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See detailFood Governance durch Qualitätszertifizierungen
Reckinger, Rachel UL; Kapgen, Diane UL; Korjonen, Maria Helena UL

in Godeman, Jasmin; Bartelmeß, Tina (Eds.) Handbuch Ernährungskommunikation. Interdisziplinäre Perspektiven im Kontext von Nachhaltigkeit (in press)

In diesem Beitrag wird das Potential von Qualitätszertifizierungen zur Förderung eines nachhaltigen oder ethisch verantwortlichen Lebensmitteleinkaufs, sowohl in Bezug auf VerbraucherInnen als auch ... [more ▼]

In diesem Beitrag wird das Potential von Qualitätszertifizierungen zur Förderung eines nachhaltigen oder ethisch verantwortlichen Lebensmitteleinkaufs, sowohl in Bezug auf VerbraucherInnen als auch Akteure des öffentlichen Beschaffungswesens, vorgestellt. Es wird gezeigt, dass Governance-basierte Qualitätszertifizierungen wie Label effiziente Kommunikationsinstrumente für nachhaltigkeitsorientierte Ernährung sein können, indem sie Ernährungskompetenz und nachhaltigeres Einkaufsverhalten bei potentiell widersprüchlichen Interessen fördern, insbesondere, wenn die Zertifizierung den Mehrwert des Produktes transparent aufzeigt und die definierten Nachhaltigkeitskriterien gesetzlich verpflichtend sind. Political food communication may take many forms, including direct recommendations to public institutions and private households (cf. Reckinger/Régnier 2017), or more indirect labelling schemes that certify various types of quality – from sustainable via nutritious to ethical. The underlying governance claims differ in those cases: in the first one, priority is given to analytical, top-down information to procurement actors and to individuals of a given population; in the second one, action is rather taken in the direction of food production and transformation, be it top-down or participatory, with an associated effort to make the communicated guarantees transparent to consumers. In this article, we will analyse in a praxeological perspective the contrasting governance claims that structure a selection of labelling schemes in contemporary Luxembourg: official ones (such as organic produce, among others), voluntary and regional ones, international ones, as well as supermarket brands blurring boundaries and using overlaps of several labels. We will compare the guarantees and transparency that labels tend to offer in the socio-ecological, socioeconomic, sociocultural and socio-political dimensions of food certification, viewed as a potentially enabling or disabling form of food communication. At the same time, we will examine the potential of these aids for individual consumers’ priorities and public procurement actors’ legal framework in selecting foodstuffs with added sustainable or ethical value, asking the question if such certifications are efficient tools of food communication and ultimately of an enhanced food literacy in an arena of potentially conflicting and crowded messages. [less ▲]

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See detailChancen für Luxemburgs (Finanz-)Wirtschaft in und nach der Krise
Dörry, Sabine; Schulz, Christian UL

in Mein, Georg; Pause, Johannes (Eds.) Self and Society in the Corona Crisis (in press)

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See detailThe "failure" of cooperatives in Kyrgyzstan? A postcapitalist critique of a biased narrative
Cima, Ottavia UL

in Geographica Augustana (in press)

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See detailUsing cohort data to emulate lifestyle interventions: Long-term beneficial effects of initiating physical activity on cognitive decline and dementia
Leist, Anja UL; Muniz-Terrera, Graciela; Solomon, Alina

in Alzheimer's and Dementia: the Journal of the Alzheimer's Association (in press)

Background: Intervention studies have shown beneficial short-term effects of physical activity on cognitive decline and reduced risk of dementia. However, randomized controlled trial data of lifestyle ... [more ▼]

