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2000 (1)
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1995 (1)
1Author    Peter Babinec, Melánia BabincováRequires cookie*
 Title    Self-Organized Criticality and Dynamic Instability of Microtubule Growth  
 Abstract    We have shown that the distribution of lengths of site nucleated microtubules obey an algebraic power law relationship D (s) = A s~x, where D(s) is relative number of microtubules with length 5, A and i are constants. This relationship indicates the possibility of a self-organized criticality in the dynamic instability of microtubule growth. 
  Reference    Z. Naturforsch. 50c, 739—740 (1995); received May 4/July 2 1995 
  Published    1995 
  Keywords    Microtubule, Dynamics, Instability, Criticality, Self-Organization 
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 TEI-XML for    default:Reihe_C/50/ZNC-1995-50c-0739_n.pdf 
 Identifier    ZNC-1995-50c-0739_n 
 Volume    50 
2Author    Stefan Reimann, Rapporteur, JoaquinM. Fuster, Alfred Gierer, Gottfried Mayer-Kress, Titus Neumann, Pieter Roelfsem, Stefan Rotter, Gregor Schöner, Achim Stephan, Eiion Vaadia, Henrik WalterRequires cookie*
 Title    Group Report: Emergent Properties of Natural and Artificial Systems* On the Meanings of Emergence  
  Reference    Z. Naturforsch. 53c, 770—774 (1998); received April 16 1998 
  Published    1998 
  Keywords    Emergence, Pattern Formation, Self-Organization, Pre-Determinism 
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 TEI-XML for    default:Reihe_C/53/ZNC-1998-53c-0770.pdf 
 Identifier    ZNC-1998-53c-0770 
 Volume    53 
3Author    Christoph Bauer3, Thomas Burger3, Martin Stetterb, ElmarW. Lang3Requires cookie*
 Title    A Neural Network Model for the Self-Organization of Cortical Grating Cells  
 Abstract    A neural network model with incremental Hebbian learning of afferent and lateral synap­ tic couplings is proposed,which simulates the activity-dependent self-organization o f grating cells in upper layers of striate cortex. These cells, found in areas VI and V2 of the visual cortex of monkeys, respond vigorously and exclusively to bar gratings of a preferred orienta­ tion and periodicity. R esponse behavior to varying contrast and to an increasing number of bars in the grating show threshold and saturation effects. Their location with respect to the underlying orientation map and their nonlinear response behavior are investigated. The number of emerging grating cells is controlled in the model by the range and strength of the lateral coupling structure. 
  Reference    Z. Naturforsch. 55c, 282 (2000); received July 5/Decem ber 10 1999 
  Published    2000 
  Keywords    Self-Organization, Nonlinearities, Visual Cortex, (Anti-)H ebbian Learning, Lateral Plasticity 
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 TEI-XML for    default:Reihe_C/55/ZNC-2000-55c-0282.pdf 
 Identifier    ZNC-2000-55c-0282 
 Volume    55