1,720,986 research outputs found
Microelectromechanical thin film device of transition metal oxide, and manufacturing method thereof
No full textMultistate Memory Devices Based on Free-standing VO2/TiO2 Microstructures Driven by Joule Self-Heating
No full textTwo-terminal multistate memory elements based on VO2/TiO2 thin film microcantilevers are reported. Volatile and non-volatile multiple resistance states are programmed by current pulses at temperatures within the hysteretic region of the metal-insulator transition of VO2. The memory mechanism is based on current-induced creation of metallic clusters by self-heating of micrometric suspended regions and resistive reading via percolation
Fabrication and electromechanical actuation of epitaxial SrTiO3 (0 0 1) microcantilevers
No full textWe report on the fabrication, mechanical characterization and electrostatic actuation of dielectric STO(0 0 1) thin film microcantilevers (MCs). Finite element analysis (FEA) is used for mechanical analysis and for calculating the distribution and the magnitude of the dielectric forces on the actual devices. The actuation of insulating oxide microstructures is of potential interest in the field of ferroelectric/multiferroic materials as well as for developing novel detecting schemes on dielectric oxides. © 2013 IOP Publishing Ltd
All-oxide crystalline microelectromechanical systems fabrication technique for strontium titanate microcantilevers
No full textAbstract View references (12)
A microelectromechanical system (MEMS) entirely made of crystalline oxides is presented. A suspended SrTiO3 (001) microcantilever is employed as flexible substrate for the deposition of epitaxial transition-metal oxide films. A strain-generator device for epitaxial oxide films can be fabricated. Strain at surface can be performed by bending downward the microcantilever. The mechanical properties of these oxide MEMS are modeled by finite element methods and are in accordance with preliminary mechanical characterizations performed with Atomic Force Microscopy. Evaluation of the applied strain and its distribution along the microcantilever is also given. © 2009 IEEE NANO Organizers
One step into Holmes project. Simulation of the deposition of a metallic Ho film on a target.
No full textThis work shows one of the activity of the group in the framework of the HOLMES project for direct neutrino mass search.
Starting from Ho oxide and working at high temperature, it is possible to obtain the deposition of a metal Ho film which is necessary for the implantation into cryogenic detectors.
A simulation has been developed to evaluate the distribution of the deposition of metallic Holmium onto a target used as a trap and to estimate the efficiency of the process and eventually optimize controllable parameters.
Object of this work is the simulation itself, its design, implementations and a discussion of the results
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
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