@article{GebertKretzschmarRegenstein1998,
  author    = {Gebert, Horst and Kretzschmar, Wolfgang and Regenstein, Wolfgang},
  title     = {Ground-state complex formation of perylene with pyromellitic dianhydride studied by static fluorescence quenching},
  year      = {1998},
  language  = {en}
}
@article{RegensteinGebertKretzschmar1998,
  author    = {Regenstein, Wolfgang and Gebert, Horst and Kretzschmar, Wolfgang},
  title     = {Charge transfer interaction and static quenching},
  year      = {1998},
  language  = {en}
}
@article{KoesterkeDreizlerRauch1998,
  author    = {Koesterke, Lars and Dreizler, S. and Rauch, Thomas},
  title     = {On the mass-loss of PG 1159 stars},
  year      = {1998},
  language  = {en}
}
@unpublished{VolosevichMeister1998,
  author    = {Volosevich, Alexandra V. and Meister, Claudia-Veronika},
  title     = {Nonlinear interaction of Farley-Buneman waves},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14851},
  year      = {1998},
  abstract  = {The nonlinear interaction of waves excited by the modified two-stream instability (Farley-Buneman instability) is considered. It is found that, during the linear stage of wave growth, the enhanced pressure of the high-frequency part of the waves locally generates a ponderomotive force. This force acts on the plasma particles and redistributes them. Thus an additional electrostatic polarization field occurs, which influences the low-frequency part of the waves. Then, the low-frequency waves also cause a redistribution of the high-frequency waves. In the paper, a self-consistent system of equations is obtained, which describes the nonlinear interaction of the waves. It is shown that the considered mechanism of wave interaction causes a nonlinear stabilization of the high-frequency waves' growth and a formation of local density structures of the charged particles. The density modifications of the charged particles during the non-linear stage of wave growth and the possible interval of aspect angles of the high-frequency waves are estimated.},
  language  = {en}
}
@unpublished{BraunFeudelGuzdar1998,
  author    = {Braun, Robert and Feudel, Fred and Guzdar, Parvez},
  title     = {The route to chaos for a two-dimensional externally driven flow},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14717},
  year      = {1998},
  abstract  = {We have numerically studied the bifurcations and transition to chaos in a two-dimensional fluid for varying values of the Reynolds number. These investigations have been motivated by experiments in fluids, where an array of vortices was driven by an electromotive force. In these experiments, successive changes leading to a complex motion of the vortices, due to increased forcing, have been explored [Tabeling, Perrin, and Fauve, J. Fluid Mech. 213, 511 (1990)]. We model this experiment by means of two-dimensional Navier-Stokes equations with a special external forcing, driving a linear chain of eight counter-rotating vortices, imposing stress-free boundary conditions in the vertical direction and periodic boundary conditions in the horizontal direction. As the strength of the forcing or the Reynolds number is raised, the original stationary vortex array becomes unstable and a complex sequence of bifurcations is observed. Several steady states and periodic branches and a period doubling cascade appear on the route to chaos. For increasing values of the Reynolds number, shear flow develops, for which the spatial scale is large compared to the scale of the forcing. Furthermore, we have investigated the influence of the aspect ratio of the container as well as the effect of no-slip boundary conditions at the top and bottom, on the bifurcation scenario.},
  language  = {en}
}
@unpublished{Lukaschewitsch1998,
  author    = {Lukaschewitsch, Michael},
  title     = {Geoelectrical conductivity problems on unbounded domains},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14704},
  year      = {1998},
  abstract  = {This paper deals with the electrical conductivity problem in geophysics. It is formulated as an elliptic boundary value problem of second order for a large class of bounded and unbounded domains. A special boundary condition, the so called "Complete Electrode Model", is used. Poincar{\´e} inequalities are formulated and proved in the context of weighted Sobolev spaces, leading to existence and uniqueness statements for the boundary value problem. In addition, a parameter-to-solution operator arising from the inverse conductivity problem in medicine (EIT) and geophysics is investigated mathematically and is shown to be smooth and analytic.},
  language  = {en}
}
@unpublished{MaassPereverzevRamlauetal.1998,
  author    = {Maaß, Peter and Pereverzev, Sergei V. and Ramlau, Ronny and Solodky, Sergei G.},
  title     = {An adaptive discretization for Tikhonov-Phillips regularization with a posteriori parameter selection},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14739},
  year      = {1998},
