1,270 research outputs found
Realizing smiles: Options pricing with realized volatility
No full textWe develop a discrete-time stochastic volatility option pricing model exploiting the information contained in the Realized Volatility (RV), which is used as a proxy of the unobservable log-return volatility. We model the RV dynamics by a simple and effective long-memory process, whose parameters can be easily estimated using historical data. Assuming an exponentially affine stochastic discount factor, we obtain a fully analytic change of measure. An empirical analysis of Standard and Poor's 500 index options illustrates that our model outperforms competing time-varying and stochastic volatility option pricing models
INDUSTRIAL HERITAGE AND LANDSCAPE: THE ROLE OF WATER IN THE ARCHITECTURAL REACTIVATION DESIGN FOR THE BURGO PAPER MILL IN MANTUA
No full textThe paper is part of a research project, carried out within the Polytechnic University of Milan about the Burgo Paper Mill, an industrial settlement involved in the production of paper near the UNESCO World Heritage site of Mantua, on the banks of the Lago di Mezzo lake. The area represents an exceptional case study related to the topics of industrial reconversion, landscape, environmental design, and the valorization of cultural and natural heritage. The recent change in the site ownership fostered a new life cycle, which represents the occasion for the enhancement of its architectural and landscape heritage. The research project focused on a new system of relations between architectural artefacts and open spaces, with a particular consideration about socioeconomic and cultural themes, as well as the role that water can play in the future development of the site. Water plays a key role in the definition of cultural and natural elements in this research project, revealing new possibilities for revitalization of the industrial settlement as well as the whole territorial framework. Between theoretical thought and design experimentation, pursuing to tackle the problem in its whole complexity, the authors understood the necessity of a multi-scalar approach structured within a time-based strategy
Comprendere i beni delle comunità religiose nella prospettiva della loro valorizzazione
No full textL'articolo tenta una disamina delle caratteristiche proprie dei beni culturali delle comunità religiose in vista del progetto di percorsi volti alla loro valorizzazion
Correction to: When terminology hinders research: the colloquialisms of transitions of control in automated driving (Cognition, Technology & Work, (2022), 10.1007/s10111-022-00705-3)
No full textIn the original article, author affiliation published with error. The correct affiliations are: Davide Maggi—Institute for Transport Studies, Leeds, UK. Richard Romano—Institute for Transport Studies, Leeds, UK. Oliver Carsten—Institute for Transport Studies, Leeds, UK. Joost C. F. De Winter—Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Delft, The Netherlands. The original article has been corrected.Human-Robot Interactio
Voice Quality in Multiple Sclerosis: A Clinical Perspective on Cepstral Peak Prominence-Smoothed and Harmonic-to-Noise Ratio
No full textThis study aims to evaluate voice quality in people with multiple sclerosis (pwMS) with moderate-to-severe disability using objective acoustic measures: Cepstral peak prominence-smoothed (CPPS) and harmonic-to-noise ratio (HNR). The objectives are to compare these measures between pwMS and healthy subjects (HS) and assess their diagnostic accuracy in identifying inadequate voice quality and the need for voice rehabilitation. We hypothesize that pwMS will exhibit reduced voice quality compared to HS, with CPPS being a more reliable marker than HNR for assessing vocal impairments and guiding rehabilitation decisions.
This cross-sectional study involved 34 pwMS with moderate-to-severe disability and 40 sex-matched HS.
Participants’ voice recordings were collected through a 1-minute monologue and analyzed using PRAAT software (University of Amsterdam, Amsterdam, The Netherlands). Acoustic measures, CPPS and HNR, were extracted and compared between groups. Clinical perceptual judgment was employed as the gold standard. Diagnostic accuracy of CPPS and HNR was evaluated through receiver operating characteristic curve analysis.
CPPS and HNR values were significantly lower in pwMS compared to HS, indicating impaired voice quality due to reduced harmonicity and increased aperiodicity. CPPS (threshold = 11.07 dB) demonstrated high sensitivity (0.76) and specificity (0.82) for detecting inadequate voice quality. HNR (threshold = 11.29 dB) exhibited lower sensitivity (0.73) and specificity (0.73). CPPS proved to be a more reliable measure than HNR for identifying vocal impairments and determining the need for rehabilitation.
Our findings confirm significant voice alterations in pwMS compared with a HS group in all collected measures. Although the data showed that the CPPS can be a valuable tool for voice assessment in multiple sclerosis, further studies should explore its applicability in broader populations and its integration into clinical protocols for voice assessment in pwMS
Effect of tinplated scraps surface-to-volume ratio on the efficiency of the electrolytic detinning process
No full textRecycling of steel scrap is a more competitive practice than steelmaking from iron ores. However, the presence of tramp elements within steel scrap affects the quality of the new steel produced. Tinplating of cans for drinks and food contains a high quantity of tin, which is responsible for adverse phenomena such as surface hot shortness and temper embrittlement. Thus, the development and application of a detinning process is necessary. This investigation focuses on studying an electrolytic detinning process performed in a 2.5M NaOH solution to decrease the tin content in tin-plated scrap. The process's performance was evaluated by varying input variables such as the process time, the applied current density, the operating temperature, and the material size (surface to volume ratio, S/V). The best process time for electrolytic de-tinning was estimated. The effect of the applied current density and S/V ratio on the process time and on the energy consumed by the process was evaluated at both room temperature and at 70 degrees C. The results showed that the tin content in tinned plates can be reduced to a negligible level (<0.01 wt-%) at 70 degrees C and the efficiency of de-tinning tin-plated scrap proved to increase with the S/V ratio
Farsi spazio nella città storica : analisi tipologica e progetto per la rigenerazione di Ragusa superiore
No full textLAUREA MAGISTRAL
Revitalizing Collective Resources in Mountain Areas Through Community Engagement and Knowledge Cocreation
No full textThe ongoing global and large-scale changes in markets, demographics, and use of
resources are impacting mountain peoples and regions. In mountain areas,
resources have been governed through community-based systems for resource management for centuries, ensuring stewardship and local decision-making over the resources. Due to the importance of such systems to mountain societies, there is a
need to understand local effects of global changes and reconfigure community-based resource management (CRM) to meet local needs while tackling global challenges. Changes include biodiversity loss and the climate crisis, as well as increasing social
and economic disparities. Studies on the role of knowledge cocreation in the process of CRM innovation in response to ongoing changes in mountain social–ecological systems are missing. This study aimed to explore the reconfigurations that enable CRM to foster sustainable development and thriving communities. The study focused on an intervention promoting community entrepreneurship in community-based tourism for the revitalization of collective resources in 2 mountain communities in Northern Italy. We adopted a transdisciplinary approach and a research action methodology to codesign the interventions and research. Data from focus groups, a survey, participatory activities, interviews, and participant observation were collected and
analyzed using a qualitative content analysis method. Results show that emerging reconfigurations in CRM include recognition of new values and uses of collective resources, inclusion of new stakeholders, and innovation of the organizational model, shifting the perspective from resource management to resource governance. The study recommends striking a balance between pushing innovation and increasing power imbalances. It is important to pay attention to the inclusivity of the process and to avoid excessive commodification of resources
Admiel Kosman, Siamo giunti a Dio
No full textInternational audienceSix poems from Israeli poet Admiel Kosman translated from the Hebrew into Italian. Selection of poems, presentation of the author, translation and notes by Davide Mano
Admiel Kosman, Siamo giunti a Dio
No full textInternational audienceSix poems from Israeli poet Admiel Kosman translated from the Hebrew into Italian. Selection of poems, presentation of the author, translation and notes by Davide Mano
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