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See detailIdentity processes in multicultural Antwerp: Report on an ethnographic - cross-cultural study
Stogianni, Maria UL; Van de Vijver, Fons J. R.

Presentation (2018, June 21)

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See detailKulturelle Diversität als ästhetische Innovationsbedingung
Wiegmann, Eva UL

Presentation (2018, June 21)

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See detailOn bisymmetric and quasitrivial operations
Devillet, Jimmy UL

Scientific Conference (2018, June 21)

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See detailMolecular Profiling of Microglia in Steady State and Under Inflammatory Conditions
Sousa, Carole UL

Presentation (2018, June 21)

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See detailA multifold approach to address the security issues of stateful forwarding mechanisms in Information-Centric Networks.
Signorello, Salvatore UL

Doctoral thesis (2018)

Today's Internet dominant usage trends motivate research on more content-oriented future network architectures. Among the emerging future Internet proposals, the promising Information-Centric Networking ... [more ▼]

Today's Internet dominant usage trends motivate research on more content-oriented future network architectures. Among the emerging future Internet proposals, the promising Information-Centric Networking (ICN) research paradigm aims to redesign the Internet's core protocols to promote a shift in focus from hosts to contents. Among the ICN architectures, the Named-Data Networking (NDN) envisions users' named content requests to be forwarded and recorded by their names in routers along the path from one consumer to 1-or-many sources. The Pending Interest Table (PIT) is the NDN's data-plane component which temporarily records forwarded content requests in routers. On one hand, the PIT stateful mechanism enables properties like requests aggregation, multicast responses delivery and native hop-by-hop control flow. On the other hand, the PIT stateful forwarding behavior can be easily abused by malicious users to mount disruptive distributed denial of service attacks (DDoS), named Interest Flooding Attacks (IFAs). In IFAs, loosely coordinated botnets flood the network with a large amount of hard to satisfy requests with the aim to overload both the network infrastructure and the content producers. Countermeasures against IFA have been proposed since the early attack discovery. However, a fair understanding of the defense mechanisms' real efficacy is missing since those have been tested under simplistic assumptions about the evaluation scenarios. Thus, overall, the IFA security threat still appears easy to launch but hard to mitigate. This dissertation work shapes a better understanding of both the implications of IFAs and the possibilities of improving the state-of-the-art defense mechanisms against these attacks. The contributions of this work include the definition of a more complete and realistic attacker model for IFAs, the design of novel stealthy IFAs built upon the proposed attacker model, a re-assessment of the most-efficient state-of-the-art IFA countermeasures against the novel proposed attacks, the theorization and one concrete design of a novel class of IFA countermeasures to efficiently address the novel stealthy IFAs. Finally, this work also seminally proposes to leverage the latest programmable data-plane technologies to design and test alternative forwarding mechanisms for the NDN which could be less vulnerable to the IFA threat. [less ▲]

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See detailL'entretien préliminaire individuel. Une chance négligée pour la résolution constructive du conflit par la médiation.
Mischo-Fleury, Sylvie Monique UL

Doctoral thesis (2018)

Research on emotions and other psychic dimensions is now called upon to play an important role in preventing and resolving conflicts. Knowledge of psychological mechanisms, their normality and the ... [more ▼]

