McGuire, P. C., Gross, C., Wendt, L., Bonnici, A., Souza-Egipsy, V., Ormo, J., ...
(ABRIDGED) In previous work, two platforms have been developed for testing computer-vision algorithms for robotic planetary exploration (McGuire et al. 2004b,2005; Bartolo et al. 2007). The...
J. P. Lindemann, R. Kern, H. Ritter, M. Egelhaaf
For many animals, including humans, the optic flow generated on the eyes during locomotion is an important source of information about self-motion and the structure of the environment. The blowfly...
Formation and Evolution of Cataclysmic Variables (2008)
This article summarizes the basic facts and ideas concerning the formation and evolution of cataclysmic variables (CVs). It is shown why the formation of CVs must involve huge losses of mass and...
Properties of the Galactic population of cataclysmic variables in hard X-rays (2008)
Revnivtsev, M., Sazonov, S., Krivonos, R., Ritter, H., Sunyaev, R.
We measure the spatial distribution and hard X-ray luminosity function of cataclysmic variables (CVs) using the INTEGRAL all-sky survey in the 17-60 keV energy band. The vast majority of the INTEGRAL...
J. J. Steil, G. Heidemann, J. Jockusch, R. Rae, N. Jungclaus, H. Ritter
A major goal for the realization of a new generation of intelligent robots is the capability of instructing work tasks by interactive demonstration. To make such a process efficient and convenient...
Cancer detection in Breast fMRI Data (2008)
A. Meyer-bäse, P. Gruber, H. Ritter
Unsupervised clustering for biomedical time-series analysis Cancer detection in Breast fMRI Data Characterization of fMRI data Local deficits of brain perfusion
Is irradiation important for the secular evolution of low-mass X-ray binaries? (2008)
It is argued that irradiation in low-mass X-ray binaries (LMXBs) caused by accretion-generated X-rays can not only change the optical appearance of LMXBs but also their outburst properties and...
M. Tian, A. Gramm, H. Ritter, J. Schiller, R. Winter
The current Web service standard does not provide mechanisms for service offering and dynamic service selection based on QoS properties. A lot of research work related to this topic has been carried...
Properties of the galactic population of cataclysmic variables in hard X-rays (2008)
Revnivtsev, M., Sazonov, S., Krivonos, R., Ritter, H., Sunyaev, R.
c flElsevier Science Publishers B.V. (North-Holland),1992 Cascade LLM Networks (2007)
We present a new incremental cascade network architecture based on error minimization combined with "Local linear maps " (LLM) as cascaded units. The performance of the network is...
Cygnus X-2, super-Eddington mass transfer, and pulsar binaries (2007)
King Ritter Astronomy, A. R. King, H. Ritter
We consider the unusual evolutionary state of the secondary star in Cygnus X-2. Spectroscopic data give a low mass (M 2 ' 0:5 \Gamma 0:7M fi ) and yet a large radius (R 2 ' 7R fi ) and high...
Analytical Solution for the Evolution of a Binary With Stable Mass Transfer From a Giant (2007)
We derive a simple analytical solution for the evolution of a close binary with nuclear time-scale driven mass transfer from a giant. This solution is based on the well-known fact that the luminosity...
C. Weber, H. Ritter, J. Cowan, K. Obermayer
We have developed a mathematical framework to study the interplay of processes thought to be involved in the development of the retinotectal projection. Our model consists of two input layers which...
Dynamic Vision System: Modeling the prey recognition of common toads (2007)
Bufo Bufo, E. Stolte, E. Littmann, H. Ritter
The tectal structures underlying the prey-catching of toads are one of the best-known mechanisms in neurobiology. In our paper we present a simplified model of the prey recognition of the common toad...
Global Analysis Of Mass Transfer Cycles In Cataclysmic Variables (2007)
King Frank, A. R. King, U. Kolb, H. Ritter
We give a global analysis of mass transfer variations in CVs. We show that limit cycles driven by variations of the secondary star's radius alone require this radius to be sensitive to the...
Modelling Population II Cataclysmic Variables (2007)
We study the long--term evolution of cataclysmic variables (CVs) as a function of the companion star metallicity. It is shown that CVs with secondaries of low metallicity (Z=10 \Gamma4 ) which belong...
Hand Postures for Sonification Control- Extended Abstract (2007)
Thomas Hermann, Claudia Nölker, Helge Ritter, Contact Thomas Hermann, Address Thomas Hermann, ...
