References of "E-prints/Working papers"      in Complete repository Arts & humanities   Archaeology   Art & art history   Classical & oriental studies   History   Languages & linguistics   Literature   Performing arts   Philosophy & ethics   Religion & theology   Multidisciplinary, general & others Business & economic sciences   Accounting & auditing   Production, distribution & supply chain management   Finance   General management & organizational theory   Human resources management   Management information systems   Marketing   Strategy & innovation   Quantitative methods in economics & management   General economics & history of economic thought   International economics   Macroeconomics & monetary economics   Microeconomics   Economic systems & public economics   Social economics   Special economic topics (health, labor, transportation…)   Multidisciplinary, general & others Engineering, computing & technology   Aerospace & aeronautics engineering   Architecture   Chemical engineering   Civil engineering   Computer science   Electrical & electronics engineering   Energy   Geological, petroleum & mining engineering   Materials science & engineering   Mechanical engineering   Multidisciplinary, general & others Human health sciences   Alternative medicine   Anesthesia & intensive care   Cardiovascular & respiratory systems   Dentistry & oral medicine   Dermatology   Endocrinology, metabolism & nutrition   Forensic medicine   Gastroenterology & hepatology   General & internal medicine   Geriatrics   Hematology   Immunology & infectious disease   Laboratory medicine & medical technology   Neurology   Oncology   Ophthalmology   Orthopedics, rehabilitation & sports medicine   Otolaryngology   Pediatrics   Pharmacy, pharmacology & toxicology   Psychiatry   Public health, health care sciences & services   Radiology, nuclear medicine & imaging   Reproductive medicine (gynecology, andrology, obstetrics)   Rheumatology   Surgery   Urology & nephrology   Multidisciplinary, general & others Law, criminology & political science   Civil law   Criminal law & procedure   Criminology   Economic & commercial law   European & international law   Judicial law   Metalaw, Roman law, history of law & comparative law   Political science, public administration & international relations   Public law   Social law   Tax law   Multidisciplinary, general & others Life sciences   Agriculture & agronomy   Anatomy (cytology, histology, embryology...) & physiology   Animal production & animal husbandry   Aquatic sciences & oceanology   Biochemistry, biophysics & molecular biology   Biotechnology   Entomology & pest control   Environmental sciences & ecology   Food science   Genetics & genetic processes   Microbiology   Phytobiology (plant sciences, forestry, mycology...)   Veterinary medicine & animal health   Zoology   Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences   Chemistry   Earth sciences & physical geography   Mathematics   Physics   Space science, astronomy & astrophysics   Multidisciplinary, general & others Social & behavioral sciences, psychology   Animal psychology, ethology & psychobiology   Anthropology   Communication & mass media   Education & instruction   Human geography & demography   Library & information sciences   Neurosciences & behavior   Regional & inter-regional studies   Social work & social policy   Sociology & social sciences   Social, industrial & organizational psychology   Theoretical & cognitive psychology   Treatment & clinical psychology   Multidisciplinary, general & others     Showing results 1 to 100 of 1332 1 2 3 4 5 6     The edge-based strain smoothing method for compressible and nearly incompressible non-linear elasticity for solid mechanicsLee, Chang-Kye; Mihai, L. Angela; Kerfriden, Pierre et alE-print/Working paper (in press)Detailed reference viewed: 509 (38 UL) The mod 2 cohomology rings of congruence subgroups in the Bianchi groupsBerkove, Ethan; Lakeland, Grant; Rahm, Alexander E-print/Working paper (in press)We provide new tools for the calculation of the torsion in the cohomology of congruence subgroups in the Bianchi groups : An algorithm for finding particularly useful fundamental domains, and an analysis ... [more ▼]We provide new tools for the calculation of the torsion in the cohomology of congruence subgroups in the Bianchi groups : An algorithm for finding particularly useful fundamental domains, and an analysis of the equivariant spectral sequence combined with torsion subcomplex reduction. [less ▲]Detailed reference viewed: 244 (17 UL) Yolanda von Vianden und das Yolanda-EposSieburg, Heinz E-print/Working paper (in press)Detailed reference viewed: 133 (10 UL) No more Piecemeal TacticsKafteranis, Dimitrios ; Robert, BrochhausE-print/Working paper (2021)Detailed reference viewed: 14 (0 UL) Loss of function variants in the KCNQ5 gene are associated with genetic generalized epilepsiesKrueger, Johanna; Schubert, Julian; Kegele, Josua et alE-print/Working paper (2021)Objective: De novo missense variants in KCNQ5, encoding the voltage gated K+ channel KV7.5, have been described as a cause of developmental and epileptic encephalopathy (DEE) or intellectual disability ... [more ▼]Objective: De novo missense variants in KCNQ5, encoding the voltage gated K+ channel KV7.5, have been described as a cause of developmental and epileptic encephalopathy (DEE) or intellectual disability (ID). We set out to identify disease-related KCNQ5 variants in genetic generalized epilepsy (GGE) and their underlying mechanisms. Methods: 1292 families with GGE were studied by next-generation sequencing. Whole-cell patch-clamp recordings, biotinylation and phospholipid overlay assays were performed in mammalian cells combined with docking and homology modeling. Results: We identified three deleterious heterozygous missense variants, one truncation and one splice site alteration in five independent families with GGE with predominant absence seizures, two variants were also associated with mild to moderate ID. All three missense variants displayed a strongly decreased current density indicating a loss-of-function (LOF). When mutant channels were co-expressed with wild-type (WT) KV7.5 or KV7.5 and KV7.3 channels, three variants also revealed a significant dominant-negative effect on WT channels. Other gating parameters were unchanged. Biotinylation assays indicated a normal surface expression of the variants. The p.Arg359Cys variant altered PI(4,5)P2-interaction, presumably in the non-conducting preopen-closed state. Interpretation: Our study indicates that specific deleterious KCNQ5 variants are associated with GGE, partially combined with mild to moderate ID. The disease mechanism is a LOF partially with dominant-negative effects through functional, rather than trafficking deficits. LOF of KV7.5 channels will reduce the M-current, likely resulting in increased excitability of KV7.5-expressing neurons. Further studies on a network level are necessary to understand which circuits are affected and how the variants induce generalized seizures. [less ▲]Detailed reference viewed: 17 (0 UL) The United States of America, Racism and Sanctions Meet at the International Criminal CourtOwiso, Owiso E-print/Working paper (2021)Detailed reference viewed: 41 (0 UL) Ultra-rare constrained missense variants in the epilepsies: Shared and specific enrichment patterns in neuronal gene-sets 2021.04.18.440264Koko, Mahmoud; Krause, Roland ; Sander, Thomas et alE-print/Working paper (2021)Background: Burden analysis in epilepsy has shown an excess of deleterious ultra-rare variants (URVs) in few gene-sets, such as known epilepsy genes, constrained genes, ion channel or GABAA receptor genes ... [more ▼]Background: Burden analysis in epilepsy has shown an excess of deleterious ultra-rare variants (URVs) in few gene-sets, such as known epilepsy genes, constrained genes, ion channel or GABAA receptor genes. We set out to investigate the burden of URVs in a comprehensive range of gene-sets presumed to be implicated in epileptogenesis. Methods: We investigated several constraint and conservation-based strategies to study whole exome sequencing data from European individuals with developmental and epileptic encephalopathies (DEE, n = 1,003), genetic generalized epilepsy (GGE, n = 3,064), and non-acquired focal epilepsy (NAFE, n = 3,522), collected by the Epi25 Collaborative, compared to 3,962 ancestry-matched controls. The burden of 12 URVs types in 92 gene-sets was compared between epilepsy cases (DDE, GGE, NAFE) and controls using logistic regression analysis. Results: Burden analysis of brain-expressed genes revealed an excess of different URVs types in all three epilepsy categories which was largest for constrained missense variants. The URVs burden was prominent in neuron-specific, synaptic and developmental genes as well as genes encoding ion channels and receptors, and it was generally higher for DEE and GGE compared to NAFE. The patterns of URVs burden in gene-sets expressed in inhibitory vs. excitatory neurons or receptors suggested a high burden in both in DEE but a differential involvement of inhibitory genes in GGE, while excitatory genes were predominantly affected in NAFE. Top ranking susceptibility genes from a recent genome-wide association study (GWAS) of generalized and focal epilepsies displayed a higher URVs burden in constrained coding regions in GGE and NAFE, respectively. Conclusions: Using exome-based gene-set burden analysis, we demonstrate that missense URVs affecting mainly constrained sites are enriched in neuronal genes in both common and rare severe epilepsy syndromes. Our results indicate a differential impact of these URVs in genes expressed in inhibitory vs. excitatory neurons and receptors in generalized vs. focal epilepsies. The excess of URVs in top-ranking GWAS risk-genes suggests a convergence of rare deleterious and common risk-variants in the pathogenesis of generalized and focal epilepsies. [less ▲]Detailed reference viewed: 19 (0 UL) Symposium on the ‘Legacy’ of the USA Sanctions against International Criminal Court Prosecutor Ms Fatou Bensouda and Mr Phakiso MochochokoOwiso, Owiso ; Sharon, NakandhaE-print/Working paper (2021)Detailed reference viewed: 39 (0 UL) Les langues dans les offres d'emploi au Luxembourg (1984-2019)Pigeron-Piroth, Isabelle ; Fehlen, Fernand E-print/Working paper (2021)À partir d’un échantillon d’offres d’emploi publiées dans le Luxemburger Wort, portant sur la période 1984-2019, cette étude décrit l’évolution des compétences linguistiques exigées ou souhaitées sur le ... [more ▼]À partir d’un échantillon d’offres d’emploi publiées dans le Luxemburger Wort, portant sur la période 1984-2019, cette étude décrit l’évolution des compétences linguistiques exigées ou souhaitées sur le marché du travail du Luxembourg. Après une présentation contextuelle de la situation linguistique et de l’emploi au Luxembourg, l’analyse empirique des quelques 8 340 offres d’emploi de notre échantillon constitue le cœur de cette publication. Aux divers tableaux et graphiques illustrant notre propos s’ajoutent des décryptages de la sémantique utilisée dans les offres d’emploi publiées, utiles à la compréhension des besoins linguistiques dans un marché du travail plurilingue et international. [less ▲]Detailed reference viewed: 293 (35 UL) Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implicationsJohannesen, Katrine M.; Liu, Yuanyuan; Gjerulfsen, Cathrine E. et alE-print/Working paper (2021)We report detailed functional analyses and genotype-phenotype correlations in 433 individuals carrying disease-causing variants in SCN8A, encoding the voltage-gated Na+ channel NaV1.6. Five different ... [more ▼]We report detailed functional analyses and genotype-phenotype correlations in 433 individuals carrying disease-causing variants in SCN8A, encoding the voltage-gated Na+ channel NaV1.6. Five different clinical subgroups could be identified: 1) Benign familial infantile epilepsy (BFIE) (n=17, normal cognition, treatable seizures), 2) intermediate epilepsy (n=36, mild