1,720,982 research outputs found
Soft on Tissue, Strong on Signal: Enabling Tissue Compatible Pressure Sensing Conductive Hydrogels via Oxidative Chemical Vapor Deposition
No full textThis dataset contains processed data supporting the publication "Soft on Tissue, Strong on Signal: Enabling Tissue Compatible Pressure Sensing Conductive Hydrogels via Oxidative Chemical Vapor Deposition". It has data related to 4-point probe measurements, stylus-profilometry, Fourier-transform infrared spectroscopy, EDX line scan, tensile testing, compression testing, digital multimeter measurements, and analysis of fluorescence microscopy images. The accompanying Excel worksheet is organized with all data indexed by figure numbers corresponding to the main manuscript and supplementary information
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
Chemical design of supramolecular microgels : from volume assembly to stimulation of interfaces
No full textNous avons élaboré des microgels stimulables pouvant servir de briques élémentaires pour des assemblages colloïdaux en dispersion ou aux interfaces. Pour cela, des microgels thermosensibles de poly(N-isopropylacrylamide), PNiPAM, co-polymérisés avec des greffons poly(éthylèneglycol) terminés par une fonction soit hydroxyle (PEGMAOH) soit terpyridine (PEGMATpy) sont synthétisés. L’incorporation et la localisation des greffons PEGylés dans le réseau des microgels permet de contrôler la taille et la stabilité colloïdale des microgels sans affecter leurs propriétés thermosensibles. Les microgels fonctionnalisés sont utilisés comme briques élémentaires pour former des assemblages en dispersion via des interactions métallo-supramoléculaires. Ces interactions sont induites par la formation de complexes de coordination, [MIITpy2]2+, entre les fonctions terpyridine portées par les microgels et des cations métalliques (FeII, CoII, …). L’effet de paramètres physico-chimiques tels que la salinité, la température, le pH, l’ajout d’un polymère déplétant sur la formation d’assemblages entre microgels est étudié. La stimulabilité des interactions supramoléculaires en milieu oxydant permet de dissocier les assemblages formés en microgels individualisés en solution. La formation des complexes [MIITpy2]2+ permet également la synthèse de microgels supramoléculaires, supra-MG, dont la structure interne est contrainte par des points de réticulation supramoléculaires. Ces microgels dont la structure interne est clivable sont utilisés comme émulsifiants d’émulsions de type Pickering-Ramsden pouvant être déstabilisées par stimulation électrochimique.We report on the synthesis of stimulable microgels that are used as building-block for colloidal assemblies in dispersions or at interfaces. To achieve this goal, we synthesized thermosensitive poly(N-isopropylacrylamide), PNiPAM, microgels copolymerized with poly(ethyleneglycol) grafts bearing either a hydroxyl (PEGMAOH) or a terpyridine (PEGMATpy) terminated function. The incorporation and localization of the PEGylated grafts within the microgels network enables a control on both the size and colloidal stability of the microgels without changing their thermosensitivity. The functionalized microgels were then used as building-blocks to build assemblies in dispersions by means of metallo-supramolecular interactions. These interactions are induced by the formation of coordination complexes, [MIITpy2]2+, between the terpyridine functions of the microgels and metallic cations (FeII, CoII, …). We studied the effects of physico-chemical parameters such as salinity, temperature, pH, addition of a depletant polymer on the formation of inter-microgels assemblies. The stimulability via an oxidative medium of the supramolecular interactions allows to dissociating the assemblies into individualized microgels in solution. The formation of [MIITpy2]2+ complexes also allows the synthesis of supramolecular microgels, supra-MG, which internal structure is maintained by supramolecular crosslinks. These microgels, which network structure can be cleaved, are used as emulsifiers of Pickering-Ramsden emulsions. The liquid-liquid dispersions can be destabilized on demand by electrochemical stimulation
Design chimique de microgels supramoléculaires : de l'assemblage en volume à la stimulation d'interfaces
No full textWe report on the synthesis of stimulable microgels that are used as building-block for colloidal assemblies in dispersions or at interfaces. To achieve this goal, we synthesized thermosensitive poly(N-isopropylacrylamide), PNiPAM, microgels copolymerized with poly(ethyleneglycol) grafts bearing either a hydroxyl (PEGMAOH) or a terpyridine (PEGMATpy) terminated function. The incorporation and localization of the PEGylated grafts within the microgels network enables a control on both the size and colloidal stability of the microgels without changing their thermosensitivity. The functionalized microgels were then used as building-blocks to build assemblies in dispersions by means of metallo-supramolecular interactions. These interactions are induced by the formation of coordination complexes, [MIITpy2]2+, between the terpyridine functions of the microgels and metallic cations (FeII, CoII, …). We studied the effects of physico-chemical parameters such as salinity, temperature, pH, addition of a depletant polymer on the formation of inter-microgels assemblies. The stimulability via an oxidative medium of the supramolecular interactions allows to dissociating the assemblies