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See detailDesigning personalized, interactive materials for presentation skills
Deroey, Katrien UL

Scientific Conference (2018, June 09)

In this talk I demonstrate how we can design and adapt materials for presentation skills to build on students’ individual needs and disciplinary backgrounds in an interactive way. The context for this is ... [more ▼]

In this talk I demonstrate how we can design and adapt materials for presentation skills to build on students’ individual needs and disciplinary backgrounds in an interactive way. The context for this is a conference skills course I’ve designed and successfully taught for several years. The PhD students on this course vary greatly in their presentation skills, experience and disciplinary background. After an overview of the course content and format, I illustrate how students’ own presentations and research can be integrated so as to enhance personal relevance and interactivity. Aspects of this personalized, interactive course design include filming student presentations, structured peer feedback and reflection, a pre-course questionnaire, and tasks requiring them to work with their conference calls, research, texts, visuals and experiences. I conclude with a summary of course feedback, highlighting what students reported as being particularly useful and what they would add or change. [less ▲]

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See detailUn spectre hante le monde...
Scuto, Denis UL

Article for general public (2018)

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See detailWo mache ich einen Absatz?
Huemer, Birgit UL

Presentation (2018, June 08)

Schreiber gliedern ihre Texte visuell in kleinere Portionen oder Teiltexte, die eine Unterbrechung des Textflusses darstellen und die Information strukturieren (Heinemann & Viehweger 1991). Diese ... [more ▼]

Schreiber gliedern ihre Texte visuell in kleinere Portionen oder Teiltexte, die eine Unterbrechung des Textflusses darstellen und die Information strukturieren (Heinemann & Viehweger 1991). Diese Gliederung erfolgt durch einfache grafisch-formale Mittel, die genre-spezifisch sind und die sich an sprachlich realisierten inhaltlich-thematischen Kriterien sowie an Kriterien der Textkohärenz orientieren (Longacre 1979, van Dijk 1981). Stein (2003) zeigt in seiner Studie, dass der Zusammenhang zwischen dem inhaltlich-thematischen Wechsel und der grafisch-formalen Absatzmarkierung im Text Studierenden der Germanistik als Konzept zwar bekannt ist, jedoch in der Anwendung Schwierigkeiten bereitet. In diesem Vortrag wird am Beispiel deutschsprachiger Masterarbeiten gezeigt, welche Schwierigkeiten den Studierenden die Platzierung und Strukturierung von Absätzen bereitet und welchen Einfluss dies auf Textkohärenz und Leserorientierung hat. Die Ergebnisse basieren auf einer kontrastiven linguistischen Analyse deutsch-, englisch- und französischsprachiger Theoriekapitel in 12 verschiedenen Masterarbeiten aus demselben Fach, in denen die grafisch-formale Absatzmarkierung, die linguistische Struktur von Absätzen und der Einsatz kohäsiver Mittel untersucht wurden. [less ▲]

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See detailGovernance and Price Jumps
Lehnert, Thorsten UL

Scientific Conference (2018, June 07)

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See detailLa mobilité transfrontalière des travailleurs est-elle une ressource pour la Grande Région
Pigeron-Piroth, Isabelle UL; Belkacem, Rachid

Conference given outside the academic context (2018)

La Grande Région est l’un des espaces transfrontaliers les plus concernés par les flux de travail frontalier. Face aux nombreux défis (économiques, démographiques, environnementaux, etc.) auxquels elle se ... [more ▼]

La Grande Région est l’un des espaces transfrontaliers les plus concernés par les flux de travail frontalier. Face aux nombreux défis (économiques, démographiques, environnementaux, etc.) auxquels elle se trouve confrontée, peut-on considérer la mobilité transfrontalière comme une ressource pour les territoires frontaliers ? [less ▲]

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See detailOn biselective operations
Devillet, Jimmy UL; Kiss, Gergely UL

Scientific Conference (2018, June 07)

See attached file

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See detailHome Literacy Environment and Family Language Policy of Preschool Language Minority Children in Luxembourg
Aleksic, Gabrijela UL

Presentation (2018, June 05)

This project aims to explore home literacy environment (HLE) and family language policy (FLP) of language minority preschool children in Luxembourg. These aims were explored through four phases. In the ... [more ▼]

