Many visible and infrared sampled imaging systems suffer from moderate to severe amounts of aliasing. The problem arises because the large optical apertures required for sufficient light gathering ability result in large spatial cutoff frequencies. In consumer grade cameras, images are often undersampled by a factor of twenty times the suggested Nyquist rate. Most consumer cameras employ birefr...

Forwarding pointers allow safe and efficient data migration. However, they also introduce a new source of aliasing and as a result can have a serious impact on program performance. In this paper we introduce short quasi-unique ID’s (squids), a simple hardware mechanism for capability architectures that mitigates the problems associated with aliasing. In the common case, squids can be used to pr...

A number of proposals to manage aliasing in Java-like programming languages have been advanced over the last five years. It is not clear how practical these proposals are, that is, how well they relate to the kinds of programs currently written in Java-like languages. To address this problem, we analysed heap snapshots from a corpus of Java programs. Our results indicate that object-oriented pr...

3 Sampling 12 3.1 Time and Frequency Domain Analysis . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.2 Aliasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.3 The Nyquist Theorem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.4 Anti-Aliasing Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

UNLABELLED Redundancy among sequence identifiers is a recurring problem in bioinformatics. Here, we present a rapid and efficient method of fingerprinting identifiers to ascertain whether two or more aliases are identical. A number of tools and approaches have been developed to resolve differing names for the same genes and proteins, however, these methods each have their own limitations associ...

This work investigates the information loss in a decimation system, i.e., in a downsampler preceded by an antialiasing filter. It is shown that, without a specific signal model in mind, the anti-aliasing filter cannot reduce information loss, while, e.g., for a simple signal-plus-noise model it can. For the Gaussian case, the optimal anti-aliasing filter is shown to coincide with the one obtain...

Hard sync”, a form of oscillator synchronization, is a technique which synthesizes a characteristic rich family of sounds. We describe how to perform it by integrating a bandlimited impulse pattern, avoiding the unpleasant aliasing heard in a naive digital rendering. The synthesis is refined by using a minimum-phase bandlimited step function, which eliminates lookahead and integration. This ide...