  abstract  = {The aim of this paper is to describe an efficient strategy for descritizing ill-posed linear operator equations of the first kind: we consider Tikhonov-Phillips-regularization χ^δ α = (a * a + α I)^-1 A * y ^δ with a finite dimensional approximation A n instead of A. We propose a sparse matrix structure which still leads to optimal convergences rates but requires substantially less scalar products for computing A n compared with standard methods.},
  language  = {en}
}
@unpublished{SeehaferSchumacher1998,
  author    = {Seehafer, Norbert and Schumacher, J{\"o}rg},
  title     = {Resistivity profile and instability of the plane sheet pinch},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14686},
  year      = {1998},
  abstract  = {The stability of the quiescent ground state of an incompressible, viscous and electrically conducting fluid sheet, bounded by stress-free parallel planes and driven by an external electric field tangential to the boundaries, is studied numerically. The electrical conductivity varies as cosh-2(x1/a), where x1 is the cross-sheet coordinate and a is the half width of a current layer centered about the midplane of the sheet. For a <~ 0.4L, where L is the distance between the boundary planes, the ground state is unstable to disturbances whose wavelengths parallel to the sheet lie between lower and upper bounds depending on the value of a and on the Hartmann number. Asymmetry of the configuration with respect to the midplane of the sheet, modelled by the addition of an externally imposed constant magnetic field to a symmetric equilibrium field, acts as a stabilizing factor.},
  language  = {en}
}
@unpublished{RuedigerFeudelSeehafer1998,
  author    = {R{\"u}diger, Sten and Feudel, Fred and Seehafer, Norbert},
  title     = {Dynamo bifurcations in an array of driven convection-like rolls},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14678},
  year      = {1998},
  abstract  = {The bifurcations in a three-dimensional incompressible, electrically conducting fluid with an external forcing of the Roberts type have been studied numerically. The corresponding flow can serve as a model for the convection in the outer core of the Earth and is realized in an ongoing laboratory experiment aimed at demonstrating a dynamo effect. The symmetry group of the problem has been determined and special attention has been paid to symmetry breaking by the bifurcations. The nonmagnetic, steady Roberts flow loses stability to a steady magnetic state, which in turn is subject to secondary bifurcations. The secondary solution branches have been traced until they end up in chaotic states.},
  language  = {en}
}
@article{RuedigerFeudelSeehafer1998,
  author    = {R{\"u}diger, Sten and Feudel, Fred and Seehafer, Norbert},
  title     = {Dynamo bifurcations in an array of driven convectionlike rolls},
  year      = {1998},
  language  = {en}
}
@article{SeehaferFeudelGalanti1998,
  author    = {Seehafer, Norbert and Feudel, Fred and Galanti, B.},
  title     = {Bifurcations in a magnetofluid with helical forcing},
  isbn      = {1-563-47284-8},
  year      = {1998},
  language  = {en}
}
@article{Seehafer1998,
  author    = {Seehafer, Norbert},
  title     = {Filaments and the solar dynamo},
  isbn      = {1-88673-370-8},
  year      = {1998},
  language  = {en}
}
@article{SchmidtmannFeudelSeehafer1998,
  author    = {Schmidtmann, Olaf and Feudel, Fred and Seehafer, Norbert},
  title     = {Nonlinear Galerkin methods based on the concept of determining modes for the magnetohydrodynamic equations},
  year      = {1998},
  language  = {en}
}
@article{ZienickeSeehaferFeudel1998,
  author    = {Zienicke, Egbert and Seehafer, Norbert and Feudel, Fred},
  title     = {Bifurcations in two-dimensional Rayleigh-B{\´e}nard convection},
  year      = {1998},
  language  = {en}
}
@book{RuedigerFeudelSeehafer1998,
  author    = {R{\"u}diger, Sten and Feudel, Fred and Seehafer, Norbert},
  title     = {Dynamo bifurcations in an array of driven convectionlike rolls},
  series = {Preprint NLD},
  volume    = {43},
  journal   = {Preprint NLD},
  publisher = {Univ.},
  address   = {Potsdam},
  issn      = {1432-2935},
  pages     = {6 S. : Ill.},
  year      = {1998},
  language  = {en}
}
@article{SeehaferSchumacher1998,
  author    = {Seehafer, Norbert and Schumacher, J{\"o}rg},
  title     = {Resistivity profile and instability of the plane sheet pinch},
  year      = {1998},
  language  = {en}
}
@book{SeehaferSchumacher1998,
  author    = {Seehafer, Norbert and Schumacher, J{\"o}rg},
  title     = {Resistivity profile and instability of the plane sheet pinch},
  series = {Preprint NLD},
  volume    = {44},
  journal   = {Preprint NLD},
  publisher = {Univ. Potsdam},
  address   = {Potsdam},
  issn      = {1432-2935},
  pages     = {27 S. : graph. Darst.},
  year      = {1998},
  language  = {en}
}
@article{JanickeWilkens1998,
  author    = {Janicke, U. and Wilkens, Martin},
  title     = {Atomic matter wave amplification by optical pumping},
  year      = {1998},
