TY  - JOUR
A1  - Denecke, Klaus-Dieter
T1  - Congruences on maximal partial clones and strong regular varieties generated by preprimal partial algebras II
Y1  - 1991
ER  - 
TY  - JOUR
A1  - Denecke, Klaus-Dieter
T1  - Strong regular varieties of partial algebras I
Y1  - 1991
ER  - 
TY  - JOUR
A1  - Denecke, Klaus-Dieter
T1  - Minimal algebras and category equivalences
Y1  - 1991
ER  - 
TY  - JOUR
A1  - Crome, Erhard
A1  - Franzke, Jochen
A1  - Montag, Claus
A1  - Schrader, Lutz
T1  - New challenges for european security policy in the 90s
Y1  - 1991
ER  - 
TY  - JOUR
A1  - Neumann, Werner
A1  - Kasper, Sabine
A1  - Kasper, Roberto
T1  - Discharge Currents in Polymer Solids between Blocking Contacts
Y1  - 1991
SN  - 0-7803-0113- 7
ER  - 
TY  - JOUR
A1  - Dittmann-Kohli, Freya
A1  - Lachmann, Margic
A1  - Kliegl, Reinhold
A1  - Baltes, Paul B.
T1  - Effects of cognitive training and testing on intellectual efficacy beliefs in elderly adults
Y1  - 1991
ER  - 
TY  - JOUR
A1  - Thompson, Laura A.
A1  - Kliegl, Reinhold
T1  - Adult age effects of plausibility on memory : the role of time constraints during encoding
Y1  - 1991
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Dietel, Reinhard
A1  - Lemmetyinen, Helge
A1  - Janietz, Dietmar
A1  - Lemmetyinen, Helge
A1  - Brehmer, Ludwig
T1  - Edge-on Langmuir-Blodgett multilayers derived from disc-shaped multiyne mesogens
N2  - Langmuir-Blodgett(LB) multilayers were prepared from disc-shaped multiyne mesogens based on amphiphilic alkyl pentakis(aryl-ethynyl)benzene ethers. The two compounds used are characterized by five hydrophobic flexible chains and one hydrophilic substituent at the terminal position of the alkoxy chain. The LB films were analysed by X-ray scattering and spectroscopic measurements. An edge-on arrangement of the two discotic pentaalkynes within Y-type bilayers with a different packing density proved to be possible for the LB films of both compounds.
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Schneider, Ingo
A1  - Köhler, Brigitte
T1  - Amitrole tolerance in cell and tissue cultures and regenerated plants from Nicotiana plumbaginifolia : II. Selection system: suspension culture
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Kleinpeter, Erich
A1  - Stohß, S.
A1  - Schroth, W.
T1  - Stereochemistry and complexational behaviour of dibenzo-crown ethers
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Kleinpeter, Erich
A1  - Hartmann, Jürgen
A1  - Schroth, W.
A1  - Hofer, O.
A1  - Kalchhauser, H.
A1  - Wurz, G.
T1  - Synthesis and conformational behaviour of Ditosyldiaza[2.2]orthometacyclophanes
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Lindenberger, Ulman
A1  - Kliegl, Reinhold
A1  - Baltes, Paul B.
T1  - Professional expertise does not eliminate negative age differences in imagery-based memory performance during adulthood
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Baltes, Paul B.
A1  - Kliegl, Reinhold
T1  - Further testing of limits of cognitive plasticity : negative age differences in a mnemonic skill are robust
Y1  - 1992
SN  - 0012-1649
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Pietsch, Ullrich
A1  - Fink, Hans-Peter
A1  - Lemmetyinen, Helge
T1  - A comparison fo x-ray methods for structure refinement of Langmuir-Blodgett multilayers
N2  - The possibilities and limits of structure refinement of Langmuir-Blodgett films by means of symmetrical reflection of X- rays are described using the example of a stearic acid multilayer. Three different techniques for the determiantion of the electron density profile from reflectivity data are compared; a Fourier method, a Patterson method, and model calculations. The important role of the a priori information for finding the besft structure model is outlined.
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Mikelskis, Helmut
T1  - Combining issues of "girl-suited" science teaching, STS and constructivism in a physics textbook
Y1  - 1992
SN  - 0157-244X
ER  - 
TY  - JOUR
A1  - Gienow, Wilfried
T1  - 2nd English Studies Conference at the Freie Universität Berlin
BT  - Second English Studies Conference at the Freie Universität Berlin
T2  - 2nd English Studies Conference at the Freie Universität Berlin
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Herzschuh, R.
A1  - Wenzlawiak, B.
A1  - Plaggenborg, L.
A1  - Mickler, Wulfhard
A1  - Uhlemann, Erhard
T1  - The characterization of the active components in commercial ß-diketone-type extractants LIX 54 and MX 80 A
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Mickler, Wulfhard
A1  - Uhlemann, Erhard
T1  - Liquid-Liquid-Extraktion of copper from ammoniacal solutions with ß-diketones
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Braunß, Hans-Andreas
T1  - On holomorphic mappings of Schatten class type
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Saupe, Gabriele
A1  - Thieme, Siegfried
T1  - Rual areas in the land of Brandenburg - whatïs their future?
