TY  - THES
A1  - Wedel, Armin
T1  - Untersuchungen zum Dipolschaltverhalten an Polymerfestkörpern
Y1  - 1992
ER  - 
TY  - THES
A1  - Gerhard, Reimund
T1  - Präparation und Untersuchung von Festkörperschichten für Sensorik und Photonik : eine Zusammenstellung von Veröffentlichungen
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Mikelskis, Helmut
T1  - Schneller als der Wind : zur Behandlung des Darrieus-Windrotors im Physikunterricht
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Mikelskis, Helmut
T1  - Zukunftsperspektiven physikdidaktischer Forschung im vereinigten Deutschland
Y1  - 1993
SN  - 3-88064-223-0
ER  - 
TY  - BOOK
A1  - Duit, Reinders
A1  - Mikelskis, Helmut
T1  - Physik, um die Welt zu begreifen : ein Lehrbuch für die Jahrgangsstufe 5/6 ; [Hauptbd.], Nordrhein- Westfalen
Y1  - 1993
SN  - 3-425-03671-8
PB  - Diesterweg
CY  - Frankfurt am Main
ER  - 
TY  - BOOK
A1  - Duit, Reinders
A1  - Mikelskis, Helmut
T1  - Physik - Chemie, um die Welt zu begreifen : ein Lehrbuch für die Orientierungsstufe ; [Hauptbd.], Niedersachsen
Y1  - 1993
SN  - 3-425-03675-0
VL  - 3675
PB  - Diesterweg
CY  - Frankfurt am Main
ER  - 
TY  - JOUR
A1  - Mikelskis, Helmut
T1  - Zur Ökologisierung des Lernprozesses : Versuch über einen vernachlässigten Aspekt von Umweltbildung
Y1  - 1993
SN  - 3-89088-073-8
ER  - 
TY  - BOOK
A1  - Marquardt-Mau, Brunhilde
A1  - Mayer, Jürgen
A1  - Mikelskis, Helmut
T1  - Umwelt : Lexikon ökologisches Grundwissen
Y1  - 1993
SN  - 3-499-16337-3
VL  - 6337
PB  - Rowohlt
CY  - Reinbek bei Hamburg
ER  - 
TY  - BOOK
A1  - Hänsel, Horst
A1  - Neumann, Werner
A1  - Hudel, Erich
T1  - Physik : Bd. 2 Elektrizität, Optik, Raum und Zeit
Y1  - 1993
SN  - 3-86025-304-2
VL  - 2
PB  - Spektrum Akad. Verl.
CY  - Heidelberg
ER  - 
TY  - THES
A1  - Pedzisz, Bozena
T1  - Zur Rolle historischer Betrachtungen im Physikunterricht unter besonderer Berücksichtigung grundlegender Experimente
Y1  - 1993
ER  - 
TY  - BOOK
A1  - Hänsel, Horst
A1  - Neumann, Werner
A1  - Wedell, Reiner
T1  - Physik : Bd. 1 Mechanik und Wärmelehre
Y1  - 1993
SN  - 3-86025-046-9
VL  - 1
PB  - Spektrum Akad. Verl.
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Hubrig, Swetlana
A1  - Mathys, Gautier
T1  - Mass loss, magnetic field and chemical inhomogenities in the he-weak star HD 21699
Y1  - 1993
ER  - 
TY  - INPR
A1  - Witt, Annette
A1  - Kurths, Jürgen
A1  - Krause, F.
A1  - Fischer, K.
T1  - On the validity of a model for the reversals of the Earth‘s magnetic field
N2  - We have used techniques of nonlinear dynamics to compare a special model for the reversals of the Earth's magnetic field with the observational data. Although this model is rather simple, there is no essential difference to the data by means of well-known characteristics, such as correlation function and probability distribution. Applying methods of symbolic dynamics we have found that the considered model is not able to describe the dynamical properties of the observed process. These significant differences are expressed by algorithmic complexity and Renyi information.
T3  - NLD Preprints - 4 
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13460
ER  - 
TY  - INPR
A1  - Kurths, Jürgen
A1  - Voss, A.
A1  - Witt, Annette
A1  - Saparin, P.
A1  - Kleiner, H. J.
