Bubbling in delay-coupled lasers (2009)
Flunkert, V., D'Huys, O., Danckaert, J., Fischer, I., Schoell, E.
We study chaos synchronization of two lasers which are delay-coupled via an active or a passive relay. While the lasers are synchronized, their dynamics is identical to a single laser with delayed...
Erpenbeck, V.J., Fischer, I., Wiese, K., Schaumann, F., Schmiedl, A., Nassenstein, C., ...
Background: There is increasing interest in testing surfactant preparations for asthma therapy. Previously, Curosurf was demonstrated to increase inflammation in allergic asthmatics. So far, little...
SP-D modulates uptake of allergen particles by pulmonary macrophages and dendritic cells (2009)
Winkler, C., Rochlitzer, S., Wedekind, A., Fischer, I., Braun, A., Mueller, M., ...
Amplitude-phase dynamics near the locking region of two delay-coupled semiconductor lasers (2008)
Erzgraber, H, Wille, E, Krauskopf, B, Fischer, I
We investigate the dynamical properties of two mutually delay-coupled semiconductor lasers that are coupled via their optical fields. Because a semiconductor laser is an oscillator that features...
H. Erzgräber A, D. Lenstra A, B. Krauskopf B, E. Wille, M. Peil, ...
We study the spectral and dynamical behavior of two identical, mutually delaycoupled semiconductor lasers. We concentrate on the short coupling-time regime where the number of basic states of the...
Femtosecond Dynamics of Isolated Phenylcarbenes (2008)
Noller, B., Poisson, L., Maksimenka, R., Fischer, I.
Understanding the primary photophysical processes in molecules is essential for interpreting their photochemistry, because molecules rarely react from the initially excited electronic state. In this...
Femtosecond Dynamics of Isolated Phenylcarbenes (2008)
Noller, B., Poisson, L., Maksimenka, R., Fischer, I.
Understanding the primary photophysical processes in molecules is essential for interpreting their photochemistry, because molecules rarely react from the initially excited electronic state. In this...
Stabilization of Feedback-Induced Instabilities in Semiconductor Lasers (2007)
T. Heil, I. Fischer, W. Elsäßer
We present extensive studies on feedback-induced instabilities in semiconductor lasers (SLs) subject to delayed optical feedback. We demonstrate that a sufficient reduction of the linewidth...
Statistical Studies of Semiconductor Lasers With Delayed Optical Feedback (2007)
D.W. Sukow, T. Heil, I. Fischer, A. Gavrielides, A. Hohl, W. Elsäßer
We investigate the statistics of the irregular fast pulsing intensity dynamics of semiconductor lasers with delayed optical feedback operating in the low-frequency fluctuation and coherence collapse...
Spatio-temporal Dynamics of Broad Area Semiconductor Lasers and its Characterization (2007)
T. Burkhard, M. O. Ziegler, I. Fischer, W. Elsäßer
We present experiments giving evidence for the onset of irregular spatio-- temporal dynamics on picosecond timescales in broad area lasers and characterize the dynamical complexity. In particular, we...
I. Fischer, T. Heil, M. Münkel, W. Elsäßer
The origin of Low Frequency Fluctuations (LFF), occurring for semiconductor lasers with delayed optical feedback from an external mirror, has been intensively discussed within the last ten years. One...
Spatio-Temporal Dynamics in the Near Field of a 980nm Ridge Waveguide Pump Laser Diode (2007)
M. O. Ziegler, E. Miltényi, M. Münkel, J. Greif, G. Jennemann, I. Fischer, ...
The dynamic behavior of the light output from aluminum-free 980nm ridge waveguide GaInAs/GaInAsP/GaInP pump lasers is studied in the high power regime on a picosecond time scale. Three types of the...
T. Heil, I. Fischer, W. Elsäßer
We present a systematic investigation of the dynamical behavior of semiconductor lasers subject to external optical feedback in dependence on the injection current and the optical feedback strength....
Visualization of neural networks using Java applets (2007)
During the last decade, artificial neural networks (ANNs) have reached maturity and established themselves as a useful tool for information processing, especially for complex data, where prior...
Consequences of cytomegalovirus reactivation in patients with severe sepsis (2007)
Heininger, A, Hamprecht, K, Fischer, I, Baumeister, A, Meisner, C, Häberle, H
No abstract available.
Crystalline phases in chiral ferromagnets: Destabilization of helical order (2007)
Fischer, I., Shah, N., Rosch, A.
In chiral ferromagnets, weak spin-orbit interactions twist the ferromagnetic order into spirals, leading to helical order. We investigate an extended Ginzburg-Landau theory of such systems where the...
