On being bi- and multicultural: How do adolescents growing up in a multi-cultural environment organize and experience their different nationalities?

Conference given outside the academic context (2015)

On Being Bicultural ina Multicultural Environment

in Murdock, Elke (Ed.) Multiculturalism, Identity and Difference. Experiences of Culture Contact. (2016)

On Beta Models with Trust Chains

in Proceedings of the 7th IFIP WG 11.11 International Conference on Trust Management (2013)

In a type of interactions over the Internet, a user (the subject) is dependent on another user (the target), but not vice versa. The subject should therefore form an opinion about the target, before ... [more ▼]

In a type of interactions over the Internet, a user (the subject) is dependent on another user (the target), but not vice versa. The subject should therefore form an opinion about the target, before possibly initiating an interaction. The scenario wherein a subject only relies on information obtained from past interactions with the target, is well-studied and understood. In this paper, we formally analyze the implication of allowing recommendations (statements of a third party) as source of information. We identify the family of valid models that admit recommendations. This allows us to verify particular existing models that admit recommendations. [less ▲]

On biselective operations

Scientific Conference (2018, June 07)

See attached file

On boosting Kohler's ranking-by-choosing rule with a quantiles preordering

Scientific Conference (2015, February 06)

On Boundaries

Book published by Sternberg Press (2007)

In several theoretical essays, dialogues on collaborative projects and reflections on his own work, the architect Nikolaus Hirsch explores the critical transformations of contemporary space and its ... [more ▼]

In several theoretical essays, dialogues on collaborative projects and reflections on his own work, the architect Nikolaus Hirsch explores the critical transformations of contemporary space and its effects on spatial practice. On the threshold to disciplines such as visual and performative arts (“Planning the Unpredictable” with William Forsythe) he questions the notion of “boundary”: as a phenomenon of social and political discourse, as a conflict between collaboration and authorship, as well as a physical limitation that negotiates between stable and unstable conditions. Nikolaus Hirsch is a Frankfurt-based architect, educator, and curator. He was the Dean of Städelschule and Director of Portikus Kunsthalle in Frankfurt am Main. His architectural work includes the award-winning Dresden Synagogue (2001), Bockenheimer Depot Theater (with William Forsythe), Cybermohalla Hub (Delhi, 2012), and “Do We Dream Under The Same Sky” (Art Basel, 2015/LUMA Arles, 2017). Hirsch has curated „ErsatzStadt“ at Volksbühne Berlin (2005), numerous exhibitions at the Portikus, the Folly project for the Gwangju Biennale (2013), “Wohnungsfrage” at the Haus der Kulturen der Welt in Berlin (2015), and the German Pavilion at the Architecture Biennale 2020 in Venice. He is the co-editor of Institution Building, Superhumanity, and the Critical Spatial Practice series from Sternberg Press, and co-founder of e-flux architecture. [less ▲]

On capital stocks related to reciprocal shareholdings

E-print/Working paper (2014)

On certain finiteness questions in the arithmetic of Galois representations

Presentation (2017, June 07)

Let p be a fixed prime number. It has been known for a long time that there are only finitely many Galois extensions K/Q with Galois group a finite irreducible subgroup of GL_2(F_p^bar) that are imaginary ... [more ▼]

Let p be a fixed prime number. It has been known for a long time that there are only finitely many Galois extensions K/Q with Galois group a finite irreducible subgroup of GL_2(F_p^bar) that are imaginary and unramified outside p. In contrast, there are infinitely many such with Galois group inside GL_2(Z_p^bar), even if one restricts to ones coming from modular forms (this restriction is believed to be local at p). It is tempting to ask what happens "in between" F_p^bar and Z_p^bar, i.e. whether there is still finiteness modulo fixed prime powers. In the talk, I will motivate and explain a conjecture made with Ian Kiming and Nadim Rustom stating that the set of such Galois extensions `modulo p^m' (a proper definition will be given in the talk) coming from modular forms is finite. I will present partial results and a relation of the finiteness conjecture to a strong question by Kevin Buzzard. The talk is based on joint work with Ian Kiming and Nadim Rustom. [less ▲]

On characterizing the relationship between route choice behavior and optimal traffic control solution space

in Transportation Research Procedia (2017), 23

Explicitly including the dynamics of users' route choice behaviour in optimal traffic control applications has been of interest for researchers in the last five decades. This has been recognized as a very ... [more ▼]

Explicitly including the dynamics of users' route choice behaviour in optimal traffic control applications has been of interest for researchers in the last five decades. This has been recognized as a very challenging problem, due to the added layer of complexity and the considerable non-convexity of the resulting problem, even when dealing with simple static assignment and analytical link cost functions. In this work we establish a direct behavioural connection between the different shapes and structures emerging in the solution space of such problems and the underlying route choice behaviour. We specifically investigate how changes in the active equilibrium route set exert direct influence on the solution space's structure and behaviour. Based on this result, we then formulate and validate a constrained version of the original problem, yielding desirable properties in terms of solution space regularity. © 2017 The Authors. [less ▲]

On Choquet and Sugeno integrals as aggregation functions

in Grabisch, Michel; Murofushi, Toshiaki; Sugeno, Michio (Eds.) Fuzzy Measures and Integrals - Theory and Applications (2000)

This paper presents a synthesis on the essential mathematical properties of Choquet and Sugeno integrals viewed as aggregation functions. Some axiomatic characterizations are presented. Subfamilies of the ... [more ▼]

This paper presents a synthesis on the essential mathematical properties of Choquet and Sugeno integrals viewed as aggregation functions. Some axiomatic characterizations are presented. Subfamilies of the class of those integrals are also investigated. [less ▲]