Sonification is a rather new technique in human-computer interaction, making usage of our auditory perception channel. Different from speech interfaces, sonification uses non-verbal sounds as the...
Bauckhage et. al.: Towards an Image Understanding Architecture for a Situated (2007)
C. Bauckhage, G. A. Fink, G. Heidemann, N. Jungclaus, F. Kummert, S. Posch, ...
e-Mail:
Visual gesture-based robot guidance with a modular neural system E. Littmann, (2007)
Abt Neuroinformatik, Fak F. Informatik, A. Drees, H. Ritter, Ag Neuroinformatik, Techn Fakultat
We report on the development of the modular neural system "SeeEagle " for the visual guidance of robot pick-and-place actions. Several neural networks are integrated to a single...
The new pre-cataclysmic binary PG 2200+085 (2006)
Shimansky, V., Sakhibullin, N. A., Bikmaev, I., Ritter, H., Suleimanov, V., Borisov, N., ...
We present the results of spectroscopic-- and orbit--sampled photometric observations of the faint UV-excess object PG 2200+085. The optical CCD photometry observations of this object were performed...
Cataclysmic binaries, LMXBs, and related objects B/cb (2006)
Cataclysmic Binaries are semi-detached binaries consisting of a white dwarf or a white dwarf precursor primary and a low-mass secondary which is filling its critical Roche lobe. The secondary is not...
Catalog of cataclysmic variables V/123A (2006)
Downes, R. A., Webbink, R. F., Shara, M. M., Ritter, H., Kolb, U., Duerbeck, H. W.
The Catalog and Atlas of Cataclysmic Variables (Edition 1: Downes & Shara; Edition 2: Downes, Webbink, & Shara) has been a valuable source of information for the cataclysmic variable community....
A catalog and atlas of cataclysmic variables : Living editon (2006)
Downes, R. A., Webbink, R. F., Shara, M. M., Ritter, H., Kolb, U., Duerbeck, H. W.
The new pre-cataclysmic binary PG 2200+085 (2006)
Shimansky, V., Sakhibullin, N. A., Bikmaev, I., Ritter, H., Suleimanov, V., Borisov, N., ...
Adaptive scene-dependent filters in online learning environments (2006)
M. Götting, J. J. Steil, H. Wersing, E. Körner, H. Ritter
Abstract. In this paper we propose the Adaptive Scene Dependent Filters (ASDF) to enhance the online learning capabilities of an object recognition system in real-world scenes. The ASDF method...
Adaptive scene-dependent filters in online learning environments (2006)
M. Götting, J. J. Steil, H. Wersing, E. Körner, H. Ritter
Abstract. In this paper we propose the Adaptive Scene Dependent Filters (ASDF) to enhance the online learning capabilities of an object recognition system in real-world scenes. The ASDF method...
Marion Wardermann, Prof Dr, H. Ritter, Dr. J. Steil
ii Hiermit erkläre ich, dass ich die vorliegende Arbeit selbstständig verfasst und keine anderen als die angegebenen Quellen und Hilfsmittel verwendet habe. Bielefeld, der 28. Juli 2006 Marion...
Numerical stability of mass transfer driven by Roche lobe overflow in close binaries (2005)
Numerical computation of the time evolution of the mass transfer rate in a close binary can be and, in particular, has been a computational challenge. Using a simple physical model to calculate the...
Multi-Modal Human-Machine Communication for Instructing Robot Grasping Tasks (2005)
McGuire, P. C., Fritsch, J., Steil, J. J., Roethling, F., Fink, G. A., Wachsmuth, S., ...
A major challenge for the realization of intelligent robots is to supply them with cognitive abilities in order to allow ordinary users to program them easily and intuitively. One way of such...
Catalog of cataclysmic variables V/123 (2005)
Downes, R. A., Webbink, R. F., Shara, M. M., Ritter, H., Kolb, U., Duerbeck, H. W.
The Catalog and Atlas of Cataclysmic Variables (Edition 1: Downes & Shara; Edition 2: Downes, Webbink, & Shara) has been a valuable source of information for the cataclysmic variable community....
Cataclysmic binaries, LMXBs, and related objects B/cb (2005)
Cataclysmic Binaries are semi-detached binaries consisting of a white dwarf or a white dwarf precursor primary and a low-mass secondary which is filling its critical Roche lobe. The secondary is not...
