Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
See detailMultiphysics applications and computational challenges
Zilian, Andreas UL

Scientific Conference (2017, January 24)

Detailed reference viewed: 69 (4 UL)
Full Text
Peer Reviewed
See detailMultiple Access Relaying with Network Coding: Iterative Network/Channel Decoding with Imperfect CSI
Vu, Thang Xuan UL; Di Renzo, Marco; Duhamel, Pierre

in EURASIP Journal on Advances in Signal Processing (2013), 170

Detailed reference viewed: 37 (1 UL)
Full Text
Peer Reviewed
See detailMultiple Access Techniques for Next Generation Wireless: Recent Advances and Future Perspectives
Sharma, Shree Krishna UL; Patwary, Mohammad; Chatzinotas, Symeon UL

in EAI Endorsed Transactions on Wireless Spectrum (2016), 2(7),

The advances in multiple access techniques has been one of the key drivers in moving from one cellular generation to another. Starting from the first generation, several multiple access techniques have ... [more ▼]

The advances in multiple access techniques has been one of the key drivers in moving from one cellular generation to another. Starting from the first generation, several multiple access techniques have been explored in different generations and various emerging multiplexing/multiple access techniques are being investigated for the next generation of cellular networks. In this context, this paper first provides a detailed review on the existing Space Division Multiple Access (SDMA) related works. Subsequently, it highlights the main features and the drawbacks of various existing and emerging multiplexing/multiple access techniques. Finally, we propose a novel concept of clustered orthogonal signature division multiple access for the next generation of cellular networks. The proposed concept envisions to employ joint antenna coding in order to enhance the orthogonality of SDMA beams with the objective of enhancing the spectral efficiency of future cellular networks. [less ▲]

Detailed reference viewed: 215 (39 UL)
Full Text
Peer Reviewed
See detailMultiple crack detection in 3D using a stable XFEM and global optimization
Agathos, Konstantinos; Chatzi, Eleni; Bordas, Stéphane UL

in Computational Mechanics (2018)

A numerical scheme is proposed for the detection of multiple cracks in three dimensional (3D) structures. The scheme is based on a variant of the extended finite element method (XFEM) and a hybrid ... [more ▼]

A numerical scheme is proposed for the detection of multiple cracks in three dimensional (3D) structures. The scheme is based on a variant of the extended finite element method (XFEM) and a hybrid optimizer solution. The proposed XFEM variant is particularly well-suited for the simulation of 3D fracture problems, and as such serves as an efficient solution to the so-called forward problem. A set of heuristic optimization algorithms are recombined into a multiscale optimization scheme. The introduced approach proves effective in tackling the complex inverse problem involved, where identification of multiple flaws is sought on the basis of sparse measurements collected near the structural boundary. The potential of the scheme is demonstrated through a set of numerical case studies of varying complexity. [less ▲]

Detailed reference viewed: 119 (7 UL)
Full Text
Peer Reviewed
See detailMultiple Cracks Interactions in Stress Corrosion Cracking: In Situ Observation by Digital Image Correlation and Phase Field Modeling
Bolivar, J.; Nguyen, Thanh Tung UL; Shi, Y. et al

in Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors (2018)

Detailed reference viewed: 35 (2 UL)
Full Text
Peer Reviewed
See detailMultiple Decision Feedback Equalizer for Satellite AIS Coherent detection
Gallardo, Jurado UL; Sorger, Ulrich UL; Angeles, Maria

in Multiple Decision Feedback Equalizer for Satellite AIS Coherent detection (2010)

Detailed reference viewed: 107 (0 UL)
Full Text
Peer Reviewed
See detailMultiple edges in M. Kontsevich's graph complexes and computations of the dimensions and Euler characteristics
Willwacher, Thomas; Zivkovic, Marko UL

in Advances in Mathematics (2015), 272

We study the cohomology of complexes of ordinary (non- decorated) graphs, introduced by M. Kontsevich. We construct spectral sequences converging to zero whose first page contains the graph cohomology. In ... [more ▼]

We study the cohomology of complexes of ordinary (non- decorated) graphs, introduced by M. Kontsevich. We construct spectral sequences converging to zero whose first page contains the graph cohomology. In particular, these spectral sequences may be used to show the existence of an infinite series of previously unknown and provably non-trivial cohomology classes, and put constraints on the structure of the graph cohomology as a whole. [less ▲]