This project aims to explore home literacy environment (HLE) and family language policy (FLP) of language minority preschool children in Luxembourg. These aims were explored through four phases. In the first phase we investigated language resources and activities of children in their families. To achieve this aim, we administered the questionnaires on home literacy environment to the parents with migrant backgrounds from five highest migrant municipalities in Luxembourg. In the second phase, through the interviews with the interested parents from the first phase, we explored family language policy: how parents and children learn, manage and negotiate different languages at home. In the third phase, we tested early literacy and numeracy of preschool language minority children, in their home languages and Luxembourgish, at school. In the fourth phase, we asked the teachers of the participating schools to answer three questions on the challenges and opportunities while working with language minority children and the needs they have to improve their work. This study, the first of its kind in Luxembourg, is extremely important for understanding linguistic state-of-the-art of language minority children in their families. Luxembourg is falling behind the OECD mean in reading (ranked 32nd in 2015), where Portuguese children are being particularly vulnerable. Early literacy skills are critical for children’s later academic achievement. A wealth of research showed that children’s home language should not be abandoned as it is crucial for promoting dynamic multilingualism and assuring cross-linguistic transfer. This study aims to reveal valuable information about home literacy practices and policies of families with language minority preschool children. Based on this information we can strengthen the collaboration with schools regarding children’s multilingual processing and academic achievement. [less ▲]

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See detailClones of pivotally decomposable operations
Couceiro, Miguel; Teheux, Bruno UL

Scientific Conference (2018, June)

We investigate the clones of operations that are pivotally decomposable.

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See detailFunctional equation that characterize higher order derivations
Kiss, Gergely UL

Scientific Conference (2018, June)

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See detailProperness for circle packings and Delaunay circle patterns on complex projective structures
Schlenker, Jean-Marc UL; Yarmola, Andrew UL

E-print/Working paper (2018)

We consider circle packings and, more generally, Delaunay circle patterns - arrangements of circles arising from a Delaunay decomposition of a finite set of points - on surfaces equipped with a complex ... [more ▼]

We consider circle packings and, more generally, Delaunay circle patterns - arrangements of circles arising from a Delaunay decomposition of a finite set of points - on surfaces equipped with a complex projective structure. Motivated by a conjecture of Kojima, Mizushima and Tan, we prove that the forgetful map sending a complex projective structure admitting a circle packing with given nerve (resp. a Delaunay circle pattern with given nerve and intersection angles) to the underlying complex structure is proper. [less ▲]

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See detailEin Rückblick auf die Zukunft. 25 Jahre Verkehrswende
Hesse, Markus UL

in Ökologisches Wirtschaften (2018), 33(2), 16-18

This paper (written in German) provides a reflection on a conceptual framework for transforming mobility policies and practices. It was developed in Germany in the context of the then emerging idea for ... [more ▼]

This paper (written in German) provides a reflection on a conceptual framework for transforming mobility policies and practices. It was developed in Germany in the context of the then emerging idea for transforming energy policies (Energiewende). The aim was to put together related concepts for the sustainable development of the demand for, and supply of, mobility and transport and related contexts (Verkehrswende). It was first presented in book format 25 years ago. On that occasion, and since the term has gained some attention and recognition in political realms recently, the concept is subject to a critical reflection from today's perspective. [less ▲]

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See detailPerformance Analysis of CoAP under Satellite Link Disruption
Giotti, Domenico UL; Lamorte, Luca UL; Soua, Ridha UL et al

in Performance Analysis of CoAP under Satellite Link Disruption (2018, June)

Internet of Things (IoT) devices connectivity is steadily increasing in both heterogeneity and sophistication. However, classical and emerging technology (Wi-Fi, Zigbee, LoRa, etc.) are not able to ... [more ▼]

Internet of Things (IoT) devices connectivity is steadily increasing in both heterogeneity and sophistication. However, classical and emerging technology (Wi-Fi, Zigbee, LoRa, etc.) are not able to support well IoT applications, when terrestrial networks are no longer available (e.g., in remote not habitable areas, in the occurrence of calamities). Subsequently, the only way forward is to transmit IoT data over satellite. The integrated satellite-terrestrial networks are emerging as a promising solution to ensure ubiquitous IoT connectivity, higher throughput and reliability. Being different by design, IoT protocols’ tuning is needed to integrate terrestrial and satellite segments. In the current paper, we evaluate the performances of CoAP, the well-known lightweight application protocol for IoT in an integrated scenario, taking into account the satellite link disruption. The key findings of our study, conducted using the OpenSAND simulator, show that decreasing the value of congestion control parameters proposed by the standard [1], mainly ACK_TIMEOUT and ACK_RANDOM_FACTOR, is crucial to achieve lower end-to-end delays and higher packet delivery ratio. [less ▲]

