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See detailHow working conditions influence work-related anger
Steffgen, Georges UL; Sischka, Philipp UL

Scientific Conference (2018, July 13)

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See detailGlobal inequalities 1980-2050: a microdata oriented simulation – Worldsim
Chauvel, Louis UL; Bar-Haim, Eyal UL; Hartung, Anne UL et al

Scientific Conference (2018, July 13)

Former global inequality models lack realistic features of the population (age, gender, education, behavior). Worldsim develops a panel sample based simulation of the world population until 2050, relying ... [more ▼]

Former global inequality models lack realistic features of the population (age, gender, education, behavior). Worldsim develops a panel sample based simulation of the world population until 2050, relying on UN, Cepii, etc, big data aggregated forecasts, that we individually disaggregate. The simulation confirms the decline of the world's Gini index, but underlines several paradoxes in the socioecodemography of the world, with increasing gaps between resources and needs. Compared to more standard socioeconomic simulations of inequalities, we provide more substantial characterization of the population, and compared to other global simulations, we capture the dimensions of social divergences between social groups and geographic regions. [less ▲]

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See detailPsychological contact violation or basic need frustration? Psychological mechanisms behind the effects of workplace bullying.
Sischka, Philipp UL; Steffgen, Georges UL

Scientific Conference (2018, July 12)

Workplace bullying is a serious phenomenon that has serious detrimental effects on victim’s health, attitudes, and work-related behavior. However, research that examines the mechanisms behind these ... [more ▼]

Workplace bullying is a serious phenomenon that has serious detrimental effects on victim’s health, attitudes, and work-related behavior. However, research that examines the mechanisms behind these relations is still sparse. Two theories that may explain the links between workplace bullying and various negative outcomes are social exchange theory and self-determination theory. Drawing on these theories, we hypothesized that the relationship between workplace bullying and various outcomes is mediated by perceptions of psychological contract violation and the frustration of basic psychological needs (i.e. autonomy, competence, relatedness). Therefore, the aim of our study was to test these mediators separately and simultaneously to see whether they have an incremental mediation effect between workplace bullying and well-being, work satisfaction, engagement, performance, burnout, workplace deviance and turnover intentions. An online survey design was employed and data were collected among U.S. employees. The final sample consists of 1,408 respondents (56.6% females, n=798, age: M=37.3, SD =10.4). Single mediation analysis within a structural equation modeling framework revealed that psychological contract violation acted as a mediator for all outcome variables. Furthermore, basic need frustrations were also meaningfully mediators between workplace bullying and all outcomes, but different need frustration were differently linked with them. The multiple mediation analyses mainly supported the hypothesized importance of the mediators for the different outcomes. The study findings advance the field through identifying the most important mediators between workplace bullying and several outcome variables guiding possible interventions. [less ▲]

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See detailThe Extented Discrete Element Method (XDEM): An Advanced Approach to Model Blast Furnace
Peters, Bernhard UL; Maryam, Baniasadi; Baniasadi, Mehdi UL

in Iron Ores and Iron Oxide Materials (2018)

The blast furnace iron making is the oldest but still the main method to produce liquid iron through sequential reduction processes of iron ore materials. Despite the existence of several discrete and ... [more ▼]

The blast furnace iron making is the oldest but still the main method to produce liquid iron through sequential reduction processes of iron ore materials. Despite the existence of several discrete and continuous numerical models, there is no global method to provide detailed information about the processes inside the furnaces. The extended discrete element method known as XDEM is an advance numerical tool based on Eulerian – Lagrangian framework which is able to cover more information about the blast furnace process. Within this plat- form, the continuous phases such as gas and liquid phases are coupled to the discrete entities such as coke and iron ore particles through mass, momentum and energy exchange. This method has been applied to the shaft, cohesive zone, dripping zone and hearth of the blast furnace. In this chapter, the mathematical and numerical methods implemented in the XDEM method are described, and the results are discussed. [less ▲]

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See detailSessions about Cross-border workers and cross-border Labour markets
Pigeron-Piroth, Isabelle UL; Rachid, Belkacem

Presentation (2018, July 11)

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See detailCommémorations, scandale et circulation de l’information : le Centenaire de la bataille de Verdun sur Twitter
Clavert, Frédéric UL

in French Journal For Media Research (2018), 10(2018),

The Centenary of the Great War gave birth to numerous commemorations. On the on-line social network Twitter, millions of tweets mention it. By analyzing data collected on Twitter, this article, after ... [more ▼]

