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See detailAssociate Editor, Journal of Risk and Financial Management
Wolff, Christiaan UL

Diverse speeches and writings (2020)

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See detailPeer influence in individuals with developmental disabilities
Zurbriggen, Carmen UL

Scientific Conference (2020, August)

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See detailPOST-COMMUNIST EUROPE AND THE THEORY OF RECOGNITION: MODERN STRUGGLES FOR RECOGNITION OF THE CROATIAN PEOPLE
Bebić, Džoen Dominique UL

Doctoral thesis (2020)

Political Philosophy has been analysing various political scenarios and governments for centuries. It is therefore very surprising that contemporary political philosophy has not contributed much to the ... [more ▼]

Political Philosophy has been analysing various political scenarios and governments for centuries. It is therefore very surprising that contemporary political philosophy has not contributed much to the analysis of the social experiences of the Croatian people during the war and events leading up to the war from 1990 to 1995 compared to other sciences. This research thus envisions to use the philosophical theory of recognition (and reification) to fulfil the extremely difficult task of analysing the social experiences and struggles for recognition of the Croatian people from the Habsburg monarchy until the end of the war of the Former Yugoslavia. As recognition as a concept was elaborated by various philosophers, this research presents different concepts of recognition developed by Rousseau, Fichte, Hegel, and Taylor while focusing on the recognition theory conceptualised by Honneth. This allows for the reconstruction of the evolution of the theory of recognition and the presentation of the interconnectedness of these different interpretations. Through the presentations of the different interpretations and the subsequent arguments and illustrations demonstrating their inadequacies to grasp the complex social experiences of the Croatian people throughout the different time periods, only Honneth’s theory of recognition can ultimately be used to capture and contextualise all the different forms of disrespect the Croatian people faced as well as the struggles for social appreciation of the Croatian culture and language and legal recognition of their right of political participation followed as a result of the deeply felt psychological consequences of the endured long-term disrespects. The extremely violent war of the Former Yugoslavia, however, falls out of what recognition theory can offer. This is where Honneth’s interpretation of Lukács reification theory comes to the fore. Using Honneth’s interpretation of reification, the different social experiences of the Croatian people during the war on the Croatian territory (1990-1992) and the territory of Bosnia-Herzegovina (1992-1995) are analysed and examined through the three forms of reification namely intersubjective reification of people, objective reification of their environment and self-reification of the perpetrators. As the relations between the Serbian and Croatian population of Croatia and Bosnia-Herzegovina remain rather tense to this day, this research also adopts Honneth’s conditions for peace and reconciliation between two states. While taking into account the valuable and important attempts of peace and reconciliation in the region, this research tries to offer an additional path of reconciliation between the Serbian and Croatian state and people in Croatia and in Bosnia-Herzegovina. A future joint research between representatives of the nations part of the Former Yugoslavia would allow for an objectification of the existentially subjective experiences of all the different nations and subsequently also offer a new path of reconciliation in the region. [less ▲]

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See detailFirst-principles description of the exciton-phonon interaction: A cumulant approach
Cudazzo, Pier Luigi UL

in Physical Review. B (2020), 102

Electron-phonon coupling leads to intriguing effects in the spectra of materials. Current approximations to calculate spectra most often describe this coupling insufficiently. Starting from basic ... [more ▼]

Electron-phonon coupling leads to intriguing effects in the spectra of materials. Current approximations to calculate spectra most often describe this coupling insufficiently. Starting from basic equations of many-body perturbation theory, we derived a cumulant formulation for neutral excitation spectra that contains excitonic effects and the coupling between excitons and phonons. The cumulant approach allows us to include dynamical effects arising from the electron-phonon coupling in a simple and intuitive way. It can be implemented as a postprocessing of state-of-the-art GW-plus-Bethe-Salpeter calculation of excitonic states and a density functional perturbation theory calculation of phonons and electron-phonon coupling. We demonstrate that, in order to obtain a consistent treatment of exciton-phonon coupling, diagrams have to be taken into account that can be neglected when the effect of lattice vibrations is treated in a static or quasistatic approximation. From the application of this approach to a model system, we analyzed the main features of the exciton-phonon interaction and provided a general picture of their link with the properties of materials such as exciton mass and exciton Bohr radius. [less ▲]

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See detailGenome sequencing analysis identifies new loci associated with Lewy body dementia and provides insights into the complex genetic architecture
Chia, Ruth; Sabir, Marya S.; Bandres-Ciga, Sara et al