Background: Intervention studies have shown beneficial short-term effects of physical activity on cognitive decline and reduced risk of dementia. However, randomized controlled trial data of lifestyle interventions over long time spans are not available due to lack of resources, feasibility or ethical reasons. Drawing from the principles of emulating a ‘target trial’, which apply design principles of randomized trials to the analysis of observational data, cohort data of a large European survey were analyzed to understand the long-term effects of physical activity changes. Method: Biennial assessments of the economic, social, and health situation of respondents aged 50 and older came from the Survey of Health, Ageing and Retirement in Europe (2004-2017). Cognitive functioning (immediate recall, delayed recall, and verbal fluency) and self-reported diagnosis of dementia were assessed at each follow-up. The target trial included sedentary respondents at t1 who, at follow-up (t2), stayed sedentary (“control group”) or newly reported vigorous physical activity more often than once a week (initiators, “treatment group”). Inclusion and exclusion criteria were implemented as close as possible to those of the FINGER trial. Inverse-probability weighting accounted for the probability of initiating physical activity with a large set of predictor variables. Selecting respondents aged 50-85 years old who met the target trial inclusion and exclusion criteria, assessments of cognitive functioning and self-reported diagnosis of dementia were available for 8,781 respondents at t3 (on average 3.02 years later), 3,858 respondents at t4 (5.84 years), and 2,304 respondents at t5 (7.72 years). A total of 304 respondents reported a diagnosis of dementia. Result: Initiators of vigorous physical activity had higher cognitive functioning at two follow-ups compared to non-initiators (t3: “average treatment effect on the treated”, ATET=0.059, CI: 0.028, 0.090), which remained significant after implementing inclusion and exclusion criteria. Initiators had lower risk of dementia compared to non-initiators at all three follow-ups (t3: ATET=-0.009, CI: -0.015, -0.005, relative risk decrease -46.7%), remaining significant after implementing inclusion and exclusion criteria. Conclusion: Emulating a target trial showed long-term benefits of initiating physical activity for cognitive functioning and dementia risk. Multidomain interventions related to nutrition, social, cognitive activities etc. can be similarly emulated. [less ▲]

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See detailSoziale Arbeit und Sozialpolitik in Luxemburg - Entwicklungen und Reformprozesse
Biewers, Sandra UL; Schumacher, Anette UL; Meyers, Christiane UL

in Thole, Werner (Ed.) Grundriss Soziale Arbeit (in press)

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See detailThe return of borders. Ein Kommentar zur Grenzraumforschung in Zeiten der Vergrenzungen
Wille, Christian UL

in Terrollion, Karl; Theis, Roland; Weber, Florian (Eds.) COVID-19, die Zäsur der Grenzkontrollen und die deutsch-französischen Beziehungen. Erfahrungen und Lehren aus der Krise (in press)

Der Beitrag geht von einem angebrochenen Zeitalter der Vergrenzungen aus und skizziert, wie die interdisziplinäre Grenzforschung und europäische Grenzraumforschung mit der Renaissance von Grenzen umgehen ... [more ▼]

Der Beitrag geht von einem angebrochenen Zeitalter der Vergrenzungen aus und skizziert, wie die interdisziplinäre Grenzforschung und europäische Grenzraumforschung mit der Renaissance von Grenzen umgehen. Dabei wird die enge Verflechtung der Grenzraumforschung mit dem politischen Projekt der europäischen Integration und ihr Fokus auf die Permeabilität von Grenzen deutlich. Allerdings wird zugleich erkennbar, dass die Leitidee eines Europa ohne Grenzen in den letzten Jahrzehnten erheblich an Strahlkraft eingebüßt hat, zuletzt durch die temporäre Verstärkung der Kontrollen im Schengen-Raum (2015/2016) und die temporären Schließungen der EU-Grenzen (2020). Die zunehmend um sich greifenden Vergrenzungsprozesse in Grenzregionen werden außerdem im Alltag ihrer Einwohner*innen nachgezeichnet. Der Beitrag schlägt abschließend eine Perspektivweitung der europäischen Grenzraumforschung vor, die die Durabilität von Grenzen berücksichtigt und somit Vergrenzungen an den EU-Binnengrenzen besser zu verstehen hilft. [less ▲]

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See detailSignal-Based Properties of Cyber-Physical Systems: Taxonomy and Logic-based Characterization
Boufaied, Chaima UL; Jukss, Maris; Bianculli, Domenico UL et al

in Journal of Systems and Software (in press)