  abstract  = {The atom laser (or `Boser') is a device that delivers a beam of atomic de Broglie waves with high coherence and monochromaticity. In this review, we concentrate on an all-optical scheme of an atom laser that is based on optical pumping. The model is first presented in terms of kinetic equations, and its relation to the ordinary laser and the Bose-Einstein condensation is discussed. We then derive a master equation for the quantum statistics dynamics of the atom laser. Neglecting photon reabsorption processes, the master equation is solved and the counting statistics is computed. Finally, the effects of the inelastic reabsorption processes are investigated for the particular case of two atoms. It is shown that the onset of atom-lasing is suppressed in large resonators, but may be achieved in small and/or low-dimensional resonators.},
  language  = {en}
}
@article{BuschEnglertRzazewskietal.1998,
  author    = {Busch, Thomas and Englert, Bertold-Georg and Rzazewski, Kazimierz and Wilkens, Martin},
  title     = {Two cold atoms in a harmonic trap},
  year      = {1998},
  abstract  = {Two ultracold atoms moving in a trap interact weakly at a very short distance. This interaction can be modeled by a properly regularized contact potential. We solve the corresponding time-independent Schr{\"o}dinger equation under the assumption of a parabolic, spherically symmetric trapping potential.},
  language  = {en}
}
@article{LeonhardtWilkens1998,
  author    = {Leonhardt, Ulf and Wilkens, Martin},
  title     = {Aharonov-Bohm scattering of neutral atoms},
  year      = {1998},
  abstract  = {We study the scattering of quantum particles in the presence of an Aharonov-Bohm vortex and in an arbitrary cylindrically symmetric potential. In particular we address the scattering of atoms carrying dipole moments induced by an electrically charged wire and a homogeneous magnetic field. We argue that, despite the strong attraction of the wire, an Aharoniv-Bohm effect will be visible.},
  language  = {en}
}
@article{Wilkens1998,
  author    = {Wilkens, Martin},
  title     = {Quantum Phase of a Moving Dipole},
  year      = {1998},
  abstract  = {It is shown that a neutral particle with an electric dipole moment which moves in a magnetic field acquires a topological phase. This phase may be observed in atom or molecular interferometry.},
  language  = {en}
}
@article{JavanainenWilkens1998,
  author    = {Javanainen, Juha and Wilkens, Martin},
  title     = {Phase and phase diffusion of a split Bose-Einstein condensate},
  year      = {1998},
  language  = {en}
}
@article{HenkelCourtois1998,
  author    = {Henkel, Carsten and Courtois, J.-Y.},
  title     = {Recoil and momentum diffusion of an atom close to a vacuum-dielectric interface},
  year      = {1998},
  abstract  = {We derive the quantum-mechanical master equation (generalized optical Bloch equation) for an atom in the vicinity of a flat dielectric surface. This equation gives access to the semiclassical radiation pressure force and the atomic momentum diffusion tensor, that are expressed in terms of the vacuum field correlation function (electromagnetic field susceptibility). It is demonstrated that the atomic center-of-mass motion provides a nonlocal probe of the electromagnetic vacuum fluctuations. We show in particular that in a circularly polarized evanescent wave, the radiation pressure force experienced by the atoms is not colinear with the evanescent wave's propagation vector. In a linearly polarized evanescent wave, the recoil per fluorescence cycle leads to a net magnetization for a Jg = 1/2 ground state atom.},
  language  = {en}
}
@article{HenkelSandoghdar1998,
  author    = {Henkel, Carsten and Sandoghdar, Vahid},
  title     = {Single-molecule sprectroscopy near structured dielectrics},
  year      = {1998},
  abstract  = {We present an analytical approach to the calculation of the linewidth and lineshift of an atom or molecule in the near field of a structured dielectric surface. For soft surface corrugations with amplitude lambda/50, we find variations of the linewidth in the ten percent region. More strikingly, the shift of the molecular resonance can reach several natural linewidths. We demonstrate that the lateral resolution is of the order of the molecule-surface distance. We give a semiquantitative explanation of the outcome of our calculations that is based on simple intuitive models.},
  language  = {en}
}
@article{WestbrookHenkelWestbrooketal.1998,
  author    = {Westbrook, N. and Henkel, Carsten and Westbrook, C. I. and Landragin, A. and Labeyrie, G. and Cognet, L. and Savalli, V. and Horvath, G. and Aspect, Alain and Moelmer, Klaus and Courtois, J.-Y. and Phillips, W. D. and Kaiser, Rolf and Bagnato, V.},
  title     = {New physics with evanescent wave atomic mirrors : the van der Waals force and atomic diffraction},
  year      = {1998},