ID, partially pharmacoresponsive), 3) developmental and epileptic encephalopathy (DEE, n=191, severe ID, majority pharmacoresistant), 4) generalized epilepsy (n=21, mild to moderate ID, frequently with absence seizures), and 5) affected individuals without epilepsy (n=25, mild to moderate ID). Groups 1-3 presented with early-onset (median: four months) focal or multifocal seizures and epileptic discharges, whereas the onset of seizures in group 4 was later (median: 39 months) with generalized epileptic discharges. The epilepsy was not classifiable in 143 individuals. We performed functional studies expressing missense variants in ND7/23 neuroblastoma cells and primary neuronal cultures using recombinant tetrodotoxin insensitive human NaV1.6 channels and whole-cell patch clamping. Two variants causing DEE showed a strong gain-of-function (GOF, hyperpolarising shift of steady-state activation, strongly increased neuronal firing rate), and one variant causing BFIE or intermediate epilepsy showed a mild GOF (defective fast inactivation, less increased firing). In contrast, all three variants causing generalized epilepsy induced a loss-of-function (LOF, reduced current amplitudes, depolarising shift of steady-state activation, reduced neuronal firing). Including previous studies, functional effects were known for 165 individuals. All 133 individuals carrying GOF variants had either focal (76, groups 1-3), or unclassifiable epilepsy (37), whereas 32 with LOF variants had either generalized (14), no (11) or unclassifiable (5) epilepsy; only two had DEE. Computational modeling in the GOF group revealed a significant correlation between the severity of the electrophysiological and clinical phenotypes. GOF variant carriers responded significantly better to sodium channel blockers (SCBs) than to other anti-seizure medications, and the same applied for all individuals of groups 1-3.In conclusion, our data reveal clear genotype-phenotype correlations between age at seizure onset, type of epilepsy and gain- or loss-of-function effects of SCN8A variants. Generalized epilepsy with absence seizures is the main epilepsy phenotype of LOF variant carriers and the extent of the electrophysiological dysfunction of the GOF variants is a main determinant of the severity of the clinical phenotype in focal epilepsies. Our pharmacological data indicate that SCBs present a therapeutic treatment option in early onset SCN8A-related focal epilepsy. [less ▲]Detailed reference viewed: 23 (0 UL) Sustainable Finance Law: The EU Paradigm and the Way ForwardAlexandraki, Chrysa E-print/Working paper (2021)Detailed reference viewed: 38 (1 UL) Adaptively Secure Laconic Function Evaluation for NC1Agrawal, Shweta; Rosie, Razvan E-print/Working paper (2021)Detailed reference viewed: 118 (28 UL) Digitalisierung von Schule und Digitalisierung im UnterrichtHarion, Dominic ; Pause, Johannes E-print/Working paper (2021)Detailed reference viewed: 49 (5 UL) Democratic Legitimacy of the Single Resolution Board: Is Legality the Right Question?Mendes, Joana E-print/Working paper (2021)The choice to entrust EU banking resolution to an independent body opened the familiar democratic legitimacy conundrum that besets independent institutions in national and in EU law. This paper examines ... [more ▼]The choice to entrust EU banking resolution to an independent body opened the familiar democratic legitimacy conundrum that besets independent institutions in national and in EU law. This paper examines both the conventional view on the relationship between legality control and democratic legitimacy, that the German Federal Constitutional Court endorsed in its SSM/SRM judgment, and the limits of such conception. Conceived as a “compensatory measure”, legal protection through judicial review and internal administrative review enables the Court to bring independent institutions within the (national) constitutional framework that they strain. Law’s binding character becomes a matter of ensuring not only the rule of law but also democracy. Yet, even detailed legal mandates cannot preclude administrative bodies to define the way law is completed and concretised. While the Court does not adhere to a ‘transmission-belt model’ of administrations, not surprisingly – as a court deciding on democratic legitimacy – it falls short of recognising that legality can do very little to ground the democratic legitimacy of fundamental political choices, such as those entrusted to the Single Resolution Board. [less ▲]Detailed reference viewed: 61 (1 UL) Public Covid-19 X-ray datasets and their impact on model bias - a systematic review of a significant problemGarcia Santa Cruz, Beatriz ; Bossa, Matias Nicolas ; Sölter, Jan et alE-print/Working paper (2021)Computer-aided-diagnosis for COVID-19 based on chest X-ray suffers from weak bias assessment and limited quality-control. Undetected bias induced by inappropriate use of datasets, and improper ... [more ▼]Computer-aided-diagnosis for COVID-19 based on chest X-ray suffers from weak bias assessment and limited quality-control. Undetected bias induced by inappropriate use of datasets, and improper consideration of confounders prevents the translation of prediction models into clinical practice. This study provides a systematic evaluation of publicly available COVID-19 chest X-ray datasets, determining their potential use and evaluating potential sources of bias. Only 5 out of 256 identified datasets met at least the criteria for proper assessment of risk of bias and could be analysed in detail. Remarkably almost all of the datasets utilised in 78 papers published in peer-reviewed journals, are not among these 5 datasets, thus leading to models with high risk of bias. This raises concerns about the suitability of such models for clinical use. This systematic review highlights the limited description of datasets employed for modelling and aids researchers to select the most suitable datasets for their task. [less ▲]Detailed reference viewed: 48 (2 UL) Assange’s Extradition: Status PendingKafteranis, Dimitrios ; Andreadakis, SteliosE-print/Working paper (2021)Detailed reference viewed: 13 (1 UL) Cloturing DeliberationAnesi, Vincent ; Safronov, MikhailE-print/Working paper (2021)We study how the institutional arrangements for ending deliberation --- the "cloture rules" --- interact with collective learning to affect the outcomes of decision making in committees. In contrast to ... [more ▼]We study how the institutional arrangements for ending deliberation --- the "cloture rules" --- interact with collective learning to affect the outcomes of decision making in committees. In contrast to much of the previous literature on deliberative commit tees, this paper makes a distinction between the final votes over policy proposals and the cloture votes that bring them about. Using this approach, we explore how cloture rules influence the course of deliberation, the likelihood of inefficient deliberative outcomes, the circumstances surrounding failures to bring proposals to a final vote, and the distribution of power among committee members in the deliberative process. We also use our simple model to examine the issue of the stability of cloture rules, characterizing the rules that no coalition of committee members is able or willing to overturn. We show in particular that all cloture rules are dynamically stable. [less ▲]Detailed reference viewed: 131 (11 UL) Looking for the Best and Brightest': Hiring difficulties and high-skilled foreign workersRaux, Morgan E-print/Working paper (2021)This paper studies the complementarity between domestic and foreign skilled workers. It develops a simple model where employers seek to recruit a foreign worker when finding domestic workers takes more ... [more ▼]This paper studies the complementarity between domestic and foreign skilled workers. It develops a simple model where employers seek to recruit a foreign worker when finding domestic workers takes more time. This paper confirms the predictions of the model. I rely on a within-firm within-occupation identification strategy to compare recruitment decisions made by a given employer for similar positions that differ in job posting duration. To identify this relationship, I have collected and assembled a new and original dataset at the job level. I match online job postings to administrative data on labor condition applications (LCAs) submitted as the first step in applying for H-1B temporary skilled worker visas. I find that employers are 28 percent more likely to submit an LCA when the job posting duration is one standard deviation longer. I provide evidence suggesting that this phenomenon is due to insufficient domestic labor supply in these occupations. [less ▲]Detailed reference viewed: 71 (10 UL) Panic? Probing Angst over Immigration and CrimeMahe, Clotilde ; Parra-Cely, SergioE-print/Working paper (2021)We examine empirically whether immigration affects crime in an emerging country, Ecuador. We exploit the fact that immigration flows of Venezuelans suddenly evolved from voluntary to forced, and occurred ... [more ▼]We examine empirically whether immigration affects crime in an emerging country, Ecuador. We exploit the fact that immigration flows of Venezuelans suddenly evolved from voluntary to forced, and occurred disproportionately along land borders. We use nationally representative administrative and survey data to precisely estimate an economically null effect of Venezuelan immigration on property and violent crime. We also show that natives are more likely to believe that immigration worsens the economy, despite clear evidence of negative labour market impact due to recent Venezuelan inflows. Results confirm that fears over immigration and crime are not necessarily supported by facts. [less ▲]Detailed reference viewed: 53 (6 UL) Which Factors Play a Role in Coco Issuance? Evidence from European Banks.Wolff, Christian E-print/Working paper (2021)This paper explores empirically the reasons why some banks issue Contingent Convertible Bonds while others do not. For this purpose we use a binary logistic model and control for the determinants ... [more ▼]This paper explores empirically the reasons why some banks issue Contingent Convertible Bonds while others do not. For this purpose we use a binary logistic model and control for the determinants suggested by the literature on optimal capital structure which considers four drivers of capital structure: corporate taxes, costs of financial distress, agency costs and asymmetric information.. Our findings suggest that the banks with bigger size and those with higher Tier 1 capital, higher net loans, higher wholesale funding, lower level of leverage and lower risk weighted assets have a higher tendency to issue CoCos. Our results also suggest that banks in countries with higher annual growth rate of GDP per capita and those listed as G-SIBs are more likely to issue CoCos. [less ▲]Detailed reference viewed: 43 (0 UL) Addressing Hate Speech with Data Science: An Overview from Computer Science PerspectiveLenzini, Gabriele ; Srba; Pikuliak, Matus et alE-print/Working paper (2021)From a computer science perspective, addressing on-line hate speech is a challenging task that is attracting the attention of both industry (mainly social media platform owners) and academia. In this ... [more ▼]From a computer science perspective, addressing on-line hate speech is a challenging task that is attracting the attention of both industry (mainly social media platform owners) and academia. In this chapter, we provide an overview of state-of-the-art data-science approaches - how they define hate speech, which tasks they solve to mitigate the phenomenon, and how they address these tasks. We limit our investigation mostly to (semi-)automatic detection of hate speech, which is the task that the majority of existing computer science works focus on. Finally, we summarize the challenges and the open problems in the current data-science research and the future directions in this field. Our aim is to prepare an easily understandable