Spatially Resolved Femtosecond Pump-Probe Spectroscopy in Broad-Area Semiconductor Lasers (2006)
Kaiser, J, Fischer, I, Elsasser, W, Gehrig, E, Hess, O
We investigate the ultrafast gain dynamics in broad-area semiconductor lasers with particular emphasis on spatial and spatiotemporal effects. We present a spatially resolved femtosecond pump-probe...
Schleich, J., Angerer, G., Fischer, I., Nathani, C., Schön, M., Seydel, P., ...
Die Abbildung des technologischen Wandels ist in den vorherrschenden umwelt-ökonomischen Modellen nicht adäquat. Technologischer Fortschritt ist in der Regel exogen, so dass Politiken ohne Einfluss...
Synchronization of delay-coupled oscillators: A study of semiconductor lasers (2005)
Bauer, S., Kreissl, J., Ushakov, O., Korneyev, N., Henneberger, F., ...
Two delay-coupled semiconductor lasers are studied in the regime where the coupling delay is comparable to the time scales of the internal laser oscillations. Detuning the optical frequency between...
Field-tuned quantum critical point of antiferromagnetic metals (2004)
A magnetic field applied to a three-dimensional antiferromagnetic metal can destroy the long-range order and thereby induce a quantum critical point. Such field-induced quantum critical behavior is...
In metallic magnets like MnSi the interplay of two very weak spin-orbit coupling effects can strongly modify the Fermi surface. In the absence of inversion symmetry even a very small...
Mode-Locking in Broad-Area Semiconductor Lasers Enhanced by Picosecond-Pulse Injection (2004)
Kaiser, J, Fischer, I, Elsasser, W, Gehrig, E, Hess, O
We present combined experimental and theoretical investigations of the picosecond emission dynamics of broad-area semiconductor lasers (BALs). We enhance the weak longitudinal self-mode-locking that...
Fischer,I., Hollik,W., Roth,M., Stoeckinger,D.
Supersymmetric Slavnov-Taylor and Ward identities are investigated in presence of soft and spontaneous symmetry breaking. We consider an abelian model where soft supersymmetry breaking yields a mass...
Design of a High Temperature Test Device for Bidriectional Loading for CMC Samples (2004)
Fischer, I., Reimer, T., Weihs, H.
Since the component mass in space applications is very critical and new developments from CMC materials are on the rise with a high degree of complexity, the exact, detailed analysis of these...
Fischer, I., Hollik, W., Roth, M., Stoeckinger, D.
Supersymmetric Slavnov-Taylor and Ward identities are investigated in presence of soft and spontaneous symmetry breaking. We consider an abelian model where soft supersymmetry breaking yields a mass...
Mutually delay-coupled semiconductor lasers: mode bifurcation scenarios (2004)
Erzgraber, H, Lenstra, D, Krauskopf, B, Wille, E, Peil, M, Fischer, I, ...
Preprint submitted to Elsevier Science
Dynamical properties of mutually delayed coupled semiconductor lasers (2004)
Erzgraber, H, Lenstra, D, Krauskopf, B, Fischer, I
We theoretically investigate the dynamical properties of a system of two semiconductor lasers (SLs) that are mutually coupled via their optical fields. An intrinsic feature of the coupling is its...
ParSeq: searching motifs with structural and biochemical properties (2004)
M. Schmollinger, I. Fischer, C. Nerz, S. Pinkenburg, F. Götz, M. Kaufmann, ...
Summary: Searches for variable motifs such as proteinbinding sites or promoter regions are more complex than the search for casual motifs. For example, in amino acid sequences comparing motifs alone...
ParSeq: searching motifs with structural and biochemical properties (2004)
Schmollinger, M., Fischer, I., Nerz, C., Pinkenburg, S., Götz, F., Kaufmann, M., ...
Summary: Searches for variable motifs, like protein binding sites or promotor regions are more complex than the search for casual motifs, e. g. on amino acid sequences comparing motifs alone mostly...
ParSeq: searching motifs with structural and biochemical properties (2004)
Schmollinger, M., Fischer, I., Nerz, C., Pinkenburg, S., Götz, F., Kaufmann, M., ...
Summary: Searches for variable motifs such as protein-binding sites or promoter regions are more complex than the search for casual motifs. For example, in amino acid sequences comparing motifs alone...
ParSeq: searching motifs with structural and biochemical properties (2004)
Schmollinger, M., Fischer, I., Nerz, C., Pinkenburg, S., Götz, F., Kaufmann, M., ...
