2,515 research outputs found
DESIGN SISTEMICO E TERRITORIO. Progettare relazioni virtuose tra agricoltura, produzione energetica e modelli di consumo.Allegato A CIBO E TERRITORIO Scenari progettuali per Giaveno
The current consumption model identifies the base of the well-being of individuals and the community itself as the possession of property. The idea of development generated is a quantitative model, strongly backed by the economic system, and it does not matter what you consume as long as the outcome results in an increase in demand. Agriculture is no exception, as well as other sectors of the economy ,it results subject to strict laws of supply and demand: the food has slowly transformed into an industrial product, on the one hand becoming increasingly affordable and abundant, but on the other more standard and approved. The intensification of production has necessitated the large-scale use of pesticides and antibiotics in order to consistently meet the quantity and esthetic standards required by the market. Concepts such as seasonality and typicality have been altered, getting the consumers used to have any product anywhere and any time. This has modified our relationship with food: we eat more than we need, we buy more than we can consume, These shortcomings lead to our actions and behaviors that cause the waste and the disposal of a huge quantity of edible food, and separating our choices from their effects on health and territory, leading to the consolidation of a pattern of consumption that is not sustainable environmentally, socially and economically. If we consider that food chains are one of the sectors most energy-intensive and polluting, it follows that the current pattern of consumption can no longer be socially, environmentaly and economically consolidated and supported. On the other hand, the very close link between agriculture, energy and health represents a new starting point for designing a model of virtuous life and conscious, capable of generating culture and wellness. For nearly a decade, however, new realities, that have sought to find a different way of acting, are developing in a new economy which can create fertile ground for a local sustainable development. The purpose of our work is to define, through the analysis of different case studies, new scenarios of possible development, which can create new positive relationship between the protagonists of the system, and in which the flows of energy and matter constitute new resources and opportunities for the territory
New Model OF consumption: scenarios for sustainability
The current consumption model identifies the base of the well-being of individuals and the community itself as the possession of property. Agriculture is no exception; as well as other sectors of the economy, it is subject to strict laws of supply and demand: food has slowly transformed into an industrial product, on the one hand becoming increasingly affordable and abundant, but on the other more standard and approved. In addition, if we consider that food chains are one of the most energy-intensive and polluting sectors, it follows that the current pattern of consumption can no longer be socially, environmentally and economically consolidated and supported. The purpose of our work is to define, through the analysis of different case studies, new scenarios of possible development, which can create new positive relationships between the protagonists of the system, and in which the flows of energy and matter constitute new resources and opportunities for the territor
On the electromagnetic energy resolution of Cherenkov-fiber calorimeters
Electromagnetic calorimeters which sample the Cherenkov radiation of shower particles in optical fibers operate in a markedly different manner from calorimeters which rely on the dE/dx of shower particles. The well-understood physics of electromagnetic shower development is applied to the case of Cherenkov-fiber calorimetry (also known as quartz fiber calorimetry) and the results of systematically performed studies are considered in detail to derive an understanding of the critical parameters involved in energy measurement using such calorimeters. A quantitative parameterization of Cherenkov-fiber calorimetry electromagnetic energy resolution is proposed and compared with existing experimental results
Study of an innovative joining solution for the wheel system
The objective of this thesis research is to develop an adhesive bonding solution in order to remove the classic welding technology exploited nowadays in the automotive steel wheel system.
The examined solution is an hybrid joint, based on adhesive boding combined with the presence of an interference fit. This hybrid joining technology consists in coupling two cylindrical components together by force-fitting one into the other after having placed an adhesive on the mating surfaces. This technique would allow the joining of dissimilar material to enable the design of hybrid lightweight wheels. Moreover, it would provide a better stress distribution in the joint area that could induce fatigue life improvement.
The contributions of the adhesive and the interference on the performance of the final hybrid joint is still not completely clear. In particular, the effect of the adhesive nature and of its mechanical and adhesive responses on the performance of the hybrid joint is under concern in this research. A study of the phenomena acting at the interference level is conducted at the laboratory level before industrial case application. An experimental method is set up in order to test the adhesives in a press fit joint. Static and dynamic tests are carried out examining the behavior of different adhesives, including rigid epoxies and flexible polyurethanes, and fractographic analysis are then performed.