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Amendola, Luca
A1  - Battaglia Mayer, Alexandra
A1  - Capozziello, Salvatore
A1  - Gottlöber, Stefan
A1  - Müller, Volker
A1  - Occhionero, Franco
A1  - Schmidt, Hans-Jürgen
T1  - Generalized sixth-order gravity and inflation
JF  - Preprint / Universität Potsdam, Fachbereich Mathematik
Y1  - 1992
VL  - 1992, 04
PB  - Univ.
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Gottlöber, Stefan
A1  - Schmidt, Hans-Jürgen
A1  - Starobinsky, A. A.
A1  - Müller, Volker
T1  - Models of chaotic inflation
JF  - Preprint / Universität Potsdam, Fachbereich Mathematik
Y1  - 1992
VL  - 1992, 08
PB  - Univ.
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Schoeps, Julius H.
T1  - Under the influence of Heinrich Heine : Aron Bernstein as a writer and literary critic
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Kurths, Jürgen
A1  - Schwarz, Udo
T1  - Application of techniques of nonlinear dynamics to SS Cyg
N2  - We look for structural properties in the light curve of the dwarf nova SS Cyg by means of techniques from nonlinear dynamics. Applying the popular Grassberger-Procaccia procedure, Cannizzo and Goddings (1988) showed that there is no evidence for a low-dimensional attractor underlying this record. Because there are some hints for order in the light curve, we search for other signatures of deterministic systems. Therefore, we use other methods recently developed in this theory, such as local linear prediction and recurrence maps. Our main findings are: i] the prediction error grows exponentially during outburst phases, but via a power law in the quiescent states, ii] there are some rather regular patterns in this light curve which sometimes recur, but the recurrence is not regular. This leads to the following conclusions: i] The outburst dynamics shows a higher degree of order than the quiescent one. There are some hints for deterministic chaos in the outburst behavior. ii] The light curve is a complex mixture of deterministic and stochastic structures. The analysis presented in this paper shows that methods of nonlinear dynamics can be an efficient tool for the study of complex processes, even if there is no evidence for a low-dimensional attractor.
Y1  - 1993
UR  - http://www.agnld.uni-potsdam.de/~shw/Paper/SS_Cyg_AIP.ps.gz
SN  - 0-7503-0282-8
ER  - 
TY  - JOUR
A1  - Schwarz, udo
A1  - Benz, Arnold O.
A1  - Kurths, Jürgen
A1  - Witt, Annette
T1  - Analysis of solar spike events by means of symbolic dynamics methods
N2  - Using quantities of symbolic dynamics, such as mutual information, Shannon information and algorithmic complexity, we have searched for interrelations of spikes emitted simultaneously at different frequencies during the impulsive phase of a flare event. As the spikes are related to the flare energy release and are interpreted as emissions originating at different sites having different magnetic field strengths, any relation in frequency is interpretated as a relation in space. This approach is appropriate to characterize such spatio-temporal patterns, whereas the popular estimate of fractal dimensions can be applied to low-dimensional systems only. Depending on the energy release and emission processes, two types of fragmentation are possible: a scenario of global organization (spikes are emitted in a succession of similar events by the same system) or a scenario of local organization (many systems triggered by an initial event). Mutual information which is a generalization of correlation indicates a relation in frequency beyond the bandwidth of individual spikes. The scans in the spectrograms with large mutual information also show a low level of Shannon information and algorithmic complexity, indicating that the simultaneous appearance of spikes at other frequencies is not a completely stochastic phenomenon (white noise). It may be caused by a nonlinear deterministic system or by a Markov process. By means of mutual information we find a memory over frequency intervals up to 60 MHz. Shannon information and algorithmic complexity concern the mbox{whole} frequency region, i.e. the global source region. A global organization is also apparent in quasi-periodic changes of the Shannon information and algorithmic complexity in the range of 2 - 8 seconds. The finding is compatible with a scenario of local organization in which the information of one event spreads spatially and triggers further events at different places. The region is not an ensemble of independently flashing sources, each representing a system that cascades in energy after an initial trigger. On the contrary, there is a causal connection between the sources at any time. The analysis of the four spike events suggests that the structure in frequency is not stochastic but a process in which spikes at nearby locations are simultaneously triggered by a common exciter.
Y1  - 1993
UR  - http://www.astro.phys.ethz.ch/papers/benz/schwarz/schwarz/schwarz.html
SN  - 004-6361
ER  - 
TY  - JOUR
A1  - Besnard, Philippe
A1  - Schaub, Torsten H.
T1  - A context-based framework for default logics
Y1  - 1993
SN  - 0-262-51071-5
ER  - 
TY  - JOUR
A1  - Brunkhorst, Martin
T1  - Sidney, Shakespeare, and the Contingencies of Performance
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Haufe, G.
A1  - Rolle, U.
