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See detailIntersymbol and Intercarrier Interference in OFDM Systems: Unified Formulation and Analysis
Cruz–Roldán, Fernando; Alves Martins, Wallace UL; García, Fausto G. et al

E-print/Working paper (2020)

A unified matrix formulation is presented for the analysis of intersymbol and intercarrier interference in orthogonal frequency-division multiplexing (OFDM) systems. The proposed formulation relies on six ... [more ▼]

A unified matrix formulation is presented for the analysis of intersymbol and intercarrier interference in orthogonal frequency-division multiplexing (OFDM) systems. The proposed formulation relies on six parameters and allows studying various schemes, including those with windowing in the transmitter and/or in the receiver (called windowed OFDM systems), which may add cyclic suffix and/or cyclic prefix (CP), besides the conventional CP-OFDM. The proposed framework encompasses seven different OFDM systems. It considers the overlap-and-add procedure performed in the transmitter of windowed OFDM systems, being jointly formulated with the channel convolution. The intersymbol and intercarrier interference, caused when the order of the channel impulse response is higher than the number of CP samples, is characterized. A new equivalent channel matrix that is useful for calculating both the received signal and the interference power is defined and characterized. Unlike previous works, this new channel matrix has no restrictions on the length of the channel impulse response, which means that the study is not constrained to the particular case of two or three data blocks interfering in the received signal. Theoretical expressions for the powers of three different kinds of interference are derived. These expressions allow calculating the signal-to-interference-plus-noise ratio, useful for computing the data rate of each OFDM system. The proposed formulation is applied to realistic examples, showing its effectiveness through comparisons based on numerical performance assessments of the considered OFDM systems. [less ▲]

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See detailIntersymbol and Intercarrier Interference in OFDM Transmissions Through Highly Dispersive Channels
Alves Martins, Wallace UL; Cruz-Roldán, Fernando; Moonen, Marc et al

in Proc. of the 27th European Signal Processing Conference (EUSIPCO-2019) (2019, September)

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See detailIntertemporal Material Deprivation
D'Ambrosio, Conchita UL; Bossert, Walter; Ceriani, Lidia et al

in Betti, Gianni; Lemmi, Achille (Eds.) Poverty and Social Exclusion (2014)

Individual well-being is multidimensional and various aspects of the quality of life need to be jointly considered in its measurement. The literature on the subject has proposed many indices of ... [more ▼]

Individual well-being is multidimensional and various aspects of the quality of life need to be jointly considered in its measurement. The literature on the subject has proposed many indices of multidimensional poverty and deprivation and explored the properties that are at the basis of these measures. The purpose of this chapter is to add intertemporal considerations to the analysis of material deprivation. We employ the EU-SILC panel data set, which includes information on different aspects of well-being over time. EU countries are compared based on measures that take this additional intertemporal information into consideration. If we follow the path of material deprivation experienced by each individual over time we obtain a picture which differs from the annual results. Since the measurement of material deprivation is used by the EU member states and the European Commission to monitor national and EU progress in the fight against poverty and social exclusion, our results suggest that time cannot be neglected. Countries should not only be compared based on their year by year results but additional information is gained by following individuals over time and producing an aggregate measure once time is taken into account. [less ▲]

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See detailIntertemporal material deprivation: a proposal and an application to EU countries
D'Ambrosio, Conchita UL; Bossert, Walter

in Dasgupta, Indraneel; Mitra, Manipushpak (Eds.) Deprivation, Inequality and Polarization: Essays in Honour of Satya Ranjan Chakravarty (2019)

This paper analyzes the effects of the inclusion of past experiences in measuring current material deprivation. The method followed generalizes the proposal of Bossert, Ceriani, Chakravarty and D'Ambrosio ... [more ▼]

This paper analyzes the effects of the inclusion of past experiences in measuring current material deprivation. The method followed generalizes the proposal of Bossert, Ceriani, Chakravarty and D'Ambrosio (2014) by adapting the class of indices on the measurement of poverty over time of Dutta, Roope and Zank (2013). An application to the analysis of material deprivation within EU countries is then provided. Following the path of material deprivation experienced by each individual over time yields a picture which differs from that in the annual results. Since the measurement of material deprivation is used by the EU member states and the European Commission to monitor national and EU progress in the fight against poverty and social exclusion, the results suggest that time cannot be neglected. Countries should not only be compared based on their year-by-year results, but additional information is gained by following individuals over time and producing an aggregate measure once dynamic considerations are taken into consideration. [less ▲]

