1,720,982 research outputs found
Il design che prima non c'era e quello che sarà
No full textThe essay goes beyond the three well-known dimensions of
time; in fact, here we consider the past as a collection of
inventions and memories, the present as the focus on what
is happening today, and the imagined future as reasonable
hypotheses. The first part, «the design that was not there»,
has the characteristic of a new trend, giving rise to many
concrete solutions. It is characterized by the following
points: the small size, the taste, the ironic vein, the minimalism,
the “handcrafted dimension of artifacts”. The second
part articulates hypotheses about the design of the future.
Bringing into play the pairing of history and historiography,
the discourse shifts to the conceptual aspect and, as
such, it winds through a series of avenues that can be listed
as follows: cultural reduction, design as mass-medium,
full-on kitsch, the work of the digital, disposability, the hypothesis
of the grotesque, the ugly makes art history
Procedura automatica per la creazione di mappe di inondazione fluviale in GRASS: il modulo r.inund.fluv
No full textThe present work proposes an automatic procedure implemented in the GIS software GRASS to define potentially fluvial inundated areas, known the conformation of the territory surrounding the river by a DTM, and the water surface profile along the river axis calculated for given discharge through an one-dimensional hydraulic model such as HEC-RAS®. The definition of perifluvial areas subject to inundation turns out to be of considerable importance either for emergency management and for planning activity, such as scheduling of works for the reduction of hydraulic risk or town planning finalized to the optimal use of such areas.
The implemented procedure has innovating characteristics; even if it remains substantially one-dimensional, it takes into account the two-dimensionality of territory and inundation phenomena, adducing hypotheses that let to correct many errors typical of one-dimensional usually employed procedure. With respect to a two-dimensional model, it has the advantage that it needs a lower computational effort, that allows to apply it to river reaches very long (of the order of 100 km).
A first validation of the procedure was performed comparing the historical inundated area and the potentially inundated area caused by the alluvial event in 1994 that interested Tanaro river; in particular, attention was focused on the reach including the Alessandria city, obtaining satisfactory results.
The new module, r.inund.fluv, is distributed under the terms of the GNU General Public License, free downloading from the web site http://grass.osgeo.org/wiki/GRASS_AddOns
Procedura automatica per la creazione di mappe di inondazione fluviale in GRASS: il modulo r.inund.fluv.
No full textA GIS tool to create fluvial flooding maps. Interaction of 1D hydrodynamic model and GIS
No full textThe present work proposes an automatic procedure implemented in GIS environment to create perifluvial flooding maps. The potentially fluvial inundated areas are obtained knowing (i) the conformation of the floodplain surrounding the river by an high resolution Digital Terrain Model (DTM) and (ii) a water surface profile along the river axis calculated for given discharge through a generic one-dimensional hydraulic model (HEC-RAS, Basement, MIKE 11, etc). The interest for the interaction between a GIS and common hydrodynamic models is shown by many works in literature and by the implementation of several software to this purpose (HEC-GeoRAS®, Mike 11 GIS and Surface water Modeling System).
The implemented procedure has innovating characteristics: in fact, even if it remains substantially one-dimensional, it takes into account the two-dimensionality of floodplain and inundation phenomena, adducing hypotheses that let to correct many errors typical of one-dimensional usually employed procedures. Hence, with respect to the use of an one-dimensional model without the GIS support, this procedure allows to obtain more realistic perifluvial flooding map. Moreover, with respect to a two-dimensional model, it needs a lower computational effort, that allows to apply it to river reaches very long (of the order of 100 km).
A first validation of the procedure was performed (Federici et al., 2007) on a reach of the Tanaro River (about 120 Km, Italy): the historical inundated area and the potentially inundated area caused by the alluvial event in 1994 that interested the river through Alessandria city were compared with satisfactory results. Recently, the tool has been applied also to a little stream (Roggia Scairolo) in the Ticino Canton, for the flooding hazard valuation (Pozzoni et al., 2009) obtaining reliable results
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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