report, capable to promote the multidisciplinary character of hate speech research. Researchers from other domains (e.g., psychology and sociology) can thus take advantage of the knowledge achieved in the computer science domain but also contribute back and help improve how computer science is addressing that urgent an d socially relevant issue which is the prevalence of hate speech in social media. [less ▲]Detailed reference viewed: 39 (1 UL) Introducing the COVID-19 crisis Special Education Needs Coping SurveyDukes, Daniel; Van Herwegen, Jo; Alessandri, Michael et alE-print/Working paper (2021)Individuals with special education needs have been particularly affected by the COVID-19 pandemic as they have been shown to be at high risk of losing medical and institutional support at a time when ... [more ▼]Individuals with special education needs have been particularly affected by the COVID-19 pandemic as they have been shown to be at high risk of losing medical and institutional support at a time when people are being asked to stay isolated, suffering increased anxiety and depression as a consequence. Their families have often found themselves under tremendous pressure to provide support, engendering financial hardship, and physical and emotional strains. In such times, it is vital that international collaborations assess the impact on the individuals and their families, affording the opportunity to make national and international comparisons of how people have coped and what needs to be done to optimize the measures taken by families, associations and governments. This paper introduces one such collaboration. [less ▲]Detailed reference viewed: 31 (1 UL) Hierarchical a posteriori error estimation of Bank-Weiser type in the FEniCS ProjectBulle, Raphaël ; Hale, Jack ; Lozinski, Alexei et alE-print/Working paper (2021)In the seminal paper of Bank and Weiser [Math. Comp., 44 (1985), pp.283-301] a new a posteriori estimator was introduced. This estimator requires the solution of a local Neumann problem on every cell of ... [more ▼]In the seminal paper of Bank and Weiser [Math. Comp., 44 (1985), pp.283-301] a new a posteriori estimator was introduced. This estimator requires the solution of a local Neumann problem on every cell of the finite element mesh. Despite the promise of Bank-Weiser type estimators, namely locality, computational efficiency, and asymptotic sharpness, they have seen little use in practical computational problems. The focus of this contribution is to describe a novel implementation of hierarchical estimators of the Bank-Weiser type in a modern high-level finite element software with automatic code generation capabilities. We show how to use the estimator to drive (goal-oriented) adaptive mesh refinement and to mixed approximations of the nearly-incompressible elasticity problems. We provide comparisons with various other used estimators. An open-source implementation based on the FEniCS Project finite element software is provided as supplementary material. [less ▲]Detailed reference viewed: 49 (3 UL) Cultural differences and immigrants' wagesRaux, Morgan E-print/Working paper (2021)In this paper, I investigate how cultural differences affect the labor-market performance of immigrant workers in Germany. I document a negative relationship between hourly wages and the cultural distance ... [more ▼]In this paper, I investigate how cultural differences affect the labor-market performance of immigrant workers in Germany. I document a negative relationship between hourly wages and the cultural distance between immigrants' countries of origin and Germany. This result is robust across the three main indicators used in the gravity literature: linguistic, religious, and genetic distances. This cultural wage penalty disappears after five to ten years spent in Germany. Controlling for language proficiency as well as for selective in- and out-migration, these results highlight the cultural integration of immigrant workers. I finally provide evidence suggesting that lower wage progression may be explained by fewer job-to-job transitions. [less ▲]Detailed reference viewed: 111 (15 UL) A Robustness Check to Multiple Overlapping Deprivation Analysis (MODA) Methodology: The Case of NigeriaFagbeja, Teju; Cebotari, Victor E-print/Working paper (2021)Detailed reference viewed: 12 (0 UL) School-Related Violence in Latin America and the Caribbean: Building an Evidence Base for Stronger SchoolsChávez, Cirenia; Cebotari, Victor ; José Benítez, Maria et alE-print/Working paper (2021)Detailed reference viewed: 13 (0 UL) Digital twinning of Cellular Capsule Technology: emerging outcomes from the perspective of porous media mechanicsUrcun, Stéphane E-print/Working paper (2021)Spheroids encapsulated within alginate capsules are emerging as suitable in vitro tools to investigate the impact of mechanical forces on tumor growth since the internal tumor pressure can be retrieved ... [more ▼]Spheroids encapsulated within alginate capsules are emerging as suitable in vitro tools to investigate the impact of mechanical forces on tumor growth since the internal tumor pressure can be retrieved from the deformation of the capsule. Here we focus in particular on the Cellular Capsule Technology (CCT). We show in this contribution that a modeling approach accounting for the triphasic nature of the spheroid (extracellular matrix, tumor cells and interstitial fluid) offers a new perspective of analysis revealing that the pressure retrieved experimentally cannot be interpreted as a direct picture of the pressure sustained by the tumor cells and, as such, cannot therefore be used to quantify the critical pressure which induces stress-induced phenotype switch in tumour cells. The proposed multiphase reactive poro-mechanical model was cross-validated. Parameter sensitivity analyses on the digital twin revealed that the main parameters determining the encapsulated growth configuration are different from those driving growth in free condition, confirming that radically different phenomena are at play.Results reported in this contribution support the idea that multiphase reactive poro-mechanics is an exceptional theoretical framework to attain an in-depth understanding of CCT experiments, to confirm their hypotheses and to further improve their design. [less ▲]Detailed reference viewed: 101 (5 UL) https://arxiv.org/abs/2101.07083El Emam, Christian ; Seppi, AndreaE-print/Working paper (2021)We prove that any minimal Lagrangian diffeomorphism between two closed spherical surfaces with cone singularities is an isometry, without any assumption on the multiangles of the two surfaces. As an ... [more ▼]We prove that any minimal Lagrangian diffeomorphism between two closed spherical surfaces with cone singularities is an isometry, without any assumption on the multiangles of the two surfaces. As an application, we show that every branched immersion of a closed surface of constant positive Gaussian curvature in Euclidean three-space is a branched covering onto a round sphere, thus generalizing the classical rigidity theorem of Liebmann to branched immersions. [less ▲]Detailed reference viewed: 22 (1 UL) The Value of Coordination in Multimarket Bidding of Grid Energy StorageLöhndorf, Nils E-print/Working paper (2021)Detailed reference viewed: 62 (16 UL) On the Weyl problem for complete surfaces in the hyperbolic and anti-de Sitter spacesSchlenker, Jean-Marc E-print/Working paper (2021)The classical Weyl problem (solved by Lewy, Alexandrov, Pogorelov, and others) asks whether any metric of curvature K≥0 on the sphere is induced on the boundary of a unique convex body in $\R^3$. The ... [more ▼]The classical Weyl problem (solved by Lewy, Alexandrov, Pogorelov, and others) asks whether any metric of curvature K≥0 on the sphere is induced on the boundary of a unique convex body in $\R^3$. The answer was extended to surfaces in hyperbolic space by Alexandrov in the 1950s, and a dual'' statement, describing convex bodies in terms of the third fundamental form of their boundary (e.g. their dihedral angles, for an ideal polyhedron) was later proved. We describe three conjectural generalizations of the Weyl problem in $\HH^3$ and its dual to unbounded convex subsets and convex surfaces, in ways that are relevant to contemporary geometry since a number of recent results and well-known open problems can be considered as special cases. One focus is on convex domain having a thin'' asymptotic boundary, for instance a quasicircle -- this part of the problem is strongly related to the theory of Kleinian groups. A second direction is towards convex subsets with a thick'' ideal boundary, for instance a disjoint union of disks -- here one find connections to problems in complex analysis, such as the Koebe circle domain conjecture. A third direction is towards complete, convex disks of infinite area in $\HH^3$ and surfaces in hyperbolic ends -- with connections to questions on circle packings or grafting on the hyperbolic disk. Similar statements are proposed in anti-de Sitter geometry, a Lorentzian cousin of hyperbolic geometry where interesting new phenomena can occur, and in Minkowski and Half-pipe geometry. We also collect some partial new results mostly based on recent works. [less ▲]Detailed reference viewed: 34 (0 UL) Optimal convergence rates for the invariant density estimation of jump-diffusion processesAmorino, Chiara ; Nualart, EulaliaE-print/Working paper (2021)We aim at estimating the invariant density associated to a stochastic differential equation with jumps in low dimension, which is for d = 1 and d = 2. We consider a class of jump diffusion processes whose ... [more ▼]We aim at estimating the invariant density associated to a stochastic differential equation with jumps in low dimension, which is for d = 1 and d = 2. We consider a class of jump diffusion processes whose invariant density belongs to some Hölder space. Firstly, in dimension one, we show that the kernel density estimator achieves the convergence rate 1/T, which is the optimal rate in the absence of jumps. This improves the convergence rate obtained in [Amorino, Gloter (2021)], which depends on the Blumenthal-Getoor index for d = 1 and is equal to log T/T for d = 2. Secondly, we show that is not possible to find an estimator with faster rates of estimation. Indeed, we get some lower bounds with the same rates { 1/T , log T/T } in the mono and bi-dimensional cases, respectively. Finally, we obtain the asymptotic normality of the estimator in the one-dimensional case. [less ▲]Detailed reference viewed: 25 (5 UL) Digital hermeneutics and the European Historic Towns Atlas project: The digital and interactive historical town atlas of Luxembourg City as a “trading zone”Uhrmacher, Martin E-print/Working paper (2021)Detailed reference viewed: 26 (7 UL) A Survey of Requirements for COVID-19 Mitigation Strategies. Part II: Elicitation of RequirementsJamroga, Wojciech E-print/Working paper (2021)The COVID-19 pandemic has influenced virtually all aspects of our lives. Across the world, countries have applied various mitigation strategies, based on social, political, and technological instruments ... [more ▼]The COVID-19 pandemic has influenced virtually all aspects of our lives. Across the world, countries have applied various mitigation strategies, based on social, political, and technological instruments. We postulate that multi-agent systems can provide a common platform to study (and balance) their essential properties. We also show how to obtain a comprehensive list of the properties by distilling'' them from media snippets. Finally, we present a preliminary take on their formal specification, using ideas from multi-agent logics. [less ▲]Detailed reference viewed: 45 (4 UL) A Mixture of Generative Models Strategy Helps Humans Generalize across TasksHerce Castañón, Santiago; Cardoso-Leite, Pedro ; Altarelli, Irene et alE-print/Working paper (2021)What role do generative models play in generalization of learning in humans? Our novel multi-task prediction paradigm—where participants