1,721,063 research outputs found
Temperature dependence of electronic states in (TaSe4)(2)I - Reply
No full textWe reject the assertion of Claessen et al., confirm the validity of our data, and discuss possible causes for the disagreement.LSELPRXEcole polytech fed lausanne,iga,ch-1015 lausanne,switzerland. univ wisconsin,dept phys,madison,wi 53706. Terrasi, A, ECOLE POLYTECH FED LAUSANNE,INST PHYS APPL,CH-1015 LAUSANNE,SWITZERLAND.ISI Document Delivery No.: YH16
X-RAY PHOTOELECTRON-SPECTROSCOPY AND SCANNING ELECTRON- MICROSCOPY OF BETA-FESI2 FILMS GROWN BY ION-BEAM-ASSISTED DEPOSITION
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TCO/Ag/TCO transparent electrodes for solar cells application
No full textAmong transparent electrodes, transparent conductive oxides (TCO)/metal/TCO structures can achieve optical and electrical performances comparable to, or better than, single TCO layers and very thin metallic films. In this work, we report on thin multilayers based on aluminum zinc oxide (AZO), indium tin oxide (ITO) and Ag deposited by RF magnetron sputtering on soda lime glass at room temperature. The TCO/Ag/TCO structures with thicknesses of about 50/10/50 nm were deposited with all combinations of AZO and ITO as top and bottom layers. While the electrical conductivity is dominated by the Ag intralayer irrespective of the TCO nature, the optical transmissions show a dependence on the nature of the top and bottom TCOs, mainly due to the change in the reflectivity of the multilayers. Structural, electrical and optical properties are studied to optimize the structure for very thin transparent electrodes suitable for photovoltaic applications. © 2014 Springer-Verlag Berlin Heidelberg
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
Ar+ Bombardment of Si(100) in Oxygen Atmosphere - Room-Temperature Oxide Formation Studied by X-Ray Photoelectron-Spectroscopy
No full textWe report the formation of silicon oxide thin films at room temperature obtained by Ar+ ion bombardment of Si(100) wafers in partial oxygen atmosphere. Samples have been prepared at several ion beam energies (0 less than or equal to E(b) less than or equal to 400 eV) and characterized by x-ray photoelectron spectroscopy. The oxidation rate, as well as the SiO2/SiOx (x = 0.5, x = 1, and x = 1.5) ratio, have been found to increase with the ion beam energy. For the highest energy bombardment, E(b) = 400 eV, we observed the formation of a uniform, electrically insulating, SiO2 top layer about 37 Angstrom thick. (C) 1995 American Institute of Physics.LSELPRXCnr,ist nazl metodol & tecnol microelettron,i-95121 catania,italy. Terrasi, a, ecole polytech fed lausanne,inst phys appl,ch-1015 lausanne,switzerland.ISI Document Delivery No.: RU95
X-RAY PHOTOELECTRON-SPECTROSCOPY AND SCANNING ELECTRON-MICROSCOPY OF BETA-FESI2 FILMS GROWN BY ION-BEAM-ASSISTED DEPOSITION
No full textThis paper reports the investigation of polycrystalline beta-FeSi2 films grown by Ion Beam Assisted Deposition (IBAD), performed by using a broad Ar+ beam bombarding (001) Si substrates during the evaporation of Fe atoms. Several energies (200-650 eV) and current densities (10-70 muA cm-2) have been used for the Ar+ beam, keeping the Fe evaporation rate at about 0.08 nm s-1. The formation of the silicide was achieved by in situ thermal annealing at T = 600-degrees-C, performed during or after the deposition process. Rutherford Backscattering Spectroscopy (RBS), Scanning Electron Microscopy (SEM) and X-Ray Photoelectron Spectroscopy (XPS) have been used to study the stoichiometry, the morphology and the chemical status of several samples obtained using different ion beam parameters. Strong morphological improvements, such as smoothing and pinhole closing, are observed for the IBAD films grown during thermal annealing. The XPS depth profiling technique has been used to investigate the morphology of the silicide/Si interface
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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