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Search Results: 1 - 10 of 461991 matches for " A. Cantaluppi "
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Radiological impact of phosphogypsum discharged into the Venice lagoon: 222Rn
Cantaluppi C.,Ceccotto F.,Cianchi A.,Fasson A.
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20122406001
Abstract: For about 20 years, between the 60 ’s and the 80 ’s of the last century, in the Passo a Campalto area (Lagoon of Venice - Italy) about 400,000 m3 of phosphogypsum (PG) were deposited at the border of the lagoon and next to urban areas without any environmental control. These materials are a by-product formed during the wet processing of phosphate rocks by sulphuric acid and have a significant environmental impact due to their abundance and their chemical-physical and radiochemical characteristics. The PG contains both chemical elements, which are considered dangerous for the ecosystems and natural radionuclides whose concentrations are much higher if compared to those typical for the Earth’s crust. These discarded materials caused for many years the dispersion of radionuclides in the environment due to the tidal erosion, the re-suspension of radioactive inhalable dusts, the uncontrolled radon exhalation and the bioaccumulation of some radionuclides in the lagoon environment. After a decision of the appointed authorities, the Venice Water Authority (Ministry of Infrastructure and Transport), planned a permanent safety control of the site resulting in the complete isolation of the entire volume of contaminated materials from the environmental system. The entire project was specific for the particular features of the site and it required the improvement of analytical, sampling and measurement techniques in order to verify the effectiveness of the safety action. The radon assessment, in particular the check of the effectiveness of the inhibition of radon exhalation, is part of a more complex study, covering many other aspects of the management of a permanent disposal; they will be the object of further notes. The ultimate results of this study prove the efficacy of the intervention: radon concentrations in air and exhalation values from the restored area, measured during surveys, have been proved to be well in agreement with those of non contaminated soils.
Radiochemical analysis of waters and mud of Euganean spas (Padua)
Cantaluppi C.,Fasson A.,Ceccotto F.,Cianchi A.
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20122403001
Abstract: The area around the Euganean Hills (North-East Italy) is concerned with thermal phenomena known and used for therapeutic purposes since ancient times. The thermal waters collected in this area have taken up a natural radionuclides content due to the leaching of hot and permeable deep rocks, with which they come into contact, before their rising to the surface. During the "maturation" process of the mud used for treatment purposes, the thermal waters make happen a complex series of biochemical changes and release a series of chemical species to the mud, resulting, in particular, in an enrichment phenomenon for some radionuclides. In this work, the first radiochemical analysis extended to all the Euganean Thermal District is reported. In particular, chemical analyses of mud, as well as radiochemical analyses of both mud and waters were performed; the enrichment of the radioisotopes in mud used for treatments was also documented. The results show that the 226Ra content in mud, during the "maturation" process, presents an enrichment even of one order of magnitude with respect to the value found in the unprocessed mud. Furthermore, in the same thermal waters, high concentrations of "unsupported" 222Rn have been found, which have shown to be not completely negligible both for people under treatment and particularly for spa workers.
Comment on "Terahertz time-domain spectroscopy of transient metallic and superconducting states" (arXiv:1506.06758)
D. Nicoletti,M. Mitrano,A. Cantaluppi,A. Cavalleri
Physics , 2015,
Abstract: We comment on the model proposed by Orenstein and Dodge in arXiv:1506.06758v1, which describes time-domain terahertz measurements of transiently generated, high-electron-mobility (or superconducting) phases of solids. The authors' main conclusion is that time-domain terahertz spectroscopy does not measure a response function that is mathematically identical to the transient optical conductivity. We show that although this is correct, the difference between the measured response function and the microscopic optical conductivity is small for realistic experimental parameters. We also show that for the experiments reported by our group on light-induced superconducting-like phases in cuprates and in organic conductors, the time-domain terahertz yields a very good estimate for the optical conductivity.
Eligio Resta, Diritto Vivente (Bari: Editori Laterza, 2008)
Carlo Cantaluppi
Nordicum-Mediterraneum , 2010,
Abstract: A review of Eligio Resta, Diritto Vivente (Bari: Editori Laterza, 2008)
Pia Guldager and Jane Hjar Petersen (eds.), Meetings of cultures in the Black Sea region. Between conflict and coexistence, (Aarhus: Aarhus University Press, 2008)
Carlo Cantaluppi
Nordicum-Mediterraneum , 2011,
Abstract: Book review of Pia Guldiger's and Jane H. Petersen's Meeting of cultures in the Black Sea region. Between conflict and coexistence (Aarhus: Aarhus University Press, 2008).
Una figura dell'efficacia filosofica: hybris
Carlo Cantaluppi
Nóema , 2011,
Pensare l'evento
Carlo Cantaluppi
Nóema , 2011,
A Partial Least Squares Algorithm Handling Ordinal Variables also in Presence of a Small Number of Categories
Gabriele Cantaluppi
Statistics , 2012,
Abstract: The partial least squares (PLS) is a popular modeling technique commonly used in social sciences. The traditional PLS algorithm deals with variables measured on interval scales while data are often collected on ordinal scales: a reformulation of the algorithm, named ordinal PLS (OPLS), is introduced, which properly deals with ordinal variables. An application to customer satisfaction data and some simulations are also presented. The technique seems to perform better than the traditional PLS when the number of categories of the items in the questionnaire is small (4 or 5) which is typical in the most common practical situations.
An Application of the Consumer Disposition toward Satisfaction Scale for a-Priori Segmentation
Giuseppe Boari,Gabriele Cantaluppi
Journal of Applied Sciences , 2011,
Abstract: In this study, an a-priori latent segmentation procedure is proposed, which is based on an adaptation of the Consumer Disposition toward Satisfaction (CDS) scale to the Italian social environment. The disposition level is then used to define clusters of the respondents to the Customer Satisfaction annual survey concerning the Italian banking system. In order to verify the evidence of a proper classification the multivariate test of homogeneity is suggested
Construction of the balanced scorecard by using structural equation models with latent variables
Giuseppe Boari,Gabriele Cantaluppi
Electronic Journal of Applied Statistical Analysis : Decision Support Systems and Services Evaluation , 2010,
Abstract: The Balanced Scorecard is one of the most important quantitative tool for the business strategic planning. Its implementation usually concerns the construction and analysis of proper weighted averages of the so-called Key Performance Indicators (KPI); these are either objective or subjective evaluations of the performance levels attained by the various sub-systems constituting a business organization. Recent evolutions of the model are considered and a particular version of the Balanced Scorecard, based on Structural Equation Models with Latent Variables, is introduced.
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