3,030 research outputs found
Conserve el control y mantenga la calma: el rol de las funciones ejecutivas en la regulación emocional
No full textLas emociones son respuestas de nuestro organismo esenciales para nuestra adaptación exitosa al entorno. Sin embargo, no siempre resultan de ayuda ya pueden volverse inadecuadas al contexto situacional. Se vuelve necesario un proceso complementario de regulación emocional. La regulación emocional es la capacidad de modificar nuestras emociones, especialmente en sus características de intensidad y duración en orden a cumplimentar con nuestros objetivos. Esta capacidad requiere de los recursos de funcionamiento ejecutivo para su implementación exitosa. El objetivo de este capítulo es responder a preguntas tales como ¿qué es la emoción?, ¿por qué tenemos emociones?, ¿por qué necesitamos regularlas?, ¿cómo lo hacemos?, ¿qué recursos se requieren? y ¿cómo es posible incrementar nuestra capacidad de regulación emocional?.Fil: Andrés, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Psicología Básica, Aplicada y Tecnología. Universidad Nacional de Mar del Plata. Facultad de Psicología. Instituto de Psicología Básica, Aplicada y Tecnología; ArgentinaFil: Richaud, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Centro Interdisciplinario de Investigaciones en Psicología Matemática y Experimental Dr. Horacio J. A. Rimoldi; ArgentinaFil: Introzzi, Isabel Maria. Universidad Nacional de Mar del Plata. Facultad de Psicología. Centro de Investigación en Procesos Básicos, Metodologías y Educación; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Navarro Guzmán, José Ignacio. Universidad de Cádiz; Españ
Self-Assembled Pullulan–Silica Oxygen Barrier Hybrid Coatings for Food Packaging Applications
No full textThe scope of this study encompassed the evaluation of pullulan as a suitable biopolymer for the development of oxygen barrier coatings to be applied on polyethylene terephthalate (PET), especially for food packaging applications. To enhance the oxygen barrier properties of the organic phase (pullulan) even at high relative humidity values, an inorganic phase (silica), obtained through in situ polymerization, was also utilized to obtain hybrid coatings using the sol-gel technique. Transmission electron microscopy (TEM) images and Fourier transform infrared (FT-IR) spectra showed that mixing the two phases yielded a three-dimensional hybrid network formed by self-assembly and mediated by the occurrence of new hydrogen bond interactions at the inter-molecular level, although the formation of new covalent bonds could not be excluded. The deposition of the hybrid coatings decreased the oxygen transmission rate (OTR) of the plastic substrate by up to two orders of magnitude under dry conditions. The best performance throughout the scanned humidity range (0%–80% relative humidity) was obtained for the formulation with the lowest amount of silica (that is, an organic/inorganic ratio equal to 3)
A Model For the Optical-response of Plastic Scintillator
No full textWe describe a model we have developed to understand the measured attenuation lengths of a new plastic scintillator made by Polivar, Pomezia (Italy). The model may be useful to companies and scientists developing new types of two-waveshifter scintillators
Inhibitory processes and cognitive flexibility: evidence for the theory of attentional inertia
No full textThe aim of this study was to discriminate the differential contribution of different inhibitory processes -perceptual, cognitive and behavioral inhibition- to switching cost effect associated with alternation cognitive tasks. A correlational design was used.
Several experimental paradigms (e.g., Stop signal, visual search, Stemberg´s experimental and Simon paradigm) were adapted and included in a computerized program called TAC (Introzzi & Canet Juric, 2014) to the assessment of the different cognitive processes. The final sample consisted of 45 adults (18-50 years). Perceptual and behavioral inhibition shows moderate and low correlations with attentional cost, cognitive inhibition shows no relation with flexibility and only perceptual inhibition predicts
switching costs effects, suggesting that different inhibitory processes contribute differentially to switch cost. This could be interpreted as evidence to Attentional Inertia Theory main argument which postulates that inhibition plays an essential role in the ability to flexibly switch between tasks and/or representations
Measurement of J / psi, psi-prime and upsilon total cross-sections in 800-GeV/c p - Si interactions
No full textUltrasound-assisted pullulan/Na+-montmorillonite oxygen barrier nanocomposite coatings for food packaging applications
No full textIn this paper, the preparation and characterization of oxygen barrier pullulan sodium montmorillonite (Na+-MMT) nanocomposite coatings are presented for the first time. Full exfoliation of platelets during preparation of the coating water dispersions was mediated by ultrasonic treatment, which turned out to be a pivotal factor in the oxygen barrier performance of the final material even at high relative humidity (RH) conditions [oxygen permeability coefficients ∼1.43 ± 0.39 and 258.05 ± 13.78 mL·μm·m−2·(24 h)−1·atm−1 at 23 °C and 0% RH and 70% RH, respectively]. At the micro- and nanoscale, the reasons are discussed. The final morphology of the coatings revealed that clay lamellae were stacked on top of one another, probably due to the forced confinement of the platelets within the coating thickness after solvent evaporation. This was also confirmed by modeling the experimental oxygen permeability data with the well-known Nielsen and Cussler permeation theoretical models, which suggested a reasonable aspect ratio (α) of ∼100. Electron microscopic analyses also disclosed a peculiar cell-like arrangement of the platelets. The stacking of the clay lamellae and the cell-like arrangement create the excellent oxygen barrier properties. Finally, we demonstrated that the
slight haze increase in the bionanocomposite coating materials arising from the addition of the clays depends on the clay concentration but not so much on the sonication time, due to the balance of opposite effects after sonication (an increase in the number of scattering centers but a reduction in their size)
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