into individualized microgels in solution. The formation of [MIITpy2]2+ complexes also allows the synthesis of supramolecular microgels, supra-MG, which internal structure is maintained by supramolecular crosslinks. These microgels, which network structure can be cleaved, are used as emulsifiers of Pickering-Ramsden emulsions. The liquid-liquid dispersions can be destabilized on demand by electrochemical stimulation.Nous avons élaboré des microgels stimulables pouvant servir de briques élémentaires pour des assemblages colloïdaux en dispersion ou aux interfaces. Pour cela, des microgels thermosensibles de poly(N-isopropylacrylamide), PNiPAM, co-polymérisés avec des greffons poly(éthylèneglycol) terminés par une fonction soit hydroxyle (PEGMAOH) soit terpyridine (PEGMATpy) sont synthétisés. L’incorporation et la localisation des greffons PEGylés dans le réseau des microgels permet de contrôler la taille et la stabilité colloïdale des microgels sans affecter leurs propriétés thermosensibles. Les microgels fonctionnalisés sont utilisés comme briques élémentaires pour former des assemblages en dispersion via des interactions métallo-supramoléculaires. Ces interactions sont induites par la formation de complexes de coordination, [MIITpy2]2+, entre les fonctions terpyridine portées par les microgels et des cations métalliques (FeII, CoII, …). L’effet de paramètres physico-chimiques tels que la salinité, la température, le pH, l’ajout d’un polymère déplétant sur la formation d’assemblages entre microgels est étudié. La stimulabilité des interactions supramoléculaires en milieu oxydant permet de dissocier les assemblages formés en microgels individualisés en solution. La formation des complexes [MIITpy2]2+ permet également la synthèse de microgels supramoléculaires, supra-MG, dont la structure interne est contrainte par des points de réticulation supramoléculaires. Ces microgels dont la structure interne est clivable sont utilisés comme émulsifiants d’émulsions de type Pickering-Ramsden pouvant être déstabilisées par stimulation électrochimique
Design chimique de microgels supramoléculaires : de l'assemblage en volume à la stimulation d'interfaces
No full textWe report on the synthesis of stimulable microgels that are used as building-block for colloidal assemblies in dispersions or at interfaces. To achieve this goal, we synthesized thermosensitive poly(N-isopropylacrylamide), PNiPAM, microgels copolymerized with poly(ethyleneglycol) grafts bearing either a hydroxyl (PEGMAOH) or a terpyridine (PEGMATpy) terminated function. The incorporation and localization of the PEGylated grafts within the microgels network enables a control on both the size and colloidal stability of the microgels without changing their thermosensitivity. The functionalized microgels were then used as building-blocks to build assemblies in dispersions by means of metallo-supramolecular interactions. These interactions are induced by the formation of coordination complexes, [MIITpy2]2+, between the terpyridine functions of the microgels and metallic cations (FeII, CoII, …). We studied the effects of physico-chemical parameters such as salinity, temperature, pH, addition of a depletant polymer on the formation of inter-microgels assemblies. The stimulability via an oxidative medium of the supramolecular interactions allows to dissociating the assemblies into individualized microgels in solution. The formation of [MIITpy2]2+ complexes also allows the synthesis of supramolecular microgels, supra-MG, which internal structure is maintained by supramolecular crosslinks. These microgels, which network structure can be cleaved, are used as emulsifiers of Pickering-Ramsden emulsions. The liquid-liquid dispersions can be destabilized on demand by electrochemical stimulation.Nous avons élaboré des microgels stimulables pouvant servir de briques élémentaires pour des assemblages colloïdaux en dispersion ou aux interfaces. Pour cela, des microgels thermosensibles de poly(N-isopropylacrylamide), PNiPAM, co-polymérisés avec des greffons poly(éthylèneglycol) terminés par une fonction soit hydroxyle (PEGMAOH) soit terpyridine (PEGMATpy) sont synthétisés. L’incorporation et la localisation des greffons PEGylés dans le réseau des microgels permet de contrôler la taille et la stabilité colloïdale des microgels sans affecter leurs propriétés thermosensibles. Les microgels fonctionnalisés sont utilisés comme briques élémentaires pour former des assemblages en dispersion via des interactions métallo-supramoléculaires. Ces interactions sont induites par la formation de complexes de coordination, [MIITpy2]2+, entre les fonctions terpyridine portées par les microgels et des cations métalliques (FeII, CoII, …). L’effet de paramètres physico-chimiques tels que la salinité, la température, le pH, l’ajout d’un polymère déplétant sur la formation d’assemblages entre microgels est étudié. La stimulabilité des interactions supramoléculaires en milieu oxydant permet de dissocier les assemblages formés en microgels individualisés en solution. La formation des complexes [MIITpy2]2+ permet également la synthèse de microgels supramoléculaires, supra-MG, dont la structure interne est contrainte par des points de réticulation supramoléculaires. Ces microgels dont la structure interne est clivable sont utilisés comme émulsifiants d’émulsions de type Pickering-Ramsden pouvant être déstabilisées par stimulation électrochimique
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
- …