complete four sequence learning tasks, each being a different ... [more ▼]What role do generative models play in generalization of learning in humans? Our novel multi-task prediction paradigm—where participants complete four sequence learning tasks, each being a different instance of a common generative family—allows the separate study of within-task learning (i.e., finding the solution to each of the tasks), and across-task learning (i.e., learning a task differently because of past experiences). The very first responses participants make in each task are not yet affected by within-task learning and thus reflect their priors. Our results show that these priors change across successive tasks, increasingly resembling the underlying generative family. We conceptualize multi-task learning as arising from a mixture-of-generative-models learning strategy, whereby participants simultaneously entertain multiple candidate models which compete against each other to explain the experienced sequences. This framework predicts specific error patterns, as well as a gating mechanism for learning, both of which are observed in the data. [less ▲]Detailed reference viewed: 24 (5 UL) Nonparametric needlet estimation for partial derivatives of a probability density function on the d-torusDurastanti, Claudio; Turchi, Nicola E-print/Working paper (2021)Detailed reference viewed: 25 (0 UL) Optical properties of topological flat and dispersive bandsHabibi, Alireza ; Musthofa, Ahmad Z.; Adibi, Elaheh et alE-print/Working paper (2021)We study the optical properties of topological flat and dispersive bands. Due to their topological nature, there exists an anomalous Hall response which gives rise to a transverse current without applied ... [more ▼]We study the optical properties of topological flat and dispersive bands. Due to their topological nature, there exists an anomalous Hall response which gives rise to a transverse current without applied magnetic field. The dynamical Hall conductivity of systems with flat bands exhibits a sign change when the excitation energy is on resonance with the band gap, similar to the magnetotransport Hall conductivity profile. The sign change of the Hall conductivity is located at the frequency corresponding to the singularity of the joint density of states, i.e., the van Hove singularity (VHS). For perfectly flat bands, this VHS energy matches the band gap. On the other hand, in the case of dispersive bands, the VHS energy is located above the band gap. As a result, the two features of the Hall conductivity, i.e., the resonant feature at the band gap and the sign change at the VHS energy, become separated. This anomalous Hall response rotates the polarization of an electric field and can be detected in the reflected and transmitted waves, as Kerr and Faraday rotations, respectively, thus allowing a simple optical characterization of topological flat bands. [less ▲]Detailed reference viewed: 19 (4 UL) Gaussian fluctuation for Gaussian Wishart matrices of overall correlationNourdin, Ivan ; Pu, FeiE-print/Working paper (2021)Detailed reference viewed: 28 (1 UL) Phase transitions and noise sensitivity on the Poisson space via stopping sets and decision treesLast, Guenter; Peccati, Giovanni ; Yogeshwaran, DhandapaniE-print/Working paper (2021)Detailed reference viewed: 25 (0 UL) Redefining resilience: Integrative review and development of an assessment toolMantin, Binyamin E-print/Working paper (2021)Detailed reference viewed: 63 (10 UL) A powerful global test for spliceQTL effectsde Menezes, Renee X.; Rauschenberger, Armin ; ’t Hoen, Peter A. C. et alE-print/Working paper (2021)Statistical methods to test for effects of SNPs on exon inclusion exist, but often rely on testing of associations between multiple exon-SNP pairs, with sometimes subsequent summarization of results at ... [more ▼]Statistical methods to test for effects of SNPs on exon inclusion exist, but often rely on testing of associations between multiple exon-SNP pairs, with sometimes subsequent summarization of results at the gene level. Such approaches require heavy multiple testing correction, and detect mostly events with large effect sizes. We propose here a test to find spliceQTL effects which takes all exons and all SNPs into account simultaneously. For any chosen gene, this score-based test looks for association between the set of exon expressions and the set of SNPs, via a random-effects model framework. It is efficient to compute, and can be used if the number of SNPs is larger than the number of samples. In addition, the test is powerful to detect effects that are relatively small for individual exon-SNP pairs, but are observed for many pairs. Furthermore, test results are more often replicated across datasets than pairwise testing results. This partly our test is more robust to exon-SNP pair-specific effects, but do not extend to multiple pairs within the same gene. We conclude that the test we propose here offers more power and better replicability in the search for spliceQTL effects. [less ▲]Detailed reference viewed: 23 (1 UL) Inverse deformation analysis: an experimental and numerical assessment using the FEniCS ProjectMazier, Arnaud ; Bilger, Alexandre; Forte, Antonio E. et alE-print/Working paper (2021)In this paper, we develop a framework for solving inverse deformation problems using the FEniCS Project finite element software. We validate our approach with experimental imaging data acquired from a ... [more ▼]In this paper, we develop a framework for solving inverse deformation problems using the FEniCS Project finite element software. We validate our approach with experimental imaging data acquired from a soft silicone beam under gravity. In contrast with inverse iterative algorithms that require multiple solutions of a standard elasticity problem, the proposed method can compute the undeformed configuration by solving only one modified elasticity problem. This modified problem has a complexity comparable to the standard one. The framework is implemented within an open-source pipeline enabling the direct and inverse deformation simulation directly from imaging data. We use the high-level Unified Form Language (UFL) of the FEniCS Project to express the finite element model in variational form and to automatically derive the consistent Jacobian. Consequently, the design of the pipeline is flexible: for example, it allows the modification of the constitutive models by changing a single line of code. We include a complete working example showing the inverse deformation of a beam deformed by gravity as supplementary material. [less ▲]Detailed reference viewed: 99 (15 UL) Traces and memories of an ongoing pandemic – Yes We CareMajerus, Benoît in HumaMed@Larca (2021)Detailed reference viewed: 31 (7 UL) All in one stroke? Intervention Spaces for Dark PatternsRossi, Arianna ; Bongard, Kerstin E-print/Working paper (2021)This position paper draws from the complexity of dark patterns to develop arguments for differentiated interventions. We propose a matrix of interventions with a \textit{measure axis} (from user-directed ... [more ▼]This position paper draws from the complexity of dark patterns to develop arguments for differentiated interventions. We propose a matrix of interventions with a \textit{measure axis} (from user-directed to environment-directed) and a \textit{scope axis} (from general to specific). We furthermore discuss a set of interventions situated in different fields of the intervention spaces. The discussions at the 2021 CHI workshop "What can CHI do about dark patterns?" should help hone the matrix structure and fill its fields with specific intervention proposals. [less ▲]Detailed reference viewed: 56 (5 UL) Border or bordering practice? Changing perspectives on borders and challenges of praxeological approachesConnor, Ulla E-print/Working paper (2021)In Border Studies, the ongoing discussions on methodological and theoretical questions have led to the development of transformed approaches and vocabulary for border research. This contribution ... [more ▼]In Border Studies, the ongoing discussions on methodological and theoretical questions have led to the development of transformed approaches and vocabulary for border research. This contribution highlights the shift from ‘border’ to ‘bordering practice’ and questions its sources in the scientific context, such as the cultural turn and the related practice turn. Despite the popular use of the term ‘practice’ in Border Studies, sociological practice theories are not at the center of the development of dynamic concepts for studying borders. The article emphasizes the compatibility of sociological practice theories with the practice and process orientation in Border Studies. It gives a short overview of praxeological thinking in sociology and identifies methodological challenges for Border Studies targeting the development of praxeological re-search perspectives for borders. [less ▲]Detailed reference viewed: 43 (5 UL) Parental Assortative Mating and the Intergenerational Transmission of Human CapitalBingley, Paul; Cappellari, Lorenzo; Tatsiramos, Konstantinos E-print/Working paper (2021)We study the contribution of parental similarity in schooling levels to the intergenerational transmission of educational attainment. We develop an empirical model for educational correlations within the ... [more ▼]We study the contribution of parental similarity in schooling levels to the intergenerational transmission of educational attainment. We develop an empirical model for educational correlations within the family in which parental sorting can translate into intergenerational transmission, or transmission can originate from each parent independently. Estimating the model using educational attainment from Danish population-based administrative data for over 400,000 families, we find that about 75 percent of the intergenerational correlation in education is driven by the joint contribution of the parents. We also document a sizeable secular decline of parental assortative mating in education, with a corresponding fall in joint intergenerational transmission from both parents; a fall compensated by an increase in parent-specific intergenerational transmission, leaving total intergenerational persistence unchanged. The mechanisms of intergenerational transmission have changed, with an increased importance of one-to-one parent-child relationships. [less ▲]Detailed reference viewed: 39 (0 UL) Kerr effect in tilted nodal loop semimetalsEkström, Carl Johan Ingvar ; Hasdeo, Eddwi Hesky ; Farias, Maria Belen et alE-print/Working paper (2021)We investigate the optical activity of tilted nodal loop semimetals. We calculate the full conductivity matrix for a band structure containing a nodal loop with possible tilt in the x−y plane, which ... [more ▼]We investigate the optical activity of tilted nodal loop semimetals. We calculate the full conductivity matrix for a band structure containing a nodal loop with possible tilt in the x−y plane, which allows us to study the Kerr rotation and ellipticity both for a thin film and a bulk material. We find signatures in the Kerr signal that give direct information about the tilt velocity and direction, the radius of the nodal loop and the internal chemical potential of the system. These findings should serve as guide to understanding optical measurements of nodal loop semimetals and as an additional tool to characterize them. [less ▲]Detailed reference viewed: 17 (1 UL) Stages of COVID-19 pandemic and paths to herd immunity by vaccination: dynamical model comparing Austria, Luxembourg and SwedenKemp, Francoise ; Proverbio, Daniele ; Aalto, Atte et alE-print/Working paper (2021)Background. Worldwide more than 72 million people have been infected and 1.6 million died with SARS-CoV-2 by 15th December 2020. Non-pharmaceutical interventions which decrease social interaction have ... [more ▼]Background. Worldwide more than 72 million people have been infected and 1.6 million died with SARS-CoV-2 by 15th December 