1,720,953 research outputs found
Impact of Permeability Variations and Well Placement on CO₂ Storage Efficiency in Saline Aquifers Utilizing 3D Visualization Techniques
Full text linkForskningsspørsmålet i denne studien fokuserte på hvordan CO2 kan lagres mer effektivt
under jorden og hvilke parametere som påvirker lagringseffektiviteten i salinakviferer.
Spesielt ble effekten av permeabilitet og plassering av brønner/injektorer på
CO2-lagringseffektiviteten undersøkt. Målet var å fastslå hvordan varierende permeabilitetsnivåer
bidrar til lagringseffektiviteten og om plasseringen av injeksjonsbrønner
påvirker denne effektiviteten. Selv om andre faktorer som påvirker lagringseffektiviteten
ble anerkjent, fokuserte denne studien utelukkende på effektene av permeabilitet og brønnplassering.
Metodikken involverte å modifisere en eksisterende reservoarmodell for å reflektere
endringer i permeabilitet og brønnplasseringer. Disse modifikasjonene ble visualisert ved
hjelp av Eclipse 300, noe som tillot observasjon av CO2-plumen og gassmetningen under
forskjellige scenarier. Ulike parametere ble målt ved bruk av ResInsight, og resultatene
ble tolket ved å erstatte målte parametere i lagringseffektivitetsformelen.
Undersøkelsen av effektene av permeabilitetsendringer og brønnplassering på CO2-
lagringseffektiviteten ga viktige innsikter. Det ble funnet at en liten reduksjon av svært
lave permeabiliteter reduserer lagringseffektiviteten ved lavere injeksjonshastigheter, mens
ved høyere hastigheter forblir effektiviteten stort sett uendret. Å homogenisere reservoarpermeabiliteten
ga varierte resultater: ved lavere hastigheter reduserte det lagringseffektiviteten
ved å eliminere potensielle CO2-feller, men ved høyere hastigheter forbedret
det effektiviteten ved å legge til rette for en jevn CO2-strøm. En 10% reduksjon i permeabilitet
senket konsekvent effektiviteten, spesielt ved økte injeksjonshastigheter. I tillegg
ble det funnet at brønnplassering betydelig påvirket lagringseffektiviteten, med nedadskråning
av brønnplasseringer som forbedret lagringen sammenlignet med oppadskråning,
sannsynligvis på grunn av forbedret CO2-migrasjon og akkumuleringsdynamikk. Disse
funnene understreker viktigheten av å optimalisere reservoarpermeabilitet og strategisk
brønnplassering for å maksimere CO2-lagringseffektiviteten tilpasset spesifikke injeksjonshastigheter.The research question addressed in this study focused on how CO2 can be stored more efficiently
underground and the parameters that affect its storage efficiency in saline aquifers.
Specifically, the effects of permeability and well/injector placement on CO2 storage efficiency
were examined. The objective was to determine how varying permeability levels
contribute to storage efficiency and whether the placement of injection wells impacts
this efficiency. While other factors influencing storage efficiency were acknowledged, this
study concentrated solely on the effects of permeability and well placement.
The methodology involved modifying an existing reservoir model to reflect changes
in permeability and well locations. These modifications were visualized using Eclipse
300, allowing for observing the CO2 plume and gas saturation under different scenarios.
Various parameters were measured using ResInsight, and the results were interpreted by
substituting measured parameters in the storage efficiency formula.
Investigating the effects of permeability changes and well placement on CO2 storage
efficiency yielded critical insights. It was found that reducing very low permeabilities
slightly decreases storage efficiency at lower injection rates, while at higher rates, the efficiency
remains largely unchanged. Homogenizing reservoir permeability produced varied
outcomes: at lower rates, it decreased storage efficiency by eliminating potential CO2
traps, but at higher rates, it improved efficiency by facilitating consistent CO2 flow.
A 10% reduction in permeability consistently lowered efficiency, especially at increased
injection rates. Additionally, well placement was found to significantly impact storage
efficiency, with downdip well placements enhancing storage compared to up-dip positions,
likely due to improved CO2 migration and accumulation dynamics. These findings underscore
the importance of optimizing reservoir permeability and strategic well placement
to maximize CO2 storage efficiency tailored to specific injection rates.
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
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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