Summary: Searches for variable motifs, like protein binding sites or promotor regions are more complex than the search for casual motifs, e. g. on amino acid sequences comparing motifs alone mostly...
Fischer, I., Hollik, W., Roth, M., Stöckinger, D.
Supersymmetric Slavnov-Taylor and Ward identities are investigated in presence of soft and spontaneous symmetry breaking. We consider an abelian model where soft supersymmetry breaking yields a mass...
Thermomechanical qualification tests of complex CMC re-entry structures (2003)
Ortelt, M., Weihs, H., Fischer, I., Dogigli, M.
In the last years a lot of international effort has been invested in high temperature resistant ceramic structures. Especially the outer thermal protection system (TPS) of the X-38 re-entry vehicle...
Heil, T, Fischer, I, Elsasser, W, Krauskopf, B, Green, K, Gavrielides, A
Later published by American Physical Society, (2003) Physical Review E, 67 (6) article no. 066214. ISSN 1063-651X.
Mädchen + Technik Praktikum 2001 (2002)
Leuchtenberger, D., Fischer, I., Eitschberger, M.
Vom 3.9.01 bis 7.9.01 fand in Erlangen zum dritten Mal das Mädchen + Technik Praktikum in Kooperation des Fraunhofer-Institutes für Integrierte Schaltungen (Bereich Angewandte Elektronik, IIS-A)...
Gilbert, Thomas, Fischer, I., Chen, Peter
Author Institution: Department of Chemistry, Laboratorium fuer Organische Chemie
THE ZEKE SPECTRA OF $C_{3}H_{3}$ AND $C_{3}H_{5}$ (2000)
Gilbert, Thomas, Fischer, I., Chen, Peter
Author Institution: Laboratorium f. Organische Chemie ETH Zurich
Eitschberger, M., Enzelberger, S., Steuss, K., Roth, M., Frank, C., Fischer, I.
Vom 4.9.00 bis 8.9.00 fand in Erlangen zum zweiten Mal ein Mädchen und Technikpraktikum in Kooperation des Frauenhofer-Institutes für Integrierte Schaltungen (Bereich Angewandte Elektronik, IIS-A)...
C. Degen, B. Krauskopf, G. Jennemann, I. Fischer, W. Elsäßer
. We study symmetries in multi-transverse-mode near-fields of circular vertical cavity surface emitting lasers (VCSELs). The 0 # polarized component of the near-field always has circular or...
High Temperature Test of a Hinge Joint Attachment of a CMC Control Flap (1999)
Weihs, H., Hald, H., Rühle, F., Fischer, I., Reimer, T., Handrick, K., ...
C. Degen, I. Fischer, W. Elsäßer
We present experimental studies on the transverse mode emission behaviour of oxide-confined Vertical Cavity Surface Emitting Lasers (VCSELs). VCSELs with aperture diameters of 6m and 11m exhibit a...
Spatio-temporal Dynamics of Broad Area Semiconductor Lasers and its Characterization (1999)
T. Burkhard, M. O. Ziegler, I. Fischer, W. Elsäßer
We present experiments giving evidence for the onset of irregular spatio-temporal dynamics on picosecond timescales in broad area lasers and characterize the dynamical complexity. In particular, we...
Estimation of Delay Times From a Delayed Optical Feedback Laser Experiment (1998)
M.J. Bünner, A. Kittel, J. Parisi, I. Fischer, W. Elsäßer
. -- We estimate delay times from high-dimensional chaotic time series experimentally obtained from a fast optical time-delayed feedback system. The experiment consists of a semiconductor laser,...
Proving Properties of Neural Networks with Graph Transformations (1998)
I. Fischer, M. Koch, M. R. Berthold
Graph transformations offer a unifying framework to formalize Neural Networks together with their corresponding training algorithms. It is straightforward to describe also topology changing training...
Complex Spatio-Temporal Dynamics in the Near-Field of a Broad-Area Semiconductor Laser (1996)
I. Fischer, O. Hess, W. Elsäßer, E. Göbel, Te Physik
. -- We present the combination of microscopic model calculations and direct experimental evidence for complex spatio-temporal dynamics on a picosecond timescale in the nearfield of a broad-area...
I. Fischer, A. M. Levine, W. Elsäßer, E. Göbel, D. Lenstra
We report the first experimental observation of irregular picosecond light pulses within the coherence collapse of a semiconductor laser subject to delayed moderate optical feedback. This pulsing...