A1  - Wessel, Niels
T1  - Quantitative analysis of heart rate variability
N2  - In the modern industrialized countries every year several hundred thousands of people die due to the sudden cardiac death. The individual risk for this sudden cardiac death cannot be defined precisely by common available, non-invasive diagnostic tools like Holter-monitoring, highly amplified ECG and traditional linear analysis of heart rate variability (HRV). Therefore, we apply some rather unconventional methods of nonlinear dynamics to analyse the HRV. Especially, some complexity measures that are basing on symbolic dynamics as well as a new measure, the renormalized entropy, detect some abnormalities in the HRV of several patients who have been classified in the low risk group by traditional methods. A combination of these complexity measures with the parameters in the frequency domain seems to be a promising way to get a more precise definition of the individual risk. These findings have to be validated by a representative number of patients.
T3  - NLD Preprints - 5 
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13470
ER  - 
TY  - JOUR
A1  - Seehafer, Norbert
T1  - Relaxation to equilibrium and inverse energy cascades in solar active regions
Y1  - 1994
SN  - 1-563-47099-3
SN  - 0079-6050
ER  - 
TY  - JOUR
A1  - Seehafer, Norbert
T1  - Current helicity and the turbulent electromotive force
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Seehafer, Norbert
T1  - Alpha effect in the solar atmosphere
Y1  - 1994
ER  - 
TY  - INPR
A1  - Feudel, Fred
A1  - Seehafer, Norbert
T1  - On the bifurcation phenomena in truncations of the 2D Navier-Stokes equations
N2  - We have studied bifurcation phenomena for the incompressable Navier-Stokes equations in two space dimensions with periodic boundary conditions. Fourier representations of velocity and pressure have been used to transform the original partial differential equations into systems of ordinary differential equations (ODE), to which then numerical methods for the qualitative analysis of systems of ODE have been applied, supplemented by the simulative calculation of solutions for selected initial conditions. Invariant sets, notably steady states, have been traced for varying Reynolds number or strength of the imposed forcing, respectively. A complete bifurcation sequence leading to chaos is described in detail, including the calculation of the Lyapunov exponents that characterize the resulting chaotic branch in the bifurcation diagram.
T3  - NLD Preprints - 1 
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13390
ER  - 
TY  - GEN
A1  - Henkel, Carsten
A1  - Steane, Andrew M.
A1  - Kaiser, Robin
A1  - Dalibard, Jean
T1  - A modulated mirror for atomic interferometry
N2  - A novel atomic beam splitter, using reflection of atoms off an evanescent light wave, is investigated theoretically. The intensity or frequency of the light is modulated in order to create sidebands on the reflected de Broglie wave. The weights and phases of the various sidevands are calculated using three different approaches: the Born approximation, a semiclassical path integral approach, and a numerical solution of the time-dependent Schrdinger equation. We show how this modulated mirror could be used to build practical atomic interferometers.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 102 
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-42279
ER  - 
TY  - GEN
A1  - Henkel, Carsten
A1  - Courtois, Jean-Yves
A1  - Aspect, Alain
T1  - Atomic diffraction by a thin phase grating
N2  - We present a semiclassical perturbation method for the description of atomic diffraction by a weakly modulated potential. It proceeds in a way similar to the treatment of light diffraction by a thin phase grating, and consists in calculating the atomic wavefunction by means of action integrals along the classical trajectories of the atoms in the absence of the modulated part of the potential. The capabilities and the validity condition of the method are illustrated on the well-known case of atomic diffraction by a Gaussian standing wave. We prove that in this situation the perturbation method is equivalent to the Raman-Nath approximation, and we point out that the usually-considered Raman-Nath validity condition can lead to inaccuracies in the evaluation of the phases of the diffraction amplitudes. The method is also applied to the case of an evanescent wave reflection grating, and an analytical expression for the diffraction pattern at any incidence angle is obtained for the first time. Finally, the application of the method to other situations is briefly discussed.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 101 
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-42269
ER  - 
TY  - GEN
A1  - Henkel, Carsten
A1  - Courtois, Jean-Yves
A1  - Kaiser, Robin
A1  - Westbrook, C.
