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See detailDeep dive into Interledger: Understanding the Ripple ecosystem - Part 2
Trestioreanu, Lucian Andrei UL; Cassagnes, Cyril UL; State, Radu UL

Learning material (2019)

The goal of Interledger is to create an international friction-less payments routing system. The Interledger protocol is literally a protocol for inter-ledger payments. To achieve this goal, several ... [more ▼]

The goal of Interledger is to create an international friction-less payments routing system. The Interledger protocol is literally a protocol for inter-ledger payments. To achieve this goal, several aspects of the technology require a deeper analysis. For this reason, we created our own test-bed on our premises. By doing so, we notice that some aspects are well documented but we found that others might need more attention and clarification. Despite a large community effort, the task to keep information on a fast evolving software ecosystem is tedious and not always the priority for such a project. Therefore, the purpose of the following document is to consolidate all the relevant information to create a test-bed for the Interledger protocol between Ripple and Ethereum. [less ▲]

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See detailThe dual volume of quasi-Fuchsian manifolds and the Weil-Petersson distance
Mazzoli, Filippo UL

E-print/Working paper (2019)

Making use of the dual Bonahon-Schläfli formula, we prove that the dual volume of the convex core of a quasi-Fuchsian manifold M is bounded by an explicit constant, depending only on the topology of M ... [more ▼]

Making use of the dual Bonahon-Schläfli formula, we prove that the dual volume of the convex core of a quasi-Fuchsian manifold M is bounded by an explicit constant, depending only on the topology of M, times the Weil-Petersson distance between the hyperbolic structures on the upper and lower boundary components of the convex core of M. [less ▲]

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Peer Reviewed
See detailFacial perception and implicit prejudice: An eye-tracking study
Stogianni, Maria UL; Murdock, Elke UL

Poster (2019, July 09)

Racial bias can affect the way of processing visual stimuli that are targets of prejudice. Different levels of prejudice and the type of prejudice (implicit vs. explicit) were related to automatic and ... [more ▼]

Racial bias can affect the way of processing visual stimuli that are targets of prejudice. Different levels of prejudice and the type of prejudice (implicit vs. explicit) were related to automatic and controlled processes of visual exploration (Hansen Rakhshan, Ho, & Pannasch, 2015). The proposed study aims to extend these findings by including pictures of individuals that belong to different racial and ethnic groups (White, Asian, Black, Latino) and vary in prototypical characteristics. Images of the Chicago Face Database will be presented in an online study. Eye movements will be recorded during the presentation of visual stimuli. We will examine differences in exploratory looking behavior among natives in a western European country and individuals with migratory background. [less ▲]

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See detailWHY IS THE MARKET SKEWNESS-RETURN RELATIONSHIP NEGATIVE?
Lehnert, Thorsten UL

Scientific Conference (2019, July 09)

Detailed reference viewed: 80 (7 UL)
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See detailWhy we do not care for statelessness as we care for asylum?
Sommarribas, Adolfo UL

Presentation (2019, July 07)

This presentation address the issue why statelessness is so marginalised in the migration discourse in the European Union even though is a growing phenomenon.

Detailed reference viewed: 35 (1 UL)
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See detailNation et migrations au Luxembourg
Scuto, Denis UL

Article for general public (2019)

This article focusses on the making of the nation and migrations in Luxembourg in 19th and 20th century, in a double perspective: Luxembourg nation as a product of transregional and transnational spaces ... [more ▼]

This article focusses on the making of the nation and migrations in Luxembourg in 19th and 20th century, in a double perspective: Luxembourg nation as a product of transregional and transnational spaces of migration and nation as the lens of observation of these migrations. [less ▲]

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Peer Reviewed
See detailNamenskunde – Gender(re)konstruktionen in Autobiographien von Transpersonen
Artuso, Sandy Kathy UL

Scientific Conference (2019, July 05)

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See detailMaking Retail Banks Resolvable
Asimakopoulos, Ioannis UL

