III, og presenterer de første resultatene av det konvektive strømningsfeltet funnet ved hjelp av en euleriansk tilnærming ved bruk av dual-scanning lidar og en lagransk tilnærming som tar i bruk glidere for å måle nøkkelparametrer fra konveksjon, slik som hastighet, temperatur og fuktighet. For det presenterte tilfellet utfyller den eulerianske og lagranske tilnærmingen hverandre og gir detaljert informasjon om henholdsvis de nedre og øvre delene av de konvektive strukturene.Convection strongly impacts the structure and evolution of the atmospheric boundary layer. Yet, the characteristic temporal and spatial scales of the convective circulation are challenging to capture with the conventional meteorological measurement setup and instrumentation. As a consequence, atmospheric convection is still under-sampled. This dissertation and the three included papers
introduce two approaches for observing the convective flow field and its evolution, using profiling and dual-scanning lidar techniques above the ocean, and over complex and flat terrain on land. These flow field observations are utilized to extract fundamental convection characteristics, as for example, the horizontal and vertical dimensions, and velocities of the convective updraft and downdraft. In combination with complementing meteorological measurements, this allows the investigation of the interaction of those characteristics with other processes in the convective boundary layer (CBL).
The focus of Paper I is on identifying the resolvable range of turbulent and organized eddies in the marine CBL by ship-based profiling lidar observations, that are exposed to ship motion. Paper I evaluates the impact of the ship motion and the applied motion correction on the statistics and spectra of the lidar observations. In addition to this evaluation, the dissertation includes an assessment of the utilized motion correction algorithm applied to data that are acquired during a controlled-motion experiment. The results of Paper I indicate, that convective scales can be resolved with the evaluated profiling lidar setup, given a sufficient horizontal background flow velocity.
Corresponding convective structures, under prevailing cold air outbreak conditions, are analysed in Paper II. The study applies spectral coherence and phase analysis to the lidar-observed flow field, extracting characteristics of organized convection, namely coherent structures. The short-term evolution of the structure sizes and velocity amplitudes is sensitive to the surface layer stratification and wind shear. The largest structures are observed for conditions, where the buoyancy production marginally dominates the shear production of turbulence. On the long-term, these large scale structures strongly contribute to the overturning and deepening of the marine CBL.
Complementary to the ship-based, profiling lidar approach over the ocean, Paper III explores the capability of land-based, dual-scanning lidars to sample convection. The study introduces an advanced filtering and a temporal interpolation approach, that substantially enhance the lidar data for convection sampling. Here, the shape and evolution, and interaction of the observed convective structures with other boundary-layer processes were mainly impacted by the differences in the evaluated measurement locations, i.e. flat versus complex terrain, and inland versus close vicinity to the sea.
The dissertation follows up on the findings of Paper III, presenting first results of the convective flow field retrieval achieved with the Eulerian, dual-scanning lidar approach collocated with a Lagrangian approach using gliders to sample key parameters from inside the convective updraft, i.e. velocity, temperature and humidity. For the presented case, the Eulerian and Lagrangian approaches complement each other, yielding detailed information about the lower and upper part of the convective structure, respectively.Doktorgradsavhandlin
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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