  abstract  = {After a brief introduction to the field of atom optics and to atomic mirrors, we present experimental results obtained in our group during the last two years while studying the reflection of rubidium atoms by an evanescent wave. These involve the first measurement of the van der Waals force between an atom in its ground state and a dielectric wall, as well as the demonstration of a reflection grating for atoms at normal incidence. We also consider the influence of quantum reflection and tunnelling phenomena. Further studies using the atomic mirror as a probe of the van der Waals interaction, and of very small surface roughness are briefly discussed.},
  language  = {en}
}
@article{GoldmannMahlstedtJanietzetal.1998,
  author    = {Goldmann, Daniela and Mahlstedt, S. and Janietz, Dietmar and Busch, P. and Schmidt, C. and Stracke, A. and Wendorff, Joachim Heinz},
  title     = {Mesomorphic donor-acceptor twin molecules with covalently linked sheet-like pentaalkyne and nitrofluorenone subunits},
  year      = {1998},
  language  = {en}
}
@article{GoldmannJanietzSchmidtetal.1998,
  author    = {Goldmann, Daniela and Janietz, Dietmar and Schmidt, C. and Wendorff, Joachim Heinz},
  title     = {Liquid crystalline 1,3,5-triazines incorporating rod-like azobenzene sub-units},
  year      = {1998},
  language  = {en}
}
@article{Brehmer1998,
  author    = {Brehmer, Ludwig},
  title     = {Supramolecular architectures for micro-sensorics and molecular electronics},
  year      = {1998},
  language  = {en}
}
@article{DriebeBloeckerHerwigetal.1998,
  author    = {Driebe, Thomas and Bl{\"o}cker, Thomas and Herwig, Falk and Sch{\"o}nberner, Detlef},
  title     = {Diffusive overshooting in hot bottom burning AGB models},
  year      = {1998},
  language  = {en}
}
@article{MakievskiFainermanBreeetal.1998,
  author    = {Makievski, A. V. and Fainerman, V. B. and Bree, M. and W{\"u}stneck, Rainer and Kr{\"a}gel, J{\"u}rgen and Miller, Reinhard},
  title     = {Asdorption of proteins at the liquid/air interface},
  year      = {1998},
  language  = {en}
}
@article{OttoSteigerSchrader1998,
  author    = {Otto, Andreas H. and Steiger, Th. and Schrader, Sigurd},
  title     = {The gas phase acidity of trifluoromethanesulphonic acid : an ab initio MO and density functional theory study},
  year      = {1998},
  language  = {en}
}
@article{LuchtStumpeRutloh1998,
  author    = {Lucht, Sylvia and Stumpe, Joachim and Rutloh, M.},
  title     = {Triple fluorescence of substituted benzanilides in solution and in solid states},
  year      = {1998},
  language  = {en}
}
@article{LangerHegerGarciaSegura1998,
  author    = {Langer, Norbert and Heger, Alexander and Garcia-Segura, Guillermo},
  title     = {Massive stars : the pre-supernova evolution of internal and circumstellar structure},
  year      = {1998},
  language  = {en}
}
@article{LangerBraunWellstein1998,
  author    = {Langer, Norbert and Braun, H. and Wellstein, Stephan},
  title     = {Massive close binaries as source of galatic 26Al},
  year      = {1998},
  language  = {en}
}
@article{KoesterkeWerner1998,
  author    = {Koesterke, Lars and Werner, Klaus},
  title     = {Determination of mass-loss rates of PG 1159 stars from FUV spectroskopy},
  year      = {1998},
  language  = {en}
}
@article{FigerNajarroMorisetal.1998,
  author    = {Figer, Donald F. and Najarro, F. and Moris, Mark and Mclean, Ian S. and Geballe, T. R. and Ghez, A. M. and Langer, Norbert},
  title     = {The Pistol star},
  year      = {1998},
  language  = {en}
}
@article{GarciaSeguraLangerRozyczkaetal.1998,
  author    = {Garcia-Segura, Guillermo and Langer, Norbert and Rozyczka, M. and MacLow, Mordecai-Mark},
  title     = {The effects of rotation and stellar magnetic fields on the nebular shapes : LBV nebulae and PNe},
  year      = {1998},
  language  = {en}
}
@article{HegerLangerWoosley1998,
  author    = {Heger, Alexander and Langer, Norbert and Woosley, S. E.},
  title     = {Nucleosynthesis in rotating massive stars},
  year      = {1998},
  language  = {en}
}
@article{TakahashiFaestermannKienleetal.1998,
  author    = {Takahashi, K. and Faestermann, T. and Kienle, P. and Basch, F. and Langer, Norbert and Wagenhuber, J.},
  title     = {The 187 Re - 187Os cosmochronometry and chemical evolution in the solar neighborhood},
  year      = {1998},
  language  = {en}
}
@article{LangerHegerBraun1998,
  author    = {Langer, Norbert and Heger, Alexander and Braun, H.},
  title     = {Nucleosynthesis in massive stars},
  year      = {1998},
  language  = {en}
}
@article{LangerHeger1998,
  author    = {Langer, Norbert and Heger, Alexander},
  title     = {B[e] supergiants : what is their evolutionary status?},
  year      = {1998},
  language  = {en}
}
@article{DriebeSchoenbernerBloeckeretal.1998,
  author    = {Driebe, Thomas and Sch{\"o}nberner, Detlef and Bl{\"o}cker, Thomas and Herwig, Falk},
  title     = {The evolution of helium white dwarfs : I. the companion of the millisecond pular PSR J1012+5307},
  year      = {1998},
  language  = {en}
}
@article{GraefenerHamannHillieretal.1998,
  author    = {Gr{\"a}fener, G{\"o}tz and Hamann, Wolf-Rainer and Hillier, D. J. and Koesterke, Lars},
  title     = {Spectral analyses of WC stars in the LMC},
