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contribution deals with a generative approach for the analysis of textual data.
Instead of creating heuristic rules forthe representation
of documents and word counts, we employ a distribution able to model words
along texts considering different topics. In this regard, following Minka
proposal (2003), we implement a Dirichlet Compound Multinomial (DCM) distribution, then we propose an
extension called sbDCM that takes
explicitly into account the different latent topics that compound the document.
We follow two alternative approaches: on one hand the topics can be unknown,
thus to be estimated on the basis of the data, on the other hand topics are
determined in advance on the basis of a predefined ontological schema. The two
possible approaches are assessed on the basis of real data.
This study presents the results of forward numerical
models of a series of sections of the Aurora Trench (East Antarctica) derived
from radio echo-sounding data that allowed to reconstruct the 3D shape of the
Aurora Fault, a crustal listric normal fault characterized by a length
exceeding 100 km. A similar extensional fault setting allows to replicate the asymmetric
buried morphology of the magnetic basement at the Lake Vostok depression
derived by the available gravity and magnetic profiles. Both the Aurora and
Vostok listric fault reach their basal decollment at 34 km depth, possibly the
base of the crust in this intracratonic environment. Integration of these
results with the existing geologic interpretations of the tectonic origin of
the Concordia Trench by normal faulting allowed to frame the Concordia, Aurora
and Vostok normal faults within an intraplate transtensional corridor with a
left-lateral movement component. The westward projection of the proposed
strike-slip deformation belt may develop in correspondence of an older tectonic
lineament stretching from the Eastern flanks of the Gamburtsev Subglacial Mts
to the Lambert rift and characterized by a poly-phased complex tectonic
history. The possible Cenozoic reactivation of these structures is discussed in
This paper is about creativity and innovation in the educational field. Through
a literature review, we describe
the results of two decades of research on creativity and innovation in the educational
and organizational field, to underline
what seemed to work and what did not, to enable these processes functioning effectively. In this literature review, a search
of publications dealing with the issues of innovation and creativity and the links between these two issues
has been made. We decided to put these studies in four theoretical, ex-post created, dimensions: organizational structures, individual
characteristics, training methods and pedagogical practices and training content.
The content of this article is based on one of the outputs of the European Commission
funded project, named CLEAR (Creativity and innovation: pedagogical framework for
the learning chain).