Ofer Matan - Academia.edu (original) (raw)

Papers by Ofer Matan

Research paper thumbnail of On Voting Ensembles of Classifiers (Extended Abstract)

... Keywords: Ensembles, Multiple Models, Boosting, Majority Gates, Voting Committees, Classi cat... more ... Keywords: Ensembles, Multiple Models, Boosting, Majority Gates, Voting Committees, Classi cation, Representation. ... In ensembleE1, the upper left quadrant is classi ed cor-rectly by all ensemble members while all other quad-rants are classi ed correctly by only one ensemble ...

Research paper thumbnail of COMMENT: Scaling properties of diffusion on comb-like structures

J Phys a Math Gen, 1989

The authors study the scaling properties of the probability density of random walks on comb-like ... more The authors study the scaling properties of the probability density of random walks on comb-like structures. They find that, in contrast to the first-passage time, in which several exponents are needed to characterise their distribution, the probability density can be described by a single exponent.

Research paper thumbnail of Mean first-passage time on loopless aggregates

Physical Review a General Physics, Dec 1, 1989

We study the mean first-passage time (MFPT) for random walks on the backbone of loopless aggregat... more We study the mean first-passage time (MFPT) for random walks on the backbone of loopless aggregates. We derive an exact expression for the MFPT on a general aggregate model. The exact MFPT for several deterministic and random disordered structures is calculated. We find that, in general, the exponent τ(1) describing the asymptotic dependence of the MFPT on the linear size of the system for diffusion is τ(1)=1+df, where df is the fractal dimension of the aggregate.

Research paper thumbnail of Method and apparatus for image segmentation

Research paper thumbnail of Home and home occupant remote monitoring and communication system

Research paper thumbnail of Graphical system for automated segmentation and recognition for image recognition systems

Research paper thumbnail of Staff scheduling for inbound call centers and customer contact centers

The staff scheduling problem is a critical problem in the call center (or more generally, custome... more The staff scheduling problem is a critical problem in the call center (or more generally, customer contact center) industry. This paper describes Director, a staff scheduling system for contact centers, Director is a constraint-based system that uses AI search techniques to generate schedules that satisfy and optimize a wide range of constraints and service quality metrics. Director has been successfully

Research paper thumbnail of Method and apparatus for multi-contact scheduling

Research paper thumbnail of Deformable and elastic tensile-integrity structure

Research paper thumbnail of Method and apparatus for skill based scheduling in a call centre

Research paper thumbnail of Method and system for concurrent error identification in resource scheduling

Research paper thumbnail of Staff Scheduling for Inbound Call and Customer Contact Centers

Ai Magazine, 2002

The staff scheduling problem is a critical problem in the call center (or more generally, custome... more The staff scheduling problem is a critical problem in the call center (or more generally, customer contact center) industry. This paper describes Director, a staff scheduling system for contact centers. Director is a constraint-based system that uses AI search techniques to generate schedules that satisfy and optimize a wide range of constraints and service quality metrics. Director has been successfully deployed at over 800 contact centers, with significant measurable benefits, some of which are documented in case studies included in this paper.

Research paper thumbnail of Method and apparatus for long range planning

Research paper thumbnail of Recognizing Overlapping Hand-Printed Characters by Centered-Objects Integrated Segmentation and Recognition

International Joint Conference on Neural Networks, 1991

Research paper thumbnail of Staff Scheduling for Inbound Call Centers and Customer Contact Centers

The staff scheduling problem is a critical problem in the call center (or more generally, custome... more The staff scheduling problem is a critical problem in the call center (or more generally, customer contact center) industry. This paper describes Director, a staff scheduling system for contact centers, Director is a constraint-based system that uses AI search techniques to generate schedules that satisfy and optimize a wide range of constraints and service quality metrics. Director has been successfully deployed at over 800 contact centers, with significant measurable benefits, some of which are documented in case studies included in this paper.

