177,789 research outputs found
Redi F, Alberini F, Montagnetti R, Siena E (2017). Colle di Casciano nel territorio di Barete (AQ): note di topograia tardoantica e altomedievale dell’alta valle dell’Aterno. ARCHEOLOGIA MEDIEVALE, vol. XLIV, p. 219-235, ISSN: 0390-0592
No full textIn this paper it is presented the work of Airborne remote sensing by UAV and the consequent aero-photogrammetric survey of the area immediately to the north of Colle di Casciano, between the districticts of Basanello and Teora, both in municipal territory of Barete (AQ) - Italy. The aerial remote sensing by UAV of that area is one of the great research project of the L'Aquila University aimed at deepen of the the knowledge and study of the site where they were found the ostrogote belt buckles today preserved in the Museum of Villa Giulia in Rome. The remote sensing of that area has been finalized to the elaboration of some orthophoto for a better identification of several cropmarks and soilmarks that we have already identified on the site thanks to satellite images
Accidents Waiting to Happen: Liability Policy and Toxic Pollution Releases
No full textProponents of environmental policies based on liability assert that strict liability imposed on polluters induces firms to handle hazardous wastes properly. We run regressions relating unintended pollution releases to strict liability imposed on polluters, exploiting variation across states and over time in the liability provisions of state mini-Superfund laws. Strict liability reduces the frequency and severity of pollution releases, provided it is modeled endogenously with the latter. Its effects vary with firm size. Partially sheltered from liability, small firms may have specialized in riskier production processes, but their number has not necessarily grown in response to the states’ liability policy.strict liability, negligence, hazardous waste, state environmental policy, endogenous policy adoption
Gas-liquid hydrodynamics in Taylor Flows with complex liquids
No full textUniversitá di Pisa
Facoltá di Ingegneria
Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei Materiali
Relazione di tirocinio
in Ingegneria Chimica
Gas-liquid hydrodynamics in Taylor Flows with complex liquids
Il candidato:
Federico Alberini
Il relatore: Prof. Elisabetta Brunazzi
Controrelatore:
Prof. Ing. Roberto Mauri
Anno Accademico 2009-201
Voluntary Cleanups and Redevelopment Potential: Lessons from Baltimore, Maryland
No full textPolicy has increasingly shifted towards economic incentives and liability attenuation for promoting cleanup and redevelopment of contaminated sites, but little is known about the effectiveness of such policies. An example of such legislation is State Voluntary Cleanup Programs (VCPs), which were established in the US in the 1990s and to date have been implemented in almost every state. We examine Baltimore properties that participated in the Maryland VCP from its inception in 1997 to the end of 2006. Specifically, we examine what type of properties tend to participate in these programs, how these properties compare to other eligible but non-participating sites, and what is the redevelopment potential of VCP properties and implications towards open space conversion. We find that most applicants (66%) actually requested a “No Further Action Determination” directly, rather than proposing cleanup. VCP properties tend to be industrial, located in industrial areas, and away from residential neighborhoods. In more recent years larger industrial properties have increasingly enrolled in the program. The majority of sites are reused as industrial or commercial. In contrast to Alberini (2007), this suggests that pressure for residential development does not drive VCP participation. Based on differences in zoning requirements, the VCP may reduce demand for potentially contaminating activities on pristine land by as much as 1,238 to 6,444 acres, in Baltimore alone.Brownfields, Contaminated Sites, Voluntary Cleanup Programs, Incentives
Numerical modelling of wrinkled hyperelastic membranes with topologically complex internal boundary conditions
No full textSeveral soft biological tissues and artificial materials are characterised by a mechanical behaviour described by two-dimensional structural systems sustaining in-plane forces. Within the framework of finite strain elasticity, in this paper the formulation and finite element implementation of a hyperelastic incompressible membrane is presented. Focus is placed on the behaviour of membranes presenting holes and internal cuts. A new efficient algorithm is presented to describe topologically complex internal boundaries along which dislocation-like distributions are prescribed, so as to allow a one-to-one progressive joining of boundary material points. The classical Ogden's model is modified into a relaxed version in order to accommodate the no-compression response of thin membranes due to wrinkling. Three applicative examples are presented to illustrate the potential of the method proposed
A numerical study of an Heaviside function driven degenerate diffusion equation
No full textWe analyze a nonlinear degenerate parabolic problem whose diffusion
coefficient is the Heaviside function of the distance of the solution itself
from a given target function. We show that this model behaves as an evolutive
variational inequality having the target as an obstacle: under suitable
hypotheses, starting from an initial state above the target the solution
evolves in time towards an asymptotic solution, eventually getting in contact
with part of the target itself. We also study a finite difference approach to
the solution of this problem, using the exact Heaviside function or a regular
