TY - JOUR A1 - Edel, Karl-Otto A1 - Hintze, Hartmut A1 - Korn, Monika T1 - Analysis of a solid railway wheel breakage JF - In: Rail international Vol. 23 (1992) 1, pp 28-40 Y1 - 1992 SN - 0020-8442 SP - 28 EP - 40 ER - TY - JOUR A1 - Edel, Karl-Otto A1 - Schaper, M. T1 - Fracture mechanics fatigue resistance analysis of the crack-damaged tread of overbraked solid railway vehicles JF - In: Rail international Vol. 23 (1992) 11, pp 35-49 Y1 - 1992 SN - 0020-8442 SP - 35 EP - 49 ER - TY - CHAP A1 - Wikarski, Dietmar T1 - Locally Markovian object nets - the conceptual model T2 - In: Workshop Concurrency, Specification & Programming : November 19 - 21, 1992 / [Humboldt-Universität Berlin. Hrsg.: Dekan des Fachbereichs Informatik]. - Berlin : Dekan des Fachbereichs Informatik, 1992. - (Informatik-Preprint ; 22) Y1 - 1992 SP - 182 EP - 189 ER - TY - JOUR A1 - Brasche, Ulrich T1 - Innovationsschub durch die Mikrosystemtechnik : Herausforderung für den Mittelstand JF - In: Elektronik (1992) H. 19 Y1 - 1992 SP - 112 ff ER - TY - GEN A1 - Brasche, Ulrich A1 - Eschenbach, R. A1 - Scholz, A. T1 - Visionen einer Technologiepolitik für das Land Schleswig-Holstein : Gutachten im Auftrag der Staatskanzlei Y1 - 1992 CY - Kiel ER - TY - GEN A1 - Brasche, Ulrich A1 - Widdig, H. T1 - Regionale Potentiale der Mikrosystemtechnik Y1 - 1992 CY - Berlin ER - TY - JOUR A1 - Stumpf, H. A1 - Pfister, Winfried T1 - Yang-mills dynamics as an effective theory of composite vector bosons JF - Il nuovo cimento Y1 - 1992 U6 - https://doi.org/10.1007/BF02730773 SN - 1826-9869 (online) SN - 0369-3546 (print) VL - 105 IS - 5 SP - 677 EP - 694 ER - TY - CHAP A1 - Heiner, M. A1 - Ventre, G. A1 - Wikarski, Dietmar T1 - A Petri Net based Tool Kit to integrate qualitative and quantitative analysis T2 - In: Transputer applications and systems '93 : proceedings of the 1993 World Transputer Congress, 20 - 22 September 1993, Aachen, Germany / ed. by R. Grebe ... [TTC, the Transputer Consortium] . - ( Transputer and occam engineering series ; 36 ). - ISBN 90-5199-140-1 Y1 - 1993 SP - 1317 ER - TY - JOUR A1 - Beck, Eberhard A1 - Russo, P. A1 - Papa, V. A1 - Jäger, W. A1 - Pezzino, V. A1 - Wildt, L. A1 - Vigneri, R. A1 - Lang, N. T1 - Nachweis von Insulin-Rezeptoren (IR) in Ovarialkarzinomgewebe JF - In: Archives of Gynecology and Obstetrics December 254(1993)Iss. 1-4, 1053-1054 Y1 - 1993 SN - 0932-0067 SP - 1053 EP - 1054 ER - TY - CHAP A1 - Bittl, A. A1 - Beck, Eberhard A1 - Jäger, W. A1 - Wildt, L. T1 - Untersuchungen zur Amenorrhoe unter adjuvanter CMF-Chemotherapie bei Mammakarzinom-Patientinnen T2 - In: Zytostatikabedingte Nebenwirkungen : Symposium in Pommersfelden, 3. - 4. Juli 1992; 26 Tabellen / Bd.-Hrsg.: N. Lang; W. Jäger. - München [u.a.] : Zuckschwerdt, 1992. - (Aktuelle Onkologie ; 68). - ISBN: 3-88603-458-5 Y1 - 1993 SP - 10 EP - 14 ER - TY - JOUR A1 - Hövel, H. A1 - Fritz, S. A1 - Hilger, A. A1 - Kreibig, U. A1 - Vollmer, Michael T1 - Width of cluster plasmon resonances: Bulk dielectric functions and chemical interface damping JF - In: Phys. Rev. B 48 (1993) 24, 18178–18188 N2 - The damping of collective electron resonances in clusters which develop into plasmon polaritons at larger sizes is investigated for free, supported, and embedded neutral metal clusters. Embedding of free 2 nm Ag clusters of 2-nm diameter into a SiO2 matrix leads to an increase of the width of the resonances by more than a factor of 3. The optical spectra are compared with the Mie theory using size-effect-modified dielectric functions of the solid state. The results corroborate the assumption that the widths of the resonances strongly depend on chemical interface effects. The results are briefly discussed with regard to limited-mean-free-path and quantum-size-effect theories and a recent approach by Persson. It is demonstrated