Presentation (2019, July 05)

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See detailInnovation et coopération dans les réseaux de données (années 1970-1990)
Schafer, Valerie UL

Presentation (2019, July 04)

A travers un parcours historique au coeur de 20 ans d'innovation dans les réseaux de données, depuis le développement d'Arpanet jusqu'à l'échec de l'OSI, en passant par Internet, XNS, Transpac ou encore ... [more ▼]

A travers un parcours historique au coeur de 20 ans d'innovation dans les réseaux de données, depuis le développement d'Arpanet jusqu'à l'échec de l'OSI, en passant par Internet, XNS, Transpac ou encore EIN, il s'agira d'interroger la place de la coopération technique mais aussi organisationnelle au sein des réseaux de données. Trop ou pas assez de coopération tue-t-il l'innovation? [less ▲]

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See detailInsights into protein structural, physicochemical, and functional consequences of missense variants in 1,330 disease-associated human genes 693259
Iqbal, Sumaiya; Jespersen, Jakob B.; Perez-Palma, Eduardo et al

E-print/Working paper (2019)

Inference of the structural and functional consequences of amino acid-altering missense variants is challenging and not yet scalable. Clinical and research applications of the colossal number of ... [more ▼]

Inference of the structural and functional consequences of amino acid-altering missense variants is challenging and not yet scalable. Clinical and research applications of the colossal number of identified missense variants is thus limited. Here we describe the aggregation and analysis of large-scale genomic variation and structural biology data for 1,330 disease-associated genes. Comparing the burden of 40 structural, physicochemical, and functional protein features of altered amino acids with 3-dimensional coordinates, we found 18 and 14 features that are associated with pathogenic and population missense variants, respectively. Separate analyses of variants from 24 protein functional classes revealed novel function-dependent vulnerable features. We then devised a quantitative spectrum, identifying variants with higher pathogenic variant-associated features. Finally, we developed a web resource (MISCAST; http://miscast.broadinstitute.org/) for interactive analysis of variants on linear and tertiary protein structures. The biological impact of missense variants available through the webtool will assist researchers in hypothesizing variant pathogenicity and disease trajectories. [less ▲]

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See detailRobotic Trajectory Tracking: Position- and Force-Control
Klecker, Sophie UL

Doctoral thesis (2019)

This thesis employs a bottom-up approach to develop robust and adaptive learning algorithms for trajectory tracking: position and torque control. In a first phase, the focus is put on the following of a ... [more ▼]

This thesis employs a bottom-up approach to develop robust and adaptive learning algorithms for trajectory tracking: position and torque control. In a first phase, the focus is put on the following of a freeform surface in a discontinuous manner. Next to resulting switching constraints, disturbances and uncertainties, the case of unknown robot models is addressed. In a second phase, once contact has been established between surface and end effector and the freeform path is followed, a desired force is applied. In order to react to changing circumstances, the manipulator needs to show the features of an intelligent agent, i.e. it needs to learn and adapt its behaviour based on a combination of a constant interaction with its environment and preprogramed goals or preferences. The robotic manipulator mimics the human behaviour based on bio-inspired algorithms. In this way it is taken advantage of the know-how and experience of human operators as their knowledge is translated in robot skills. A selection of promising concepts is explored, developed and combined to extend the application areas of robotic manipulators from monotonous, basic tasks in stiff environments to complex constrained processes. Conventional concepts (Sliding Mode Control, PID) are combined with bio-inspired learning (BELBIC, reinforcement based learning) for robust and adaptive control. Independence of robot parameters is guaranteed through approximated robot functions using a Neural Network with online update laws and model-free algorithms. The performance of the concepts is evaluated through simulations and experiments. In complex freeform trajectory tracking applications, excellent absolute mean position errors (<0.3 rad) are achieved. Position and torque control are combined in a parallel concept with minimized absolute mean torque errors (<0.1 Nm). [less ▲]

