1,354,827 research outputs found
Programa de diseño de componentes de infraestructuras de accesibilidad insular a través de mapeos de viaje del Paraje La Boca, Santa Fe.
No full textFil: Spitale, Sebastián. Facultad de Arquitectura, Diseño y Urbanismo; Argentina
Niche partitioning, shape of species response, and diversity in the phytobenthos across the rocky shoreline of a large peri-Alpine lake
No full textBy colonizing a particular depth zone across the transition from aquatic to terrestrial habitats, littoral species may exhibit specific physiological and ecological adaptations, as well as characteristic responses to the gradient of conditions across the ecotone. The objectives of the study were: (i) to identify the depth zone (location in relation to average water level) where the replacement of species occurs most rapidly; (ii) to test whether and to what extent the occurrence of species, their abundance and their response to the gradient evolves over time; and (iii) to assess the shape of the species' response to the gradient, calculating the niche overlap of the dominant species. Results showed that the diversity of species peaked at a depth between 18 and 48. cm, in a zone thought to be of intermediate disturbance (the transect depth was, on average, 103. cm). The main macroalgal species (the red alga, Bangia atropurpurea and the green algae, Jaoa bullata, and Cladophora glomerata), showed a variety of response shapes to the gradient: monotonic, symmetrical and skewed, depending on the stage of seasonal growth. The efficient regulation of growth of B. atropurpurea along the fluctuating gradient was interpreted as an adaptive trait giving it an advantage over more slowly reacting species. The spatial and temporal niches of B. atropurpurea and Jaoa bullata overlapped widely only in early spring, whereas later their optimal habitats were clearly differentiated. This suggested partial niche segregation between these two species, and a potential seasonal interaction. © 2012 Elsevier B.V
Urbanization effects on shoreline phytobenthos: A multiscale approach at lake extent
No full textTo understand how littoral biota respond to anthropogenic disturbances, limnologists seek to detect the scale at which patterns and processes occur. We conducted an extensive study on the shoreline phytobenthos of Lake Garda (Italy) with the following main objectives: (i) to examine the importance of urbanization for species distribution within a set of hierarchical spatial scales (101-104 m), and then (ii) to test the spatio-temporal interactions on a reduced set of scales (101-102 m, and 101-102 days). Results showed that most of the variation in most abundant species and habitat characteristics occurred at the spatial scale of 101-102 m. Species richness was positively related with microheterogeneity, but the relationship occurred only at low urbanization and not at highly-urbanized sites where artificial shores were less heterogeneous. The similarity of species assemblages was regulated by two interacting processes, one operating at a fine spatial scale (102 m), reflecting the physical-habitat requirements of the species, and the other one operating at a broader scale (104 m) in relation to the N-S nitrogen gradient. Overall, time explained 73 % of the total variation of species assemblages, space 7 %, and 20 % was explained by the interaction between space and time (the patch scale, 10s of m, and area scale, 100s of m, interacted with the finest temporal scale, 10s of days). This interaction might be explained by the process of species recruitment operating at different rates at the two spatial scales. Since the largest variation in species assemblages was at the temporal scale (due to the seasonal succession of phytobenthos), we recommend collecting at least one sample per season when monitoring littoral habitats. © 2013 Springer Basel
Introducción a la patología
No full text24 p.Fil: Spitale, Luis Santos. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Hospital Nacional de Clínicas. Cátedra de Anatomía Patológica; ArgentinaFil: Spitale, Luis Santos. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Hospital Universitario de Maternidad y Neonatología. Cátedra de Patología; Argentina.Fil: Guerini, Julio César. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Hospital Universitario de Maternidad y Neonatología. Cátedra de Patología; Argentina.Objetivos: El alumno/a deberá adquirir el concepto de patología y las áreas que abarca.Contenidos: Patología - Biopsia - Autopsia - Citología - Métodos de estudio en PatologíaFil: Spitale, Luis Santos. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Hospital Nacional de Clínicas. Cátedra de Anatomía Patológica; ArgentinaFil: Spitale, Luis Santos. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Hospital Universitario de Maternidad y Neonatología. Cátedra de Patología; Argentina.Fil: Guerini, Julio César. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Hospital Universitario de Maternidad y Neonatología. Cátedra de Patología; Argentina.Patologí
Designing Phygital Activities In a Smart Multisensorial Room: a Collaborative Cognitive Environment for Children with and without Disabilities
No full textTechnology integration in education has a great potential to transform learning paths, to overcome barriers and increase meaningful interactions among students, teachers, and the environment. Phygital learning is an emerging approach that balances the innovative technology-driven experience content with the traditional and physical one. In the context of Inclusive Education, this approach is particularly promising for enhancing the learning domains (cognitive, affective, and psychomotor) of children with disabilities. Recognized as integrators in multidisciplinary teams, characterized by a broad vision on users’ needs and experience, and familiar with the creative problemsolving process, designers can have an active role in developing new learning activities. This paper describes the development of Magika, an interactive Multisensory Environment, that supports inclusive education via playful phygital (physical + digital) activities for children with and without disabilities. 30 specialists, among product and interior designers, electronic, materials and mechanical engineers, primary educators, therapist, and caregivers, were involved in a co-design process to define the educational and therapeutic objectives of phygital activities, according to the Italian primary school education system
Patterns of beta-diversity along elevational gradients inform epiphyte conservation in alpine forests under a climate change scenario