2020. Non-pharmaceutical interventions which decrease social interaction have been implemented to reduce the spread of SARS-CoV-2 and to mitigate stress on healthcare systems and prevent deaths. The pandemic has been tackled with disparate strategies by distinct countries resulting in different epidemic dynamics. However, with vaccines now becoming available, the current urgent open question is how the interplay between vaccination strategies and social interaction will shape the pandemic in the next months. Methods. To address this question, we developed an extended Susceptible-Exposed-Infectious-Removed (SEIR) model including social interaction, undetected cases and the progression of patients trough hospitals, intensive care units (ICUs) and death. We calibrated our model to data of Luxembourg, Austria and Sweden, until 15th December 2020. We incorporated the effect of vaccination to investigate under which conditions herd immunity would be achievable in 2021. Results. The model reveals that Sweden has the highest fraction of undetected cases, Luxembourg displays the highest fraction of infected population, and all three countries are far from herd immunity as of December 2020. The model quantifies the level of social interactions, and allows to assess the level which would keep Reff(t) below 1. In December 2020, this level is around 1/3 of what it was before the pandemic for all the three countries. The model allows to estimate the vaccination rate needed for herd immunity and shows that 2700 vaccinations/day are needed in Luxembourg to reach it by mid of April and 45,000 for Austria and Sweden. The model estimates that vaccinating the whole country’s population within 1 year could lead to herd immunity by July in Luxembourg and by August in Austria and Sweden. Conclusion. The model allows to shed light on the dynamics of the epidemics in different waves and countries. Our results emphasize that vaccination will help considerably but not immediately and therefore social measures will remain important for several months before they can be fully alleviated. [less ▲]Detailed reference viewed: 74 (1 UL) Post-Quantum Secure LFE for L/poly with Smaller ParametersNaccache, David; Rosie, Razvan ; Spignoli, Lorenzo E-print/Working paper (2021)Detailed reference viewed: 112 (5 UL) COVID Stress Test for the Rule of Law: States of Emergency under International Human Rights LawBaglayan, Basak E-print/Working paper (2021)Detailed reference viewed: 30 (0 UL) Environmental Culture and Economic ComplexityZanaj, Skerdilajda E-print/Working paper (2021)Detailed reference viewed: 81 (26 UL) On generalized Iwasawa main conjectures and p-adic Stark conjectures for Artin motivesMaksoud, Alexandre E-print/Working paper (2021)We continue the study of Selmer groups associated with an Artin representation endowed with a p-stabilization which was initiated in arXiv:1811.05368. We formulate a main conjecture and an extra zeros ... [more ▼]We continue the study of Selmer groups associated with an Artin representation endowed with a p-stabilization which was initiated in arXiv:1811.05368. We formulate a main conjecture and an extra zeros conjecture at all unramified odd primes p, which are shown to imply the p-part of the Tamagawa number conjecture for Artin motives at s=0. We also relate our new conjectures with various cyclotomic Iwasawa main conjectures and p-adic Stark conjectures that appear in the literature. In particular, they provide a natural interpretation for recent conjectures on p-adic L-functions attached to (the adjoint of) a weight one modular form. In the case of monomial representations, we prove that our conjectures are essentially equivalent to some newly introduced Iwasawa-theoretic conjectures for Rubin-Stark elements. [less ▲]Detailed reference viewed: 40 (0 UL) The role of score and information bias in panel data likelihoodsSchumann, Martin; Severini, Thomas A.; Tripathi, Gautam E-print/Working paper (2021)Detailed reference viewed: 79 (13 UL) Harmonic amplitude summation for frequency-tagging analysisRetter, Talia ; Rossion, Bruno; Schiltz, Christine E-print/Working paper (2021)In the approach of frequency tagging, stimuli that are presented periodically generate periodic responses of the brain. Following a transformation into the frequency domain, the brain’s response is ... [more ▼]In the approach of frequency tagging, stimuli that are presented periodically generate periodic responses of the brain. Following a transformation into the frequency domain, the brain’s response is evident often at the frequency of stimulation, F, and its higher harmonics (2F, 3F, etc.). This approach is increasingly used in neuroscience, as it affords objective measures to characterize brain function. However, whether these specific harmonic frequency responses should be combined for analysis, and if so, how, remains an outstanding issue. In most studies, higher harmonic responses have not been described or were described only individually; in other studies, harmonics have been combined with various approaches, e.g., averaging and root mean squared summation. A rationale for these approaches in the context of frequency-based analysis principles, and understanding of how they relate to the brain’s response amplitudes in the time domain, has been missing. Here, with these elements addressed, the summation of (baseline-corrected) harmonic amplitude is recommended. [less ▲]Detailed reference viewed: 34 (0 UL) Tax competition and phantom FDIZanaj, Skerdilajda E-print/Working paper (2021)Detailed reference viewed: 94 (22 UL) Remuneration Debacle at the International Criminal Court: Should ICC Judges Get a Pay Rise? Part IIOwiso, Owiso E-print/Working paper (2020)Detailed reference viewed: 20 (0 UL) Remuneration Debacle at the International Criminal Court: Should ICC Judges Get a Pay Rise? Part IOwiso, Owiso E-print/Working paper (2020)Detailed reference viewed: 20 (0 UL) ESG Data and Reporting in the Forefront of Sustainability: Challenges and the Way ForwardAlexandraki, Chrysa E-print/Working paper (2020)Detailed reference viewed: 41 (3 UL) Exploring Governance Issues between the SRB and the ESM in the Use of the Common BackstopLupinu, Pier Mario E-print/Working paper (2020)To date, the resolution of the Banco Popular Español, being the first and only resolution case in the euro area, has had the “benefit” of bringing to light several shortfalls of this crisis management ... [more ▼]To date, the resolution of the Banco Popular Español, being the first and only resolution case in the euro area, has had the “benefit” of bringing to light several shortfalls of this crisis management system. Back then, thanks to the sale of business, the need of the use of the Single Resolution Fund (SRF) has been avoided, prompting criticism on whether the fund had sufficient means to overcome a major widespread crisis. During the period elapsed from the last financial crisis, the euro area banking sector has built capital and liquidity buffers, which were aimed at protecting them for future shocks. Although it is now widely accepted that crises are of a cyclical nature, new risks and the high interconnectivity of today’s economic activities brought an unexpected crisis due to the current pandemic. The consequences of this unprecedented event in modern history had severe effects to the worldwide economy, mostly for the boundless block of labour activities, which caused severe losses for households, enterprises and governments that consequently affected the financial intermediation function of the banks. Concerning the European Stability Mechanism (ESM), the current pandemic has had the effect to put temporary on hold the discussion on the revision of the ESM Treaty, including its role as a Backstop to the SRF, so that the Mechanism could experience a new role through the ESM Pandemic Crisis Support. In such a framework, this paper aims to bring back the attention to the unfinished path in the establishment of the Common Backstop by addressing an important element of risk, namely its decision-making process. The main aim is to explore possible governance issues, which could hamper a timely and effective use of the Common Backstop, in the case that the SRF would be depleted and no alternative funding sources would be available. [less ▲]Detailed reference viewed: 22 (3 UL) Anatomie de l'Europe médiévale. L’âge féodal : la parcellisation du pouvoir (fin IXe – fin XIIe s.)Margue, Michel E-print/Working paper (2020)Detailed reference viewed: 18 (0 UL) A NEW CORRESPONDENCE BETWEEN TASEPAND BURGERS’ EQUATIONFlandoli, Franco; Gess, Benjamin; Grotto, Francesco E-print/Working paper (2020)We introduce a new particle model, which we dub Active Bi-Directional Flow, conjugated to the Totally Asymmetric Exclusion Processin discrete time. We then associate to our model intrinsically stochastic ... [more ▼]We introduce a new particle model, which we dub Active Bi-Directional Flow, conjugated to the Totally Asymmetric Exclusion Processin discrete time. We then associate to our model intrinsically stochastic, non-entropic weak solutions of Burgers’ equation onR, thus linking the latter tothe KPZ universality class. [less ▲]Detailed reference viewed: 17 (0 UL) Wie haben sich emotionale Anforderungen für Arbeitnehmer in Luxemburg über die Zeit entwickelt?Sischka, Philipp ; Steffgen, Georges E-print/Working paper (2020)Im Rahmen dieser Newsletter wird analysiert, wie sich emotionale Anforderungen für Arbeitnehmer in Luxemburg über die letzten Jahre entwickelt haben. Emotionale Anforderungen sind mit reduziertem Well ... [more ▼]Im Rahmen dieser Newsletter wird analysiert, wie sich emotionale Anforderungen für Arbeitnehmer in Luxemburg über die letzten Jahre entwickelt haben. Emotionale Anforderungen sind mit reduziertem Well-Being assoziiert. Dabei weisen Arbeitnehmer mit ausgeprägten emotionalen Anforderungen insbesondere ein höheres Burnoutlevel auf. Zwischen 2016 und 2020 kam es zu einem deutlichen Anstieg der emotionalen Anforderungen. Arbeitnehmerinnen weisen über die Zeit konstant höhere emotionale Anforderungen auf im Vergleich zu Arbeitnehmern. Insbesondere Arbeitnehmer in akademischen Berufen, Manager und Arbeitnehmer in Dienstleistungsberufen weisen über die Zeit konstant hohe emotionale Anforderungen auf. Bediener von Anlagen und Hilfsarbeitskräfte weisen dagegen einen Anstieg zwischen 2016 und 2020 auf. [less ▲]Detailed reference viewed: 24 (1 UL) Homogeneous selection promotes microdiversity in the glacier-fed stream microbiomeFodelianakis, Styliianos; Busi, Susheel Bhanu ; Wilmes, Paul et alE-print/Working paper (2020)Microdiversity, the organization of microorganisms into groups with closely related but ecologically different sub-types, is widespread and represents an important linchpin between microbial ecology and ... [more ▼]Microdiversity, the organization of microorganisms into groups with closely related but ecologically different sub-types, is widespread and represents an important linchpin between microbial ecology and evolution. However, the drivers of microdiversification remain largely unknown. Here we show that selection promotes microdiversity in the microbiome associated with sediments in glacier-fed streams (GFS). Applying a novel phylogenetic framework, we identify several clades that are under homogeneous selection and that contain genera with higher levels of microdiversity than the rest of the genera. Overall these clades constituted ~44% and ~64% of community α-diversity and abundance, and both percentages increased further in GFS that were largely devoid of primary producers. Our findings show that strong homogeneous selection drives the microdiversification of specialized microbial groups putatively underlying their success in the extreme environment of GFS. This microdiversity could be threatened as glaciers shrink, with unknown consequences for microbial diversity and functionality in these ecosystems. [less ▲]Detailed reference viewed: 86 (2 UL) Common pool resource management and risk perceptionsMavi, Can Askan ; Quérou, NicolasE-print/Working paper (2020)Motivated by recent discussions about the issue of risk perceptions for climate change related events, we introduce a non-cooperative game setting where agents manage a common pool resource under a ... [more ▼]Motivated by recent discussions about the issue of risk perceptions for climate change related events, we introduce a non-cooperative game setting where agents manage a common pool resource under a potential risk, and agents exhibit different risk perception biases. Focusing on the effect of the polarization level and other population features, we show that the type of bias (overestimation versus underestimation biases) and the resource quality level before and after the occurrence of the shift have first-order importance on the qualitative nature of behavioral adjustments and on the pattern of resource conservation. When there are non-uniform biases within the population, the intra-group structure of the population qualitatively affects the degree of resource conservation. Moreover, unbiased agents may react in nonmonotone ways to changes in the polarization level when faced with agents exhibiting different types of bias. The size of the unbiased agents’ sub-population does not qualitatively affect how an increase in the polarization level impacts individual behavioral adjustments, even though it affects the magnitude of this change. Finally, it is shown how perception biases affect the comparison between centralized and decentralized management. [less ▲]Detailed reference viewed: 49 (0 UL) Development and Validation of the Revised Multicultural Ideology Scale in Germany and LuxembourgStogianni, Maria ; Berry, John; Grigoryev, Dmitry et alE-print/Working paper (2020)A revised version of the Multicultural Ideology Scale (rMCI; Berry 2020; Berry et al., 1977) is currently being developed to measure endorsement of multiculturalism in different cultural contexts. The ... [more ▼]A revised version of the Multicultural Ideology Scale (rMCI; Berry 2020; Berry et al., 1977) is currently being developed to measure endorsement of multiculturalism in different cultural contexts. The current study, which is part of this cross-cultural research project, presents the first assessment of the rMCI scale in the German language. The measure aims to cover several attitudinal dimensions of multiculturalism, relevant to the integration of different ethnocultural groups: Cultural Maintenance, Equity/Inclusion, Social interaction, Essentialistic Boundaries, Extent of Differences, and Consequences of Diversity. Two independent datasets were acquired from Germany (N = 382) and Luxembourg (N = 148) to estimate the factor structure of the rMCI using different confirmatory factor analysis techniques. The findings suggest that a 4-factor solution, including Cultural Maintenance, Equity/Inclusion, Social interaction, and Consequences of Diversity, was the best fit for the data. Most of these subscales demonstrated adequate psychometric properties (internal consistency, convergent, and discriminant validity). The 4-factor model of the rMCI was partially invariant across the two ethnic groups and full measurement invariance was established across gender. [less ▲]Detailed reference viewed: 58 (6 UL) The solution of the immigrant paradox: aspirations and expectations of children of migrantsZanaj, Skerdilajda E-print/Working paper (2020)Detailed reference viewed: 26 (2 UL) THIS TIME IS REALLY DIFFERENT: FLIGHT-TO-SAFETY AND THE COVID-19 CRISISLöwen, Celina; Kchouri, Bilal ; Lehnert, Thorsten E-print/Working paper (2020)Detailed reference viewed: 77 (4 UL) Age, Intentions and the Implicit Role of Out-Selection Factors of International MigrationBeine, Michel E-print/Working paper (2020)In this paper, I propose to isolate the role of age as a self-selection factor of international migration. The role of age is estimated on intended emigration rather than on observed outcomes of migration ... [more ▼]In this paper, I propose to isolate the role of age as a self-selection factor of international migration. The role of age is estimated on intended emigration rather than on observed outcomes of migration, using individual measures of intended emigration drawn from a large-scale survey conducted by Gallup. I find evidence that age has a monotonic negative effect on desired emigration for the working-age population. The estimations point to a very robust effect, suggesting that an additional year of age decreases the probability of intended emigration by about 0.5%. This effect is steady over different periods of time and for most types of countries of origin. The results contrast with previous evidence obtained on observed outcomes of migration, suggesting that out-selection factors interact with age and shape the demographic profile of migrants. [less ▲]Detailed reference viewed: 24 (4 UL) In-plane magnetic field-driven symmetry breaking in topological insulator-based three-terminal junctionsKölzer, Jonas; Moors, Kristof; Schmidt, Thomas et alE-print/Working paper (2020)Detailed reference viewed: 17 (0 UL) A hybrid MGA-MSGD ANN training approach for approximate solution of linear elliptic PDEsDehghani, Hamidreza ; Zilian, Andreas E-print/Working paper (2020)We introduce a hybrid "Modified Genetic Algorithm-Multilevel Stochastic Gradient Descent" (MGA-MSGD) training algorithm that considerably improves accuracy and efficiency of solving 3D mechanical problems ... [more ▼]We introduce a hybrid "Modified Genetic Algorithm-Multilevel Stochastic Gradient Descent" (MGA-MSGD) training algorithm that considerably improves accuracy and efficiency of solving 3D mechanical problems described, in strong-form, by PDEs via ANNs (Artificial Neural Networks). This presented approach allows the selection of a number of locations of interest at which the state variables are expected to fulfil the governing equations associated with a physical problem. Unlike classical PDE approximation methods such as finite differences or the finite element method, there is no need to establish and reconstruct the physical field quantity throughout the computational domain in order to predict the mechanical response at specific locations of interest. The basic idea of MGA-MSGD is the manipulation of the learnable parameters’ components responsible for the error explosion so that we can train the network with relatively larger learning rates which avoids trapping in local minima. The proposed training approach is less sensitive to the learning rate value, training points density and distribution, and the random initial parameters. The distance function to minimise is where we introduce the PDEs including any physical laws and conditions (so-called, Physics Informed ANN). The Genetic algorithm is modified to be suitable for this type of ANN in which a Coarse-level Stochastic Gradient Descent (CSGD) is exploited to make the decision of the offspring qualification. Employing the presented approach, a considerable improvement in both accuracy and efficiency, compared with standard training algorithms such classical SGD and Adam optimiser, is observed. The local displacement accuracy is studied and ensured by introducing the results of Finite Element Method (FEM) at sufficiently fine mesh as the reference displacements. A slightly more complex problem is solved ensuring the feasibility of the methodology [less ▲]Detailed reference viewed: 60 (0 UL) Empowering Large Chemical Knowledge Bases for Exposomics: PubChemLite Meets MetFragSchymanski, Emma ; Kondic, Todor ; Neumann, Steffen et alE-print/Working paper (2020)Detailed reference viewed: 78 (0 UL) Semantic and Relational Spaces in Science of Science: Deep Learning Models for Article VectorisationKozlowski, Diego ; Dusdal, Jennifer ; Pang, Jun et alE-print/Working paper (2020)Over the last century, we observe a steady and exponentially growth of scientific publications globally. The overwhelming amount of available literature makes a holistic analysis of the research within a ... [more ▼]Over the last century, we observe a steady and exponentially growth of scientific publications globally. The overwhelming amount of available literature makes a holistic analysis of the research within a field and between fields based on manual inspection impossible. Automatic techniques to support the process of literature review are required to find the epistemic and social patterns that are embedded in scientific publications. In computer sciences, new tools have been developed to deal with large volumes of data. In particular, deep learning techniques open the possibility of automated end-to-end models to project observations to a new, low-dimensional space where the most relevant information of each observation is highlighted. Using deep learning to build new representations of scientific publications is a growing but still emerging field of research. The aim of this paper is to discuss the potential and limits of deep learning for gathering insights about scientific research articles. We focus on document-level embeddings based on the semantic and relational aspects of articles, using Natural Language Processing (NLP) and Graph Neural Networks (GNNs). We explore the different outcomes generated by those techniques. Our results show that using NLP we can encode a semantic space of articles, while with GNN we are able to build a relational space where the social practices of a research community are also encoded. [less ▲]Detailed reference viewed: 31 (9 UL) Corona-Zeiten, Corona Räume: Alltägliche Raumkonstruktion vor dem Hintergrund der Eindämmung der Covid-19-Pandemie im SaarlandMellinger, Lukas E-print/Working paper (2020)In der Reaktion auf die Ausbreitung der Covid-19-Pandemie kam es weltweit für viele Menschen zum Bruch sozialer und räumlicher Routinen. In Deutschland haben die Landesregierungen die führende Rolle beim ... [more ▼]In der Reaktion auf die Ausbreitung der Covid-19-Pandemie kam es weltweit für viele Menschen zum Bruch sozialer und räumlicher Routinen. In Deutschland haben die Landesregierungen die führende Rolle beim Versuchübernommen, durch Verfügungen und Verordnungen die weitere Ausbreitung der Pandemie einzu-dämmen. In diesem Kontexthatdie Art und Weise wie Gesetze und Regeln Alltagsräume durchdringen für viele Menschen eine neue (unmittelbar erlebbare) Dimension angenommen. Ziel dieses Beitrags ist es,mit einem Fokus auf die getroffenenMaßnahmen der saarländischen Landesregierung diesbezüglich eine lo-kale Perspektive zu entwickeln. Durch die qualitative Methode der Autofotographie werden dabei individu-elle Sichtweisen auf das zugrundeliegendeWechselspiel von Recht, Raum und Gesellschaft in den Vorder-grund der Analyse gestellt.Durch den Blick auf sozialräumliche Zusammenhänge werden so die Auswirkun-gen der getroffenen Maßnahmen hinterfragt. [less ▲]Detailed reference viewed: 61 (8 UL) Linear Z2n-Manifolds and Linear ActionsBruce, Andrew ; Ibarguengoytia, Eduardo ; Poncin, Norbert E-print/Working paper (2020)Detailed reference viewed: 50 (2 UL) Gender bias in magazines oriented to men and women: a computational approachKozlowski, Diego ; Lozano, Gabriela; Fletcher, Carla M. et alE-print/Working paper (2020)Cultural products are a source to acquire individual values and behaviours. Therefore, the differences in the content of the magazines aimed specifically at women or men are a means to create and ... [more ▼]Cultural products are a source to acquire individual values and behaviours. Therefore, the differences in the content of the magazines aimed specifically at women or men are a means to create and reproduce gender stereotypes. In this study, we compare the content of a women-oriented magazine with that of a men-oriented one, both produced by the same editorial group, over a decade (2008-2018). With Topic Modelling techniques we identify the main themes discussed in the magazines and quantify how much the presence of these topics differs between magazines over time. Then, we performed a word-frequency analysis to validate this methodology and extend the analysis