A1  - Aspect, Alain
T1  - Phase shifts of atomic de Broglie waves at an evanescent wave mirror
N2  - A detailed theoretical investigation of the reflection of an atomic de Broglie wave at an evanescent wave mirror is presented. The classical and the semiclassical descriptions of the reflection process are reviewed, and a full wave-mechanical approach based on the analytical soution of the corresponding Schrödinger equation is presented. The phase shift at reflection is calculated exactly and interpreted in terms of instantaneous reflection of the atom at an effective mirror. Besides the semiclassical regime of reflection describable by the WKB method, a pure quantum regime of reflection is identified in the limit where the incident de Broglie wavelength is large compared to the evanescent wave decay length.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 103 
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-42289
ER  - 
TY  - JOUR
A1  - Janietz, Dietmar
A1  - Hofmann, Dieter
A1  - Reiche, Jürgen
T1  - Molecular organization of amphiphilic disc-shaped penta-alkynes in LB-mono- and multilayers
N2  - Amphiphilic disc-shaped penta-alkynes were studied with regard to their molecular organization in Langmuir-Blod- gett (LB) mono- and multilayers. It was found that each compound investigated forms edge-on arranged stable monolayers at the air-water interface. LB-multilayers derived from fivefold pentyl-substituted pentaynes are characterized by an edge-on ordering of the molecules within Y-type bilayers. One of these compounds, containing a hydoxy substituent as hydrophilic head group, is exemplified and two possible rectangular molecular assemblies perpendicular to the substrate, each with a columnar in-plane packing, will be discussed as a result of molecular modelling. Based on the experimental results, hexagonal layer packing in the LB-film of a disc-shaped penta-alkynyl carboxylic acid without lateral substituents proved to be possible, which, furthermore, could be confirmed by molecular mechanics simulation.
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Hochheimer, H. D.
A1  - Menon, V.
A1  - Parthasarathy, R.
A1  - Martin, C. R.
A1  - Bechthold, Jeff
A1  - Hor, P.-H.
A1  - Lorenz, Bernd
A1  - Spatz, J. P.
T1  - High pressure study of the temperature dependence of the conductivity of template synthesized polyaniline and polypyrrole
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Hochheimer, H. D.
A1  - Menon, V.
A1  - Parthasarathy, R.
A1  - Martin, C. R.
A1  - Bechthold, Jeff
A1  - Hor, P.-H.
A1  - Lorenz, Bernd
A1  - Spatz, J. P.
T1  - High pressure conductivity of template synthesized polypyrrole
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Knochenhauer, Gerald
T1  - Numerische Simulation und Röntgenbeugung an thermisch aufgedampften Multischichten perfluorierter Fettsäuren
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Lorenz, Bernd
A1  - Spatz, J. P.
A1  - Hochheimer, H. D.
A1  - Menon, V.
A1  - Parthasarathy, R.
A1  - Martin, C. R.
A1  - Bechthold, Jeff
A1  - Hor, P.-H.
T1  - Dimensional crossover of the temperature dependence of the electrical conductivity of template synthesized polyaniline and polypyrrole
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Lorenz, Bernd
A1  - Tozer, S. W.
A1  - Hochheimer, H. D.
A1  - Menon, V.
A1  - Parthasarathy, R.
A1  - Martin, C. R.
T1  - Magnetoresistance of conducting polymers
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Lorenz, Bernd
A1  - Spatz, J. P.
A1  - Weishaupt, K.
A1  - Hochheimer, H. D.
A1  - Menon, V.
A1  - Parthasarathy, R.
A1  - Martin, C. R.
A1  - Bechthold, Jeff
A1  - Hor, P.-H.
T1  - Observation of crossover from three to two dimensional variable range hopping in template synthesized polypyrrole and polyaniline
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Barberka, Thomas Andreas
A1  - Knochenhauer, Gerald
A1  - Woolley, Martin
A1  - Pietsch, Ullrich
T1  - Comprehensive structure investigation and computer modelling of perfluorododecanoic acid multilayers formed by in-vacuo thermal evaporation
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Werner, Klaus
A1  - Barstow, Martin A.
A1  - Holberg, J. B.
A1  - Koester, D.
A1  - Nousek, J. A.
T1  - Extreme ultraviolet spectroscopy of white dwarfs
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Barberka, Thomas Andreas
A1  - Janietz, Dietmar
A1  - Hofmann, Dieter
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
T1  - X-ray structure investigation and computer modelling of Langmuir-Blodgett films formed from disc-shaped pentaalkines
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Liperovskaya, E. V.
A1  - Pochotelov, O. A.
A1  - Liperovsky, Viktor A.
A1  - Oleynik, M. A.
A1  - Meister, Claudia-Veronika
A1  - Christakis, N.
T1  - A comparison of seismic and anthropogenic effects in the night-time sporadic E-layer of the ionosphere
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Baier, Frank W.
A1  - McGillivray, H. T.
A1  - Flin, P.
A1  - Krywult, J.
