1,453 research outputs found
ACM bundles on del Pezzo surfaces
ACM rank 1 bundles on del Pezzo surfaces are classified in terms of the
rational normal curves that they contain. A complete list of ACM line bundles
is provided. Moreover, for any del Pezzo surface of degree less or equal
than six and for any we construct a family of dimension of
non-isomorphic simple ACM bundles of rank on
The Cohen-Macaulay representation type of arithmetically Cohen-Macaulay varieties
We show that all reduced closed subschemes of projective space that have a
Cohen-Macaulay graded coordinate ring are of wild Cohen-Macaulay type, except
for a few cases which we completely classify.Comment: Completely new version. The main result now covers reducible
subschemes and cones. Many proofs have been simplified and correcte
Experiments in cooperative human multi-robot navigation
In this paper, we consider the problem of a
group of autonomous mobile robots and a human moving
coordinately in a real-world implementation. The group
moves throughout a dynamic and unstructured environment.
The key problem to be solved is the inclusion of a human in a
real multi-robot system and consequently the multiple robot
motion coordination. We present a set of performance metrics
(system efficiency and percentage of time in formation) and a
novel flexible formation definition whereby a formation
control strategy both in simulation and in real-world
experiments of a human multi-robot system is presented. The
formation control proposed is stable and effective by means of
its uniform dispersion, cohesion and flexibility
Public Health Expenditure and Spatial Interactions in a Decentralized National Health System
One of the limitations of cross-country health expenditure analysis refers to the fact that the financing, the internal organization and political restraints of health care decision-making are country-specific and heterogeneous. Yet, a potential solution is to examine the influence of such effects in those countries that have undertaken decentralization processes. In such a setting, it is possible to examine potential expenditure spillovers across the geography of a country as well as the influence of the political ideology of regional incumbents on public health expenditure. This paper examines the determinants of public health expenditure within Spanish region-states (Autonomous Communities, ACs), most of them subject to similar financing structures although exhibiting significant heterogeneity as a result of the increasing decentralization, region specific political factors along with different use of health care inputs, economic dimension and spatial interactions.political ideology, spatial interactions., health expenditure, devolution, political competition
Mol·luscs epibionts de Charonia lampas (Linnaeus, 1758) (Mollusca, Gastropoda) de la badia de Palma
Abstract not availabl
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