1,720,986 research outputs found
Shake-up Satellites In High Energy Auger Spectra Of The 4d Metals
No full textInterpretation of the satellites of the Cu L2,3M4,5M4,5 has involved considerable controversy in recent years. Reaching unambiguous conclusions is impeded by the contribution of Coster-Kronig (CK) transitions, requiring considerable experimental investigation before clarifying the relative roles of shake-up and CK processes. The L2,3M4,5M4,5 spectra of Ag, Pd and Rh excited by bremsstrahlung also have satellite features and manifest the following experimental systematics: both the L3 and L2 losses are displaced the same amount relative to their respective main peaks and their shapes are approximately the same; there seems to be little CK contribution; and comparison with alloy spectra indicate the intrinsic nature of the losses, consistent with energy loss measurements. We demonstrate that the satellite relative positions and lineshapes are consistent with the spectator vacancy interpretation, so that they appear to correspond basically to broadened, displaced "images" of the corresponding main spectra. It seems that the satellites are almost entirely caused by intra-atomic shake-up processes; the "image" nature of their lineshapes resembles that of extrinsic losses in other metals.357-358251254Kleiman, G.G., Landers, R., Nascente, P.A.P., De Castro, S.G.C., (1992) Phys. Rev. B, 46, p. 1970Mariot, J.-M., Ohno, M., (1986) Phys. Rev. B, 34, p. 2182Yoshii, K., Baba, Y., Sasaki, T.A., (1995) J. Electron Spectrosc., 72, p. 107Landers, R., Nascente, P.A.P., De Castro, S.G.C., Kleiman, G.G., (1992) J. Phys. Condens. Matter, 4, p. 5881Landers, R., Nascente, P.A.P., De Castro, S.G.C., Kleiman, G.G., (1993) Surf. Sci., 287-288, p. 802Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1993) Surf. Sci., 287-288, p. 798Landers, R., Kleiman, G., De Castro, S.G.C., (1995) J. Electron Spectrosc., 72, p. 211Kleiman, G.G., Landers, R., De Castro, S.G.C., (1994) J. Electron Spectrosc., 68, p. 329Kleiman, G.G., Landers, R., De Castro, S.G.C., (1994) Phys. Rev. B, 49, p. 2753Lang, N.D., Williams, A.R., (1977) Phys. Rev. B, 16, p. 2408Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1992) Phys. Rev. B, 45, p. 13899Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1991) Phys. Rev. B, 44, p. 3383Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1992) J. Vac. Sci. Technol. A, 10, p. 2839Kleiman, G.G., Landers, R., Nascente, P.A.P., De Castro, S.G.C., (1992) Phys. Rev. B, 46, p. 4405Kleiman, G.G., Landers, R., Nascente, P.A.P., De Castro, S.G.C., (1993) Surf. Sci., 287-288, p. 794Kleiman, G.G., (1993) J. Phys. Condens. Matter, 5, p. 1Kleiman, G.G., Landers, R., De Castro, S.G.C., Rogers, J.D., (1991) Phys. Rev., 644, p. 8529Kleiman, G.G., (1982) Appl. Surf. Sci., 11-12, p. 730Nascente, P.A.P., De Castro, S.G.C., Landers, R., Kleiman, G.G., (1991) Phys. Rev. B, 43, p. 4659Wagner, C.D., Taylor, J.A., (1980) J. Electron Spectrosc., 20, p. 83Sundaram, V.S., Rogers, J.D., Landers, R., (1981) J. Vac. Sci. Technol. A, 19, p. 117Condon, E.U., Shortley, G.H., (1963) The Theory of Atomic Spectra, , Cambridge University, LondonKleiman, G.G., Landers, R., De Castro, S.G.C., unpublishedLanders, R., Kleiman, G.G., De Castro, S.G.C., J. Electron Spectrosc., , in pressNyholm, R., Mårtensson, N., (1980) J. Phys. C, 13, pp. L279Mårtensson, N., Nyholm, R., (1981) Phys. Rev. B, 24, p. 7121noteMartensson, N., Johansson, B., (1983) Phys. Rev. B, 28, p. 3733Drube, W., Lessmann, A., Materlik, G., (1992) Jpn. J. Appl. Phys., 32, p. 17