  year      = {1998},
  language  = {en}
}
@article{HamannKoesterke1998,
  author    = {Hamann, Wolf-Rainer and Koesterke, Lars},
  title     = {Spectrum formation in clumped stellar winds : consequences for the analyses of Wolf-Rayet spectra},
  year      = {1998},
  language  = {en}
}
@article{HamannKoesterke1998,
  author    = {Hamann, Wolf-Rainer and Koesterke, Lars},
  title     = {The nitrogen spectra of Wolf-Rayet stars},
  year      = {1998},
  language  = {en}
}
@article{HegerLanger1998,
  author    = {Heger, Alexander and Langer, Norbert},
  title     = {The spin-up of contracting red supergiants},
  year      = {1998},
  language  = {en}
}
@article{HerwigSchoenbernerBloecker1998,
  author    = {Herwig, Falk and Sch{\"o}nberner, Detlef and Bl{\"o}cker, Thomas},
  title     = {On the validity of the core-mass luminosity relation for TP-AGB stars with efficient dredge-up},
  year      = {1998},
  language  = {en}
}
@article{Langer1998,
  author    = {Langer, Norbert},
  title     = {Coupled mass and angular momentum loss of massive main sequence stars},
  year      = {1998},
  language  = {en}
}
@article{LeuenhagenHamann1998,
  author    = {Leuenhagen, U. and Hamann, Wolf-Rainer},
  title     = {Spectral analyses of late-type [WC] central stars of planetary nebulae : more empirical constraints for their evolutionary status},
  year      = {1998},
  language  = {en}
}
@article{PenaStastinskaEstebanetal.1998,
  author    = {Pena, M. and Stastinska, G. and Esteban, C. and Koesterke, Lars and Medina, S. and Kingsburgh, R.},
  title     = {Galactic planetary nebulae with Wolf-Rayet nuclei : I. Objects with [WC]-early type stars},
  year      = {1998},
  language  = {en}
}
@article{WittkowskiLangerWeigelt1998,
  author    = {Wittkowski, M. and Langer, Norbert and Weigelt, G.},
  title     = {Diffraction-limited Speckle-Masking interferometry of the red supergiant VY CMa*},
  year      = {1998},
  language  = {en}
}
@article{AlbrechtBrehmerLiemant1998,
  author    = {Albrecht, Fred and Brehmer, Ludwig and Liemant, Alfred},
  title     = {Hopping transport in a disordered lattice simulation of dark discharge},
  year      = {1998},
  abstract  = {On the basis of a stochastic model of hopping transport in disordered solids we present results of simulations of the dark discharge of surface charged thin films considering the energetic distribution of the localised states within the sheet. A non- linear differential equation with suitable boundary and initial conditions describes the time evolution of the space charge. We suppose a Gaussian distribution of energies for the carrier transporting states with a standard deviation s. The arrival time of carriers at the rear electrode of the sandwich sample is studied in dependence on film thickness, initial surface charge, and energetic disorder. Our calculations confirm that the transit time increases indirect proportional with initial surface charge and proportional with the square thickness. For standard deviations of energetic distribution of 0.05 eV up to 0.25 eV the normalised transit time grows as s1.44. We discuss this in terms of the stochastic transport model.},
  language  = {en}
}
@article{PenacoradaSoutoKatholyetal.1998,
  author    = {Pe{\~n}acorada, Florencio and Souto, Jorge and Katholy, Stefan and Saja, Jos{\´e}-Antonio de and Reiche, J{\"u}rgen},
  title     = {Structure of Langmuir monolayers of substituted phthalocyanines},
  year      = {1998},
  abstract  = {Langmuir floating layers of two phthalocyanine derivatives, ytterbium bisphthalocyanine and tetra-tert-butyl nickel phthalocyanine, were investigated by means of compression isotherms, surface potential kinetics and Brewster angle microscopy (BAM) in order to study the influence of peripheral substituents on the structure and stability of these films and on their suitability for a subsequent transfer onto solid substrates. Specific substitutions that may lead to amphiphilic molecular units seem to play a key role in the development of well organised thin films prepared with this technique.},
  language  = {en}
}
@article{VossBuennerAbel1998,
  author    = {Voss, Henning U. and B{\"u}nner, M. J. and Abel, Markus},
  title     = {Identification of continuous, spatiotemporal systems},
  year      = {1998},
  language  = {en}
}
@article{JanietzKatholyBrehmer1998,
  author    = {Janietz, Dietmar and Katholy, Stefan and Brehmer, Ludwig},
  title     = {Monolayer properties of Amphiphilic Tetrakis(phenylethynyl)benzene compounds},
  year      = {1998},
  language  = {en}
}
@article{Janietz1998,
  author    = {Janietz, Dietmar},
  title     = {Structure formation of functional sheet-shaped mesogens},
  year      = {1998},
  language  = {en}
}
@article{GoldmannDietelJanietzetal.1998,
  author    = {Goldmann, Daniela and Dietel, Reinhard and Janietz, Dietmar and Schmidt, C. and Wendorff, Joachim Heinz},
  title     = {Sheet-shaped mesogens based on 1,3,5-Triazines : variation of columnar mesophases through intermolecular hydrogen bonding},