The behavior of a cyber-physical system (CPS) is usually defined in terms of the input and output signals processed by sensors and actuators. Requirements specifications of CPSs are typically expressed ... [more ▼]

The behavior of a cyber-physical system (CPS) is usually defined in terms of the input and output signals processed by sensors and actuators. Requirements specifications of CPSs are typically expressed using signal-based temporal properties. Expressing such requirements is challenging, because of (1) the many features that can be used to characterize a signal behavior; (2) the broad variation in expressiveness of the specification languages (i.e., temporal logics) used for defining signal-based temporal properties. Thus, system and software engineers need effective guidance on selecting appropriate signal behavior types and an adequate specification language, based on the type of requirements they have to define. In this paper, we present a taxonomy of the various types of signal-based properties and provide, for each type, a comprehensive and detailed description as well as a formalization in a temporal logic. Furthermore, we review the expressiveness of state-of-the-art signal-based temporal logics in terms of the property types identified in the taxonomy. Moreover, we report on the application of our taxonomy to classify the requirements specifications of an industrial case study in the aerospace domain, in order to assess the feasibility of using the property types included in our taxonomy and the completeness of the latter. [less ▲]

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See detailEngagement féministe en sons et en images dans l’œuvre cinématographique d’Assia Djebar
Barthelmebs-Raguin, Hélène UL

in Guaaybess, Tourya; Di Cesare, Nurit; Levy, Jessica (Eds.) et al Femmes engagées au cœur de l’action. Mise en récit(s), mise en image(s) (in press)

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See detailPre-Hurricane Consumer Stockpiling and Post- Hurricane Product Availability: Empirical Evidence from Natural Experiments
Pan, Xiaodan; Dresner, Martin; Mantin, Binyamin UL et al

in Production and Operations Management (in press)

The provision of essential supplies is a key service provided by retailers when demand spikes due to consumer stockpiling during environmental emergencies. Moreover, it is important for retailers to ... [more ▼]

The provision of essential supplies is a key service provided by retailers when demand spikes due to consumer stockpiling during environmental emergencies. Moreover, it is important for retailers to quickly recover from these events by replenishing the stock of essential supplies to meet the continuing needs of local residents. The main purpose of this research is to study consumer precautionary stockpiling behavior prior to the onset of hurricane landfalls and determine the impact of this behavior on in-store product availability for various formats of retail store outlets. Specifically, we focus on the bottled water product category, an essential emergency category in hurricane preparedness. This study combines an event analysis methodology with econometric models using archival retail scanner data from 60 U.S. retail chains located in 963 counties and real-time data from four recent U.S. continental hurricanes. We find that supply-side characteristics (retail network and product variety), demand-side characteristics (hurricane experience and household income), and disaster characteristics (hazard proximity and hazard intensity) significantly affect consumer stockpiling propensity as the hurricanes approach. The increased consumer stockpiling has immediate and longer-term impacts on retail operations, namely, in-store product availability. Among various retail formats, drug stores are associated with the highest consumer stockpiling propensity before hurricanes, while dollar stores and discount stores are associated with the lowest in-store product availability following hurricanes. Our study points to the need for retailers and policymakers to carefully monitor factors affecting consumer stockpiling behavior that will allow for better allocation of critical supplies during the hurricane season. [less ▲]

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See detailReconceptualizing the Multilingual Child: Curriculum Construction in Luxembourg
Sattler, Sabrina UL

in Roberts, Philip; Brennan, Marie; Green, Bill (Eds.) Curriculum Challenges and Opportunities in a Changing World (in press)

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See detailA Discrete Element Framework for Modeling the Mechanical Behaviour of Snow PART I: Mechanical Behaviour and Numerical Model
Kabore, Brice Wendlassida UL; Peters, Bernhard UL; Michael, Mark et al

in Granular Matter (in press)

A framework for investigating the mechanics of snow is proposed based on an advanced micro-scale approach. Varying strain rates, densities and temperatures are taken into account. Natural hazards i.e ... [more ▼]

