Brane solitons of (1,0) superconformal theories in six dimensions with hypermultiplets

We solve the Killing spinor equations of 6-dimensional (1,0) superconformal theories which include hyper-multiplets in all cases. We show that the solutions preserve 1,2,3,4 and 8 supersymmetries. We find models with self-dual string solitons which are smooth and supported by instantons with an arbitrary gauge group, and 3-brane solitons as expected from the M-brane intersection rules.Comment: 13 page

Filler model based confidence measures for spoken dialogue systems: a case study for Turkish

Because of the inadequate performance of speech recognition systems, an accurate confidence scoring mechanism should be employed to understand user requests correctly. To determine a confidence score for a hypothesis, certain confidence features are combined. The performance of filler-model based confidence features have been investigated. Five types of filler model networks were defined: triphone-network; phone-network; phone-class network; 5-state catch-all model; 3-state catch-all model. First, all models were evaluated in a Turkish speech recognition task in terms of their ability to tag correctly (recognition-error or correct) recognition hypotheses. The best performance was obtained from the triphone recognition network. Then, the performances of reliable combinations of these models were investigated and it was observed that certain combinations of filler models could significantly improve the accuracy of the confidence annotatio

Does Turkish child-directed speech predict the acquisition order of wh-questions?

Does Turkish child-directed speech predict the acquisition order of wh-questions? The very early studies about children’s acquisition of questions have provided a cognition-based rationale. They claimed that “why” and “when” are acquired later than “what” and “where” because of their cognitive constraints (Bloom et al. 1982) However; in the follow-up studies, it is found that as well as cognitive perspective, there are two other explanations. One of these is the syntactic function of the wh-word, whereas the other is about the semantic generality of the main verb (Bloom et al. 1982). This point of view has highlighted the role of complexity on children’s acquisition of question. According to this; “what” and “where” are firstly acquired through the copula. Secondly, they are used with semantically general verbs. Then, wh-sententials along with descriptive verbs are used. However, this account based on that order has been challenged by Clancy’s explanation (1989). It is claimed that frequency of wh-word and verbs in child-directed speech can be a significant factor on acquisition of question (Rowland et al. 2003). In a longitudinal study with 12 English children and their mothers, it was found that input frequency of wh-questions and verb combinations was a powerful predictor when compared to linguistic complexity (Rowland et al. 2003). In the light of these discussions, the study aims at investigating Turkish child-directed speech in terms of its role on children’s acquisition of questions and at evaluating the role of cognitive/linguistic complexity account on acquisition of questions. This research was based on the naturalistic data of 9 one- to three-year old children and their mothers. References Bloom, L., Merkin, S. & Wootten, J. (1982). Wh-questions: linguistic factors that contribute to the sequence of acquisition. Child Development, 53, 1084-1092. Clancy, P. (1989). Form and function in the acquisition of Korean wh-questions. Journal of Child Language, 16, 323-347. Rowland, C., & Pine, J. (2000). Subject-auxiliary inversion errors and wh- question acquisition: what children do know? Journal of Child Language, 27, 157-181. Rowland, C., Pine, J. Lieven, E. Theakston, A. (2003). Determinants of acquisition order in wh- questions: re-evaluating the role of caregiver speech. Journal of Child Language, 30, 609-63

Geography of irreducible plane sextics

We complete the equisingular deformation classification of irreducible singular plane sextic curves. As a by-product, we also compute the fundamental groups of the complement of all but a few maximizing sextics

Spinorial geometry, horizons and superconformal symmetry in six dimensions

The spinorial geometry method of solving Killing spinor equations is reviewed as it applies to 6-dimensional (1,0) supergravity. In particular, it is explained how the method is used to identify both the fractions of supersymmetry preserved by and the geometry of all supersymmetric backgrounds. Then two applications are described to systems that exhibit superconformal symmetry. The first is the proof that some 6-dimensional black hole horizons are locally isometric to $AdS_3\times \Sigma^3$, where $\Sigma^3$ is diffeomeorphic to $S^3$. The second one is a description of all supersymmetric solutions of 6-dimensional (1,0) superconformal theories and in particular of their brane solitons.Comment: 51 pages, accepted for publication in CQG, additional references adde