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Using data from the Young Lives cohort study, we show the trend, changes ... [more ▼]We investigate the impact of three large-scale social-protection schemes in Ethiopia, India, and Peru on multidimensional poverty. Using data from the Young Lives cohort study, we show the trend, changes and evolution of multidimensional poverty for individuals in program participant households. We follow a number of strategies to produce estimates that deal with non-random program placement. Our findings show that both the incidence and intensity of multidimensional poverty declined in all three countries over the period 2006 - 2016, more so for program participants than non-participants. We find positive short-term impact on asset formation, livestock holding, and some living standard indicators. In all three countries these positive impacts are sustained even in the medium and longer-term. [less ▲]Detailed reference viewed: 28 (0 UL) Gaussian Random Measures Generated by Berry's Nodal SetsPeccati, Giovanni ; Vidotto, Annain Journal of Statistical Physics (in press)Detailed reference viewed: 72 (23 UL) On Rational Entailment for Propositional Typicality LogicBooth, Richard; Casini, Giovanni ; Meyer, Thomas et alin Artificial Intelligence and Law (in press)Propositional Typicality Logic (PTL) is a recently proposed logic, ob- tained by enriching classical propositional logic with a typicality opera- tor capturing the most typical (alias normal or ... [more ▼]Propositional Typicality Logic (PTL) is a recently proposed logic, ob- tained by enriching classical propositional logic with a typicality opera- tor capturing the most typical (alias normal or conventional) situations in which a given sentence holds. The semantics of PTL is in terms of ranked models as studied in the well-known KLM approach to preferen- tial reasoning and therefore KLM-style rational consequence relations can be embedded in PTL. In spite of the non-monotonic features introduced by the semantics adopted for the typicality operator, the obvious Tarskian definition of entailment for PTL remains monotonic and is therefore not appropriate in many contexts. Our first important result is an impossibil- ity theorem showing that a set of proposed postulates that at first all seem appropriate for a notion of entailment with regard to typicality cannot be satisfied simultaneously. Closer inspection reveals that this result is best interpreted as an argument for advocating the development of more than one type of PTL entailment. In the spirit of this interpretation, we in- vestigate three different (semantic) versions of entailment for PTL, each one based on the definition of rational closure as introduced by Lehmann and Magidor for KLM-style conditionals, and constructed using different notions of minimality. [less ▲]Detailed reference viewed: 95 (2 UL) The "failure" of cooperatives in Kyrgyzstan? A postcapitalist critique of a biased narrativeCima, Ottavia in Geographica Augustana (in press)Detailed reference viewed: 88 (6 UL) Weakly Inscribed Polyhedrachen, hao; Schlenker, Jean-Marc in Transactions of the American Mathematical Society. Series B (in press)Detailed reference viewed: 54 (1 UL) The effect of institutional dual holdings on CSR performanceLopatta, Kerstin; Bassen, Alexander; Kaspereit, Thomas et alin Journal of Sustainable Finance and Investment (in press)ABSTRACT This study sheds light on agency conflicts between creditors and shareholders and their effect on a firm's corporate social responsibility (CSR) performance. We find that the presence of ... [more ▼]ABSTRACT This study sheds light on agency conflicts between creditors and shareholders and their effect on a firm's corporate social responsibility (CSR) performance. We find that the presence of institutional investors which simultaneously hold debt and equity claims in the same firm, so-called dual holders, leads to an increase in CSR performance by the firm that is dual-held (the dual holding firm). Using institutional mergers between separate lenders and equity holders as a natural experiment involving the shareholder-creditor conflict, we find that firms which exhibit dual ownership for the first time increase their CSR activities to a greater extent than a matched control group. In line with the previous literature, we interpret our findings as evidence that dual holders internalise agency conflicts. Thus, we find that a reduction in agency conflicts between creditors and shareholders, partly achieved by dual holders, positively affects the CSR activities of dual holdings. [less ▲]Detailed reference viewed: 90 (9 UL) A Pharmacophore Model for SARS-CoV-2 3CLpro Small Molecule Inhibitors and in Vitro Experimental Validation of Computationally Screened InhibitorsGlaab, Enrico ; Manoharan, Ganesh Babu ; Abankwa, Daniel in Journal of Chemical Information and Modeling (in press)Among the biomedical efforts in response to the current coronavirus (COVID-19) pandemic, pharmacological strategies to reduce viral load in patients with severe forms of the disease are being studied ... [more ▼]Among the biomedical efforts in response to the current coronavirus (COVID-19) pandemic, pharmacological strategies to reduce viral load in patients with severe forms of the disease are being studied intensively. One of the main drug target proteins proposed so far is the SARS-CoV-2 viral protease 3CLpro (also called Mpro), an essential component for viral replication. Ongoing ligand- and receptor-based computational screening efforts would be facilitated by an improved understanding of the electrostatic, hydrophobic and steric features that characterize small molecule inhibitors binding stably to 3CLpro, as well as by an extended collection of known binders. Here, we present combined virtual screening, molecular dynamics simulation, machine learning and in vitro experimental validation analyses which have led to the identification of small molecule inhibitors of 3CLpro with micromolar activity, and to a pharmacophore model that describes functional chemical groups associated with the molecular recognition of ligands by the 3CLpro binding pocket. Experimentally validated inhibitors using a ligand activity assay include natural compounds with available prior knowledge on safety and bioavailability properties, such as the natural compound rottlerin (IC50 = 37 µM), and synthetic compounds previously not characterized (e.g. compound CID 46897844, IC50 = 31 µM). In combination with the developed pharmacophore model, these and other confirmed 3CLpro inhibitors may provide a basis for further similarity-based screening in independent compound databases and structural design optimization efforts, to identify 3CLpro ligands with improved potency and selectivity. Overall, this study suggests that the integration of virtual screening, molecular dynamics simulations and machine learning can facilitate 3CLpro-targeted small molecule screening investigations. Different receptor-, ligand- and machine learning-based screening strategies provided complementary information, helping to increase the number and diversity of identified active compounds. Finally, the resulting pharmacophore model and experimentally validated small molecule inhibitors for 3CLpro provide resources to support follow-up computational screening efforts for this drug target. [less ▲]Detailed reference viewed: 68 (9 UL) Invariant density adaptive estimation for ergodic jump diffusion processes over anisotropic classesAmorino, Chiara ; Gloter, Arnaudin Journal of Statistical Planning and Inference (in press)We consider the solution of a multivariate stochastic differential equation with Levy-type jumps and with unique invariant probability measure with density μ. We assume that a continuous record of ... [more ▼]We consider the solution of a multivariate stochastic differential equation with Levy-type jumps and with unique invariant probability measure with density μ. We assume that a continuous record of observations is available. In the case without jumps, Reiss and Dalalyan [7] and Strauch [24] have found convergence rates of invariant density estimators, under respectively isotropic and anisotropic H ̈older smoothness constraints, which are considerably faster than those known from standard multivariate density estimation. We extend the previous works by obtaining, in presence of jumps, some estimators which have the same convergence rates they had in the case without jumps for d ≥ 2 and a rate which depends on the degree of the jumps in the one-dimensional setting. We propose moreover a data driven bandwidth selection procedure based on the Goldenshluger and Lepski method [11] which leads us to an adaptive non-parametric kernel estimator of the stationary density μ of the jump diffusion X. [less ▲]Detailed reference viewed: 51 (8 UL) Financial performance and safety in the aviation industryFarnia, Pedram; Kaspereit, Thomas ; Walker, Thomas et alin International Journal of Managerial Finance (in press)This paper investigates whether financial factors, which are presumed to influence an airline's maintenance, purchasing, and training policies, are associated with the air carrier's safety performance.Detailed reference viewed: 51 (0 UL) Predicting correlated outcomes from molecular dataRauschenberger, Armin ; Glaab, Enrico in Bioinformatics (in press)Motivation: Multivariate (multi-target) regression has the potential to outperform univariate (single-target) regression at predicting correlated outcomes, which frequently occur in biomedical and ... [more ▼]Motivation: Multivariate (multi-target) regression has the potential to outperform univariate (single-target) regression at predicting correlated outcomes, which frequently occur in biomedical and clinical research. Here we implement multivariate lasso and ridge regression using stacked generalisation. Results: Our flexible approach leads to predictive and interpretable models in high-dimensional settings, with a single estimate for each input-output effect. In the simulation, we compare the predictive performance of several state-of-the-art methods for multivariate regression. In the application, we use clinical and genomic data to predict multiple motor and non-motor symptoms in Parkinson’s disease patients. We conclude that stacked multivariate regression, with our adaptations, is a competitive method for predicting correlated outcomes. Availability and Implementation: The R package joinet is available on GitHub (https://github.com/rauschenberger/joinet) and CRAN (https://CRAN.R-project.org/package=joinet). [less ▲]Detailed reference viewed: 53 (0 UL) Combining Genetic Programming and Model Checking to Generate Environment AssumptionsGaaloul, Khouloud ; Menghi, Claudio ; Nejati, Shiva et alin IEEE Transactions on Software Engineering (in press)Software verification may yield spurious failures when environment assumptions are not accounted for. Environment assumptions are the expectations that a system or a component makes about its operational ... [more ▼]Software verification may yield spurious failures when environment assumptions are not accounted for. Environment assumptions are the expectations that a system or a component makes about its operational environment and are often specified in terms of conditions over the inputs of that system or component. In this article, we propose an approach to automatically infer environment assumptions for Cyber-Physical Systems (CPS). Our approach improves the state-of-the-art in three different ways: First, we learn assumptions for complex CPS models involving signal and numeric variables; second, the learned assumptions include arithmetic expressions defined over multiple variables; third, we identify the trade-off between soundness and coverage of environment assumptions and demonstrate the flexibility of our approach in prioritizing either of these criteria. We evaluate our approach using a public domain benchmark of CPS models from Lockheed Martin and a component of a satellite control system from LuxSpace, a satellite system provider. The results show that our approach outperforms state-of-the-art techniques on learning assumptions for CPS models, and further, when applied to our industrial CPS model, our approach is able to learn assumptions that are sufficiently close to the assumptions manually developed by engineers to be of practical value. [less ▲]Detailed reference viewed: 84 (22 UL) Integrated STEAM Approach in Outdoor Trails with Elementary School Pre-service Teachers in LuxemburgHaas, Ben; Kreis, Yves ; Lavicza, Zsoltin Journal of Educational Technology and Society (in press), 24(4), Due to the COVID-19 pandemic it was impossible to carry out on-campus teaching and examinations as planned for the first-year elementary school Bachelor’s degree teacher training courses during the summer ... [more ▼]Due to the COVID-19 pandemic it was impossible to carry out on-campus teaching and examinations as planned for the first-year elementary school Bachelor’s degree teacher training courses during the summer term of 2019/2020. Therefore, we moved our on-campus STEAM (Science, Technology, Engineering, Arts and Mathematics) related courses to schooling at home. For their course examination, students designed outdoor trails in groups with the educational technology MathCityMap based on an integrated STEAM approach. Hence, they combined STEAM with real-world situations (e.g., monuments, marketplaces, playgrounds). The tasks within the trails required the use of technologies such as augmented reality (AR), digital modelling (e.g., GeoGebra 3D Graphing Calculator), and GPS. Analogue measuring tools (e.g., triangle ruler) were also used in the task designs. We collected data from 21 trails with 259 tasks from 49 pre-service teachers to analyse the effects on professional growth in STEAM education. Through hierarchical cluster analysis we identified three different clusters with patterns regarding STEAM in outdoor trails. This paper will describe a pedagogical framework for the integrated STEAM approach to designing and evaluating outdoor trails. Furthermore, we will explain