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University of Luxembourg

Country: Luxembourg

University of Luxembourg

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201 Projects, page 1 of 41
  • Funder: EC Project Code: 101081455
    Funder Contribution: 1,432,800 EUR

    The Young International Academics postdoctoral programme (YIA) is a career development program proposed by the University of Luxembourg (Uni.lu) to nurture early-career postdoctoral applicants to gain momentum in interdisciplinary/intersectoral research. YIA applicants are international talents willing to propose and realize their own interdisciplinary research projects through a bottoms-up approach. YIA will welcome, in two calls, a total of 10 postdoctoral fellows with 36-month contracts over 5 years. YIA is open to all disciplines and sectors, involving Uni.lu in the drive towards an increased interdisciplinarity and intersectorality, which are strategic for Uni.lu, for the country and for Europe. A unique aspect of YIA is its integration into Uni.lu’s Institute for Advanced Studies-Luxembourg (IAS) created in 2019 to promote interdisciplinarity and outreach towards the society. This integration provides the YIA fellows with (1) a supervision for interdisciplinary and intersectoral research with more than 350 potential (co)-supervisors, and with about 350 potential public-private partners, (2) peer and cross-generational interactions/mentoring through the IAS fellows, invited distinguished senior scientists, early career researchers, and a mandatory academic or industrial secondment, and (3) a truly international flavour in an environment that cherishes diversity and excellence. YIA fellows recruited at Uni.lu are offered competitive contracts with mobility fellowships and access to excellent research infrastructures. A professor of Uni.lu provides supervision for the primary discipline of the applicant’s project and a co-supervisor covers the complementary discipline/sector. The YIA fellows are offered an “à la carte” training including mandatory courses, to suits the fellow’s career aspirations, increase the fellow’s interdisciplinarity and employability. The YIA programme will support a rapid ramp into a long-term Uni.lu funding of postdoctoral IAS fellows.

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  • Funder: EC Project Code: 101103110
    Funder Contribution: 191,760 EUR

    In the global construction industry, the consumption of aggregates (i.e. sands, gravels, or crushed stones) for concrete is ever-increasing, accompanied by the growing outputs of construction and demolition waste (CDW). Immoderate exploitation of natural resources and the disposal of CDW on land (landfill) both jeopardize sustainable development. Recycling CDW into recycled aggregate is a feasible and economical way to close the loop of supply and waste chains. In such context, RECOMPOSE intends to contribute towards the “European Green Deal” launched in 2019, by promoting a large-scale use of recycled aggregate concrete (RAC) for stimulating a circular economy in the European construction sector, reducing landfills, and saving natural resources. Due to the inferior mechanical properties and large variability of RAC, it has been mainly used in non-structural construction such as pavement. To promote wider applications of RAC, building slabs as a kind of secondary structural member are a good destination for RAC. By using steel-concrete composite floor systems, the resource efficiency is double strengthened by consuming recycled concrete and reducing the material consumption (CO2 emission) due to the superior load-bearing performance. Shear connections between steel sheeting-RAC composite slabs and steel beams are vital to the performance of composite beams and further to the entire building. The fellow will identify and model the behaviour of commonly-used headed-stud shear connections, addressing stochastic responses caused by high variability of RAC properties. Owing to the supervisor, Prof. Markus Schäfer’s, broad scientific and industrial network and his leadership role as a Eurocode developer, the dissemination and exploitation of the outputs will trigger the development of Eurocode 4 considering profiled sheeting-RAC composite floor systems. This will have a huge impact making possible a large-scale application of RAC in buildings in the following decades.

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  • Funder: EC Project Code: 219873
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  • Funder: EC Project Code: 101106914
    Funder Contribution: 175,920 EUR

    Given a mathematical object, a common theme is to study the symmetries of that object. In this project, the objects are compact topological surfaces, and the group of symmetries is the mapping class group. In this project, we will investigate simplicial graphs associated to surfaces, which have proved to be key tools in the study of both the algebraic and the geometric structure of mapping class groups. Studying the geometry of groups has proved to be a profound way to study their algebraic properties. We will focus on a graph called the pants graph, whose vertices represent pants decompositions of the surface (collections of homotopy classes of simple closed curves that cut the surface into spheres with three holes). The pants graph is significant not only in the study of mapping class groups, but also in studying the hyperbolic geometry of surfaces and 3-manifolds. The first part of the project is to understand how distances between vertices in the pants graph are related to the number of intersections between the corresponding pants decompositions. For a related graph, the curve graph, it is known that the distance between two vertices is bounded above by a logarithmic function of the number of intersections, but the methods do not immediately generalise to the pants graph. We will also investigate questions of computational complexity around computing distances in the pants graph. This part of the project will include a secondment at a computer science department. The second part of the project is to investigate maps from the pants graph to itself which preserve distances up to bounded error (such maps are called quasi-isometries). In a general metric space, the group of quasi-isometries is much bigger than the isometry group, but for most pants graphs, Bowditch proved that the two groups coincide, a property called quasi-isometric rigidity. We aim to prove that the same is true for three of the remaining unsolved cases.

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  • Funder: EC Project Code: 101056825
    Funder Contribution: 175,920 EUR

    The development of non-equilibrium statistical physics has provided a powerful tool to understand and describe the collective dynamics of a wide range of chemical, biological and social systems. In this framework, active matter has raised as one of the most significant topics in this domain, mainly addressing the features of many-body dynamics with self-propelled units such as bacteria colonies, bird flocks and pedestrians walks. Based on the observation of collective motion like size synchronization and wave propagation in epithelial tissues, we will introduce a new class of active matter models to understand the microscopic physical mechanisms underlying these dynamics. Motivated by the physical complexity of biological units, we will extend the concept of activity to the ability of the individual particle to change an internal degree of freedom, related to its size or to an energetic landscape, and we will explore the non-equilibrium phase transitions and collective behavior originating from this property. Our research project consists of three main objectives: (i) we will first extensively investigate the phase diagram of actively deforming particles, and compare it to the experimental observations to capture the essential mechanisms of phase transitions and wave propagation; (ii) we will then explore the interplay between phase synchronization and microscopic energy landscapes to understand the minimal ingredients for liquid-liquid phase separation, where two fluids spontaneously separate from a mixed phase; (iii) we will finally study the energetics of these models, quantifying the energy gain/cost of each phase and studying how phase transitions can be optimized. The exploration of these models represents a potential breakthrough in the physics of soft matter, clarifying the microscopic ingredients at the basis of several chemical and biological dynamics and introducing a fertile ground for the emergence of new physics.

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