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See detailEnergy-Efficient Data Acquisition in Mobile Crowdsensing Systems
Capponi, Andrea UL

in 19th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), Chania, Greece, 2018 (2018, June)

Mobile Crowdsensing (MCS) is one of the most promising paradigms for monitoring phenomena in urban environments. The success of a MCS campaign relies on large participation of citizens, who may be ... [more ▼]

Mobile Crowdsensing (MCS) is one of the most promising paradigms for monitoring phenomena in urban environments. The success of a MCS campaign relies on large participation of citizens, who may be reluctant in joining a campaign due to sensing and reporting costs they sustain. Hence, it is fundamental to propose efficient data collection frameworks (DCFs). In the first stages of our work, we proposed an energyefficient DCF that aims to minimize energy consumption while maximizing the utility of contributed data. Then, we developed an Android application and proposed a methodology to compare several DCFs, performing energy- and network-related measures with Power Monitor and Wireshark. Currently, we are investigating collaborative data delivery as a more efficient solution than the individual one. The key idea is to form groups of users and elect a responsible for aggregated data delivery. To this end, it is crucial to analyze device to device (D2D) communications and propose efficient policies for group formation and owner election. To evaluate the performance in realistic urban environments we exploit CrowdSenSim, which runs large-scale simulations in citywide scenarios. [less ▲]

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See detailAssociative, idempotent, symmetric, and order-preserving operations on chains
Devillet, Jimmy UL; Teheux, Bruno UL

E-print/Working paper (2018)

We characterize the associative, idempotent, symmetric, and order-preserving operations on (finite) chains in terms of properties of (the Hasse diagram of) their associated semilattice order. In ... [more ▼]

We characterize the associative, idempotent, symmetric, and order-preserving operations on (finite) chains in terms of properties of (the Hasse diagram of) their associated semilattice order. In particular, we prove that the number of associative, idempotent, symmetric, and order-preserving operations on an n-element chain is the nth Catalan number. [less ▲]

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See detailSTUDY OF THE INCORPORATION MECHANISMS OF ORGANIC CHEMICALS INTO HAIR
Chata, Caroline Georgette Samia UL

Doctoral thesis (2018)

Hair presents several advantages for biomonitoring the exposure to pollutants. For instance, this matrix is representative of the mid to long term exposure depending on the length of the sample. However ... [more ▼]

Hair presents several advantages for biomonitoring the exposure to pollutants. For instance, this matrix is representative of the mid to long term exposure depending on the length of the sample. However the question concerning the hair incorporation mechanism of chemicals remain partially unravelled. The subject of the present PhD was the “study of the incorporation mechanisms of organic chemicals into hair” (StICHa). Therefore we focused on the influence of biological and physicochemical parameters on the incorporation of pesticides into hair. The results presented in the project were obtained from three experiments whose two animal experiments conducted on rats. The first one allowed to link levels of exposure of pesticides to the corresponding concentrations in plasma and in hair. This also allowed to study the accumulation of pesticides in the rat body over time and to investigate the influence of the pesticide physicochemical properties on their incorporation into hair. The second one provided pharmacokinetic (PK) parameters of pesticides in blood after a single exposure and highlighted the concept of background exposure corresponding to the detectable chemicals concentration in the animals before exposure due to environmental contamination. An in vitro test was also conducted to investigate bonds between pesticides and blood components and their influence on hair incorporation. [less ▲]

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See detailIdentifying the Cognitive Mechanism Behind Breaks in Presence using Measures of Attention
Holl, Elisabeth UL; Huber, Kerstin; Liebold, Benny et al

Scientific Conference (2018, May 28)

Presence is the perceptual illusion of non-mediation in virtual environments with breaks in presence (BIPs) marking events where the user’s attention is shifted away from the virtual to the physical ... [more ▼]