patterns pre-service teachers developed during this professional development. [less ▲]Detailed reference viewed: 77 (8 UL) Making Elections Work: Accountability with Selection and ControlAnesi, Vincent ; Buisseret, Peterin American Economic Journal. Microeconomics (in press)We study the limits of dynamic electoral accountability when voters are uncertain about politicians’ characteristics (adverse selection) and their actions (moral hazard). Existing work argues that voters ... [more ▼]We study the limits of dynamic electoral accountability when voters are uncertain about politicians’ characteristics (adverse selection) and their actions (moral hazard). Existing work argues that voters cannot achieve their ﬁrst-best payoﬀ. This is attributed to inherent deﬁciencies of the electoral contract, including voters’ inability to pre-commit, and the restriction to a binary retention-replacement decision. We provide conditions under which, despite these constraints, voters can obtain arbitrarily close to the ﬁrst-best payoﬀ in an equilibrium of the electoral interaction. Our paper resolves that there need not be a trade-oﬀ between selection and control. [less ▲]Detailed reference viewed: 35 (0 UL) Event studies with daily stock returns in Stata: Which command to use?Kaspereit, Thomas in Stata Journal (in press)This article provides an overview of existing community-contributed commands for executing event studies. I assess which command(s) could have been used to conduct event studies that have appeared in the ... [more ▼]This article provides an overview of existing community-contributed commands for executing event studies. I assess which command(s) could have been used to conduct event studies that have appeared in the past ten years in three leading accounting, finance and management journals. The older command eventstudy provides a comfortable graphical user interface and good functionality for event studies that do not require hypotheses testing. The command estudy described in Pacicco et al. (2018, Stata Journal 18(2), pp. 416–476; 2020, Stata Journal, forthcoming) provides a set of commonly applied test statistics, useful exporting routines to spreadsheet software and LATEX for event studies with a limited number of events. The most complete command in terms of available test statistics and benchmark models as well as its ability to handle events with insufficient data, thin trading and large samples is eventstudy2 [less ▲]Detailed reference viewed: 119 (1 UL) Policy Experimentation in Committees: A Case Against Veto Rights Under Redistributive ConstraintsAnesi, Vincent ; Bowen, Reneein American Economic Journal. Microeconomics (in press)We study optimal policy experimentation by a committee. We consider a dynamic bargaining game in which committee members choose either a risky reform or a safe alternative each period. When no ... [more ▼]We study optimal policy experimentation by a committee. We consider a dynamic bargaining game in which committee members choose either a risky reform or a safe alternative each period. When no redistribution is allowed the unique equilibrium outcome is generically inefficient. When redistribution is allowed (even small amounts), there always exists an equilibrium that supports optimal experimentation for any voting rule without veto players. With veto players, however, optimal policy experimentation is possible only with a sufficient amount of redistribution. We conclude that veto rights are more of an obstacle to optimal policy experimentation than the constraints on redistribution themselves. [less ▲]Detailed reference viewed: 46 (1 UL) Functional Convergence of U-processes with Size-Dependent KernelsDöbler, Christian ; Kasprzak, Mikolaj ; Peccati, Giovanni in Annals of Applied Probability (in press)Detailed reference viewed: 38 (9 UL) Du mode bureaucratique vers l’agilité organisationnelle : le rôle de la communauté de pratique pilotée dans un établissement publicObringer, Lisa Désirée ; Geraudel, Mickaël ; Benedic, Michaelin Projectique (in press)Les établissements publics ont besoin de faire preuve d’agilité organisationnelle pour être performants et répondre aux nouveaux enjeux sociétaux. Cependant, ce besoin d’agilité est freiné par la logique ... [more ▼]Les établissements publics ont besoin de faire preuve d’agilité organisationnelle pour être performants et répondre aux nouveaux enjeux sociétaux. Cependant, ce besoin d’agilité est freiné par la logique bureaucratique qui sous-tend le fonctionnement-même de ces établissements. Résoudre cette tension paradoxale entre bureaucratie et agilité organisationnelle requiert de mettre en œuvre le processus d’acceptation et de management de la tension paradoxale. Pour ce faire, la communauté de pratique pilotée offre un cadre d’analyse favorisant cette acceptation et donc le changement organisationnel souhaité. Ainsi, nous montrons, au travers d’une recherche action, comment la communauté de pratiques pilotée favorise le changement organisationnel au sein d’un établissement public luxembourgeois en facilitant sa transition d’une logique bureaucratique vers une logique d’agilité organisationnelle. Les implications sont doubles. Premièrement, nous montrons comment manager la tension entre bureaucratie et agilité au sein d’un établissement public. Deuxièmement, nous mettons en lumière le rôle de la communauté de pratique pilotée comme vecteur de changement organisationnel d’un établissement public. [less ▲]Detailed reference viewed: 121 (4 UL) Large degrees in scale-free inhomogeneous random graphsBhattacharjee, Chinmoy ; Schulte, Matthiasin Annals of Applied Probability (in press)We consider a class of scale-free inhomogeneous random graphs, which includes some long-range percolation models. We study the maximum degree in such graphs in a growing observation window and show that ... [more ▼]We consider a class of scale-free inhomogeneous random graphs, which includes some long-range percolation models. We study the maximum degree in such graphs in a growing observation window and show that its limiting distribution is Frechet. We achieve this by proving convergence of the underlying point process of the degrees to a certain Poisson process. Estimating the index of the power-law tail for the typical degree distribution is an important question in statistics. We prove consistency of the Hill estimator for the inverse of the tail exponent of the typical degree distribution. [less ▲]Detailed reference viewed: 34 (1 UL) Asymptotic Analysis of Max-Min Weighted SINR for IRS-Assisted MISO Systems with Hardware ImpairmentsPapazafeiropoulo, Anastasios; Pan, Cunhua; Elbir, Ahmet et alin IEEE Wireless Communications Letters (in press)We focus on the realistic maximization of the up-link minimum-signal-to-interference-plus-noise ratio (SINR) of a general multiple-input-single-output (MISO) system assisted by an intelligent reflecting ... [more ▼]We focus on the realistic maximization of the up-link minimum-signal-to-interference-plus-noise ratio (SINR) of a general multiple-input-single-output (MISO) system assisted by an intelligent reflecting surface (IRS) in the large system limit accounting for HIs. In particular, we introduce the HIs at both the IRS (IRS-HIs) and the transceiver HIs (AT-HIs), usually neglected despite their inevitable impact. Specifically, the deterministic equivalent analysis enables the derivation of the asymptotic weighted maximum-minimum SINR with HIs by jointly optimizing the HIs-aware receiver, the transmit power, and the reflect beamforming matrix (RBM). Notably, we obtain the optimal power allocation and reflect beamforming matrix with low overhead instead of their frequent necessary computation in conventional MIMO systems based on the instantaneous channel information. Monte Carlo simulations verify the analytical results which show the insightful interplay among the key parameters and the degradation of the performance due to HIs. [less ▲]Detailed reference viewed: 64 (8 UL) Reducibility of n-ary semigroups: from quasitriviality towards idempotencyCouceiro, Miguel; Devillet, Jimmy ; Marichal, Jean-Luc et alin Beiträge zur Algebra und Geometrie (in press)Let $X$ be a nonempty set. Denote by $\mathcal{F}^n_k$ the class of associative operations $F\colon X^n\to X$ satisfying the condition $F(x_1,\ldots,x_n)\in\{x_1,\ldots,x_n\}$ whenever at least $k$ of the ... [more ▼]Let $X$ be a nonempty set. Denote by $\mathcal{F}^n_k$ the class of associative operations $F\colon X^n\to X$ satisfying the condition $F(x_1,\ldots,x_n)\in\{x_1,\ldots,x_n\}$ whenever at least $k$ of the elements $x_1,\ldots,x_n$ are equal to each other. The elements of $\mathcal{F}^n_1$ are said to be quasitrivial and those of $\mathcal{F}^n_n$ are said to be idempotent. We show that $\mathcal{F}^n_1=\cdots =\mathcal{F}^n_{n-2}\subseteq\mathcal{F}^n_{n-1}\subseteq\mathcal{F}^n_n$ and we give conditions on the set $X$ for the last inclusions to be strict. The class $\mathcal{F}^n_1$ was recently characterized by Couceiro and Devillet \cite{CouDev}, who showed that its elements are reducible to binary associative operations. However, some elements of $\mathcal{F}^n_n$ are not reducible. In this paper, we characterize the class $\mathcal{F}^n_{n-1}\setminus\mathcal{F}^n_1$ and show that its elements are reducible. We give a full description of the corresponding reductions and show how each of them is built from a quasitrivial semigroup and an Abelian group whose exponent divides $n-1$. [less ▲]Detailed reference viewed: 138 (19 UL) Expediting in Two-Echelon Spare Parts Inventory SystemsDrent, Melvin ; Arts, Joachim in Manufacturing and Service Operations Management (in press)We consider a two-echelon spare parts inventory system consisting of one central warehouse and multiple local warehouses. Each warehouse keeps multiple types of repairable parts to maintain several types ... [more ▼]We consider a two-echelon spare parts inventory system consisting of one central warehouse and multiple local warehouses. Each warehouse keeps multiple types of repairable parts to maintain several types of capital goods. The local warehouses face Poisson demand and are replenished by the central warehouse. We assume that unsatisfied demand is backordered at all warehouses. Furthermore, we assume deterministic lead times for the replenishments of the local warehouses. The repair shop at the central warehouse has two repair options for each repairable part: a regular repair option and an expedited repair option. Both repair options have stochastic lead times. Irrespective of the repair option, each repairable part uses a certain resource for its repair. Assuming a dual-index policy at the central warehouse and base stock control at the local warehouses, an exact and efficient evaluation procedure for a given control policy is formulated. To find an optimal control policy, we look at the minimization of total investment costs under constraints on both the aggregate mean number of backorders per capital good type and the aggregate mean fraction of repairs that are expedited per repair resource. For this non-linear non-convex integer programming problem, we develop a greedy heuristic and an algorithm based on decomposition and column generation. Both solution approaches perform very well with average optimality gaps of 1.56 and 0.23 percent, respectively, across a large test bed of industrial size. Based on a case study at Netherlands Railways, we show how managers can significantly reduce the investment in repairable spare parts when dynamic repair policies are leveraged to prioritize repair of parts whose inventory is critically low. [less ▲]Detailed reference viewed: 613 (122 UL) The Politics of Church Land Administration: the Case of the Orthodox Patriarchate of Jerusalem in Ottoman and Mandatory PalestinePapastathis, Konstantinos ; Kark, Ruthin Byzantine and Modern Greek Studies (in press)Detailed reference viewed: 90 (1 UL) Bending laminations on convex hulls of anti-de Sitter quasicirclesmerlin, louis; Schlenker, Jean-Marc in Proceedings of the London Mathematical Society (in press)Let λ− and λ+ be two bounded measured laminations on the hyperbolic disk H2, which "strongly fill" (definition below). We consider the left earthquakes along λ− and λ+, considered as maps from the ... [more ▼]Let λ− and λ+ be two bounded measured laminations on the hyperbolic disk H2, which "strongly fill" (definition below). We consider the left earthquakes along λ− and λ+, considered as maps from the universal Teichmüller space T to itself, and we prove that the composition of those left earthquakes has a fixed point. The proof uses anti-de Sitter geometry. Given a quasi-symmetric homeomorphism u:RP1→RP1, the boundary of the convex hull in AdS3 of its graph in RP1×RP1≃∂AdS3 is the disjoint union of two embedded copies of the hyperbolic plane, pleated along measured geodesic laminations. Our main result is that any pair of bounded measured laminations that "strongly fill" can be obtained in this manner. [less ▲]Detailed reference viewed: 74 (1 UL) The quizzing effect depends on hope of success and can be optimized by cognitive load-based adaptationHeitmann, Svenja; Grund, Axel ; Fries, Stefan et alin Learning and Instruction (in press)It is well established that quizzing fosters learning. However, some gaps in the literature relating to the fit of quizzing to learner characteristics and learner perceptions during quizzing still need to ... [more ▼]It is well established that quizzing fosters learning. However, some gaps in the literature relating to the fit of quizzing to learner characteristics and learner perceptions during quizzing still need to be addressed. The present study focuses on two of these aspects: achievement motives and perceptions of cognitive load. First, quizzing entails that learners’ performance is judged against some standard of excellence. This might make it appealing and effective for learners with high hope of success and low fear of failure in particular. Second, it is an open question whether providing quiz questions that are adapted to learners’ perceived level of cognitive load during quizzing would be