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See detailMapping Digital Urban History - Use Case Luxembourg
Kass, Steve UL; Pauli, Sebastian; Uhrmacher, Martin UL

Presentation (2019, July 04)

Since 2016, a research project of the University of Luxembourg (IHIST: Institute for History) in close collaboration with the city of Luxemburg is investigating research in the development of an ... [more ▼]

Since 2016, a research project of the University of Luxembourg (IHIST: Institute for History) in close collaboration with the city of Luxemburg is investigating research in the development of an interactive, dynamic web site, providing insights in the urban development since the beginning of the 19th century at single building level scale. The elaborated historic town Atlas represents a collection of maps and structures (e.g. building, fortress, streets) combined with explanatory texts, chronological tables and images, which all trace the history of the city and illustrate its stages of development. It represents a tool for additional new knowledge with which the historical process of change will be documented diachronically. The target groups are international urban history research and general public. [less ▲]

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See detailConsolidated democracy advantage: political instability and sovereign spreads in the EU
Glaurdic, Josip UL; Lesschaeve, Christophe UL; Vizek, Maruška

in Comparative European Politics (2019), Online first

We expose the way the market evaluates internal political risk and instability in democratic polities by analysing the determinants of sovereign spreads of EU member states over the course of the past two ... [more ▼]

We expose the way the market evaluates internal political risk and instability in democratic polities by analysing the determinants of sovereign spreads of EU member states over the course of the past two decades. Our analysis builds on the “democratic advantage” argument which suggests democracies enjoy preferential treatment on the international market of sovereign debt because of their better ability to make credible commitments. We suggest that, when it comes to the market’s evaluation of internal political instability and risk in democratic polities, there actually exists a “consolidated democracy advantage”. In times of political instability, older and more consolidated democracies pay less of a premium on their debt than their younger and less consolidated counterparts. In other words, the market indeed views the commitment of consolidated democracies with long track records of democratic competition and survival as something qualitatively diferent than the commitment of new democracies with short track records. [less ▲]

See detailLes fonctions des parlements en démocratie aujourd’hui : quid de la représentation des minorités ?
Poirier, Philippe UL

Presentation (2019, July 02)

Les mécanismes des représentations parlementaires des minorités prévus dans les Etats membres de l’UE garantissent-ils les droits des citoyens qui les constituent et préservent-ils leurs chances d’exercer ... [more ▼]

Les mécanismes des représentations parlementaires des minorités prévus dans les Etats membres de l’UE garantissent-ils les droits des citoyens qui les constituent et préservent-ils leurs chances d’exercer les fonctions politiques primordiales ? [less ▲]

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See detailDeep dive into Interledger: Understanding the Ripple ecosystem - Part 1
Trestioreanu, Lucian Andrei UL; Cassagnes, Cyril UL; State, Radu UL

Learning material (2019)

The goal of Interledger is to create an international friction-less payments routing system. The Interledger protocol is literally a protocol for inter-ledger payments. To achieve this goal, several ... [more ▼]

The goal of Interledger is to create an international friction-less payments routing system. The Interledger protocol is literally a protocol for inter-ledger payments. To achieve this goal, several aspects of the technology require a deeper analysis. For this reason, we created our own test-bed on our premises. By doing so, we notice that some aspects are well documented but we found that others might need more attention and clarification. Despite a large community effort, the task to keep information on a fast evolving software ecosystem is tedious and not always the priority for such a project. Therefore, the purpose of the following document is to consolidate all the relevant information to create a test-bed for the Interledger protocol between Ripple and Ethereum. [less ▲]

Detailed reference viewed: 30 (0 UL)
See detailTalent mangement flexibility in a cyclical industry
Usanova, Ksenia; Geraudel, Mickaël UL; D'Armagnac, Sophie et al

Presentation (2019, July 02)