approximation of it, showing the results of some numerical tests
Determinants and Effects on Property Values of Participation in Voluntary Cleanup Programs: The Case of Colorado
No full textState Voluntary Cleanup Programs (VCPs) were established starting in the 1990s to encourage the environmental remediation and redevelopment of contaminated properties. These programs typically offer liability relief, subsidies and other regulatory incentives in exchange for site cleanup. This paper asks three questions: First, what type of properties are attracted to voluntary cleanup programs? Second, what is the interaction between these state programs and other incentives for remediation and economic development, such as Enterprise Zone and Brownfield Zone designations? Third, what is the effect of participation in the VCP on property values? We use data from Colorado’s VCP to answer these questions. We find that most of the properties enrolled in this program were not previously listed on EPA’s contaminated site registries, and that most applicants seek to obtain directly a “no further action” determination without undergoing remediation. The main determinants of participation are the size of the parcel and whether the surrounding land use is primarily residential, while other incentives have little effect. Properties with confirmed contamination sell at a 47% discount relative to comparable uncontaminated parcels, and participation tends to raise the property price, but this latter effect is not statistically significant. Taken together, these findings suggest that the participating properties are those with high development potential, and hint at the possibility that owners or developers may be seeking to obtain a clean bill of health from the State with only minimal or no cleanup efforts. Were these findings confirmed with data from other states, they would raise doubts about the effectiveness of voluntary programs in encouraging remediation and their usefulness in reversing some of the undesired effects of the Superfund legislation.Brownfields, Contaminated sites, Voluntary cleanup programs, Incentives
Willingness to Pay for Mortality Risk Reductions: Does Latency Matter?
No full textUsing results from two contingent valuation surveys conducted in Canada and the U.S., we explore the effect of a latency period on willingness to pay (WTP) for reduced mortality risk using both structural and reduced form approaches. We find that delaying the time at which the risk reduction occurs by 10 to 30 years reduces WTP by more than half for respondents in both samples aged 40 to 60 years. Additionally, we estimate implicit discount rates equal to 8% for Canada and 4.5% for the U.S. – both well within the range established previously in the literature.Value of a statistical life, Mortality risks, Benefit-cost analyris
Determinants and Effects on Property Values of Participation in Voluntary Cleanup Programs: the Case of Colorado
No full textState Voluntary Cleanup Programs (VCPs) were established starting in the 1990s to encourage the environmental remediation and redevelopment of contaminated properties. These programs typically offer liability relief, subsidies and other regulatory incentives in exchange for site cleanup. This paper asks three questions: First, what type of properties are attracted to voluntary cleanup programs? Second, what is the interaction between these state programs and other incentives for remediation and economic development, such as Enterprise Zone and Brownfield Zone designations? Third, what is the effect of participation in the VCP on property values? We use data from Colorado’s VCP to answer these questions. We find that most of the properties enrolled in this program were not previously listed on EPA’s contaminated site registries, and that most applicants seek to obtain directly a “no further action†determination without undergoing remediation. The main determinants of participation are the size of the parcel and whether the surrounding land use is primarily residential, while other incentives have little effect. Properties with confirmed contamination sell at a 47% discount relative to comparable uncontaminated parcels, and participation tends to raise the property price, but this latter effect is not statistically significant. Taken together, these findings suggest that the participating properties are those with high development potential, and hint at the possibility that owners or developers may be seeking to obtain a clean bill of health from the State with only minimal or no cleanup efforts. Were these findings confirmed with data from other states, they would raise doubts about the effectiveness of voluntary programs in encouraging remediation and their usefulness in reversing some of the undesired effects of the Superfund legislation.
R&D in Cleaner Technology and International Trade
No full textWe consider a dynamic three-stage game played by two regulator-firm hierarchies to capture the scale and technological effects of opening markets to international trade. Each firm produces one good sold on the market. Firms can invest in R&D in order to lower their fixed emission/output ratio and are regulated with costly public funds. We take the context of sufficiently high market sizes and investment cost parameters. Opening markets to international trade yields more investment in R&D, more production and a lower emission ratio. When the market size is low enough and the investment cost parameter is high enough, pollution in common market is higher than in autarky. International trade reduces the social welfare.R&D, Cleaner technology, Common market, Social welfare
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