beneficial. To address these questions, we randomly assigned learners to either non-adaptive quizzing, adaptive quizzing, or note-taking. We found that quizzing benefits concerning learning outcomes were moderated by hope of success. Furthermore, the adaptation via cognitive load ratings substantially increased the quizzing effect. [less ▲]Detailed reference viewed: 28 (0 UL) Structural changes in the labor market and the rise of early retirement in France and GermanyBatyra, Anna; de la Croix, David; Pierrard, Olivier et alin German Economic Review (in press)The rise of early retirement in Europe is typically attributed to the European system of taxes and transfers. A model with an imperfectly competitive labor market allows us to consider also the effects of ... [more ▼]The rise of early retirement in Europe is typically attributed to the European system of taxes and transfers. A model with an imperfectly competitive labor market allows us to consider also the effects of bargaining power and of matching efficiency on pre-retirement. We find that lower bargaining power of workers and declining matching efficiency have been important determinants of early retirement in France and Germany. These structural changes, combined with early-retirement transfers and population aging, are also consistent with the employment and unemployment rates, labor share and seniority premia. [less ▲]Detailed reference viewed: 145 (9 UL) Ordre constitutionnel et intégration économique Réflexions sur les incidences constitutionnelles de l’approfondissement de l’UEM.Rassafi-Guibal, Hicham in Politeia (in press)Detailed reference viewed: 59 (1 UL) De quoi les Conseils nationaux de la productivité sont-ils le nom ? Contribution à la réflexion sur le sens de la gouvernance économique européenne et ses effets sur l’administration nationaleRassafi-Guibal, Hicham in Europe (in press)Detailed reference viewed: 59 (1 UL) Enlarging the frame: Issues of inclusion and mental health in an ageing societyFerring, Dieter in Journal of Mental Health Research in Intellectual Disabilities (in press)This contribution frames the notions of inclusion and mental health by describing trends in European societies at the social and economic level that will have direct consequences for a participative civil ... [more ▼]This contribution frames the notions of inclusion and mental health by describing trends in European societies at the social and economic level that will have direct consequences for a participative civil society and social cohesion. Starting point is the observation that the world faces challenges at the start of the 21st century that are new and unprecedented in its history. The four global forces that break all the trends known so far in human history include urbanization, accelerating technological development, greater global connections, and population ageing. The authors first describe the scale of population ageing, as ageing populations characterize several developed economies. In a second step, they highlight some consequences of population ageing for social welfare and in a third part they elaborate on the notion of justice and inclusion in rapidly changing societies. [less ▲]Detailed reference viewed: 70 (16 UL) The capital market impact of Blackrock’s thermal coal divestment announcementBassen, Alexander; Kaspereit, Thomas ; Buchholz, Daniel in Finance Research Letters (in press)This study examines how coal companies were affected by the announcement of thermal coal divestment made by Blackrock, a large institutional asset manager. Following the announcement, the largest thermal ... [more ▼]This study examines how coal companies were affected by the announcement of thermal coal divestment made by Blackrock, a large institutional asset manager. Following the announcement, the largest thermal coal mining companies exhibited negative abnormal returns. However, the stock prices of other firms were not affected. Blackrock’s own share price increased following the announcement. We provide additional evidence that Blackrock protected its clients by lowering its exposure towards affected companies before the announcement. Overall, our results show that divestment has significant impacts on the companies in question and that the capital market sees divestment as value-enhancing for the divesting institution. [less ▲]Detailed reference viewed: 72 (2 UL) Noradrenergic activation induced by yohimbine decreases interoceptive accuracy in healthy individuals with childhood adversitySchulz, André ; Deuter, Christian E.; Breden, Ion-Hideo et alin Development and Psychopathology (in press)Acute stress affects interoception, but it remains unclear if this is due to activation of the sympatho-adreno-medullary (SAM) or hypothalamicpituitary-adrenocortical axis. This study aimed to investigate ... [more ▼]Acute stress affects interoception, but it remains unclear if this is due to activation of the sympatho-adreno-medullary (SAM) or hypothalamicpituitary-adrenocortical axis. This study aimed to investigate the effect of SAM axis activation on interoceptive accuracy (IAcc). Central alpha2-adrenergic receptors represent a negative feedback mechanism of the SAM axis. Major depressive disorder and adverse childhood experiences (ACE) are associated with alterations in the biological stress systems, including central alpha2-adrenergic receptors. Here, healthy individuals with and without ACE as well as depressive patients with and without ACE (n=114; all without antidepressant medication) were tested after yohimbine (alpha2-adrenergic antagonist) and placebo. We assessed IAcc and sensibility in a heartbeat counting task. Increases in systolic and diastolic blood pressure after yohimbine confirmed successful SAM axis activation. IAcc decreased after yohimbine only in the healthy group with ACE, but remained unchanged in all other groups (‘group’ × ‘drug’ interaction). This effect may be due to selective up-regulation of alpha2-adrenergic receptors after childhood trauma, which reduces capacity for attention focus on heartbeats. The sympathetic neural pathway including alpha2-adrenergic circuitries may be essential for mediating interoceptive signal transmission. Suppressed processing of physical sensations in stressful situations may represent an adaptive response in healthy individuals who experienced ACE. [less ▲]Detailed reference viewed: 85 (5 UL) Characterization of field homomorphisms through Pexiderized functional equationsGselmann, Eszter; Kiss, Gergely ; Vincze, Csabain Journal of Difference Equations and Applications (in press)Detailed reference viewed: 81 (6 UL) The fourth moment theorem on the Poisson spaceDöbler, Christian ; Peccati, Giovanni in Annals of Probability (in press)Detailed reference viewed: 390 (30 UL) A Meta-Analysis of Viewing Time Measures of Sexual Interest in ChildrenSchmidt, Alexander F. ; Babchishin, Kelly M.; Lehmann, Robert J. B.in Archives of Sexual Behavior (in press)Due to unobtrusiveness and ease of implementation, viewing time (VT) measures of sexual interest in children have sparked increasing research interest in forensic contexts over the last two decades. The ... [more ▼]Due to unobtrusiveness and ease of implementation, viewing time (VT) measures of sexual interest in children have sparked increasing research interest in forensic contexts over the last two decades. The current study presents two meta-analyses of VT measures adapted to assess pedophilic interest to determine their discrimination between sexual offenders against children (SOC) and non-SOC groups as well as convergent validity (associations with other measures of sexual interest in children). On average, VT measures showed moderate discrimination between criterion groups (fixed-effect d = 0.60, 95% CI [0.51, 0.68], N = 2,705, k = 14) and significant convergent validity with self-reports, penile plethysmography, Implicit Association Tests and offence behavioral measures ranging from r =.18 to r = .38. VT measures, however, provided better discrimination for adults (fixed-effect d = 0.78, 95% CI [0.64, 0.92]) than adolescent samples (fixed-effect d = 0.50, 95% CI [0.40, 0.61]), Qbetween = 9.37, p = .002. Moreover, using pedophilic difference scores within adult samples substantially increased VT measures’ validity (fixed-effect d = 1.03, 95% CI [0.82, 1.25], N = 414, k = 7). Results are discussed in terms of their theoretical and applied implications for forensic contexts. [less ▲]Detailed reference viewed: 167 (2 UL) Do banks and microfinance institutions compete? Microevidence from MadagascarLeon, Florian ; Baraton, Pierrickin Economic Development and Cultural Change (in press)This paper examines whether the loan strategy of a microfinance institution is shaped by the entry of a bank. Specifically, we investigate whether the distance between a borrower of a microfinance ... [more ▼]This paper examines whether the loan strategy of a microfinance institution is shaped by the entry of a bank. Specifically, we investigate whether the distance between a borrower of a microfinance institution and the closest bank influences loan conditions provided by the microfinance institution. We use an original panel dataset of 32,374 loans granted to 14,834 borrowers provided by one of the largest microfinance institutions in Madagascar between 2008 and 2014. We find that the closer a bank is located to a given MFI borrower, the larger the loan obtained and the less collateral required. We also find that the effect is stronger for clients that could be more easily caught by banks (i.e., large firms and clients without a previous relationship with the MFI). [less ▲]Detailed reference viewed: 106 (1 UL) On the Cohomological Crepant Resolution Conjecture for the complexified Bianchi orbifoldsPerroni, Fabio; Rahm, Alexander in Algebraic and Geometric Topology (in press)We give formulae for the Chen--Ruan orbifold cohomology for the orbifolds given by a Bianchi group acting on complex hyperbolic 3-space. The Bianchi groups are the arithmetic groups PSL_2(A), where A is ... [more ▼]We give formulae for the Chen--Ruan orbifold cohomology for the orbifolds given by a Bianchi group acting on complex hyperbolic 3-space. The Bianchi groups are the arithmetic groups PSL_2(A), where A is the ring of integers in an imaginary quadratic number field. The underlying real orbifolds which help us in our study, given by the action of a Bianchi group on real hyperbolic 3-space (which is a model for its classifying space for proper actions), have applications in physics. We then prove that, for any such orbifold, its Chen-Ruan orbifold cohomology ring is isomorphic to the usual cohomology ring of any crepant resolution of its coarse moduli space. By vanishing of the quantum corrections, we show that this result fits in with Ruan's Cohomological Crepant Resolution Conjecture. [less ▲]Detailed reference viewed: 121 (6 UL) Concentration bounds for geometric Poisson functionals: logarithmic Sobolev inequalities revisitedPeccati, Giovanni ; Bachmann, Saschain Electronic Journal of Probability (in press)Detailed reference viewed: 197 (16 UL) La technologie blockchain – et les tendances de la décorporéisation en droit et cultureBecker, Katrin in Pistes. Revue de philosophie contemporaine. Éthique, politique, philosophie des techniques (in press), 1Detailed reference viewed: 64 (2 UL) Gene selection for optimal prediction of cell position in tissues from single-cell transcriptomicsTanevski, Jovan; Nguyen, Thin; Truong, Buu et alin Life Science Alliance (in press)Single-cell RNA-seq (scRNAseq) technologies are rapidly evolving. While very informative, in standard scRNAseq experiments the spatial organization of the cells in the tissue of origin is lost. Conversely ... [more ▼]Single-cell RNA-seq (scRNAseq) technologies are rapidly evolving. While very informative, in standard scRNAseq experiments the spatial organization of the cells in the tissue of origin is lost. Conversely, spatial RNA-seq technologies designed to maintain cell localization have limited throughput and gene coverage. Mapping scRNAseq to genes with spatial information increases coverage while providing spatial location. However, methods to perform such mapping have not yet been benchmarked. To fill this gap, we organized the DREAM Single-Cell Transcriptomics challenge focused on the spatial reconstruction of cells from the Drosophila embryo from scRNAseq data, leveraging as silver standard, genes with in situ hybridization data from the Berkeley Drosophila Transcription Network Project reference atlas. The 34 participating teams used diverse algorithms for gene selection and location prediction, while being able to correctly localize clusters of cells. Selection of predictor genes was essential for this task. Predictor genes showed a relatively high expression entropy, high spatial clustering and included prominent developmental genes such as gap and pair-rule genes and tissue markers. Application of the Top-10 methods to a zebrafish embryo dataset yielded similar performance and statistical properties of the selected genes than in the Drosophila data. This suggests that methods developed in this challenge are able to extract generalizable properties of genes that are useful to accurately reconstruct the spatial arrangement of cells in tissues. [less ▲]Detailed reference viewed: 161 (4 UL) Permanent investment courts and the EU legal orderNeframi, Eleftheria in European Yearbook of International Economic Law (in press)In the external action of the Union, the establishment of permanent investment courts is not only part of the common commercial policy, but also an expression of the objective to promote the rule of law ... [more ▼]In the external action of the Union, the establishment of permanent investment courts is not only part of the common commercial policy, but also an expression of the objective to promote the rule of law and to act as an influential actor in international procedural law. Through its participation in agreements establishing a bilateral investment court system (ICS) and in the negotiation of the convention establishing a Multilateral Investment Court (MIC), the Union