The Centenary of the Great War gave birth to numerous commemorations. On the on-line social network Twitter, millions of tweets mention it. By analyzing data collected on Twitter, this article, after giving an overview of the traces of the centenary on this network, looks at the case of the polemical commemorations of the Battle of Verdun. [less ▲]

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See detailEnhancing mobile services with DVB-S2X superframing
Mazzali, Nicolò UL; Boumard, Sandrine; Kinnunen, Jouko et al

in International Journal of Satellite Communications and Networking (2018)

DVB-S2X is the cornerstone for satellite communication standards forming the state of the art of broadband satellite waveforms. In this paper, we propose new application scenarios and advanced techniques ... [more ▼]

DVB-S2X is the cornerstone for satellite communication standards forming the state of the art of broadband satellite waveforms. In this paper, we propose new application scenarios and advanced techniques, including a reference design implementing superframing, predistortion, a robust synchronization chain, and a plug-and-play channel interleaver. We demonstrate by means of software simulations and hardware tests that the DVB-S2X can be a common technology enabler for land-mobile, aeronautical, and maritime satellite scenarios in addition to the more traditional VSAT scenario, even in very challenging conditions (eg, very low signal-to-noise ratio). [less ▲]

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See detailA decision support system for energy saving in Waste Water Treatment Plants
Torregrossa, Dario UL

Doctoral thesis (2018)

Waste Water Treatment Plants (WWTPs) are complex facilities, in which an efficient energy management can produce relevant benefits for the environment and the economy. Today, big data can be used for a ... [more ▼]

Waste Water Treatment Plants (WWTPs) are complex facilities, in which an efficient energy management can produce relevant benefits for the environment and the economy. Today, big data can be used for a more efficient plant management, enabling high-frequency assessment and ultimately a more efficient use of resources. In order to achieve this, a computer-based support is necessary to analyse the enormous amount of data that WWTP sensors can produce. When this PhD project started, the literature review showed that, in the WWTP domain, the few available decision support systems (DSSs) were promising but still with large room for improvements; in fact, these tools were plant-specific, focussed mainly on process parameters and (most of them) working with low-frequency aggregated data (yearly data). This thesis instead proposes a cooperative decision support system called Shared Knowledge Decision Support System (SK-DSS). SK-DSS is plant generic, i.e. able to simultaneously work with many WWTPs and based on key performance indicators. SK-DSS analyses the processes occurring in the plants and provide case-based solutions. Moreover, this DSS provides a platform to enable the plant managers to exchange information and cooperate. This thesis proposes the model of SK-DSS, a web-application, and applications to improve the energy performance of pump, blowers and biogas. [less ▲]

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See detailComparative Evaluation of Models of Assistive Technologies’ Use
Abrilahij, Afsaneh UL; Boll, Thomas UL

Scientific Conference (2018, July 06)

Many older people have functional limitations and are at risk of losing their ability to live autonomously. Assistive Technology (AT) could help to reduce that risk. However, many older people don’t use ... [more ▼]

Many older people have functional limitations and are at risk of losing their ability to live autonomously. Assistive Technology (AT) could help to reduce that risk. However, many older people don’t use ATs. Our presentation reviews existing models of ATs use, their applicability to specific types of AT, predictive value, fundamental elements, and critiques of such models. In systematic literature searches in PsycINFO, MEDLINE, and Google Scholar 46 papers were identified that met our inclusion criteria. 32 papers covered models of ATs use, applicability to special types of ATs, components of models, and their predictive value. 14 papers cover criticisms of models of AT use. We classified the models into two groups: The first included 11 models focusing on individuals’ mental states (e.g., beliefs, desires) as factors explaining ATs use; the second included 22 models that also considered contextual factors (e.g., social influence, physical environment) in addition to individuals’ mental states. Across both groups the most frequently included explanatory components were subjective norm and personal attitudes towards AT use, followed by perceived usefulness, perceived ease of use and then intention to use. Models were most frequently applied to information technologies followed by application to socially assistive robots. Unified Theory of Acceptance and Use of Technology 2 (UTAUT2) and an extended version of Technology Acceptance Model showed the highest amount of explained variance in intention to use (56-74%) and an extended model of UTAUT in actual use of ATs (64%). We conclude with recommendations for further improvement of AT use models. [less ▲]

