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Public access from Jun 8, 2023
Università della Svizzera italiana

Paiements extérieurs et crises de dette : Vers un nouvel ordre monétaire international?

Zio, Adonija ; Bradley, Xavier (Dir.) ; Cencini, Alvaro (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020ECO013.

The sovereign debt crisis is one of the most recurrent crises of the capitalist system. These crises emerge after a strong accumulation of debt by countries. The payment of this debt most often causes internal distortions and financial instability. Studies related to these issues favour the microeconomic approach and explain that the imprudent behaviour of debtors and creditors is at the basis...

Università della Svizzera italiana

Analyzing system performance with probabilistic performance annotations

Rogora, Daniele ; Carzaniga, Antonio (Dir.) ; Soulé, Robert (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020INFO024.

Understanding the performance of software is complicated. For several performance metrics, in addition to the algorithmic complexity, one must also consider the dynamics of running a program within different combinations of hardware and software environments. Such dynamical aspects are not visible from the code alone, and any kind of static analysis falls short. For example, in reality, the...

Università della Svizzera italiana

Approximation algorithms for survivable network design

Jabal Ameli, Afrouz ; Grandoni, Fabrizio (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2021 ; 2021INFO005.

Many relevant discrete optimization problems are believed to be hard to solve efficiently (i.e. they cannot be solved in polynomial time unless P=NP). An approximation algorithm is one of the ways to tackle these hard optimization problems. These algorithms have polynomial running time and compute a feasible solution whose value is within a proven factor (approximation factor) of the optimal...

Università della Svizzera italiana

From facet-based to visualised digital library interfaces : an empirical study of user experiences with digital libraries

Barifah, Maram Hassan ; Crestani, Fabio (Dir.) ; Landoni, Monica (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2021 ; 2021INFO004.

Digital library (DL) systems in the last decade have provided an unprecedented access to library content that were confined to their physical spaces. The last twenty years of the DL system renovation have witnessed several generations of online catalogs from the Online Public Access Catalogue (OPAC) late 1980s, to the next generation catalog systems (NGC). DL systems are extensively used to...

Università della Svizzera italiana

Predicting failures in complex multi-tier systems

Xin, Rui ; Pezzè, Mauro (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020INFO017.

Complex multi-tier systems are composed of many distributed machines, feature multi-layer architecture and offer different types of services. Shared complex multi-tier systems, such as cloud systems, reduce costs and improves resource utilization efficiency, with a considerable amount of complexity and dynamics that challenge the reliability of the system. The new challenges of complex...

Università della Svizzera italiana

Less is more : efficient hardware design through Approximate Logic Synthesis

Scarabottolo, Ilaria ; Pozzi, Laura (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020INFO023.

As energy efficiency becomes a crucial concern in almost every kind of digital application, Approximate Computing gains popularity as a potential answer to this ever-growing energy quest. Approximate Computing is a design paradigm particularly suited for error- resilient applications, where small losses in accuracy do not represent a significant reduction in the quality of the result. In these...

Università della Svizzera italiana

Economic complexity and international market : How do they matter in the national dynamics?

Maggi, Federica ; Maggi, Rico (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020ECO012.

This thesis contributes to the International Economics by considering how the openness of an economy and the linkages with other countries matter for the local economic growth. The first strength and the fil rouge of this study is the use of the economic complexity as a measure to identify the strategic sectors that generate larger spillovers and benefits to the economy. Secondly, the use of...

Università della Svizzera italiana

Scaling blockchains

Fynn, Enrique ; Pedone, Fernando (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2021 ; 2021INFO003.

Blockchains are a new type of state machine replication that have raised interesting challenges. A replicated state machine (RSM) is a well-established approach to building fault-tolerant systems. Because each replica needs to execute the same set of instructions to transition through the same state changes, adding more replicas does not translate directly to an increase in performance. On top...

Università della Svizzera italiana

Declarative performance testing automation : automating performance testing for the DevOps era

Ferme, Vincenzo ; Pautasso, Cesare (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2021 ; 2021INFO002.

Recent trends in industry show increasing adoption of Development and Operations (DevOps) practices. Reasons for increasing DevOps adoption are the focus on the creation of cross-functional teams, and the ability to release high-quality software at a fast pace. Alongside the adoption of DevOps, performance testing continues to evolve to meet the growing demands of the modern enterprise and its...

Università della Svizzera italiana

Statistical solutions for regressions-type models with big spatial data

Ghiringhelli, Chiara ; Mira, Antonietta (Dir.) ; Arbia, Giuseppe (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020ECO011.

These last decades have witnessed an explosion of data collection and diffusion in all fields of human society. In many scientific fields researchers are becoming aware of a big data problem and of the need to manage it properly, combining the tools offered by statistics, computer, data science and informatics. This is particularly true for geo-located data, which can be collected in a...