aims to promote its own standards of judicial protection while preserving the constitutional framework at the basis of the principle of autonomy. The present paper deals with the question of division of competences, especially in the context of the establishment of a MIC and in the allocation of international responsibility in Investor-State Dispute Settlement (ISDS) mechanisms. Moreover, it discusses the scope of fundamental principles of the EU legal order through the position of the Court of Justice in Opinion 1/17 and the analysis of the compatibility of the ICS with primary EU law. While the principles of conferral and of the autonomy of the EU legal order impose constraints to the external action of the Union, their scope is at the same time interpreted in a way to accommodate their guarantee with the EU’s objective to contribute to the major reform of the ISDS. In that way, the guarantee of the EU legal order’s constitutional requirements is not necessarily a limit to the efficiency of the Union’s external action [less ▲]Detailed reference viewed: 514 (39 UL) Family income and material deprivation: do they matter for sleep quality and quantity in early life? Evidence from a longitudinal study.Barazzetta, Marta ; Ghislandi, Simonein Sleep (in press)Study Objectives: The aim of the present paper is to investigate the determinants of sleeping patterns in children up to age 9 on a large and geographically homogeneous sample of British children and ... [more ▼]Study Objectives: The aim of the present paper is to investigate the determinants of sleeping patterns in children up to age 9 on a large and geographically homogeneous sample of British children and parents, focusing in particular on the role of economic and social factors, specifically on income. Methods: The data of this study come from the Avon Longitudinal Study of Parents and Children, a long-term health research project that recruited over 14,000 pregnant women who were due to give birth between April 1991 and December 1992 in Bristol and its surrounding areas, including some of Somerset and Gloucestershire. Logistic regression models for the sleep problems dummies and log-linear models for the sleep quantity. Results: One additional item in the material deprivation index is associated to an increase of around 10% to 20% in the odds of having at least one sleep problem. Similarly, children from the richest families are less likely to have any sleep problem up to 115 months (around 20% reduction in the odds). Mother’s characteristics (i.e. education and mental health in the pregnancy period) are also significant predictors. Sleep quantity does not vary much and is not sensitive to socioeconomic factors. Conclusion: Exposure to income-related inequalities affects child sleep. Further research is needed in order to understand if sleep in early life influence future health and economic trajectories. [less ▲]Detailed reference viewed: 140 (3 UL) The Dark Side of Digital Financial Transformation: The New Risks of FinTech and the Rise of TechRiskZetzsche, Dirk Andreas ; Arner, Douglas; Buckley, Rossin Singapore Journal of Legal Studies (in press)Detailed reference viewed: 170 (14 UL) The induced metric on the boundary of the convex hull of a quasicircle in hyperbolic and anti de Sitter geometryBonsante, Francesco; Danciger, Jeff; Maloni, Sara et alin Geometry and Topology (in press)Celebrated work of Alexandrov and Pogorelov determines exactly which metrics on the sphere are induced on the boundary of a compact convex subset of hyperbolic three-space. As a step toward a ... [more ▼]Celebrated work of Alexandrov and Pogorelov determines exactly which metrics on the sphere are induced on the boundary of a compact convex subset of hyperbolic three-space. As a step toward a generalization for unbounded convex subsets, we consider convex regions of hyperbolic three-space bounded by two properly embedded disks which meet at infinity along a Jordan curve in the ideal boundary. In this setting, it is natural to augment the notion of induced metric on the boundary of the convex set to include a gluing map at infinity which records how the asymptotic geometry of the two surfaces compares near points of the limiting Jordan curve. Restricting further to the case in which the induced metrics on the two bounding surfaces have constant curvature Kâˆˆ[âˆ’1,0) and the Jordan curve at infinity is a quasicircle, the gluing map is naturally a quasisymmetric homeomorphism of the circle. The main result is that for each value of K, every quasisymmetric map is achieved as the gluing map at infinity along some quasicircle. We also prove analogous results in the setting of three-dimensional anti de Sitter geometry. Our results may be viewed as universal versions of the conjectures of Thurston and Mess about prescribing the induced metric on the boundary of the convex core of quasifuchsian hyperbolic manifolds and globally hyperbolic anti de Sitter spacetimes. [less ▲]Detailed reference viewed: 69 (3 UL) Corruption and tax compliance: evidence from small retailers in Bamako, MaliBertinelli, Luisito ; Bourgain, Arnaud ; Leon, Florian in Applied Economics Letters (in press)We investigate the impact of corruption on tax compliance using a sample of 700 small business in Bamako, Mali. The main contribution of this paper is to focus on micro-enterprises (including semi-formal ... [more ▼]We investigate the impact of corruption on tax compliance using a sample of 700 small business in Bamako, Mali. The main contribution of this paper is to focus on micro-enterprises (including semi-formal and informal ones), while existing works concentrate on large and formal firms. Our results show that (i) even very small firms pay taxes (two-thirds of firms pay taxes in our sample); and, (ii) paying bribes reduces significantly tax compliance. This latter finding is robust (i) to the addition of a set of control variables accounting for other determinants, (ii) to treatment for endogeneity, and (iii) the use of a different proxy for tax compliance. [less ▲]Detailed reference viewed: 147 (3 UL) Security of Distance−Bounding: A SurveyGildas, Avoine; Muhammed, Ali Bingöl; Ioana, Boureanu et alin ACM Computing Surveys (in press)Distance bounding protocols allow a verifier to both authenticate a prover and evaluate whether the latter is located in his vicinity. These protocols are of particular interest in contactless systems, e ... [more ▼]Distance bounding protocols allow a verifier to both authenticate a prover and evaluate whether the latter is located in his vicinity. These protocols are of particular interest in contactless systems, e.g. electronic payment or access control systems, which are vulnerable to distance-based frauds. This survey analyzes and compares in a unified manner many existing distance bounding protocols with respect to several key security and complexity features. [less ▲]Detailed reference viewed: 137 (5 UL) Spelling patterns of plural marking and learning trajectories in French taught as a foreign languageWeth, Constanze ; Ugen, Sonja ; Fayol, Michel et alin Written Language and Literacy (in press), 24Although French plural spelling has been studied extensively, the complexity of factors affecting the learning of French plural spelling are not yet fully explained, namely on the level of adjectival and ... [more ▼]Although French plural spelling has been studied extensively, the complexity of factors affecting the learning of French plural spelling are not yet fully explained, namely on the level of adjectival and verbal plural. This study investigates spelling profiles of French plural markers of 228 multilingual grade 5 pupils with French taught as a foreign language. Three analyses on the learner performances of plural spelling in nouns, verbs and pre- and postnominal attributive adjectives were conducted (1) to detect the pupils’ spelling profiles of plural marking on the basis of the performances in the pretest, (2) to test the profiles against two psycholinguistic theories, and (3) to evaluate the impact of the training on each spelling profile in the posttest. The first analysis confirms the existing literature that pupils’ learning of French plural is not random but ordered and emphasizes the role of the position for adjectives (pre- or postnominal) on correct plural spelling. The second analysis reveals the theoretical difficulties of predicting spelling of adjectival and verbal plural. The third analysis shows that strong and poor spellers both benefit from a morphosyntactic training and provides transparency and traceability of the learning trajectories. Together, the descriptive analyses reveal clear patterns of intra-individual spelling profiles. They point to a need for further research in those areas that have empirically provided the most inconsistent results to date and that are not supported by the theories: verbs and adjectives. [less ▲]Detailed reference viewed: 43 (5 UL) A look into the future of the COVID-19 pandemic in Europe: an expert consultationIftekhar, E. N.; Priesemann, V.; Balling, Rudolf et alin The Lancet Regional Health Europe (in press)How will the coronavirus disease 2019 (COVID-19) pandemic develop in the coming months and years? Based on an expert survey, we examine key aspects that are likely to influence the COVID-19 pandemic in ... [more ▼]How will the coronavirus disease 2019 (COVID-19) pandemic develop in the coming months and years? Based on an expert survey, we examine key aspects that are likely to influence the COVID-19 pandemic in Europe. The challenges and developments will strongly depend on the progress of national and global vaccination programs, the emergence and spread of variants of concern (VOCs), and public responses to non-pharmaceutical interventions (NPIs). In the short term, many people remain unvaccinated, VOCs continue to emerge and spread, and mobility and population mixing are expected to increase. Therefore, lifting restrictions too much and too early risk another damaging wave. This challenge remains despite the reduced opportunities for transmission given vaccination progress and reduced indoor mixing in summer 2021. In autumn 2021, increased indoor activity might accelerate the spread again, whilst a necessary reintroduction of NPIs might be too slow. The incidence may strongly rise again, possibly filling intensive care units, if vaccination levels are not high enough. A moderate, adaptive level of NPIs will thus remain necessary. These epidemiological aspects combined with economic, social, and health-related consequences provide a more holistic perspective on the future of the COVID-19 pandemic. [less ▲]Detailed reference viewed: 89 (1 UL) Book review: Bessey, Valérie et Werner Paravicini: Guerre des manifestes : Charles le Téméraire et ses ennemis (1465-1475)Genot, Gilles in Hemecht: Zeitschrift für Luxemburger Geschichte (in press)Detailed reference viewed: 56 (4 UL) High-performance modeling of concrete ageingHabera, Michal ; Zilian, Andreas in Proceedings in Applied Mathematics and Mechanics (in press)Long-term behaviour of concrete structural elements is very important for evaluation of its health and serviceability range. The phenomena that must be considered are complex and lead to coupled ... [more ▼]Long-term behaviour of concrete structural elements is very important for evaluation of its health and serviceability range. The phenomena that must be considered are complex and lead to coupled multiphysics formulations. Such formulations are difficult not only from physical perspective, but also from computational perspective. In this contribution attention to computational efficiency and effective implementation is payed. Presented model for concrete ageing is based on microprestress-solidification (MPS) theory of Bazant [1], Kunzel’s model for heat and moisture transport [2] and Mazars model for damage [3]. Ageing linear viscoelastic response, which is immanent to MPS theory and concrete creep, leads to ordinary differetial equation for internal variables solved for every quadrature/nodal point. Numerical structure of the finite element discretisation is examined. Few simplifications on physical model lead to a very efficient linear algebra problem for which standard preconditioned Krylov solvers are reviewed. In parallel, weak and strong scaling tests are performed. All results are produced within open-source finite element framework FEniCS [4]. These models are usually a basis for more involved thermo-hygro-chemo-mechanical (THCM) models with migrating chemical species. It is anticipated, that presented results will help practitioners or other structural engineerers with the choice of suitable and efficient methods for long-term concrete modeling. [less ▲]Detailed reference viewed: 204 (28 UL) Case study on augmented reality, digital and physical modelling with mathematical learning disabilities students in an elementary school in LuxemburgHaas, Ben; Kreis, Yves ; Lavicza, Zsoltin International Journal for Technology in Mathematics Education (in press), 28(3), This paper reports on a case study of two elementary school students with mathematical learning disabilities (MLD) (ages 10 and 11) using augmented reality (AR), digital and physical modelling in ... [more ▼]This paper reports on a case study of two elementary school students with mathematical learning disabilities (MLD) (ages 10 and 11) using augmented reality (AR), digital and physical modelling in mathematics class. MLD students worked on modelling geometric shapes (cubes, cuboids, squared pyramids, and octahedrons) and forms (polygons) by combining real-world objects with AR and creating a copy of geometric shapes or missing parts with a 3D printing device. The study focused on the development of process skills and mathematical concepts, tried to identify changes in the visual-spatial memory, and documented the learning behaviour in class. Further, we collected data through task-based interviews with both students. Based on our findings, we present settings and manipulatives which are likely to foster process skills and mathematical concepts in geometry tasks suitable for MLD elementary school