A framework for investigating the mechanics of snow is proposed based on an advanced micro-scale approach. Varying strain rates, densities and temperatures are taken into account. Natural hazards i.e. snow avalanches are triggered by snow deforming at low rates, while a large group of industrial applications concerning driving safety or winter sport activities require an understanding of snow behaviour under high deformation rates. On the micro-scale, snow is considered to consist of ice grains joined by ice bonds to build a porous structure. Deformation and failure of bonds and the inter-granular collisions of ice grains determine the macroscopic response under mechanical load. Therefore, this study proposes an inter-granular bond and collision model for snow based on the discrete element method (DEM) to describe interaction on a grain-scale. It aims at predicting the mechanical behaviour of ice particles under different strain rates using a unified approach. Thus, the proposed algorithm predicts the displacement of each individual grains due to inter-granular forces and torques that derive from bond deformation and grain collision. For this purpose, the inter-granular characteristics are approximated by an elastic viscous-plastic material law which is based on the temperature-dependent properties of poly-crystalline ice Ih. [less ▲]

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See detailThe Role of Teachers in Students’ Social Inclusion in the Classroom
Gasser, Luciano; Cillessen, Antonius H.N.; Huber, Christian et al

in Frontiers in Education (in press)

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See detailSISTA: Learning Optimal Transport Costs under Sparsity Constraints
Dupuy, Arnaud UL; Carlier, Guillaume; Galichon, Alfred et al

in Communications on Pure and Applied Mathematics (in press)

In this paper, we describe a novel iterative procedure called SISTA to learn the underlying cost in optimal transport problems. SISTA is a hybrid between two classical methods, coordinate descent (“S” ... [more ▼]

In this paper, we describe a novel iterative procedure called SISTA to learn the underlying cost in optimal transport problems. SISTA is a hybrid between two classical methods, coordinate descent (“S”-inkhorn) and proximal gradient descent (“ISTA”). It alternates between a phase of exact minimization over the transport potentials and a phase of proximal gradient descent over the parameters of the transport cost. We prove that this method converges linearly, and we illustrate on simulated examples that it is significantly faster than both coordinate descent and ISTA. We apply it to estimating a model of migration, which predicts the flow of migrants using country-specific characteristics and pairwise measures of dissimilarity between countries. This application demonstrates the effectiveness of machine learning in quantitative social sciences. [less ▲]

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See detailUnemployment at 50+: economic and psychosocial consequences
Murdock, Elke UL; Filbig, Marceline; Borges Neves, Rita

in Wanka, Anna; Walsh, Kieran; Scharf, Thomas (Eds.) et al Social Exclusion in Later Life: Interdisciplinary and Policy Perspectives. International Perspectives on Aging (in press)

Throughout the lifespan, unemployment has severe consequences in terms of economic exclusion, and overall social exclusion, but is compounded in older age. Within the EU, a growing number of older adults ... [more ▼]

Throughout the lifespan, unemployment has severe consequences in terms of economic exclusion, and overall social exclusion, but is compounded in older age. Within the EU, a growing number of older adults (50+) are affected by joblessness. Job loss at a later stage in a professional career may determine an early and permanent exit from the labour market with significant psychosocial consequences. Herein lies the age-specific risk for older unemployed adults: once becoming unemployed they are at greater risk at staying unemployed. As a result, older unemployed people may face income cuts, deprivation of a central adulthood role and their mental and physical health may suffer. In this chapter, we draw attention to the latent functions of work, and the psychosocial consequences of job loss in later life. Applying a life-course perspective, the aim of this chapter is to explore how job loss can be framed as a form of acute economic exclusion, and how this exclusion can have significant implications for poor mental health. In a context of rising retirement ages, and the lack of preparedness of the labour market to deal with an ageing workforce, it is essential to understand these dynamics to guide policy development. [less ▲]

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See detailLimit theorems for integral functionals of Hermite-driven processes
Garino, Valentin UL; Nourdin, Ivan UL; Nualart, David et al

in Bernoulli (in press)

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See detailLocal times and sample path properties of the Rosenblatt process
Kerchev, George UL; Nourdin, Ivan UL; Saksman, Eero et al

in Stochastic Processes and Their Applications (in press)

