1,720,966 research outputs found
Correlations between dip coating-fabricated cellulose acetate membranes characteristics and their permeability to glucose and glucose oxidase
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Politiche integrate di prodotto per la realizzazione di un inchiostro inkjet ecologico
No full textNell’ottica di una Politica Integrata di Prodotto (IPP), abbiamo studiato il ciclo di vita di un inchiostro per stampa ink jet a carattere alimentare da utilizzare nell’office, al fine di ottenere un prodotto ecocompatibile in termini di riciclo di carta e cartucce esauste. Al termine dello studio è stato ottenuto un prodotto “ecologico” che riduce gli impatti ambientali del 68% rispetto ad un prodotto “tradizionale”.
The aim of the research, in an Integrated Policy of Product, was to study the life cycle of a food suitable ink for ink-jet printing. This ink, used for office purpose, should be an environmental friendly product considering the paper and cartridges recycle. We produced an “ecological” product which reduces the environmental impacts of about 68% compared with “traditional” once
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
Microdeposizione inkjet di macromolecole sintetiche e biologiche per la realizzazione di biosensori
No full textBiopolytronics for the computer-assisted fabrication of bioelectronic devices
No full textFor many years, the electronic transducers have been dominated by inorganic materials. However, mechanical flexibility is often necessary as this would allow the integrated circuits to be twisted, bent and rolled without any effect on the electrical characteristics of the device. On the basis conducting polymers have attracted much interest for the development of biosensors due to their propertiesto be excellent materials for immobilization of biomolecules, favouring the rapid transfer of the charges produced by the biochemical reactions to the electronic circuitry used for the signal elaboration. In 2000 Sirringhaus et al. (Science 290, 2123) have demonstrated a direct inkjet printing of complete transistor circuits, based on solution-processed polymer conductors, insulators and self-organizing semiconductors and recently we have developed a set of techniques for the realization of computer-assisted design and fabrication of third generation biosensors based on synthetic macromolecules, as charge-transfer mediators and protective layers, and biological molecules, as sensing elements (Setti et al., 2005), which was named biopolytronics.
With ink jet technology, virtually any complex bioelectronic pattern can be directly printed to a flexible or rigid surface in the size of a pixel using electronic and biological inks, giving very high-resolution patterns.
Here we present an overview on biopolytronics reporting possible approaches for formulating biologically and electronically active water-based inks for thermal inkjet technology, containing respectively different enzymatic activities (redox enzymes such as glucose oxidase and peroxidase) and conjugated polymers (conducting polymers such as PEDOT/PSS and regioregular poly(3-hexylthiophene), r-P3HT), opening the way for a wide range of possibilities in the realization of bioelectronic devices using inkjet technology
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
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