students. [less ▲]Detailed reference viewed: 48 (7 UL) Invariance in a class of operations related to weighted quasi-geometric meansDevillet, Jimmy ; Matkowski, Januszin Fuzzy Sets and Systems (in press)Let $I\subset (0,\infty )$ be an interval that is closed with respect to the multiplication. The operations $C_{f,g}\colon I^{2}\rightarrow I$ of the form \begin{equation*} C_{f,g}\left( x,y\right) =\left ... [more ▼]Let $I\subset (0,\infty )$ be an interval that is closed with respect to the multiplication. The operations $C_{f,g}\colon I^{2}\rightarrow I$ of the form \begin{equation*} C_{f,g}\left( x,y\right) =\left( f\circ g\right) ^{-1}\left( f\left( x\right) \cdot g\left( y\right) \right) \text{,} \end{equation*} where $f,g$ are bijections of $I$ are considered. Their connections with generalized weighted quasi-geometric means is presented. It is shown that invariance\ question within the class of this operations leads to means of iterative type and to a problem on a composite functional equation. An application of the invariance identity to determine effectively the limit of the sequence of iterates of some generalized quasi-geometric mean-type mapping, and the form of all continuous functions which are invariant with respect to this mapping are given. The equality of two considered operations is also discussed. [less ▲]Detailed reference viewed: 72 (5 UL) Nitsche’s method for two and three dimensional NURBS patch couplingNguyen, Vinh-Phu; Kerfriden, Pierre; Brino, Marco et alin Computational Mechanics (in press)We present a Nitche’s method to couple non-conforming two and three-dimensional NURBS (Non Uniform Rational B-splines) patches in the context of isogeometric analysis (IGA). We present results for linear ... [more ▼]We present a Nitche’s method to couple non-conforming two and three-dimensional NURBS (Non Uniform Rational B-splines) patches in the context of isogeometric analysis (IGA). We present results for linear elastostatics in two and and three-dimensions. The method can deal with surface-surface or volume-volume coupling, and we show how it can be used to handle heterogeneities such as inclusions. We also present preliminary results on modal analysis. This simple coupling method has the potential to increase the applicability of NURBS-based isogeometric analysis for practical applications. [less ▲]Detailed reference viewed: 1028 (70 UL) Students' immigration background as a moderator of predictive validity of tracking decisions.Klapproth, Florian ; Schaltz, Paule in Procedia Social and Behavioral Sciences (in press)Detailed reference viewed: 160 (20 UL) Teachers’ assessments of students’ achievements: The ecological validity of studies using case vignettesKrolak-Schwerdt, Sabine ; Hörstermann, Thomas ; Glock, Sabine et alin Journal of Experimental Education (in press)Detailed reference viewed: 172 (10 UL) Attitudes towards Multiculturalism in Luxembourg: Measurement Invariance and Factor Structure of the Multicultural Ideology ScaleStogianni, Maria ; Murdock, Elke ; He, Jia et alin International Journal of Intercultural Relations (in press)In the present study, we examined the dimensionality and the measurement invariance of the Multicultural Ideology Scale (MCI), and mean differences across different cultural groups within the multilingual ... [more ▼]In the present study, we examined the dimensionality and the measurement invariance of the Multicultural Ideology Scale (MCI), and mean differences across different cultural groups within the multilingual, multicultural context of Luxembourg. Luxembourg is a unique context to study attitudes towards diversity because 47.4% of the citizens are non-nationals (i.e. economic migrants, sojourners, refugees) and minority and majority are increasingly difficult to define. Our sample included 1,488 participants from diverse ethnic backgrounds who completed the survey in German, French or English. In contrast to previous findings, our analyses on responses to the MCI scale produced a two-dimensional structure, distinguishing between positive and negative attitudes towards multiculturalism. The factor structure was partially invariant across ethnocultural groups: Configural and metric invariance were established across natives and non-natives and different language versions. Scalar invariance was only established across gender groups. Natives and male participants reported the most negative attitudes towards multiculturalism. We discuss the importance of assessing measurement invariance and provide recommendations to improve the assessment of psychological multiculturalism. [less ▲]Detailed reference viewed: 126 (20 UL) A remark on Schröder's equation: Formal and analytic linearization of iterative roots of the power series f(z)=zReich, Ludwig; Tomaschek, Jörg in Monatshefte für Mathematik (in press)We study Schröder’s equation (i.e. the problem of linearization) for local analytic functions F with F (0)=0, F(0)=1, F(0) a root of 1. While Schröder’s equation in this case need not have even a formal ... [more ▼]We study Schröder’s equation (i.e. the problem of linearization) for local analytic functions F with F (0)=0, F(0)=1, F(0) a root of 1. While Schröder’s equation in this case need not have even a formal solution, we show that if F is formally linearizable, then it can also be linearized by an invertible local analytic transformation. On the other hand, there exist also divergent series solutions of Schröder’s equation in this situation. We give some applications of our results to iterative functional equations, functional-differential equations and iteration groups. [less ▲]Detailed reference viewed: 111 (14 UL) Europeans and Americans in Korea, 1882-1910: A Bourgeois and Translocal CommunityDittrich, Klaus in Itinerario (in press), 39(3), This article deals with the European and American community in Korea between the conclusion of Korea’s first international treaties in the early 1880s and the country’s annexation by the Japanese Empire ... [more ▼]This article deals with the European and American community in Korea between the conclusion of Korea’s first international treaties in the early 1880s and the country’s annexation by the Japanese Empire in 1910. The article starts out by presenting an overview of the community. Concentrated in Seoul and Chemulp’o, the Anglo-Saxon element dominated a community made up of diplomats, foreign experts in the service of the Korean government, merchants and missionaries. Next, the article describes two key characteristics of the European and American residents in Korea. Firstly, they were individuals defining themselves as bourgeois, or middle-class; secondly, the term “translocality” serves to bring together the multiple layers of border-crossing these individuals were involved in – as long-distance migrants between Europe or Northern America and East Asia, as migrants within the East Asian context, and as representatives of different Euro-American nationalities living together in Korea. [less ▲]Detailed reference viewed: 152 (5 UL) A minimal realization technique for the dynamical structure function of a class of LTI systemsGoncalves, Jorge ; Yuan, Ye; Rai, Anurag et alin IEEE Transactions on Control of Network Systems (in press)Detailed reference viewed: 264 (12 UL) Smoking related warning messages formulated as questions positively influence short-term smoking behaviourMüller, Barbara; Ritter, Simone; Glock, Sabine et alin Journal of Health Psychology (in press)Detailed reference viewed: 173 (11 UL) Societal Emotional Environments and Cross-Cultural Differences in Life Satisfaction: A Forty-Nine Country StudyKrys, Kuba; Yeung, June; Capaldi, Colin et alin Journal of Positive Psychology (in press)In this paper, we introduce the concept of ‘societal emotional environment’: the emotional climate of a society (operationalized as the degree to which positive and negative emotions are expressed in a ... [more ▼]In this paper, we introduce the concept of ‘societal emotional environment’: the emotional climate of a society (operationalized as the degree to which positive and negative emotions are expressed in a society). Using data collected from 12,888 participants across 49 countries, we show how societal emotional environments vary across countries and cultural clusters, and we consider the potential importance of these differences for well-being. Multilevel analyses supported a ‘double-edged sword’ model of negative emotion expression, where expression of negative emotions predicted higher life satisfaction for the expresser but lower life satisfaction for society. In contrast, partial support was found for higher societal life satisfaction in positive societal emotional environments. Our study highlights the potential utility and importance of distinguishing between positive and negative emotion expression, and adopting both individual and societal perspectives in well-being research. Individual pathways to happiness may not necessarily promote the happiness of others. [less ▲]Detailed reference viewed: 312 (11 UL) A Polynomial Time Subsumption Algorithm for Nominal Safe $ELO_{\bot}$ under Rational ClosureCasini, Giovanni ; Straccia, Umberto; Meyer, Thomasin Information Sciences (in press)Description Logics (DLs) under Rational Closure (RC) is a well-known framework for non-monotonic reasoning in DLs. In this paper, we address the concept subsumption decision problem under RC for nominal ... [more ▼]Description Logics (DLs) under Rational Closure (RC) is a well-known framework for non-monotonic reasoning in DLs. In this paper, we address the concept subsumption decision problem under RC for nominal safe $ELO_{\bot}$, a notable and practically important DL representative of the OWL 2 profile OWL 2 EL. Our contribution here is to define a polynomial time subsumption procedure for nominal safe $ELO_{\bot}$ under RC that relies entirely on a series of classical, monotonic $EL_{\bot}$ subsumption tests. Therefore, any existing classical monotonic $EL_{\bot}$ reasoner can be used as a black box to implement our method. We then also adapt the method to one of the known extensions of RC for DLs, namely Defeasible Inheritance-based DLs without losing the computational tractability. [less ▲]Detailed reference viewed: 102 (13 UL) Supporting DNN Safety Analysis and Retraining through Heatmap-based Unsupervised LearningFahmy, Hazem ; Pastore, Fabrizio ; Bagherzadeh, Mojtaba et alin IEEE Transactions on Reliability (in press)Deep neural networks (DNNs) are increasingly im- portant in safety-critical systems, for example in their perception layer to analyze images. Unfortunately, there is a lack of methods to ensure the ... [more ▼]Deep neural networks (DNNs) are increasingly im- portant in safety-critical systems, for example in their perception layer to analyze images. Unfortunately, there is a lack of methods to ensure the functional safety of DNN-based components. We observe three major challenges with existing practices regarding DNNs in safety-critical systems: (1) scenarios that are underrepresented in the test set may lead to serious safety violation risks, but may, however, remain unnoticed; (2) char- acterizing such high-risk scenarios is critical for safety analysis; (3) retraining DNNs to address these risks is poorly supported when causes of violations are difficult to determine. To address these problems in the context of DNNs analyzing images, we propose HUDD, an approach that automatically supports the identification of root causes for DNN errors. HUDD identifies root causes by applying a clustering algorithm to heatmaps capturing the relevance of every DNN neuron on the DNN outcome. Also, HUDD retrains DNNs with images that are automatically selected based on their relatedness to the identified image clusters. We evaluated HUDD with DNNs from the automotive domain. HUDD was able to identify all the distinct root causes of DNN errors, thus supporting safety analysis. Also, our retraining approach has shown to be more effective at improving DNN accuracy than existing approaches. [less ▲]Detailed reference viewed: 78 (7 UL) A new synuclein-transgenic mouse model for early Parkinson's reveals molecular features of preclinical diseaseHendrickx, Diana M.; Garcia, Pierre; Ashrafi, Amer et alin Molecular Neurobiology (in press)Understanding Parkinson’s disease (PD) in particular in its earliest phases, is important for diagnosis and treatment. However, human brain samples are collected post- mortem, reflecting mainly end stage ... [more ▼]Understanding Parkinson’s disease (PD) in particular in its earliest phases, is important for diagnosis and treatment. However, human brain samples are collected post- mortem, reflecting mainly end stage disease. Because brain samples of mouse models can be collected at any stage of the disease process, they are useful to investigate PD progression. Here, we compare ventral midbrain transcriptomics profiles from α- synuclein transgenic mice with a progressive, early PD-like striatal neurodegeneration across different ages using pathway, gene set and network analysis methods. Our study uncovers statistically significant altered genes across ages and between genotypes with known, suspected, or unknown function in PD pathogenesis and key pathways associated with disease progression. Among those are genotype-dependent alterations associated with synaptic plasticity, neurotransmission, as well as mitochondria-related genes and dysregulation of lipid metabolism. Age-dependent changes were among others observed in neuronal and synaptic activity, calcium homeostasis, and membrane receptor signaling pathways, many of which linked to G- protein coupled receptors. Most importantly, most changes occurred before neurodegeneration was detected in this model, which points to a sequence of gene expression events that may be relevant for disease initiation and progression. It is tempting to speculate that molecular changes similar to those changes observed in our model happen in midbrain dopaminergic neurons before they start to degenerate. In other words, we believe we have uncovered molecular changes that accompany the progression from preclinical