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See detailIntertemporal pro-poorness
Palmisano, Flaviana UL; Bresson, Florent; Duclos, Jean-Yves

E-print/Working paper (2015)

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See detailINTERTWINED DESTINIES & STRENGTHENED TIES: “A COLÔNIA LUXEMBURGUESA”. A PARTICIPATORY TRANSMEDIA PROJECT ON STEEL-FRAMED MIGRATION FROM LUXEMBOURG TO BRAZIL (1921-2022)
Santana, Dominique UL

Doctoral thesis (2022)

A Colônia Luxemburguesa unveils a century of steel-framed migration between Luxembourg and Brazil. This transmedia documentary delves into intersecting stories from different angles and across different ... [more ▼]

A Colônia Luxemburguesa unveils a century of steel-framed migration between Luxembourg and Brazil. This transmedia documentary delves into intersecting stories from different angles and across different platforms – an interactive and participatory experience to draw a multifaceted portrait of a curious Colônia forged by steel. www.colonia.lu [less ▲]

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See detailThe intertwined metabolism during symbiotic nitrogen fixation elucidated by metabolic modelling
Pfau, Thomas UL; Christian, Nils UL; Masakapalli, Shyam K. et al

in Scientific Reports (2018), 8

Genome-scale metabolic network models can be used for various analyses including the prediction of metabolic responses to changes in the environment. Legumes are well known for their rhizobial symbiosis ... [more ▼]

Genome-scale metabolic network models can be used for various analyses including the prediction of metabolic responses to changes in the environment. Legumes are well known for their rhizobial symbiosis that introduces nitrogen into the global nutrient cycle. Here, we describe a fully compartmentalised, mass and charge-balanced, genome-scale model of the clover Medicago truncatula, which has been adopted as a model organism for legumes. We employed flux balance analysis to demonstrate that the network is capable of producing biomass components in experimentally observed proportions, during day and night. By connecting the plant model to a model of its rhizobial symbiont, Sinorhizobium meliloti, we were able to investigate the effects of the symbiosis on metabolic fluxes and plant growth and could demonstrate how oxygen availability influences metabolic exchanges between plant and symbiont, thus elucidating potential benefits of inter organism amino acid cycling. We thus provide a modelling framework, in which the interlinked metabolism of plants and nodules can be studied from a theoretical perspective. [less ▲]

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See detailIntertwining distant reading of web archives and oral histories of the COVID crisis
Schafer, Valerie UL

Scientific Conference (2021, September 22)

Detailed reference viewed: 26 (2 UL)
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See detailIntertwining operators of the quantum Teichmüller space
Mazzoli, Filippo UL

E-print/Working paper (2016)

Detailed reference viewed: 165 (24 UL)
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See detailIntervals of the homomorphism order of graphs have infinite width
Lehtonen, Erkko; Schölzel, Karsten UL

E-print/Working paper (2014)

The homomorphism order of graphs is known to be dense with a single exception. We strengthen this result by showing that, with this single exception, the interval between any two distinct comparable ... [more ▼]

The homomorphism order of graphs is known to be dense with a single exception. We strengthen this result by showing that, with this single exception, the interval between any two distinct comparable graphs includes an infinite antichain. Moreover, every antichain included in such an interval can be extended into an infinite one within that interval. [less ▲]

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See detailIntervention ergonomique chez Saint-Gobain PAM: Apports de la démarche participative au développement de la santé et de la sécurité au travail
Lallemand, Carine UL

Bachelor/master dissertation (2008)

Ce mémoire présente ma mission, en tant que psychologue ergonome, de coordination de groupes de travail dans le cadre d’un challenge santé-sécurité s’inscrivant dans une démarche essentiellement ... [more ▼]