Research on emotions and other psychic dimensions is now called upon to play an important role in preventing and resolving conflicts. Knowledge of psychological mechanisms, their normality and the possibilities of intervening on their distortions in the conflict may contribute to offer answers to the mediator addressing these issues and enhanced skills to handle the face-to-face of a confrontational encounter. We have many years of experience in the treatment of psychopathologies, the regulation of mental dysfunctional mechanisms and their impact on social behaviors and cognitive processes triggered by emotions. During mediation session, if the actors of the litigation come to the negotiating table, it is precisely to address the crucial and highly emotional issues. Our practical experience of mediation, our partnerships with various mediation associations, the exchange with many field mediators, the research that we conducted, led us to think about practical solutions to the need for mediation based on psychology. We drew up a comprehensive review of the scientific literature and chose to set our questioning within the framework of action-research and mediation engineering and using the creative and participative methodology of design thinking. With a team of 7 mediators-users we have decoded, decrypted, the basic data of the psychic dimensions inherent to the conflict (perception, thought, emotion, will and values, behavior and communication). In our professional practice, we have built and experimented a structured matrix of analysis and intervention on the psychic dimensions in the conflict, the metamodel PRECAUCUS, to be used especially in pre-mediation, a restructured and fully integrated phase of the mediation process. An inductive qualitative analysis - in empirical research - enabled us to analyze the date collected during collaborative meetings as well as the benefits of using the first test of the metamodel. The results show the relevance of the solutions proposed both by the know-how and the "savoir-être" gained by the mediator and by the co-construction of the mediator/disputant work, as well as by the fact that psychology is, from now on, the most important fundamental discipline the when it comes to optimizing mediation process and contributing to the future of mediation. [less ▲]

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See detailExploring Multilingual Pedagogies: Forced Migrants’ Learning Experiences in Luxembourg
Kalocsanyiova, Erika UL

Scientific Conference (2018, June 20)

While most societies are structured around diverse flows of people and complex linguistic repertoires, (language) education schemes are still dominated by monolingual instructional practices. This paper ... [more ▼]

While most societies are structured around diverse flows of people and complex linguistic repertoires, (language) education schemes are still dominated by monolingual instructional practices. This paper aims to contribute to current discussions on the affordances of multilingual pedagogies in contexts of forced migration. It draws on a range of linguistic ethnographic data (Copland & Creese, 2015) that was collected over the period of 2016-2017 in diverse settings of language learning and socialization. Our research sites in Luxembourg included language courses in French, English and German, mathematics courses, application and web development training, and diverse leisure activities. Having followed the learning trajectory of five asylum applicants, we explored how they built on their old and newly-acquired language resources. Our findings confirm that in order to make their voices heard, the learners often drew upon elements from multiple languages, including those local languages they had no extensive competence in. This multilingual orientation enabled them to see the local languages as new functional resources in their growing repertoires (Kalocsányiová, 2017). This is of special relevance in contexts of forced migration, where learners need to become users of the languages they are learning from the first day onward. [less ▲]

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See detailCriminal procedural laws across the Union Italian report
Allegrezza, Silvia UL

Report (2018)

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See detailHighway Network Block with Gates Constraints for Training Very Deep Networks
Oyedotun, Oyebade UL; Shabayek, Abd El Rahman UL; Aouada, Djamila UL et al

in 2018 IEEE International Conference on Computer Vision and Pattern Recognition Workshop, June 18-22, 2018 (2018, June 19)

In this paper, we propose to reformulate the learning of the highway network block to realize both early optimization and improved generalization of very deep networks while preserving the network depth ... [more ▼]

In this paper, we propose to reformulate the learning of the highway network block to realize both early optimization and improved generalization of very deep networks while preserving the network depth. Gate constraints are duly employed to improve optimization, latent representations and parameterization usage in order to efficiently learn hierarchical feature transformations which are crucial for the success of any deep network. One of the earliest very deep models with over 30 layers that was successfully trained relied on highway network blocks. Although, highway blocks suffice for alleviating optimization problem via improved information flow, we show for the first time that further in training such highway blocks may result into learning mostly untransformed features and therefore a reduction in the effective depth of the model; this could negatively impact model generalization performance. Using the proposed approach, 15-layer and 20-layer models are successfully trained with one gate and a 32-layer model using three gates. This leads to a drastic reduction of model parameters as compared to the original highway network. Extensive experiments on CIFAR-10, CIFAR-100, Fashion-MNIST and USPS datasets are performed to validate the effectiveness of the proposed approach. Particularly, we outperform the original highway network and many state-ofthe- art results. To the best our knowledge, on the Fashion-MNIST and USPS datasets, the achieved results are the best reported in literature. [less ▲]