A1  - Kleinpeter, Erich
A1  - Kivikoski, J.
A1  - Rissanen, K.
T1  - N-Heterocyclization in electrophilic haloamination reactions of 1,5-cyclooctadiene : formation of the granatanine and homotropane skeletons
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Mickler, Wulfhard
T1  - Liquid-liquid-extraction of copper from ammoniacal solution with 4-acylpyrazol-5-ones and ß-diketones
Y1  - 1993
SN  - 1-85861-042-7
ER  - 
TY  - JOUR
A1  - Lüth, Christoph
T1  - State-controlled and private education in Rousseau : two mutually exclusive theories?
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Mayr, Ulrich
A1  - Kliegl, Reinhold
T1  - Sequential and coordinative complexity : age-based processing limitations in figural transformation
N2  - Dimensions of cognitive complexity in figural transformations were examined in the context of adult age differences. Sequential complexity was manipulated through figural transformations of single objects in a multiple- object array. Coordinative complexity was induced through spatial or nonspatial transformations of the entire array. Results confirmed the prediction that age-related slowing is larger in coordinative complexity than in sequential complexity conditions. The effect was stable across 8 sessions (Exp 1), was obtained when age groups were equated in accuracy with criterion-referenced testing (Exp 2), and was corroborated by age-differential probabilities of error types (Exps 1 and 2). A model is proposed attributing age effects under coordinative complexity to 2 factors: (1) basic- level slowing and (2) time-consuming reiterations through the processing sequence due to age-related working memory failures. (PsycINFO Database Record (c) 2012 APA, all rights reserved)
Y1  - 1993
SN  - 0278-7393
ER  - 
TY  - JOUR
A1  - Simon, Tony
A1  - Carbrera, Angel
A1  - Kliegl, Reinhold
T1  - A new approach to the study of subitizing as distinct enumeration processing
Y1  - 1993
SN  - 0-8058- 1487-6
ER  - 
TY  - JOUR
A1  - Staudacher, Peter
T1  - New frontiers beyond context-freeness
Y1  - 1993
SN  - 90-5434-014-2
ER  - 
TY  - JOUR
A1  - Kliegl, Reinhold
A1  - Lindenberger, Ulman
T1  - Modeling intrusions and correct recall in episodic memory : adult age differences in encoding of list context
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Lindenberger, Ulman
A1  - Mayr, Ulrich
A1  - Kliegl, Reinhold
T1  - Speed and intelligence in old age
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Gienow, Wilfried
T1  - Integrating change : perspectives in english language teaching
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Jonas, Peter
A1  - Langer, Heinz
T1  - Selfadjoint extensions of a closed linear relation of defect one in a Krein space
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Louis, Alfred K.
A1  - Maaß, Peter
T1  - Contour reconstructions for 3D X-Ray CT-Images
Y1  - 1993
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  - JOUR
A1  - Pfeil, Wolfgang
A1  - Nölting, Bengt
A1  - Jung, Christiane
T1  - Apocytochrome P450cam is a native protein with some intermediate-like properties
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Pfeil, Wolfgang
T1  - Thermodynamics of apocytochrome b5 unfolding
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Pfeil, Wolfgang
A1  - Nölting, Bengt
A1  - Jung, Christiane
T1  - Thermodynmic properties of apocytochrome P450cam
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Schneider, Ingo
A1  - Müller, Bernd
A1  - Wilke, U.-B
T1  - Saisonal variation of microorganisms in a sewage farm ares south of Berlin
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Damaschun, Gregor
A1  - Damaschun, Hilde
A1  - Gast, Klaus
A1  - Misselwitz, Rolf
A1  - Müller, Jürgen J.
A1  - Pfeil, Wolfgang
A1  - Zirwer, Dietrich
T1  - Cold denaturation-induced conformational changes in phosphoglycerate kinase from yeast
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Mickler, Wulfhard
A1  - Uhlemann, Erhard
T1  - Liquid-Liquid-Extraction of copper from ammoniacal solution with cyclohexyl substituted ß-diketones
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Wollenberger, Ursula
A1  - Scheller, Frieder W.
T1  - Enzyme activation for activator and enzyme activity measurement
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Wollenberger, Ursula
A1  - Neumann, B.
A1  - Scheller, Frieder W.
T1  - Enzyme and microbial sensors for environmental Monitoring
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Lehmann, J.
A1  - Kleinpeter, Erich
T1  - 1H NMR Lanthanideinduced Shift (LIS) investigations of highly flexible molecules : a new approach
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Lehmann, J.
A1  - Kleinpeter, Erich
T1  - 1H NMR Lanthanideinduced Shift (LIS) investigations of highly flexible molecules : a new approach ; Part II
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Kleinpeter, Erich
A1  - Thomas, Steffen
A1  - Uhlig, G.
A1  - Rudorf, Wolf-Dieter
T1  - Study of the distribution of pi-Electrons in Push-Pull Alkenes by 1H an 13C NMR spectroscopy
Y1  - 1993
ER  -