The study of the physical process of light interacting with matter is an important part of computer image synthesis since it forms the basis for calculations of intensities in the picture. The simpler models used in the past are being augmented by more complex models…
An inexpensive two-quadrant analog voltage divide can be built using an operational transconductance amplifier. The design can be useful in analog tunable and tracking filters and special-purpose modulators and demodulators.
Despite a casual interest in civilian cryptography going back to its origins (see the discussion of [36]), this is my only publication in the field. It presents a cute hack for using a single password to login to a system multiple times without allowing an…
An iterative method for computing shape from shading using occluding boundary information is proposed. Some applications of this method are shown. We employ the stereographic plane to express the orientations of surface patches, rather than the more commonly used gradient space. Use of the stereographic…
This paper describes an algorithm for compressing the spectral representation of an utterance along the time axis while keeping the main features intact. The goal of the algorithm is to save template storage space and to reduce the time required for recognition. For 8 speakers,…
Simple active filters are used here to build a continuously-adjustable parametric equalizer having the same general response as the popular Baxandall circuit, which uses a switch-selectable scheme for bass and treble equalization.
This paper presents an analysis of Walker's "current dumping" technique, which combines feedback and feedforward to significantly reduce nonlinearity distortions in Class B amplifiers. Current dumping is thus a good alternative to Class AB designs, as it avoids biasing circuits that may need careful adjustment…
Presented here for a speaker dependent system, is an algorithm which chooses a reference template for each word in the vocabulary from a set of N exemplars. The goal of the algorithm is to produce a reference set that minimizes the worst matching behavior and…
This paper describes a notation for the formal specification of software packages. The main influences are the guarded commands of Dijkstra and the Algebraic Semantics of Guttag. However, a novel operator denoted by % is introduced, which allows algorithms to be abstracted in a specification,…
A new class of all-pole filter functions, derived from the least-squares approximation technique, is introduced. The magintude response is compared with other all-pole filters, like the Butterworth, LSM, and Chebyshev ones. The three subclasses of the new class seem to be a suitable choice for…
We decompose the problem of concurrency control into the sub-problems of read-write and write-write synchronization. We present a series of timestamp-based algorithms (called synchronization techniques) that achieve read-write and/or write-write synchronization. And we show how to combine any read-write technique with any write-write technique to…