Cataclysmic binaries, LMXBs, and related objects V/113D (2005)
Cataclysmic Binaries are semi-detached binaries consisting of a white dwarf or a white dwarf precursor primary and a low-mass secondary which is filling its critical Roche lobe. The secondary is not...
Ritter, H., Steffens, C., Storsberg, J.
Styrene was encapsulated by an equimolar amount of randomly methylated beta-cyclodextrin (CD) in water resulting in a water-soluble CD complex. Polymerization of this complex was carried out at 50...
Task-oriented quality measures for dextrous grasping (2005)
R. Haschke, J. J. Steil, I. Steuwer, H. Ritter
Abstract — We propose a new and efficient approach to compute task oriented quality measures for dextrous grasps. Tasks can be specified as a single wrench to be applied, as a rough direction in...
Neural Architectures for Robot Intelligence (2004)
Ritter, H., Steil, J. J., Noelker, C., Roethling, F., McGuire, P. C.
We argue that the direct experimental approaches to elucidate the architecture of higher brains may benefit from insights gained from exploring the possibilities and limits of artificial control...
RXTE broadband X-ray spectra of intermediate polars and white dwarf mass estimates (2004)
Suleimanov, V., Revnivtsev, M., Ritter, H.
We present results of an analysis of broadband spectra of 14 intermediate polars obtained with the RXTE observatory (PCA and HEXTE spectrometers, 3-100 keV). By means of our calculations of the...
Long-term evolution of compact binaries with irradiation feedback (2004)
We resume the discussion about irradiation-driven mass transfer cycles in semi- detached compact binary systems. The analytical model that describes the onset of these cycles, which occur on a...
Cataclysmic binaries, LMXBs, and related objects V/113C (2004)
Cataclysmic Binaries are semi-detached binaries consisting of a white dwarf or a white dwarf precursor primary and a low-mass secondary which is filling its critical Roche lobe. The secondary is not...
Cyborg Systems as Platforms for Computer-Vision Algorithm-Development for Astrobiology (2004)
McGuire, Patrick C., Rodriguez-Manfredi, J. A., Sebastian-Martinez, E., Gomez-Elvira, J., Diaz-Martinez, E., Ormo, J., ...
Employing the allegorical imagery from the film "The Matrix", we motivate and discuss our `Cyborg Astrobiologist' research program. In this research program, we are using a wearable computer and...
Performance Considerations for Mobile Web Services (2004)
M. Tian, T. Voigt, T. Naumowicz, H. Ritter, J. Schiller
Web services are an emerging technology that provides a flexible platform for web interaction. We evaluate Web service performance of handheld resource-constrained clients using different wireless...
Efficient Selection and Monitoring of QoS-aware Web services with the WS-QoS Framework (2004)
M. Tian, A. Gramm, H. Ritter, J. Schiller
While the concept of UDDI supports the automatic discovery of services implementing a common public tModel interface, there have been only few attempts to find a standardized form to describe the...
M. Tian, A. Gramm, H. Ritter, J. Schiller, T. Voigt
Abstract: QoS issues will play an important role for the success of Web services. With the increasing number of mobile devices consuming Web services, specific QoS mechanisms are required for the...
Till Bovermann, Prof Dr, H. Ritter, Dr. T. Hermann, Till Bovermann
with Application
Efficient Selection and Monitoring of QoS-aware Web services with the WS-QoS Framework (2004)
M. Tian, A. Gramm, H. Ritter, J. Schiller
While the concept of UDDI supports the automatic discovery of services implementing a common public tModel interface, there have been only few attempts to find a standardized form to describe the...
Performance Considerations for Mobile Web Services (2004)
M. Tian, T. Voigt, T. Naumowicz, H. Ritter, J. Schiller
Web services are an emerging technology that provides a flexible platform for web interaction. We evaluate Web service performance of handheld resource-constrained clients using different wireless...
Theis,A., Menges,B., Mittler,Silvia, Mierzwa,M., Pakula,Tadeusz, Ritter,H.
Photosensitive mesoionic polymers in which the polymerizable methacrylic group is attached to the malonic acid component of the mesoionic function were prepared and characterized. Dielectric...
Cataclysmic binaries, LMXBs, and related objects V/113A (2003)
Cataclysmic Binaries are semi-detached binaries consisting of a white dwarf or a white dwarf precursor primary and a low-mass secondary which is filling its critical Roche lobe. The secondary is not...
Tonami,H., Uyama,H., Kobayashi,S., Menges,B., Mittler,Silvia, Theis,A., ...