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See detailThe Reasons of Older people for the Use or Non-use of Assistive Technologies:
A Systematic Review of Qualitative Studies
Abrilahij, Afsaneh UL; Boll, Thomas UL

Scientific Conference (2018, July 06)

The baby boomer generation is aging and the proportion of older people in the population is increasing. While people age, functional, cognitive, and physical problems increase. Assistive technology (AT ... [more ▼]

The baby boomer generation is aging and the proportion of older people in the population is increasing. While people age, functional, cognitive, and physical problems increase. Assistive technology (AT) can help to overcome some activity limitations relevant to aging. Although ATs have potential benefits (e.g., to reduce the burden of caregivers, to increase independence), their usage rate is still low. Whereas several reviews of quantitative studies on factors of ATs use already exist, a systematic review of qualitative research about AT use is still missing. The aim of the current review is to provide more differentiated answers about what makes some older people use ATs while others not. Based on systematic literature searches in PsycINFO, MEDLINE, and Google Scholar databases 18 relevant papers were identified according to our selection criteria. These studies were based on to self-reported reasons of older people for using or not-using diverse types of ATs designed for many different activities. We classified the key reasons as referring to three aspects: attributes of “potential technology users”, “context”, and “technology”. Perceived usefulness and attitudes towards use were the most common “personal” reasons and social impact by significant others was the most common “contextual” reason, and technology design was the most common “technological” reason influencing use or non-use of ATs. We discussed the identified reasons in relation to the major models of developmental self-regulation and action-theoretical approaches to development in age. Based on the current review, we generated methodological and theoretical recommendations for future research and for practical applications. [less ▲]

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See detailNational, European or Cosmopolitan identification? Insights from the heart of Europe
Murdock, Elke UL; Kraus, Xavier; Ferring, Dieter UL

Scientific Conference (2018, July 04)

Trilingual Luxembourg shares borders with three European countries and has a foreign population percentage of 47%. Given this multicultural context we wanted to explore firstly the national, supra ... [more ▼]

Trilingual Luxembourg shares borders with three European countries and has a foreign population percentage of 47%. Given this multicultural context we wanted to explore firstly the national, supra-national or non-national identification among the native population, secondly their stereotypical judgements of EU Member State countries and attitudes towards the European Union and thirdly identify predictors for cosmopolitanism. With a sentence completion task we investigated the reasons for a feeling of belonging to a national entity or lack of it. All 255 participants in our study (Mage = 38.8 SD = 10.7, 59% female) had Luxembourgish citizenship. Forty percent provided a national self-identification (“Luxembourger”), 36% supra-national identification (“European”) and 24% a non-national identification (“cosmopolitan”). These three groups did not differ in terms of stereotypical assessments of the EU Member states regarding warmth and competence (stereotype content model). Yet, when asked about their own assessment of Luxembourg, differences occurred with supra- and non-national identifiers providing significantly lower ratings under the self-rating condition. The three groups differed in their attitude towards the European Union. Low commitment (MEIM subscale), high contact with non-natives and group self-identification predicted cosmopolitanism. There were no effects in terms of self-efficacy, age, gender or socioeconomic status. The content analysis of the sentence completion exercise revealed that affective components dominated arguments for belonging whereas cognitive reasoning governed the statements expressing a lack of belonging. The implications of these findings among natives within the multicultural context of Luxembourg will be discussed – against the rise of nationalism in many European countries and beyond. [less ▲]

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See detailExplicit and implicit speaker evaluations and their differential attitudinal determinants
Lehnert, Tessa Elisabeth UL; Krolak, Sabine UL; Hörstermann, Thomas UL

in Language Sciences (2018), 69

Previous speaker evaluation studies have traditionally assessed the influence of attitudes toward languages with explicit self-report measures. Social-cognitive theories positing a differential influence ... [more ▼]

Previous speaker evaluation studies have traditionally assessed the influence of attitudes toward languages with explicit self-report measures. Social-cognitive theories positing a differential influence of explicit and implicit attitudes on controlled versus automatic evaluative responses have not been addressed in this domain thus far. In addition to separating attitudes toward languages from attitudes toward nationality, the aim of this study was to test whether explicit and implicit speaker evaluations refer to distinct concepts. We expected that explicit attitudes would be stronger predictors of deliberate speaker evaluations than implicit attitudes would. By contrast, we expected that automatic evaluations examined with an evaluative priming task would primarily reflect implicit attitudes. Results showed that explicit speaker evaluations were influenced by explicit attitudes toward nationality, whereas implicit evaluations were mainly predicted by implicit attitudes toward nationality. The crucial role of speaker’s nationality in speaker evaluation processes is further discussed within the framework of implicit group processes. [less ▲]

