T. Bartsch

Gluing torus families across a singularity: The lens space for the hydrogen atom in crossed fields (2007)

Bartsch, T., Gekle, S., Main, J., Uzer, T.

This is a pre-print.

Animal models of migraine: looking at the component parts of a complex disorder (2006)

Bergerot, A, Holland, PR, Akerman, S, Bartsch, T, Ahn, AH, MaassenVanDenBrink, A, ...

Animal models of human disease have been extremely helpful both in advancing the understanding of brain disorders and in developing new therapeutic approaches. Models for studying headache...

Extracting Multidimensional Phase Space Topology from Periodic Orbits (2006)

Gekle, S., Main, J., Bartsch, T., Uzer, T.

We establish a hierarchical ordering of periodic orbits in a strongly coupled multidimensional Hamiltonian system. Phase space structures can be reconstructed quantitatively from the knowledge of...

Selective affection of hippocampal CA-1 neurons in patients with transient global amnesia without long-term sequelae (2006)

Bartsch, T., Alfke, K., Stingele, R., Rohr, A., Freitag-Wolf, S., Jansen, O., ...

The aetiology, pathomechanisms and anatomical correlates of transient global amnesia (TGA) still remain obscure. Recently, focal MR-signal diffusion-weighted imaging (DWI) changes in the hippocampus...

Selective affection of hippocampal CA-1 neurons in patients with transient global amnesia without long-term sequelae (2006)

Bartsch, T., Alfke, K., Stingele, R., Rohr, A., Freitag-Wolf, S., Jansen, O., ...

The aetiology, pathomechanisms and anatomical correlates of transient global amnesia (TGA) still remain obscure. Recently, focal MR-signal diffusion-weighted imaging (DWI) changes in the hippocampus...

Verfahren und Vorrichtung zur zerstoerungsfreien Pruefung oder zur Erfassung von Messdaten von scheibenfoermigen oder ringfoermigen Prueflingen (2005)

Bartsch, T., Montnacher, J., Walte, F., Pohl, D., Kloos, R., Wegener, A., ...

WO2003010532 A UPAB: 20030501 NOVELTY - The method involves placing the object (11) on two separate mounting rollers (33,34) rotatably mounted on bearings and holding the object in a test position by...

Neue Prüfsysteme für die Eisenbahnradprüfung und Radsatzwellenprüfung (2005)

Rockstroh, B., Kappes, W., Walte, F., Bessert, S., Kröning, M., Montnacher, J., ...

Seit mehr als 5 Jahren haben sich Radsatzprüfanlagen vom Typ AURA im harten Prüfbetrieb in den Instandhaltungswerken der Deutschen Bahn AG bewährt. Die Unterflurprüfeinrichtungen, UFPE, sind seit...

Semiclassical ionization dynamics of the hydrogen molecular ion in an electric field of arbitrary orientation (2004)

Bartsch, T., Uzer, T.

Quasi-static models of barrier suppression have played a major role in our understanding of the ionization of atoms and molecules in strong laser fields. Despite their success, in the case of...

Photoabsorption spectra of the diamagnetic hydrogen atom in the transition regime to chaos: Closed orbit theory with bifurcating orbits (2004)

Fabcic, T., Main, J., Bartsch, T., Wunner, G.

With increasing energy the diamagnetic hydrogen atom undergoes a transition from regular to chaotic classical dynamics, and the closed orbits pass through various cascades of bifurcations. Closed...

Central neuromodulation in chronic migraine patients with suboccipital stimulators: a PET study (2004)

Matharu, M.S., Bartsch, T., Ward, N., Frackowiak, R.S.J., Weiner, R., Goadsby, P.J.

Electrical stimulation of primary sensory afferents is known to have an antinociceptive effect. Animal and functional imaging studies suggest a role for supraspinal structures in this response. Eight...

Neue Prüfsysteme für die Eisenbahnradprüfung und Radsatzwellenprüfung (2004)

Kappes, W., Rockstroh, B., Walte, F., Bessert, S., Bähr, W., Montnacher, J., ...

Seit mehr als 5 Jahren haben sich Radsatzprüfanlagen vom Typ AURA im harten Prüfbetrieb in den Instandhaltungswerken der Deutschen Bahn AG bewährt. Die Unterflurprüfeinrichtungen, UFPE, sind seit...

Uniform semiclassical approximations on a topologically non-trivial configuration space: The hydrogen atom in an electric field (2003)

Bartsch, T., Main, J., Wunner, G.

