Search results for "cost"
showing 10 items of 5421 documents
Context dependent variation in corticosterone and phenotypic divergence of Rana arvalis populations along an acidification gradient
2022
Background Physiological processes, as immediate responses to the environment, are important mechanisms of phenotypic plasticity and can influence evolution at ecological time scales. In stressful environments, physiological stress responses of individuals are initiated and integrated via the release of hormones, such as corticosterone (CORT). In vertebrates, CORT influences energy metabolism and resource allocation to multiple fitness traits (e.g. growth and morphology) and can be an important mediator of rapid adaptation to environmental stress, such as acidification. The moor frog, Rana arvalis, shows adaptive divergence in larval life-histories and predator defense traits along an acidi…
L’assenza di ‘legificazione’ delle linee guida al P.E.A.R.S. e l’impossibilità di compiere un controllo ‘indiretto’ di costituzionalità
2014
Rapporto energia 2013: monitoraggio sull’energia in Sicilia
2013
L’obiettivo della politica energetica europea è quello di abbassare le emissioni di CO2 e di operare una trasformazione del sistema che privilegi un'economia a basse emissioni di carbonio ed estremamente efficiente sotto il profilo energetico. A tal fine, l’U.E. ha allungato l’orizzonte temporale entro cui raggiungere questi virtuosi risultati e, con il Libro verde della Commissione «Un quadro per le politiche dell'energia e del clima all'orizzonte 2030», del 27 marzo 2013, ha aperto una consultazione sulle modalità con cui coniugare il soddisfacimento della sempre più crescente domanda di energia con le necessità di riduzione dei gas inquinanti e di fornitura di energia a prezzi contenuti,…
La disciplina sulle energie rinnovabili nella dinamica delle fonti del diritto. La legislazione regionale nella morsa della sussidiarietà?
2010
Lo scritto approfondisce le molteplici e complesse problematiche sottese alla disciplina in materia di produzione di energia da fonti rinnovabili. Si tratta, infatti, di una materia che addensa una serie di criticità, per le sue connessioni, sul piano sostanziale, con altri settori competenziali (es. tutela dell'ambiente, del paesaggio, della concorrenza, sviluppo economico). Queste connessioni hanno ulteriormente complicato la definizione di un ruolo esatto delle Regioni nell'esercizio della potestà legislativa concorrente in materia di energia, di fatto bloccando l'articolazione dell'intervento statale e regionale prefigurata dall'art. 117, comma 3. La giurisprudenza costituzionale, posta…
Evaluation of the water scarcity energy cost
2009
A Strategy for the Prediction of the Response of Hysteretic Systems: A Base for Capacity Assessment of Buildings under Seismic Load
2014
A statistical non linearization method is used to approximate systems modeled by the Bouc differential equa- tion and excited by a Gaussian white noise external load. To this aim restricted potential models (RPM) are used, which are suitable for an extended number of nonlinear problems as have been proved several times. Since the solution of RPM is known by the probabilistic point of view, all statistical characteristics can be derived at once with advantages by the computational point of view. Hence, this paper discusses the possibility to determine sets of parameters characterizing po- tential models that are valid for describing a hysteretic behavior. In this way the characterization of …
Coupled Electric and Hydraulic Control of a PRS Turbine in a Real Transport Water Network
2019
Although many devices have recently been proposed for pressure regulation and energy harvesting in water distribution and transport networks, very few applications are still documented in the scientific literature. A new in-line Banki turbine with positive outflow pressure and a mobile regulating flap, named Power Recovery System (PRS), was installed and tested in a real water transport network for the regulation of pressure and flow rate. The PRS turbine was directly connected to a 55 kW asynchronous generator with variable rotational velocity, and coupled to an inverter. The start-up tests showed how automatic adjustment of the flap position and the runner velocity variation are able to c…
Development of energy-saving innovative hydraulic mortars reusing spent coffee ground for applications in construction
2023
This paper reports the development of green bio-composite mortars, obtained reusing spent coffee ground (SCG), an agri-food residue, in the light of the Circular Economy approach. This process can boost the sustainability in Construction and proposes an alternative to SCG disposal in landfill, potentially dangerous to humans and the environment. For the first time, specimens were produced and compared using different blends of conventional hydraulic binders (ordinary Portland cement and natural hydraulic lime); SCG partially substituted sand (up to 15 wt.%, with a 2.5% increment) for the aggregate mix. The manufacturing process was performed at ambient conditions (20°C, 65% RH) resulting hi…
Which firms benefit from investments in green energy technologies? : The effect of energy costs
2019
Abstract Firms will invest in green energy technologies only if these investments have an economic pay-off. Based on unique firm-level data from Austria, Germany, and Switzerland, we find that the marginal effect of investments in green energy technologies on productivity is positive only for the 19% of firms with the highest energy costs. These results have major implications for companies and policy makers regarding the design of green energy policies and incentives.