Comunicación USB para aplicaciones de control con Matlab® / Simulink® y placa ESD-32U

En el Laboratorio de Control de la Facultad de Ingeniería de la UNCuyo ha sido de gran ayuda para investigación y desarrollo, el uso de placas de interfaz, aptas para aplicaciones de control en tiempo real. Poseen una sección digital de 8 entradas y 8 salidas, mientras que en la sección analógica poseen 8 entradas y 2 salidas de 8 bits de resolución. Estas placas conseguían su comunicación con la PC a través de un puerto ISA, obsoletos al día de hoy. Por lo que la propuesta fue utilizar placas nacionales de bajo costo con comunicación USB, desarrollando el software de interfaz entre las mismas con los programas MATLAB® / Simulink® que corriendo en tiempo real controlaran plantas pilotos, máquinas y robots, como sus antecesoras conectadas a la PC vía bus ISA. En este trabajo se presentan los principales resultados de lo realizado hasta el momento.Sociedad Argentina de Informática e Investigación Operativ

A transposon-mediate inactivation of a CYCLOIDEA-like gene originates polysymmetric and androgynous ray flowers in Helianthus annuus

n several eudicots, including members of the Asteraceae family, the CYCLOIDEA (CYC) genes, which belong to the TCP class of transcription factors, are key players for floral symmetry. The sunflower inflorescence is heterogamous (radiate capitulum) with sterile monosymmetric ray flowers located in the outermost whorl of the inflorescence and hermaphrodite polysymmetric disk flowers. In inflorescence of Heliantheae tribe, flower primordia development initiates from the marginal ray flowers while disk flowers develop later in an acropetal fashion in organized parastichies along a number found to be one of Fibonacci patterns. Mutants for inflorescence morphology can provide information on the role of CYC-like genes in radiate capitulum evolution. The tubular ray flower (turf) mutant of sunflower shows hermaphrodite ray flowers with a nearly polysymmetric tubular-like corolla. Here, we demonstrate that this mutation is caused by the insertion in the TCP motif of a sunflower CYC-like gene (HaCYC2c) of non-autonomous transposable element (TE), belonging to the CACTA superfamily of transposons. We named this element Transposable element of turf1 (Tetu1). The Tetu1 insertion changes the reading frame of turf-HaCYC2c for the encoded protein and leads to a premature stop codon. Although in Tetu1 a transposase gene is lacking, our results clearly suggest that it is an active TE. The excision of Tetu1 restores the wild type phenotype or generates stable mutants. Co-segregation and sequence analysis in progenies of F(2) and self-fertilized plants derived from reversion of turf to wild type clearly identify HaCYC2c as a key regulator of ray flowers symmetry. Also, HaCYC2c loss-of-function promotes the developmental switch from sterile to hermaphrodite flowers, revealing a novel and unexpected role for a CYC-like gene in the repression of female organs

Exploring the contribution of prosody and gesture to the perception of focus using an animated agent

Speech prosody has traditionally been analyzed in terms of acoustic features. Although visual features have been shown to enhance linguistic processing, the conventional view is that facial and body gesture information in oral (non-signed) languages tends to be redundant and has the role of helping the hearer recover the meaning of an utterance. Though prosodic information in face-to-face communication is produced with concurrent visual information, little is known about their audiovisual multisensory interactions. We conducted two perception experiments modeled after the McGurk paradigm with a 3D animated character, in which varying degrees of discordance between auditory and visual information were created to investigate two related questions regarding the detection of contrastive-corrective focus: (a) how important are gestural cues with respect to auditory cues and (b) what is the relevance of the different gestural movements involved (i.e., head nodding, eyebrow raising)? Participants were presented with combinations of auditory and visual cues for both information and Contrastive Focus Statements (Experiment 1, with the corresponding unimodal control experiments) or combinations of two visual cues (namely combinations of competing eyebrow and head movements) without auditory information (Experiment 2), and were asked to identify whether the utterance presented was a statement or a correction. Results of Experiment 1 showed that (a) the presence of either acoustic or gestural features of contrastive focus were key in guiding the listener towards one interpretation or another, and (b) listeners were more sensitive to one of the modalities when the other was weaker. Results of Experiment 2 showed that (a) both types of visual cues (head and eyebrow movements) contributed individually to the perception of contrastive focus, and (b) head nods were more informative than eyebrow movements for focus identification. Overall, our findings suggest that prosodic and visual information work in a complementary fashion and are not integrated in the same way as auditory and visual information during segmental perception.A preliminary version of this article was presented at Interspeech 2011 (Florence, August 27–31). We are grateful to the audience at that conference, and especially to David House, for very helpful comments. We are particularly indebted to Aurora Bel for her help in recruiting participants for the experimental sessions and to Javier Agenjo for his assistance with the NINOs platform. This research was supported by the following grants: BFU2012-31995 and TIN2008-05995 Learn3 CICYT (awarded by the Spanish Ministry of Science and Innovation), 2014 SGR 925 (Generalitat de Catalunya), and iMP (European Union 7th Framework project). The second author also acknowledges a MAEC-AECID Grant (Spanish Ministry of Foreign Affairs and Cooperation)