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See detailMolArt: a molecular structure annotation and visualization tool
Hoksza, David UL; Gawron, Piotr UL; Ostaszewski, Marek UL et al

in Bioinformatics (2018)

Summary MolArt fills the gap between sequence and structure visualization by providing a light-weight, interactive environment enabling exploration of sequence annotations in the context of available ... [more ▼]

Summary MolArt fills the gap between sequence and structure visualization by providing a light-weight, interactive environment enabling exploration of sequence annotations in the context of available experimental or predicted protein structures. Provided a UniProt ID, MolArt downloads and displays sequence annotations, sequence-structure mapping and relevant structures. The sequence and structure views are interlinked, enabling sequence annotations being color overlaid over the mapped structures, thus providing an enhanced understanding and interpretation of the available molecular data. Availability and implementation MolArt is released under the Apache 2 license and is available at https://github.com/davidhoksza/MolArt. The project web page https://davidhoksza.github.io/MolArt/ features examples and applications of the tool. [less ▲]

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See detailPose Encoding for Robust Skeleton-Based Action Recognition
Demisse, Girum UL; Papadopoulos, Konstantinos UL; Aouada, Djamila UL et al

in CVPRW: Visual Understanding of Humans in Crowd Scene, Salt Lake City, Utah, June 18-22, 2018 (2018, June 18)

Some of the main challenges in skeleton-based action recognition systems are redundant and noisy pose transformations. Earlier works in skeleton-based action recognition explored different approaches for ... [more ▼]

Some of the main challenges in skeleton-based action recognition systems are redundant and noisy pose transformations. Earlier works in skeleton-based action recognition explored different approaches for filtering linear noise transformations, but neglect to address potential nonlinear transformations. In this paper, we present an unsupervised learning approach for estimating nonlinear noise transformations in pose estimates. Our approach starts by decoupling linear and nonlinear noise transformations. While the linear transformations are modelled explicitly the nonlinear transformations are learned from data. Subsequently, we use an autoencoder with L2-norm reconstruction error and show that it indeed does capture nonlinear noise transformations, and recover a denoised pose estimate which in turn improves performance significantly. We validate our approach on a publicly available dataset, NW-UCLA. [less ▲]

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See detailMagnetic SANS is different than nonmagnetic SANS
Michels, Andreas UL

Scientific Conference (2018, June 18)

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See detailLearning around Iconic Buildings. Maps of experience in the making.
Budach, Gabriele UL

in Nichols, Sue (Ed.) Learning Cities - Multimodal explorations and placed pedagogies. (2018)

In this chapter I look at learning and how it unfolds around the engagement with iconic buildings. My observations involve children and adults who I met through a six-year long ethnographic research in a ... [more ▼]

In this chapter I look at learning and how it unfolds around the engagement with iconic buildings. My observations involve children and adults who I met through a six-year long ethnographic research in a bilingual German-Italian primary school program in Frankfurt/Germany. My initial focus during data collection (between 2003 – 2008) was primarily on bi-literacy teaching and learning and rather classic literacy practices involving reading and writing in more than one language. It gradually shifted towards learning, space and a more geo-semiotic perspective (Kress & van Leeuwen 1996, Scollon & Scollon 2003, Nichols 2011, Lou 2014) as I examined how classroom based learning connected with the wider physical and geographical space that made up the social and emotional world of the children and their families. I went back to my data and noticed a variety of activities – a selection of them will be described in more detail below – in which children and adults interacted with buildings and the built environment of the city. At closer examination of this data it became apparent that important social meanings emerged from these encounters. [less ▲]

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See detailNOMA Aided Interference Management for Full-Duplex Self-Backhauling HetNets
Lei, Lei UL; Lagunas, Eva UL; Chatzinotas, Symeon UL et al

in IEEE Communications Letters (2018), 22(8), 1696-1699

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See detailAnti-de Sitter geometry: convex domains, foliations and volume
Tamburelli, Andrea UL

Doctoral thesis (2018)

