In: International journal for numerical methods in biomedical engineering, 2021, vol. 37, no. 10, p. 23
In electrocardiography, the “classic” inverse problem is the reconstruction of electric potentials at a surface enclosing the heart from remote recordings at the body surface and an accurate description of the anatomy. The latter being affected by noise and obtained with limited resolution due to clinical constraints, a possibly large uncertainty may be perpetuated in the inverse ...
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In: Journal of computational physics, 2021, vol. 428, p. 15 p
In this article, we consider fast direct solvers for nonlocal operators. The pivotal idea is to combine a wavelet representation of the system matrix, yielding a quasi- sparse matrix, with the nested dissection ordering scheme. The latter drastically reduces the fill-in during the factorization of the system matrix by means of a Cholesky decomposition or an LU decomposition, respectively. This...
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In: Journal of Services Marketing, 2020, vol. 34, no. 3, p. 299-316
Purpose – The growing service sector has experienced several revolutions that have transformed the way services are created and delivered. In parallel, services increasingly pique the interest of scholars, resulting in an expanding body of knowledge. Accordingly, it is time to reflect on extant service research, assess its boundaries, and think about its future. This paper aims to consider...
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Thèse de doctorat : Université de Fribourg, 2020.
The dissertation examines the contemporary environmental governance complex covering the transboundary area of the Carpathians and Danube with a focus on ecoregional approach. The strategic importance of these two geographical objects accounts for an intertwined system of varied institutions and initiatives contributing to addressing ecological challenges in the area through international...
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In: Formal Methods in System Design, 2015, vol. 47, no. 1, p. 26-50
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In: The Depositional Record, 2021, vol. 7, no. 1, p. 25-51
The Opalinus Clay is an argillaceous to silty mudstone formation, notable in Switzerland as the selected host rock for deep geological disposal of radioactive waste. Its upper bounding unit (Passwang Formation and eastern equivalents) is composed of successions of mudstone, sandy bioclastic marl and limestone separated by ooidal ironstone beds. The lithostratigraphic transition is diachronous...
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Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020INFO009.
In the unfitted finite element methods, traditionally we can use Nitsche's method or the method of Lagrange multipliers to enforce the boundary/interface conditions. In this work, we present tailored multilevel methods for solving the problems stemming from either of these discretizations. Generally, multigrid methods require a hierarchy of finite element (FE) spaces which can be created...
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In: The Oxford Handbook of Global Justice, 2020, p. 99-121
International human rights law and practice reveal an ambivalent approach to the personal scope of human rights: human rights are often less equal or general than they claim and are claimed to be. The inequalities of human rights are of two kinds: some vulnerable individuals are also protected by special rights, thus drawing an internal boundary within the scope of human rights-holders, while...
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In: Physical Review B, 2020, vol. 101, no. 19, p. 195118
We consider a two-band spinless model describing an excitonic insulator (EI) on the two-dimensional square lattice with anisotropic hopping parameters and electron-phonon (el-ph) coupling, inspired by the EI candidate Ta2NiSe5. We systematically study the nature of the collective excitations in the ordered phase which originates from the interband Coulomb interaction and the el-ph coupling. ...
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In: Geometriae Dedicata, 2020, vol. 206, no. 1, p. 151–179
Let Sg,n be a surface of genus g>1 with n>0 punctures equipped with a complete hyperbolic cusp metric. Then it can be uniquely realized as the boundary metric of an ideal Fuchsian polyhedron. In the present paper we give a new variational proof of this result. We also give an alternative proof of the existence and uniqueness of a hyperbolic polyhedral metric with prescribed curvature in a...
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