  year      = {1998},
  language  = {en}
}
@article{FreydankJanietzSchulz1998,
  author    = {Freydank, Anke-Christine and Janietz, Silvia and Schulz, Burkhard},
  title     = {Synthesis and electrochemical behaviour of Amphiphilic 1,3,4-Oxadiazole derivatives},
  year      = {1998},
  language  = {en}
}
@article{LorenzMenzel1998,
  author    = {Lorenz, Dieter and Menzel, Ralf},
  title     = {Broadband operation of frequency doubled Cr4+:YAG laser with high beam quality},
  year      = {1998},
  language  = {en}
}
@article{PetzschmannThiessenhusenSpahnetal.1998,
  author    = {Petzschmann, Olaf and Thiessenhusen, Kai-Uwe and Spahn, Frank and Schmidt, J{\"u}rgen},
  title     = {Inelastic collisions in planetary rings : thickness and satellite-induced structures},
  isbn      = {0-7923-5102-9},
  year      = {1998},
  language  = {en}
}
@article{BreitenbachIlluminatiSchilleretal.1998,
  author    = {Breitenbach, Gerd and Illuminati, Fabrizio and Schiller, Stephan and Mlynek, J{\"u}rgen},
  title     = {Broadband detection of squeezed vacuum : a spectrum of quantum states},
  year      = {1998},
  abstract  = {We demonstrate the simultaneous quantum state reconstruction of the spectral modes of the light field emitted by a continuous wave degenerate optical parametric amplifier. The scheme is based on broadband measurement of the quantum fluctuations of the electric field quadratures and subsequent Fourier decomposition into spectral intervals. Applying the standard reconstruction algorithms to each bandwidth-limited quantum trajectory, a "spectrum" of density matrices and Wigner functions is obtained. The recorded states show a smooth transition from the squeezed vacuum to a vacuum state. In the time domain we evaluated the first order correlation function of the squeezed output field, showing good agreement with theory.},
  language  = {en}
}
@article{SchiekDrepperEngbertetal.1998,
  author    = {Schiek, Michael and Drepper, Friedhelm R. and Engbert, Ralf and Suder, Katrin and Abel, Hans-Henning},
  title     = {Cardiorespiratory Synchronization},
  isbn      = {3-540-63481-9},
  year      = {1998},
  abstract  = {The complex behaviour of cardiorespiratory dynamics is shown to be related to the interaction between several physiological oscillators. This study is based on electrocardiogram and respiratory flow data obtained from 3 different subjects during paced breathing at 10 different pacing cycle lengths ranging from 5 s to 12 s. Two different methods ideally suited for the analysis of synchronization pattern of coupled oscillators are applied: 1. Symbolic dynamics based on symbol coding adapted for the detection of respiratory modulation of cardiac parasympathetic activity discloses two regimes of different synchronization behaviour within the frequency area corresponding to the Arnold tongue of 1:1 frequency-locking between respiratory flow and respiratory heartbeat variation (respiratory sinus arrhythmia). 2. The analysis of the phase shift between respiratory flow and respiratory sinus arrhythmia indicates that synchronization is not a static but a dynamic phenomenon. The observed dependence of the phase shift on respiratory cycle length shows large inter-individual variation. These findings turn out to be further hints for the existence of an additional central oscillator in the frequency range of respiration interacting with the central respiratory oscillator driving mechanical respiration.},
  language  = {en}
}
@article{KliemSchwarzKurthsetal.1998,
  author    = {Kliem, Bernhard and Schwarz, Udo and Kurths, J{\"u}rgen and Dennis, Brian and Schwartz, Richard and Aschwanden, Markus J.},
  title     = {Wavelet analysis of solar flare hard X-ray},
  issn      = {0004-637x},
  year      = {1998},
  language  = {en}
}
@article{ZaikinRosenblumLandaetal.1998,
  author    = {Zaikin, Alexei A. and Rosenblum, Michael and Landa, Polina S. and Kurths, J{\"u}rgen},
  title     = {On-off itermittency phenomena in a pendulum with a randomly vibrating suspension axis},
  year      = {1998},
  language  = {en}
}
@article{RosenblumPengIvanovetal.1998,
  author    = {Rosenblum, Michael and Peng, C. K. and Ivanov, Plamen Ch. and Mietus, J. and Havlin, Shlomo and Stanley, H. Eugene and Goldberger, Ary L.},
  title     = {Scaling and universality in heart rate variability distributions},
  year      = {1998},
  language  = {en}
}
@article{EngbertHainzlZoelleretal.1998,
  author    = {Engbert, Ralf and Hainzl, Sebastian and Z{\"o}ller, Gert and Kurths, J{\"u}rgen},
  title     = {Testing for unstable periodic orbits to characterize spatiotemporal dynamics},
  year      = {1998},
  language  = {en}
}
@article{KarolyiPentekToroczkaietal.1998,
  author    = {Karolyi, Gy{\"o}rgy and Pentek, Aron and Toroczkai, Zolt{\´a}n and T{\´e}l, T{\´o}mas and Grebogi, Celso},
  title     = {Advection of active particles in open chaotic flows},
  issn      = {0031-9007},
  year      = {1998},
  language  = {en}
}
@article{SchwarzKurthsSpahnetal.1998,
