1,720,967 research outputs found
Orientation dependence of the sticking probability of NO at Ni(100)
Get PDFFecher GH, Volkmer M, Pawlitzky B, Böwering N, Heinzmann U. Orientation dependence of the sticking probability of NO at Ni(100). Vacuum. 1990;41(1-3):265-268
Dependence of the sticking probability on initial molecular orientation: NO on Ni(100)
Get PDFFecher GH, Böwering N, Volkmer M, Pawlitzky B, Heinzmann U. Dependence of the sticking probability on initial molecular orientation: NO on Ni(100). Surface science letters. 1990;230:L169-L172
Experimental studies of the adsorption of oxygen and nitric oxide at Ni(100)
Get PDFVolkmer M, Nolting K, Fecher GH, Dierks B, Heinzmann U. Experimental studies of the adsorption of oxygen and nitric oxide at Ni(100). Vacuum. 1990;41(1-3):109-111
Recent measurements of the sticking probability of oriented NO at Ni(100)
Get PDFFecher GH, Volkmer M, Böwering N, Pawlitzky B, Heinzmann U. Recent measurements of the sticking probability of oriented NO at Ni(100). Journal of the Chemical Society, Faraday transactions 2: Molecular and chemical physics. 1989;85:1364-1367
Chemical microanalysis by selected-area ESCA using an electron energy filter in a photoemission microscope
No full textSchmidt O, Ziethen C, Fecher GH, et al. Chemical microanalysis by selected-area ESCA using an electron energy filter in a photoemission microscope. In: Journal of Electron Spectroscopy and Related Phenomena. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. Vol 88. ELSEVIER SCIENCE BV; 1998: 1009-1014.We present a new and simple device for microspectroscopy being independent of the mode of electron-excitation. Micro-Xray photoelectron spectroscopy, electron-induced Anger-spectroscopy, as well as local energy-loss spectroscopy were used to investigate metal-adsorption on silicon. This new approach employs a non-imaging electron energy analyser attached to a new-generation photoemission electron microscope with integral microarea selector. Photoelectron microspectroscopy was performed using the direct beam of an undulator (U2 at BESSY) being monochromatised and focused by means of multilayer optics at hv = 95 eV. Similarly, local Auger-electron and EELS spectra have been taken using a simple electron gun for the excitation. The chemical compositions of inhomogenities in thin layers of indium on silicon and the local state of oxidation of a structured Pt-Co multilayer have been determined. (C) 1998 Elsevier Science B.V
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
Heusler compounds as ternary intermetallic nanoparticles: Co2FeGa
No full textThis work describes the preparation of ternary nanoparticles based on the Heusler compound Co2FeGa. Nanoparticles with sizes of about 20 nm were synthesized by reducing a methanol impregnated mixture of CoCl2 center dot 6H(2)O, Fe(NO3)(3) center dot 9H(2)O and Ga(NO3)(3) center dot xH(2)O after loading on fumed silica. The dried samples were heated under pure H-2 gas at 900 degrees C. The obtained nanoparticles-embedded in silica-were investigated by means of x-ray diffraction (XRD), transmission electron microscopy, temperature dependent magnetometry and Mossbauer spectroscopy. All methods clearly revealed the Heusler-type L2(1) structure of the nanoparticles. In particular, anomalous XRD data demonstrate the correct composition in addition to the occurrence of the L2(1) structure. The magnetic moment of the particles is about 5 mu(B) at low temperature in good agreement with the value of bulk material. This suggests that the half-metallic properties are conserved even in particles on the 10 nm scale. RI Balke, Benjamin/A-5958-2009; Felser, Claudia/A-5779-2009; Kolb, Ute/A-2642-2011; Mugnaioli, Enrico/E-6237-2011; Fecher, Gerhard/H-2470-2011; Jenkins, Catherine/A-7740-201
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
- …
