1,720,984 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
COUPLAGE DE CIRCUITS DE BOÎTES QUANTIQUES A DES CAVITES MICROONDES
No full textTHE PROJECT OF THIS THESIS WAS TO EXPERIMENTALLY REALIZE THE IMPLEMENTATION OF QUANTUM DOT CIRCUITS (QD) IN A CIRCUIT CAVITY QUANTUM ELECTRODYNAMICS (CQED) ARCHITECTURE. THE INTEREST OF SUCH HYBRID SYSTEMS LIES IN THE LIGHT-MATTER INTERACTION THAT OCCURS BETWEEN THE CAVITY MICROWAVE PHOTONS AND THE ELECTRONS OF THE QD. IN THIS THESIS WORK, CARBON NANOTUBES HAVE BEEN CHOSEN AS THE MATERIAL FOR THE QDS. INDEED, IT IS POSSIBLE TO OBSERVE VARIOUS ELECTRONIC TRANSPORT REGIMES IN SUCH SYSTEMS (FABRY-PEROT, COULOMB BLOCKADE AND KONDO). THEIR VERSATILITY IS ALSO A KEYPOINT AS IT IS POSSIBLE TO CONTACT THEM WITH VARIOUS TYPE OF METAL ELECTRODES (NORMAL, SUPERCONDUCTOR, FERROMAGNETIC METAL). THE EXPERIMENTAL REALIZATION OF SUCH DEVICES HAS SHOWN AN ELECTRON-PHOTON COUPLING OF THE ORDER OF 100MHZ, COMPARABLE TO STANDARD CQED COUPLINGS. THIS COUPLING IS TUNABLE BY PURELY ELECTRIC CONTROL. FINALLY, WEHAVE DEMONSTRATED THE DISTANT INTERACTION BETWEEN TWO QDS, SEPARATED BY 80µM, VIA THE MICROWAVE CAVITY PHOTONS. THESE RESULTS SHOWS THAT THESE DEVICES CAN BE USED FOR MANIPULATING THE QUANTUM INFORMATION AS WELL AS FOR SIMULATE ON-CHIP CONDENSED MATTER SITUATIONS. WE HAVE THEREFORE BEEN ABLE TO MEASURE THE QUANTUM CAPACITANCE OF THE QDS, AND IN PARTICULAR IN THE KONDO REGIME. WE HAVE ALSO SIMULATED THE ELECTRON-PHONON POLARONIC SHIFT IN THE CASE OF THE DISTANT INTERACTION BETWEEN THE TWO QDS.CETTE THESE A EU POUR OBJET DE REALISER EXPERIMENTALEMENT L'INTEGRATION DE CIRCUITS DE BOITE QUANTIQUE (QD) DANS UNE ARCHITECTURE D'ELECTRODYNAMIQUE QUANTIQUE EN CAVITE SUR CIRCUIT (CQED). L'INTERET DE CES SYSTEMES HYBRIDES RESIDE DANS L'INTERACTION LUMIERE-MATIERE QUI S'OPERE ENTRE LES PHOTONS DE LA CAVITE MICROONDE ET LES ELECTRONS DU QD. DANS CE TRAVAIL DE THESE, IL A ETE CHOISI D'UTILISER DES NANOTUBES DE CARBONE COMME MATERIAU POUR LES QDS. EN EFFET, ILS PERMETTENT L'OBSERVATION DE DIFFERENTS REGIMES DE TRANSPORT ELECTRONIQUE (FABRY-PEROT, BLOCAGE DE COULOMB ET KONDO) ET ILS SONT EGALEMENT POLYVALENTS VIS-A-VIS DES MATERIAUX AVEC LESQUELS IL EST POSSIBLE DE LES CONTACTER (METAL NORMAL, SUPRACONDUCTEUR, FERROMAGNETIQUE). LA REALISATION EXPERIMENTALE DE CES DISPOSITIFS A PERMIS DE MESURER UN COUPLAGE ELECTRON-PHOTON DE L'ORDRE DE 100MHZ, COMPARABLE AUX COUPLAGES OBTENUS EN CQED TRADITIONNELLE. CE COUPLAGE EST REGLABLE PAR DES MOYEN PUREMENT ELECTRIQUES. ENFIN, NOUS AVONS MIS EN EVIDENCE L'INTERACTION A DISTANCE ENTRE DEUX QDS SEPARES DE 80µM, PAR L'INTERMEDIAIRE DES PHOTONS MICROONDES. CES RESULTATS DEMONTRENT LE POTENTIEL DE CES DISPOSITIFS POUR DES APPLICATIONS A LA MANIPULATION DE L'INFORMATION QUANTIQUE AINSI QUE LA SIMULATION SUR PUCE DE PROBLEMES DE MATIERE CONDENSEE. NOUS AVONS PU AINSI MESURER LA CAPACITE QUANTIQUE DES QDS, NOTAMMENT DANS LE REGIME KONDO, ET SIMULER LE DECALAGE POLARONIQUE ELECTRON-PHONON, DANS LE CAS DE L'INTERACTION A DISTANCE ENTRE LES DEUX QDS
