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The Spatial Politics of Philanthropic Action in Turin: The imaginaries of sustainable development and social innovation in the institutionalisation of alternative cultural production as a field of urban governance.
No full textL'abstract è presente nell'allegato / the abstract is in the attachmen
Statistical Analysis of end-to-end Route Feasibility in Converged Metro–Access Optical Networks
Get PDFDisaggregation of the Radio Access Network (RAN) imposes stringent fronthaul latency and physical-layer performance requirements on supporting the optical transport infrastructure. This paper evaluates the feasibility of Access–DU–Access (A–DU–A) routes in a converged metro–access optical network, jointly considering Bit Error Rate (BER) and the fronthaul latency constraint of 250 μs, considering functional split 7.2 defined by 3GPP. Two deployment scenarios are examined: (i) DU/CU hosting at metropolitan Points of Presence (PoPs) and (ii) DU/CU hosting at external data centers (DCs). Using Cassini and Phoenix whiteboxes hosting pluggable DCO transceivers (TRxs), the analysis quantifies the impact of modulation format, BER thresholds, and end-to-end propagation latency on service feasibility. Results show that metro-based hosting supports 87.9% latency-compliant routes compared to 47.6% under data-center hosting, and that Cassini consistently provides higher BER feasibility across modulation formats. The findings demonstrate that physical-layer impairments and functional placement must be jointly optimized to support latency-constrained, virtualized RAN transport in converged metro–access networks
Monitoraggio Predittivo dell'Adsorbimento di Lipidi su Matrici di Biochar: Un Approccio Basato su Pseudo-Spettri Raman e Autoencoder
Get PDFIl presente lavoro analizza la capacità del biochar di agire come adsorbente selettivo per sostanze organiche apolari, con particolare focus sull'interazione con i lipidi. Grazie alla sua natura lipofila e a una porosità multi-scala (macropori e micropori), il biochar è in grado di sequestrare grassi e oli attraverso meccanismi di diffusione intraparticolare e forze di Van der Waals. Per superare i limiti della caratterizzazione tradizionale di campioni "sporchi" provenienti da siti di bonifica, viene introdotta la metodologia dello pseudo-spettro Raman. Attraverso la sovrapposizione matematica del segnale del biochar puro (bande D e G) con le firme spettrali caratteristiche dei grassi (regione 2800-3000 cm^{-1} e picco dell’estere a 1740 cm^{-1}), è stato generato un dataset sintetico etichettato per l'addestramento di modelli di intelligenza artificiale. L'obiettivo è istruire un autoencoder a discriminare la matrice pura dal contaminante, trasformando il biochar in un sensore passivo capace di quantificare il proprio livello di saturazione in tempo reale
Bayesian optimisation of an opposition control strategy in a fully turbulent channel flow
No full textThe proposed study aims to optimise a real-time opposition control strategy to reduce the intensity of near-wall sweep events by applying a Bayesian optimisation algorithm. The experiments were conducted in a fully turbulent channel flow characterised by a friction Reynolds number of 350
. Sweep events were identified using a gradient-based detection technique and controlled via a wall-normal jet. An open-loop control logic was implemented and the control parameters (frequency, voltage amplitude and delay time) were optimised, within the bounds imposed by the experimental set-up, to bring the maximum sweep events intensity reduction up to 54%
, with a robust cost function. The effects of the control were observed by analysing the conditionally averaged sweep events at various streamwise locations downstream of the actuation point. Moreover, the conditional analysis was applied to the cross-correlation function of velocity signals highlighting the large reduction of the sweep event convection velocity during the blowing phase of the jet. An overall energy increase has been found in the conditionally averaged energy spectra for the controlled case. The analysis of conditionally averaged wavelet spectra revealed that the control, by interrupting the natural evolution of the sweep event, initially leads to a reduction in the energy associated with it, followed by a subsequent increase during the development of the jet-blowing phase
Pressure-less joining materials for SiC-based components for light water reactors
Get PDFSilicon carbide fiber-reinforced composites (SiC/SiC) are leading candidates to replace zirconium-based alloys as cladding in light water reactors (LWR), owing to their exceptional oxidation resistance and mechanical performance under accident conditions.
However, pressure-less joining methods compatible with the extreme chemical and thermal environment of LWRs remain a major technological hurdle.
This work evaluates two promising joining materials—Mo-wrap (a MoSi2/Si composite) and SAY (a silica–alumina–yttria glass-ceramic)—under simulated LWR conditions.
Joining was performed using both conventional furnaces and laser-assisted techniques.
Joint integrity and microstructure were assessed by SEM/EDS and X-ray computed tomography. Hydrothermal stability was evaluated in static and flowing-water (loop) autoclaves up to 30 days at 330 °C and 150–155 bar.
Mo-wrap joints showed partial degradation due to silicon dissolution, while SAY joints retained good structural integrity in static tests but suffered phase-selective corrosion under flowing conditions, with keivite emerging as the most stable crystalline phase.
Laser-processed amorphous SAY joints exhibited improved corrosion resistance, though still limited under prolonged exposure.