Self-assembled Hybrid Films Of Phosphotungstic Acid And Aminoalkoxysilanes On Sio 2/si Surfaces
No full textThe present paper describes the influence of the chemical structure of two aminoalkoxysilanes: 3-aminopropyltriethoxysilane (APTS) and N-(3- (trimethoxysilyl)-propyl)-ethylenediamine (TSPEN) on the morphology of thin layer hybrid films with phosphotungstic acid (HPW), a Keggin heteropolyanion. X-ray photoelectron spectroscopy analyses indicated that both silane films showed protonated amine species interacting with the heteropolyanion by electrostatic forces as well as the presence of secondary carbamate anions. The hybrid films have different surface morphology according to atomic force microscopy analyses. The hybrid film with TSPEN forms flatter surfaces than the hybrid film with APTS. This effect is ascribed to higher flexibility and chelating ability of the TSPEN on adsorbed molecules. Ultrasonication effect on surface morphology of the hybrid film with APTS plays a fundamental role on surface roughness delivering enough energy to promote surface diffusion of the HPW heteropolyanions. This diffusion results in agglomerate formation, which corroborates with the assumption of electrostatic bonding between the HPW heteropolyanions and the protonated amine surface. These hybrid films could be used for electrochemical sensor design or to build photochromic and electrochromic multilayers. © 2011 Elsevier B.V. All rights reserved.520935743580Sagiv, J., (1980) J. Am. Chem. Soc., 102, p. 92Zhong, X., Yuan, R., Chai, Y.Q., Liu, Y., Dai, J.Y., Tang, D.P., (2005) Sens. Actuators, B, 104, p. 191Llorent-Martínez, E.J., García-Reyes, J.F., Ortega-Barrales, P., Molina-Díaz, A., (2005) Anal. Bioanal. 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Chem., 625, p. 208Cabibil, H.L., Pham, V., Lozano, J., Celio, H., Winter, R.M., White, J.M., (2000) Langmuir, 16, p. 10471Bunker, B.C., Carpick, R.W., Assink, R.A., Thomas, M.L., Hankins, M.G., Voigt, J.A., Sipola, D., Gulley, G.L., (2000) Langmuir, 16, p. 7742Shimizu, I., Okabayashi, H., Hattori, N., Taga, K., Yoshino, A., O'Connor, C.J., (1997) Colloid Polym. Sci., 275, p. 293Kornherr, A., Hansal, S., Hansal, W.E.G., Besenhard, J.O., Kronberger, H., Nauer, G.E., Zifferer, G., (2003) J. Chem. Phys., 119, p. 9719Fiorilli, S., Rivolo, P., Descrovi, E., Ricciardi, C., Pasquardini, L., Lunelli, L., Vanzetti, L., Garrone, E., (2008) J. 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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Electronic Structure Information Of Metals And Alloys From Auger And Photoemission
No full textWe report some of the results of extensive experimental and theoretical studies by our group of the XPS and Auger spectra of the transition and noble metals and some of their alloys: we concentrate on those aspects of the spectra which regard the determination of electronic structure. Consideration of the Auger kinetic energies yields insight into screening mechanisms and suggests methods for extracting electronic structure changes in alloys from XPS and XAES shifts. We demonstrate that the charge transfer in