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See detailIntergenerational Solidarity in Adulthood: The Role of Family Norms in Intergenerational Support and Ambivalence
Albert, Isabelle UL; Ferring, Dieter

in Drustvena Istrazivanja (2018), 1

Starting from Bengtson’s solidarity paradigm, we will investigate the role of internalized family norms in intergenerational support as well as experienced ambivalence from the adult child perspective. We ... [more ▼]

Starting from Bengtson’s solidarity paradigm, we will investigate the role of internalized family norms in intergenerational support as well as experienced ambivalence from the adult child perspective. We assume that internalized family norms are an important determinant of relationship regulation as they have an impact both on the selection of specific behavior as well as on its evaluation. As a consequence, own and others’ behavior should be most positively evaluated if it is in line with internalized norms and values. In contrast, if intergenerational solidarity and support exchange do not converge with internalized norms and expectations, ambivalence might be experienced. These assumptions are examined in a sample of N = 131 middle-aged adults living in Luxembourg and Germany, who reported on their relations toward their mothers and fathers. Findings showed that normative aspects of intergenerational solidarity were less important compared to affective aspects when predicting support exchange between adult children and their parents; however, family values had a moderating role in the relation between support exchange and ambivalence. Results are discussed with respect to the centrality of values in implicitly and explicitly guiding support behavior within families. [less ▲]

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See detailAn overview. Collaborative problem solving in large-scale assessments
Greiff, Samuel UL; Niepel, Christoph UL; Mustafic, Maida UL

Scientific Conference (2018, April)

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See detailUsing process data to explain group differences in complex problem solving
Eichmann, B.; Pucite, L.; Naumann, J. et al

Scientific Conference (2018, April)

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See detailUsability testing in large-scale assessments
Greiff, Samuel UL; Martin, Romain UL

Speeches/Talks (2018)

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See detailInteractive effects of comprehension and problem solving skills on digital reading performance and navigation
Naumann, J.; Pucite, L.; Eichmann, B. et al

Scientific Conference (2018, April)

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See detailOptimization of weighted individual energy efficiencies in interference networks
Matthiesen, Bho; Yang, Yang UL; Jorswieck, Eduard

in Proc. IEEE Wireless Communications and Networking Conference (2018, April)

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See detailSoziale Gerechtigkeit statt soziale Kohäsion!
Pauly, Michel UL

Article for general public (2018)

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See detailMore Necessary and Less Sufficient: An Age-Period-Cohort Approach to Overeducation in Comparative Perspective
Bar-Haim, Eyal UL; Chauvel, Louis UL; Hartung, Anne UL

E-print/Working paper (2018)

In many countries, the skilled labor market has lagged behind educational expansion. As a result of increased competition, younger cohorts of the highly educated face decreasing returns to education or ... [more ▼]

In many countries, the skilled labor market has lagged behind educational expansion. As a result of increased competition, younger cohorts of the highly educated face decreasing returns to education or overeducation. Surprisingly, decreasing occupational outcomes do not coincide empirically with the economic returns among those with tertiary education. Regarding the process of changes in economic returns to education based on cohort transformations, we expect that the expansion of tertiary education affects specific cohorts, which find themselves facing more labor market competition. As a result, the economic returns to education should decrease over cohorts even though they remain stable and even increase during the same period. To study this process, we model economic returns with a new Age-Period- Cohort-Trended-Lag (APCTLAG) method, which allows comparing the gap in economic returns between tertiary and less than tertiary education over cohorts. Using the Luxembourg Income Study (LIS), we analyze trends over three decades in 12 countries. Our results confirm that educational returns for tertiary education have declined over time, even though the gap between the educated and the less educated has remained similar in most of the countries. For younger cohorts, tertiary education has become more necessary to survive in the competitive labor market, but the actual economic returns to it have decreased - making tertiary education less sufficient than before. [less ▲]

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See detailLe régime d’Etat providence joue un rôle dans le bien-être
Samuel, Robin UL; Hadjar, Andreas UL; Brunel, Valentin

