1,721,442 research outputs found
Use of satellite images for broad-scale modelling of conservation areas for wolves in the Carpathian Mountains, central Europe
No full textThis study analysed the spatial structure of the Carpathian Mountains, in Central Europe, considering it a unit that extends across national boundaries, and assessing the suitability of areas were wolves could be conserved. Physical characteristics of the area were extracted from NOAA-AVHRR NDVI. A set of 9 images from different periods of the year was used to parameterise the phenological variability of the area. Digital maps of road networks, human settlements and a DEM were integrated in a GIS. Locations of wolf presence
were used to extract “optimal” environmental characteristics that served as reference for estimating the degree of suitability over the whole area. Results show that most of the Carpathian Mountains are highly suitable for the wolf and that highly suitable areas are actually inhabited by the present population of wolf. These are also the area most phenologically stable
An Approach to the Analysis of the CMOS Differential Stage With Active Load and Single-Ended Output
No full textThe complementary metal-oxide-semiconductor (CMOS) differential amplifier with active load and single-ended output is one of the most widespread analog building blocks in modern mixed-signal circuits for signal processing applications, because of its good performance in terms of common-mode rejection and voltage gain, combined with an extremely simple circuit structure, which performs directly differential to single-ended conversion. The authors present a straightforward approach to studying the behavior of such a simple circuit and try to explain some of its features in an intuitive way without resorting to tedious calculations. In particular, this study considers the do operating point and the common- and differential-mode voltage gains, and the results of the proposed analysis are in good agreement with those provided by both accurate analytical solution and simulation of the circuit. Among the other results, this approach emphasizes some interesting, though very often neglected, aspects of the circuit behavior
Evaluation of the Behaviour of Digital Circuits by Timed Petri Nets
No full textAn application of the Petri net formal model, augmented by inserting the notion of time, to the analysis of the time behavior of digital circuits, is presented. The modeling, simulation, and performance evaluation are examined. The results show that the Petri net model is very useful in the logic simulation of VLSI circuits as it transforms time into space (memory) complexity. Examples illustrate the way in which Petri nets can be used for evaluating the maximum time performance of a digital network
Protezione dei tunnel rispetto al rischio di incendio
No full textLa memoria contiene una sintesi dei risultati ingegneristici generali, ottenuti dal lavoro di ricerca svolto e descrive, per ciascun pacchetto di lavoro o task, le principali conclusioni tecniche, nonché le racco- mandazioni utili ad ottenere un miglioramento del comportamento strutturale dei tunnel esistenti, rispetto al rischio di incendio
Studying maths with AI: a trouble liaison for blind students
Full text linkMathematic language has always posed a complex problem for students with visual impairments. Accessibility difficulties generally concern: semantic aspects, such as understanding symbols and the statements of theorems and problems; syntactic aspects, such as transcribing mathematical language into accessible languages (e.g., braille); and spatial aspects, such as graphical representation. Over the years, numerous measures have been adopted in terms of accessibility: from the possibility of linearizing
formulas with dedicated interfaces, to accessibility standards for major application software and the web (W3C et al.). In recent years, the presence and use of generative AI represents a new frontier: through its use, it is possible to generate alternative texts that help simplify syntactic and semantic decoding and replace the use of images with effective descriptions. However, there are evident limitations that students and teachers themselves are not yet fully aware of: through this research, we aimed to show the characteristics and limitations of mainstream AI tools in the study of mathematics. With a working group of twenty-five specialized high school teachers, three types of mathematical problems were selected: an algebraic equation containing an error, a Euclidean geometry problem with a construction defect, and a geometry problem that requires different solutions, asking to justify the choices. The questions were proposed to about ten of the most popular and freely accessible AI platforms, and the results were extremely heterogeneous: each platform suggested different interpretations and versions, proposing mathematically unacceptable solutions; some isolated cases highlighted the error, but not in all questions; the same platform provides different interpretations and solutions a few hours after the first submission. This presents a certainly promising picture for the future, but not yet currently reliable as a study tool for students, blind or not, in high school and university: AI provides partial but not holistic support for the study of mathematics
Managing problem behaviours: a challenge to teacher effectiveness?
Full text linkManaging the aggressiveness of difficult students proves to be one of the most delicate and controversial aspects in schools, due to the emotional effects it produces and the practical management that sometimes risks touching thorny legal issues. Managing problem behaviors represents the true focal point of the teaching profession, touching on personal (not always conscious) and professional aspects. The Department of Human Sciences at the University of Verona collected data from seven years of training specialized support teachers, interviewing over two thousand teachers from 2016 to
2023. The use of the “TEIP” scale (Teacher Efficacy for Inclusive Practices) highlighted the levels of efficacy towards inclusive education, which are influenced by: type of training offered by the institution; level of knowledge of legislation and educational policies on inclusion; professional and personal experience of teachers in interacting with people with disabilities (Loreman, Sharma, and Forlin, 2014). In other countries involved in the survey (Australia, Hong Kong, Canada, India, China, Finland, South Africa), these three components are always present but hold different importance depending on the
culture and context in which they operate. The Italian context is no exception, but there does not yet seem to be a proactive attitude and preventive policies in this regard, although they are hoped for: often, actions are taken to address emergencies. However, from the testimonies of welcoming tutors and school principals, guidelines would be possible but are not yet formalized or official. The management of problematic and aggressive behaviors by students takes on different connotations depending on the
level of education (from primary to secondary school) and the area in which one operates (urban context with good resources, problematic suburbs, rural or mountainous areas, hinterland), revealing sometimes unexpected outcomes. This research aims to present the initial results of a longitudinal study, hypothesizing new strategies in teacher training
- …