The second part of the study is focused on the feasibility of the hybrid technology on the wheel system. Exploiting the outcomes of the laboratory analysis, bonded wheel prototypes are assembled and tested statically and dynamically, according to component validation in MW.
From the laboratory scale analyses it is found that the adhesive type mainly affects the static resistance of the hybrid joint. In particular the curing technology affects the decoupling behavior and the rheology influences the quantity of adhesive that remains inside the joint despites the interference levels. On the other hand, the interference rules the stiffness of the assembly and strongly affects the fatigue behavior of the cylindrical joint. The study conducted on the wheel component confirms the laboratory scale outcomes. For what concern the feasibility study, the bonded wheel shows similar performances compared to the welded wheel without design modifications of the components. However, the joint geometry has to be redesigned to exploit all the advantages of the adhesive bonding
INFN What Next: Ultra-relativistic Heavy-Ion Collisions
This document was prepared by the community that is active in Italy, within
INFN (Istituto Nazionale di Fisica Nucleare), in the field of
ultra-relativistic heavy-ion collisions. The experimental study of the phase
diagram of strongly-interacting matter and of the Quark-Gluon Plasma (QGP)
deconfined state will proceed, in the next 10-15 years, along two directions:
the high-energy regime at RHIC and at the LHC, and the low-energy regime at
FAIR, NICA, SPS and RHIC. The Italian community is strongly involved in the
present and future programme of the ALICE experiment, the upgrade of which will
open, in the 2020s, a new phase of high-precision characterisation of the QGP
properties at the LHC. As a complement of this main activity, there is a
growing interest in a possible future experiment at the SPS, which would target
the search for the onset of deconfinement using dimuon measurements. On a
longer timescale, the community looks with interest at the ongoing studies and
discussions on a possible fixed-target programme using the LHC ion beams and on
the Future Circular Collider.Comment: 99 pages, 56 figure
A framework for the investigation of heme homeostasis through genetically encoded heme sensors
The Ionotropic Receptors IR21a and IR25a mediate cool sensing in Drosophila.
Animals rely on highly sensitive thermoreceptors to seek out optimal temperatures, but the molecular mechanisms of thermosensing are not well understood. The Dorsal Organ Cool Cells (DOCCs) of the Drosophila larva are a set of exceptionally thermosensitive neurons critical for larval cool avoidance. Here, we show that DOCC cool-sensing is mediated by Ionotropic Receptors (IRs), a family of sensory receptors widely studied in invertebrate chemical sensing. We find that two IRs, IR21a and IR25a, are required to mediate DOCC responses to cooling and are required for cool avoidance behavior. Furthermore, we find that ectopic expression of IR21a can confer cool-responsiveness in an Ir25a-dependent manner, suggesting an instructive role for IR21a in thermosensing. Together, these data show that IR family receptors can function together to mediate thermosensation of exquisite sensitivity
SUSTAINABLE FOOD SYSTEM: A SHARING RESPONSIBILITY
The food system has slowly passed from a natural process into an industrial one, becoming increasingly affordable and abundant, but more standard and approved. This has modified our relationship with food: we eat more than we need; we buy more than we can consume. These shortcomings lead separating our choices from their effects on health and territory. The purpose of our work is to define how the systemic approach increases the level of resilience of small companies, helping to raise the endogenous processes and the variety within the territory system in order to define an economic potential on a local scale
Effective Rheology of Bubbles Moving in a Capillary Tube
We calculate the average volumetric flux versus pressure drop of bubbles
moving in a single capillary tube with varying diameter, finding a square-root
relation from mapping the flow equations onto that of a driven overdamped
pendulum. The calculation is based on a derivation of the equation of motion of
a bubble train from considering the capillary forces and the entropy production
associated with the viscous flow. We also calculate the configurational
probability of the positions of the bubbles.Comment: 4 pages, 1 figur
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