E-print/Working paper (2020)

The genetic basis of Lewy body dementia (LBD) is not well understood. Here, we performed whole-genome sequencing in large cohorts of LBD cases and neurologically healthy controls to study the genetic ... [more ▼]

The genetic basis of Lewy body dementia (LBD) is not well understood. Here, we performed whole-genome sequencing in large cohorts of LBD cases and neurologically healthy controls to study the genetic architecture of this understudied form of dementia and to generate a resource for the scientific community. Genome-wide association analysis identified five independent risk loci, whereas genome-wide gene-aggregation tests implicated mutations in the gene GBA. Genetic risk scores demonstrate that LBD shares risk profiles and pathways with Alzheimer’s and Parkinson’s disease, providing a deeper molecular understanding of the complex genetic architecture of this age-related neurodegenerative condition.Competing Interest StatementThomas G. Beach is a consultant for Prothena, Vivid Genomics and Avid Radiopharmaceuticals. He is a scientific advisory board member for Vivid Genomics. John A. Hardy, Huw R. Morris, Stuart Pickering-Brown, Andrew B. Singleton, and Bryan J. Traynor hold US, EU and Canadian patents on the clinical testing and therapeutic intervention for the hexanucleotide repeat expansion of C9orf72. Michael A. Nalls is supported by a consulting contract between Data Tecnica International and the National Institute on Aging, NIH, Bethesda, MD, USA; as a possible conflict of interest Dr. Nalls also consults for Neuron23 Inc., Lysosomal Therapeutics Inc., Illumina Inc., the Michael J. Fox Foundation and Vivid Genomics among others. Jose A. Palma is an editorial board member of Movement Disorders, Parkinsonism & Related Disorders, BMC Neurology, and Clinical Autonomic Research. Bradley F. Boeve, James Leverenz, and Sonja W. Scholz serve on the Scientific Advisory Council of the Lewy Body Dementia Association. Sonja W. Scholz is an editorial board member for the Journal of Parkinson's Disease. Bryan J. Traynor is an editorial board member for JAMA Neurology; Journal of Neurology, Neurosurgery, and Psychiatry; Brain; and Neurobiology of Aging. Zbigniew K. Wszolek serves as a principal investigator or co-principal investigator on Abbvie, Inc. (M15-562 and M15-563), Biogen, Inc. (228PD201) grant, and Biohaven Pharmaceuticals, Inc. (BHV4157-206 and BHV3241-301). Zbigniew K. Wszolek serves as the principal investigator of the Mayo Clinic American Parkinson Disease Association (APDA) Information and Referral Center, and as co-principal investigator of the Mayo Clinic APDA Center for Advanced Research. All other authors report no competing interests. [less ▲]

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See detailPredicting near-optimal skin distance in Verlet buffer approach for Discrete Element Method
Mainassara Chekaraou, Abdoul Wahid UL; Besseron, Xavier UL; Rousset, Alban UL et al

in 10th IEEE Workshop on Parallel / Distributed Combinatorics and Optimization (2020, June)

The Verlet list method is a well-known bookkeeping technique of the interaction list used both in Molecular Dynamic (MD) and Discrete Element Method (DEM). The Verlet buffer technique is an enhancement of ... [more ▼]

The Verlet list method is a well-known bookkeeping technique of the interaction list used both in Molecular Dynamic (MD) and Discrete Element Method (DEM). The Verlet buffer technique is an enhancement of the Verlet list that consists of extending the interaction radius of each particle by an extra margin to take into account more particles in the interaction list. The extra margin is based on the local flow regime of each particle to account for the different flow regimes that can coexist in the domain. However, the choice of the near-optimal extra margin (which ensures the best performance) for each particle and the related parameters remains unexplored in DEM unlike in MD. In this study, we demonstrate that the near-optimal extra margin can fairly be characterized by four parameters that describe each particle local flow regime: the particle velocity, the ratio of the containing cell size to particle size, the containing cell solid fraction, and the total number of particles in the system. For this purpose, we model the near-optimal extra margin as a function of these parameters using a quadratic polynomial function. We use the DAKOTA SOFTWARE to carry out the Design and Analysis of Computer Experiments (DACE) and the sampling of the parameters for the simulations. For a given instance of the set of parameters, a global optimization method is considered to find the near-optimal extra margin. The latter is required for the construction of the quadratic polynomial model. The numerous simulations generated by the sampling of the parameter were performed on a High-Performance Computing (HPC) environment granting parallel and concurrent executions. This work provides a better understanding of the Verlet buffer method in DEM simulations by analyzing its performances and behavior in various configurations. The near-optimal extra margin can reasonably be predicted by two out of the four chosen parameters using the quadratic polynomial model. This model has been integrated into XDEM in order to automatically choose the extra margin without any input from the user. Evaluations on real industrial-level test cases show up to a 26% reduction of the execution time. [less ▲]

