Magdalena Skrzypiec

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In this paper we define a certain generalization of isoptic curves. We call the new curves secantoptics, since we use secants to construct them. We extend to secantoptics some properties of isoptics known from [1] and [6]. At the end we discuss other generalizations of isoptics and relations between them. MSC 2000: 53A04, 53C44
Automatic recognition of multiple musical instruments in polyphonic and polytimbral music is a difficult task, but often attempted to perform by MIR researchers recently. In papers published so far, the proposed systems were validated mainly on audio data obtained through mixing of isolated sounds of musical instruments. This paper tests recognition of(More)
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