Ce mémoire présente ma mission, en tant que psychologue ergonome, de coordination de groupes de travail dans le cadre d’un challenge santé-sécurité s’inscrivant dans une démarche essentiellement participative. Les groupes présentés ici à titre d’illustration sont ceux qui sont en lien direct avec l’ergonomie ou la psychologie du travail. Une étude complémentaire, présentée comme une réflexion sur la pratique de l’ergonome et s’intéressant particulièrement aux contributions d’une démarche participative à la promotion de la santé et de la sécurité au travail, servira de toile de fond à ce dossier. [less ▲]

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See detailIntervention ergonomique et conception : quelle(s) activité(s) analyser ?
Querelle, Léonard; Pignault, Anne UL

Scientific Conference (2009, September)

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See detailIntervention strategies to improve the quality of teachers´ judgments: Changes in the accuracy of teachers´ transition decisions
Pit-Ten Cate, Ineke UL; Krolak-Schwerdt, Sabine UL; Hörstermann, Thomas UL et al

Scientific Conference (2017, August 30)

This paper focuses on intervention modules to improve teachers’ diagnostic competence, especially in regards to decisions on students’ transition from primary to secondary education. Although these ... [more ▼]

This paper focuses on intervention modules to improve teachers’ diagnostic competence, especially in regards to decisions on students’ transition from primary to secondary education. Although these transition decisions should be based on academic achievement, research has shown non-academic variables to influence decisions, leading to disadvantages for specific groups of students. Using an experimental pre-post design, we investigated the short and long term effects of accountability, theoretical knowledge and the application of prediction rules on teachers’ judgment accuracy, respectively. Pre-intervention data showed that although teachers’ decision accuracy was of high standard, decision accuracy for ethnic majority students was significantly higher than for ethnic minority students. Increased accountability resulted in increased decision accuracy, especially in regards to decisions for ethnic minority students. Similarly, the introduction of theoretical models of decision making and judgment formation and the application of prediction rules also resulted in an improvement of transition decisions but only for ethnic minority students. Unfortunately, the differential intervention effects of the intervention modules could not be maintained over time, that is, at follow up, the ethnicity bias reappeared. From these studies we can conclude that all three intervention modules can improve the accuracy of teachers’ transition decisions. In line with the intention of the interventions, the disproportionally high rate of decision errors for ethnic minority students observed pre-intervention was eliminated post-intervention and in line with error rates for ethnic majority students. However, training or instruction should be repeated briefly before making such judgments as their influence was not maintained over time. [less ▲]

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See detailInterventionen bei selbstverletzendem Verhalten (SVV).
Limbach-Reich, Arthur UL

in Nussbeck, Susanne; Biermann, Adrienne; Adam, Heidemarie (Eds.) Sonderpädagogik der Geistigen Entwicklung (2008)

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See detailInterventions à domicile pour renforcer le soutien parental dans les apprentissages scolaires des jeunes enfants : les enjeux méthodologiques et éthiques.
Poncelet, Débora UL; De Chambrier, Anne-Françoise; Tinnes-Vigne, Mélanie et al

Presentation (2019, November)

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See detailInterventions addressing subjective well-being in ageing: Promissing approaches on individual and societal level
Boll, Thomas UL; Ferring, Dieter UL

Poster (2016, June)

Subjective well-being (SWB) in aging is important not only as an indicator of positive aging, but also because of its effects on relevant outcomes for the person (e.g., health) and the community (e.g ... [more ▼]

Subjective well-being (SWB) in aging is important not only as an indicator of positive aging, but also because of its effects on relevant outcomes for the person (e.g., health) and the community (e.g., involvements). This raises the question of how SWB of older people can be improved through interventions. Our contribution focusses on three domains for improving SWB: Optimization of resources (e.g., financial situation, autonomy), help with critical life events (e.g., widowhood, disablement), and support at the end of life. We consider reasons for optimizing SWB in these areas as well as the theoretical and empirical foundation for interventions. Among them are (1) bottom-up approaches regarding the link between domain-specific SWB (e.g., regarding health, financial situation, social relationships) and global SWB, (2) Coping approaches to critical life events frequently occuring in old age (e.g., widowhood, disablement) and (3) research on terminal decline of SWB. Against this background principal possibilities of optimizing SWB in these domains are delineated and both individual and societal (e.g., communal, national) level interventions are described. [less ▲]

Detailed reference viewed: 166 (11 UL)