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See detailGoal-Directed Decision Procedures for Input/Output Logics
Steen, Alexander UL

in Marra, Alessandra; Liu, Fenrong; Portner, Paul (Eds.) et al Deontic Logic and Normative Systems: 15th International Conference (DEON2020/2021, Munich) (in press)

Input/Output (I/O) logics address the abstract study of conditional norms. Here, norms are represented as pairs of formulas instead of statements that themselves carry truth-values. I/O logics have been ... [more ▼]

Input/Output (I/O) logics address the abstract study of conditional norms. Here, norms are represented as pairs of formulas instead of statements that themselves carry truth-values. I/O logics have been studied thoroughly in the past, including further applications and refinements. In this paper, a class of automated reasoning procedures is presented that, given a set of norms and a concrete situation, decide whether a specific state of affairs is obligatory according to the output operations of I/O logics. The procedures are parametric in the underlying logical formalism and can be instantiated with different classical objects logics, such as propositional logic or first-order logic. The procedures are shown to be correct, and a proof-of-concept implementation for propositional I/O logics is surveyed. [less ▲]

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See detailRisk disclosure and firm operational efficiency
Derouiche, Imen UL; Manita, riadh; Muessig, Anke UL

in Annals of Operations Research (in press)

This paper examines the effect of risk disclosure on firm operational efficiency using a unique database of nonfinancial, and non-utility French firms belonging to the SBF 120 index over the period ... [more ▼]

This paper examines the effect of risk disclosure on firm operational efficiency using a unique database of nonfinancial, and non-utility French firms belonging to the SBF 120 index over the period 2007–2015. In a first step, we use a data envelopment analysis output-oriented variable returns to scale model to determine firm operational efficiency scores based on one output (i.e., sales revenue) and three inputs (i.e., net property, plant, and equipment; cost of goods sold; and selling, general, and administrative costs). These scores are used in a second step to estimate the effect of risk disclosure on operational efficiency after controlling for a set of other factors. The empirical results show a statistically significant positive relation between risk disclosure and operational efficiency, suggesting that firms tend to be relatively more efficient when they disclose more about their risk exposure. Overall, we provide evidence that firms with greater risk disclosure are seen by stakeholders as more credible and trustworthy, leading them to conduct better transactions and, consequently, to improve their operational efficiency. This result is consistent with the notion that stakeholders perceive transparent firms positively, particularly those revealing bad news. [less ▲]

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See detailBuilding FinTech Ecosystems: Regulatory Sandboxes, Innovation Hubs and Beyond
Buckley, Ross; Arner, Douglas; Veidt, Robin UL et al

in Washington University Journal of Law and Policy (in press), 61

Around the world, regulators and policymakers are working to support the development of financial technology (FinTech) ecosystems. As one example, over 50 jurisdictions have now established or announced ... [more ▼]

Around the world, regulators and policymakers are working to support the development of financial technology (FinTech) ecosystems. As one example, over 50 jurisdictions have now established or announced “financial regulatory sandboxes”. Others have announced or established “innovation hubs”, sometimes incorporating a regulatory sandbox as one element. This article argues that innovation hubs provide all the benefits that the policy discussion associates with regulatory sandboxes, while avoiding most downsides of regulatory sandboxes, and that many benefits typically attributed to sandboxes are the result of inconsistent terminology, and actually accrue from the work of innovation hubs. The paper presents, as the first contribution of its kind, data on regulatory sandboxes and innovation hubs and argues that the data so far available on sandboxes does not justify the statement that regulatory sandboxes are the most effective approach to building FinTech ecosystems. Given that regulatory sandboxes require significant financial contributions, sometimes new legislation, and intense regulatory risk management, and that sandboxes do not work as well on a stand-alone basis (i.e. without an innovation hub), while innovation hubs alone can provide more significant benefits in supporting the development of a FinTech ecosystem, regulators should focus their resources on developing effective innovation hubs, including in appropriate cases a sandbox as one possible element. [less ▲]

Detailed reference viewed: 156 (6 UL)