1,720,952 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
PLA-bioplastist toote projekteerimine, arendus ning valmistamine 3D printeriga
No full textTöö eesmärgiks oli kasutades eelnevalt omandatud joonestamis- ja projekteerimisoskusi
raalprojekteerimises konstrueerida ja valmistada 3D-printeri abil keskkonnasäästlikust polümeerist
tarbeese. Keskkonnasäästlikuks polümeeriks valiti pikkade alifaatsete süsivesinikahelatega estrite
rühma kuuluvat materjali, mille nimetus on polüaktiid (PLA).
Tarbeplastid nagu polüetüleen (PE), polüpropüleen (PP), polüvinüülkloriid (PVC) ja polüstüreen
(PS) on tänapäeval laiemalt levinud kui bioplastide rühma kuuluvad plastid enda maksumuse ja hea
töödeldavuse tõttu, aga nende pikk lagunemisperiood, madalad mehaanilised näitajad peale
ümbertöötlemist ning vähesed utiliseerimisvõimalused on peamisteks põhjusteks mille tõttu on
lähitulevikus vajalik nende osatähtsust oluliselt vähendada ning investeerida bioplastidesse, mille
hulka kuulub ka PLA.
Mehaanilised katsed näitasid, et PLA kui materjal on rabe, aga tema mehaanilised omadused on
piisavad, et valmistada sellest argipäevaselt kasutatavaid tarbeesemeid, mis ei tööta löökkoormustele.
Jäiga ja vastupidava konstruktsiooni valmistamisel on tähtsamal kohal valmistatava eseme
materjaliga täiteprotsent ning prinditud materjali kiudude asetus jõu ja momendi rakendamissuuna
suhtes.
Detaili valmistamisel on soovituslik kasutada kallimaid printereid, millel on täpsem programm-
juhtimise süsteem. Lisaks parematele printeritele aitavad parema materjali struktuuri tagada
madalamad printimiskiirused ja ekstruuderi väiksema läbimõõduga printimispea.
Valmistatava tarbeese, milleks oli valitud joogitopsi- ja telefonihoidja, eesmärgiks oli tagada selle
modulaarsust, mille abil oleks võimalik kasutatava seadme lahti võtta ning viga saanud detaili uue
vastu välja vahetada. Valmistatud ja arendatud tooteprototüüp koosneb kolmest detailist mida
liidetakse omavahel kokku sangade abil ilma liimi kasutamata. Ühe detaili purunemisel on võimalik
vigastatud detaili koostust eemaldada ning uue detailiga välja vahetada, mis tagab pikema tarbeeseme
eluea ning oluliselt tõstab selle parandamisvõimalusi. Valmistoode ei vaja täiendavaid pakendeid ja
on peale puhastust kohe kasutamiseks valmis. Toodete saatmisel on aga võimalik kasutada
biolagunevaid pakendeid nagu kartong.With this thesis the author focuses on designing and manufacturing an object of utility made from
biodegradable polymer using knowledge in computer-aided design and 3D printing technology. The
material chosen to be used for production was polylactic acid, also known as polylactide (PLA).
Commodity plastics used in today’s manufacturing like polyethylene (PET), polypropylene (PP),
polyvinyl chloride (PVC) and polystyrene (PS) have a bigger market share than biodegradable
plastics due to the lesser cost of manufacturing and good processing properties, but their longer period
of degradation, low mechanical properties of recycled mass, and scarce options of recycling are the
main reasons why the industry should lower their market share and invest in more environment-
friendly biodegradable polymers like PLA.
Mechanical tests showed that PLA is a brittle material, but its mechanical properties satisfy the
requirements to manufacture the commodity items used in everyday life which are not affected by
impact loads. In order to manufacture a rigid and durable product, the infill and fiber orientation in
relation to the momentum and force should be taken into account.
In product manufacturing, the structure and quality of the final product is closely related to
computerized numerical control algorithms of a particular 3D printer. In addition to that, a slower
feed rate of material and a smaller nozzle of the extruding unit aid to achieve better results of 3D
printing.
The main goal of the design was to make the final product modular, which would improve its
repairability and service life – the product consists of three parts joined together by glue-free clamp-
based joints, allowing to swap damaged parts out. It is free of packaging and ready to be used after
the final refinement. Shipping and handling the product to an end-user is possible by using cardboard-
based packaging which is biodegradable and environmentaly friendly
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
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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