1,721,322 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
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
Determination of waves in three dimensions
No full textMulti-directional waves are generated and analyzed theoretically based on the three dimensional wave spectra.The generation of waves covers both wave fields containing only incident waves and waves with both incident and reflected waves. These waves are then analyzed based on a piecewise constant method and later by the Maximum Likelihood Method.To verify the results commercial software is used and compared with the results obtained from the implemented methods.Additionally wave series obtained from IAHR are analyzed to determine the reliability of the implemented analyzing methods.The wave gauge array used in this project is the CERC 5 gauge array. To determine the resolution of the directional wave spectra obtained by the CERC array it is compared to alternative wave gauge arrays
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
Assessment of disinfecting contaminated water bottles for reuse within potable water requirements in Tanzania.
No full textTanzania er et udviklingsland, hvori fattigdom og konsekvenserne af klima forandringer præger størstedelen af befolkning, hvilket resulterer i store risikoer for vandbårne sygdomme og dertilhørende dødsfald som følge af utilgængeligheden af rent vand. Både nationale og internationale intiativer har fokuseret på at øge tilgængeligheden af rent vand, hvilket angiver en risiko i forurende beholdere, som benyttes til at transportere vandet i. Dette studie har undersøgt muligheden for at lave en renseenhed, der kan rense en flaske, således at det genopfyldte vand i flasken kan overhold krave for sikkert drikkevand, angivet i Tanzanias standarder. ECA vand er et disinfektionsmiddel baseret på natriumklorid, som bruger oxidations potentiale til at deaktivere bakterier, hvor efterskylning af flaske er unødvendigt. Ved at justere på parametrene rensetid, koncentration of vandtryk, benyttes kimtal til at vurdere hvorvidt kravene for drikkevand kan opnåes. Sideløbende er dysen til rengøring blevet modificeret. Ved en koncentration på 30 ppm og en rensetid på 5 sekunder ved et vandttryk på 2,6 bar er det muligt for kimtal at overholde kravene til drikkevand. Hertil vil kimtallet reduceres med up til 99% sammenlignet med vandkvaliteten i en flaske, der ikke var rengjort. Der er testet for Coliforms og E. coli, hvor et komplet fravær var fundet, hvilket opfylder kravene til drikkevand. Ubetydelige mængder af ATP var fundet på overflade arealer af dysen, gevindet i proppen og på flaske hovedet, hvilket indikere begrænsede smitterisiko imellem brugere.Tanzania is a developing country, where the majority of the population are suffering from poverty and experiencing the severe consequences of climate change, resulting in great risks of waterborne diseases and related deaths due to inaccessibility to clean water. Both national and international initiatives have focused on increasing access to clean water, however contaminated bottles and containers for transporting the water remain a risk. This thesis has investigated the possibility of a cleaning unit that allows for the criteria of potable water, following the standards in Tanzania, to be withheld for water refilled in a cleaned bottle. The unit disinfects the bottles using ECA water, a sodium chloride based solution that inactivates the bacteria by oxidation, and does not require a rinse of the bottle after use. Cleaning time, concentration and water pressure were adjusted until a steady results of viable counts within the criteria for potable water could be met, where as little water as possible was wasted for cleaning. Alongside, the nozzle underwent physical modifications. It was found that a concentration of 30 ppm for 5 seconds of cleaning time with a water pressure of 2,6 bar will allow for the criteria to be met, and decrease the amount of viable counts of up to 99% from initial state of water in an uncleaned bottle. Furthermore an absence of Coliforms and E. coli is found, and insignificant levels of ATP is found on cap and mouth piece of bottle, and surface area of cleaning unit, indicating limited risks of transmitting diseases between users
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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