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See detailThe Temporary Reintroduction of Border Controls Inside theSchengen Area: Towards a Spatial Perspective
Evrard, Estelle UL; Nienaber, Birte UL; Sommarribas, Adolfo UL

in Journal of Borderlands Studies (2020), 35(3), 369-383

Following the terrorist attacks in Paris (November 2015) and Brussels(March 2016), several EU Member States have decided to re-establish border controls or to build walls inside the Schengen Area ... [more ▼]

Following the terrorist attacks in Paris (November 2015) and Brussels(March 2016), several EU Member States have decided to re-establish border controls or to build walls inside the Schengen Area. Although these decisions are temporary and legally framed by the Schengen code, their extent disrupts the free movement within the Schengen Area, in particular in border areas. While lawyers and economists have analyzed the impacts of this situation, the spatial perspective has remained rather neglected.This exploratory contribution aims to address this gap in the literature by outlining the spatial significance of reintroduced controls for border areas inside the Schengen Area. This contribution firstly undertakes a literature review of the different conceptual tools at hand. These are then compared with a set of exploratory empirical materials. The article focuses more precisely on the Greater Region where France and Germany have reintroduced border controls, thus disrupting in particular daily cross-border flows with Luxembourg and Belgium. The analysis demonstrates that the border acts as a filter, disrupting cross-border flows and cooperation. Also, it sheds some light on the important role played by the ideational perception of the border for practitioners and decision-makers. This contribution concludes by suggesting several paths for a future research agenda. [less ▲]

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See detailIoV-based Deployment and Scheduling of Charging Infrastructure in Intelligent Transportation Systems
Ejaz, Waleed; Naeem, Mohammed; Sharma, Shree Krishna UL et al

in IEEE Sensors Journal (2020)

Internet of vehicles (IoV) is an emerging paradigm to exchange and analyze information collected from sensors using wireless technologies between vehicles and people, vehicles and infrastructure, and ... [more ▼]

Internet of vehicles (IoV) is an emerging paradigm to exchange and analyze information collected from sensors using wireless technologies between vehicles and people, vehicles and infrastructure, and vehicles-to-vehicles. With the recent increase in the number of electric vehicles (EVs), the seamless integration of IoV in EVs and charging infrastructure can offer environmentally sustainable and budget-friendly transportation. In this paper, we propose an IoV-based framework that consists of deployment and scheduling of a mobile charging infrastructure. For the deployment, we formulate an optimization problem to minimize the total cost of mobile charging infrastructure placement while considering constraints on the number of EVs that can be charged simultaneously. The formulated problem is mixedinteger programming and solved by using the branch and bound algorithm. We then propose an IoV-based scheduling scheme for EVs charging to minimize travel distance and charging costs while satisfying the constraints of charging time requirement of EVs and resources of a charging station.We consider passive road sensors and traffic sensors in the proposed IoV-based scheduling scheme to enable EV users for finding a charging station that can fulfill their requirements, as well as to enable service providers to know about the demand in the area. Simulation results illustrate the significant impact of the optimal deployment of charging infrastructure and scheduling optimization on the efficiency of EVs charging. [less ▲]

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See detailA Comprehensive Survey on Resource Allocation for CRAN in 5G and Beyond Networks
Ejaz, Waleed; Sharma, Shree Krishna UL; Saadat, Salman et al

in Journal of Network and Computer Applications (2020)

The diverse service requirements coming with the advent of sophisticated applications as well as a large number of connected devices demand for revolutionary changes in the traditional distributed radio ... [more ▼]

