385 research outputs found
Context-Aware Trajectory Prediction
Human motion and behaviour in crowded spaces is influenced by several
factors, such as the dynamics of other moving agents in the scene, as well as
the static elements that might be perceived as points of attraction or
obstacles. In this work, we present a new model for human trajectory prediction
which is able to take advantage of both human-human and human-space
interactions. The future trajectory of humans, are generated by observing their
past positions and interactions with the surroundings. To this end, we propose
a "context-aware" recurrent neural network LSTM model, which can learn and
predict human motion in crowded spaces such as a sidewalk, a museum or a
shopping mall. We evaluate our model on a public pedestrian datasets, and we
contribute a new challenging dataset that collects videos of humans that
navigate in a (real) crowded space such as a big museum. Results show that our
approach can predict human trajectories better when compared to previous
state-of-the-art forecasting models.Comment: Submitted to BMVC 201
Ricerca Sul Valore Economico Del Terzo Settore in Italia
This report summarizes the findings from a 2012 survey on the economic value of the third sector in Italy. Research includes snapshots of Italian non-profit and growth trends from recent years
Saturating linear sets of minimal rank
Saturating sets are combinatorial objects in projective spaces over finite
fields that have been intensively investigated in the last three decades. They
are related to the so-called covering problem of codes in the Hamming metric.
In this paper, we consider the recently introduced linear version of such sets,
which is, in turn, related to the covering problem in the rank metric. The main
questions in this context are how small the rank of a saturating linear set can
be and how to construct saturating linear sets of small rank. Recently, Bonini,
Borello, and Byrne provided a lower bound on the rank of saturating linear sets
in a given projective space, which is shown to be tight in some cases. In this
paper, we provide construction of saturating linear sets meeting the lower
bound and we develop a link between the saturating property and the
scatteredness of linear sets. The last part of the paper is devoted to show
some parameters for which the bound is not tight.Comment: 26 page
On the classification of low degree ovoids of
Ovoids of the Klein quadric of have been
studied in the last 40 year, also because of their connection with spreads of
and hence translation planes. Beside the classical example
given by a three dimensional elliptic quadric (corresponding to the regular
spread of ) many other classes of examples are known. First
of all the other examples (beside the elliptic quadric) of ovoids of
give also examples of ovoids of . Another important class of ovoids
of is given by the ones associated to a flock of a three dimensional
quadratic cone. To every ovoid of two bivariate polynomials
and can be associated. In this paper, we classify ovoids
of such that and
, that is
and have "low degree" compared with .Comment: Submitted to Journal of Algebraic Combinatorics. arXiv admin note:
substantial text overlap with arXiv:2203.1468
Scattered trinomials of in even characteristic
In recent years, several families of scattered polynomials have been
investigated in the literature. However, most of them only exist in odd
characteristic. In [B. Csajb\'ok, G. Marino and F. Zullo: New maximum scattered
linear sets of the projective line, Finite Fields Appl. 54 (2018), 133-150; G.
Marino, M. Montanucci and F. Zullo: MRD-codes arising from the trinomial
, Linear Algebra Appl. 591 (2020),
99-114], the authors proved that the trinomial
of is scattered under
the assumptions that is odd and . They also explicitly observed
that this is false when is even. In this paper, we provide a different set
of conditions on for which this trinomial is scattered in the case of even
. Using tools of algebraic geometry in positive characteristic, we show that
when is even and sufficiently large, there are roughly elements such that is scattered. Also, we prove that
the corresponding MRD-codes and -linear sets of
are not equivalent to the previously known ones
Exceptional scattered sequences
The concept of scattered polynomials is generalized to those of exceptional
scattered sequences which are shown to be the natural algebraic counterpart of
-linear MRD codes. The first infinite family in the first
nontrivial case is also provided and equivalence issues are considered. As a
byproduct, a new infinite family of MRD codes is obtained.Comment: 32 page
A Research Publication on the Economic Value of the Third Sector in Italy
The crisis of the welfare state as we have known it in Italy and Europe over the last few decades has forced countries and the societies of those so-called "advanced countries" to review their priorities and the methods by which social services are provided. In this way a process has begun, which reflects on how to support the organization of a renewed sense of civic responsibility, able to satisfy demand and requirements where the Public and the Market, for various reasons, are not able to provide an adequate response. The entire sector, according to the information gathered during the 8th General Census of Industry and Services carried out by Istat (the National Institute for Statistics) in 2001, adjusted in the 2003 annual report, includes: 2 5,232 non-profit institutions, equal to 5.4% of all institutional units; approximately 488,000 employees and independent workers, equal to 2.5% of all assigned workers; approximately 4 million individuals involved as volunteers 38 billion in revenue (over 3.3% of the GDP); 35 billion in costs, with a surplus of 3 billion reinvested in the activities carried out. These figures will obviously need to be updated following the growth in the world of non-profits over the last decade, but they are even more significant when accompanied by a calculation of the social savings deriving from the labour hours provided free of charge by the four million volunteers and, even more so, the material and immaterial well-being provided to those who benefited from their work, their help and their compassion. In 2012, in cooperation with IPSOS and UniCredit's Territorial Research and Strategies, UniCredit Foundation promoted and carried out an investigation into the economic value of the third sector in Italy. The study looks at the situation in the Italian non-profit sector and the growth trends registered by the sector in recent years
Heterogeneous Organizational Arrangements in Agrifood Chains: A Governance Value Analysis Perspective on the Sheep and Goat Meat Sector of Italy
In the Italian agrifood sector, one observes heterogeneity in the types of quality certification processes. This heterogeneity cannot be explained by standard governance theories like transaction costs economics (TCE). We use the governance value analysis (GVA) perspective that synthesizes TCE and a resources-based view (RBV), to suggest that the observed heterogeneity in organizational forms is a result of heterogeneous differentiating strategies that farms have pursued in the face of competitive pricing pressures. To empirically test GVA, data are obtained using a survey methodology on lamb meat produced by local farms in the Abruzzo region of Italy, challenged by price-costs squeeze. Our empirical test evidences the relevance of the adopted approach, enlightening different organizational arrangements, strictly linked to both the strategic positioning and to the farms’ resources and core competencies
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