ERC FUNDED PROJECTS

Densities in neutron star (NS) cores can reach up to ten times the density of a normal atomic nucleus, and the stabilising effect of gravitational confinement permits long-timescale weak interactions. This generates nucleonic matter that is extremely neutron-rich, and the exciting possibility of stable states of strange matter (hyperons or deconfined quarks). Our uncertainty about the nature of cold ultradense matter is encoded in the Equation of State (EOS), which can be mapped via the stellar structure equations to quantities like mass M and radius R that determine the exterior space-time. One very promising technique for measuring the EOS exploits hotspots that form on the NS surface due to the pulsar mechanism, accretion streams, or during thermonuclear explosions in the stellar ocean. As the NS rotates, the hotspot gives rise to a pulsation and relativistic effects encode information about the EOS into the pulse profile. Pulse Profile Modelling (PPM), which employs relativistic ray-tracing and Bayesian inference codes to measure M-R and the EOS, is being pioneered by NASA’s NICER telescope, which is poised to deliver its first results in 2019. Complexities, that have only become apparent with exposure to real data, mean that there is work to be done if we are to have confidence in the nominal 5-10% accuracy of NICER’s M-R results. AEONS will deliver this. The project will also look ahead to the next generation of large-area X-ray timing telescopes, since it is only then that PPM will place tight constraints on dense matter models. The sources these missions target, accreting neutron stars, pose challenges for PPM such as variability, surface pattern uncertainty, and polarimetric signatures. AEONS will develop a robust pipeline for accreting NS PPM and embed it in a multi-messenger EOS inference framework with radio and gravitational wave constraints. This will ensure that PPM delivers major advances in our understanding of the nature of matter.

2 425 000 €

Start date: 2020-06-01, End date: 2025-05-31

In the past decades, there has been a considerable rise in the number of apologies offered by states for injustices and human rights violations. Among transitional justice scholars, there is significant debate about how useful such apologies are. Whereas some have applauded these gestures as an important step in peacemaking processes, others have argued that they may not fit in all cultures and may even be a risky tool for peacemaking. Unfortunately, theorizing and research in the field of transitional justice is still in its infancy and has not systematically addressed questions of cross-cultural variability yet. So, at present, we do not know whether political apologies are a universally viable way to restore justice and harmony. My project addresses this challenge. Using an innovative, interdisciplinary, and multi-method approach with in-depth interviews, (experimental) surveys, and content analyses of apologies, I analyze whether there are universals in how political apologies are valued, expressed, and interpreted or whether this varies as a function of cross-cultural differences in key values (collectivism and individualism) and norms (face and honor). Based on these findings, I build a theoretical framework that will fundamentally advance our understanding of the potential value and role of apologies in transitional justice processes. This project breaks new ground because it is the first to take the difficult step to collect cross-cultural data to examine whether key assumptions regarding political apologies hold across cultures. It is also the first in this area to use a multi-method approach, which makes it possible to take into account the complex reality of political apologies. Combining insights from transitional justice, cross-cultural psychology and anthropology, this project places theorizing on transitional justice on a much firmer footing and paves the way to more cross-culturally valid models to restore justice and promote reconciliation.

1 917 713 €

Start date: 2016-09-01, End date: 2022-02-28

This anthropological study examines the reconfiguration of masculinities in urban Africa over the last 30 years. Focusing on how practices and discourses of empowerment and equality shape male subjectivities, this study builds upon a significant body of nuanced research on masculinities in Africa. Since the mid-1980s academic and public discourses have depicted African masculinity as both precarious and predatory. Economic insecurity, urbanization, shifting gender norms, and growing gender parity have accompanied claims that African masculinity is ‘in crisis’. More recently, new stories of urban men embracing responsible fatherhood, condemning intimate partner violence, and demanding homosexual rights have emerged as exemplars of progressive possibility. To disentangle these seemingly competing claims about African masculinities and shed light on the scientific, political, and economic projects that shape them, this research theorises that the discourses and practices that pathologise and politicise masculinity are simultaneously performing and producing gendered selves on multiple scales in the name of gender equality. Recently, ‘male involvement’ has become a rallying cry throughout the vast global development assemblage, around which governments, NGOs, research networks, activists, and local communities fight gender inequality to promote health, economic development, and human rights. In this research, a range of male-involvement initiatives provides a lens through which to study how masculinities are diversely imagined, (re)configured, and performed through men’s engagements with this assemblage, in both its local and global manifestations. Multi-sited ethnographic research will focus on six cities where the PI has active research ties: Nairobi and Kisumu, Kenya; Johannesburg and Durban, South Africa; and Dar es Salaam and Mwanza, Tanzania.

1 999 830 €

Start date: 2015-09-01, End date: 2020-08-31

The Endoplasmic Reticulum (ER) membrane in all eukaryotic cells has an intricate protein network that facilitates protein biogene-sis and homeostasis. The molecular complexity and sophisticated regulation of this machinery favours study-ing it in its native microenvironment by novel approaches. Cryo-electron tomography (CET) allows 3D im-aging of membrane-associated complexes in their native surrounding. Computational analysis of many sub-tomograms depicting the same type of macromolecule, a technology I pioneered, provides subnanometer resolution insights into different conformations of native complexes. I propose to leverage CET of cellular and cell-free systems to reveal the molecular details of ER protein bio-genesis and homeostasis. In detail, I will study: (a) The structure of the ER translocon, the dynamic gateway for import of nascent proteins into the ER and their maturation. The largest component is the oligosaccharyl transferase complex. (b) Cotranslational ER import, N-glycosylation, chaperone-mediated stabilization and folding as well as oligomerization of established model substrate such a major histocompatibility complex (MHC) class I and II complexes. (c) The degradation of misfolded ER-residing proteins by the cytosolic 26S proteasome using cytomegalovirus-induced depletion of MHC class I as a model system. (d) The structural changes of the ER-bound translation machinery upon ER stress through IRE1-mediated degradation of mRNA that is specific for ER-targeted proteins. (e) The improved ‘in silico purification’ of different states of native macromolecules by maximum likelihood subtomogram classification and its application to a-d. This project will be the blueprint for a new approach to structural biology of membrane-associated processes. It will contribute to our mechanistic understanding of viral immune evasion and glycosylation disorders as well as numerous diseases involving chronic ER stress including diabetes and neurodegenerative diseases.

2 496 611 €

Start date: 2017-04-01, End date: 2022-06-30