1,720,968 research outputs found
Design and development of polymer optical fiber based platforms for glucose detection.
Get PDF127 p.Tesi-lan honetan polimerozko zuntz optikoetan oinarritzen diren glukosa detekzioa egiteko bi plataformaaurkezten dira. Lehenik eta behin, tesiaren testuingurua deskribatzen da, horretarako biosentsoreen zeinpolimerozko zuntz optikoen oinarriak, garapen historikoa eta mugarri garrantzitsuenak azalduz. Ondoren,tesian zehar jorratzen diren detekzio tekniken azalpen teoriko bat egiten da, uhin ebaneszentea eta Ramanespektroskopia zer diren azalduz.Horren ostean, lehen detekzio plataforma azaltzen da, U formako nukleo hutsezko polimerozko zuntzoptikozko zunda bat erabiliz. Zunda honen gainazala fenilboroniko taldeekin funtzionalizatu eta AlizarinRed S izeneko koloratzailearekin kargatzen da. Honenbestez, zundaren ingurunean glukosa badago,glukosak koloratzailea desplazatu eta uhin ebaneszentearen xurgapenean aldaketak emango dira,glukosaren detekzioa gauzatuz. Honela, glukosa 0.1 mol/l-ko kontzentrazioan eta hainbat inguruneezberdinetan detektatu da.Hurrengo kapituluan, bigarren detekzio plataforma azaltzen da, zuntz bidez anplifikaturiko Ramanespektroskopian oinarritua. Kasu honetan, likidoz beteriko nukleodun polimerozko zuntz optikomikroegituratuak diseinatu, fabrikatu eta hiru zuntzen arteko konparaketa egiten da. Kasurik onenean, 5mmol/l-ko kontzentrazioan aurkitzen glukosaren zenbaketa limitea lortzen da ingurune urtsuan,erresoluzio nahikoa izanik SGLT2 inhibitore terapiaren jarraipena egiteko maila klinikoan.Azkenik, bi detekzio sistemak aplikazio errealetan erabiltzeko zein hobekuntza egin behar diren azaltzenda, esparru horietako lehen emaitza batzuk azalduz
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
Polimero akrilikoak oftalmologian. Degradazio-prozesuaren analisia
Get PDFThe use of polymeric contact lenses has risen worldwide the last years. During the development of these lenses, acrylic based materials have aroused as the most used polymers due to their optical properties. Taking into account the importance of these polymers, in this work we have explained the history and evolution of the contact lenses together with the properties that optical materials must have. Moreover, three commonly used polymers have been chosen, poly(methylmethacrylate), po ly(ben zylacrylate) and poly(tert-butylacrylate), and their thermal degradation and their kinetic have been studied.; Ukipen-leiar polimerikoen erabilpena zabaltzen ari da munduko gizarte orotan. Gaur egungo lenteetara iristeko eman diren aurrerapauso guztiek oinarri akrilikodun materialen erabilpena izan dute amankomunean, ezaugarri optiko paregabeak dituztelako. Hori dela eta, lan honetan material horien historia, ukipen-leiarren bilakaera eta polimerozko material optikoek bete beharreko baldintzak azaltzen dira. Horrez gain, industria honetan erabiliak izan diren poli(metilmetakrilato)aren, poli(bentzilakrilato)aren eta poli(tert-butilakrilato)aren degradazio termikoak eta beren zinetika aztertu dira
Poli(metilmetakrilatoa)ren gainazalaren eraldaketa: sentsore adimendunak
Get PDFParametro biologikoak neurtzeko sentsore-plataforma adimendunak sortzea gainazalak eraldatzearen arrazoi nagusienetako bat da. Kontzentrazio baxuko disoluzioak neurtzeko, hautakortasun handia behar denerako edo sentikortasun itzela nahi den egoeretan neurketak egin ahal izateko, sentsore hauen garapena beharrezkoa da. Horrez gain, osasungintzan erabili ahal izateko, biobateragarritasuna ezinbesteko ezaugarria denez, polimerozko sentsoreen erabilpena hazi egingo dela aurresan daiteke. Esparru honetan, oso erabilia den poli(metilmetakrilatoa)ren historia, gaur egun gainazalaren modifikazioak egiteko teknika erabilienak eta horiek eragindako modifikazioa karakterizatzeko moduak azaltzen dira lan honetan. Gainera, poli(metilmetakrilatoa)n eginiko zenbait modifikazio eta emaitza erakusten dira eraldaketen parametroak optimizatu nahian.; The need of measuring biological indicators is arousing new challenges for the polymer surface modification. Sensors capable of detecting substances in low concentration, when high selectivity is the key feature or when high sensitivity is needed, are the perfect solution. For using them in medical applications, the biocompatibility is a must-have feature and is then when smart polymer sensing platforms have their success. In this framework, the history of one of the most used polymer poly(methylmethacrylate), most common surface modification techniques and characterization terization methods are explained together with some surface modification experiments in poly(methylmethacrylate) samples and its results for the optimization of the parameters
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
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