  author    = {Schwarz, Udo and Kurths, J{\"u}rgen and Spahn, Frank and Petzschmann, Olaf},
  title     = {Reply on the comment of "Clustering of granular assemblies with temperature dependent restitution and under differential rotation"},
  year      = {1998},
  language  = {en}
}
@article{PoonGrebogiFeudeletal.1998,
  author    = {Poon, L. and Grebogi, Celso and Feudel, Ulrike and Yorke, J. A.},
  title     = {Dynamical properties of a simple mechanical system with a large number of coexisting periodic attractors},
  year      = {1998},
  language  = {en}
}
@article{KurthsKliemSchwarzetal.1998,
  author    = {Kurths, J{\"u}rgen and Kliem, Bernhard and Schwarz, Udo and Kr{\"u}ger, Albrecht and Urpo, S.},
  title     = {Multiresolution analysis of solar mm-wave bursts},
  year      = {1998},
  language  = {en}
}
@article{KimKurthsKimetal.1998,
  author    = {Kim, G. G. and Kurths, J{\"u}rgen and Kim, S. and Cao, L. Y.},
  title     = {Detecting determinism in human posture control data},
  year      = {1998},
  language  = {en}
}
@article{LaiGrebogiFeudeletal.1998,
  author    = {Lai, Ying Cheng and Grebogi, Celso and Feudel, Ulrike and Witt, Annette},
  title     = {Basin bifurcation in quasiperiodically forced systems},
  year      = {1998},
  language  = {en}
}
@article{RosenblumKurthsSchaeferetal.1998,
  author    = {Rosenblum, Michael and Kurths, J{\"u}rgen and Sch{\"a}fer, Carsten and Abel, Hans-Henning},
  title     = {Heartbeat synchronized with ventilation},
  year      = {1998},
  language  = {en}
}
@article{SaparinHuppertStoneetal.1998,
  author    = {Saparin, Peter and Huppert, Amit and Stone, L. and Price, C.},
  title     = {El ni{\~n}o chaos : The role of noise and stochastic resonance on the ENSO cycle},
  year      = {1998},
  language  = {en}
}
@article{HnatkovaVesselVossetal.1998,
  author    = {Hnatkova, Katarina and Vessel, N. and Voss, Andreas and Kurths, J{\"u}rgen and Sander, A. and Schirdewan, Alexander and Camm, A. J. and Malik, Marek},
  title     = {Multiparametric analysis of heart rate variability used for risk stratification among survivors of acute myocardial infarction},
  issn      = {0895-2795},
  year      = {1998},
  language  = {en}
}
@article{AbelSpicci1998,
  author    = {Abel, Markus and Spicci, M.},
  title     = {Nonlinear localization periodic solutions in a coupled map lattice},
  year      = {1998},
  abstract  = {We prove the existence of nonlinear localized time-periodic solutions in a chain of symplectic mappings with nearest neighbour coupling. This is a class of systems whose behaviour can be seen as representation of a lattice of pendula. The effect of discrete time changes the mathematical as well as the numerical procedures. Applying the discrete version of Floquet theory eases and clarifies the procedure of proving the existence of the localized time-periodic solutions. As an extension of the concept of rotobreathers one can produce solutions which rotate at every site of the lattice. To consider these we use a general definition of localization.},
  language  = {en}
}
@article{MeierStumpeFischeretal.1998,
  author    = {Meier, Johann Georg and Stumpe, Joachim and Fischer, Birgit and Thieme, Cathrin and Fischer, Thomas M. and Kremer, Friedrich and {\"O}ge, Tanja and Zentel, Rudolf},
  title     = {Optical suppression of Ferroelectricity in polysiloxane copolymers with chiral an potochromic side groups},
  year      = {1998},
  language  = {en}
}
@article{MakievskiFainermanBreeetal.1998,
  author    = {Makievski, A. V. and Fainerman, V. B. and Bree, M. and W{\"u}stneck, Rainer and Kr{\"a}gel, J{\"u}rgen and Miller, Reinhard},
  title     = {Dynamics and thermodynamics of spread and adsorbed food protein layers at the water/air interface},
  year      = {1998},
  language  = {en}
}
@article{WuestneckSiegelEbischetal.1998,
  author    = {W{\"u}stneck, Rainer and Siegel, Stefan and Ebisch, Th. and Miller, Reinhard},
  title     = {Surface behavior of spread sodium eicosanyl sulfate monolayers: 1. p/A isotherms determined on a Langmuir film balance and on drop surfaces and Brewster angle measurements},
  year      = {1998},
  language  = {en}
}
@article{RutlohZebgerHoffmannetal.1998,
  author    = {Rutloh, M. and Zebger, I. and Hoffmann, U. and Stumpe, Joachim and Siesler, H. W.},
  title     = {Photo-Induced orientation effects parallel and perpendicular to the polarization vector of the incident light observed in the same azobenzene containing LC polymer},
  year      = {1998},
  language  = {en}
}
@article{GeueKatholyReicheetal.1998,
  author    = {Geue, Thomas and Katholy, Stefan and Reiche, J{\"u}rgen and Brehmer, Ludwig and Caliebe, W.},
  title     = {Grazing incidence x-ray diffraction (GIXD) measurements of uranyl arachidate (UO2A2) LB films},
  year      = {1998},
  language  = {en}
}
@article{OttoSteigerSchrader1998,
  author    = {Otto, Andreas H. and Steiger, Th. and Schrader, Sigurd},
  title     = {HAICI4 in the gas phase is stronger than HTaF6.},
  year      = {1998},
  language  = {en}
}
@article{MetzgerChenVuillaumeetal.1998,