T1  - The imadmissibility of radial number density profiles of galaxy clusters
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Angelova, Angelina
A1  - Penacorada, Florencio
A1  - Stiller, Burkhard
A1  - Zetzsche, Thomas
A1  - Ionov, Radoslav
A1  - Kamusewitz, Helmut
A1  - Brehmer, Ludwig
T1  - Wettability, surface morphology and stability of long chain ester multilayers obtained by different Langmuir- Blodgett deposition type
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Janietz, Dietmar
A1  - Festag, R.
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Self-organization of new oligomers containing disc-shaped side groups
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Schulz, Burkhard
A1  - Stiller, Burkhard
A1  - Zetzsche, Thomas
A1  - Knochenhauer, Gerald
A1  - Dietel, Reinhard
A1  - Brehmer, Ludwig
T1  - Crystal structure of 2,5-Di(4- methoxycarbonyl-phenyl)-1,3,4-oxadiazole characterized by AFM and IR- spectroscopy
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Lorenz, Bernd
A1  - Miller, A. J.
A1  - Hochheimer, H. D.
A1  - Hönle, W.
T1  - The observation of a new high pressure phase transition in tetramethyl ammonium tetrabromocuprate
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Mercer, Frank W.
A1  - McKenzie, M.
A1  - Bruma, Maria
A1  - Schulz, Burkhard
T1  - Synthesis and properties of fluorinated polyimides and fluorinated poly(imide-amide)s containing pendent cyano groups
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Liperovsky, Viktor A.
A1  - Meister, Claudia-Veronika
A1  - Haldoupis, Ch.
A1  - Schlegel, K.
T1  - Electrical currents and Farley-Buneman turbulence in mid-latitude sporadic E-layers
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Sobisch, Titus
A1  - Kühnemund, Lutz
A1  - Hübner, Heike
A1  - Reinisch, Gerhard
A1  - Krägel, Jürgen
T1  - Physicochemical aspects of in situ surfactant washing of oil contaminated soils
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Schulz, Burkhard
A1  - Knochenhauer, Gerald
A1  - Brehmer, Ludwig
A1  - Janietz, Silvia
T1  - Stuctures and properties of aromatic poly(1,3,4-oxadiazole)s
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Wüstneck, Rainer
A1  - Miller, Reinhard
A1  - Kriwanek, J.
A1  - Holzbauer, H.-R.
T1  - Quantification of synergistic interaction between different surfactants using a generalised Frumkin-Damaskin adsorption isotherm
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Wüstneck, Rainer
A1  - Fiedler, H.
A1  - Miller, Reinhard
A1  - Haage, K.
T1  - Surface chemical characterisation of maleic acid mono[(4-alkyl-piperazine-2-yl)-ethylesters] : 2. The pH dependent adsorption behavior of an ampholytic surfactant
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Hubrig, Swetlana
A1  - Plachinda, S. I.
A1  - Hünsch, M.
A1  - Schröder, K.-P.
T1  - Search for magnetic fields in late-type giants
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Krägel, Jürgen
A1  - Siegel, Stefan
A1  - Miller, Reinhard
A1  - Born, Michael
A1  - Schano, Karl-Heinz
T1  - Measurement of interfacial shear rheological properties : an automated apparatus
Y1  - 1994
SN  - 0927-7757
ER  - 
TY  - JOUR
A1  - Bruma, Maria
A1  - Mercer, Frank W.
A1  - Schulz, Burkhard
A1  - Dietel, Reinhard
A1  - Fitch, J.
A1  - Cassidy, Peter
T1  - Study of crosslinking process in fluorinated poly(imide-amide)s containing pendant cyano groups
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Eichler, Hans Joachim
A1  - Haase, Alfred
A1  - Menzel, Ralf
A1  - Schwartz, J.
T1  - Depolarization treatment and optimization of high power double pass neodym-rod amplifiers with SBS mirror
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Brehmer, Ludwig
A1  - Hahn, M.
A1  - Seifert, M.
A1  - Wernecke, R.
A1  - Jäger, Werner
A1  - Wonnenberg, R.
A1  - Zehner, C.
T1  - Verfahren zur Herstellung eines Feuchtsensor
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Hänsel, Horst
A1  - Waclawek, W.
A1  - Weigt, Harry
A1  - Kwak, A.
T1  - Phthalocyanine chemisensors, part I : oscillation spectra of lanthanide diphthalocyanines
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Wagner, R.
A1  - Sonneck, G.
A1  - Wüstneck, Rainer
A1  - Jänicke, A.
A1  - Herbst, M.
A1  - Richter, L.
T1  - The effect of dicyclopentadienyl moieties containing structures on the interfacial behaviour of silicone surfactants
Y1  - 1994
ER  -