Detailed reference viewed: 54 (0 UL)
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See detailMigratory pathways for start-ups and innovative entrepreneurs in the EU and Norway (Country report Luxembourg)
Sommarribas, Adolfo UL; Petry, Ralph UL; Coda, Nicolas UL et al

Report (2019)

The main objective of this study of the European Migration Network is to provide objective and reliable information about migratory pathways for start-ups and innovative entrepreneurs to Luxembourg ... [more ▼]

The main objective of this study of the European Migration Network is to provide objective and reliable information about migratory pathways for start-ups and innovative entrepreneurs to Luxembourg. Fostering start-ups and innovative enterprises is a national policy priority for Luxembourg as providing support to entrepreneurship and start-ups has been on the Luxembourgish governments’ agenda since 2013. It has been a part of a more general diversification policy of existing economic structures in order to increase economic growth of the country and reduce dependence on the financial sector, which remains the dominant economic pillar. The current Governmental programme 2018–2023 encourages support to start-ups, the acceleration of the development of the start-up ecosystem in Luxembourg as well as the promotion of Luxembourg as a ‘start-up nation’ both at national and international level. What should be pointed out is that this policy is not specifically targeted at third-country start-ups and innovative entrepreneurs, but aims to attract international investment, (innovative) enterprises and researchers in general. Thus, the mainstream immigration policy established by the amended Law of 29 August 2008 on free movement of persons (hereafter referred to as ‘Immigration Law’) for ‘self-employed worker’ or ‘investor’ residence permits is applied. The conditions that need to be fulfilled in order to be issued either a ‘self-employed worker’ or ‘investor’ residence permit as well as the conditions for the renewal of the residence permits are explained in detail in Section 3.3 and in Section 5, respectively. Several of the stakeholders involved in the context of this study reported that the existing regulations are sufficient and there is no need to introduce new ones or ones that would specifically target third-country nationals. Several initiatives have implemented in order to support the development of innovation in Luxembourg. Luxinnovation, the National Agency for the promotion of Research, Development and Innovation, was established already in 1985 and currently is reinforcing Government’s economic development objectives by providing support to companies and researchers in order to foster innovation. One of these initiatives, launched by the Ministry of the Economy in 2015 and implemented by Luxinnovation, is the Fit4Start acceleration programme which is particularly aimed at innovative ICT start-ups and recently also at start-ups from the health technologies. This programme provides coaching, business development support and funding to innovative projects or young innovative start-ups from around the world. Another important policy in the context of this study is the amended Law of 17 May 2017 on the Promotion of Research, Development and Innovation which provides a national funding scheme for Young Innovative Enterprises. Under this scheme, unlisted small enterprises that are registered for a maximum of five years can apply for State aid at the Ministry of the Economy’s Research and Innovation Directorate. Furthermore, Luxinnovation also animates the Luxembourg Cluster Initiative established by the Government in 2002. The objective of this initiative is to encourage communication and exchange of knowledge between cluster members (involving both the public and private sector) as well as to encourage use of new technologies and identification of possible business opportunities. This study further presents a table of rights and incentive measures in place to attract start-up founders and particularly highlights the access to special funding and investments, the co-working spaces as well as the access to incubation/accelerator support programmes, among others. In addition to the elements presented above, this study also elaborates on the following questions: What is the process and what are the requirements for starting up a business in Luxembourg? What are the main sectors and industries in which Luxembourg aims to attract start-ups? What is the role of local and regional authorities in creating and supporting entrepreneurial ecosystems? What role can actors such as local authorities, the private sector or higher education institutions play in attracting start-ups? Are there factors/conditions in place that incentivise start-ups and innovative entrepreneurs to use specific immigration routes? Lastly, with the use of fictional scenarios, four case studies aim to provide an understanding of the possible admission options of different types of start-ups and innovative entrepreneurs. [less ▲]

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See detailCreating better ground truth to further understand Android malware: A large scale mining approach based on antivirus labels and malicious artifacts
Hurier, Médéric UL

Doctoral thesis (2019)