Presence is the perceptual illusion of non-mediation in virtual environments with breaks in presence (BIPs) marking events where the user’s attention is shifted away from the virtual to the physical environment. Using the concept of BIP allows to investigate specific episodes during virtual encounters, where the state of presence is interrupted. Orienting responses have been identified as a promising cognitive mechanism behind BIPs. However, the differences of orienting to narrative stimuli versus BIPs remains to be investigated. In the current study, we combined established psychophysiological measures of orienting (ECG, GSR) with psychophysiological (pupil dilation) and behavioral measures (STRT) of attention. BIPs are considered to elicit stronger orienting responses and require more cognitive resources. In an experiment, participants navigated through a virtual environment while having to react to narrative and external (BIPs) stimuli. While the data collection has been completed, results from the analysis will be discussed at the conference. [less ▲]

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See detailSmartCheck: Static Analysis of Ethereum Smart Contracts
Tikhomirov, Sergei UL; Voskresenskaya, Ekaterina; Ivanitskiy, Ivan et al

Scientific Conference (2018, May 27)

Ethereum is a major blockchain-based platform for smart contracts – Turing complete programs that are executed in a decentralized network and usually manipulate digital units of value. Solidity is the ... [more ▼]

Ethereum is a major blockchain-based platform for smart contracts – Turing complete programs that are executed in a decentralized network and usually manipulate digital units of value. Solidity is the most mature high-level smart contract language. Ethereum is a hostile execution environment, where anonymous attackers exploit bugs for immediate financial gain. Developers have a very limited ability to patch deployed contracts. Hackers steal up to tens of millions of dollars from flawed contracts, a well-known example being “The DAO“, broken in June 2016. Advice on secure Ethereum programming practices is spread out across blogs, papers, and tutorials. Many sources are outdated due to a rapid pace of development in this field. Automated vulnerability detection tools, which help detect potentially problematic language constructs, are still underdeveloped in this area. We provide a comprehensive classification of code issues in Solidity and implement SmartCheck – an extensible static analysis tool that detects them. SmartCheck translates Solidity source code into an XML-based intermediate representation and checks it against XPath patterns. We evaluated our tool on a big dataset of real-world contracts and compared the results with manual audit on three contracts. Our tool reflects the current state of knowledge on Solidity vulnerabilities and shows significant improvements over alternatives. SmartCheck has its limitations, as detection of some bugs requires more sophisticated techniques such as taint analysis or even manual audit. We believe though that a static analyzer should be an essential part of contract developers’ toolbox, letting them fix simple bugs fast and allocate more effort to complex issues. [less ▲]

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See detailTranslanguaging and Linguistic Creativity and Criticality
Aleksic, Gabrijela UL

Presentation (2018, May 25)

Translanguaging (TL) pedagogy is the strategic deployment of the entire linguistic and non-linguistic repertoire for learning and teaching (García & Seltzer 2016). Particular educational advantages of ... [more ▼]

Translanguaging (TL) pedagogy is the strategic deployment of the entire linguistic and non-linguistic repertoire for learning and teaching (García & Seltzer 2016). Particular educational advantages of translanguaging are: (1) deeper and fuller understanding of the subject matter, (2) helps the development of the weaker language, (3) facilitates home-school links and cooperation, and (4) helps the integration of fluent speakers with early learners (García & Li Wei 2014, p. 67). TL is transformative for the child, for the teacher and the whole education. TL space develops the sense of connectedness (Li Wei 2011b) which is important for children's cognitive, linguistic, and socio-emotional development. By the use of the whole linguistic repertoire children can develop criticality and creativity. According to García and Li Wei (2014), creativity is "pushing and breaking the boundaries between the old and the new, the conventional and the original, and the acceptable and the challenging". (p. 67) while criticality is "the ability to use available evidence appropriately, systematically and insightfully, to inform considered views of cultural, social, political and linguistic wisdom, to question and problematize received wisdom and to express views adequately through reasoned responses to situations" (p. 67). The development of creativity and criticality are important skills for children's education and translanguaging pedagogy creates space for the development of these skills. [less ▲]

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See detailStadtplanung trifft Sozialunternehmen
Schmid, Benedikt UL; Schulz, Christian UL

Article for general public (2018)

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