1,721,202 research outputs found
Anti-adhesion of thin polymer films as cells/biofilm repellent for biomedical devices
No full textSurface with abilities for anti-adhesion of living tissue is vital for biomedical applications such as in sensors and medical implants. Cellular (MG-63 osteo-blast cells) anti-adhesion properties of plasma de- posited thin polymer films using CH 4 gas as a precursor were investigated. Thinner coatings reduce the risk of swelling or delamination in wet environment considerably. X-ray photoelectron spectroscopy and contact angle measurements were used to provide molecular and surface energy information, respec- tively, to assist in forming properties-structure relationships. SEM was used to provide information re- garding surface topography and morphology. All plasma deposited surfaces showed an increase in con- tact angle measurements while SEM images showed a visible thin coating that masked the surface fea- tures, and chemistry, of PEEK. The osteoblast cells responded to all surface attributes. Chemistry wise, the percentage of living cells on the plasma treated PEEK substrates reduced with the reduction of relative oxygen concentration on the surface especially with C-O functional groups. Hence the relative concen- tration of C-functional groups could be used as a controlled variable to regulate anti adhesion properties for medical devices. Cells also showed a clear positive trend with the sp3/sp2 ratio. Positive trends were noticed between cells spreading and proliferation and C-O functional group and the increase of contact angle measurements
Automatic morphological analysis and interlinking of historical Irish cognate verb forms
Get PDFThe main aim of the author’s research project is to use computational approaches
to gain more insight into the historical development of Irish verbs. One of the objectives is to investigate how a link between the electronic Dictionary of the Irish
language (eDIL),1 covering the period c. 700–c. 1700, but focussing on Early Irish
(7th–12th centuries), and the nascent Foclóir Stairiúil na Gaeilge ‘The Historical
Dictionary of Irish’,
2 covering the period 1600–2000, could be implemented. Such
a link will be hugely beneficial for scholars operating at the intersection of the medieval and modern period (see Table 1), who currently lack a comprehensive lexical resource for the “intermediate” early modern period.This paper stems from research carried out during a
Government of Ireland Postgraduate Scholarship (GOIPG/2017/1808) funded by
the Irish Research Council. The author would also like to acknowledge the
anonymous reviewer for helpful feedback and the editors for seeing this publication through.Peer reviewe
Comments on the Chartres text, with a special attention on vowel-final forms
Get PDFDavid Stifter focusses his study on the loss of final -s-, a phenomenon which he has studied in previous studies. For the personal names with final -o in the second list, he suggests a dative singular (as in Latin) or an accusative singular, those with final -i being dative or accusative singular feminine. Forms in -us might be gamonyms, as in the Larzac tablet. Duti so adogarie is analysed as a verbal complex with infixation of a connecting particle (e)ti, and of a pronoun so, between the first preverb (du) and the other preverbs (ad-(u)o-), followed by a conjugated form with a reduced ending (= conjunct).David Stifter analyse plus particulièrement la chute de -s-, car il a déjà étudié ce phénomène de façon approfondie pour la langue gauloise. Pour les noms personnels en -o de la seconde liste, il suggère l’analyse comme datif singulier (comme en latin), les noms en -i étant des datifs ou accusatifs singuliers féminins. Les formes en -us pourraient être des gamonymes, comme dans le Plomb du Larzac. Duti so adogarie
est lu comme une formule verbale avec infixation d’un connecteur (e)ti, et d’un pronom so, entre le premier préverbe (du) et les autres préverbes (ad-(u)o-) suivis d’une forme verbale avec désinence réduite (= conjointe).Stifter David. Comments on the Chartres text, with a special attention on vowel-final forms. In: Etudes Celtiques, vol. 39, 2013. pp. 169-180
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
Strategies in tracing linguistic variation in a corpus of Old Irish texts (CorPH)
Get PDFThis article introduces Corpus PalaeoHibernicum (CorPH), a corpus currently consisting of 78 texts in Early Irish (c. 7th–10th cent.) created by the ERC-funded Chronologicon Hibernicum (ChronHib) project by bringing together pre-existing lexical and syntactic databases and adding further crucial texts from the period. In addition to being annotated for POS, morphological and syntactic information, another layer of annotation has been developed for CorPH – ‘Variation Tagging’, i.e. a tagset that numerically encodes synchronic language variation during the Early Irish period, thus allowing for much improved research on the chronological variation among the material. Another new pillar of studying linguistic variation is Bayesian Language Variation Analysis (BLaVA), in order to address the challenge that “not-so-big data” poses to statistical corpus methods. Instead of reflecting feature frequencies, BLaVA models language variation as probabilities of variation
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
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