E-print/Working paper (2018)

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See detailUnlocking the Potential of Educationally Diverse Founding Teams for Firm Growth: The Moderating Role of New Venture Activities
Tryba, Anne UL; Patzelt, Holger; Breugst, Nicola

Scientific Conference (2018, April)

Although education field diversity in founding teams can be a key managerial resource for new ventures, working in diverse teams might also be challenging. Recent research indicates that the effects of ... [more ▼]

Although education field diversity in founding teams can be a key managerial resource for new ventures, working in diverse teams might also be challenging. Recent research indicates that the effects of diversity can only be understood by exploring their contingencies. Drawing on upper echelons theory, we argue that a new venture’s early activities will shape to what extent it can exploit the benefits of its founding team’s education field diversity to achieve firm growth. Using survey data from 103 young ventures in Luxembourg, this study shows that early planning helps new ventures to unlock the potential of their educationally diverse teams and contribute to venture growth. In addition, simultaneous planning and experimentation in the early phase moderates the relationship between education field diversity and venture growth, such that growth is highest when education field diversity, experimentation, and planning are high. [less ▲]

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See detailOpinion Statement ECJ-TF 4/2017 on the Decision of the Court of Justice of the European Union of 9 February 2017 in X (Case C-283/15 “Pro-Rata Personal Deductions”), Concerning Personal and Family Tax Benefits in Multi-State Situations
Haslehner, Werner UL; García Prats, Alfredo; Heydt, Volker et al

in European Taxation (2018)

The CFE welcomes the pro-rata approach to personal and family deductions developed in the X decision. In doing so, the Court contributes to the establishment of the internal market. Indeed, the pro-rata ... [more ▼]

The CFE welcomes the pro-rata approach to personal and family deductions developed in the X decision. In doing so, the Court contributes to the establishment of the internal market. Indeed, the pro-rata approach supports an open market economy with free competition, an efficient allocation of production factors, tax neutrality, a level playing field, international tax neutrality, the ability-to-pay principle, the direct benefit principle and origin-based taxation. The CFE, however, also notes that implementation of the principles established by X will pose a number of technical and policy issues for domestic legislators that have not yet been addressed by the Court. These include the calculation of the relevant proportions of income and possible mechanisms to avoid “cherry picking” by non-residents. [less ▲]

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See detailVelisarios: Byzantine Fault-Tolerant Protocols Powered by Coq
Rahli, Vincent UL; Vukotic, Ivana UL; Volp, Marcus UL et al

in ESOP 2018 (2018, April)

Our increasing dependence on complex and critical information infrastructures and the emerging threat of sophisticated attacks, ask for extended efforts to ensure the correctness and security of these ... [more ▼]

Our increasing dependence on complex and critical information infrastructures and the emerging threat of sophisticated attacks, ask for extended efforts to ensure the correctness and security of these systems. Byzantine fault-tolerant state-machine replication (BFT-SMR) provides a way to harden such systems. It ensures that they maintain correctness and availability in an application-agnostic way, provided that the replication protocol is correct and at least n-f out of n replicas survive arbitrary faults. This paper presents Velisarios a logic-of-events based framework implemented in Coq, which we developed to implement and reason about BFT-SMR protocols. As a case study, we present the first machine-checked proof of a crucial safety property of an implementation of the area's reference protocol: PBFT. [less ▲]

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See detailEnergy efficiency in MIMO interference channels: Social optimality and max-min fairness
Yang, Yang UL; Pesavento, Marius

in Proc. 2018 IEEE International Conference on Acoustics, Speech and Signal (2018, April)

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See detailA parallel best-response algorithm with exact line search for nonconvex sparsity-regularized rank minimization
Yang, Yang UL; Pesavento, Marius

in Proc. 2018 IEEE International Conference on Acoustics, Speech and Signal (2018, April)