This study deals with synthesis of a polyphenol bearing photosensitive groups, and its photochemical behavior upon UV radiation. Mesoionic...
The catalogue lists coordinates, apparent magnitudes, orbital parameters, and stellar parameters of the components and other characteristc properties of 472 cataclysmic binaries, 71 low-mass X-ray...
The catalogue lists coordinates, apparent magnitudes, orbital parameters, and stellar parameters of the components and other characteristc properties of 472 cataclysmic binaries, 71 low-mass X-ray...
Tonami, H., Uyama, H., Kobayashi, S., Menges, B., Mittler, Silvia, Theis, A., ...
This study deals with synthesis of a polyphenol bearing photosensitive groups, and its photochemical behavior upon UV radiation. Mesoionic...
Theis, A., Menges, B., Mittler, Silvia, Mierzwa, M., Pakula, Tadeusz, Ritter, H.
Photosensitive mesoionic polymers in which the polymerizable methacrylic group is attached to the malonic acid component of the mesoionic function were prepared and characterized. Dielectric...
A Concept for QoS Integration in Web Services (2003)
Tian Gramm Naumowicz, M. Tian, A. Gramm, T. Naumowicz, H. Ritter, J. Schiller
With the growing popularity of Web services, a general QoS support for Web services will play an important role for the success of this emerging technology. Unfortunately, current Web service...
Performance Considerations for Mobile Web Services (2003)
Tian Voigt Naumowicz, M. Tian, T. Voigt, T. Naumowicz, H. Ritter, J. Schiller
Web services are an emerging technology that provides a flexible platform for web interaction. We evaluate Web service performance of handheld resource-constrained clients using different wireless...
Learning issues in a multi-modal robot-instruction scenario (2003)
J. J. Steil, F. Röthling, R. Haschke, H. Ritter
Abstract — One of the challenges for the realization of future intelligent robots is to design architectures which make user instruction of work tasks by interactive demonstration effective and...
Renvoizé, V., Baraffe, I., Kolb, U., Ritter, H.
Based on SPH simulations, we quantify the geometrical distortion effect due to tidal and rotational forces on polytropic secondaries in semi-detached binaries. The main effect is an expansion of the...
Renvoize, V., Baraffe, I., Kolb, U., Ritter, H.
Based on SPH simulations, we quantify the geometrical distortion effect due to tidal and rotational forces on polytropic secondaries in semi-detached binaries. The main effect is an expansion of the...
Theis,A., Ritter,H., Böhme,F., Klinger,C., Mittler,Silvia, Menges,B.
A polymeric amidine prepared by melt condensation was converted to a photosensitive polymesoion by a polymer analogous condensation reaction with methylmalonic acid. The polymeric mesoion was...
Heinenberg,M., Menges,B., Mittler,Silvia, Ritter,H.
Various vinylbenzaldehydes were prepared using the Heck reaction: 4-vinylbenzaldehyde (14), 3-vinylbenzaldehyde (15), 2-vinylbenzaldehyde (18a), 2-hydroxy-4-vinylbenzaldehyde (16) and...
Catalog of cataclysmic variables V/110 (2002)
Downes, R. A., Webbink, R. F., Shara, M. M., Ritter, H., Kolb, U., Duerbeck, H. W.
The Catalog and Atlas of Cataclysmic Variables (Edition 1: Downes & Shara; Edition 2: Downes, Webbink, & Shara) has been a valuable source of information for the cataclysmic variable community....
Renvoize, V., Baraffe, I., Kolb, U., Ritter, H.
Based on SPH simulations, we quantify the geometrical distortion effect due to tidal and rotational forces on polytropic secondaries in semi-detached binaries. The main effect is an expansion of the...
A source of high-velocity white dwarfs (2002)
Davies, M. B., King, A., Ritter, H.
We investigate whether the recently observed population of high-velocity white dwarfs can be derived from a population of binaries residing initially within the thin disc of the Galaxy. In...
Formation of the binary pulsars J1141-6545 and B2303+46 (2002)
Davies, M. B., Ritter, H., King, A.
The binaries PSR J1141-6545 and PSR B2303+46 each appear to contain a white dwarf that formed before the neutron star. We describe an evolutionary pathway to produce these two systems. In this...
Theis, A., Ritter, H., Böhme, F., Klinger, C., Mittler, Silvia, Menges, B.
A polymeric amidine prepared by melt condensation was converted to a photosensitive polymesoion by a polymer analogous condensation reaction with methylmalonic acid. The polymeric mesoion was...
