4,235 research outputs found
Poetical potentials: the value of poems in social impact education
The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.For the technologist it is easy to remain in safe technological enclaves with a bespoke language, a community of like minds and a familiar knowledge base. However, progress requires pushing the boundaries, thinking beyond the traditional and the ordinary, and questioning accepted norms. It requires opening of minds. It may surprise the reader that poetry can offer the key to unlock the closed mind. This potential is explored through a variety of poems dealing, in a novel manner, with the social impact of technology
On Restricted Nonnegative Matrix Factorization
Nonnegative matrix factorization (NMF) is the problem of decomposing a given
nonnegative matrix into a product of a nonnegative matrix and a nonnegative matrix . Restricted NMF
requires in addition that the column spaces of and coincide. Finding
the minimal inner dimension is known to be NP-hard, both for NMF and
restricted NMF. We show that restricted NMF is closely related to a question
about the nature of minimal probabilistic automata, posed by Paz in his seminal
1971 textbook. We use this connection to answer Paz's question negatively, thus
falsifying a positive answer claimed in 1974. Furthermore, we investigate
whether a rational matrix always has a restricted NMF of minimal inner
dimension whose factors and are also rational. We show that this holds
for matrices of rank at most and we exhibit a rank- matrix for which
and require irrational entries.Comment: Full version of an ICALP'16 pape
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Cross-eyed - cross-spectral iris/periocular recognition database and competition
This work presents a novel dual-spectrum database containing both iris and periocular images synchronously captured from a distance and within a realistic indoor environment. This database was used in the 1st Cross-Spectrum Iris/Periocular Recognition Competition (Cross-Eyed 2016). This competition aimed at recording recent advances in cross- spectrum iris and periocular recognition. Six submissions were evaluated for cross-spectrum periocular recognition, and three for iris recognition. The submitted algorithms are briefly introduced. Detailed results are reported in this paper, and comparison of the results is discussed
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