to early PD. [less ▲]Detailed reference viewed: 166 (4 UL) Joint Precoding and On-Board Beamforming for Multiple gateway Multibeam Satellite SystemsJoroughi, Vahid in Submitted to IEEE Journal on Selected topic in Communication (JSAC) (in press)This paper aims to design joint precoding and onboard beamforming of a multiple gateway multibeam satellite system, either in a hybrid space-ground mode, or in a totally on-board one. In such an ... [more ▼]This paper aims to design joint precoding and onboard beamforming of a multiple gateway multibeam satellite system, either in a hybrid space-ground mode, or in a totally on-board one. In such an architecture, with employing high throughput full frequency reuse pattern over both user and feeder links, each gateway serves a cluster of adjacent beams such that the adjacent clusters are served through a set of gateways that are located at different geographical areas. However, such a system brings in two challenges to overcome. First, the interference in both user and feeder links is the bottleneck of the whole system and applying interference mitigation techniques becomes necessary. Second, as the data demand increases, the ground and space segments should employ extensive bandwidth resources in the feeder link accordingly. This entails embedding an extra number of gateways aiming to support a fair balance between the increasing demand and the corresponding required feeder link resources. To solve these problems, this study investigates the impact of employing a joint multiple gateway architecture and on-board beamforming scheme. It is shown that by properly designing the on-board beamforming scheme, the number of gateways can be kept affordable even if the data demand increases. Moreover, Zero Forcing (ZF) precoding techniques are considered to cope with the interference in both user and feeder links which embed in the following premises: (i) each gateway constructs a part of block ZF precoding matrix, (ii) the satellite and gateways perform the precoding scheme, and (iii) a joint design of ZF precoding and on-board beamforming at the payload of the satellite so that no signal processing scheme is conceived at the gateways. The provided simulation results depict the performance gain obtained by our proposed schemes. [less ▲]Detailed reference viewed: 275 (39 UL) The Gamma Stein equation and non-central de Jong theoremsDöbler, Christian ; Peccati, Giovanni in Bernoulli (in press)Detailed reference viewed: 238 (15 UL) University competition and transnational education: the choice of branch campusTampieri, Alessandro ; Poyago-Theotoky, Joannain B.E. Journal of Theoretical Economics (in press)Detailed reference viewed: 186 (8 UL) Applications of convex analysis within mathematicsAragón Artacho, Francisco Javier ; Borwein, J. M.; Martín-Márquez, V. et alin Mathematical Programming (in press)In this paper, we study convex analysis and its theoretical applications. We first apply important tools of convex analysis to Optimization and to Analysis. We then show various deep applications of ... [more ▼]In this paper, we study convex analysis and its theoretical applications. We first apply important tools of convex analysis to Optimization and to Analysis. We then show various deep applications of convex analysis and especially infimal convolution in Monotone Operator Theory. Among other things, we recapture the Minty surjectivity theorem in Hilbert space, and present a new proof of the sum theorem in reflexive spaces. More technically, we also discuss autoconjugate representers for maximally monotone operators. Finally, we consider various other applications in mathematical analysis. [less ▲]Detailed reference viewed: 227 (24 UL) Innovation Search Strategy and Predictable ReturnsFitzgerald, Tristan; Balsmeier, Benjamin ; Fleming, Lee et alin Management Science (in press)Detailed reference viewed: 225 (13 UL) Central Banks and Regulation of CryptocurrenciesNabilou, Hossein ; Prüm, André in Review of Banking & Financial Law (in press)This paper explores the interface between central banks and cryptocurrencies. Focusing on the European Central Bank (ECB), it identifies the potential threats that the rise of cryptocurrencies would pose ... [more ▼]This paper explores the interface between central banks and cryptocurrencies. Focusing on the European Central Bank (ECB), it identifies the potential threats that the rise of cryptocurrencies would pose to the basic and ancillary tasks of the ECB, in particular, its monetary policy operations and the exercise of its supervisory functions over credit institutions and payment systems. The paper finds that cryptocurrencies can potentially have both direct – through their potential impact on the price stability and monetary policy, and central banks’ monopoly over issuing base money – and indirect effects on central banks, mainly through the institutions and systems that fall under the ECB’s scope of competence. To address the challenges posed by cryptocurrencies, the ECB may take both legal (including supervisory and oversight) measures and non-legal (or technical) measures. With respect to technical measures, the ECB - to the extent falling within the scope of its competence - may focus on improving the efficiency of existing payment systems and addressing the existing frictions in market infrastructures to indirectly affect the cryptocurrency markets. Alternatively, it can venture into issuing Central Bank Digital Currency (CBDC). Regarding legal measures, central banks could envisage regulating cryptocurrencies either directly or indirectly. However, as the most significant potential impact of cryptocurrencies on central banks is likely to be indirect through the impact of cryptocurrencies on the banking and payment systems, and given the limitations on the ECB’s mandate and its regulatory and supervisory tools, it is apposite for the ECB to consider using indirect strategies and tools to influence cryptocurrency markets. This indirect approach can be implemented through the ECB’s existing supervisory and oversight powers over the banking and payment systems. This paper specifies the direct and indirect measures and assesses their merits in addressing the concerns about cryptocurrencies. [less ▲]Detailed reference viewed: 231 (11 UL) Im Schatten der Geschichte. Die (vergessene) Gewaltkommission der Bundesregierung zur Analyse und Prävention politisch motivierter Gewalt (1987 bis 1990)Eckert, Roland; Schumacher, Anette ; Willems, Helmut in Zeithistorische Forschungen (in press)Detailed reference viewed: 133 (64 UL) Interindividual differences in responses to global inequalityReese, Gerhard ; Proch, Jutta; Cohrs, J. Christopherin Analyses of Social Issues and Public Policy (in press)One of humanity’s most pressing problems is the inequality between people from “developed” and “developing” countries, which counteracts joint efforts to combat other large scale problems. Little is known ... [more ▼]One of humanity’s most pressing problems is the inequality between people from “developed” and “developing” countries, which counteracts joint efforts to combat other large scale problems. Little is known about the psychological antecedents that affect the perception of and behavioral responses to global inequality. Based on, and extending, Duckitt’s (2001) dual-process model, the current research examines psychological antecedents that may explain how people in an industrialized Western country respond to global inequality. In two studies (N1 = 116, N2 = 117), we analyzed the relationship between the Big Five and justice constructs, right-wing authoritarianism (RWA), social dominance orientation (SDO), and behavioral intentions to reduce global inequality. Two-group path analysis revealed support for the dual-process model in that RWA and SDO were important predictors of behavioral intentions and partially acted as mediators between personality and such intentions. Moreover, justice sensitivity explained variance beyond the “classic” DPM variables. In Study 2, we additionally assessed individuals’ global social identification and perceived injustice of global inequality that explained additional variance. Extending previous work on the dual-process model, these findings demonstrate that individual and group-based processes predict people’s responses to global inequality and uncover potentials to promote behavior in the interest of global justice. [less ▲]Detailed reference viewed: 98 (10 UL) Recent Results on Douglas–Rachford Methods for Combinatorial Optimization ProblemsAragón Artacho, Francisco Javier ; Borwein, J. M.; Tam, M. K.in Journal of Optimization Theory & Applications (in press)We discuss recent positive experiences applying convex feasibility algorithms of Douglas-Rachford type to highly combinatorial and far from convex problems.Detailed reference viewed: 144 (15 UL) En mots et en images : le corps à l’œuvre chez Annie ErnauxBarthelmebs-Raguin, Hélène in Sens Public (in press)Detailed reference viewed: 77 (6 UL) Arts vs Engineering: Choosing Consumption of and Investment in EducationTampieri, Alessandro ; Romano, Richardin Research in Economics (in press)Detailed reference viewed: 157 (4 UL) Pension Insecurity and Wellbeing in EuropeOlivera, Javier; Ponomarenko, Valentina in Journal of Social Policy (in press)This paper studies pension insecurity in a sample of non-retired individuals aged 50 years or older from 18 European countries. We capture pension insecurity with the subjective expectations on the ... [more ▼]This paper studies pension insecurity in a sample of non-retired individuals aged 50 years or older from 18 European countries. We capture pension insecurity with the subjective expectations on the probability that the government will reduce the pensions of the individual before retirement or will increase the statutory retirement age. We argue that changes in economic conditions and policy affect the formation of such probabilities, and through this, subjective wellbeing. In particular, we study the effects of pension insecurity on subjective wellbeing with pooled linear models, regressions per quintiles and instrumental variables. We find a statistically significant, stable and negative association between pension insecurity and subjective wellbeing. Our findings reveal that the individuals who are more affected by pension insecurity are those who are further away fromtheir retirement, have lower income, assess their life survival as low, have higher cognitive abilities and do not expect private pension payments. [less ▲]Detailed reference viewed: 149 (5 UL) How some bankers made a million by trading just two securities?Rinne, Kalle ; Suominen, Matti in Journal of Empirical Finance (in press)We study a pair trading strategy that utilizes short-term return reversals in the stock market. Using U.S. data, we show that returns to our pair trading strategy exceed reasonable estimates for ... [more ▼]We study a pair trading strategy that utilizes short-term return reversals in the stock market. Using U.S. data, we show that returns to our pair trading strategy exceed reasonable estimates for transaction costs. The strategy also generates positive alpha when controlling for the standard risk factors. Second, using transaction level data from Finland, focusing on a popular pair, we provide evidence that these kinds of pair trading returns are compensation from providing liquidity. On the days when the expected returns to our pair trading strategy are the highest, the trading volume is abnormally high and, judging from active brokers’ net trades, nearly 45% of all brokers (or their customers) engage in pair trading in accordance with our trading strategy. These brokers are mainly counterparties to few brokers that trade large quantities of stocks inconsistent with our strategy. [less ▲]Detailed reference viewed: 174 (20 UL) Safety-aware Location Privacy in VANET: Evaluation and ComparisonEmara, Karim Ahmed Awad El-Sayed in IEEE Transactions on Vehicular Technology (in press)VANET safety applications broadcast cooperative awareness messages (CAM) periodically to provide vehicles with continuous updates about the surrounding traffic. The periodicity and the spatiotemporal ... [more ▼]VANET safety applications broadcast cooperative awareness messages (CAM) periodically to provide vehicles with continuous updates about the surrounding traffic. The periodicity and the spatiotemporal information contained in these messages allow a global adversary to track vehicle movements. Many privacy schemes have been proposed for VANET, but only few schemes consider their impact on safety applications. Also, each scheme is evaluated using inconsistent metrics and unrealistic vehicle traces, which makes comparing the actual performance of different schemes in the wild more difficult. In this paper, we aim to fill this gap and compare different privacy schemes not only in terms of the privacy gained but also their impact on safety applications. A distortion-based privacy metric is initially proposed and compared with other popular privacy metrics showing its effectiveness in measuring privacy. A practical safety metric which is based on Monte Carlo analysis is then proposed to measure the QoS of two safety applications: forward collision warning and lane change warning. Using realistic vehicle traces, six state-of-the-art VANET privacy schemes are evaluated and compared in terms of the proposed privacy and safety metrics. Among the evaluated schemes, it was found that the coordinated silent period scheme achieves the best privacy and QoS levels but fully synchronized silence among all vehicles is a practical challenge. The CAPS and CADS schemes provide a practical compromise between privacy and safety since they employ only the necessary silence periods to prevent tracking and avoid changing pseudonyms in trivial situations. [less ▲]Detailed reference viewed: 217 (18 UL) Smart Bound Selection for the Verification of UML/OCL Class DiagramsClarisó, Robert; Gonzalez Perez, Carlos Alberto ; Cabot, Jordiin IEEE Transactions on Software Engineering (in press)Correctness of UML class diagrams annotated with