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
COUPLAGE DE CIRCUITS DE BOÎTES QUANTIQUES A DES CAVITES MICROONDES
No full textTHE PROJECT OF THIS THESIS WAS TO EXPERIMENTALLY REALIZE THE IMPLEMENTATION OF QUANTUM DOT CIRCUITS (QD) IN A CIRCUIT CAVITY QUANTUM ELECTRODYNAMICS (CQED) ARCHITECTURE. THE INTEREST OF SUCH HYBRID SYSTEMS LIES IN THE LIGHT-MATTER INTERACTION THAT OCCURS BETWEEN THE CAVITY MICROWAVE PHOTONS AND THE ELECTRONS OF THE QD. IN THIS THESIS WORK, CARBON NANOTUBES HAVE BEEN CHOSEN AS THE MATERIAL FOR THE QDS. INDEED, IT IS POSSIBLE TO OBSERVE VARIOUS ELECTRONIC TRANSPORT REGIMES IN SUCH SYSTEMS (FABRY-PEROT, COULOMB BLOCKADE AND KONDO). THEIR VERSATILITY IS ALSO A KEYPOINT AS IT IS POSSIBLE TO CONTACT THEM WITH VARIOUS TYPE OF METAL ELECTRODES (NORMAL, SUPERCONDUCTOR, FERROMAGNETIC METAL). THE EXPERIMENTAL REALIZATION OF SUCH DEVICES HAS SHOWN AN ELECTRON-PHOTON COUPLING OF THE ORDER OF 100MHZ, COMPARABLE TO STANDARD CQED COUPLINGS. THIS COUPLING IS TUNABLE BY PURELY ELECTRIC CONTROL. FINALLY, WEHAVE DEMONSTRATED THE DISTANT INTERACTION BETWEEN TWO QDS, SEPARATED BY 80µM, VIA THE MICROWAVE CAVITY PHOTONS. THESE RESULTS SHOWS THAT THESE DEVICES CAN BE USED FOR MANIPULATING THE QUANTUM INFORMATION AS WELL AS FOR SIMULATE ON-CHIP CONDENSED MATTER SITUATIONS. WE HAVE THEREFORE BEEN ABLE TO MEASURE THE QUANTUM CAPACITANCE OF THE QDS, AND IN PARTICULAR IN THE KONDO REGIME. WE HAVE ALSO SIMULATED THE ELECTRON-PHONON POLARONIC SHIFT IN THE CASE OF THE DISTANT INTERACTION BETWEEN THE TWO QDS.CETTE THESE A EU POUR OBJET DE REALISER EXPERIMENTALEMENT L'INTEGRATION DE CIRCUITS DE BOITE QUANTIQUE (QD) DANS UNE ARCHITECTURE D'ELECTRODYNAMIQUE QUANTIQUE EN CAVITE SUR CIRCUIT (CQED). L'INTERET DE CES SYSTEMES HYBRIDES RESIDE DANS L'INTERACTION LUMIERE-MATIERE QUI S'OPERE ENTRE LES PHOTONS DE LA CAVITE MICROONDE ET LES ELECTRONS DU QD. DANS CE TRAVAIL DE THESE, IL A ETE CHOISI D'UTILISER DES NANOTUBES DE CARBONE COMME MATERIAU POUR LES QDS. EN EFFET, ILS PERMETTENT L'OBSERVATION DE DIFFERENTS REGIMES DE TRANSPORT ELECTRONIQUE (FABRY-PEROT, BLOCAGE DE COULOMB ET KONDO) ET ILS SONT EGALEMENT POLYVALENTS VIS-A-VIS DES MATERIAUX AVEC LESQUELS IL EST POSSIBLE DE LES CONTACTER (METAL NORMAL, SUPRACONDUCTEUR, FERROMAGNETIQUE). LA REALISATION EXPERIMENTALE DE CES DISPOSITIFS A PERMIS DE MESURER UN COUPLAGE ELECTRON-PHOTON DE L'ORDRE DE 100MHZ, COMPARABLE AUX COUPLAGES OBTENUS EN CQED TRADITIONNELLE. CE COUPLAGE EST REGLABLE PAR DES MOYEN PUREMENT ELECTRIQUES. ENFIN, NOUS AVONS MIS EN EVIDENCE L'INTERACTION A DISTANCE ENTRE DEUX QDS SEPARES DE 80µM, PAR L'INTERMEDIAIRE DES PHOTONS MICROONDES. CES RESULTATS DEMONTRENT LE POTENTIEL DE CES DISPOSITIFS POUR DES APPLICATIONS A LA MANIPULATION DE L'INFORMATION QUANTIQUE AINSI QUE LA SIMULATION SUR PUCE DE PROBLEMES DE MATIERE CONDENSEE. NOUS AVONS PU AINSI MESURER LA CAPACITE QUANTIQUE DES QDS, NOTAMMENT DANS LE REGIME KONDO, ET SIMULER LE DECALAGE POLARONIQUE ELECTRON-PHONON, DANS LE CAS DE L'INTERACTION A DISTANCE ENTRE LES DEUX QDS
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