Semiclassical periodic-orbit theory and closed-orbit theory represent a quantum spectrum as a superposition of contributions from individual classical orbits. Close to a bifurcation, these...

The Kustaanheimo-Stiefel transformation in geometric algebra (2003)

Bartsch, T.

The Kustaanheimo-Stiefel (KS) transformation maps the non-linear and singular equations of motion of the three-dimensional Kepler problem to the linear and regular equations of a four-dimensional...

Increased responses in trigeminocervical nociceptive neurons to cervical input after stimulation of the dura mater (2003)

Bartsch, T., Goadsby, P. J.

Pain referral and spread in headache patients may be attributed to a sensitization of central nociceptive neurons with an increased excitability to afferent input. We investigated if noxious dural...

Increased responses in trigeminocervical nociceptive neurons to cervical input after stimulation of the dura mater (2003)

Bartsch, T., Goadsby, P. J.

Pain referral and spread in headache patients may be attributed to a sensitization of central nociceptive neurons with an increased excitability to afferent input. We investigated if noxious dural...

Increased responses in trigeminocervical nociceptive neurons to cervical input after stimulation of the dura mater (2003)

Bartsch, T., Goadsby, P. J.

Pain referral and spread in headache patients may be attributed to a sensitization of central nociceptive neurons with an increased excitability to afferent input. We investigated if noxious dural...

The hydrogen atom in an electric field: Closed-orbit theory with bifurcating orbits (2002)

Bartsch, T., Main, J., Wunner, G.

Closed-orbit theory provides a general approach to the semiclassical description of photo-absorption spectra of arbitrary atoms in external fields, the simplest of which is the hydrogen atom in an...

Closed orbits and their bifurcations in the crossed-fields hydrogen atom (2002)

Bartsch, T., Main, J., Wunner, G.

A systematic study of closed classical orbits of the hydrogen atom in crossed electric and magnetic fields is presented. We develop a local bifurcation theory for closed orbits which is analogous to...

Semiclassical quantization of the hydrogen atom in crossed electric and magnetic fields (2002)

Bartsch, T., Main, J., Wunner, G.

The S-matrix theory formulation of closed-orbit theory recently proposed by Granger and Greene is extended to atoms in crossed electric and magnetic fields. We then present a semiclassical...

Semiclassical quantization with bifurcating orbits (2002)

Bartsch, T., Main, J., Wunner, G.

Bifurcations of classical orbits introduce divergences into semiclassical spectra which have to be smoothed with the help of uniform approximations. We develop a technique to extract individual...

P/Q-Type calcium-channel blockade in the periaqueductal gray facilitates trigeminal nociception: a functional genetic link for migraine? (2002)

Knight, Y.E., Bartsch, T., Kaube, H., Goadsby, P.J.

The discovery of mis-sense mutations in the alpha 1A subunit of the P/Q-type calcium channel in patients with familial hemiplegic migraine indicates the potential involvement of dysfunctional ion...

Dielectronic recombination (via N=2 -> N '=2 core excitations) and radiative recombination of Fe XX: Laboratory measurements and theoretical calculations (2002)

Savin,D. W., Behar,E., Kahn,S. M., Gwinner,G., Saghiri,A. A., Schmitt,M., ...

We have measured the resonance strengths and energies for dielectronic recombination (DR) of Fe XX forming Fe XIX via N = 2 --> N' = 2 (DeltaN = 0) core excitations. We have also calculated the DR...

Dielectronic recombination (via N = 2→N = 2 core excitations) and radiative recombination of Fe xx: Laboratory measurements and theoretical calculations (2002)

Savin, D.W., Behar, E., Kahn, S.M., Gwinner, G., Saghiri, A.A., Schmitt, M., ...

We have measured the resonance strengths and energies for dielectronic recombination (DR) of Fe XX forming Fe XIX via N = 2 → N′ = 2 (N = 0) core excitations. We have also calculated the DR...

Dielectronic recombination (via N = 2→N = 2 core excitations) and radiative recombination of Fe xx: Laboratory measurements and theoretical calculations (2002)

Savin, D.W., Behar, E., Kahn, S.M., Gwinner, G., Saghiri, A.A., Schmitt, M., ...

We have measured the resonance strengths and energies for dielectronic recombination (DR) of Fe XX forming Fe XIX via N = 2 → N′ = 2 (N = 0) core excitations. We have also calculated the DR...

Dielectronic recombination (via N = 2→N = 2 core excitations) and radiative recombination of Fe xx: Laboratory measurements and theoretical calculations (2002)

Savin, D.W., Behar, E., Kahn, S.M., Gwinner, G., Saghiri, A.A., Schmitt, M., ...