These findings advance the understanding of joining performance in nuclear-relevant environments and support the development of accident-tolerant fuel cladding
Simulation of runaway electron generation in the Day-0 scenario of DTT
Get PDFFormation of Runaway electrons (REs) during tokamak disruptions is a significant challenge in fusion research, as they can locally damage the plasma-facing components by applying thermal loads of tens of MJ per square meter, possibly leading to significant melting. This work investigates the current quench phase of disruptions and the likelihood of RE generation and multiplication in the Day-0 scenario (plasma current Ip=2 MA) of the Divertor Tokamak Test (DTT), using the non-linear magnetohydrodynamic code JOREK. Our results from 2D (toroidally symmetric) simulations indicate that, in this initial low-current scenario, RE generation is minimal to negligible when the impurities injected through disruption mitigation systems are adequately limited. This suggests that DTT’s early operational phase poses a low RE risk, contributing to operational safety in this regard before transitioning to full power scenarios (Ip=5.5 MA). In addition to providing an initial RE safety benchmark for DTT, this study lays the groundwork for further research at higher operational currents and for the estimation of heat loads caused by RE beams on plasma-facing components, essential for guiding the design and strategic placement of mitigation elements such as sacrificial limiters
Connecting Natural Fibers and Territories Through Design
Get PDFThis paper presents the research project Circular Design for Natural Fibers (CD4NF), which promotes the transition towards Circular Economy practices in Made in Italy productions across the furniture, textile, and construction sectors, focusing on the use of natural fibers derived from the Italian agroindustrial system. The study explores how the development of new bio-based materials and products—framed within sustainability principles and aligned with Circular Economy and Circular Design approaches—represents a dynamic area of debate for the design discipline, raising critical questions around technologies, contexts, and development paths. The paper also illustrates the design-driven methodology adopted in the project, particularly in the application of systemic design to the cases of bamboo and hemp, and discusses its integration with contributions from other disciplines. Finally, it emphasizes the connection between local supply chains and their territories, understood not only as productive ecosystems but also as expressions of cultural heritage, thereby enhancing the value of Made in Italy design
Oltre la Scatola Nera: L'Emergenza dello Pseudo-Spettro come Archetipo dell'Intelligenza Artificiale per l'Analisi Spettrale Non Supervisionata Dalla Mineralogia all'Astrofisica
Get PDFIl presente lavoro formalizza il concetto di "Pseudo-Spettro", una metodologia innovativa emersa nel corso di una serie di studi condotti nel 2025 sull'applicazione di architetture di Deep Learning (Autoencoder Convoluzionali, Densi e Transformer) alla spettroscopia. Tradizionalmente, gli autoencoder vengono utilizzati per la riduzione della dimensionalità o il denoising; qui, proponiamo un cambio di paradigma: l'uso dello spazio latente per generare firme spettrali archetipiche. Lo pseudo-spettro viene definito come la ricostruzione operata dal decoder a partire dal centroide lineare di un cluster nello spazio latente. Attraverso l'analisi di dataset eterogenei — che spaziano dalla mineralogia (Granati, Feldspati) alla scienza dei materiali (Biochar) fino all'astrofisica (Libreria MILES) — dimostriamo che lo pseudo-spettro non è una semplice media statistica, ma l'interpretazione ideale e priva di rumore che il modello ha appreso di una specifica classe di dati. I risultati evidenziano come questa tecnica permetta di "aprire la scatola nera" dell'intelligenza artificiale, fornendo ai ricercatori uno strumento tangibile per visualizzare la logica decisionale del modello e trasformando l'AI da un mero classificatore a una lente interpretativa per la scoperta scientifica
Mainstreaming a regional planning discourse within the UN technical assistance programme: Ernest Weissmann and the post-war international collaboration
No full textThe article investigates the role of Ernest Weissmann in diffusing and
institutionalizing a regional planning discourse within the United Nations
technical assistance mechanism between 1950 and 1965. Heading a
pioneering body within the United Nations Department of Social Affairs,
Housing, Building and Planning Branch (HBP), as the article shows, gradually
became a valuable vehicle for integrating Weissmann’s pre-war CIAM ideas
on ‘human planning’ into the UN developmentalist post-war endeavour in
Global Urban Governance. The process is followed through Branch’s
publication Housing, Building and Planning, which casts light on the process
of concatenation of ‘global experts’ and their missions in India (1954), Puerto
Rico (1956), and Japan (1958). Finally, the research examines Weissmann’s
bureaucratic efforts in establishing the United Nations Centre for Housing,
Building and Planning in 1965 as an intellectual base for outsourcing
technical knowledge for the newly established United Nations Development
Program. By situating Weissmann’s efforts within the broader
reorganization of the UN’s development apparatus during the mid-century,
the study highlights the role of bureaucratic agency in shaping mechanisms
for the circulation of technical assistance and planning knowledge across
national contexts
Perspectives on the sustainable organisation and management of the Olympic Games: from Turin 2006 to Brisbane 2032
No full textIncreasing concerns about sustainable development and climate change have pushed public and private actors and organisations to intensify their efforts to embed these issues in their plans, projects, programmes, and strategies. Within this context, the article examines sustainability as it relates to the Olympic Games, providing an overview of the measures taken by the International Olympic Committee (IOC) and the attention that these events' organisers have paid to integrating it over time. A comparative analysis of two cases – the 2006 Winter Olympic Games in Turin, Italy, and the 2032 Summer Olympic Games
in Brisbane, Australia – has been developed to identify specificities and opportunities in staging such a global event, examining diverse and interconnected aspects of sustainability that could help evaluate it in future games. The article highlights that interpretations of the meaning of sustainability change over time and vary across stakeholders and
that the long-term impact assessment of the legacy of such events requires further research