121,909 research outputs found
Festschrift für Ernst Siegmann zum 60. Geburtstag, redigiert von Joachim Latacz
No full textGranarolo Jean. Festschrift für Ernst Siegmann zum 60. Geburtstag, redigiert von Joachim Latacz. In: Bulletin de l'Association Guillaume Budé : Lettres d'humanité, n°35, décembre 1976. p. 436
Planeur Torcol , plan et méthode de construction, par Paul Dierstein. Préface d'Edouard Siegmann. N° 1
No full textAvec mode text
Electron spin polarization in field emission from Gd
No full textMüller N, Siegmann HC, Obermair G. Electron spin polarization in field emission from Gd. Physics Letters, A. 1967;24(13):733-734.Theoretical considerations of the conduction electron polarization in Gd are reported. They predict that 5–10% polarization ought to be measured in an electron beam produced by field emission
Orientation dependence of multiple ionization of diatomic molecules in collisions with fast highly charged ions
No full textSiegmann B, Werner U, Mann R, Kaliman Z, Kabachnik NM, Lutz HO. Orientation dependence of multiple ionization of diatomic molecules in collisions with fast highly charged ions. Physical Review A. 2002;65(1): 010704.We report an observation of the strong dependence of the multiple (6<q&LE;10) ionization cross section on the alignment of the molecular axis in collisions of highly charged Xe ions with N-2 molecules at an impact energy of 5.9 MeV/amu. Theoretical calculations based on the statistical-energy-deposition model well describe the experimental data
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
Kinetic energy release distributions in the Coulomb explosion of N-2 molecules induced by fast, highly-charged-ion impact
No full textSiegmann B, Werner U, Mann R, Kabachnik NM, Lutz HO. Kinetic energy release distributions in the Coulomb explosion of N-2 molecules induced by fast, highly-charged-ion impact. Physical Review A. 2000;62(2): 022718.The dissociation of molecular ions (N-2)(q+) produced by 4.7 MeV/amu Bi-57+,Bi-25+ and 5.9 MeV/amu Xe-43+,Xe-18+ ion impact on N-2 has been studied using the coincidence technique with a position- and time-sensitive multiparticle detector. The kinetic energy release distributions for all observed ion pairs Nq1+ +Nq2+ are measured. Analysis of the distributions is made with emphasis on the highly charged-molecular ions, q>3. In these cases the most probable total kinetic energy of the two fragments is quite well described by the Coulomb explosion model for point charges, while the measured width of the distributions is much larger than that predicted by this simplified model. We therefore suggest a more elaborate model of Coulomb fragmentation based on a statistical description of the individual potential energy curves of the molecular ion This enables us to describe both the position and the width of the kinetic energy release distributions. We suggest that the main cause of the large width of the distributions for the high q values is the spread of the potential energy curves at the equilibrium internuclear distance; this is mainly due to the dispersion interaction arising from the mutual polarization of the atomic ions
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
The vanishing author in computer-generated works: a critical analysis of recent Australian case law
No full textAbstract
The use of software is ubiquitous in the creation of many copyright works, yet the requirement in copyright law that every work have a human author who engages in independent intellectual effort means that its use may prevent copyright subsistence. Several recent Australian cases have refocused attention on authorship as an essential criterion of copyright subsistence, and these cases suggest that much computer-produced output may be authorless and thus lack copyright protection. This article, the first in a two-part series, analyses how each case deals with the question of authorship of computer-produced works and why the use of software diminishes copyright protection for a significant number of computer-generated works. The article critiques the application of conventional notions of human authorship developed in the pre-computer age to modern productions and suggests alternative approaches to authorship that satisfy both the major objectives of copyright policy and the need to adapt to the computer age. The article argues that, without a broader judicial approach to authorship of computer-generated works, Parliament must remedy the lacuna in protection for these ‘authorless’ works. Possible solutions for reform are suggested. In a forthcoming article, the author comprehensively examines those reform proposals
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Orientation dependence of N-2 and O-2 multiple ionization in slow and fast collisions with highly charged Xe-ions
No full textSiegmann B, Werner U, Lebius H, Huber B, Lutz HO, Mann R. Orientation dependence of N-2 and O-2 multiple ionization in slow and fast collisions with highly charged Xe-ions. In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. Nuclear Instruments & Methods in Physics Research Section B - Beam Interactions with Materials and Atoms. Vol 205. ELSEVIER SCIENCE BV; 2003: 629-633.The influence of the molecular orientation on the multiple ionization of N-2 and 02 was studied in collisions with highly charged Xe-ions at velocities of 0.2-0.3 and approximate to15 a.u. The applied technique is based on a position- and time-sensitive multi-particle detector which allows to determine the ionization cross-section as a function of the orientation of the molecular axis. At lower collision energies, e.g. in collisions with 360 keV Xe18+, no anisotropy was found, whereas in collisions with 770 MeV Xe18+ significant orientation effects appear at higher degrees of ionization. (C) 2003 Elsevier Science B.V. All rights reserved
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