We have measured the resonance strengths and energies for dielectronic recombination (DR) of Fe XX forming Fe XIX via N = 2 → N′ = 2 (N = 0) core excitations. We have also calculated the DR...

Dielectronic Recombination of Fe XIX Forming Fe XVIII: Laboratory Measurements and Theoretical Calculations (2002)

Savin,Daniel W., Kahn,S.M., Linkemann,J., Saghiri,A.A., Schmitt,M., Grieser,M., ...

We have measured resonance strengths and energies for dielectronic recombination (DR) of Fe XIX forming Fe XVIII via N = 2 N = 2 and N = 2 N = 3 core excitations. All measurements were carried out...

Dielectronic recombination (via N=2 -> N '=2 core excitations) and radiative recombination of Fe XX: Laboratory measurements and theoretical calculations (2002)

Savin, D. W., Behar, E., Kahn, S. M., Gwinner, G., Saghiri, A. A., Schmitt, M., ...

We have measured the resonance strengths and energies for dielectronic recombination (DR) of Fe XX forming Fe XIX via N = 2 --> N' = 2 (DeltaN = 0) core excitations. We have also calculated the DR...

Dielectronic Recombination of Fe XIX Forming Fe XVIII: Laboratory Measurements and Theoretical Calculations (2002)

Savin, Daniel W., Kahn, S.M., Linkemann, J., Saghiri, A.A., Schmitt, M., Grieser, M., ...

We have measured resonance strengths and energies for dielectronic recombination (DR) of Fe XIX forming Fe XVIII via N = 2 N = 2 and N = 2 N = 3 core excitations. All measurements were carried out...

Dielectronic Recombination (via N=2 --> N'=2 Core Excitations) and Radiative Recombination of Fe XX: Laboratory Measurements and Theoretical Calculations (2001)

Savin, D. W., Behar, E., Kahn, S. M., Gwinner, G., Saghiri, A. A., Schmitt, M., ...

We have measured the resonance strengths and energies for dielectronic recombination (DR) of Fe XX forming Fe XIX via N=2 --> N'=2 (Delta_N=0) core excitations. We have also calculated the DR...

Semiclassical Quantization by Harmonic Inversion: Comparison of Algorithms (2001)

Bartsch, T., Main, J., Wunner, G.

Harmonic inversion techniques have been shown to be a powerful tool for the semiclassical quantization and analysis of quantum spectra of both classically integrable and chaotic dynamical systems....

Ghost orbit bifurcations in semiclassical spectra (2000)

Bartsch, T., Main, J., Wunner, G.

Gutzwiller's semiclassical trace formula for the density of states in a chaotic system diverges near bifurcations of periodic orbits, where it must be replaced with uniform approximations. It is well...

Radiative recombination of bare Bi83+: Experiment versus theory (2000)

Hoffknecht, A., Brandau, C., Bartsch, T., Boehme, C., Knopp, H., Schippers, S., ...

Electron-ion recombination of completely stripped Bi83+ was investigated at the Experimental Storage Ring (ESR) of the GSI in Darmstadt. It was the first experiment of this kind with a bare ion...

Dielectronic recombination of ground-state and metastable Li+ ions (1999)

Saghiri, A.A., Linkemann, J., Schmitt, M., Schwalm, D., Wolf, A., Bartsch, T., ...

Dielectronic recombination has been investigated for Δn=1 resonances of ground-state Li+(1s2) and for Δn=0 resonances of metastable Li+(1s2s 3S). The ground-state spectrum shows three prominent...

Dielectronic recombination of ground-state and metastable Li+ ions (1999)

Saghiri, A.A., Linkemann, J., Schmitt, M., Schwalm, D., Wolf, A., Bartsch, T., ...

Dielectronic recombination has been investigated for Δn=1 resonances of ground-state Li+(1s2) and for Δn=0 resonances of metastable Li+(1s2s 3S). The ground-state spectrum shows three prominent...

Dielectronic recombination of ground-state and metastable Li+ ions (1999)

Saghiri, A.A., Linkemann, J., Schmitt, M., Schwalm, D., Wolf, A., Bartsch, T., ...

Dielectronic recombination has been investigated for Δn=1 resonances of ground-state Li+(1s2) and for Δn=0 resonances of metastable Li+(1s2s 3S). The ground-state spectrum shows three prominent...