that the widths of the spectra of supported and embedded clusters have to be interpreted with care since true intrinsic size effects of the clusters appear to be less effective than previously believed and can be obscured by the chemical interface damping. © 1993 The American Physical Society Y1 - 1993 U6 - https://doi.org/10.1103/PhysRevB.48.18178 ER - TY - JOUR A1 - Götz, T. A1 - Träger, F. A1 - Vollmer, Michael T1 - Desorption of metal atoms with laser light of different polarization JF - In: Applied physics / A 57 (1993) 1, pp 101-104 N2 - Laser-induced desorption of metal atoms from the surface of small metal particles has been investigated as a function of the shape of the particles and the polarization of the incident laser light. The particles were supported on LiF, quartz or sapphire substrates. In a first set of experiments, the shape of the particles was determined by recording optical transmission spectra with s- and p-polarized light incident under an angle of typically 40° with respect to the surface normal. The metal particles turn out to be oblate, the ratio of the axes perpendicular and parallel to the substrate surface being on the order of 0.5. This ratio decreases with increasing particle size. Also, the particles change shape if the temperature is raised. In further experiments, s- and p-polarized light has been used to stimulate desorption of atoms via surface plasmon excitation. It is found that the desorption rate markedly depends on the polarization of the light. This is explained by excitation of the collective electron oscillation along different axes of the non-spherical particles. Y1 - 1993 U6 - https://doi.org/10.1007/BF00331225 SP - 101 EP - 104 ER - TY - JOUR A1 - Hoheisel, W. A1 - Vollmer, Michael A1 - Träger, F. T1 - Desorption of metal atoms with laser light: Mechanistic studies JF - In: Physical Review / B 48 1993) 23, 17463-17476 N2 - Results on laser-induced desorption of metal atoms from small metal particles are presented. Experiments have been performed on sodium, potassium, and silver particles supported on a LiF(100) single-crystal surface under ultrahigh vacuum conditions. Measurements include the determination of the desorption rate as a function of laser wavelength, laser intensity, average particle size, and substrate temperature, the determination of the kinetic energy of the desorbed atoms, the investigation of the optical spectra of the supported metal particles, and the study of the influence of adsorbate molecules on the desorption rate. Furthermore, theoretical extinction and absorption spectra of the metal particles have been calculated with the classical electrodynamical Mie theory as a function of average particle size and excitation wavelength. Also, the radial electric field at the particle surface was computed. The results of the experiments and theoretical calculations are combined to give a consistent picture of the mechanism of metal-atom desorption by electronic excitation with laser light. A realistic surface potential from which the atoms escape and nonlocal optical effects are taken into account. The latter introduce additional absorption channels by the formation of electron-hole pairs in the surface layer of the particle which relax into antibonding states before desorption occurs. Finally, the mechanism is discussed in the light of similar phenomena observed for thin metal films. Possibilities for future work are outlined. © 1993 The American Physical Society Y1 - 1993 U6 - https://doi.org/10.1103/PhysRevB.48.17463 ER - TY - JOUR A1 - Götz, T. A1 - Hoheisel, W. A1 - Träger, F. A1 - Vollmer, Michael T1 - Interplay between collective and single electron excitations in large metal clusters JF - In: Zeitschrift für Physik / D 26 (1993), 267-269 Y1 - 1993 ER - TY - JOUR A1 - Hoheisel, W. A1 - Vollmer, Michael A1 - Träger, F. T1 - Laserdesorption von Metallatomen JF - In: Physikalische Blätter 49 (1993) 9, 795 - 799 N2 - Beleuchtet man die Oberfläche eines Festkörpers mit Laserlicht, können darauf adsorbierte Atome oder Moleküle abgelöst werden. Solche Desorptionsprozesse sind in jüngster Zeit in zahlreichen Experimenten untersucht worden, wobei sich das Interesse sowohl auf die Erforschung der zugrundeliegenden Mechanismen als auch auf mögliche Anwendungen dieser Reaktionen, zum Beispiel zur gezielten Modifizierung von Oberflächen, konzentriert. Besonders interessant ist das laserinduzierte Aufbrechen von Bindungen zur Oberfläche dann, wenn es nicht einfach als thermischer Prozeß durch eine Temperaturerhöhung hervorgerufen wird, sondern direkt auf einer elektronischen Anregung beruht. Solche nichtthermischen Prozesse werden selbst für Metalle beobachtet, obwohl die Kopplung der elektronischen Anregung an das Substrat hier besonders schnell abläuft. Der zugrundeliegende Mechanismus beruht auf dem Zusammenspiel einer kollektiven Elektronenoszillation und einer lokalisierten Einzelelektronenanregung, wobei auch nichtlokale optische Effekte in der Metalloberfläche eine wichtige Rolle spielen. Y1 - 1993 U6 - https://doi.org/10.1002/phbl.19930490909 ER - TY - CHAP A1 - Edel, Karl-Otto T1 - Fracture Mechanics Analysis of the Residual Service Life of the Welded Main Girders of the Highway Bridges of Ruedersdorf T2 - In: Fatigue design : papers presented at the International Symposium on Fatigue Design / organized and sponsored by VTT (Technical Research Centre of Finland) and held in Helsinki, Finland. Co-sponsored by the European Structural Integrity Society (ESIS) and the Technology Development Centre of Finland (TEKES). Ed. by J Solin ... - London : Mechanical Engineering Publ., 1993. - (ESIS publication // European Structural Integrity Society, ISSN 1566-1369 ; 16). - ISBN 0-85298-884-2 Y1 - 1993 SP - 109 EP - 120 ER - TY - JOUR A1 - Herrman, K. H. A1 - Auth, J. A1 - Möllmann, Klaus Peter A1 - Tomm, J. W. A1 - Bottner, H. A1 - Lambrecht, A. A1 - Tacke, M. A1 - Kolesnikov, V. A1 - Yunovich, A. E. A1 - Fedorenko, A. I. A1 - Mironov, O. A. A1 - Sipatov, A. Yu T1 - Band offsets in Eu-containing lead chalcogenides and lead chalcogenide superlattices from spectroscopic data JF - In: Semiconductor Science and Technology Vol. 8 (1993) 1S, pp S176-S179 N2 - The results of an experimental study of the optical and photoelectrical properties of Eu-containing lead chalcogenides and superlattices are presented. From both sets of experiments band offset data for the lead chalcogenide-europium chalcogenide heterojunction are derived. The results are compared with the data obtained from a linear interpolation of the band structures between those of the binaries. Y1 - 1993 U6 - https://doi.org/10.1088/0268-1242/8/1S/040 SN - 1361-6641 SP - S176 EP - S179 ER - TY - CHAP A1 - Edel, Karl-Otto T1 - Mit Rissen leben? : Zur Betriebssicherheit rissgeschädigter Bauteile; ein Vortrag, gehalten am 14. April 1993 in der FH Brandenburg T3 - Hochschulreihe / FH Brandenburg - 93,1 KW - Bauwerk KW - Riss KW - Betriebssicherheit Y1 - 1993 PB - Fachhochsch. Presse- und Öffentlichtkeitsarbeit CY - Brandenburg ER - TY - JOUR A1 - Edel, Karl-Otto T1 - Bruchmechanische Analyse und Bewertung der Rißausbreitung im Radkranz von Eisenbahnvollrädern. Teil 1 JF - In: Zeitschrift für Eisenbahnwesen und Verkehrstechnik : ZEV + DET 117 (1993) 8, 262-268 Y1 - 1993 SN - 0373-322X - 0941-0589 SP - 262 EP - 268 ER - TY - JOUR A1 - Edel, Karl-Otto T1 - Bruchmechanische Analyse und Bewertung der Rißausbreitung im Radkranz von Eisenbahnvollrädern. Teil 2 JF - In: Zeitschrift für Eisenbahnwesen und Verkehrstechnik : ZEV + DET 117 (1993) 9, 308-315 Y1 - 1993 SN - 0373-322X - 0941-0589 SP - 308 EP - 315 ER -