to other subjects that did not emerge automatically. Our results show that the frequency of appearance of the topics Family, Business and Women as sex objects, present an initial bias that tends to disappear over time. Conversely, in Fashion and Science topics, the initial differences between both magazines are maintained. Besides, we show that in 2012, the content associated with horoscope increased in the women-oriented magazine, generating a new gap that remained open over time. Also, we show a strong increase in the use of words associated with feminism since 2015 and specifically the word abortion in 2018. Overall, these computational tools allowed us to analyse more than 24,000 articles. Up to our knowledge, this is the first study to compare magazines in such a large dataset, a task that would have been prohibitive using manual content analysis methodologies [less ▲]Detailed reference viewed: 12 (1 UL) Rate of estimation for the stationary distribution of jump-processes over anisotropic Holder classes.Amorino, Chiara E-print/Working paper (2020)We study the problem of the non-parametric estimation for the density π of the stationary distribution of the multivariate stochastic differential equation with jumps (Xt)0≤t≤T , when the dimension d is ... [more ▼]We study the problem of the non-parametric estimation for the density π of the stationary distribution of the multivariate stochastic differential equation with jumps (Xt)0≤t≤T , when the dimension d is such that d ≥ 3. From the continuous observa- tion of the sampling path on [0, T ] we show that, under anisotropic H ̈older smoothness constraints, kernel based estimators can achieve fast convergence rates. In particu- lar, they are as fast as the ones found by Dalalyan and Reiss [9] for the estimation of the invariant density in the case without jumps under isotropic H ̈older smooth- ness constraints. Moreover, they are faster than the ones found by Strauch [29] for the invariant density estimation of continuous stochastic differential equations, under anisotropic H ̈older smoothness constraints. Furthermore, we obtain a minimax lower bound on the L2-risk for pointwise estimation, with the same rate up to a log(T) term. It implies that, on a class of diffusions whose invariant density belongs to the anisotropic Holder class we are considering, it is impossible to find an estimator with a rate of estimation faster than the one we propose. [less ▲]Detailed reference viewed: 22 (4 UL) On the nonparametric inference of coefficients of self-exciting jump-diffusionAmorino, Chiara ; Dion, Charlotte; Gloter, Arnaud et alE-print/Working paper (2020)In this paper, we consider a one-dimensional diffusion process with jumps driven by a Hawkes process. We are interested in the estimations of the volatility function and of the jump function from discrete ... [more ▼]In this paper, we consider a one-dimensional diffusion process with jumps driven by a Hawkes process. We are interested in the estimations of the volatility function and of the jump function from discrete high-frequency observations in long time horizon. We first propose to estimate the volatility coefficient. For that, we introduce in our estimation procedure a truncation function that allows to take into account the jumps of the process and we estimate the volatility function on a linear subspace of L 2 (A) where A is a compact interval of R. We obtain a bound for the empirical risk of the volatility estimator and establish an oracle inequality for the adaptive estimator to measure the performance of the procedure. Then, we propose an estimator of a sum between the volatility and the jump coefficient modified with the conditional expectation of the intensity of the jumps. The idea behind this is to recover the jump function. We also establish a bound for the empirical risk for the non-adaptive estimator of this sum and an oracle inequality for the final adaptive estimator. We conduct a simulation study to measure the accuracy of our estimators in practice and we discuss the possibility of recovering the jump function from our estimation procedure. [less ▲]Detailed reference viewed: 24 (1 UL) Robust Estimation of a Regression Function in Exponential FamiliesBaraud, Yannick ; Chen, Juntong E-print/Working paper (2020)Detailed reference viewed: 119 (26 UL) Conical SL(3) foamsKhovanov, Mikhail; Robert, Louis-Hadrien E-print/Working paper (2020)Detailed reference viewed: 8 (4 UL) Getzler-Kapranov complexes and moduli stacks of curvesKalugin, Alexey E-print/Working paper (2020)Detailed reference viewed: 129 (16 UL) Anonymous proof-ofasset transactions using pairing-based designated blind signaturesSharma, Neetu; Sahu, Rajeev Anand ; Saraswat, Vishal et alE-print/Working paper (2020)Detailed reference viewed: 25 (1 UL) SARS-CoV-2 Transmission in Educational Settings During an Early Summer Epidemic Wave in LuxembourgMossong, Joël; Mombaerts, Laurent ; Veiber, Lisa et alE-print/Working paper (2020)Background: The role of schools and children in the transmission of SARS-CoV-2 remains to be determined. Following a first wave in spring and gradual easing of lockdown, Luxembourg experienced an early ... [more ▼]Background: The role of schools and children in the transmission of SARS-CoV-2 remains to be determined. Following a first wave in spring and gradual easing of lockdown, Luxembourg experienced an early second epidemic wave before the start of summer school holidays on 15th July. This provided the opportunity to study the role of school-age children and school settings in SARS-CoV-2 transmission. More specifically, we compared the incidence in school-age children, teachers and the general working population, and estimated the number of secondary transmissions occurring at schools using contact tracing data. Findings: While SARS-CoV-2 incidence was much higher in adults aged 20 and above than in children aged 0 to 19 during the first wave in spring, no significant difference was found during the second wave in early summer. The incidence during the second wave was similar for pupils, teachers and the general working population. Based on a total of 424 reported confirmed COVID-19 cases in school-age children and teachers, we estimate that 179 index cases caused 49 secondary transmissions in schools. While some small clusters of mainly student-to-student transmission within the same class were identified, we did not observe any large outbreaks with multiple generations of infection. Interpretation: Transmission of SARS-CoV-2 within Luxembourg schools was limited during the early summer epidemic wave in 2020. Precautionary measures including physical distancing as well as easy access to testing, systematic contact tracing appears to have been successful in mitigating transmission within educational settings. Funding Statement: LV is supported by the Luxembourg National Research Fund grant COVID-19/2020- 1/14701707/REBORN, LM is supported by Luxembourg National Research Fund grant COVID19/14863306/PREVID, PW is supported by the European Research Council (ERC-CoG 863664). Declaration of Interests: No competing interests. Ethics Approval Statement: The Health Directorate has the legal permission to process patient confidential information for national surveillance of communicable diseases in general and contact tracing for the COVID-19 pandemic and individual patient consent is not required. [less ▲]Detailed reference viewed: 147 (7 UL) Local Forms of Morphisms of Colored SupermanifoldsCovolo, Tiffany; Kwok, Stephen; Poncin, Norbert E-print/Working paper (2020)Detailed reference viewed: 108 (0 UL) Dimension-free Harnack inequalities for conjugate heat equations and their applications to geometric flowsCheng, Li-Juan; Thalmaier, Anton E-print/Working paper (2020)Let M be a differentiable manifold endowed with a family of complete Riemannian metrics g(t) evolving under a geometric flow over the time interval [0,T[. In this article, we give a probabilistic ... [more ▼]Let M be a differentiable manifold endowed with a family of complete Riemannian metrics g(t) evolving under a geometric flow over the time interval [0,T[. In this article, we give a probabilistic representation for the derivative of the corresponding conjugate semigroup on M which is generated by a Schrödinger type operator. With the help of this derivative formula, we derive fundamental Harnack type inequalities in the setting of evolving Riemannian manifolds. In particular, we establish a dimension-free Harnack inequality and show how it can be used to achieve heat kernel upper bounds in the setting of moving metrics. Moreover, by means of the supercontractivity of the conjugate semigroup, we obtain a family of canonical log-Sobolev inequalities. We discuss and apply these results both in the case of the so-called modified Ricci flow and in the case of general geometric flows. [less ▲]Detailed reference viewed: 56 (1 UL) ‘Grading’ the Nominees for the International Criminal Court Judges Election 2021-2030: The Report of the Advisory Committee on Nomination of Judges—Part IIOwiso, Owiso ; Sharon, E-print/Working paper (2020)Detailed reference viewed: 143 (8 UL) ‘Grading’ the Nominees for the International Criminal Court Judges Election 2021-2030: The Report of the Advisory Committee on Nomination of Judges—Part IOwiso, Owiso ; Sharon, NakandhaE-print/Working paper (2020)Detailed reference viewed: 90 (4 UL) Between Discretion and Proportionality: The Duty of Care in EU Judicial ReviewHofmann, Herwig E-print/Working paper (2020)Detailed reference viewed: 43 (3 UL) A generalization of Krull-Webster's theory to higher order convex functions: multiple gamma-type functionsMarichal, Jean-Luc ; Zénaïdi, NaïmE-print/Working paper (2020)We provide uniqueness and existence results for the eventually $p$-convex and eventually $p$-concave solutions to the difference equation $\Delta f=g$ on the open half-line $(0,\infty)$, where $p$ is a ... [more ▼]We provide uniqueness and existence results for the eventually $p$-convex and eventually $p$-concave solutions to the difference equation $\Delta f=g$ on the open half-line $(0,\infty)$, where $p$ is a given nonnegative integer and $g$ is a given function satisfying the asymptotic property that the sequence $n\mapsto\Delta^p g(n)$ converges to zero. These solutions, that we call $\log\Gamma_p$-type functions, include various special functions such as the polygamma functions, the logarithm of the Barnes $G$-function, and the Hurwitz zeta function. Our results generalize to any nonnegative integer $p$ the special case when $p=1$ obtained by Krull and Webster, who both generalized Bohr-Mollerup-Artin's characterization of the gamma function. We also follow and generalize Webster's approach and provide for $\log\Gamma_p$-type functions analogues of Euler's infinite product, Weierstrass' infinite product, Gauss' limit, Gauss' multiplication formula, Legendre's duplication formula, Euler's constant, Stirling's constant, Stirling's formula, Wallis's product formula, and Raabe's formula for the gamma function. We also introduce and discuss analogues of Binet's function, Burnside's formula, Fontana-Mascheroni's series, Euler's reflection formula, and Gauss' digamma theorem. Lastly, we apply our results to several special functions, including the Hurwitz zeta function and the generalized Stieltjes constants, and show through these examples how powerful is our theory to produce formulas and identities almost systematically. [less ▲]Detailed reference viewed: 57 (11 UL) Enforcing EU law: the case of the whistle-blowerKafteranis, Dimitrios E-print/Working paper (2020)Detailed reference viewed: 18 (0 UL) Time to reconsider Strasbourg's whistleblower case lawKafteranis, Dimitrios ; Robert, BrockhausE-print/Working paper (2020)Detailed reference viewed: 28 (0 UL) The European Citizens Initiative: diversifying policy debates at European levelHiry, Jasmin E-print/Working paper (2020)Detailed reference viewed: 29 (1 UL) The Luxembourg COVID-Kids questionnaireKirsch, Claudine ; Engel de Abreu, Pascale ; Neumann, Sascha