Search results for "Integra"
showing 10 items of 5314 documents
Positivity, complex FIOs, and Toeplitz operators
2018
International audience; We establish a characterization of complex linear canonical transformations that are positive with respect to a pair of strictly plurisubharmonic quadratic weights. As an application, we show that the boundedness of a class of Toeplitz operators on the Bargmann space is implied by the boundedness of their Weyl symbols.
Classification and non-existence results for weak solutions to quasilinear elliptic equations with Neumann or Robin boundary conditions
2021
Abstract We classify positive solutions to a class of quasilinear equations with Neumann or Robin boundary conditions in convex domains. Our main tool is an integral formula involving the trace of some relevant quantities for the problem. Under a suitable condition on the nonlinearity, a relevant consequence of our results is that we can extend to weak solutions a celebrated result obtained for stable solutions by Casten and Holland and by Matano.
Factors affecting Nigerian teacher educators’ technology integration : Considering characteristics, knowledge constructs, ICT practices and beliefs
2020
To provide a diverse comprehension of teachers' TPACK (Technological, Pedagogical, and Content Knowledge) and how TPACK is reflected in practice, this study examined teacher educators' (TEs') conceptions of technology integration. Specifically, the main objective of the study was to investigate the factors influencing Nigerian teacher educators' technology integration using a self-completion survey administered to Nigerian teacher educators from three schools in the southern region of Nigeria. We utilized the partial least squares structural equation modeling (PLS-SEM) approach for the data analysis. Two frameworks—TPACK and Second Information Technology in Education Study (SITES)— guided t…
On an Inequality for Trigonometric Polynomials In Several Variables
1990
Publisher Summary This chapter presents trigonometric polynomials in n variables. Using the methods of approximation theory, an inequality can be extended to almost periodic functions and to still more general classes of functions as in the case for Bohr's inequality. However, no analogous result exists in the case of two variables. For the solution of problems containing small divisors, the estimate has to be completed by theorems concerning the best approximation of holomorphic functions by trigonometric polynomials in polystrips. The chapter also presents equations to provide an estimate for a differential operator.
Characterisation of clayey raw materials for ceramic manufacture in ancient Sicily
2011
Abstract It is well known that mineralogical, petrographic and chemical analyses can successfully support provenance studies of archaeological ceramics. The characterisation of a ceramic paste, the assessment of its technology of production and its provenance assignment related to a specific production centre or to a geographical and/or compositional space, are all tasks that can be performed even more accurately if the clayey raw materials used in pottery production are also studied. For that reason the identification of the clay deposits exploited in a given ceramic workshop often plays a key role in the archaeometric reconstruction of the production cycle where geology, mineralogy, petro…
Transformations Toward Mature Thinking: Challenges for Education and Learning
2012
In this chapter, adult cognitive development and its transformation are explored in the context of a rapidly changing postmodern world. This chapter presents and describes three models of adult cognitive development and their educational implications. The models presented are Basseches’ model of dialectical thinking, Kuhn’s model of epistemological development, and Baxter Magolda’s model of the development of self-authorship. These models are described in greater detail because they present advanced forms of adult cognitive development but also because of the challenge they pose to educational practices. These models open possibilities for understanding educational practices and learning es…
MINIMALIST THEORY OF FICTION AND THE ICTHINKING® METHOD AS A BACKGROUND FOR NEW INSIGHTS TO AUTISM
2021
The standard approach to conceptual understanding in the case of autism uses the distinction of abstract versus concrete thinking. This approach has its benefits but fails to explain all features of language use. For example, some concepts change their meaning in different contexts in contrast to concepts that are more rigid in their uses, such as mathematical concepts. This idea has its background in Minimalist theory of fiction (MTF), a theory that considers ‘skills to use words’ essential for understanding fiction, contrasting with theories that require pretending or make believe to understand fiction. From this background, the theory of Integrative Complexity (IC), and the method animat…
Modelling Spatial Memory
2018
Among the different capabilities of animals, the formation of spatial memories is crucial for their life. Living beings able to move, constantly need to orient themselves in the environment to reach a target that might be not always visible. This chapter investigates the process of spatial memory formation as an essential ingredient for orientation in open and unstructured environments. Neural centres devoted to spatial memory and path integration were deeply investigated both in rats and different insect species like ants, bees and fruit flies. In this chapter a neural-inspired model for the formation of a spatial working memory is discussed considering some key elements of the insect neur…
Toward a better understanding and conceptualization of affect self-regulation through music : A critical, integrative literature review
2016
Research on the affective phenomena involved in music has grown exponentially over the last 20 years. One particular topic is the use of music for affect self-regulation (i.e., the process of creating, changing, or maintaining affective states). Being a recent field of research, knowledge remains scattered and heterogeneous. An integrative literature review was conducted to present the results from recent research and critically analyse its overall conceptual state. A systematic search of online databases focusing on publications from January 1994 to June 2014 was completed. An extensive screening resulted in the selection of 34 publications, which were analysed with regard to their focus,…
Private Pre-University Education in Romania
2014
This paper approaches private provision of pre-university education in Romania, exploring available data on the sector's size and main characteristics and evaluating the extent to which the current regulatory framework enables positive effects in terms of freedom of choice, quality, equity, and social cohesion. The paper argues that the lack of a clear strategy mixed with strict control in key areas and lax implementation of support instruments has led to private providers not being a legitimate alternative to public education.