  author    = {Metzger, Robert M. and Chen, Bo and Vuillaume, Dominique and Lakshmikantham, M. V. and H{\"o}pfner, Ulf and Kawai, Tsuyoshi and Baldwin, Jeffrey W. and Wu, Xiangli and Tachibana, Hiroaki and Sakurai, Hiromi and Cava, Michael P.},
  title     = {Observation of unimolecular electrical rectification in hexadecyquinolinium tricyanoquinodimethamide.},
  year      = {1998},
  language  = {en}
}
@article{DateFawcettGeueetal.1998,
  author    = {Date, R. W. and Fawcett, A. H. and Geue, Thomas and Haferkorn, J. and Malcolm, R. K. and Stumpe, Joachim},
  title     = {Self-ordering within thin films of poly(olefin sulfone)s.},
  year      = {1998},
  language  = {en}
}
@article{MenzelRuetherStumpeetal.1998,
  author    = {Menzel, Henning and R{\"u}ther, M. and Stumpe, Joachim and Fischer, Thomas M.},
  title     = {Discrimination of structural order and chromophore aggregation as factors effecting the photo-reorientation of Azobenzene in copolyglutamate LB-films.},
  year      = {1998},
  language  = {en}
}
@article{SapichKrawinkelKricheldorfetal.1998,
  author    = {Sapich, B. and Krawinkel, Th. and Kricheldorf, H. R. and Stumpe, Joachim},
  title     = {New polymer syntheses 95. Photosetting cholesteric polyesters derived from 4-hydroxycinnamic acid and isosorbide.},
  year      = {1998},
  language  = {en}
}
@article{HaferkornGeueDateetal.1998,
  author    = {Haferkorn, J. and Geue, Thomas and Date, R. W. and Fawcett, A. H. and Stumpe, Joachim},
  title     = {Aggregation and orientation phenomena in constrained films of Poly(olefine sulfone)s.},
  year      = {1998},
  language  = {en}
}
@article{KamphausenStumpe1998,
  author    = {Kamphausen, C. and Stumpe, Joachim},
  title     = {Photoreactions of N-Salycylidenaniles in Glassy PMMA films.},
  year      = {1998},
  language  = {en}
}
@article{HaferkornSapichStumpeetal.1998,
  author    = {Haferkorn, J. and Sapich, B. and Stumpe, Joachim and Sch{\"o}nhals, A.},
  title     = {Photochemical modification of the dynamic behavior of Liquid Crystals.},
  year      = {1998},
  language  = {en}
}
@article{EckhardtRutlohStumpeetal.1998,
  author    = {Eckhardt, Th. and Rutloh, M. and Stumpe, Joachim and Kr{\"u}ger, Harald},
  title     = {Photo-Induced "Command Effects" in LC polymers by the combination of photoorientation and thermotropic self- organization},
  year      = {1998},
  language  = {en}
}
@article{StumpeFischerRutlohetal.1998,
  author    = {Stumpe, Joachim and Fischer, Thomas M. and Rutloh, M. and Meier, Johann Georg},
  title     = {Photo-Induced orientation effects parallel and perpendicular to the polarization vector of the incident light observed in the same Azobenzene containing LC polymer.},
  year      = {1998},
  language  = {en}
}
@article{WuestneckSiegelEbischetal.1998,
  author    = {W{\"u}stneck, Rainer and Siegel, Stefan and Ebisch, Th. and Miller, Reinhard},
  title     = {Surface behavior of spread sodium eicosanyl sulfate monolayers: 3. Eicosanyl sulfate monolayers spread on a NaCl subphase},
  year      = {1998},
  language  = {en}
}
@article{ZieglerFischerMenzeletal.1998,
  author    = {Ziegler, A. and Fischer, Thomas M. and Menzel, Henning and Stumpe, Joachim},
  title     = {Photo-Induced modification and photo-orientation in LB-multilayers of thermotropic polymers containing azobenzene side groups},
  year      = {1998},
  language  = {en}
}
@phdthesis{vonRekowski1998,
  author    = {von Rekowski, Brigitta},
  title     = {Str{\"o}mungen und Wirbelsysteme in turbulenten Himmelsk{\"o}rpern mit AKA-Effekt},
  pages     = {II, 85 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}
@phdthesis{Heuer1998,
  author    = {Heuer, Axel},
  title     = {Phasenkonjugierende Spiegel auf Basis der stimulierten Brillouin-Streuung in optischen Wellenleitern},
  pages     = {92 S. : Ill.},
  year      = {1998},
  language  = {de}
}
@phdthesis{Goldmann1998,
  author    = {Goldmann, Daniela},
  title     = {Neuartige fl{\"u}ssigkristalline Systeme mit 1,3,5-Triazinen als heteroaromatischem Molek{\"u}lkern},
  pages     = {110 S. : Ill.},
  year      = {1998},
  language  = {de}
}
@phdthesis{Lenz1998,
  author    = {Lenz, Peter},
  title     = {Benetzungsph{\"a}nomene auf strukturierten Substraten},
  pages     = {100 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}
@phdthesis{Stoemmer1998,
  author    = {St{\"o}mmer, Ralph},
  title     = {X-ray scattering from silicon surfaces and thin oxides on silicon substrates},
  pages     = {108 S. : graph. Darst.},
  year      = {1998},
  language  = {en}
}
@phdthesis{Gau1998,
  author    = {Gau, Hartmut},
  title     = {Stabilit{\"a}t und Dynamik fluider Mikrostrukturen},
  address   = {Potsdam},
  pages     = {II, 98 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}
@phdthesis{Ostermeyer1998,
  author    = {Ostermeyer, Martin},
  title     = {Nd:YAG und Nd:YALO Laseroszillatoren im transversalen Grundmodebetrieb unter Einsatz phasenkonjugierender SBS- Spiegel},
  pages     = {147 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}