E-print/Working paper (2020)Detailed reference viewed: 42 (3 UL) Der Arbeitsmarkt der Sozialen Arbeit 2019 = Le marché de l'emploi du secteur social en 2019Böwen, Petra ; Flammang, Manou Laure E-print/Working paper (2020)This newsletter describes the job market in the social work sector in Luxembourg in 2019. The data are derived from an ongoing research project by the PraxisBüro of the University of Luxembourg. The ... [more ▼]This newsletter describes the job market in the social work sector in Luxembourg in 2019. The data are derived from an ongoing research project by the PraxisBüro of the University of Luxembourg. The newsletter presents a selection of statistics concerning for example the most sought after qualification levels, the distribution of practice fields, the distribution of job offers on public, municipal, privat an non-governmental organisations an the documented gab between the demand of social workers with a Bachelor diploma and the number of Bachelor diplomas issued in Luxembourg [less ▲]Detailed reference viewed: 585 (30 UL) On the Composition and Limitations of Publicly Available COVID-19 X-Ray Imaging DatasetsGarcia Santa Cruz, Beatriz ; Sölter, Jan ; Bossa, Matias Nicolas et alE-print/Working paper (2020) Machine learning based methods for diagnosis and progression prediction of COVID-19 from imaging data have gained significant attention in the last months, in particular by the use of deep learning ... [more ▼] Machine learning based methods for diagnosis and progression prediction of COVID-19 from imaging data have gained significant attention in the last months, in particular by the use of deep learning models. In this context hundreds of models where proposed with the majority of them trained on public datasets. Data scarcity, mismatch between training and target population, group imbalance, and lack of documentation are important sources of bias, hindering the applicability of these models to real-world clinical practice. Considering that datasets are an essential part of model building and evaluation, a deeper understanding of the current landscape is needed. This paper presents an overview of the currently public available COVID-19 chest X-ray datasets. Each dataset is briefly described and potential strength, limitations and interactions between datasets are identified. In particular, some key properties of current datasets that could be potential sources of bias, impairing models trained on them are pointed out. These descriptions are useful for model building on those datasets, to choose the best dataset according the model goal, to take into account the specific limitations to avoid reporting overconfident benchmark results, and to discuss their impact on the generalisation capabilities in a specific clinical setting. [less ▲]Detailed reference viewed: 269 (8 UL) Territorial patterns and relations in AustriaSzendrei, Greta ; Evrard, Estelle ; Nienaber, Birte et alE-print/Working paper (2020)Detailed reference viewed: 35 (4 UL) On the Gauss map of equivariant immersions in hyperbolic spaceEl Emam, Christian ; Seppi, AndreaE-print/Working paper (2020)Given an oriented immersed hypersurface in hyperbolic space H^{n+1}, its Gauss map is defined with values in the space of oriented geodesics of H^{n+1}, which is endowed with a natural para-Kähler ... [more ▼]Given an oriented immersed hypersurface in hyperbolic space H^{n+1}, its Gauss map is defined with values in the space of oriented geodesics of H^{n+1}, which is endowed with a natural para-Kähler structure. In this paper we address the question of whether an immersion G of the universal cover of an n-manifold M, equivariant for some group representation of π1(M) in Isom(H^{n+1}), is the Gauss map of an equivariant immersion in H^{n+1}. We fully answer this question for immersions with principal curvatures in (−1,1): while the only local obstructions are the conditions that G is Lagrangian and Riemannian, the global obstruction is more subtle, and we provide two characterizations, the first in terms of the Maslov class, and the second (for M compact) in terms of the action of the group of compactly supported Hamiltonian symplectomorphisms [less ▲]Detailed reference viewed: 17 (0 UL) Symposium on Oumar Ba’s Book ‘States of Justice: The Politics of the International Criminal Court’–Introductory PostOwiso, Owiso E-print/Working paper (2020)Detailed reference viewed: 85 (3 UL) The Flow of Information Among Authorities Involved in the Banking Union’s Resolution Procedure: The Case of the SRB and the ECBLupinu, Pier Mario E-print/Working paper (2020)The flow of information is vital for the smooth functioning and certainty of the successful outcome of a resolution procedure during resolution planning and execution. As a result, the exchange of ... [more ▼]The flow of information is vital for the smooth functioning and certainty of the successful outcome of a resolution procedure during resolution planning and execution. As a result, the exchange of relevant information has become highly influential in current debates. This article will focus on the exchange of information between the Single Resolution Board (SRB) and the European Central Bank (ECB). Firstly, the Authorities decided to arrange the rules for sharing information bilaterally in the form of a Memorandum of Understanding (MoU). While this framework of cooperation and exchange of information between the SRB and the ECB constitutes an obligation under Article 30(7) of the Single Resolution Mechanism Regulation (SRMR), it was drafted in the non-binding form of an MoU. The general purpose of an MoU is to establish the basis for cooperation and convergence of intentions. Such foundations aim to strengthen the resolution procedure by joining forces to obtain more accurate and complete data with better coordination of tasks and resources in order to achieve the most solid result possible within a tighter timeframe. [less ▲]Detailed reference viewed: 150 (5 UL) UAV Relay-Assisted Emergency Communications in IoT Networks: Resource Allocation and Trajectory OptimizationTran Dinh, Hieu ; Nguyen, van Dinh ; Gautam, Sumit et alE-print/Working paper (2020)Unmanned aerial vehicle (UAV) communication has emerged as a prominent technology for emergency communications (e.g., natural disaster) in Internet of Things (IoT) networks to enhance the ability of ... [more ▼]Unmanned aerial vehicle (UAV) communication has emerged as a prominent technology for emergency communications (e.g., natural disaster) in Internet of Things (IoT) networks to enhance the ability of disaster prediction, damage assessment, and rescue operations promptly. In this paper, a UAV is deployed as a flying base station (BS) to collect data from time-constrained IoT devices and then transfer the data to a ground gateway (GW). In general, the latency constraint at IoT users and the limited storage capacity of UAV highly hinder practical applications of UAV-assisted IoT networks. In this paper, full-duplex (FD) technique is adopted at the UAV to overcome these challenges. In addition, half-duplex (HD) scheme for UAV-based relaying is also considered to provide a comparative study between two modes (viz., FD and HD). Herein, a device is successfully served iff its data is collected by UAV and conveyed to GW within the flight time. In this context, we aim at maximizing the number of served IoT devices by jointly optimizing bandwidth and power allocation, as well as the UAV trajectory, while satisfying the requested timeout (RT) requirement of each device and the UAV’s limited storage capacity. The formulated optimization problem is troublesome to solve due to its non-convexity and combinatorial nature. Toward appealing applications, we first relax binary variables into continuous values and transform the original problem into a more computationally tractable form. By leveraging inner approximation framework, we derive newly approximated functions for non-convex parts and then develop a simple yet efficient iterative algorithm for its solutions. Next, we attempt to maximize the total throughput subject to the number of served IoT devices. Finally, numerical results show that the proposed algorithms significantly outperform benchmark approaches in terms of the number of served IoT devices and the amount of collected data. [less ▲]Detailed reference viewed: 37 (2 UL) The prestige and status of research fields within mathematicsSchlenker, Jean-Marc E-print/Working paper (2020)While the hierarchy of science'' has been widely analysed, there is no corresponding study of the status of subfields within a given scientific field. We use bibliometric data to show that subfields of ... [more ▼]While the hierarchy of science'' has been widely analysed, there is no corresponding study of the status of subfields within a given scientific field. We use bibliometric data to show that subfields of mathematics have a different standing'' within the mathematics community. Highly ranked departments tend to specialize in some subfields more than in others, and the same subfields are also over-represented in the most selective mathematics journals or among recipients of top prizes. Moreover this status of subfields evolves markedly over the period of observation (1984--2016), with some subfields gaining and others losing in standing. The status of subfields is related to different publishing habits, but some of those differences are opposite to those observed when considering the hierarchy of scientific fields. We examine possible explanations for the status'' of different subfields. Some natural explanations -- availability of funding, importance of applications -- do not appear to function, suggesting that factors internal to the discipline are at work. We propose a different type of explanation, based on a notion of focus'' of a subfield, that might or might not be specific to mathematics. [less ▲]Detailed reference viewed: 42 (1 UL) Election Verifiability Revisited: Automated Security Proofs and Attacks on Helios and BeleniosBaloglu, Sevdenur ; Bursuc, Sergiu ; Mauw, Sjouke et alE-print/Working paper (2020)Election verifiability aims to ensure that the outcome produced by electronic voting systems correctly reflects the intentions of eligible voters, even in the presence of an adversary that may corrupt ... [more ▼]Election verifiability aims to ensure that the outcome produced by electronic voting systems correctly reflects the intentions of eligible voters, even in the presence of an adversary that may corrupt various parts of the voting infrastructure. Protecting such systems from manipulation is challenging because of their distributed nature involving voters, election authorities, voting servers and voting platforms. An adversary corrupting any of these can make changes that, individually, would go unnoticed, yet in the end will affect the outcome of the election. It is, therefore, important to rigorously evaluate whether the measures prescribed by election verifiability achieve their goals. We propose a formal framework that allows such an evaluation in a systematic and automated way. We demonstrate its application to the verification of various scenarios in Helios and Belenios, two prominent internet voting systems. For Helios, our analysis is the first one to be, at the same time, fully automated (with the Tamarin protocol prover) and to precisely capture its end-to-end verifiability guarantees, allow- ing us to derive new security proofs and new attacks on deployed versions of it. For Belenios, similarly, we capture precisely the end-to-end verifiability guarantees when all election authorities are corrupted, which is outside the scope of previous formal definitions. We also find new attacks that apply in weaker corruption scenarios that are expected to be secure. In general, our framework allows a unified analy- sis and comparison of cryptographic voting protocols, corruption scenarios and verifiability procedures towards ensuring the end goal of election integrity. [less ▲]Detailed reference viewed: 100 (3 UL)