Browsing CAS/CNS Technical Reports by Title

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Browsing CAS/CNS Technical Reports by Title

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  • Zalama, Eduardo; Gaudino, Paolo; Coronado, Juan López (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1995-02)
    This paper describes the application of a model of operant conditioning to the problem of obstacle avoidance with a wheeled mobile robot. The main characteristic of the applied model is that the robot learns to avoid ...
  • Przybyszewski, A. W.; Lankheet, M. J. M.; van de Grind, W.A. (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1994-10)
    We recorded intracellular responses from cat retinal ganglion cells to sinusoidal flickering lights and compared the response dynamics to a theoretical model based on coupled nonlinear oscillators. Flicker responses for ...
  • Beck, Jacob (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 2000-09)
  • Caglayan, Alper K.; Snorrason, Magnus (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1993-01)
    In this paper, we introduce the Generalized Equality Classifier (GEC) for use as an unsupervised clustering algorithm in categorizing analog data. GEC is based on a formal definition of inexact equality originally developed ...
  • Grossberg, Stephen (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1994-07)
  • Lehar, Steven (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1993-01)
    An extension to the Boundary Contour System model is proposed to account for boundary completion through vertices with arbitrary numbers of orientations, in a manner consistent with psychophysical observartions, by way of ...
  • Lehar, Steven (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1993-01)
    An extension to the orientational harmonic model is presented as a rotation, translation, and scale invariant representation of geometrical form in biological vision.
  • Rinkus, Gerard J. (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1993-01)
    The proposed model, called the combinatorial and competitive spatio-temporal memory or CCSTM, provides an elegant solution to the general problem of having to store and recall spatio-temporal patterns in which states or ...
  • Rubin, Mark A.; Cohen, Michael A.; Luciano, Joanne S.; Samson, Jacquelin A. (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1998-06)
    Although effective drug and non-drug treatment for unipolar depressive illness exist, different individuals respond differently to different treatments. It is not uncommon for a given patient to lw switched several times ...
  • Neumann, Heiko (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1994-01)
    In this contribution a neural architecture is proposed that serves as a framework for further empirical as well as modeling investigations into a unified theory for contrast, contour and lnightncss perception. The computational ...
  • Cohen, Michael A.; Grossberg, Stephen (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1996-10)
    A neural model of peripheral auditory processing is described and used to separate features of coarticulated vowels and consonants. After preprocessing of speech via a filterbank, the model splits into two parallel channels, ...
  • Pessoa, Luiz; Beck, Jacob; Mingolla, Ennio (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1995-03)
    An element-arrangement pattern is composed of two types of elements that differ in the ways in which they are arranged in different regions of the pattern. We report experiments on the perceived segregation of chromatic ...
  • Mingolla, Ennio; Todd, James T.; Norman, J. Farley (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1991-12)
    How do human observers perceive a coherent pattern of motion from a disparate set of local motion measures? Our research has examined how ambiguous motion signals along straight contours are spatially integrated to obtain ...
  • Pessoa, Luiz; Mingolla, Ennio; Arend, Larry (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1995-08)
    Lightness constancy requires the visual system to somehow "parse" the input scene into illumination and reflectance components. Experiments on the perception of lightness for 3-D curved objects show that human observers ...
  • Dresp, Birgitta; Durand, Séverine; Grossberg, Stephen (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1999-11)
    The experiments reported herein probe the visual cortical mechanisms that control near-far percepts in response to two-dimensional stimuli. Figural contrast is found to be a principal factor for the emergence of percepts ...
  • Guenther, Frank H.; Gjaja, Marin N. (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1995-10)
    The perceptual magnet effect is one of the earliest known language-specific phenomena arising in infant speech development. The effect is characterized by a warping of perceptual space near phonemic category centers. ...
  • Cunningham, Robert; Beck, Jacob; Mingolla, Ennio (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1998-12)
    Visual search is extended from the domain of polygonal figures presented on a uniform field to photo-realistic scenes containing target objects in dense, naturalistic backgrounds. The target in a trial is a computer-rendered ...
  • Gaudiano, Paolo; Mejia-Monasterio, Norma (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1996-04)
  • Polimeni, Jonathan; Granquist-Fraser, Domhnull; Wood, Richard; Schwartz, Eric (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 2005-01)
    Neurons in macaque primary visual cortex are spatially arranged by their global topographic position and in at least three overlapping local modular systems: ocular dominance columns, orientation pinwheels, and cytochrome ...
  • Grossberg, Stephen (Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems, 1996-02)
    This chapter summarizes a neural model of how humans use pitch-based information to separate and attentively track multiple voices or instruments in distinct auditory streams, as in the cocktail party problem. The model ...

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