Research paper thumbnail of Handwritten character recognition using neural networks

Handbook of Neural Computation, 1997

Research paper thumbnail of A neural network approach to handprint character recognition

COMPCON Spring '91 Digest of Papers, 1991

Ned-net methods, which rely on highly interconnected arrays of simple processing elements, have d... more Ned-net methods, which rely on highly interconnected arrays of simple processing elements, have demonstrated state-of-the-art performance (both speed and accuracy) in optical character recognition (OCR). The networks can be emulated in software, or can be implemented in specialpurpose hardware for added speed. This paper outlines OCR technology developed at AT&T Bell Laboratories, including a recognition network that learns feature extraction kernels, and a custom Wl chip that is designed for neural-net image processing.

Research paper thumbnail of Mean first-passage time on loopless aggregates

Physical Review A, 1989

We study the mean first-passage time (MFPT) for random walks on the backbone of loopless aggregat... more We study the mean first-passage time (MFPT) for random walks on the backbone of loopless aggregates. We derive an exact expression for the MFPT on a general aggregate model. The exact MFPT for several deterministic and random disordered structures is calculated. We find that, in general, the exponent tau(1) describing the asymptotic dependence of the MFPT on the linear size of the system for diffusion is tau(1)=1+df, where df is the fractal dimension of the aggregate.

Research paper thumbnail of Recognizing Overlapping Hand-Printed Characters by Centered-Objects Integrated Segmentation and Recognition

Research paper thumbnail of Properties of noninteger moments in a first passage time problem

Journal of Statistical Physics, 1989

We calculate the moments (tq), where q is not necessarily an integer, of the first passage time t... more We calculate the moments (tq), where q is not necessarily an integer, of the first passage time to trapping for a simple diffusion problem in one dimension. If a characteristic length of the system is L and (I q) ~ L v(ql as L --* 09, then we show that there is a phase transition at q = qc such that when q < qc, z(q) = O, and for q > qc, z(q) is a linear function of q. These analytical results can be used to explain results for large moments for diffusion on a hierarchic structure. We also show how to calculate noninteger moments in terms of characteristic functions.

Research paper thumbnail of On Voting Ensembles of Classifiers (Extended Abstract)

... Keywords: Ensembles, Multiple Models, Boosting, Majority Gates, Voting Committees, Classi cat... more ... Keywords: Ensembles, Multiple Models, Boosting, Majority Gates, Voting Committees, Classi cation, Representation. ... In ensembleE1, the upper left quadrant is classi ed cor-rectly by all ensemble members while all other quad-rants are classi ed correctly by only one ensemble ...

Research paper thumbnail of COMMENT: Scaling properties of diffusion on comb-like structures

J Phys a Math Gen, 1989

The authors study the scaling properties of the probability density of random walks on comb-like ... more The authors study the scaling properties of the probability density of random walks on comb-like structures. They find that, in contrast to the first-passage time, in which several exponents are needed to characterise their distribution, the probability density can be described by a single exponent.

Research paper thumbnail of Mean first-passage time on loopless aggregates

Physical Review a General Physics, Dec 1, 1989

We study the mean first-passage time (MFPT) for random walks on the backbone of loopless aggregat... more We study the mean first-passage time (MFPT) for random walks on the backbone of loopless aggregates. We derive an exact expression for the MFPT on a general aggregate model. The exact MFPT for several deterministic and random disordered structures is calculated. We find that, in general, the exponent τ(1) describing the asymptotic dependence of the MFPT on the linear size of the system for diffusion is τ(1)=1+df, where df is the fractal dimension of the aggregate.