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See detailAn n-ary generalization of the concept of distance
Kiss, Gergely; Marichal, Jean-Luc UL; Teheux, Bruno UL

Scientific Conference (2018, July 03)

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See detailOn associative, idempotent, symmetric, and nondecreasing operations
Devillet, Jimmy UL; Teheux, Bruno UL

Scientific Conference (2018, July 02)

see attached file

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See detailAssociative and quasitrivial operations on finite sets: characterizations and enumeration
Couceiro, Miguel; Devillet, Jimmy UL; Marichal, Jean-Luc UL

Scientific Conference (2018, July 02)

We investigate the class of binary associative and quasitrivial operations on a given finite set. Here the quasitriviality property (also known as conservativeness) means that the operation always outputs ... [more ▼]

We investigate the class of binary associative and quasitrivial operations on a given finite set. Here the quasitriviality property (also known as conservativeness) means that the operation always outputs one of its input values. We also examine the special situations where the operations are commutative and nondecreasing, in which cases the operations reduce to discrete uninorms (which are discrete fuzzy connectives playing an important role in fuzzy logic). Interestingly, associative and quasitrivial operations that are nondecreasing are characterized in terms of total and weak orderings through the so-called single-peakedness property introduced in social choice theory by Duncan Black. We also address and solve a number of enumeration issues: we count the number of binary associative and quasitrivial operations on a given finite set as well as the number of those operations that are commutative and/or nondecreasing. [less ▲]

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See detailApprentissage formel, non-formel et informel de musique dans la communauté. Comment correspondent-ils
Sagrillo, Damien UL

Scientific Conference (2018, July 02)

Tandis que le concept de l’apprentissage formel, non-formel et informel est supposé connu en ce qui concerne ses orientations générales, il en est moins pour la pédagogie musicale. Sa vue sous différents ... [more ▼]

Tandis que le concept de l’apprentissage formel, non-formel et informel est supposé connu en ce qui concerne ses orientations générales, il en est moins pour la pédagogie musicale. Sa vue sous différents angles, notamment sous l’optique de la musique pour amateurs, fera l’objet de ma communication. De l'autre côté, le concept de musique dans la communauté est emprunté de l’anglais « community music ». Celui-ci signifie que la pratique des amateurs de musique est fondée sur des activités de loisir. Mais il existe bien d’autres volets qui pourraient être regroupés sous la perspective d’une musique dans ou par la communauté. D’abord il semble qu’il est totalement dissocié des méthodes traditionnelles d’apprentissage musical de nature formelle ou non-formelle. Mais il serait plutôt lié à une éducation de nature informelle qui, cependant, ne peut pas être mise en relation avec l’autodidactie. Des approches récentes la voient en rapport avec l’inclusion et la participation réalisée dans un milieu associatif et comme moyen de surmonter l’obstacle qui existe entre la pédagogie musicale traditionnelle et les exigences de la communauté musicale. De l’autre côté, la musique dans la communauté se présente comme un contre-projet face à la haute culture musicale professionnalisée (Lichtinger 2013). En ce qui concerne le terme de « community music », il n’existe pas de traduction littérale française. Cependant, il est parfaitement approprié de retracer le processus d’une éducation musicale des jeunes qui commence souvent par une phase amateur pour mener par après à la vie professionnelle pour les plus doués, soit pour décrire la formation et la vie musicale des jeunes amateurs, soit pour retracer la vie de musicien amateur tout au long de la vie de ces musicophiles. Dans ma communication, je présenterai des définitions pour chacun des trois aspects de formation musicale n’ignorant pas que surtout pour l’éducation musicale de type non-formel il n’existe pas de consensus. Ensuite, je mettrai en relation les deux concepts – i.e. celui des trois aspects de formation musicale et celui de la musique dans la communauté – en donnant des exemples d’une pratique musicale très répandue, à savoir la musique à vent (et/ou chant choral) pour enfin comparer des modèles d’apprentissage musical tels qu’ils existent et sont appliqués dans différents pays européens liés à cette tradition. [less ▲]

Detailed reference viewed: 42 (0 UL)