We study various aspects of the geometry of globally hyperbolic anti-de Sitter 3-manifolds. For manifolds with convex space-like boundaries, homeomorphic to the product of a closed, connected and oriented ... [more ▼]

We study various aspects of the geometry of globally hyperbolic anti-de Sitter 3-manifolds. For manifolds with convex space-like boundaries, homeomorphic to the product of a closed, connected and oriented surface of genus at least two with an interval, we prove that every pair of metrics with curvature less than -1 on the surface can be realised on the two boundary components. For globally hyperbolic maximal compact (GHMC) anti-de Sitter manifolds, we study various geometric quantities, such as the volume, the Hausdorff dimension of the limit set, the width of the convex core and the Holder exponent of the manifold, in terms of the parameters that describe the deformation space of GHMC anti-de Sitter structures. Moreover, we prove existence and uniqueness of a foliation by constant mean curvature surfaces of the domain of dependence of any quasi-circle in the boundary at infinity of anti-de Sitter space. [less ▲]

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See detailThe implementation of Circular Economy policies: A challenge for institutions and practices
Hild, Paula UL

Scientific Conference (2018, June 14)

Since 2014, the Grand Duchy of Luxembourg’s national policy aims at transitioning the national economy from a linear to a circular model. However, we do not know so far how the different socio-economic ... [more ▼]

Since 2014, the Grand Duchy of Luxembourg’s national policy aims at transitioning the national economy from a linear to a circular model. However, we do not know so far how the different socio-economic actors in the country deal with this new political vision. Thus, the overall aim of the CIRCULUX research project is to analyse the effectiveness of the circular economy policy in Luxembourg by studying institutions and practices in businesses. In this way, we follow authors who claim for the systematic inclusion of institutions into the analysis of policy effectiveness (Glückler and Lenz, 2016). We assume that institutions explain sectoral differences in the efficacy of circular economy policies, in analogy to Bathelt and Glückler (2014) who state that in a comparative study, institutions enable to clarify regional differences. Focusing on two different industries, the building sector and the automotive supply industry, we hope to explore the variety of circular economy practices, and therefore as well theoretical and pragmatic implications between the United Nations Sustainable Development Goals 9 (Industry, Innovation, and Infrastructure) and 12 (Responsible Consumption and Production). The research follows a qualitative research approach, including documentary analysis, up to 20 exploratory and around 50 semi-structured expert interviews. We intend to capture different dimensions of the motivations and barriers of companies for shifting towards circularity, by triangulation of these three datasets. In the analysis of data, we consider different levels and emphasise on three points highlighted by various authors for a need for further consideration. The first aspect focus on the socio-cultural specificities of Luxembourg and related challenges for the implementation of a circular economy (e.g., the mix of technical standards, multilingualism, corporate cultures). The second aspect covers the internal dynamics of actor networks and hybrid organisations that aim to bring circular economy theory into practice (Schulz and Preller, 2016). Moreover, the third aspect deals with the articulation between sustainability effectiveness and the cost from the perspectives of various stakeholders (Ruparathna and Hewage, 2015). The preliminary results put forward the interdependence of the actors’ perception of what would mean a circular economy model for Luxembourg. They also reveal the firm’s specific role in this system. The decision of a business actor to implement a circular economy practice depends primarily on its return on investment, the general regulatory pressure and the maturity of the industry and the company. In general, the hindrance for circularity is not the absence of a technological or technical solution. Interviews with experts from the business sector reveal that notably economic factors are hindering circularity in companies. Besides, the maturity of the firm given its awareness for concepts like the circular economy, sustainable development, or sustainability shapes its vision for the future in this field actively. As a push for action, interviewees suggested a regulatory framework for circularity. [less ▲]

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See detailFundamental limits to helical edge conductivity due to sphin-phonon scattering
Groenendijk, Solofo UL; Dolcetto; Schmidt, Thomas UL

in Physical Review. B, Condensed Matter (2018), 97

Detailed reference viewed: 31 (4 UL)