Research paper thumbnail of Method and apparatus for image segmentation

Research paper thumbnail of Home and home occupant remote monitoring and communication system

Research paper thumbnail of Graphical system for automated segmentation and recognition for image recognition systems

Research paper thumbnail of Staff scheduling for inbound call centers and customer contact centers

The staff scheduling problem is a critical problem in the call center (or more generally, custome... more The staff scheduling problem is a critical problem in the call center (or more generally, customer contact center) industry. This paper describes Director, a staff scheduling system for contact centers, Director is a constraint-based system that uses AI search techniques to generate schedules that satisfy and optimize a wide range of constraints and service quality metrics. Director has been successfully

Research paper thumbnail of Method and apparatus for multi-contact scheduling

Research paper thumbnail of Deformable and elastic tensile-integrity structure

Research paper thumbnail of Method and apparatus for skill based scheduling in a call centre

Research paper thumbnail of Method and system for concurrent error identification in resource scheduling

Research paper thumbnail of Staff Scheduling for Inbound Call and Customer Contact Centers

Ai Magazine, 2002

The staff scheduling problem is a critical problem in the call center (or more generally, custome... more The staff scheduling problem is a critical problem in the call center (or more generally, customer contact center) industry. This paper describes Director, a staff scheduling system for contact centers. Director is a constraint-based system that uses AI search techniques to generate schedules that satisfy and optimize a wide range of constraints and service quality metrics. Director has been successfully deployed at over 800 contact centers, with significant measurable benefits, some of which are documented in case studies included in this paper.

Research paper thumbnail of Method and apparatus for long range planning

Research paper thumbnail of Recognizing Overlapping Hand-Printed Characters by Centered-Objects Integrated Segmentation and Recognition

International Joint Conference on Neural Networks, 1991

Research paper thumbnail of Staff Scheduling for Inbound Call Centers and Customer Contact Centers

The staff scheduling problem is a critical problem in the call center (or more generally, custome... more The staff scheduling problem is a critical problem in the call center (or more generally, customer contact center) industry. This paper describes Director, a staff scheduling system for contact centers, Director is a constraint-based system that uses AI search techniques to generate schedules that satisfy and optimize a wide range of constraints and service quality metrics. Director has been successfully deployed at over 800 contact centers, with significant measurable benefits, some of which are documented in case studies included in this paper.

Research paper thumbnail of Handwritten character recognition using neural networks

Handbook of Neural Computation, 1997

Research paper thumbnail of A neural network approach to handprint character recognition

COMPCON Spring '91 Digest of Papers, 1991

Ned-net methods, which rely on highly interconnected arrays of simple processing elements, have d... more Ned-net methods, which rely on highly interconnected arrays of simple processing elements, have demonstrated state-of-the-art performance (both speed and accuracy) in optical character recognition (OCR). The networks can be emulated in software, or can be implemented in specialpurpose hardware for added speed. This paper outlines OCR technology developed at AT&T Bell Laboratories, including a recognition network that learns feature extraction kernels, and a custom Wl chip that is designed for neural-net image processing.

Research paper thumbnail of Mean first-passage time on loopless aggregates

Physical Review A, 1989

We study the mean first-passage time (MFPT) for random walks on the backbone of loopless aggregat... more We study the mean first-passage time (MFPT) for random walks on the backbone of loopless aggregates. We derive an exact expression for the MFPT on a general aggregate model. The exact MFPT for several deterministic and random disordered structures is calculated. We find that, in general, the exponent tau(1) describing the asymptotic dependence of the MFPT on the linear size of the system for diffusion is tau(1)=1+df, where df is the fractal dimension of the aggregate.

Research paper thumbnail of Recognizing Overlapping Hand-Printed Characters by Centered-Objects Integrated Segmentation and Recognition

Research paper thumbnail of Properties of noninteger moments in a first passage time problem

Journal of Statistical Physics, 1989

We calculate the moments (tq), where q is not necessarily an integer, of the first passage time t... more We calculate the moments (tq), where q is not necessarily an integer, of the first passage time to trapping for a simple diffusion problem in one dimension. If a characteristic length of the system is L and (I q) ~ L v(ql as L --* 09, then we show that there is a phase transition at q = qc such that when q < qc, z(q) = O, and for q > qc, z(q) is a linear function of q. These analytical results can be used to explain results for large moments for diffusion on a hierarchic structure. We also show how to calculate noninteger moments in terms of characteristic functions.