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See detailEnabling lock-free concurrent workers over temporal graphs composed of multiple time-series
Fouquet, Francois; Hartmann, Thomas UL; Mosser, Sébastien

in 33rd Annual ACM Symposium on Applied Computing (SAC'18) (2018, April)

Time series are commonly used to store temporal data, e.g., sensor measurements. However, when it comes to complex analytics and learning tasks, these measurements have to be combined with structural ... [more ▼]

Time series are commonly used to store temporal data, e.g., sensor measurements. However, when it comes to complex analytics and learning tasks, these measurements have to be combined with structural context data. Temporal graphs, connecting multiple time- series, have proven to be very suitable to organize such data and ultimately empower analytic algorithms. Computationally intensive tasks often need to be distributed and parallelized among different workers. For tasks that cannot be split into independent parts, several workers have to concurrently read and update these shared temporal graphs. This leads to inconsistency risks, especially in the case of frequent updates. Distributed locks can mitigate these risks but come with a very high-performance cost. In this paper, we present a lock-free approach allowing to concurrently modify temporal graphs. Our approach is based on a composition operator able to do online reconciliation of concurrent modifications of temporal graphs. We evaluate the efficiency and scalability of our approach compared to lock-based approaches. [less ▲]

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See detailUser Rewarding and Distributed Payment Platforms for Mobile Crowdsensing Systems
Capponi, Andrea UL

Scientific Conference (2018, April)

Mobile Crowdsensing (MCS) has become in the last years one of the most prominent paradigms for urban sensing. In MCS systems, citizens actively participate in the sensing process by contributing data from ... [more ▼]

Mobile Crowdsensing (MCS) has become in the last years one of the most prominent paradigms for urban sensing. In MCS systems, citizens actively participate in the sensing process by contributing data from their mobile devices. To make e ective a MCS campaign, large participation is fundamental. Users sustain costs to contribute data and they may be reluctant in joining the sensing process. Hence, it is essential to incentivize participants. Several incentive mechanisms have been investigated, such as monetary rewarding. In this context, distributed payment platforms based on custom built blockchains assume a fundamental role. We aim to develop a platform to distribute micro-payments following rewarding schemes. The key idea is to di erentiate between users through several parameters, such as the amount of acquired data and the Quality of Information (QoI), according to the particular campaign and the need of the organizers. [less ▲]

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See detailUn crépuscule pour réveiller l'histoire
Scuto, Denis UL

Article for general public (2018)

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See detailRelations Between Parenting and Adolescent's Attachment in Families Differing in Solidarity Patterns
Lubiewska, Katarzyna; Albert, Isabelle UL; Trommsdorff, Gisela et al

in Social Development (2018)

To explain attachment development in adolescence in different contexts we applied the family solidarity model (e.g., Bengtson, 2001) generally used to analyze intergenerational adult children-elderly ... [more ▼]

To explain attachment development in adolescence in different contexts we applied the family solidarity model (e.g., Bengtson, 2001) generally used to analyze intergenerational adult children-elderly parents relations. The model differentiates four family solidarity patterns which were assumed in our study to occur in adolescent –parent relations, though with a different distribution. We tested a susceptibility hypothesis assuming that effects of parenting will be stronger in family patterns with higher, compared with lower, affectual solidarity. A sample of Polish adolescents, their mothers ( N=570, both), and their fathers ( N=290) was surveyed as part of the Value-of-Children Study (Trommsdorff & Nauck, 2005). Four family patterns were identified: highly affectual amicable and harmonious; and less affectual and most frequently displayed detached and disharmonious patterns. The parenting susceptibility hypothesis was supported: For amicable and harmonious families, adolescents’ perception of maternal rejection was more strongly related with their attachment compared with the other family types. Partly in line with our hypothesis, effects of paternal rejection on adolescents ’ attachment were strongest in amicable families, however, not significant in harmonious families. The study demonstrates that the relation between parenting on adolescents ’ attachment representation is influenced by the pattern of family parents –child relations. [less ▲]

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