Search results for " Computer"
showing 10 items of 6910 documents
Early warning thresholds for partially saturated slopes in volcanic ashes
2013
Rainfall-induced landslides in steep soil slopes of volcanic origin are a major threat to human lives and infrastructure. In the context of constructing early warning systems in regions where extensive data on landslide occurrences and associated rainfall are inexistent, physically-based tools offer the possibility to establish thresholds for measurable field quantities. In this paper, a combined finite element infinite slope model is presented to study the transient hydraulic response of volcanic ash slopes to a series of rainfall events and to estimate seasonal safety factors. Furthermore, analytical considerations of partially saturated infinite slopes are made to define capillary stress…
Temari Balls, Spheres, SphereHarmonic: From Japanese Folkcraft to Music
2022
Temari balls are traditional Japanese toys and artworks. The variety of their geometries and tessellations can be investigated formally and computationally with the means of combinatorics. As a further step, we also propose a musical application of the core idea of Temari balls. In fact, inspired by the classical idea of music of spheres and by the CubeHarmonic, a musical application of the Rubik’s cube, we present the concept of a new musical instrument, the SphereHarmonic. The mathematical (and musical) description of Temari balls lies in the wide background of interactions between art and combinatorics. Concerning the methods, we present the tools of permutations and tessellations we ado…
Directionlets: Anisotropic Multidirectional representation with separable filtering
2006
In spite of the success of the standard wavelet transform (WT) in image processing in recent years, the efficiency of its representation is limited by the spatial isotropy of its basis functions built in the horizontal and vertical directions. One-dimensional (1-D) discontinuities in images (edges and contours) that are very important elements in visual perception, intersect too many wavelet basis functions and lead to a nonsparse representation. To efficiently capture these anisotropic geometrical structures characterized by many more than the horizontal and vertical directions, a more complex multidirectional (M-DIR) and anisotropic transform is required. We present a new lattice-based pe…
Un computer non più calcolatore. Linguistica e informatica
2004
La monografia analizza dal punto di vista sociocognitivo e linguistico il momento della evoluzione della percezione del computer da strumento ad ambiente di socialità, evidenziando le modifiche cognitive e sociali che comporta e la loro ricaduta nella didattica della lingua, soprattutto della lingua straniera. I tratti seminali dell'evoluzione appena visibili nel momento della pubblicazione del saggio hanno costituito la struttura del Web 2.0
Web, globalizzazione e minoranze
2007
L’espressione “apprendimento naturale” indica una liaison difficile: i due componenti del sintagma fanno riferimento a modalità glottodidattiche contrapposte, quella implicita e informale dell’acquisizione naturale e quella esplicita e formale dell’apprendimento di una L2. Essa non esprime la volontà di mettere in dubbio l’approccio naturale nell’apprendimento, ma propone di recuperare alcune modalità di conoscenza linguistica implicita proprie dell’acquisizione della L1 nella didattica della L2, estendendole, quantitativamente e qualitativamente, in modo che risultino rispettose della globalità e della sistematicità dell’acquisizione di conoscenze da parte della persona apprendente . Il su…
Apprendimento naturale, multimedialità e microlingue. Media e podcasting nella didattica linguistica.
2007
L’espressione “apprendimento naturale” indica una liaison difficile: i due componenti del sintagma fanno riferimento a modalità glottodidattiche contrapposte, quella implicita e informale dell’acquisizione naturale e quella esplicita e formale dell’apprendimento di una L2. Essa non esprime la volontà di mettere in dubbio l’approccio naturale nell’apprendimento, ma propone di recuperare alcune modalità di conoscenza linguistica implicita proprie dell’acquisizione della L1 nella didattica della L2, estendendole, quantitativamente e qualitativamente, in modo che risultino rispettose della globalità e della sistematicità dell’acquisizione di conoscenze da parte della persona apprendente . Il su…
Description of movement sensor dataset for dog behavior classification
2022
The description and results of the original investigation are found in: Dog behaviour classification with movement sensors placed on the harness and the collar, Kumpulainen, P., Valldeoriola Cardó, A., Somppi, S., Törnqvist, H., Väätäjä, H., Majaranta, P., Gizatdinova, Y., Antink, C. H., Surakka, V., V. Kujala, M., Vainio, O. & Vehkaoja, A., Aug 2021, In: Applied Animal Behaviour Science. 241, 7 p., 105393. Movement sensor data from seven static and dynamic dog behaviors (sitting, standing, lying down, trotting, walking, playing, and (treat) searching i.e. sniffing) was collected from 45 middle to large sized dogs with six degree-of-freedom movement sensors attached to the collar and the ha…
Contributions à la Vision par Ordinateur pour les Systèmes en Lumière Structurée et les Systèmes Catadioptriques
2008
Mes travaux de recherche concernent essentiellement la vision par ordinateur, ou vision artificielle. Basiquement, je me suis efforcé d'imaginer des dispositifs, d'étudier des algorithmes, d'intégrer des méthodes et techniques connues dans des méthodologies nouvelles, de développer çà et là des aspects théoriques originaux. Je me suis beaucoup intéressé à des systèmes de vision alternatifs comme les systèmes en lumière structurée ou catadioptriques. Ces systèmes permettent d'étudier les techniques usuelles de vision par ordinateur sous un éclairage différent, ils nous obligent à ajuster le problème aux caractéristiques qui leur sont propres ; ils permettent, en quelq…
AI ethics:an empirical study on the views of practitioners and lawmakers
2023
Artificial intelligence (AI) solutions and technologies are being increasingly adopted in smart systems contexts; however, such technologies are concerned with ethical uncertainties. Various guidelines, principles, and regulatory frameworks are designed to ensure that AI technologies adhere to ethical well-being. However, the implications of AI ethics principles and guidelines are still being debated. To further explore the significance of AI ethics principles and relevant challenges, we conducted a survey of 99 randomly selected representative AI practitioners and lawmakers (e.g., AI engineers and lawyers) from 20 countries across five continents. To the best of our knowledge, this is the …
Event-related brain potential markers of visual and auditory perception: A useful tool for brain computer interface systems.
2022
ObjectiveA majority of BCI systems, enabling communication with patients with locked-in syndrome, are based on electroencephalogram (EEG) frequency analysis (e.g., linked to motor imagery) or P300 detection. Only recently, the use of event-related brain potentials (ERPs) has received much attention, especially for face or music recognition, but neuro-engineering research into this new approach has not been carried out yet. The aim of this study was to provide a variety of reliable ERP markers of visual and auditory perception for the development of new and more complex mind-reading systems for reconstructing the mental content from brain activity.MethodsA total of 30 participants were shown…