Uniform approximations for non-generic bifurcation scenatios including bifurcations of ghost orbits (1999)

Bartsch, T., Main, J., Wunner, G.

Gutzwiller's trace formula allows interpreting the density of states of a classically chaotic quantum system in terms of classical periodic orbits. It diverges when periodic orbits undergo...

Dielectronic recombination in photoionized gas. II. Laboratory measurements for Fe xviii and Fe xix (1999)

Savin, D.W., Kahn, S.M., Linkemann, J., Saghiri, A.A., Schmitt, M., Grieser, M., ...

In photoionized gases with cosmic abundances, dielectronic recombination (DR) proceeds primarily via nlj → nl′j′ core excitations (n = 0 DR). We have measured the resonance strengths and...

Dielectronic recombination in photoionized gas. II. Laboratory measurements for Fe xviii and Fe xix (1999)

Savin, D.W., Kahn, S.M., Linkemann, J., Saghiri, A.A., Schmitt, M., Grieser, M., ...

In photoionized gases with cosmic abundances, dielectronic recombination (DR) proceeds primarily via nlj → nl′j′ core excitations (n = 0 DR). We have measured the resonance strengths and...

Dielectronic recombination in photoionized gas. II. Laboratory measurements for Fe xviii and Fe xix (1999)

Savin, D.W., Kahn, S.M., Linkemann, J., Saghiri, A.A., Schmitt, M., Grieser, M., ...

In photoionized gases with cosmic abundances, dielectronic recombination (DR) proceeds primarily via nlj → nl′j′ core excitations (n = 0 DR). We have measured the resonance strengths and...

Dielectronic Recombination of Ground-State and Metastable Li+ Ions (1999)

Saghiri, A. A., Linkemann, J., Schmitt, M., Schwalm, D., Wolf, A., Bartsch, T., ...

Dielectronic recombination has been investigated for Delta-n = 1 resonances of ground-state Li+(1s^2) and for Delta-n = 0 resonances of metastable Li+(1s2s ^3S). The ground-state spectrum shows three...

Dielectronic Recombination in Photoionized Gas. II. Laboratory Measurements for Fe XVIII and Fe XIX (1999)

Savin, D. W., Kahn, S. M., Linkemann, J., Saghiri, A. A., Schmitt, M., Grieser, M., ...

In photoionized gases with cosmic abundances, dielectronic recombination (DR) proceeds primarily via nlj --> nl'j' core excitations (Dn=0 DR). We have measured the resonance strengths and energies...

Significance of Ghost Orbit Bifurcations in Semiclassical Spectra (1999)

Bartsch, T., Main, J., Wunner, G.

Gutzwiller's trace formula for the semiclassical density of states in a chaotic system diverges near bifurcations of periodic orbits, where it must be replaced with uniform approximations. It is well...

Uniform Approximations for Non-generic Bifurcation Scenarios Including Bifurcations of Ghost Orbits (1999)

T. Bartsch, J. Main, G. Wunner

Gutzwiller's trace formula allows interpretation of the density of states of a classically chaotic quantum system in terms of classical periodic orbits. It diverges when periodic orbits undergo...

Uniform Approximations for Non-generic Bifurcation Scenarios Including Bifurcations of Ghost Orbits (1999)

T. Bartsch, J. Main, G. Wunner

Gutzwiller's trace formula allows interpretation of the density of states of a classically chaotic quantum system in terms of classical periodic orbits. It diverges when periodic orbits undergo...

Significance of ghost orbit bifurcations in semiclassical spectra (1999)

T Bartsch, J Main, G Wunner

Methoden zur empirischen Bewertung der Benutzerfreundlichkeit von Bürosoftware im Rahmen von Prototyping (1991)

Aschersleben, Gisa, Hacker, S., Bartsch, T.

p53-dependent cell cycle arrest induced by N-acetyl-L-leucinyl-L-leucinyl-L-norleucinal in platelet-derived growth factor-stimulated human fibroblasts.

Dietrich, C, Bartsch, T, Schanz, F, Oesch, F, Wieser, R J

Proteases are known to play important roles in cell growth control, although the underlying mechanisms are still poorly understood. Here we show that the protease inhibitor...

p53-dependent cell cycle arrest induced by N-acetyl-L-leucinyl-L-leucinyl-L-norleucinal in platelet-derived growth factor-stimulated human fibroblasts.

Dietrich, C, Bartsch, T, Schanz, F, Oesch, F, Wieser, R J

Proteases are known to play important roles in cell growth control, although the underlying mechanisms are still poorly understood. Here we show that the protease inhibitor...