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Université de Neuchâtel

Monolithically integrated interferometer for optical displacement measurement

Hofstetter, Daniel ; Dändliker, R. (Dir.)

Thèse de doctorat : Université de Neuchâtel, 1996.

A monolithically integrated optical displacement sensor in the GaAs/AlGaAs material system has been developed, fabricated and characterized. The device was a double Michelson interferometer with an integrated light source, photodetectors, couplers and phase shifters. A key point of the work was the development of a single growth-step distributed Bragg reflector laser which served as the light...

Università della Svizzera italiana

Observable dynamic compilation

Zheng, Yudi ; Binder, Walter (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2017 ; 2017INFO003.

Managed language platforms such as the Java Virtual Machine rely on a dynamic compiler to achieve high performance. Despite the benefits that dynamic compilation provides, it also introduces some challenges to program profiling. Firstly, profilers based on bytecode instrumentation may yield wrong results in the presence of an optimizing dynamic compiler, either due to not being aware of...

Università della Svizzera italiana

Causal loops : logically consistent correlations, time travel, and computation

Ämin, Baumeler ; Wolf, Stefan (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2017 ; 2017INFO002.

Causal loops are loops in cause-effect chains: An effect can be the cause of that effect's cause. We show that causal loops can be unproblematic, and explore them from different points of view. This thesis is motivated by quantum theory, general relativity, and quantum gravity. By accepting all of quantum theory one can ask whether the possibility to take superpositions extends to causal...

Università della Svizzera italiana

INDIGO : a generalized model and framework for performance prediction of data dissemination

Garg, Kamini ; Jazayeri, Mehdi (Dir.) ; Giordano, Silvia (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2017 ; 2017INFO001.

According to recent studies, an enormous rise in location-based mobile services is expected in future. People are interested in getting and acting on the localized information retrieved from their vicinity like local events, shopping offers, local food, etc. These studies also suggested that local businesses intend to maximize the reach of their localized offers/advertisements by pushing them...

Università della Svizzera italiana

Efficient multi-bounce lightmap creation using GPU forward mapping

Schärfig, Randolf ; Hormann, Kai (Dir.) ; Stamminger, Marc (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2016 ; 2016INFO008.

Computer graphics can nowadays produce images in realtime that are hard to distinguish from photos of a real scene. One of the most important aspects to achieve this is the interaction of light with materials in the virtual scene. The lighting computation can be separated in two different parts. The first part is concerned with the direct illumination that is applied to all surfaces lit by a...

Université de Neuchâtel

SoftwIre integration : an approach to service composition through distributed representations of arbitrary-length business ontologies

Ludolph, Hendrik ; Kropf, Peter (Dir.) ; Babin, Gilbert (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

The demand for Software as a Service is ever increasing. With this demand comes a proliferation of third-party service offerings to fulfill it. It thus becomes crucial for organizations to find and select the right service to be integrated into their existing tool landscapes. Ideally, this is done automatically and flexibly. The objective is to always provide the best possible support to changing...

Université de Neuchâtel

Multi-level energy efficiency for heterogeneous data centers

Kurpicz-Briki, Mascha ; Felber, Pascal (Dir.) ; Sobe, Anita (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

The ICT sector has an important impact on global energy consumption (building devices, building networks, operation, air-conditioning and more). Studies show that cloud computing as a whole consumes more energy than entire countries like Germany or India. Furthermore, recent estimates have shown that the cloud computing sector, and thus the energy consumed by data centers, is still...

Università della Svizzera italiana

Software redundancy : what, where, how

Mattavelli, Andrea ; Pezzè, Mauro (Dir.) ; Carzaniga, Antonio (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2016 ; 2016INFO007.

Software systems have become pervasive in everyday life and are the core component of many crucial activities. An inadequate level of reliability may determine the commercial failure of a software product. Still, despite the commitment and the rigorous verification processes employed by developers, software is deployed with faults. To increase the reliability of software systems, researchers...

Università della Svizzera italiana

On the hausdorff and other cluster Voronoi diagrams

Khramtcova, Elena ; Papadopoulou, Evanthia (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2016 ; 2016INFO005.

The Voronoi diagram is a fundamental geometric structure that encodes proximity information. Given a set of geometric objects, called sites, their Voronoi diagram is a subdivision of the underlying space into maximal regions, such that all points within one region have the same nearest site. Problems in diverse application domains (such as VLSI CAD, robotics, facility location, etc.) demand...

Università della Svizzera italiana

A comprehensive approach to MPSoC security : achieving network-on-chip security : a hierarchical, multi-agent approach

Lukovic, Slobodan ; Sami, Mariagiovanna (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2012 ; 2012INFO005.

Multiprocessor Systems-on-Chip (MPSoCs) are pervading our lives, acquiring ever increasing relevance in a large number of applications, including even safety-critical ones. MPSoCs, are becoming increasingly complex and heterogeneous; the Networks on Chip (NoC paradigm has been introduced to support scalable on-chip communication, and (in some cases) even with reconfigurability support. The ...