104,678 research outputs found
Spin-resolved photoelectron spectroscopy of HBr in the resonance region of electron autoionization
No full textSalzmann M, Böwering N, Klausing H-W, Kuntze R, Heinzmann U. Spin-resolved photoelectron spectroscopy of HBr in the resonance region of electron autoionization. Journal of Physics B: Atomic, Molecular and Optical Physics. 1994;27(10):1981-1992
Observation of vibrational excitation in photoelectron spectroscopy of HI+2[Pi]
No full textBöwering N, Klausing H-W, Müller M, Salzmann M, Heinzmann U. Observation of vibrational excitation in photoelectron spectroscopy of HI+2[Pi]. Chemical Physics Letters. 1992;189(4-5):467-472
Influence of autoionisation and predissociation on the photoelectron parameters in HBr
No full textLefebvre-Brion H, Salzmann M, Klausing H-W, Müller M, Böwering N, Heinzmann U. Influence of autoionisation and predissociation on the photoelectron parameters in HBr. Journal of Physics B: Atomic, Molecular and Optical Physics. 1989;22(23):3891-3900
Ad Panegyrin Academicam Solenni Trivm SS. Theologiae Licentiatorvm Renvntiationi Sacram D. XXVI. Avgvsti A. MD CC XXXIX. More Institvtoqve Maiorvm Celebrandam Ordinis Theologici Favtores Omnes Qva Par Est Observantia Et Hvmanitate [P. P. Lipsiae Dom. XII. p. Trin. A. R. S. M D CC XXIX.]
No full textInvitat Henricvs Klausing S. TH. D. Et Professor Pvblicvs Ordin. H. T. ProcancellarivsAutopsie nach Ex. der ULB Sachsen-AnhaltVorlageform des Erscheinungsvermerks: Ex Officina Langenhemiana
Eclipsis lunaris nuper visa et observata Wittenbergae anno MDCCXVIII.die IX.Septembr : in qua singularia ejusdem eclipseos notantur solidisque fundamentis superstruuntur
No full text[Enthält u.a.: ]adduntur & schemata necessaria, quantum licuit, nitide elaborataauctore Henrico Klausing ..
Bewegungskompensation für flugzeuggetragene SAR-Systeme
No full textDas Buchkapitel "Bewegungskompensation für flugzeuggetragene SAR-Systeme" befasst sich mit Phasenfehlern deterministischer und statistischer Natur, der Erfassung von Bewegungsfehlern und deren Kompensation bei der SAR-Bildprozessierung. Ideale Flugbedingungen, also die Annahme, die Plattform bewege sich mit konstanter Geschwindigkeit entlang der idealen Trajektorie, können bei flugzeuggetragenen SAR-Systemen nicht implizit vorausgesetzt werden. Es müssen eine variable Vorwärtsgeschwindigkeit, eine variable Flughöhe, seitliche Abweichungen von der nominellen Flugbahn und ein unerwünschtes Schwenken der Radarantenne in Betracht gezogen werden. Folge dieser Abweichungen von der nominellen Position und Lage sind eine veränderte Phasenhistorie, Laufzeitschwankungen sowie eine Amplitudenmodulation des Rückstreusignals. Als Folge stellen sich im SAR-Bild geometrische Verzerrungen, eine Verringerung der räumlichen Auflösung in Azimutrichtung und eine Verminderung des Bildkontrastes ein. Bei der Kompensation dieser Bewegungsfehler wird die Position der Plattform bestimmt, in Korrekturparameter umgesetzt und bei der Bildprozessierung zur Fehlerkorrektur berücksichtigt
Vibrationally resolved photoelectron-spin-polarization spectroscopy of HI molecules
No full textBöwering N, Salzmann M, Müller M, Klausing H-W, Heinzmann U. Vibrationally resolved photoelectron-spin-polarization spectroscopy of HI molecules. Physical Review, A: Atomic, Molecular and Optical Physics. 1992;45(1):R11-R14
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Photoelectron spin polarization approaching unity: photoionization of TI
No full textBöwering N, Salzmann M, Müller M, Klausing H-W, Heinzmann U. Photoelectron spin polarization approaching unity: photoionization of TI. Physica Scripta. 1990;41(4):429-432.It is shown that a complete photoelectron-spin polarization occurs independent of emission angle for two special sets of values of the dynamical photoionization parameters. In spin- and angle-resolved photoelectron spectroscopy of thallium the dynamical parameters were measured near the autoionization resonances at 149 nm and 82 nm. A pronounced angular variation of the polarization component A[Theta] was observed at 83 nm. For both resonances the parameters were found to approach different limiting values such that the length of the spin-polarization vector assumes values close to unity at all emission angles. The implications of these results for the corresponding dipole transition matrix elements are discussed
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
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