1,720,960 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
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
Eksperimentalna analiza kavitacijske erozije v toku kapljevine s trdimi delci
Get PDFCavitation erosion is a problem that presents a challenge for the engineers in different industries, as it erodes the machinery which leads to lower efficiency and higher maintanance costs. An experimental investigation has been conducted to evaluate cavitation and cavitation erosion with and without the presence of solid particles in a Venturi channel. The methodology is based on observing and analysing the evolution of the vapour structures and occurence of cavitation erosion on the sample surface in the Venturi channel. To conduct experiments the cavitation tunnel was used, with the central component being a transparent test section with a Venturi-like channel (constructed from Plexiglass walls and a metal insert) to monitor the process of cavitation. To detect the damage caused by cavitation erosion and abrasion, the most effective solution was found to be an indicator in the form of black acrylic paint thinned with water (at a ratio of 1:2). On the sample surface, a self-adhesive aluminium tape was applied to protect the aluminium base from erosive characteristics from cavitation Furthermore, a comparison between cavitation with and without solid particles was made to determine the effects of solid particles on both cavitation and abrasion of the sample surface. The observation revealed that no matter the solid particles, damage from cavitation erosion appears at the separation point and in proximity to the location of the detached cloud collapse. The spherical glass particles with diameters between 40 µm and 70 µm added an abrasive effect on the sample surface only in the presence of cavitation structures. It was determined, that the intensity of cavitation erosion and abrasion increases when the cavitation number decreases and volumetric flow rate increases. Also, an economic analysis was conducted, to determine which is the more cost beneficial solution between replacement of the metal insert and application of protective coatings over the metal insert.Kavitacijska erozija je izziv za inženirje v različnih industrijah, saj povzroča erozijo strojev, kar vodi do manjše učinkovitosti in višjih stroškov vzdrževanja. Izvedena je bila eksperimentalna analiza kavitacijske erozije v toku kapljevine s trdnimi delci v Venturijevem kanalu in brez njih. Metodologija temelji na analizi in opazovanju razvoja parnih struktur in kavitacijske erozije na površini vzorca v Venturijevem kanalu. Za izvedbo eksperimentov je bil uporabljen kavitacijski tunel, katerega osrednji del je bil prozoren testni odsek z Venturijevim kanalom (izdelanim iz sten iz pleksi stekla in kovinskega vstavka) za spremljanje procesa kavitacije. Za spremljanje poškodb, ki jih povzročata kavitacijska erozija in abrazija, se je kot najučinkovitejša rešitev izkazal pokazatelj v obliki črne akrilne barve, razredčene z vodo (v razmerju 1 : 2). Na površini vzorca je bil nameščen samolepilni aluminijasti trak za zaščito aluminijaste podlage pred erozijskimi lastnostmi zaradi kavitacije. Poleg tega je bila izvedena primerjava med kavitacijo s trdnimi delci in brez njih, da bi ugotovili učinke trdnih delcev na kavitacijo in
površino vstavka. Opazovanja so pokazala, da se ne glede na trdne delce, poškodbe zaradi kavitacijske erozije pojavijo na mestu separacije kavitacijskega oblaka in in v bližini kolpasa kavitacijskega oblaka. Krogelni, stekleni delci premera od 40 µm do 70 µm so zgolj ob prisotnosti kavitacijskih struktur dodali abrazivni učinek na površino vstavka. Opazili smo, da se intenzivnost kavitacijske erozije in abrazije poveča, ko se kavitacijsko število zmanjša, volumski pretok pa poveča. Opravljena je bila tudi ekonomska analiza, da bi ugotovili, katera rešitev je stroškovno ugodnejša med zamenjavo kovinskega vstavka in nanosom zaščitnih premazov na kovinski vstavek
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Analysis of Alternative Routing Methods in MPLS Networks
Get PDFU ovome radu analizirane su dvije metode alternativnog usmjeravanja u MPLS (MultiProtocol Label Switching) mreži, a to su hop-by-hop (usmjeravanje iz izvora uz prenošenje) i eksplicitno (usmjeravanje s upravljanjem iz izvorišnog čvora). Proizvoljno je definirana topologija mreže koja sadrži 17 čvorova, kao i vjerojatnosti dostupnosti grana između tih čvorova. Temeljem definiranih parametara određene su vjerojatnost blokiranja zahtjeva između svakog para izvorišnog-odredišnog čvora (NNGoS - Node-to-Node Grade of Service) za pojedinu metodu usmjeravanja paketa u MPLS mreži.In this thesis two methods of alternative routing in MPLS (MultiProtocol Label Switching) network are analyzed. These are: hop-by-hop routing and explicit routing. The network topology, which consisted of 17 network nodes, and link availability probability were defined arbitrary. Based on these parameters blocking probability values were defined for each pair of source-destination node (NNGoS - Node-to-Node Grade of Service) and for each of the two routing methods in the MPLS network
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