Complex Spatio-Temporal Dynamics in the Near-Field of a Broad Area Semiconductor Laser (1996)
I. Fischer, O. Hess, W. Elsäßer, E. Göbel
We present the combination of microscopic model calculations and direct experimental evidence for complex spatio-temporal dynamics on a picosecond timescale in the near-field of a broad area...
High-Dimensional Chaotic Dynamics of an External Cavity Semiconductor Laser (1994)
I. Fischer, O. Hess, W. Elsäßer, E. Göbel, Fachbereich Physik
We report experimental realization of high--dimensional chaos in a semiconductor laser with delayed feedback from a T--shaped cavity. We study the transition phenomena from regular to...
THE SIMPLEST HETERONUCLEAR METAL CLUSTER: LiBe-DIMER (1990)
Pak, K., Schlachta, R., Fischer, I., Rosmus, P., Bondybey, V. E.
Author Institution: Laser Spectroscopy Facility, Department of Chemistry, The Ohio State University; Institut f\""{u}r Physikalische und Theoretische Chemie der Technischen, Universit\""{a}t Munchen;...
Neuronal abnormalities in microtubule-associated protein 1B mutant mice.
Edelmann, W, Zervas, M, Costello, P, Roback, L, Fischer, I, Hammarback, J A, ...
Microtubules play an important role in establishing cellular architecture. Neuronal microtubules are considered to have a role in dendrite and axon formation. Different portions of the developing and...
Khalameyzer, V., Fischer, I., Bornscheuer, U. T., Altenbuchner, J.
A genomic library of Pseudomonas fluorescens DSM 50106 in a λRESIII phage vector was screened in Escherichia coli K-12 for esterase activity by using α-naphthyl acetate and Fast Blue RR. A 3.2-kb...
Dupon, M, Cazenave, J, Pellegrin, J L, Ragnaud, J M, Cheyrou, A, Fischer, I, ...
To investigate whether both tissue culture and PCR on a sequence from the repetitive rDNA could contribute to the diagnosis of toxoplasmosis, blood samples and, if they were available, cerebrospinal...
Skriner, K, Sommergruber, W H, Tremmel, V, Fischer, I, Barta, A, Smolen, J S, ...
The recently described anti-A2/RA33 autoantibodies occur in 20-40% of patients with RA, SLE, and mixed connective tissue disease (MCTD). They are directed to the A2 protein of the heterogeneous...
Radon exposures in a Jerusalem public school.
Richter, E D, Neeman, E, Fischer, I, Berdugo, M, Westin, J B, Kleinstern, J, ...
In December 1995, ambient radon levels exceeding 10,000 Bq/m3 were measured in a basement shelter workroom of a multilevel East Talpiot, Jerusalem, public elementary school (six grades, 600...
Neuronal abnormalities in microtubule-associated protein 1B mutant mice.
Edelmann, W, Zervas, M, Costello, P, Roback, L, Fischer, I, Hammarback, J A, ...
Microtubules play an important role in establishing cellular architecture. Neuronal microtubules are considered to have a role in dendrite and axon formation. Different portions of the developing and...
Khalameyzer, V., Fischer, I., Bornscheuer, U. T., Altenbuchner, J.
A genomic library of Pseudomonas fluorescens DSM 50106 in a λRESIII phage vector was screened in Escherichia coli K-12 for esterase activity by using α-naphthyl acetate and Fast Blue RR. A 3.2-kb...
Dupon, M, Cazenave, J, Pellegrin, J L, Ragnaud, J M, Cheyrou, A, Fischer, I, ...
To investigate whether both tissue culture and PCR on a sequence from the repetitive rDNA could contribute to the diagnosis of toxoplasmosis, blood samples and, if they were available, cerebrospinal...
Skriner, K, Sommergruber, W H, Tremmel, V, Fischer, I, Barta, A, Smolen, J S, ...
The recently described anti-A2/RA33 autoantibodies occur in 20-40% of patients with RA, SLE, and mixed connective tissue disease (MCTD). They are directed to the A2 protein of the heterogeneous...
Radon exposures in a Jerusalem public school.
Richter, E D, Neeman, E, Fischer, I, Berdugo, M, Westin, J B, Kleinstern, J, ...
In December 1995, ambient radon levels exceeding 10,000 Bq/m3 were measured in a basement shelter workroom of a multilevel East Talpiot, Jerusalem, public elementary school (six grades, 600...
Showing the Equivalence of two Training Algorithms - Part I
M. Koch, I. Fischer, M. R. Berthold
In previous work Graph Transformations have been shown to offer a powerful way to formally specify Neural Networks and their corresponding training algorithms. It has also been shown how to use this...