OCL constraints can be checked using bounded verification techniques, e.g., SAT or constraint programming (CP) solvers. Bounded verification detects faults ... [more ▼]Correctness of UML class diagrams annotated with OCL constraints can be checked using bounded verification techniques, e.g., SAT or constraint programming (CP) solvers. Bounded verification detects faults efficiently but, on the other hand, the absence of faults does not guarantee a correct behavior outside the bounded domain. Hence, choosing suitable bounds is a non-trivial process as there is a trade-off between the verification time (faster for smaller domains) and the confidence in the result (better for larger domains). Unfortunately, bounded verification tools provide little support in the bound selection process. In this paper, we present a technique that can be used to (i) automatically infer verification bounds whenever possible, (ii) tighten a set of bounds proposed by the user and (iii) guide the user in the bound selection process. This approach may increase the usability of UML/OCL bounded verification tools and improve the efficiency of the verification process. [less ▲]Detailed reference viewed: 175 (31 UL) Environmental and Sustainability Education in the Benelux RegionVan Poeck, Katrien; Wals, Arjen E.J.; König, Ariane in Environmental Education Research (in press), (Special Issue), Detailed reference viewed: 147 (11 UL) Competition Numbers, Quasi-Line Graphs and HolesMcKay, Brendan; Schweitzer, Pascal; Schweitzer, Patrick in SIAM Journal on Discrete Mathematics (in press)The competition graph of an acyclic directed graph D is the undirected graph on the same vertex set as D in which two distinct vertices are adjacent if they have a common out-neighbor in D. The ... [more ▼]The competition graph of an acyclic directed graph D is the undirected graph on the same vertex set as D in which two distinct vertices are adjacent if they have a common out-neighbor in D. The competition number of an undirected graph G is the least number of isolated vertices that have to be added to G to make it the competition graph of an acyclic directed graph. We resolve two conjectures concerning competition graphs. First we prove a conjecture of Opsut by showing that the competition number of every quasi-line graph is at most 2. Recall that a quasi-line graph, also called a locally co-bipartite graph, is a graph for which the neighborhood of every vertex can be partitioned into at most two cliques. To prove this conjecture we devise an alternative characterization of quasi-line graphs to the one by Chudnovsky and Seymour. Second, we prove a conjecture of Kim by showing that the competition number of any graph is at most one greater than the number of holes in the graph. Our methods also allow us to prove a strengthened form of this conjecture recently proposed by Kim, Lee, Park and Sano, showing that the competition number of any graph is at most one greater than the dimension of the subspace of the cycle space spanned by the holes. [less ▲]Detailed reference viewed: 183 (7 UL) On-line model-based fault detection and isolation for PEM fuel cell stack systemsRosich, Albert ; Sarrate, Ramon; Nejjari, Fatihain Applied Mathematical Modelling (in press)Efficient and reliable operation of Polymer Electrolyte Membrane (PEM) fuel cells are key requirements for their successful commercialization and application. The use of diagnostic techniques enables the ... [more ▼]Efficient and reliable operation of Polymer Electrolyte Membrane (PEM) fuel cells are key requirements for their successful commercialization and application. The use of diagnostic techniques enables the achievement of these requirements. This paper focuses on model-based fault detection and isolation (FDI) for PEM fuel cell stack systems. The work consists in designing and selecting a subset of consistency relations such that a set of predefined faults can be detected and isolated. Despite a nonlinear model of the PEM fuel cell stack system will be used, consistency relations that are easily implemented by a variable back substitution method will be selected. The paper also shows the significance of structural models to solve diagnosis issues in complex systems. [less ▲]Detailed reference viewed: 297 (16 UL) Diversifizierung von Kindertagesbetreuungsangeboten durch mixed economy of care: Eine vergleichende Perspektive aus Luxemburg und Deutschland.Schmitz, Anett ; Wiltzius, Martine ; Mierendorff, Johannain Zeitschrift für Soziologie der Erziehung und Sozialisation = Journal for Sociology of Education and Socialization (in press)Detailed reference viewed: 53 (10 UL) A Generic Approach for Solving Nonlinear-Discrete Security-Constrained Optimal Power Flow Problems in Large-Scale SystemsPlatbrood, Ludovic; Capitanescu, Florin ; Merckx, Christian et alin IEEE Transactions on Power Systems (in press)This paper proves the practicality of an iterative algorithm for solving realistic large-scale SCOPF problems. This algorithm is based on the combination of a contingency filtering scheme, used to ... [more ▼]This paper proves the practicality of an iterative algorithm for solving realistic large-scale SCOPF problems. This algorithm is based on the combination of a contingency filtering scheme, used to identify the binding contingencies at the optimum, and a network compression method, used to reduce the complexity of the post-contingency models included in the SCOPF formulation. We show that by combining these two complementary ideas, it is possible to solve in a reasonable time SCOPF problems on large power system models with a large number of contingencies. Unlike most results reported for large-scale SCOPF problems, our algorithm uses a non-linear AC network model in both pre-contingency and post-contingency states, optimizes both active/reactive powers flows jointly, and treats the discrete variables. The proposed algorithm is implemented with state-of-the-art solvers and applied to two systems: a national grid with 2563 buses and 1297 contingencies, and a model of the European transmission network with 9241 buses and 12000 contingencies. [less ▲]Detailed reference viewed: 313 (16 UL) Regional foreign banks and financial inclusion: Evidence from AfricaLeon, Florian ; Zins, Alexandrain Economic Modelling (in press)Regional foreign banks expanded quickly over the past decade in developing and emerging countries and have a growing influence in banking systems. We question whether the development of African regional ... [more ▼]Regional foreign banks expanded quickly over the past decade in developing and emerging countries and have a growing influence in banking systems. We question whether the development of African regional foreign banks, also called Pan-African banks, influences financial inclusion of firms and households. To this end, we combine the World Bank Global Findex database and the World Bank Enterprise Surveys with a hand-collected database on the presence of regional foreign banks. We find that Pan-African banks presence increases firms’ access to credit and limited evidence that they favor financial access of the middle class by restoring confidence in banks. We suggest that this impact is related to the adoption of an aggressive strategy aiming at gaining market shares rather than through the exploitation of informational and technological advantages. [less ▲]Detailed reference viewed: 124 (3 UL) Health versus wealth: Saving lives or saving the economy during the COVID-19 pandemic?Lesschaeve, Christophe ; Glaurdic, Josip ; Mochtak, Michal in Public Opinion Quarterly (in press)Efforts to combat the COVID-19 crisis were characterized by a difficult trade-off: the stringency of the lockdowns decreased the spread of the virus, but amplified the damage to the economy. In this study ... [more ▼]Efforts to combat the COVID-19 crisis were characterized by a difficult trade-off: the stringency of the lockdowns decreased the spread of the virus, but amplified the damage to the economy. In this study, we analyze public attitudes toward this trade-off on the basis of a survey and survey-embedded experiment of more than seven thousand respondents from Southeast Europe, collected in April and May 2020. The results show that public opinion generally favored saving lives even at a steep economic cost. However, the willingness to trade lives for the economy was greater when the heterogeneous health and economic consequences of lockdown policies for the young and the elderly were emphasized. Free market views also make people more acceptant of higher casualties, as do fears that the instituted measures will lead to a permanent expansion of government control over society. [less ▲]Detailed reference viewed: 129 (11 UL) Fast cross-validation for multi-penalty ridge regressionvan de Wiel, Mark A.; van Nee, Mirrelijn M.; Rauschenberger, Armin in Journal of Computational and Graphical Statistics (in press)Prediction based on multiple high-dimensional data types needs to account for the potentially strong differences in predictive signal. Ridge regression is a simple, yet versatile and interpretable model ... [more ▼]Prediction based on multiple high-dimensional data types needs to account for the potentially strong differences in predictive signal. Ridge regression is a simple, yet versatile and interpretable model for high-dimensional data that has challenged the predictive performance of many more complex models and learners, in particular in dense settings. Moreover, it allows using a specific penalty per data type to account for differences between those. Then, the largest challenge for multi-penalty ridge is to optimize these penalties efficiently in a cross-validation (CV) setting, in particular for GLM and Cox ridge regression, which require an additional loop for fitting the model by iterative weighted least squares (IWLS). Our main contribution is a computationally very efficient formula for the multi-penalty, sample-weighted hat-matrix, as used in the IWLS algorithm. As a result, nearly all computations are in the low-dimensional sample space. We show that our approach is several orders of magnitude faster than more naive ones. We developed a very flexible framework that includes prediction of several types of response, allows for unpenalized covariates, can optimize several performance criteria and implements repeated CV. Moreover, extensions to pair data types and to allow a preferential order of data types are included and illustrated on several cancer genomics survival prediction problems. The corresponding R-package, multiridge, serves as a versatile standalone tool, but also as a fast benchmark for other more complex models and multi-view learners. [less ▲]Detailed reference viewed: 101 (32 UL) Finite-Time Attitude Synchronization with Distributed Discontinuous ProtocolsWei, Jieqiang; Zhang, Silun; Adaldo, Antonio et alin IEEE Transactions on Automatic Control (in press)The finite-time attitude synchronization problem is considered in this paper, where the rotation of each rigid body is expressed using the axis-angle representation. Two discontinuous and distributed ... [more ▼]The finite-time attitude synchronization problem is considered in this paper, where the rotation of each rigid body is expressed using the axis-angle representation. Two discontinuous and distributed controllers using the vectorized signum function are proposed, which guarantee almost global and local convergence, respectively. Filippov solutions and non-smooth analysis techniques are adopted to handle the discontinuities. Sufficient conditions are provided to guarantee finite-time convergence and boundedness of the solutions. Simulation examples are provided to verify the performances of the control protocols designed in this paper. [less ▲]Detailed reference viewed: 95 (1 UL) Towards an alternative to territorial jurisdiction to face criminality committed through or facilitated by the use of blockchainsJolly, Loren in Eurojus (in press)Detailed reference viewed: 88 (9 UL) Network Identifiability from Intrinsic NoiseGoncalves, Jorge ; Hayden, David; Yuan, Yein IEEE Transactions on Automatic Control (in press)Detailed reference viewed: 417 (30 UL) Can the Plight of the European Banking Structural Reforms be a Blessing in Disguise?Nabilou, Hossein in European Business Organization Law Review (in press)One of the problems perceived to be at the heart of the global financial crisis was an amalgamation of various commercial and investment banking activities under one entity, as well as the ... [more ▼]One of the problems perceived to be at the heart of the global financial crisis was an amalgamation of various commercial and investment banking activities under one entity, as well as the interconnectedness of the banking entities with other financial institutions, investment funds, and the shadow banking system. This paper focuses on various measures that aim to structurally separate the banking entities and their core functions from riskier financial activities such as (proprietary) trading or investments in alternative investment funds. Although banking structural reforms in the EU, UK, and the US have taken different forms, their common denominator is the separation of core banking functions from certain trading or securities market activities. Having reviewed the arguments for and against banking structural reforms and their varieties in major jurisdictions, including the EU, UK, US, France, and Germany, the paper argues that a more nuanced approach to introducing such measures at the EU level is warranted. Given the different market structures across the Atlantic and the lack of conclusive evidence on the beneficial impact of banking structural reforms, the paper concludes that the withdrawal of the banking structural reforms proposal by the European Commission has been a prudent move. It seems that in the absence of concrete evidence, experimenting with structural reforms at the Member-State level would be less costly and would provide for opportunities for learning from smaller mistakes that could pave the way for a more optimal approach to introducing banking structural