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Università della Svizzera italiana

Perspectives on the measurement problem : perspectives from the measurement problem

Hansen, Arne ; Wolf, Stefan (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020INFO008.

In quantum mechanics, the measurement problem is commonly regarded as reason for deep concern. It seems that, either, the problem can be solved and there is hope for quantum mechanics, or the theory better be left behind in search of another one. We investigate the prospect of finding a solution to the measurement problem—within quantum mechanics, as well as in theoretical frameworks beyond...

Université de Fribourg

Of circuits and brains: the origin and diversification of neural architectures

Martinez, Pedro ; Sprecher, Simon G.

In: Frontiers in Ecology and Evolution, 2020, vol. 8, p. 82

Nervous systems are complex cellular structures that allow animals to interact with their environment, which includes both the external and the internal milieu. The astonishing diversity of nervous system architectures present in all animal clades has prompted the idea that selective forces must have shaped them over evolutionary time. In most cases, neurons seem to coalesce into specific ...

Université de Fribourg

Ultrafast nonequilibrium evolution of excitonic modes in semiconductors

Murakami, Yuta ; Schüler, Michael ; Takayoshi, Shintaro ; Werner, Philipp

In: Physical Review B, 2020, vol. 101, no. 3, p. 035203

We study the time evolution of excitonic states after photoexcitation in the one- dimensional spinless extended Falicov-Kimball model. Several numerical methods are employed and benchmarked against each other: time-dependent mean-field simulations, the second-Born approximation (2BA) within the Kadanoff-Baym formalism, the generalized Kadanoff-Baym ansatz (GKBA) implemented with the 2BA, and...

Università della Svizzera italiana

The digital birth of an African city : the case of Douala

Pucciarelli, Marta ; Cantoni, Lorenzo (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2019 ; 2019COM003.

This dissertation focuses on the online communication and representation of a digital city in Africa: Douala, the largest city of the Republic of Cameroon. In particular, it explores the evolution of the web-based reproduction (Couclelis, 2004) of Douala, the largest city of the Republic of Cameroon, from a chronological, spatial and representational perspective, with the purpose of...

Université de Neuchâtel

Children as Investigators of Brunerian “Possible Worlds”. The Role of Narrative Scenarios in children’s Argumentative Thinking

Iannaccone, Antonio ; Perret-Clermont, Anne-Nelly ; Convertini, Josephine

In: Integrative Psychological and Behavioral Science, 2019, vol. 53, no. 4, p. 679-693

Referring to the notion of “possible worlds”, the paper aims to investigate an intriguing aspect of children’s thinking: the function that play narrative scenarios in sharing with other partners (peers and adults) the child’s understanding of the physical and social reality. The idea of possible worlds to which this work relates, can be considered in some way as the legacy of Piaget’s...

Université de Fribourg

Laboratory based XAS measurements, electron-induced double K-shell ionization of Sc, Cr and Cu : and, Chemical sensitivity of photoinduced Kʰβ hypersatelite transition in Cr compounds

Zeeshan, Faisal ; Dousse, Jean-Claude (Dir.)

Thèse de doctorat : Université de Fribourg, 2017 ; no. 2052.

The present PhD thesis includes three different projects which belong to the domain of inner-shell atomic physics and high energy resolution X-ray spectroscopy. The first project consists of a series of in-house measurements of the characteristic K and L X-ray absorption spectra (XAS) of several 3d, 4d and 5d transition metals. For this project the target chamber of the von Hamos curved crystal...

Université de Fribourg

First-principles studies of spin-orbital physics in pyrochlore oxides

Shinaoka, Hiroshi ; Motome, Yukitoshi ; Miyake, Takashi ; Ishibashi, Shoji ; Werner, Philipp

In: Journal of Physics: Condensed Matter, 2019, vol. 31, no. 32, p. 323001

The pyrochlore oxides A2B2O7 exhibit a complex interplay between geometrical frustration, electronic correlations, and spin–orbit coupling (SOC), due to the lattice structure and active charge, spin, and orbital degrees of freedom. Understanding the properties of these materials is a theoretical challenge, because their intricate nature depends on material-specific details and quantum...

Université de Neuchâtel

Rubidium vapour-cell frequency standards : metrology of optical and microwave frequency references

Moreno, William ; Mileti, Gaetano (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2019.

This thesis concerns the development, study, and optimisation of compact and high-performance frequency references based on rubidium (Rb) vapour cells1. More specially, two Rb vapour-cell frequency references are studied: an optical-frequency reference at 1.5 μm and a double-resonance pulsed optically pumped (POP) atomic clock. The use of vapour cells allows compact frequency...

Haute école de santé Genève

Lésés médullaires : les motivations perçues lors de la pratique d'une activité physique de loisir. Une revue qualitative : travail de Bachelor

Aeberhard, Aurélie ; Herrmann, Natacha ; Cuvelier, Virginie (Dir.)

Mémoire de bachelor : Haute école de santé Genève, 2017.

Introduction : L’activité physique (AP) permet d’améliorer la qualité de vie car elle agit sur la santé physique et psychique ainsi que sur la sphère sociale des individus. Malheureusement, les lésés médullaires (LM) diminuent leur taux d’AP après leur lésion, ce qui accélère l’apparition de maladies liées à la sédentarité. A cela s’ajoutent les complications dues au...