Search results for "SAF"
showing 10 items of 2183 documents
Inspection Policies in Service of Fatigued Aircraft Structures
2011
Fatigue is one of the most important problems of aircraft arising from their nature as multiple-component structures, subjected to random dynamic loads. For guaranteeing safety, the structural life ceiling limits of the fleet aircraft are defined from three distinct approaches: Safe-Life, Fail-Safe, and Damage Tolerance approaches. The common objectives to define fleet aircraft lives by the three approaches are to ensure safety while at the same time reducing total ownership costs. In this paper, the damage tolerance approach is considered and the focus is on the inspection scheme with decreasing intervals between inspections. The paper proposes an analysis methodology to determine appropri…
The Rail Quality Index as an Indicator of the “Global Comfort” in Optimizing Safety, Quality and Efficiency in Railway Rails
2012
AbstractThe proposed model uses the stochastic dynamic programming and in particular Markov decision processes applied to the Rail Quality Index (RQI - Italian Indice di Qualità del Binario, IQB).By performing the integrated analysis of the classes of variables which characterize the overall service quality (in terms of comfort and safety), the proposed mathematical approach allows to find the solutions to the decision-making process in function of the probability of deterioration of the state variables of the infrastructure over time and of the flow of available resources.
On the packing sums of pairs
1993
Abstract This paper is concerned with the determination of the length of the largest interval of consecutive integers of the set hA k , where A k is a sequence of integers which is a B h -sequence.
Political Consumerism and Food Community Networks
2011
European society, with its steadily increased welfare levels, is not only concerned about food (safety, prices), but also on other aspects such as biodiversity loss, landscape degradation, pollution of water, soil and atmosphere. To a large extent these concerns can be translated into a wider concept named sustainable development defined as a normative concept by Morgan and Sonnino (2008). Sustainability in the food chain means approaching a new emerging vision of a sustainable agro-food system introducing an institutional dimension to take into account. Among different attempts to conjugate such concepts, there is one that is taking place in many Regions of Italy. In the last years spontan…
The Beauty of the Commons? Consumers Participation in Food Community Networks
2012
Why are consumers increasingly joining farmers to co-produce and transact sustainable foods world-wide? May these networks be a new tool to promote sustainable practices? As stated by Sandler (2010): “Longitudinal collective action environmental problems are likely to be effectively addressed only by an enormous number of individuals each making a nearly insignificant contribution to resolving them”. Consumers-farmers networks may serve this scope by inducing individual actors to change their preferences towards sustainable products. However participation in these networks is still not well understood. On one hand new institutional economics explains consumers joining farmers in creating a n…
Assessment of the Vegetation Parameters of Almond and Vine Plants for Designing a Compact Tractor
2018
The aim of this research is to assess the vegetation parameters of almond and vine plants, aimed at designing a compact tractor suitable for these orchards. The research is part of the Italian project TRACLAS, involving the Universities of Palermo, Milan, Bari, “Tuscia” of Viterbo and Agricultural Research and Economics - Research Unit for Agricultural Engineering (CREA-ING) of Treviglio (Bergamo). Based on the results of the surveys carried out in a sample of almond and vine farms, it was possible to define the vegetation parameters that will allow to design a very low and narrow tractor equipped with a fixed ROPS and suitable for these orchards.
TRACLAS: a project to improve under canopy tractor safety in case of overturning
2018
Poster Abstract non previsto
Compression tests of cv. Nocellara del Belice table olives for texture evaluation during storage
2014
The influence of pasteurization temperature and time of treatment on the flesh firmness and the evolution of microbial communities was studied for table olives Cv. Nocellara del Belice, packed in glass jars and processed with a tunnel pasteurizer. Pasteurization at industrial scale was carried out within a tunnel pasteurizer applying the treatment at 75 °C for 8 min in the thermal center of the jars. Besides flesh firmness and microbial evolutions, pH, total ti-tratable acidity (TTA) and colour were evaluated for the table olives during storage at 6, 12 and 15 months from packing. Table olives showed a high stability and an acceptable flesh firmness for the entire period under observation. …
Risk exposure to vibration and noise in the use of tracklaying tractors
2014
Human exposure to mechanical vibration may represent a significant risk factor for exposed workers in the agricultural sector, with particular reference to the operators driving tractors. Also noise in agriculture is one of the risk factors to be taken into account for the evaluation of workers health and safety. In particular, one of the major sources of discomfort for the workers operating a tractor is the noise to which they are subjected during work. In Italy, Law Decree 81/2008 has defined the obligations of vibration and noise assessment and risk management.The aim of this study is to evaluate the risk of exposure to whole-body vibration for the operator driving a tracklaying tractor …
Analyzing the role of soil water retention curve in slope stability for differently structured soils
2016
We analyzed the mechanical and hydrological effects of soil water retention curve (SWRC) models on the slope stability analyses of soils with unimodal and bimodal behavior. We used three different SWRC models, two bimodal models (Ross&Smettem and Dexter) vs. the traditional van Genuchten model, to evaluate the Factor of Safety (FS) of a simple designed hillslope, based on the Bishop approach for unsaturated soils. Two formulations for term were also considered. Results indicate that in cases of clayey soils, changes in FS obtained with different SWRC models especially at soil moisture values within the residual zone. In sandy soils the choice of formulations can be more important…