373 research outputs found
Modeling farmer participation to a revenue insurance scheme by means of Positive Mathematical Programming
No full textEuropean farmers face increasing income uncertainty and the debate is growing on the role of insurance schemes and of public support in this field. This debate is further stimulated by the perspective of introducing instruments to cope with risk also in the Common Agricultural Policy. Therefore, there is a need for empirical analysis and tools aimed at providing empirical evidences on this subject. This paper applies a PMP modelling approach that takes into explicit consideration risk aversion behaviour to test the possibility to use it to assess the implications of participating in a insurance scheme. This is done by introducing a revenue insurance scheme into a model developed on a small group of crop farms in Italy. In particular, a quadratic mix integer programming approach has been developed in order to model the choice of participating or not in the proposed insurance scheme. The model has been than used to conduct simulations considering changes in the level of the insurance premium. The paper tries to assess the soundness of the proposed approach and to identify its limitations. The obtained results suggest that this could be a useful tool to investigate the impact of participating in insurance schemes on production patterns and farm profitability and the role of public support in this field.insurance schemes, PMP, farmers’ participation, risk aversion, non-linear mix-integer programming, Farm Management, Risk and Uncertainty, Q12, C61, Q18,
Frontmatter, Table of Contents, Preface, Conference Organization
No full textFrontmatter, Table of Contents, Preface, Conference Organizatio
Severini e Denis
No full textL'A. prende in esame i controversi rapporti tra i due artisti, nel primo decennio del secolo e, più tardi, nella produzione di carattere religioso. Severini risulta influenzato da Denis più di quanto sostenga negli scritti teorici. The Author examines the controversial relationships between the two artists, in the first decade of the century and later on, in their religious production. Severini appears influenced by Denis more than he declares in his theoretic writings
The Role of the Common Agricultural Policy in Enhancing Farm Income: A Dynamic Panel Analysis Accounting for Farm Size in Italy
No full textThe impact of reforming the Common Agricultural Policy on the sustainability of the irrigated area of Central Italy. An empirical assessment by means of a Positive Mathematical Programming model
No full textThe Common Agricultural Policy (CAP) is a major driver of the environmental and social sustainability of the agriculture in the European Union (EU). Under the 2003 CAP reform, most direct payments to agricultural producers were decoupled from production. This work assesses the possible impact of the CAP reform on the sustainability of an irrigated area of Central Italy with particular attention being paid to decoupling. The analysis has been conducted using the Positive Mathematical Programming (PMP) method that directly estimates the cost function parameters by imposing the first-order conditions of the farm model under consideration. The analysis assesses the impact of the CAP reform on farm cropping patterns, water and chemical use, labour use and economic results. By referring to this set of indicators it is possible to investigate the likely effect of the CAP reform on the environmental, social and economic sustainability of the considered farming systems. The results of the empirical analysis mainly show a reduction in water and chemical input use, an increase in the economic results of farms, but also a reduction of the labour.Common Agricultural Policy, Sustainability, Positive Mathematical Programming, Farmers’ behaviour, Irrigated agriculture, Decoupling, Agricultural and Food Policy, Consumer/Household Economics, Crop Production/Industries, Demand and Price Analysis, Farm Management, Land Economics/Use,
Synergy-Dependent Center-of-Mass Control Strategies During Sit-to-Stand Movements
No full textThe characterization, through the concept of muscle synergies, of clinical functional tests is a valid tool that has been widely adopted in the research field. While this theory has been exploited for a description of the motor control strategies underlying the biomechanical task, the biomechanical correlate of the synergistic activity is yet to be fully described. In this paper, the relationship between the activity of different synergies and the center of mass kinematic patterns has been investigated; in particular, a group of healthy subjects has been recruited to perform simple sit-to-stand tasks, and the electromyographic data has been recorded for the extraction of muscle synergies. An optimal model selection criterion has been adopted for dividing the participants by the number of synergies characterizing their own control schema. Synergistic activity has then been mapped onto the phase-space description of the center of mass kinematics, investigating whether a different number of synergies implies the exploration of different region of the phase-space itself. Results show how using an additional motor module allow for a wider trajectory in the phase-space, paving the way for the use of kinematic feedback to stimulate the activity of different synergies, with the aim of defining synergy-based rehabilitation or training protocols
The Quantum Separability Problem for Gaussian States
No full textDetermining whether a quantum state is separable or entangled is a problem of fundamental importance in quantum information science. This is a brief review in which we consider the problem for states in infinite dimensional Hilbert spaces. We show how the problem becomes tractable for a class of Gaussian states
Scienza S.P.A. : Appunti su ricerca e innovazione
No full textCosa definisce la scienza oggi e in che modo
si lega alla tecnologia? Come finanziare la
ricerca? C’è un modo ideale per divulgarla?
E per renderla utile? Il volume muove da
domande operative con un tono accessibile
a chiunque condivida la curiosità di riflettere
sull’interfaccia tra scienza e tecnologia,
arricchito da opinioni e aneddoti di persone
esperte. Con uno sguardo da imprenditori
metascientifici, gli autori si preoccupano di
trovare giusti equilibri tra profitto e verità,
obiettivi egocentrici e valori collettivi, essere
umano e macchina. Due sfide ne emergono.
Rinnovare come la scienza viene fatta, tramite
il ripensamento del paradigma dell’articolo
scientifico e dei metodi di finanziamento alla
ricerca. E gestire la transizione da una scienza
edificata principalmente da persone a una
ibrida, sospinta dalle macchine, intese come
assistenti con alcune capacità più-che-umane
Effects of the Income Stabilization Tool on farm income level, variability and concentration in Italian agriculture.
No full textSeverini S., Di Tommaso G., Finger R. (2019). Effects of the Income Stabilization Tool on farm income level, variability and concentration in Italian agriculture. Agricultural and Food Economics. 7:23. Page:1-22. https://doi.org/10.1186/s40100-019-0141-9
- …