No full textWe explored the patterns of beta-diversity of forest epiphytic bryophytes and lichens along elevational gradients to elucidate the potential impact of climate change on these functionally relevant components of the forest biota of the Alps. Eight elevational gradients were selected from a regional forest database matching the requirement of hosting spruce-dominated forests within the whole elevational range of this forest type (900â1900 m). We calculated the decay of species compositional similarity along the gradients, considering the beta diversity components, turnover and richness difference. We then assessed the importance of temperature in explaining variation in these components of beta diversity along the elevational gradients by using a distance-based redundancy analysis. Our results warn against the impact of climate change on epiphytic bryophyte and lichen communities in alpine spruce forests. This impact could be more rapid (higher rate of similarity decay) and severe for lichens, triggering species loss with temperature warming. In contrast, temperature warming is expected to cause relevant shifts in species composition to bryophyte communities, despite allowing to maintain species richness through species replacement. The contrasting mechanisms (species loss vs species replacement) by which climate influences bryophyte and lichen communities, suggest that conservation strategies should be tailored to each organism group. In particular, for bryophytes conservation efforts should be assigned to forests at each band of the elevation gradient which hosts peculiar assemblages. In contrast, for lichens priority for conservation should be assigned to forests at higher elevation that currently host the largest species pool. In this context, forest management is the primary tool available to mitigate the effect of climate change and to give a chance to delay the local extinction of several species
Understanding the natural variability of diatom assemblages in springs of the Adamello-Brenta Nature Park (south-eastern Alps) on a temporal scale
No full textIt is thought that long-term monitoring is an essential tool through which conservationists and managers (i) are alerted when the system departs from the natural state, (ii) can check their environmental policy, and (iii) can detect disturbance effects. However, while long-term studies are growing in number, the lack of information on the background rates of natural changes could lead to a biased interpretation of results. In this study we analyzed the diatom composition of yearly samples (14 -16 yrs) in four springs with the following goals: (1) to estimate the consequences of sampling-related processes on the species composition and relative abundance; (2) to determine the form of the assemblages' variation, evaluating whether the assemblages can be predicted by cyclic, directional, or stochastic changes; (3) to test if, and to what extent, the diatom variability (variation in species composition, relative abundance and diversity) on a temporal scale is driven by the environment; (4) to evaluate the degree of temporal concordance among the diatom assemblages inhabiting four springs. Results showed that because the effect of sampling was inversely proportional to the species abundances, the presence of the least abundant species over the years were mainly a result of chance. The analyses allowed us to discriminate between stochastic and directional patterns, revealing the ongoing changes in two out of four springs. Because the environmental variables did not explain a significant portion of this variability, other hypotheses are put forward. The assemblages' dynamics of species composition over time were significantly synchronous in two out of six couples of springs, and regardless of the environment. This result can suggest that internal, within springs, drivers may be more important than extrinsic forces operating over regional spatial scales. Overall, these results provide a benchmark of diatom variability over time and in natural conditions delimiting the "limits of acceptable changes". © 2011 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany
STUDIO PROSPETTICO SULL'IDENTIFICAZIONE DELLA TOMOGRAFIA A COERENZA OTTICA QUALE NUOVO BIOMARKER DELL'EVOLUZIONE DELLA SCLEROSI MULTIPLA
No full textPalustriella falcata (Brid.) Hedenas (Amblystegiaceae, Bryopsida) with pluristratose lamina: morphological variability of specimens in springs of the Italian Alps
No full textPluristratose leaf lamina in pleurocarpous aquatic mosses is a mysterious morphological character state because of its recurrence among unrelated lineages. It has been found sporadically around the world in phylogenetically distant taxa, and is thought to be a mutation and/or adaptation to aquatic habitats. During an extensive survey of bryophytes in spring habitats in the Italian Alps (Province of Trento), we found different numbers of leaf lamina cell layers among specimens of Palustriella falcata. We carried out a thorough study, measuring a set of morphological characters that identify variability among specimens within the same spring and among multiple springs. The main goals were to assess the amount of morphological variability, to quantify the concordance among morphological traits, and to test to what extent environmental variables account for morphological variability. Our results showed that, in many cases, morphological characters differed even among shoots within a spring. We found positive and significant partial correlation between pluristratose lamina and width of costa, but negative correlation between pluristratose lamina and length of cells. Constrained multivariate analysis showed that 40.3% of this morphological variation was explained by a set of environmental variables, but most importantly, we observed extensive pluristratose laminae in constantly submerged habitats. We interpreted the different numbers of cell layers in the leaf lamina as a phenotypic continuum from P. falcata, with a single layer of cells, to Palustriella pluristratosa Stech & Frahm, with a multilayered lamina. In addition we offer a point of view concerning the evolutionary significance of this trait, its possible origin, and its evolution in aquatic mosses
Towards Empathic Conversational Interaction
No full textIn recent years, "computational empathy" has emerged as a new challenging research field. Computational empathy investigates how artificial agents can manifest empathic behaviours towards the user, and how they can elicit empathy during the human-agent interaction. Such "empathic agents" have the capacity to place themselves into the emotional position of a user (or another agent), and behave taking such emotional understanding into account. The paper explores a computational empathy approach in the context of conversational interaction, and presents an empathic conversational framework grounded on the empathy theory. The framework provides a conceptual tool for designing and evaluating empathic conversational agents. Overall, our research contributes to a deeper understanding of the role of empathy in conversational interaction
- …