Detailed reference viewed: 59 (2 UL)
Full Text
Peer Reviewed
See detailMultiple Gateway Transmit Diversity in Q/V Band Feeder Links
Gharanjik, Ahmad UL; Shankar, Bhavani UL; Arapoglou, Pantelis-Daniel et al

in IEEE Transactions on Communications (2015)

Design of high bandwidth and reliable feeder links is central towards provisioning new services on the user link of a multibeam satellite communication (SatCom) system. Towards this, utilization of the Q ... [more ▼]

Design of high bandwidth and reliable feeder links is central towards provisioning new services on the user link of a multibeam satellite communication (SatCom) system. Towards this, utilization of the Q/V band and an exploitation of multiple gateways (GW) as a transmit diversity measure for overcoming severe propagation effects are being considered. In this context, this contribution deals with the design of a feeder link comprising N + P GWs (N active and P redundant GWs). Towards provisioning the desired availability, a novel switching scheme is analysed and practical aspects such as prediction based switching and switching rate are discussed. Unlike most relevant works, a dynamic rain attenuation model is used to derive analytically average outage probability in the fundamental 1 + 1 gateway case. Building on this result, an analysis for the N +P scenario leading to a quantification of the end􀀀to􀀀end performance is provided. This analysis aids system sizing by illustrating the interplay between the number of active and redundant gateways on the chosen metrics : average outage and average switching rate. [less ▲]

Detailed reference viewed: 236 (41 UL)
Full Text
Peer Reviewed
See detailThe Multiple Geographies of Early Childhood Education and Care: An Ethnographic Approach to the Places and Spaces of Young Children’s Care Arrangements
Bollig, Sabine UL

in Bollig, Sabine; Honig, Michael-Sebastian; Neumann, Sascha (Eds.) et al MultiPluriTrans in Educational Ethnography. Approaching the Multimodality, Plurality and Translocality of Educational Realities (2015)

This contribution demonstrates how child-centred research on day-care childhoods could benefit from ethnographic research strategies that include a wider and more fluid understanding of the field. This ... [more ▼]

This contribution demonstrates how child-centred research on day-care childhoods could benefit from ethnographic research strategies that include a wider and more fluid understanding of the field. This topic is discussed on the basis of the on-going research project CHILD that is currently conducted at the University of Luxembourg. The article presents the context and objectives of the study and shows how the research questions are transformed into a multi-sited research design that investigates the genesis, conditions, and everyday conduct of the care arrangements for 2-4-year-olds as an interplay of certain time-space geographies of early childhood education and care. Those time-space geographies represent a methodical and analytical construct, which helps to reveal how child-care policies, local structures and affordances, parents’ beliefs and choices, institutional orders and children’s activities interplay and assemble in the everyday making of their day-care childhoods. This particular assemblage is how we understand care arrangements. How this conception on practiced care arrangements is worked out gets demonstrated on examples from the on-going field research. According to results from three ethnographic case studies, the diverse places and spaces which come into play in the localised interconnections of day-care practices of 2-4-year-olds are highlighted and discussed with regard to the question of how such multi-sited ethnographic research strategies can help to overcome the traditional notion of children as ‘colonisers of small places’. [less ▲]

Detailed reference viewed: 175 (9 UL)
Peer Reviewed
See detailThe multiple geographies of ECEC - Care arrangements from the 'vantage point' of children
Bollig, Sabine UL

Scientific Conference (2013, November 22)

Detailed reference viewed: 23 (1 UL)
Peer Reviewed
See detailMultiple Inklusionen von Russlanddeutschen: Transmigration als Karriere.
Schmitz, Anett UL

in Uerlings, Herbert; Patrut, Iulia-Karin (Eds.) Inklusion/Exklusion und Kultur. (2013)

Detailed reference viewed: 81 (1 UL)
Peer Reviewed
See detailMultiple integral representation for functionals of Dirichlet processes
Peccati, Giovanni UL

in Bernoulli (2008), 14(1), 91--124

Detailed reference viewed: 66 (0 UL)
Full Text
Peer Reviewed
See detailMultiple levels of letter representation in written spelling: evidence from a single case of dysgraphia with multiple deficits.
de Partz, Marie-Pierre; Lochy, Aliette UL; Pillon, Agnesa

in Behavioural neurology (2005), 16(2-3), 119-44

In this paper, we report a detailed analysis of the impaired performance of a dysgraphic individual, AD, who produced similar rates of letter-level errors in written spelling, oral spelling, and typing ... [more ▼]