The diverse service requirements coming with the advent of sophisticated applications as well as a large number of connected devices demand for revolutionary changes in the traditional distributed radio access network (RAN). To this end, Cloud-RAN (CRAN) is considered as an important paradigm to enhance the performance of the upcoming fifth generation (5G) and beyond wireless networks in terms of capacity, latency, and connectivity to a large number of devices. Out of several potential enablers, efficient resource allocation can mitigate various challenges related to user assignment, power allocation, and spectrum management in a CRAN, and is the focus of this paper. Herein, we provide a comprehensive review of resource allocation schemes in a CRAN along with a detailed optimization taxonomy on various aspects of resource allocation. More importantly, we identity and discuss the key elements for efficient resource allocation and management in CRAN, namely: user assignment, remote radio heads (RRH) selection, throughput maximization, spectrum management, network utility, and power allocation. Furthermore, we present emerging use-cases including heterogeneous CRAN, millimeter-wave CRAN, virtualized CRAN, Non- Orthogonal Multiple Access (NoMA)-based CRAN and fullduplex enabled CRAN to illustrate how their performance can be enhanced by adopting CRAN technology. We then classify and discuss objectives and constraints involved in CRAN-based 5G and beyond networks. Moreover, a detailed taxonomy of optimization methods and solution approaches with different objectives is presented and discussed. Finally, we conclude the paper with several open research issues and future directions. [less ▲]

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See detailImplicit Attitudes and Beliefs about Diversity (Cancelled due to COVID-19)
Stogianni, Maria UL; Grohmann, Lara; Kremer, Marina et al

Poster (2020, June)

Short abstract: The study examined attitudes towards multiculturalism in two European countries (Germany and Luxembourg). The findings reveal a positive relationship between implicit and explicit ... [more ▼]

Short abstract: The study examined attitudes towards multiculturalism in two European countries (Germany and Luxembourg). The findings reveal a positive relationship between implicit and explicit attitudes. Between group differences in the endorsement of diversity ideologies can be attributed to personality and biographical factors. [less ▲]

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See detailIN PURSUIT OF OPENNESS An analysis of the legal framework of the European Union’s Copernicus’ open data policy
Cabrera Alvarado, Sandra UL

Doctoral thesis (2020)

The European Union (EU) civil Earth Observation (EO) programme Copernicus, has positioned itself as one of the largest EO data providers worldwide by providing an answer to strong demand for ... [more ▼]

The European Union (EU) civil Earth Observation (EO) programme Copernicus, has positioned itself as one of the largest EO data providers worldwide by providing an answer to strong demand for (environmental) data and information thanks to its open data policy mandated by its regulatory framework. Nevertheless, it has been the target of criticism by some policymakers who argue that rather benefiting Europeans, Copernicus' open data policy impacts negatively in the Union’s competitiveness and furthers the economic interests of US tech giants, such as Amazon and Google. Facing this criticism, the European Commission has evaluated possible modifications on the open data policy pillars “full, free and open” to address emerging economic and technological challenges. This dissertation contributes to this debate by answering the overarching question of whether alterations to the open data policy could be done without hampering Copernicus’ core goals, and whether such alternation would be in compliance with the EU legal framework. Specifically, this dissertation addresses the balancing of the right of access to public information against the economic public interest protection. To do so, firstly, this dissertation explains the legal meaning of the Copernicus’ open data policy pillars: 1) full, 2) free and 3) open within the context of EU law. Secondly, it explains the substantive limits of the open data policy, by examining non-contractual third party liability for the Commission, as well as the lawful exceptions to access to Copernicus data and information. These lawful exceptions are formulated by the Copernicus Regulation 377/2014 and Delegated Regulation 1159/2013 as the “protection of public security” and “international relations interests,” the “protection of privacy” and the “integrity of the Copernicus system”. However, this dissertation goes further by examining other EU law texts on the right of access to public information, such as the Regulation 1049/2001 and its Article 4 on the protection of public economic and financial interests, and the public overriding interests on access to environmental information enshrined mainly in the Regulation 1367/2006 and the Directive 2003/4/EC. Finally, it presents a proposal on how to evaluate the performance of Copernicus’ open data policy in order to determine if any substantial modification of this policy is indeed desirable. [less ▲]

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See detailInteractive MS/MS Visualization with the Metabolomics Spectrum Resolver Web Service
Wang, Mingxun; Rogers, Simon; Bittremieux, Wout et al

E-print/Working paper (2020)

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See detailMining the NIST Mass Spectral Library Reveals the Extent of Sodium Assisted Inductive Cleavage in Collision-Induced Fragmentation
Ludwig, Marcus; Broeckling, Corey D.; Dorrestein, Pieter et al

E-print/Working paper (2020)

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See detailCorrelation satellites in optical and loss spectra
Cudazzo, Pier Luigi UL; Reining, Lucia

in Physical Review Research (2020), 2

Coupling of excitations leads to intriguing effects on the spectra of materials. We propose a cumulant formulation for neutral electronic excitations which opens the way to describe effects such as double ... [more ▼]

