We report a preliminary discussion on the usability of the RegularChains library of Maple for the automatic computation of plane geometric loci and envelopes in graphical interactive environments. We describe a simple implementation of a recently proposed taxonomy of algebraic loci, and its extension to envelopes of families of curves is also discussed. Furthermore, we sketch how currently unso...

Virtually all mail sorting machines currently used in China only recognize post code and ignore the useful destination address information on the envelopes. This paper discusses how to eciently utilize such important information on handwritten Chinese envelopes in order to improve the sorting performance. For this purpose, two particular problems are addressed, respectively. One is the locatio...

This work investigated development of operating envelopes for stabilisation/solidification (S/S) treatment, and facilitation of biodegradation within S/S treated contaminated soils, with the aim of improving the robustness and sustainability of S/S technology. The ‘process envelopes’ study utilised different conventional cementitious binders for treatment of contaminated soil, and generated ext...

The performance of two noise reduction algorithms is evaluated using 14 subjects fitted with the Clarion S-Series and Clarion II implant devices. The first algorithm, based on signal subspace principles, is used for preprocessing sentences embedded in +5 dB noise. The second algorithm is based on the subtraction of the noisy speech envelopes from an estimate of the noise envelopes. The noise en...

Any strategy and prior probability together are a coherent conditional probability that can be extended, generally not in a unique way, to a full conditional probability. The corresponding class of extensions is studied and a closed form expression for its envelopes is provided. Then a topological characterization of the subclasses of extensions satisfying the further properties of full disinte...

We present a detailed analysis of the chemical abundances, ionization state, and origin of a partial Lyman limit system (N(H I) ≈ 10 cm) at low redshift (z = 0.167 towards PKS0405−1219). We also present the first estimate of the total baryons in extended gaseous envelopes around galaxies based on a simple photoionization model for the Lyα absorbers. We find that extended gaseous envelopes can e...

We present evidence that PG1159 stars could harbour He–rich envelopes substantially thinner than those predicted by current evolutionary models with current estimates of mass loss, which may be attributable to an extensive mass–loss episode during the born–again AGB phase. Specifically, we show that the models with thin He–rich envelopes predict remarkably large magnitudes of the rates of perio...

This paper proposes a speech dereverberation method based on the MTF concept. This method can be used without measuring the impulse response of room acoustics. In the model, the power envelopes and carriers are decomposed from a reverberant speech signal using an N -channel filterbank and then are dereverberated in each respective channel. In the envelope dereverberation process, a power envelo...

We present maps at 20 resolution of the molecular emission around 18 evolved stars (14 asymptotic giant branch stars, one supergiant, two proto-planetary nebulae and one planetary nebula), mostly in the CO(3-2) line. Almost all molecular envelopes appear to be at least marginally resolved at this resolution. A substantial fraction of the molecular envelopes show clear deviations from spherical ...

A sound's duration provides important information about the event producing it. Although many of the sounds we hear every day are 'percussive' in nature (ie resulting from two objects impacting) and therefore exhibit decaying/damped amplitude envelopes, perceptual experiments frequently use tones synthesized with 'flat' or abruptly ending envelopes. Such sounds afford an estimation strategy inv...