reforms at the European level in the future. [less ▲]Detailed reference viewed: 104 (6 UL) On the comprehensibility and perceived privacy protection of indirect questioning techniquesHoffmann, Adrian; Waubert de Puiseau, Berenike; Schmidt, Alexander F. et alin Behavior Research Methods (in press)On surveys that assess sensitive personal attributes, indirect questioning aims at increasing respondents’ willingness to answer truthfully by protecting confidentiality. However, the assumption that ... [more ▼]On surveys that assess sensitive personal attributes, indirect questioning aims at increasing respondents’ willingness to answer truthfully by protecting confidentiality. However, the assumption that subjects understand questioning procedures fully and trust them to protect their privacy is tested rarely. In a scenario-based design, we compared four indirect questioning procedures in terms of comprehensibility and perceived privacy protection. All indirect questioning techniques were found less comprehensible for respondents than a conventional direct question used for comparison. Less-educated respondents experienced more difficulties when confronted with any indirect questioning technique. Regardless of education, the Crosswise Model was found most comprehensible among the four indirect methods. Indirect questioning was perceived to increase privacy protection in comparison to a direct question. Unexpectedly, comprehension and perceived privacy protection did not correlate. We recommend assessing these factors separately in future evaluations of indirect questioning. [less ▲]Detailed reference viewed: 153 (2 UL) Multiple Sets Exponential Concentration and Higher Order EigenvaluesGozlan, Nathael; Herry, Ronan in Potential Analysis (in press)On a generic metric measured space, we introduce a notion of improved concentration of measure that takes into account the parallel enlargement of k distinct sets. We show that the k-th eigenvalues of the ... [more ▼]On a generic metric measured space, we introduce a notion of improved concentration of measure that takes into account the parallel enlargement of k distinct sets. We show that the k-th eigenvalues of the metric Laplacian gives exponential improved concentration with k sets. On compact Riemannian manifolds, this allows us to recover estimates on the eigenvalues of the Laplace-Beltrami operator in the spirit of an inequality of Chung, Grigor’yan & Yau, Upper bounds for eigenvalues of the discrete and continuous Laplace operators. Adv. Math. 117(2), 165–178 (1996). [less ▲]Detailed reference viewed: 114 (6 UL) Visual characterization of associative quasitrivial nondecreasing functions on finite chainsKiss, Gergely in Fuzzy Sets and Systems (in press)Detailed reference viewed: 49 (7 UL) Labour, Gender and Ethnicities in the 'Heart of Manila'Espinosa, Shirlita Africa in Journal of Sociology (in press)Manila, like most cities in the developing world, is experiencing the effects of the flexibility of global capital and the consequences of being excluded from the flows of knowledge and finance. Quaipo ... [more ▼]Manila, like most cities in the developing world, is experiencing the effects of the flexibility of global capital and the consequences of being excluded from the flows of knowledge and finance. Quaipo, the 'heart of Manila', has responded to and negotiates with macroeconomic challenges through the underground economy of media piracy. Given the increase in population, unemployment and the general degradation of urban living amongst the poor, the economy of piracy has become a conduit of socio-economic changes that intersect with the culture-specific economy of worship. Quiapo is a fascinating terrain of Manilenos social history; it is the site of class tension, religious and ethnic divide, state intervention, and urban culture. Today, piracy and worship are forces by which the district's inhabitants and pilgrims define their lives and their labour. This essay examines how piracy and worship impact on the labour, space and gender dynamics of Quiapo. [less ▲]Detailed reference viewed: 202 (6 UL) Development of a Cued Pro- and Antisaccade Paradigm: An Indirect Measure to Explore Automatic Components of Sexual InterestOberlader, Verena A.; Ettinger, Ulrich; Banse, Rainer et alin Archives of Sexual Behavior (in press)We developed a cued pro- and antisaccade paradigm (CPAP) to explore automatic components of sexual interest. Heterosexual participants (n = 32 women, n = 25 men) had to perform fast eye movements towards ... [more ▼]We developed a cued pro- and antisaccade paradigm (CPAP) to explore automatic components of sexual interest. Heterosexual participants (n = 32 women, n = 25 men) had to perform fast eye movements towards and away from sexually relevant or irrelevant stimuli across a congruent (i.e. prosaccade towards sexually relevant stimuli, antisaccade away from sexually irrelevant stimuli) and an incongruent condition (i.e. prosaccade towards sexually irrelevant stimuli, antisaccade away from sexually relevant stimuli). We hypothesized that pro- and antisaccade performance would be influenced by the sexual interest-specific relevance of the presented stimulus (i.e., nude female or male stimulus) and the instructed task (i.e., pro- or antisaccade) and, thus, differ meaningfully between conditions. Results for prosaccades towards sexually relevant stimuli in the congruent condition showed that error rates were lower and latencies were shorter compared with prosaccades towards sexually irrelevant stimuli in the incongruent condition, but only for male participants. In addition, error rates for antisaccades away from sexually irrelevant stimuli in the congruent condition were lower than for antisaccades away from sexually relevant stimuli in the incongruent condition, for both female and male participants. Latencies of antisaccades, however, did not differ between conditions. In comparison with established indirect sexual interest paradigms, the CPAP benefits from measuring highly automated processes less prone to deliberate control. To this end, the CPAP could be applied to explore the interplay of early automatic and deliberate components of sexual information processing. [less ▲]Detailed reference viewed: 145 (1 UL) e3-service: an ontology for needs-driven real-world service bundling in a multi-supplier settingDe Kinderen, Sybren ; de Leenheer, Pieter; Gordijn, Jaap et alin Applied Ontology (in press)Businesses increasingly offer their services electronically via the Web. Take for example an Internet Service Provider. An ISP offers a variety of services, including raw bandwidth, IP connectivity, and ... [more ▼]Businesses increasingly offer their services electronically via the Web. Take for example an Internet Service Provider. An ISP offers a variety of services, including raw bandwidth, IP connectivity, and Domain Name resolution. Although in some cases a single service already satisfies a customer need, in many situations a customer need is so complex that a bundle of services is needed to satisfy the need, as with the ISP example. In principle, each service in a bundle can be provisioned by a different supplier. This paper proposes an ontology, e3service , that can be used to formally capture customer needs, services, and multisupplier service bundles of these. In addition, this paper contributes a process called PCM2 to reason with the ontology. First, a customer need is identified for which desired consequences are elicited. Then, the desired set of consequences is matched with consequences associated with services. The matching process results in a service bundle, satisfying the customer need, containing services that each can be provided by different suppliers. PCM2 is inspired by a family of formal reasoning methods called Propose-Critique-Modify (PCM). However, whereas PCM methods emphasize solution generation from a given set of requirements, our reasoning process treats the space of requirements as a first class citizen. Hence PCM2 : the requirements space and solution space are equally important. How the reasoning and matching process practically works, is illustrated by an industry strength case study in the healthcare domain. [less ▲]Detailed reference viewed: 192 (14 UL) Möglichkeiten statistischer Erhebungen für politische Strategien – Eine psychologische Deutung der Naturbewusstseinsstudie 2011Reese, Gerhard in BfN-Skripten (in press)Detailed reference viewed: 66 (2 UL) Boundlessly Entangled: Travels and Performances of School Hygiene in the Context of Open-Air Education (c. 1904-1936)Thyssen, Geert in Canadian Bulletin of Medical History (in press)This article develops a histoire croisée of health education using the example of open-air schools. It reflexively analyses the entangled performances of knowledge and praxis around hygiene in the context ... [more ▼]This article develops a histoire croisée of health education using the example of open-air schools. It reflexively analyses the entangled performances of knowledge and praxis around hygiene in the context of “international” open-air school conferences and in relation to “materials” of open-air education. Such performances reveal open-air schools as “practice and movement” unbound by “national” or otherwise imagined borders. Fragmentation accompanied their circulation and ensued from non/humans’ active, co-constitutive role in the mediation of knowledge and praxis. While underexplored, material and economic factors were key to this process. Their analysis enriches the study of the “internationalization” of school hygiene. [less ▲]Detailed reference viewed: 74 (10 UL) A Bayesian framework to identify random parameter fields based on the copula theorem and Gaussian fields: Application to polycrystalline materialsRappel, Hussein ; Wu, Ling; Noels, Ludovic et alin Journal of Applied Mechanics (in press)For many models of solids, we frequently assume that the material parameters do not vary in space, nor that they vary from one product realization to another. If the length scale of the application ... [more ▼]For many models of solids, we frequently assume that the material parameters do not vary in space, nor that they vary from one product realization to another. If the length scale of the application approaches the length scale of the micro-structure however, spatially fluctuating parameter fi elds (which vary from one realization of the fi eld to another) can be incorporated to make the model capture the stochasticity of the underlying micro-structure. Randomly fluctuating parameter fields are often described as Gaussian fields. Gaussian fi elds however assume that the probability density function of a material parameter at a given location is a univariate Gaussian distribution. This entails for instance that negative parameter values can be realized, whereas most material parameters have physical bounds (e.g. the Young's modulus cannot be negative). In this contribution, randomly fluctuating parameter fi elds are therefore described using the copula theorem and Gaussian fi elds, which allow di fferent types of univariate marginal distributions to be incorporated, but with the same correlation structure as Gaussian fields. It is convenient to keep the Gaussian correlation structure, as it allows us to draw samples from Gaussian fi elds and transform them into the new random fields. The bene fit of this approach is that any type of univariate marginal distribution can be incorporated. If the selected univariate marginal distribution has bounds, unphysical material parameter values will never be realized. We then use Bayesian inference to identify the distribution parameters (which govern the random fi eld). Bayesian inference regards the parameters that are to be identi fied as random variables and requires a user-defi ned prior distribution of the parameters to which the observations are inferred. For the homogenized Young's modulus of a columnar polycrystalline material of interest in this study, the results show that with a relatively wide prior (i.e. a prior distribution without strong assumptions), a single specimen is su ciffient to accurately recover the distribution parameter values. [less ▲]Detailed reference viewed: 135 (8 UL) Lettere alla redazione : il caso della “Buona Domenica” lussemburghese Un fenomeno mediatico italo-lussemburgheseCicotti, Claudio in El Ghibli - Rivista di Letteratura della Migrazione (in press)Detailed reference viewed: 108 (10 UL) Towards a European strategy to address the COVID-19 pandemicPriesemann, V.; Balling, Rudolf ; Bauer, S. et alin The Lancet (in press)How will the coronavirus disease 2019 (COVID-19) pandemic develop in the coming months and years? Based on an expert survey, we examine key aspects that are likely to influence the COVID-19 pandemic in ... [more ▼]How will the coronavirus disease 2019 (COVID-19) pandemic develop in the coming months and years? Based on an expert survey, we examine key aspects that are likely to influence the COVID-19 pandemic in Europe. The challenges and developments will strongly depend on the progress of national and global vaccination programs, the emergence and spread of variants of concern (VOCs), and public responses to non-pharmaceutical interventions (NPIs). In the short term, many people remain unvaccinated, VOCs continue to emerge and spread, and mobility and population mixing are expected to increase. Therefore, lifting restrictions too much and too early risk another damaging wave. This challenge remains despite the reduced opportunities for transmission given vaccination progress and reduced indoor mixing in summer 2021. In autumn 2021, increased indoor activity might accelerate the spread again, whilst a necessary reintroduction of NPIs might be too slow. The incidence may strongly rise again, possibly filling intensive care units, if vaccination levels are not high enough. A moderate, adaptive level of NPIs will thus remain necessary. These epidemiological aspects combined with economic, social, and health-related consequences provide a more holistic perspective on the future of the COVID-19 pandemic. [less ▲]Detailed reference viewed: 54 (1 UL)