Mobile applications are essential for interacting with technology and other people. With more than 2 billion devices deployed all over the world, Android offers a thriving ecosystem by making accessible ... [more ▼]

Mobile applications are essential for interacting with technology and other people. With more than 2 billion devices deployed all over the world, Android offers a thriving ecosystem by making accessible the work of thousands of developers on digital marketplaces such as Google Play. Nevertheless, the success of Android also exposes millions of users to malware authors who seek to siphon private information and hijack mobile devices for their benefits. To fight against the proliferation of Android malware, the security community embraced machine learning, a branch of artificial intelligence that powers a new generation of detection systems. Machine learning algorithms, however, require a substantial number of qualified samples to learn the classification rules enforced by security experts. Unfortunately, malware ground truths are notoriously hard to construct due to the inherent complexity of Android applications and the global lack of public information about malware. In a context where both information and human resources are limited, the security community is in demand for new approaches to aid practitioners to accurately define Android malware, automate classification decisions, and improve the comprehension of Android malware. This dissertation proposes three solutions to assist with the creation of malware ground truths. The first contribution is STASE, an analytical framework that qualifies the composition of malware ground truths. STASE reviews the information shared by antivirus products with nine metrics in order to support the reproducibility of research experiments and detect potential biases. This dissertation reports the results of STASE against three typical settings and suggests additional recommendations for designing experiments based on Android malware. The second contribution is EUPHONY, a heuristic system built to unify family clusters belonging to malware ground truths. EUPHONY exploits the co-occurrence of malware labels obtained from antivirus reports to study the relationship between Android applications and proposes a single family name per sample for the sake of facilitating malware experiments. This dissertation evaluates EUPHONY on well-known malware ground truths to assess the precision of our approach and produce a large dataset of malware tags for the research community. The third contribution is AP-GRAPH, a knowledge database for dissecting the characteristics of malware ground truths. AP-GRAPH leverages the results of EUPHONY and static analysis to index artifacts that are highly correlated with malware activities and recommend the inspection of the most suspicious components. This dissertation explores the set of artifacts retrieved by AP-GRAPH from popular malware families to track down their correlation and their evolution compared to other malware populations. [less ▲]

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See detailTranslanguaging as a pedagogy, a practice or a strategy? Examples from a preschool and a primary school class in Luxembourg
Kirsch, Claudine UL; Degano, Sarah UL; Mortini, Simone UL

Presentation (2019, July 01)

The concept of translanguaging has been continuously redefined in education, psycholinguistics and sociolinguistics, which has led to some loss of meaning. Regarding teacher translanguaging, studies show ... [more ▼]

The concept of translanguaging has been continuously redefined in education, psycholinguistics and sociolinguistics, which has led to some loss of meaning. Regarding teacher translanguaging, studies show that it has been used as a strategy to further comprehension and learning, and as a pedagogy. The latter recognizes the existence of multiple languages in class and leverages the students’ semiotic system to make meaning and learn (García et al. 2017). Translanguaging has thereby been understood either as a resource-oriented pedagogy that challenges traditional conceptualizations of bilingualism and language learning, or as a pedagogy that fights social inequalities. Most research studies adopt the first view (Poza, 2017). The present paper combines two longitudinal doctoral studies and investigates the ways in which a preschool and a primary school teacher use translanguaging in their classes in Luxembourg. Drawing on interviews and observations, the findings show that the preschool teacher implemented a translanguaging pedagogy. She planned for the use of several languages, opened translanguaging spaces, and systematically translanguaged where she believed it would support learning (Kirsch et al. submitted). By contrast, the primary school teacher used translanguaging as a pedagogical strategy. She used the curricular languages and only translanguaged to support particular students. These differences are explained by the curriculum and the preschool teacher’s attendance of a professional development course. The findings contribute to our understanding of possible ways of implementing translanguaging as a pedagogy. [less ▲]

Detailed reference viewed: 49 (3 UL)