Heinenberg, M., Menges, B., Mittler, Silvia, Ritter, H.
Various vinylbenzaldehydes were prepared using the Heck reaction: 4-vinylbenzaldehyde (14), 3-vinylbenzaldehyde (15), 2-vinylbenzaldehyde (18a), 2-hydroxy-4-vinylbenzaldehyde (16) and...
Multi-modal human-machine communication for instructing robot grasping tasks (2002)
P. Mcguire, J. Fritsch, J. J. Steil, F. Röthling, G. A. Fink, S. Wachsmuth, ...
A major challenge for the realization of intelligent robots is to supply them with cognitive abilities in order to allow ordinary users to program them easily and intuitively. One way of such...
A source of high-velocity white dwarfs (2001)
Davies, M. B., King, A. R., Ritter, H.
We investigate whether the recently-observed population of high-velocity white dwarfs can be derived from a population of binaries residing initially within the thin disk of the Galaxy. In particular...
On the spin-up of neutron stars to millisecond pulsars in long-period binaries (2000)
We study the accretion efficiency of neutron stars in long-period binaries, i.e. with periods longer than about 200d, which accrete from a giant companion. Using alpha-disc models and taking into...
Irradiation and mass transfer in low-mass compact binaries (2000)
We study the reaction of low-mass stars to anisotropic irradiation and its importance for the long-term evolution of compact binaries binaries. We show by means of a simple homology model that if the...
Principal curve sonification (2000)
T. Hermann, P. Meinicke, H. Ritter
This paper describes a new approach to render sonifications for high-dimensional data, allowing the user to perceive the “main” structure of the data distribution. This is achieved by computing...
Sonification of Multi-Channel Image Data (2000)
T. Hermann, Neuroinformatics Group, T. W. Nattkemper, H. Ritter, W. Schubert
This paper presents a method to inspect multi-channel image data by creating audible sonications, which are `sound images', computed from a stack of image data. While visualization of...
Principal Curve Sonification (2000)
T. Hermann, P. Meinicke, H. Ritter
This paper describes a new approach to render sonifications for high-dimensional data, allowing the user to perceive the "main" structure of the data distribution. This is achieved by...
T. W. Nattkemper, H. Wersing, H. Ritter, Neuroinformatics Group, W. Schubert
A neural network architecture for the automatic evaluation of uorescence microscopy images of tissue samples is presented. One image is segmented into regions of uorescent lymphocyte cell bodies and...
Analytical solution for the evolution of a binary with stable mass transfer from a giant (1999)
We derive a simple analytical solution for the evolution of a close binary with nuclear time-scale driven mass transfer from a giant. This solution is based on the well-known fact that the luminosity...
The Chemical Pollution of the Secondary of a Cataclysmic Variable By Novae (1999)
We study the chemical evolution of population I and population II secondaries in cataclysmic variables (CVs) assuming that during nova explosions a part of the high metallicity nova ejecta is...
Listen to your Data: Model-Based Sonification for Data Analysis (1999)
Sonification is the use of non-speech audio to convey information. We are developing tools for interactive data exploration, which make use of sonification for data presentation. In this paper,...
Ritter And, M. Hasenjager, H. Ritter, K. Obermayer
tive data selection is computationally expensive, but may reduce the number of necessary dissimilarities by more than a factor of two compared to a random selection strategy. This makes active data...
Listen to your Data: Model-Based Sonification for Data Analysis (1999)
Sonification is the use of non-speech audio to convey information. We are developing tools for interactive data exploration, which make use of sonification for data presentation. In this paper,...
Cygnus X-2, super-Eddington mass transfer, and pulsar binaries (1998)
We consider the unusual evolutionary state of the secondary star in Cygnus X-2. Spectroscopic data give a low mass ($M_2 \simeq 0.5 - 0.7\msun$) and yet a large radius ($R_2 \simeq 7\rsun$) and high...
The CV period gap: still there (1998)
Kolb, U., King, A. R., Ritter, H.
We consider a recently-proposed alternative explanation of the CV period gap in terms of a revised mass-radius relation for the lower main sequence. We show that no such thermal-equilibrium relation...
Transients Among Binaries with Evolved Low-Mass Companions (1997)
King, A. R., Frank, J., Kolb, U., Ritter, H.
We show that stable disk accretion should be very rare among low-mass X-ray binaries and cataclysmic variables whose evolution is driven by the nuclear expansion of the secondary star on the first...