In this paper, we report a detailed analysis of the impaired performance of a dysgraphic individual, AD, who produced similar rates of letter-level errors in written spelling, oral spelling, and typing. We found that the distribution of various letter error types displayed a distinct pattern in written spelling on the one hand and in oral spelling and typing on the other. In particular, noncontextual letter substitution errors (i.e., errors in which the erroneous letter that replaces the target letter does not occur elsewhere within the word) were virtually absent in oral spelling and typing and mainly found in written spelling. In contrast, letter deletion errors and multiple-letter errors were typically found in oral spelling and very exceptional in written spelling. Only contextual letter substitution errors (i.e., errors in which the erroneous letter that replaces the target letter is identical to a letter occurring earlier or later in the word) were found in similar proportions in the three tasks. We argue that these contrasting patterns of letter error distribution result from damage to two distinct levels of letter representation and processing within the spelling system, namely, the amodal graphemic representation held in the graphemic buffer and the letter form representation computed by subsequent writing-specific processes. Then, we examined the relationship between error and target in the letter substitution errors produced in written and oral spelling and found evidence that distinct types of letter representation are processed at each of the hypothetized levels of damage: symbolic letter representation at the graphemic level and representation of the component graphic strokes at the letter form processing level. [less ▲]

Detailed reference viewed: 2 (0 UL)
Full Text
Peer Reviewed
See detailMultiple phases of Cu2ZnSnSe4 detected by room temperature photoluminescence
Djemour, Rabie UL; Redinger, Alex UL; Mousel, Marina UL et al

in Journal of Applied Physics (2014), 116

Detailed reference viewed: 120 (7 UL)
Full Text
Peer Reviewed
See detailMultiple phases of Cu2ZnSnSe4 detected by room temperature photoluminescence (vol 116, 073509, 2014)
Djemour, Rabie; Redinger, Alex UL; Mousel, Marina et al

in JOURNAL OF APPLIED PHYSICS (2015), 118(8),

Detailed reference viewed: 44 (1 UL)
Peer Reviewed
See detailMultiple reasons for an inefficient STAT1 response upon IL-6-type cytokine stimulation
Haan, Serge UL; Keller, J. F.; Behrmann, Iris UL et al

in Cellular Signalling (2005), 17(12), 1542-50

IL-6-type cytokines play an important role during inflammation and the immune response. In addition, they are involved in haematopoiesis, liver and neuronal regeneration, embryonic development and ... [more ▼]

IL-6-type cytokines play an important role during inflammation and the immune response. In addition, they are involved in haematopoiesis, liver and neuronal regeneration, embryonic development and fertility. We found that IL-6-type cytokine stimulation of cell lines and primary human macrophages results in a different distribution of the DNA-binding competent STAT dimer species in the cytosol and nucleus as demonstrated by electrophoretic mobility shift assays. In the absence of detergent, STAT3/STAT3, STAT1/STAT3 were the predominant species in the cytoplasm while STAT3/STAT3 was predominant in the nucleus. However, in detergent containing total cellular lysates and nuclear fractions prepared with detergent containing buffers, the STAT1/STAT1 homodimer was as prominent or even more prominent than STAT3/STAT3 and STAT1/STAT3. We were interested in the cause of this discrepancy since STAT1-regulated genes have not been described to be expressed upon IL-6-type cytokine stimulation. In addition to the more transient STAT1 activation, IL-6-type cytokines such as IL-6 and OSM lead to a much less efficient STAT1 activation compared to the potent STAT1 activators IFNgamma and IFNalpha. Studies with STAT1-deficient cells revealed that STAT1 activation does not seem to be an important competitive process to STAT3 activation arguing again for a very inefficient STAT1 activation upon IL-6-type cytokine stimulation. We also describe that pY-STAT3 is much more efficiently shuttled into the nucleus than pY-STAT1. [less ▲]

Detailed reference viewed: 63 (2 UL)
Full Text
Peer Reviewed
See detailMultiple Sets Exponential Concentration and Higher Order Eigenvalues
Gozlan, Nathael; Herry, Ronan UL

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: 49 (4 UL)