Coupling of excitations leads to intriguing effects on the spectra of materials. We propose a cumulant formulation for neutral electronic excitations which opens the way to describe effects such as double plasmon satellites or exciton-exciton coupling. Our approach starts from the GW+Bethe-Salpeter approximation to many-body perturbation theory which is based on a quasiparticle picture, and it adds coupling of excitations through a consistent inclusion of dynamically screened interactions. This requires one to consider scattering contributions that are usually neglected. The result is formulated in a way that highlights essential physics, that can be implemented as a postprocessing tool in first-principles codes, and that suggests which kind of materials and measurements should exhibit strong effects. This is illustrated using a model. [less ▲]

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See detailFluctuations for matrix-valued Gaussian processes
Jaramillo Gil, Arturo UL; Pardo Millan, Juan Carlos; Diaz Torres, Mario Alberto

E-print/Working paper (2020)

We consider a symmetric matrix-valued Gaussian process $Y^{(n)}=(Y^{(n)}(t);t\ge0)$ and its empirical spectral measure process $\mu^{(n)}=(\mu_{t}^{(n)};t\ge0)$. Under some mild conditions on the ... [more ▼]

We consider a symmetric matrix-valued Gaussian process $Y^{(n)}=(Y^{(n)}(t);t\ge0)$ and its empirical spectral measure process $\mu^{(n)}=(\mu_{t}^{(n)};t\ge0)$. Under some mild conditions on the covariance function of $Y^{(n)}$, we find an explicit expression for the limit distribution of $$Z_F^{(n)} := \left( \big(Z_{f_1}^{(n)}(t),\ldots,Z_{f_r}^{(n)}(t)\big) ; t\ge0\right),$$ where $F=(f_1,\dots, f_r)$, for $r\ge 1$, with each component belonging to a large class of test functions, and $$ Z_{f}^{(n)}(t) := n\int_{\R}f(x)\mu_{t}^{(n)}(\ud x)-n\E\left[\int_{\R}f(x)\mu_{t}^{(n)}(\ud x)\right].$$ More precisely, we establish the stable convergence of $Z_F^{(n)}$ and determine its limiting distribution. An upper bound for the total variation distance of the law of $Z_{f}^{(n)}(t)$ to its limiting distribution, for a test function $f$ and $t\geq0$ fixed, is also given. [less ▲]

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See detailChanges in City-Level Foreclosure Rates and Home Prices through the Great Recession and Depressive Symptoms among Older Americans
Settels, Jason UL

in Society and Mental Health (2020)

The changing economic fortunes of cities influence mental health. However, the mechanisms through which this occurs are underexplored. I address this gap by investigating the Great Recession of 2007-2009 ... [more ▼]

The changing economic fortunes of cities influence mental health. However, the mechanisms through which this occurs are underexplored. I address this gap by investigating the Great Recession of 2007-2009. Using the National Social Life, Health, and Aging Project survey (N = 1,341), I study whether rises in cities’ home foreclosure rates and declines in median home prices through the Great Recession increase older persons’ depressive symptoms. I also study possible mediation through household assets declines. I find that increases in cities’ home foreclosure rates and declines in median home prices increase depressive symptoms beyond the effects of personal financial losses. Results show no evidence of mediation through asset loses, suggesting effects through other channels. Supplementary analyses reveal less direct links between changes in city-level unemployment rates and median household incomes and changes in depressive symptoms. [less ▲]

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See detailA Dynamics-based Approach for the Target Control of Boolean Networks
Su, Cui; Pang, Jun UL

in Proceedings of the 11th ACM International Conference on Bioinformatics, Computational Biology and Health Informatics (2020)

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See detailTaking Stock of the Bologna Process at 20: The Possibilities and Limits of Soft Law Governance
Deca, Ligia; Harmsen, Robert UL

in Curaj, Adrian; Deca, Ligia; Pricopie, Remus (Eds.) European Higher Education Area: Challenges for a New Decade (2020)

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See detailLuxemburger Standarddeutsch - Kodifizierung, Sprachbewusstsein und Unterrichtspraxis
Sieburg, Heinz UL

in Colin, Nicole; Parr, Rolf; Teissier, Catherine (Eds.) et al Germanistik - eine interkulturelle Wissenschaft? (2020)

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See detailHemmer, René
Zeiss-Zippel, Tina UL

in Luxemburger Musiklexikon (2020)

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