1,721,012 research outputs found
The dependence of the preferred orientation and piezoelectric property of Pb(Zr-0.52,Ti-0.48)O-3 (PZT) thin film on the deposition temperature
No full textWe investigated the dependence of the preferred orientation and piezoelectric properties of PZT thin films on the deposition temperature using atomic force microscope (AFM). PZT thin films were fabricated on Pt(111)/TiOx/SiO2/Si(100) substrates from 250 to 500 by radio frequency (rf) magnetron sputtering and then crystallized at 650 for 10 min. The preferred orientation of PZT thin film was changed from (001) to (110) as the deposition temperature increased. We thought that this tendency was due to the change of both the microstructures of as-deposited PZT thin films and the Pb content. The surface roughness of PZT thin films decreased with the increase of deposition temperature. The maximum amplitude of piezoelectric response of PZT thin films decreased till the deposition temperature increased to 350, while this maximum value decreased up to 450 because of both the increase of the surface roughness and the degradation of the crystallinity.Institute of Information Technology Assessmen
The dependence of the preferred orientation and piezoelectric property of Pb(Zr0.52,Ti0.48)O3 (PZT) thin film on the deposition temperature
No full textA shared buffer-constrained topology reconfiguration scheme in wavelength routed networks
No full textThe reconfiguration management scheme changes a logical topology in response to changing traffic patterns in the higher layer of a network or the congestion level on the logical topology. In this paper, we formulate a reconfiguration scheme with a shared buffer-constrained cost model based on required quality-of-service (QoS) constraints, reconfiguration penalty cost, and buffer gain cost through traffic aggregation. The proposed scheme maximizes the derived expected reward-cost function as well as guarantees the required flow's QoS. Simulation results show that our reconfiguration scheme significantly outperforms the conventional one, while the required physical resources are limited
A Shared Buffer Constrained Topology Reconfiguration Scheme in Wavelength Routed Networks
No full textEffects of NH3 Carrier Gas on the Deposition and Electrical Characterics of SrTiO3 Films Grown by ECR Plasma Assisted MOCVD
No full textMechanics of metallic foams: A fractal approach
No full textA fractal approach was proposed to investigate the meso structures and size effect of metallic foams: For a series At foams of different relative densities, the information dimension method was applied to measure meso structures. The generalized sierpinski carpet was introduced to map the meso structures of the foam according to specific dimension. The results show that the fractal-based model can not only reveal the variation of yield strength with specimen size, but also bridge the meso structures and mechanical proper-ties of Al foams directly. Key words: metallic foams; fractal; size effect; meso structure
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
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