Mass Transfer Cycles in Close Binaries with Evolved Companions (1997)
King, A. R., Frank, J., Kolb, U., Ritter, H.
We give a global analysis of mass transfer variations in low-mass X-ray binaries and cataclysmic variables whose evolution is driven by the nuclear expansion of the secondary star. We show that limit...
The Joint Development of Orientation and Ocular Dominance: Role of Constraints (1997)
C. Piepenbrock, H. Ritter, K. Obermayer
this paper.
Illumination in binaries (1996)
We give a simple, but accurate method that can be used to account for illumination in compact binary systems which have a low-mass companion, even if spherically symmetric illumination of the...
Robot Guidance by Human Pointing Gestures (1996)
E. Littmann, Abt Neuroinformatik, H. Ritter, Fak F. Informatik, A. Drees, Ag Neuroinformatik, ...
In the search for intuitive man-machine interfaces the visual recognition of human gestures would provide a powerful means to guide robot movements. In our paper we report on the development of the...
Breaking Knapsack Cryptosystems by l_infinity norm Enumeration (1996)
At EUROCRYPT '94 G. Orton proposed a public key cryptosystem based on dense compact knapsacks. We present an efficient depth first search enumeration of l 1 --norm short lattice vectors based on...
Representing Procedural Knowledge for Semantic Networks using Neural Nets (1995)
R. Moratz, G. Heidemann, S. Posch, H. Ritter, G. Sagerer
Interpretation of complex scenes involves analysing multiple objects being composed of several parts. Since different objects often have parts in common it is useful to share resources representing...
A Hybrid System to Detect Hand Orientation in Stereo Images (1994)
A. Drees, F. Kummert, E. Littmann, S. Posch, H. Ritter, G. Sagerer
The recognition of hands and the 3-dimensional characterization of hand orientation is a difficult and practically important vision problem. In this work we propose a hybrid system attaching...
A Hybrid System to Detect Hand Orientation in Stereo Images (1994)
A. Drees, F. Kummert, E. Littmann, S. Posch, H. Ritter, G. Sagerer
this paper is an extension of previous research ([1,2]) where monocular images are used as input. This system is further developed to utilize depth information acquired from stereo images. In the...
Generalization Abilities of Cascade Network Architectures (1993)
In [5], a new incremental cascade network architecture has been presented. This paper discusses the properties of such cascade networks and investigates their generalization abilities under the...
Cascaded and Parallel Neural Network Architectures for Machine Vision - A Case Study (1992)
E. Littmann, A. Meyering, H. Ritter
this paper is to focus on a case study of a prototypical task of shape identification. We use this task to compare parallel and cascaded network architectures as a tool for the construction of...
Cascade Network Architectures (1992)
Introduction It is well known that the classification and approximation capabilities of single layer perceptrons are restricted to linearly separable problems [8]. To overcome these limitations,...
xv, 446 p. :
A principle for the formation of the spatial structure of cortical feature maps.
Obermayer, K, Ritter, H, Schulten, K
Orientation-selective cells in the striate cortex of higher animals are organized as a hierarchical topographic map of two stimulus features: (i) position in visual space and (ii) orientation. We...
Nearby stop codons in exons of the neurofibromatosis type 1 gene are disparate splice effectors.
Hoffmeyer, S, Nürnberg, P, Ritter, H, Fahsold, R, Leistner, W, Kaufmann, D, ...
Stop mutations are known to disrupt gene function in different ways. They both give rise to truncated polypeptides because of the premature-termination codons (PTCs) and frequently affect the...
A principle for the formation of the spatial structure of cortical feature maps.
Obermayer, K, Ritter, H, Schulten, K
Orientation-selective cells in the striate cortex of higher animals are organized as a hierarchical topographic map of two stimulus features: (i) position in visual space and (ii) orientation. We...
Nearby stop codons in exons of the neurofibromatosis type 1 gene are disparate splice effectors.
Hoffmeyer, S, Nürnberg, P, Ritter, H, Fahsold, R, Leistner, W, Kaufmann, D, ...
Stop mutations are known to disrupt gene function in different ways. They both give rise to truncated polypeptides because of the premature-termination codons (PTCs) and frequently affect the...
Development and regeneration of the retinotectal map in goldfish: a computational study
Weber, C., Ritter, H., Cowan, J., Obermayer, K.
We present a simple computational model to study the interplay of activity-dependent and intrinsic processes thought to be involved in the formation of topographic neural projections. Our model...