a number of alloys (AuPd, CuPd, AgPd, AuCu, AgAu and CuNi) appears to be negligible (i.e., on the order of hundredths of electrons/atom). Examples (i.e., AuZn, AuMg, AuPd, AgPd and CuNi) of the results for the d- and sp-electron occupations are given. © 2004 Elsevier B.V. All rights reserved.2281-2 SPEC. ISS.137143Kleiman, G.G., Landers, R., (1998) J. Electron. Spectrosc. Relat. Phenom., 88-91, p. 435Kleiman, G.G., Landers, R., De Castro, S.G.C., (1995) J. Electron. Spectrosc. Relat. Phenom., 72, p. 199Kleiman, G.G., Landers, R., (1995) J. Electron. Spectrosc. Relat. Phenom., 76, p. 319Kleiman, G.G., (1982) 11/12 Appl. Surf. Sci., p. 730Kleiman George, G., (1995) Phys. Status Solidi B, 192, p. 503Kleiman, G.G., (1999) J. Electron. Spectrosc. Relat. Phenom., 100, p. 17Kleiman, G.G., (2002) J. Electron. Spectrosc. Relat. Phenom., 127, p. 53Lang, N.D., Williams, A.R., (1977) Phys. Rev. B, 16, p. 2408Lang, N.D., Williams, A.R., (1979) Phys. Rev. B, 20, p. 1369Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1992) Phys. Rev. B, 45, p. 13899Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1993) Surf. Sci., 287-288, p. 794Cini, M., (1977) Solid State Commun., 24, p. 681Cini, M., (1978) Phys. Rev. B, 17, p. 2486Sawatzky, G.A., (1977) Phys. Rev. Lett., 39, p. 504noteMårtensson, N., Johansson, B., (1980) Phys. Rev. Lett., 45, p. 482Mårtensson, N., Hedegard, P., Johansson, B., (1987) Phys. Scripta, 29, p. 154Mårtensson, N., Nyholm, R., Johansson, B., (1980) Phys. Rev. Lett., 45, p. 754Johansson, B., Mårtensson, N., (1980) Phys. Rev. B, 21, p. 4427Williams, A.R., Lang, N.D., (1978) Phys. Rev. Lett., 40, p. 954Kleiman, G.G., Landers, R., Nascente, P.A.P., De Castro, S.G.C., (1992) Phys. Rev. B, 46, p. 4405Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1991) Phys. Rev. B, 44, p. 3383Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1992) J. Vac. Sci. and Technol. a, 10, p. 2839Kleiman, G.G., De Castro, S.G.C., Rogers, J.D., Sundaram, V.S., (1982) Solid State Commun., 43, p. 257Rogers, J.D., Sundaram, V.S., Kleiman, G.G., De Castro, S.G.C., Douglas, R.A., Peterlevitz, A.C., (1982) J. Phys. F, 12, p. 2097Hohenberg, P., Kohn, W., (1964) Phys. Rev., 136, p. 864Kohn, W., Sham, L.J., (1965) Phys. Rev., 140, p. 113Thomas, T.D., Weightman, P., (1986) Phys. Rev. B, 33, p. 5406Gelatt Jr., C.D., Ehrenreich, H., (1974) Phys. Rev. B, 10, p. 398Mueller, F.M., (1967) Phys. Rev., 153, p. 659Kleiman, G.G., Landers, R., De Castro, S.G.C., Rogers, J.D., (1991) Phys. Rev. B, 44, p. 8529Nascente, P.A.P., De Castro, S.G.C., Landers, R., Kleiman, G.G., (1991) Phys. Rev. B, 43, p. 4659Landers, R., De Castro, S.G.C., Kleiman, G.G., (1994) J. Electron. Spectrosc. Relat. Phenom., 68, p. 145Winter, H., Durham, P.J., Temmerman, W.M., Stocks, G.M., (1986) Phys. Rev. B, 33, p. 2370Magri, R., Wei, S.H., Zunger, A., (1990) Phys. Rev. B, 42, p. 11388Johnson, D.D., Pinski, F.J., (1993) Phys. Rev. B, 48, p. 11553Cole, R.J., Gregory, D.A.C., Weightman, P., (1994) Phys. Rev. B, 49, p. 5657Cole, R.J., Matthew, J.A.D., Weightman, P., (1995) J. Electron. Spectrosc. Relat. Phenom., 72, p. 255Barbieri, P.F., De Siervo, A., Carazzolle, M.F., Landers, R., Kleiman, G.G., (2004) J. Electron. Spectrosc. Relat. Phenom., 135, p. 11
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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