Annali del Dipartimento di metodi e modelli per l'economia, il territorio e la finanza

An acceptance-rejection algorithm for the kolmogorov distribution

Paolo Onorati — 2023-04-28

We discuss an acceptance-rejection algorithm for the random number generation from the Kolmogorov distribution. Since the cumulative distribution function (CDF) is a functions series and we need the density distribution function in our algorithm, we prove that the series of the derivatives converges uniformly in order to can derive term by term the functions series; also we provide
a similar proof for showing that the ratio between the target Kolmogorov density and the auxiliary density implemented is bounded. Finally, for the application in the algorithm we propose to approximate the density of Kolmogorov distribution by truncation series where the truncation is posed as far away as possible according to the precision of the calculator, we asses the accuracy of this method by a simulation study.

The effects of migration on epidemics: issues and models

Giuseppe Schinaia — 2023-05-18

Epidemics and demographic dynamics frequently interact in the contemporary globalized world and concurrently contribute to the spread of infections. Migrations constitute some relevant demographic dynamics among local communities and, when an epidemic is in act, they add further complexity to the model design of the epidemic and to its evaluation and possible control measures. This paper offers various schemes of epidemic modelling, where the exogenous fractions of susceptible and infected/infectious individuals migrate into a local community on the basis of sociodemographic, economic and climate change issues. A classical Kermack-McKendrick SIR (susceptible-infected-removed) dynamical model is flexible enough to describe the spread of several common infections such as most hepatitis, HIV/AIDS and other STD diseases, all exanthematous infections and others and is here adjusted to accommodate various schemes of migration, both susceptible and infected/infectious. Results of the modelling design provide qualitative information on the overall dynamics of the spread of the infections and can be used to appoint more effective public health measures of control.

Rome solidarity city: the Covid-19 and the transformation of collective action

Andrea Simone — 2023-04-28

The aim of this contribution is to reflect on the socio-spatial dynamics induced by the Covid-19 health crisis on mutual aid in metropolitan contexts. Based on in-depth interviews with eight social actors of the eastern part of the city of Rome, the contribution focuses on the transformations experienced during and after the peak of the 2020 health emergency by those actors in the internal, relational and territorial dimensions, as well as in their future prospects. The pandemic seems to have stimulated a renewal, in the medium-long run, of the acknowledgment and role of associations in supporting the most vulnerable citizens, able to reverse the course of exclusion and marginalisation in our cities.

Emerging housing policies. Affordable housing and urban property

Daniela Anna Festa — 2023-05-29

Access to housing is a main challenge for contemporary urban policies. Community Land Trusts encounter a growing interest as ways to ensure affordable housing. They are based on three elements: the disjunction of land ownership from the enjoyment of housing; the limitation of the rent; the tripartite governance involving residents, the local community, and public stakeholders. CLT represents – not public nor private - housing policies aiming to ensure the right to the city for medium and low-income people and minorities. In France, a similar institution directly inspired to CLT, the Organisme de Foncier Solidaire (OFS), was included in the urban code in 2014 and many major cities have supported its development for avoiding middle-class suburbanization. This paper analyses the genesis and circulation of CLT between US and Europe, especially focusing on the French OFS. Both American and French solutions represent innovative policies characterized by a performative use of property aiming to reverse exclusivity and to contrast the urban rent promoting social access. Despite recurrent references to the CLT, OFS does not promote community participation actually seeking the contrast of real estate speculation and the control of public funds more than the general politicization of affordable housing as urban commons.

A multimodal corpus approach to understanding parliamentary debates: the role of gesture and institutional discourse

Ersilia Incelli — 2023-05-29

This contribution aims to contribute to current research on the effects of multimodality on ESP education, with particular reference to the situational context of the university language classroom. Changes in the way society interacts and accesses information as a result of the present move from language-centered texts to multimodal texts, have had a profound impact on education. As a result, in order to adapt and respond to the continuously changing educational landscape, higher education teachers are increasingly obliged to develop new or alternative conceptions of meaning and communication. For this purpose, the primary objective and impetus of this work is to demonstrate how multimodality and the multi-semiotic dimensions of digital communication may be incorporated into an academic ESP curriculum. The study also intends to illustrate how corpus linguistic retrieval of phraseology can be used to enhance ESP language acquisition through research-informed analyses of a multimodal corpus of video clips.

Pay As You Drive Insurance and Chrono-Urbanism: time as a strategic variable

Maria Giuseppina Bruno — 2023-11-27

Within the general class of Pay As You Drive car insurance policies, in this work we propose a Time-Based policy, in which the car use is measured in terms of time spent driving. In particular, we explain how time-based ratemaking can contribute to a better personalization of the premium, with consequent advantages for the insurance company and the policyholder, but at the same time it can represent a useful nudging tool to reduce dependence on cars and can contribute to the achievement of the goals of sustainable mobility, and therefore environmental sustainability, of modern chrono-urbanism models. We also show the results of an analysis carried out on mobility data from the city of Rome which provide some initial information on the link between time and risk, useful both for pricing these policies and for identifying their potential market target and the infrastructural and behavioral aspects that can influence their effective use as an incentive and stimulus for a more aware use of transport means.

Public geography and citizen science: participatory practices for action research

Cristina Capineri — 2023-11-16

The paper addresses the relationships between geography and the emerging domain of citizen science as a possible scenario for the strengthening of public geography. Drawing from the Manifesto of Public Geography published in 2018 and from the following contributions, the paper highlights how core geographical concepts (space, place, location, distributions, territorial systems) are applied in citizen science activities and how the principles of citizen science, such as participation and field work can fertilize future paths for a public geography. The paper describes the phases and methods of citizen science and then explains that the relationship with geography is built on core spatial dimensions, the creation crowdsourced information and place making.

Communiqués de presse AXA en français et en italien: quelques stratégies argumentatives du discours spécialisé et du discours promotionnel

Antonella Leoncini Bartoli — 2023-12-07

This study aims at characterising the corporate press releases of the Axa Group of Insurance according to his principal website in French and English and his localised website in Italian between September 2022 and September 2023. The paper identifies a set of linguistic strategies typical of the genre and their actualisation in the two selected corpora and links them to communicative purpose as well as to the envisioned audience. For each corpus analyses of the visual and textual contents were carried out. The argumentative analysis of press releases’s titles and quotations demonstrate the intention of consolidate the positive image of reliability of the Group as well as his promotional aim.

Housing tenure trajectories and health: reflections on a research gap

Agostino Cristofalo — 2023-12-11

Previous research has documented better physical and mental health among homeowners than among renters and individuals living in other housing tenures, presumably because homeownership contributes to a better quality of the built environment, reinforces pre-existing socio-economic advantages, and alleviates house-related stress by providing a sense of “ontological security”. To date, most of the research on homeownership and health has been conducted in a cross-sectional manner, while studies adopting longitudinal and life-course perspectives are rare. This research note discusses potential research developments to fill this gap, building on the theoretical framework of life-course epidemiology, with a specific focus on the European context.

Srnicek Nick, Platform capitalism, Polity Press, 2017, pp. 171

Gianluca Bei — 2023-12-15

Christophers Brett, Rentier capitalism: who own the economy, and who pays for it?, Verso, 2020, pp. 512

Cesare Di Feliciantonio — 2023-12-15

Preface

Venere Stefania Sanna — 2023-12-30