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Copyright of Summa, Animali da Compagnia is the property of Point Veterinaire Italie s.r.l. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The choice of an adequate risk measure in portfolio optimization depends to a large extent on the characteristics and dynamics of the underlying assets. For investors and asset managers, a range of potential market risks provides much- needed insights into the optimization of their portfolio of assets. Since this paper focuses on multiple risk measures, it presents the investors with a better insight into the potential magnitude of the risk they are faced with. Since the risk-reward optimization target can be adjusted for a broad choice of risk measures in this paper we will test the performance of the classical risk measure i.e. standard deviation versus a tail risk measure such as expected tail loss (ETL). Our goal is to find which of the two offers the better performance for a portfolio of cryptocurrencies and if the differences are statistically significant. The setup for our analysis is testing two optimization targets (MinVar and MinETL) on 10 portfolios of cryptocurrencies randomly chosen from a sample of 70 cryptocurrencies with the highest market capitalization.

Accidents that occur in built spaces represent the result of the interaction of several factors. Some of these factors are attributable to the characteristics of the environment, others depend on the user and the ways in which the environment is used. The multifactorial nature of accidents explains why sectorial approaches represent a significant obstacle to the implementation of effective policies and intervention strategies for creating safer and more usable environments. The subject of this essay, that pays special attention to residential scenarios, is the description and classification of risk factors, that is, those environmental circumstances as well as individual and behavioural conditions that increase the frequency and / or magnitude of an accident. The article highlights the need for a comprehensive view of accidents as a cultural condition for an inclusive and safe design (technical prevention) and effective information campaigns aimed at users (prevention in use).

Accidents that occur in built spaces represent the result of the interaction of several factors. Some of these factors are attributable to the characteristics of the environment, others depend on the user and the ways in which the environment is used. The multifactorial nature of accidents explains why sectorial approaches represent a significant obstacle to the implementation of effective policies and intervention strategies for creating safer and more usable environments. The subject of this essay, that pays special attention to residential scenarios, is the description and classification of risk factors, that is, those environmental circumstances as well as individual and behavioural conditions that increase the frequency and / or magnitude of an accident. The article highlights the need for a comprehensive view of accidents as a cultural condition for an inclusive and safe design (technical prevention) and effective information campaigns aimed at users (prevention in use). [ABSTRACT FROM AUTHOR]

The "Risk Based Inspection" technology API RP 581 provides, since September 2008 edition, a specific module for the heat exchanger - tube bundle maintenance planning. These components generally require lower maintenance intervals than those for inspections aimed at the detection of damage that can result in loss of tube wall integrity. This document describes the procedure laid down in API document for the maintenance time-intervals management of the heat exchanger tube bundles, highlighting the problems for industrial and extensive applications. [ABSTRACT FROM AUTHOR]

This work is inspired by a series of failures that occurred in Total Isomerization Plants (TIP) in different Italian Refineries on piping systems made of carbon steel (CS) attributed to High Temperature Hydrogen Attack (HTHA); in each case the failure occurred in non-Post Weld Heat Treated (PWHT) welded joints and on components operating below the carbon steel relevant Operating limits curve of API RP 941 - Steels for Hydrogen Service at Elevated Temperatures and Pressure in Petroleum Refineries and Petrochemical Plants. To better clarify the damage mechanism, laboratory failure analyses on the damaged welded joints was carried out. Hence the need to develop a technical approach aimed at defining Non Destructive Test (NDT) priorities, types and extension for reliable detection and monitoring of damage. Such a novel approach was developed by the definition of a risk level achieved by overlapping the classical API RP 941 curves approach for carbon steel with the Pv parametric approach reported in "API RP 581 -Risk-Based Inspection Technology" and first proposed by Japan Pressure Vessels Research Council (JPVRC). By the application of the above-mentioned approach it is possible to establish a risk ranking for the different piping systems of a TIP Unit potentially exposed to Hydrogen damage. Based on this ranking NDT priority & extension can be defined. The approach presented has been applied in a specific TIP Unit; NDT prescribed have actually detected the presence of HTHA on different CS pipe components in non-PWHT welded joints. Finally, some mitigation actions are proposed to lower the HTHA probability of component in high temperature and H2 service in TIP Units together with the opportunity to update the API RP 941 Carbon Steel Operating limits curve, especially for welded components without PWHT. [ABSTRACT FROM AUTHOR]

The Risk Based Inspection Technology worked out by the American Petroleum Institute is a management tool subjected to a continuous process of renewal and development. This article exposes the latest proposed revision of the likelihood of failure assessment that integrates the calculation procedures developed in the context of reliability assessments as Fitness For Service. [ABSTRACT FROM AUTHOR]

Copyright of Sociologia del Diritto is the property of FrancoAngeli srl and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article proposes a modification of the Piedmontese model to keep in line with the national and international rules and regulations on the evaluation of chemical risk for both companies and regional prevention system. The problems with the model are tied to the use of section in the evaluation technique based on the estimate and not on the exposure measurement. Moreover, some cases it is not possible to discard an accurate evaluation which is not able to make a correct scientific evidence.