1,721,148 research outputs found
Electrical characterization of self-aligned titanium silicide SBDs formed by furnace annealing
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Electronic Applications
No full textIn the last years, additive manufacturing technologies have been widely implemented in the production of electronic components. The possibility of incorporating electronic functionalities in complex-shaped devices together with the multimaterial and multilayered fabrication capability has brought to the realization by 3D printing approaches of passive elements such as resistors, capacitors, and conductive traces, active elements like transistors and LEDs (light-emitting diodes), and also multiple examples of sensors and actuators. Compared to traditional production, 3D printing electronics resulted as one of the most promising technologies for producing parts in a more effective and efficient manner.
Here, we review the state of the art related to the research activity in fabricating electronic passive elements and active elements. We also focus on 3D printed sensors and actuators, discussing both the physical working principles and the application fields of the different components
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
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
Preparation and characterization of cassava starch acetate with high substitution degree
No full textIn this work, cassava starch (CS) was acetylated by a simple and scalable method to produce a highly hydrophobic polymeric material with potential use in coating and food packaging. The chemical structure, thermal stability and morphological properties of cassava starch acetate (CSA) were determined. Their formation was confirmed using FTIR by the presence of the carbonyl signal around 1749 cm-1. Degrees of substitution (DS) obtained by titration were between 1.9 and 2.9.Thermogravimetric analysis showed an increase in thermal stability with acetylation, the DS=2.9 sample behaving as a homopolymer. SEM micrographs showed the loss of the structure of the starch granule and the appearance of a beehive-shaped new structures.CS and CSA were structurally characterized by NMR. The CS branching percentage obtained by 1H-NMR was 4.76. Using quantitative 13C{1H}-NMR the DS was calculated, confirming the values already obtained and the regioselective substitution pattern was determined, demonstrating that the favorite position of acetylation is that of C6.Fil: Cuenca, Pamela Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; ArgentinaFil: Ferrero, Sergio. Universidad de Valladolid; EspañaFil: Albani, Oscar Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentin
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